if_xe.c revision 1.24.18.1
1 /* $NetBSD: if_xe.c,v 1.24.18.1 2019/06/10 22:06:35 christos Exp $ */ 2 /* 3 * Copyright (c) 1998 Darrin B. Jewell 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __KERNEL_RCSID(0, "$NetBSD: if_xe.c,v 1.24.18.1 2019/06/10 22:06:35 christos Exp $"); 29 30 #include "opt_inet.h" 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/mbuf.h> 35 #include <sys/syslog.h> 36 #include <sys/socket.h> 37 #include <sys/device.h> 38 39 #include <net/if.h> 40 #include <net/if_ether.h> 41 #include <net/if_media.h> 42 43 #ifdef INET 44 #include <netinet/in.h> 45 #include <netinet/if_inarp.h> 46 #endif 47 48 #include <machine/autoconf.h> 49 #include <machine/cpu.h> 50 #include <machine/intr.h> 51 #include <machine/bus.h> 52 53 #include <next68k/next68k/isr.h> 54 55 #include <next68k/dev/mb8795reg.h> 56 #include <next68k/dev/mb8795var.h> 57 58 #include <next68k/dev/bmapreg.h> 59 #include <next68k/dev/intiovar.h> 60 #include <next68k/dev/nextdmareg.h> 61 #include <next68k/dev/nextdmavar.h> 62 63 #include <next68k/dev/if_xevar.h> 64 #include <next68k/dev/if_xereg.h> 65 66 #ifdef DEBUG 67 #define XE_DEBUG 68 #endif 69 70 #ifdef XE_DEBUG 71 int xe_debug = 0; 72 #define DPRINTF(x) if (xe_debug) printf x; 73 #else 74 #define DPRINTF(x) 75 #endif 76 #define PRINTF(x) printf x; 77 78 extern int turbo; 79 80 int xe_match(device_t, cfdata_t, void *); 81 void xe_attach(device_t, device_t, void *); 82 int xe_tint(void *); 83 int xe_rint(void *); 84 85 struct mbuf *xe_dma_rxmap_load(struct mb8795_softc *, bus_dmamap_t); 86 87 bus_dmamap_t xe_dma_rx_continue(void *); 88 void xe_dma_rx_completed(bus_dmamap_t, void *); 89 bus_dmamap_t xe_dma_tx_continue(void *); 90 void xe_dma_tx_completed(bus_dmamap_t, void *); 91 void xe_dma_rx_shutdown(void *); 92 void xe_dma_tx_shutdown(void *); 93 94 static void findchannel_defer(device_t); 95 96 CFATTACH_DECL_NEW(xe, sizeof(struct xe_softc), 97 xe_match, xe_attach, NULL, NULL); 98 99 static int xe_dma_medias[] = { 100 IFM_ETHER | IFM_AUTO, 101 IFM_ETHER | IFM_10_T, 102 IFM_ETHER | IFM_10_2, 103 }; 104 static int nxe_dma_medias = __arraycount(xe_dma_medias); 105 106 static int attached = 0; 107 108 /* 109 * Functions and the switch for the MI code. 110 */ 111 u_char xe_read_reg(struct mb8795_softc *, int); 112 void xe_write_reg(struct mb8795_softc *, int, u_char); 113 void xe_dma_reset(struct mb8795_softc *); 114 void xe_dma_rx_setup(struct mb8795_softc *); 115 void xe_dma_rx_go(struct mb8795_softc *); 116 struct mbuf * xe_dma_rx_mbuf(struct mb8795_softc *); 117 void xe_dma_tx_setup(struct mb8795_softc *); 118 void xe_dma_tx_go(struct mb8795_softc *); 119 int xe_dma_tx_mbuf(struct mb8795_softc *, struct mbuf *); 120 int xe_dma_tx_isactive(struct mb8795_softc *); 121 122 struct mb8795_glue xe_glue = { 123 xe_read_reg, 