en.c revision 1.1
1 /* $NetBSD: en.c,v 1.1 1998/06/09 07:53:06 dbj Exp $ */ 2 /* 3 * Copyright (c) 1996 Rolf Grossmann 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 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Rolf Grossmann. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/param.h> 33 #include <sys/types.h> 34 #include <netinet/in.h> 35 #include <netinet/in_systm.h> 36 #include <next68k/dev/enreg.h> 37 #include <next68k/next68k/nextrom.h> 38 #include "enreg.h" 39 #include "dmareg.h" 40 41 #include <stand.h> 42 #include <netif.h> 43 #include <net.h> 44 #include <nfs.h> 45 46 extern char *mg; 47 #define MON(type, off) (*(type *)((u_int) (mg) + off)) 48 49 #ifdef EN_DEBUG 50 #define DPRINTF(x) printf x; 51 #else 52 #define DPRINTF(x) 53 #endif 54 55 #define EN_TIMEOUT 2000000 56 #define EN_RETRIES 10 57 58 int en_match __P((struct netif *nif, void *machdep_hint)); 59 int en_probe __P((struct netif *nif, void *machdep_hint)); 60 void en_init __P((struct iodesc *desc, void *machdep_hint)); 61 int en_get __P((struct iodesc *a, void *b, size_t c, time_t d)); 62 int en_put __P((struct iodesc *a, void *b, size_t c)); 63 void en_end __P((struct netif *a)); 64 65 /* ### static int mountroot __P((int sock)); */ 66 static int en_wait_for_intr __P((int flag)); 67 68 struct netif_stats en_stats; 69 70 struct netif_dif en_ifs[] = { 71 /* dif_unit dif_nsel dif_stats dif_private */ 72 { 0, 1, &en_stats, NULL, }, 73 }; 74 75 struct netif_driver en_driver = { 76 "en", 77 en_match, en_probe, en_init, en_get, en_put, en_end, 78 en_ifs, NENTS(en_ifs) 79 }; 80 81 /* ### int netdev_sock; 82 static int open_count; */ 83 84 char dma_buffer1[MAX_DMASIZE+DMA_ENDALIGNMENT], 85 dma_buffer2[MAX_DMASIZE+DMA_ENDALIGNMENT], 86 *dma_buffers[2]; 87 int next_dma_buffer; 88 89 90 int 91 en_match(struct netif *nif, void *machdep_hint) 92 { 93 /* we always match, because every NeXT has an ethernet interface 94 * and we've checked the unit numbers before we even started this 95 * search. 96 * ### now that open is generic, we should check the params! 97 */ 98 return 1; 99 } 100 101 int 102 en_probe(struct netif *nif, void *machdep_hint) 103 { 104 /* we also always probe ok, see en_match. */ 105 return 0; 106 } 107 108 void 109 en_init(struct iodesc *desc, void *machdep_hint) 110 { 111 volatile struct en_regs *er; 112 volatile u_int *bmap_chip; 113 int i; 114 115 DPRINTF(("en_init\n")); 116 117 er = (struct en_regs *)P_ENET; 118 bmap_chip = (u_int *)P_BMAP; 119 120 dma_buffers[0] = DMA_ALIGN(char *, dma_buffer1); 121 dma_buffers[1] = DMA_ALIGN(char *, dma_buffer2); 122 123 er->reset = EN_RST_RESET; 124 125 /* ### we'll need this when we need to decide which interface to use 126 bmap_chip[12] = 0x90000000; 127 bmap_chip[13] = ~(0x80000000|0x10000000); * BMAP_TPE ??? 