Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 | /* * 7990.c -- LANCE ethernet IC generic routines. * This is an attempt to separate out the bits of various ethernet * drivers that are common because they all use the AMD 7990 LANCE * (Local Area Network Controller for Ethernet) chip. * * Copyright (C) 05/1998 Peter Maydell <pmaydell@chiark.greenend.org.uk> * * Most of this stuff was obtained by looking at other LANCE drivers, * in particular a2065.[ch]. The AMD C-LANCE datasheet was also helpful. * NB: this was made easy by the fact that Jes Sorensen had cleaned up * most of a2025 and sunlance with the aim of merging them, so the * common code was pretty obvious. */ #include <linux/crc32.h> #include <linux/delay.h> #include <linux/errno.h> #include <linux/netdevice.h> #include <linux/etherdevice.h> #include <linux/init.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/types.h> #include <linux/fcntl.h> #include <linux/interrupt.h> #include <linux/ioport.h> #include <linux/in.h> #include <linux/route.h> #include <linux/slab.h> #include <linux/string.h> #include <linux/skbuff.h> #include <asm/irq.h> /* Used for the temporal inet entries and routing */ #include <linux/socket.h> #include <linux/bitops.h> #include <asm/system.h> #include <asm/io.h> #include <asm/dma.h> #include <asm/pgtable.h> #ifdef CONFIG_HP300 #include <asm/blinken.h> #endif #include "7990.h" #define WRITERAP(lp,x) out_be16(lp->base + LANCE_RAP, (x)) #define WRITERDP(lp,x) out_be16(lp->base + LANCE_RDP, (x)) #define READRDP(lp) in_be16(lp->base + LANCE_RDP) #if defined(CONFIG_HPLANCE) || defined(CONFIG_HPLANCE_MODULE) #include "hplance.h" #undef WRITERAP #undef WRITERDP #undef READRDP #if defined(CONFIG_MVME147_NET) || defined(CONFIG_MVME147_NET_MODULE) /* Lossage Factor Nine, Mr Sulu. */ #define WRITERAP(lp,x) (lp->writerap(lp,x)) #define WRITERDP(lp,x) (lp->writerdp(lp,x)) #define READRDP(lp) (lp->readrdp(lp)) #else /* These inlines can be used if only CONFIG_HPLANCE is defined */ static inline void WRITERAP(struct lance_private *lp, __u16 value) { do { out_be16(lp->base + HPLANCE_REGOFF + LANCE_RAP, value); } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); } static inline void WRITERDP(struct lance_private *lp, __u16 value) { do { out_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP, value); } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); } static inline __u16 READRDP(struct lance_private *lp) { __u16 value; do { value = in_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP); } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); return value; } #endif #endif /* CONFIG_HPLANCE || CONFIG_HPLANCE_MODULE */ /* debugging output macros, various flavours */ /* #define TEST_HITS */ #ifdef UNDEF #define PRINT_RINGS() \ do { \ int t; \ for (t=0; t < RX_RING_SIZE; t++) { \ printk("R%d: @(%02X %04X) len %04X, mblen %04X, bits %02X\n",\ t, ib->brx_ring[t].rmd1_hadr, ib->brx_ring[t].rmd0,\ ib->brx_ring[t].length,\ ib->brx_ring[t].mblength, ib->brx_ring[t].rmd1_bits);\ }\ for (t=0; t < TX_RING_SIZE; t++) { \ printk("T%d: @(%02X %04X) len %04X, misc %04X, bits %02X\n",\ t, ib->btx_ring[t].tmd1_hadr, ib->btx_ring[t].tmd0,\ ib->btx_ring[t].length,\ ib->btx_ring[t].misc, ib->btx_ring[t].tmd1_bits);\ }\ } while (0) #else #define PRINT_RINGS() #endif /* Load the CSR registers. The LANCE has to be STOPped when we do this! */ static void load_csrs (struct lance_private *lp) { volatile struct lance_init_block *aib = lp->lance_init_block; int leptr; leptr = LANCE_ADDR (aib); WRITERAP(lp, LE_CSR1); /* load address of init block */ WRITERDP(lp, leptr & 0xFFFF); WRITERAP(lp, LE_CSR2); WRITERDP(lp, leptr >> 16); WRITERAP(lp, LE_CSR3); WRITERDP(lp, lp->busmaster_regval); /* set byteswap/ALEctrl/byte ctrl */ /* Point back to csr0 */ WRITERAP(lp, LE_CSR0); } /* #define to 0 or 1 appropriately */ #define DEBUG_IRING 0 /* Set up the Lance Rx and Tx rings and the init block */ static void lance_init_ring (struct