124 xe_write_reg, 125 xe_dma_reset, 126 xe_dma_rx_setup, 127 xe_dma_rx_go, 128 xe_dma_rx_mbuf, 129 xe_dma_tx_setup, 130 xe_dma_tx_go, 131 xe_dma_tx_mbuf, 132 xe_dma_tx_isactive, 133 }; 134 135 int 136 xe_match(device_t parent, cfdata_t match, void *aux) 137 { 138 struct intio_attach_args *ia = (struct intio_attach_args *)aux; 139 140 if (attached) 141 return 0; 142 143 ia->ia_addr = (void *)NEXT_P_ENET; 144 145 return 1; 146 } 147 148 static void 149 findchannel_defer(device_t self) 150 { 151 struct xe_softc *xsc = device_private(self); 152 struct mb8795_softc *sc = &xsc->sc_mb8795; 153 int i, error; 154 155 if (!xsc->sc_txdma) { 156 xsc->sc_txdma = nextdma_findchannel ("enetx"); 157 if (xsc->sc_txdma == NULL) 158 panic("%s: can't find enetx DMA channel", 159 device_xname(sc->sc_dev)); 160 } 161 if (!xsc->sc_rxdma) { 162 xsc->sc_rxdma = nextdma_findchannel ("enetr"); 163 if (xsc->sc_rxdma == NULL) 164 panic ("%s: can't find enetr DMA channel", 165 device_xname(sc->sc_dev)); 166 } 167 aprint_normal_dev(sc->sc_dev, "using DMA channels %s %s\n", 168 device_xname(xsc->sc_txdma->sc_dev), 169 device_xname(xsc->sc_rxdma->sc_dev)); 170 171 nextdma_setconf (xsc->sc_rxdma, continue_cb, xe_dma_rx_continue); 172 nextdma_setconf (xsc->sc_rxdma, completed_cb, xe_dma_rx_completed); 173 nextdma_setconf (xsc->sc_rxdma, shutdown_cb, xe_dma_rx_shutdown); 174 nextdma_setconf (xsc->sc_rxdma, cb_arg, sc); 175 176 nextdma_setconf (xsc->sc_txdma, continue_cb, xe_dma_tx_continue); 177 nextdma_setconf (xsc->sc_txdma, completed_cb, xe_dma_tx_completed); 178 nextdma_setconf (xsc->sc_txdma, shutdown_cb, xe_dma_tx_shutdown); 179 nextdma_setconf (xsc->sc_txdma, cb_arg, sc); 180 181 /* Initialize the DMA maps */ 182 error = bus_dmamap_create(xsc->sc_txdma->sc_dmat, MCLBYTES, 183 (MCLBYTES/MSIZE), MCLBYTES, 0, BUS_DMA_ALLOCNOW, 184 &xsc->sc_tx_dmamap); 185 if (error) { 186 aprint_error_dev(sc->sc_dev, 187 "can't create tx DMA map, error = %d", error); 188 } 189 190 for(i = 0; i < MB8795_NRXBUFS; i++) { 191 error = bus_dmamap_create(xsc->sc_rxdma->sc_dmat, MCLBYTES, 192 (MCLBYTES/MSIZE), MCLBYTES, 0, BUS_DMA_ALLOCNOW, 193 &xsc->sc_rx_dmamap[i]); 194 if (error) { 195 panic("%s: can't create rx DMA map, error = %d", 196 device_xname(sc->sc_dev), error); 197 } 198 xsc->sc_rx_mb_head[i] = NULL; 199 } 200 xsc->sc_rx_loaded_idx = 0; 201 xsc->sc_rx_completed_idx = 0; 202 xsc->sc_rx_handled_idx = 0; 203 204 /* @@@ more next hacks 205 * the 2000 covers at least a 1500 mtu + headers 206 * + DMA_BEGINALIGNMENT+ DMA_ENDALIGNMENT 207 */ 208 xsc->sc_txbuf = malloc(2000, M_DEVBUF, M_NOWAIT); 209 if (!xsc->sc_txbuf) 210 panic("%s: can't malloc tx DMA buffer", 211 device_xname(sc->sc_dev)); 212 213 xsc->sc_tx_mb_head = NULL; 214 xsc->sc_tx_loaded = 0; 215 216 mb8795_config(sc, xe_dma_medias, nxe_dma_medias, xe_dma_medias[0]); 