128 */ 129 130 er->txmode = EN_TMD_LB_DISABLE; 131 er->txmask = 0; 132 er->txstat = 0xff; 133 er->rxmode = EN_RMD_RECV_NORMAL; 134 er->rxmask = 0; 135 er->rxstat = 0xff; 136 for (i=0; i<6; i++) 137 er->addr[i] = desc->myea[i] = MON(char *,MG_clientetheraddr)[i]; 138 139 DPRINTF(("ethernet addr (%x:%x:%x:%x:%x:%x)\n", 140 desc->myea[0],desc->myea[1],desc->myea[2], 141 desc->myea[3],desc->myea[4],desc->myea[5])); 142 143 er->reset = 0; 144 } 145 146 /* ### remove this when things work! */ 147 #define XCHR(x) "0123456789abcdef"[(x) & 0xf] 148 void 149 dump_pkt(unsigned char *pkt, size_t len) 150 { 151 size_t i, j; 152 153 printf("0000: "); 154 for(i=0; i<len; i++) { 155 printf("%c%c ", XCHR(pkt[i]>>4), XCHR(pkt[i])); 156 if ((i+1) % 16 == 0) { 157 printf(" %c", '"'); 158 for(j=0; j<16; j++) 159 printf("%c", pkt[i-15+j]>=32 && pkt[i-15+j]<127?pkt[i-15+j]:'.'); 160 printf("%c\n%c%c%c%c: ", '"', XCHR((i+1)>>12), 161 XCHR((i+1)>>8), XCHR((i+1)>>4), XCHR(i+1)); 162 } 163 } 164 printf("\n"); 165 } 166 167 int 168 en_put(struct iodesc *desc, void *pkt, size_t len) 169 { 170 volatile struct en_regs *er; 171 volatile struct dma_dev *txdma; 172 int state, txs; 173 int retries; 174 175 DPRINTF(("en_put: %d bytes at 0x%lx\n", len, (unsigned long)pkt)); 176 #if 0 177 dump_pkt(pkt,len); 178 #endif 179 180 er = (struct en_regs *)P_ENET; 181 txdma = (struct dma_dev *)P_ENETX_CSR; 182 183 DPRINTF(("en_put: txdma->dd_csr = %x\n",txdma->dd_csr)); 184 185 if (len > 1600) { 186 errno = EINVAL; 187 return -1; 188 } 189 190 while ((er->txstat & EN_TXS_READY) == 0) 191 printf("en: tx not ready\n"); 192 193 for (retries = 0; retries < EN_RETRIES; retries++) { 194 er->txstat = 0xff; 195 bcopy(pkt, dma_buffers[0], len); 196 txdma->dd_csr = 0; 197 txdma->dd_csr = DMACSR_INITBUF | DMACSR_RESET | DMACSR_WRITE; 198 txdma->dd_next_initbuf = dma_buffers[0]; 199 txdma->dd_limit = ENDMA_ENDALIGN(char *, dma_buffers[0]+len); 200 txdma->dd_start = 0; 201 txdma->dd_stop = 0; 202 txdma->dd_csr = DMACSR_SETENABLE; 203 204 while(1) { 205 if (en_wait_for_intr(ENETX_DMA_INTR)) { 206 errno = EIO; 207 return -1; 208 } 209 210 state = txdma->dd_csr & 211 (DMACSR_BUSEXC | DMACSR_COMPLETE 212 | DMACSR_SUPDATE | DMACSR_ENABLE); 213 214 #if 0 215 DPRINTF(("en_put: dma state = 0x%x.\n", state)); 216 #endif 217 if (state & (DMACSR_COMPLETE|DMACSR_BUSEXC)) 218 txdma->dd_csr = DMACSR_RESET | DMACSR_CLRCOMPLETE; 219 break; 220 } 221 222 txs = er->txstat; 223 224 #if 0 225 DPRINTF(("en_put: done txstat=%x.