net_device *dev) { struct lance_private *lp = netdev_priv(dev); volatile struct lance_init_block *ib = lp->init_block; volatile struct lance_init_block *aib; /* for LANCE_ADDR computations */ int leptr; int i; aib = lp->lance_init_block; lp->rx_new = lp->tx_new = 0; lp->rx_old = lp->tx_old = 0; ib->mode = LE_MO_PROM; /* normal, enable Tx & Rx */ /* Copy the ethernet address to the lance init block * Notice that we do a byteswap if we're big endian. * [I think this is the right criterion; at least, sunlance, * a2065 and atarilance do the byteswap and lance.c (PC) doesn't. * However, the datasheet says that the BSWAP bit doesn't affect * the init block, so surely it should be low byte first for * everybody? Um.] * We could define the ib->physaddr as three 16bit values and * use (addr[1] << 8) | addr[0] & co, but this is more efficient. */ #ifdef __BIG_ENDIAN ib->phys_addr [0] = dev->dev_addr [1]; ib->phys_addr [1] = dev->dev_addr [0]; ib->phys_addr [2] = dev->dev_addr [3]; ib->phys_addr [3] = dev->dev_addr [2]; ib->phys_addr [4] = dev->dev_addr [5]; ib->phys_addr [5] = dev->dev_addr [4]; #else for (i=0; i<6; i++) ib->phys_addr[i] = dev->dev_addr[i]; #endif if (DEBUG_IRING) printk ("TX rings:\n"); lp->tx_full = 0; /* Setup the Tx ring entries */ for (i = 0; i < (1<<lp->lance_log_tx_bufs); i++) { leptr = LANCE_ADDR(&aib->tx_buf[i][0]); ib->btx_ring [i].tmd0 = leptr; ib->btx_ring [i].tmd1_hadr = leptr >> 16; ib->btx_ring [i].tmd1_bits = 0; ib->btx_ring [i].length = 0xf000; /* The ones required by tmd2 */ ib->btx_ring [i].misc = 0; if (DEBUG_IRING) printk ("%d: 0x%8.8x\n", i, leptr); } /* Setup the Rx ring entries */ if (DEBUG_IRING) printk ("RX rings:\n"); for (i = 0; i < (1<<lp->lance_log_rx_bufs); i++) { leptr = LANCE_ADDR(&aib->rx_buf[i][0]); ib->brx_ring [i].rmd0 = leptr; ib->brx_ring [i].rmd1_hadr = leptr >> 16; ib->brx_ring [i].rmd1_bits = LE_R1_OWN; /* 0xf000 == bits that must be one (reserved, presumably) */ ib->brx_ring [i].length = -RX_BUFF_SIZE | 0xf000; ib->brx_ring [i].mblength = 0; if (DEBUG_IRING) printk ("%d: 0x%8.8x\n", i, leptr); } /* Setup the initialization block */ /* Setup rx descriptor pointer */ leptr = LANCE_ADDR(&aib->brx_ring); ib->rx_len = (lp->lance_log_rx_bufs << 13) | (leptr >> 16); ib->rx_ptr = leptr; if (DEBUG_IRING) printk ("RX ptr: %8.8x\n", leptr); /* Setup tx descriptor pointer */ leptr = LANCE_ADDR(&aib->btx_ring); ib->tx_len = (lp->lance_log_tx_bufs << 13) | (leptr >> 16); ib->tx_ptr = leptr; if (DEBUG_IRING) printk ("TX ptr: %8.8x\n", leptr); /* Clear the multicast filter */ ib->filter [0] = 0; ib->filter [1] = 0; PRINT_RINGS(); } /* LANCE must be STOPped before we do this, too... */ static int init_restart_lance (struct lance_private *lp) { int i; WRITERAP(lp, LE_CSR0); WRITERDP(lp, LE_C0_INIT); /* Need a hook here for sunlance ledma stuff */ /* Wait for the lance to complete initialization */ for (i = 0; (i < 100) && !(READRDP(lp) & (LE_C0_ERR | LE_C0_IDON)); i++) barrier(); if ((i == 100) || (READRDP(lp) & LE_C0_ERR)) { printk ("LANCE unopened after %d ticks, csr0=%4.4x.\n", i, READRDP(lp)); return -1; } /* Clear IDON by writing a "1", enable interrupts and start lance */ WRITERDP(lp, LE_C0_IDON); WRITERDP(lp, LE_C0_INEA | LE_C0_STRT); return 0; } static int lance_reset (struct net_device *dev) { struct lance_private *lp = netdev_priv(dev); int status; /* Stop the lance */ WRITERAP(lp, LE_CSR0); WRITERDP(lp, LE_C0_STOP); load_csrs (lp); lance_init_ring (dev); dev->trans_start = jiffies; status = init_restart_lance (lp); #ifdef DEBUG_DRIVER printk ("Lance restart=%d\n", status); #endif return status; } static int lance_rx (struct net_device *dev) { struct lance_private *lp = netdev_priv(dev); volatile struct lance_init_block *ib = lp->init_block; volatile struct lance_rx_desc *rd; unsigned char bits; int len = 0; /* XXX shut up gcc warnings */ struct sk_buff *skb = 0; /* XXX shut up gcc warnings */ #ifdef TEST_HITS int i; #endif #ifdef TEST_HITS printk ("["); for (i = 0; i < RX_RING_SIZE; i++) { if (i == lp->rx_new) printk ("%s", ib->brx_ring [i].rmd1_bits & LE_R1_OWN ? "_" : "X"); else printk ("%s", ib->brx_ring [i].rmd1_bits & LE_R1_OWN ? "." : "1"); } printk ("]"); #endif #ifdef CONFIG_HP300 blinken_leds(0x40, 0); #endif WRITERDP(lp, LE_C0_RINT | LE_C0_INEA); /* ack Rx int, reenable ints */ for (rd = &ib->brx_ring [lp->rx_new]; /* For each Rx ring we own... */ !