217 218 isrlink_autovec(xe_tint, sc, NEXT_I_IPL(NEXT_I_ENETX), 1, NULL); 219 INTR_ENABLE(NEXT_I_ENETX); 220 isrlink_autovec(xe_rint, sc, NEXT_I_IPL(NEXT_I_ENETR), 1, NULL); 221 INTR_ENABLE(NEXT_I_ENETR); 222 } 223 224 void 225 xe_attach(device_t parent, device_t self, void *aux) 226 { 227 struct intio_attach_args *ia = (struct intio_attach_args *)aux; 228 struct xe_softc *xsc = device_private(self); 229 struct mb8795_softc *sc = &xsc->sc_mb8795; 230 231 sc->sc_dev = self; 232 DPRINTF(("%s: xe_attach()\n", device_xname(self))); 233 234 { 235 /* kludge from machdep.c:next68k_bootargs() */ 236 extern u_char rom_enetaddr[6]; 237 int i; 238 239 for (i = 0; i < 6; i++) 240 sc->sc_enaddr[i] = rom_enetaddr[i]; 241 } 242 243 printf("\n%s: MAC address %02x:%02x:%02x:%02x:%02x:%02x\n", 244 device_xname(self), 245 sc->sc_enaddr[0],sc->sc_enaddr[1],sc->sc_enaddr[2], 246 sc->sc_enaddr[3],sc->sc_enaddr[4],sc->sc_enaddr[5]); 247 248 xsc->sc_bst = ia->ia_bst; 249 if (bus_space_map(xsc->sc_bst, NEXT_P_ENET, 250 XE_DEVICE_SIZE, 0, &xsc->sc_bsh)) { 251 panic("\n%s: can't map mb8795 registers", 252 device_xname(self)); 253 } 254 255 sc->sc_bmap_bst = ia->ia_bst; 256 if (bus_space_map(sc->sc_bmap_bst, NEXT_P_BMAP, 257 BMAP_SIZE, 0, &sc->sc_bmap_bsh)) 258 panic("\n%s: can't map bmap registers", device_xname(self)); 259 260 /* Set up glue for MI code. */ 261 sc->sc_glue = &xe_glue; 262 263 xsc->sc_txdma = nextdma_findchannel("enetx"); 264 xsc->sc_rxdma = nextdma_findchannel("enetr"); 265 if (xsc->sc_rxdma && xsc->sc_txdma) 266 findchannel_defer(self); 267 else 268 config_defer(self, findchannel_defer); 269 270 attached = 1; 271 } 272 273 int 274 xe_tint(void *arg) 275 { 276 if (!INTR_OCCURRED(NEXT_I_ENETX)) 277 return 0; 278 mb8795_tint((struct mb8795_softc *)arg); 279 return 1; 280 } 281 282 int 283 xe_rint(void *arg) 284 { 285 if (!INTR_OCCURRED(NEXT_I_ENETR)) 286 return 0; 287 mb8795_rint((struct mb8795_softc *)arg); 288 return 1; 289 } 290 291 /* 292 * Glue functions. 293 */ 294 295 u_char 296 xe_read_reg(struct mb8795_softc *sc, int reg) 297 { 298 struct xe_softc *xsc = (struct xe_softc *)sc; 299 300 return bus_space_read_1(xsc->sc_bst, xsc->sc_bsh, reg); 301 } 302 303 void 304 xe_write_reg(struct mb8795_softc *sc, int reg, u_char val) 305 { 306 struct xe_softc *xsc = (struct xe_softc *)sc; 307 308 bus_space_write_1(xsc->sc_bst, xsc->sc_bsh, reg, val); 309 } 310 311 void 312 xe_dma_reset(struct mb8795_softc *sc) 313 { 314 struct xe_softc *xsc = (struct xe_softc *)sc; 315 int i; 316 317 DPRINTF(("xe DMA reset\n")); 318 319 nextdma_reset(xsc->sc_rxdma); 320 nextdma_reset(xsc->sc_txdma); 321 322 if (xsc->sc_tx_loaded) { 323 bus_dmamap_sync(xsc->sc_txdma->sc_dmat, xsc->sc_tx_dmamap, 324 0, xsc->sc_tx_dmamap->dm_mapsize, BUS_DMASYNC_POSTWRITE); 325 