\n", txs)); 226 #endif 227 228 #define EN_TXS_ERROR (EN_TXS_SHORTED | EN_TXS_UNDERFLOW | EN_TXS_PARERR) 229 if ((state & DMACSR_COMPLETE) == 0 || 230 (txs & EN_TXS_ERROR) != 0) { 231 errno = EIO; 232 return -1; 233 } 234 if ((txs & EN_TXS_COLLERR) == 0) 235 return len; /* success */ 236 } 237 238 errno = EIO; /* too many retries */ 239 return -1; 240 } 241 242 int 243 en_get(struct iodesc *desc, void *pkt, size_t len, time_t timeout) 244 { 245 volatile struct en_regs *er; 246 volatile struct dma_dev *rxdma; 247 int state, rxs; 248 size_t rlen; 249 char *gotpkt; 250 251 rxdma = (struct dma_dev *)P_ENETR_CSR; 252 er = (struct en_regs *)P_ENET; 253 254 er->rxstat = 0xff; 255 256 /* this is mouse's code now ... still doesn't work :( */ 257 /* The previous comment is now a lie, this does work 258 * Darrin B Jewell <jewell (at) mit.edu> Sat Jan 24 21:44:56 1998 259 */ 260 261 rxdma->dd_csr = 0; 262 rxdma->dd_csr = DMACSR_INITBUF | DMACSR_READ | DMACSR_RESET; 263 264 rxdma->dd_saved_next = 0; 265 rxdma->dd_saved_limit = 0; 266 rxdma->dd_saved_start = 0; 267 rxdma->dd_saved_stop = 0; 268 269 rxdma->dd_next = dma_buffers[0]; 270 rxdma->dd_limit = DMA_ENDALIGN(char *, dma_buffers[0]+MAX_DMASIZE); 271 rxdma->dd_start = 0; 272 rxdma->dd_stop = 0; 273 rxdma->dd_csr = DMACSR_SETENABLE; 274 275 #if 0 276 DPRINTF(("en_get: blocking on rcv dma\n")); 277 #endif 278 279 while(1) { 280 if (en_wait_for_intr(ENETR_DMA_INTR)) { /* ### use timeout? */ 281 errno = EIO; 282 return -1; 283 } 284 285 state = rxdma->dd_csr & 286 (DMACSR_BUSEXC | DMACSR_COMPLETE 287 | DMACSR_SUPDATE | DMACSR_ENABLE); 288 DPRINTF(("en_get: dma state = 0x%x.\n", state)); 289 if ((state & DMACSR_ENABLE) == 0) { 290 rxdma->dd_csr = DMACSR_RESET | DMACSR_CLRCOMPLETE; 291 break; 292 } 293 294 if (state & DMACSR_COMPLETE) { 295 DPRINTF(("en_get: ending dma sequence\n")); 296 rxdma->dd_csr = DMACSR_CLRCOMPLETE; 297 } 298 299 } 300 301 rxs = er->rxstat; 302 303 if ((state & DMACSR_COMPLETE) == 0 || 304 (rxs & EN_RX_OK) == 0) { 305 errno = EIO; 306 return -1; /* receive failed */ 307 } 308 309 gotpkt = rxdma->dd_saved_next; 310 rlen = rxdma->dd_next - rxdma->dd_saved_next; 311 312 if (gotpkt != dma_buffers[0]) { 313 printf("Unexpected received packet location\n"); 314 printf("DEBUG: rxstat=%x.\n", rxs); 315 printf("DEBUG: gotpkt = 0x%lx, rlen = %d, len = %d\n",(u_long)gotpkt,rlen,len); 316 printf("DEBUG: rxdma->dd_csr = 0x%lx\n",(u_long)rxdma->dd_csr); 317 printf("DEBUG: rxdma->dd_saved_next = 0x%lx\n",(u_long)rxdma->dd_saved_next); 318 printf("DEBUG: rxdma->dd_saved_limit = 0x%lx\n",(u_long)rxdma->dd_saved_limit); 319 printf("DEBUG: rxdma->dd_saved_start = 0x%lx\n",(u_long)rxdma->dd_saved_start); 320 printf("DEBUG: rxdma->dd_saved_stop = 0x%lx\n",(u_long)rxdma->dd_saved_stop); 321 printf("DEBUG: rxdma->dd_next = 0x%lx\n",(u_long)rxdma->dd_next); 322 printf("DEBUG: rxdma->dd_limit = 0x%lx\n",(u_long)rxdma->dd_limit); 323 printf("DEBUG: rxdma->dd_start = 0x%lx\n",(u_long)rxdma->dd_start); 324 printf("DEBUG: rxdma->dd_stop = 0x%lx\n",(u_long)rxdma->dd_stop); 325 printf("DEBUG: rxdma->dd_next_initbuf = 0x%lx\n",(u_long)rxdma->dd_next_initbuf); 326 } 327 328 #if 0 329 dump_pkt(gotpkt, rlen < 255 ? rlen : 128); 330 #endif 331 332 DPRINTF(("en_get: done rxstat=%x.\n", rxs)); 333 334 if (rlen > len) { 335 DPRINTF(("en_get: buffer too small. want %d, got %d\n", 336 len, rlen)); 337 rlen = len; 338 } 339 340 341 bcopy(gotpkt, pkt, rlen); 342 343 #if 0 344 printf("DEBUG: gotpkt = 0x%lx, pkt = 0x%lx, rlen = %d\n", 345 (u_long)gotpkt,(u_long)pkt,rlen); 346 dump_pkt(gotpkt, rlen < 255 ? rlen : 128); 347 dump_pkt(pkt, rlen < 255 ? rlen : 128); 348 #endif 349 350 return rlen; 351 } 352 353 354 void 355 en_end(struct netif *a) 356 { 357 DPRINTF(("en_end: WARNING not doing anything\n")); 358 } 359 360 #if 0 361 362 #define MKPANIC(ret,name,args) \ 363 ret name args { panic(#name ## ": not implemented.\n"); } 364 365 MKPANIC(void, en_end, (struct netif *a)); 366 367 /* device functions */ 368 369 int 370 enopen(struct open_file *f, char count, char lun, char part) 371 { 372 int error; 373 374 DPRINTF(("open: en(%d,%d,%d)\n", count, lun, part)); 375 376 if (count != 0 || lun != 0 || part != 0) 377 return EUNIT; /* there can be exactly one ethernet */ 378 379 if (open_count == 0) { 380 /* Find network interface. */ 381 if ((netdev_sock = netif_open(NULL)) < 0) 382 return errno; 383 if ((error = mountroot(netdev_sock)) != 0) { 384 if (open_count == 0) 385 netif_close(netdev_sock); 386 return error; 387 } 388 } 389 open_count++; 390 f->f_devdata = NULL; /* ### nfs_root_node ?! */ 391 return 0; 392 } 393 394 int 395 enclose(struct open_file *f) 396 { 397 if (open_count > 0) 398 if (--open_count == 0) 399 netif_close(netdev_sock); 400 f->f_devdata = NULL; 401 return 0; 402 } 403 404 int 405 enstrategy(void *devdata, int rw, daddr_t dblk, 406 size_t size, void *buf, size_t *rsize) 407 { 408 return ENXIO; /* wrong access method */ 409 } 410 411 /* private function */ 412 413 static int 414 mountroot(int sock) 415 { 416 /* Mount the root directory from a boot server */ 417 #if 0 418 struct in_addr in = { 419 0xc2793418 420 }; 421 u_char *res; 422 423 res = arpwhohas(socktodesc(sock), in); 424 panic("arpwhohas returned %s", res); 425 #endif 426 /* 1. use bootp. This does most of the work for us. */ 427 bootp(sock); 428 429 if (myip.s_addr == 0 || rootip.s_addr == 0 || rootpath[0] == '\0') 430 return ETIMEDOUT; 431 432 printf("Using IP address: %s\n", inet_ntoa(myip)); 433 printf("root addr=%s path=%s\n", inet_ntoa(rootip), rootpath); 434 435 /* 2. mount. */ 436 if (nfs_mount(sock, rootip, rootpath) < 0) 437 return errno; 438 439 return 0; 440 } 441 #endif 442 443 static int 444 en_wait_for_intr(int flag) 445 { 446 volatile int *intrstat = MON(volatile int *,MG_intrstat); 447 448 int count; 449 450 for(count = 0; count < EN_TIMEOUT; count++) 451 if (*intrstat & flag) 452 return 0; 453 454 printf("enintr: timed out.\n"); 455 return -1; 456 } 457
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