bus_dmamap_unload(xsc->sc_txdma->sc_dmat, xsc->sc_tx_dmamap); 326 xsc->sc_tx_loaded = 0; 327 } 328 if (xsc->sc_tx_mb_head) { 329 m_freem(xsc->sc_tx_mb_head); 330 xsc->sc_tx_mb_head = NULL; 331 } 332 333 for(i = 0; i < MB8795_NRXBUFS; i++) { 334 if (xsc->sc_rx_mb_head[i]) { 335 bus_dmamap_unload(xsc->sc_rxdma->sc_dmat, 336 xsc->sc_rx_dmamap[i]); 337 m_freem(xsc->sc_rx_mb_head[i]); 338 xsc->sc_rx_mb_head[i] = NULL; 339 } 340 } 341 } 342 343 void 344 xe_dma_rx_setup(struct mb8795_softc *sc) 345 { 346 struct xe_softc *xsc = (struct xe_softc *)sc; 347 int i; 348 349 DPRINTF(("xe DMA rx setup\n")); 350 351 for(i = 0; i < MB8795_NRXBUFS; i++) 352 xsc->sc_rx_mb_head[i] = 353 xe_dma_rxmap_load(sc, xsc->sc_rx_dmamap[i]); 354 355 xsc->sc_rx_loaded_idx = 0; 356 xsc->sc_rx_completed_idx = 0; 357 xsc->sc_rx_handled_idx = 0; 358 359 nextdma_init(xsc->sc_rxdma); 360 } 361 362 void 363 xe_dma_rx_go(struct mb8795_softc *sc) 364 { 365 struct xe_softc *xsc = (struct xe_softc *)sc; 366 367 DPRINTF(("xe DMA rx go\n")); 368 369 nextdma_start(xsc->sc_rxdma, DMACSR_SETREAD); 370 } 371 372 struct mbuf * 373 xe_dma_rx_mbuf(struct mb8795_softc *sc) 374 { 375 struct xe_softc *xsc = (struct xe_softc *)sc; 376 bus_dmamap_t map; 377 struct mbuf *m; 378 379 m = NULL; 380 if (xsc->sc_rx_handled_idx != xsc->sc_rx_completed_idx) { 381 xsc->sc_rx_handled_idx++; 382 xsc->sc_rx_handled_idx %= MB8795_NRXBUFS; 383 384 map = xsc->sc_rx_dmamap[xsc->sc_rx_handled_idx]; 385 m = xsc->sc_rx_mb_head[xsc->sc_rx_handled_idx]; 386 387 m->m_len = map->dm_xfer_len; 388 389 bus_dmamap_sync(xsc->sc_rxdma->sc_dmat, map, 390 0, map->dm_mapsize, BUS_DMASYNC_POSTREAD); 391 392 bus_dmamap_unload(xsc->sc_rxdma->sc_dmat, map); 393 394 /* Install a fresh mbuf for next packet */ 395 396 xsc->sc_rx_mb_head[xsc->sc_rx_handled_idx] = 397 xe_dma_rxmap_load(sc,map); 398 399 /* Punt runt packets 400 * DMA restarts create 0 length packets for example 401 */ 402 if (m->m_len < ETHER_MIN_LEN) { 403 m_freem(m); 404 m = NULL; 405 } 406 } 407 return m; 408 } 409 410 void 411 xe_dma_tx_setup(struct mb8795_softc *sc) 412 { 413 struct xe_softc *xsc = (struct xe_softc *)sc; 414 415 DPRINTF(("xe DMA tx setup\n")); 416 417 nextdma_init(xsc->sc_txdma); 418 } 419 420 void 421 xe_dma_tx_go(struct mb8795_softc *sc) 422 { 423 struct xe_softc *xsc = (struct xe_softc *)sc; 424 425 DPRINTF(("xe DMA tx go\n")); 426 427 nextdma_start(xsc->sc_txdma, DMACSR_SETWRITE); 428 } 429 430 int 431 xe_dma_tx_mbuf(struct mb8795_softc *sc, struct mbuf *m) 432 { 433 struct xe_softc *xsc = (struct xe_softc *)sc; 434 int error; 435 436 xsc->sc_tx_mb_head = m; 437 438 /* The following is a next specific hack that should 439 * probably be moved out of MI code. 440 * This macro assumes it can move forward as needed 441 * in the buffer. Perhaps it should zero the extra buffer. 442 */ 443 #define REALIGN_DMABUF(s,l) \ 444 { (s) = ((u_char *)(((unsigned)(s)+DMA_BEGINALIGNMENT-1) \ 445 &~(DMA_BEGINALIGNMENT-1))); \ 446 (l) = ((u_char *)(((unsigned)((s)+(l))+DMA_ENDALIGNMENT-1) \ 447 &~(DMA_ENDALIGNMENT-1)))-(s);} 448 449 #if 0 450 error = bus_dmamap_load_mbuf(xsc->sc_txdma->sc_dmat, 451 xsc->sc_tx_dmamap, xsc->sc_tx_mb_head, BUS_DMA_NOWAIT); 452 #else 453 { 454 u_char *buf = xsc->sc_txbuf; 455 int buflen = 0; 456 457 buflen = m->m_pkthdr.len; 458 459 { 460 u_char *p = buf; 461 for (m=xsc->sc_tx_mb_head; m; m = m->m_next) { 462 if (m->m_len == 0) continue; 463 memcpy(p, mtod(m, u_char *), m->m_len); 464 p += m->m_len; 465 } 466 /* Fix runt packets */ 467 if (buflen < ETHER_MIN_LEN - ETHER_CRC_LEN) { 468 memset(p, 0, 469 ETHER_MIN_LEN - ETHER_CRC_LEN - buflen); 470 buflen = ETHER_MIN_LEN - ETHER_CRC_LEN; 471 } 472 } 473 474 error = bus_dmamap_load(xsc->sc_txdma->sc_dmat, 475 xsc->sc_tx_dmamap, buf, buflen, NULL, BUS_DMA_NOWAIT); 476 } 477 #endif 478 if (error) { 479 aprint_error_dev(sc->sc_dev, 480 "can't load mbuf chain, error = %d\n", error); 481 m_freem(xsc->sc_tx_mb_head); 482 xsc->sc_tx_mb_head = NULL; 483 return error; 484 } 485 486 #ifdef DIAGNOSTIC 487 if (xsc->sc_tx_loaded != 0) { 488 panic("%s: xsc->sc_tx_loaded is %d", device_xname(sc->sc_dev), 489 xsc->sc_tx_loaded); 490 } 491 #endif 492 493 bus_dmamap_sync(xsc->sc_txdma->sc_dmat, xsc->sc_tx_dmamap, 0, 494 xsc->sc_tx_dmamap->dm_mapsize, BUS_DMASYNC_PREWRITE); 495 496 return 0; 497 } 498 499 int 500 xe_dma_tx_isactive(struct mb8795_softc *sc) 501 { 502 struct xe_softc *xsc = (struct xe_softc *)sc; 503 504 return (xsc->sc_tx_loaded != 0); 505 } 506 507 /****************************************************************/ 508 509 void 510 xe_dma_tx_completed(bus_dmamap_t map, void *arg) 511 { 512 #if defined (XE_DEBUG) || defined (DIAGNOSTIC) 513 struct mb8795_softc *sc = arg; 514 #endif 515 #ifdef DIAGNOSTIC 516 struct xe_softc *xsc = (struct xe_softc *)sc; 517 #endif 518 519 DPRINTF(("%s: xe_dma_tx_completed()\n", device_xname(sc->sc_dev))); 520 521 #ifdef DIAGNOSTIC 522 if (!xsc->sc_tx_loaded) 523 panic("%s: tx completed never loaded", 524 device_xname(sc->sc_dev)); 525 526 if (map != xsc->sc_tx_dmamap) 527 panic("%s: unexpected tx completed map", 528 device_xname(sc->sc_dev)); 529 530 #endif 531 } 532 533 void 534 xe_dma_tx_shutdown(void *arg) 535 { 536 struct mb8795_softc *sc = arg; 537 struct xe_softc *xsc = (struct xe_softc *)sc; 538 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 539 540 DPRINTF(("%s: xe_dma_tx_shutdown()\n", device_xname(sc->sc_dev))); 541 542 #ifdef DIAGNOSTIC 543 if (!xsc->sc_tx_loaded) 544 panic("%s: tx shutdown never loaded", 545 device_xname(sc->sc_dev)); 546 #endif 547 548 if (turbo) 549 MB_WRITE_REG(sc, MB8795_TXMODE, MB8795_TXMODE_TURBO1); 550 if (xsc->sc_tx_loaded) { 551 bus_dmamap_sync(xsc->sc_txdma->sc_dmat, xsc->sc_tx_dmamap, 552 0, xsc->sc_tx_dmamap->dm_mapsize, BUS_DMASYNC_POSTWRITE); 553 bus_dmamap_unload(xsc->sc_txdma->sc_dmat, xsc->sc_tx_dmamap); 554 m_freem(xsc->sc_tx_mb_head); 555 xsc->sc_tx_mb_head = NULL; 556 557 xsc->sc_tx_loaded--; 558 } 559 560 #ifdef DIAGNOSTIC 561 if (xsc->sc_tx_loaded != 0) 562 panic("%s: sc->sc_tx_loaded is %d", device_xname(sc->sc_dev), 563 xsc->sc_tx_loaded); 564 #endif 565 566 ifp->if_timer = 0; 567 568 #if 1 569 if ((ifp->if_flags & IFF_RUNNING) && !IF_IS_EMPTY(&sc->sc_tx_snd)) { 570 void mb8795_start_dma(struct mb8795_softc *); /* XXXX */ 571 mb8795_start_dma(sc); 572 } 573 #endif 574 575 #if 0 576 /* Enable ready interrupt */ 577 MB_WRITE_REG(sc, MB8795_TXMASK, 578 MB_READ_REG(sc, MB8795_TXMASK) 579 | MB8795_TXMASK_TXRXIE/* READYIE */); 580 #endif 581 } 582 583 584 void 585 xe_dma_rx_completed(bus_dmamap_t map, void *arg) 586 { 587 struct mb8795_softc *sc = arg; 588 struct xe_softc *xsc = (struct xe_softc *)sc; 589 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 590 591 if (ifp->if_flags & IFF_RUNNING) { 592 xsc->sc_rx_completed_idx++; 593 xsc->sc_rx_completed_idx %= MB8795_NRXBUFS; 594 595 DPRINTF(("%s: xe_dma_rx_completed(), " 596 "sc->sc_rx_completed_idx = %d\n", 597 device_xname(sc->sc_dev), xsc->sc_rx_completed_idx)); 598 599 #if (defined(DIAGNOSTIC)) 600 if (map != xsc->sc_rx_dmamap[xsc->sc_rx_completed_idx]) 601 panic("%s: Unexpected rx dmamap completed", 602 device_xname(sc->sc_dev)); 603 #endif 604 } 605 #ifdef DIAGNOSTIC 606 else 607 DPRINTF(("%s: Unexpected rx dmamap completed while if not " 608 "running\n", device_xname(sc->sc_dev))); 609 #endif 610 } 611 612 void 613 xe_dma_rx_shutdown(void *arg) 614 { 615 struct mb8795_softc *sc = arg; 616 struct xe_softc *xsc = (struct xe_softc *)sc; 617 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 618 619 if (ifp->if_flags & IFF_RUNNING) { 620 DPRINTF(("%s: xe_dma_rx_shutdown(), restarting.\n", 621 device_xname(sc->sc_dev))); 622 623 nextdma_start(xsc->sc_rxdma, DMACSR_SETREAD); 624 if (turbo) 625 MB_WRITE_REG(sc, MB8795_RXMODE, 626 MB8795_RXMODE_TEST | MB8795_RXMODE_MULTICAST); 627 } 628 #ifdef DIAGNOSTIC 629 else 630 DPRINTF(("%s: Unexpected rx DMA shutdown while if not " 631 "running\n", device_xname(sc->sc_dev))); 632 #endif 633 } 634 635 /* 636 * load a dmamap with a freshly allocated mbuf 637 */ 638 struct mbuf * 639 xe_dma_rxmap_load(struct mb8795_softc *sc, bus_dmamap_t map) 640 { 641 struct xe_softc *xsc = (struct xe_softc *)sc; 642 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 643 struct mbuf *m; 644 int error; 645 646 MGETHDR(m, M_DONTWAIT, MT_DATA); 647 if (m) { 648 MCLGET(m, M_DONTWAIT); 649 if ((m->m_flags & M_EXT) == 0) { 650 m_freem(m); 651 m = NULL; 652 } else 653 m->m_len = MCLBYTES; 654 } 655 if (!m) { 656 /* 657 * @@@ Handle this gracefully by reusing a scratch buffer 658 * or something. 659 */ 660 panic("Unable to get memory for incoming ethernet"); 661 } 662 663 /* 664 * Align buffer, @@@ next specific. 665 * perhaps should be using M_ALIGN here instead? 666 * First we give us a little room to align with. 667 */ 668 { 669 u_char *buf = m->m_data; 670 int buflen = m->m_len; 671 buflen -= DMA_ENDALIGNMENT+DMA_BEGINALIGNMENT; 672 REALIGN_DMABUF(buf, buflen); 673 m->m_data = buf; 674 m->m_len = buflen; 675 } 676 677 m_set_rcvif(m, ifp); 678 m->m_pkthdr.len = m->m_len; 679 680 error = bus_dmamap_load_mbuf(xsc->sc_rxdma->sc_dmat, 681 map, m, BUS_DMA_NOWAIT); 682 683 bus_dmamap_sync(xsc->sc_rxdma->sc_dmat, map, 0, 684 map->dm_mapsize, BUS_DMASYNC_PREREAD); 685 686 if (error) { 687 DPRINTF(("DEBUG: m->m_data = %p, m->m_len = %d\n", 688 m->m_data, m->m_len)); 689 DPRINTF(("DEBUG: MCLBYTES = %d, map->_dm_size = %ld\n", 690 MCLBYTES, map->_dm_size)); 691 692 panic("%s: can't load rx mbuf chain, error = %d", 693 device_xname(sc->sc_dev), error); 694 m_freem(m); 695 m = NULL; 696 } 697 698 return m; 699 } 700 701 bus_dmamap_t 702 xe_dma_rx_continue(void *arg) 703 { 704 struct mb8795_softc *sc = arg; 705 struct xe_softc *xsc = (struct xe_softc *)sc; 706 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 707 bus_dmamap_t map = NULL; 708 709 if (ifp->if_flags & IFF_RUNNING) { 710 if (((xsc->sc_rx_loaded_idx+1)%MB8795_NRXBUFS) 711 == xsc->sc_rx_handled_idx) { 712 /* Make space for one packet by dropping one */ 713 struct mbuf *m; 714 m = xe_dma_rx_mbuf (sc); 715 if (m) 716 m_freem(m); 717 #if (defined(DIAGNOSTIC)) 718 DPRINTF(("%s: out of receive DMA buffers\n", 719 device_xname(sc->sc_dev))); 720 #endif 721 } 722 xsc->sc_rx_loaded_idx++; 723 xsc->sc_rx_loaded_idx %= MB8795_NRXBUFS; 724 map = xsc->sc_rx_dmamap[xsc->sc_rx_loaded_idx]; 725 726 DPRINTF(("%s: xe_dma_rx_continue() xsc->sc_rx_loaded_idx " 727 "= %d\n", device_xname(sc->sc_dev), 728 xsc->sc_rx_loaded_idx)); 729 } 730 #ifdef DIAGNOSTIC 731 else 732 panic("%s: Unexpected rx DMA continue while if not running", 733 device_xname(sc->sc_dev)); 734 #endif 735 736 return map; 737 } 738 739 bus_dmamap_t 740 xe_dma_tx_continue(void *arg) 741 { 742 struct mb8795_softc *sc = arg; 743 struct xe_softc *xsc = (struct xe_softc *)sc; 744 bus_dmamap_t map; 745 746 DPRINTF(("%s: xe_dma_tx_continue()\n", device_xname(sc->sc_dev))); 747 748 if (xsc->sc_tx_loaded) 749 map = NULL; 750 else { 751 map = xsc->sc_tx_dmamap; 752 xsc->sc_tx_loaded++; 753 } 754 755 #ifdef DIAGNOSTIC 756 if (xsc->sc_tx_loaded != 1) 757 panic("%s: sc->sc_tx_loaded is %d", device_xname(sc->sc_dev), 758 xsc->sc_tx_loaded); 759 #endif 760 761 return map; 762 } 763
Indexes created Thu Oct 02 01:09:59 GMT 2025