((bits = rd->rmd1_bits) & LE_R1_OWN); rd = &ib->brx_ring [lp->rx_new]) { /* We got an incomplete frame? */ if ((bits & LE_R1_POK) != LE_R1_POK) { lp->stats.rx_over_errors++; lp->stats.rx_errors++; continue; } else if (bits & LE_R1_ERR) { /* Count only the end frame as a rx error, * not the beginning */ if (bits & LE_R1_BUF) lp->stats.rx_fifo_errors++; if (bits & LE_R1_CRC) lp->stats.rx_crc_errors++; if (bits & LE_R1_OFL) lp->stats.rx_over_errors++; if (bits & LE_R1_FRA) lp->stats.rx_frame_errors++; if (bits & LE_R1_EOP) lp->stats.rx_errors++; } else { len = (rd->mblength & 0xfff) - 4; skb = dev_alloc_skb (len+2); if (skb == 0) { printk ("%s: Memory squeeze, deferring packet.\n", dev->name); lp->stats.rx_dropped++; rd->mblength = 0; rd->rmd1_bits = LE_R1_OWN; lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask; return 0; } skb_reserve (skb, 2); /* 16 byte align */ skb_put (skb, len); /* make room */ skb_copy_to_linear_data(skb, (unsigned char *)&(ib->rx_buf [lp->rx_new][0]), len); skb->protocol = eth_type_trans (skb, dev); netif_rx (skb); dev->last_rx = jiffies; lp->stats.rx_packets++; lp->stats.rx_bytes += len; } /* Return the packet to the pool */ rd->mblength = 0; rd->rmd1_bits = LE_R1_OWN; lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask; } return 0; } static int lance_tx (struct net_device *dev) { struct lance_private *lp = netdev_priv(dev); volatile struct lance_init_block *ib = lp->init_block; volatile struct lance_tx_desc *td; int i, j; int status; #ifdef CONFIG_HP300 blinken_leds(0x80, 0); #endif /* csr0 is 2f3 */ WRITERDP(lp, LE_C0_TINT | LE_C0_INEA); /* csr0 is 73 */ j = lp->tx_old; for (i = j; i != lp->tx_new; i = j) { td = &ib->btx_ring [i]; /* If we hit a packet not owned by us, stop */ if (td->tmd1_bits & LE_T1_OWN) break; if (td->tmd1_bits & LE_T1_ERR) { status = td->misc; lp->stats.tx_errors++; if (status & LE_T3_RTY) lp->stats.tx_aborted_errors++; if (status & LE_T3_LCOL) lp->stats.tx_window_errors++; if (status & LE_T3_CLOS) { lp->stats.tx_carrier_errors++; if (lp->auto_select) { lp->tpe = 1 - lp->tpe; printk("%s: Carrier Lost, trying %s\n", dev->name, lp->tpe?"TPE":"AUI"); /* Stop the lance */ WRITERAP(lp, LE_CSR0); WRITERDP(lp, LE_C0_STOP); lance_init_ring (dev); load_csrs (lp); init_restart_lance (lp); return 0; } } /* buffer errors and underflows turn off the transmitter */ /* Restart the adapter */ if (status & (LE_T3_BUF|LE_T3_UFL)) { lp->stats.tx_fifo_errors++; printk ("%s: Tx: ERR_BUF|ERR_UFL, restarting\n", dev->name); /* Stop the lance */ WRITERAP(lp, LE_CSR0); WRITERDP(lp, LE_C0_STOP); lance_init_ring (dev); load_csrs (lp); init_restart_lance (lp); return 0; } } else if ((td->tmd1_bits & LE_T1_POK) == LE_T1_POK) { /* * So we don't count the packet more than once. */ td->tmd1_bits &= ~(LE_T1_POK); /* One collision before packet was sent. */ if (td->tmd1_bits & LE_T1_EONE) lp->stats.collisions++; /* More than one collision, be optimistic. */ if (td->tmd1_bits & LE_T1_EMORE) lp->stats.collisions += 2; lp->stats.tx_packets++; } j = (j + 1) & lp->tx_ring_mod_mask; } lp->tx_old = j; WRITERDP(lp, LE_C0_TINT | LE_C0_INEA); return 0; } static irqreturn_t lance_interrupt (int irq, void *dev_id) { struct net_device *dev = (struct net_device *)dev_id; struct lance_private *lp = netdev_priv(dev); int csr0; spin_lock (&lp->devlock); WRITERAP(lp, LE_CSR0); /* LANCE Controller Status */ csr0 = READRDP(lp); PRINT_RINGS(); if (!(csr0 & LE_C0_INTR)) { /* Check if any interrupt has */ spin_unlock (&lp->devlock); return IRQ_NONE; /* been generated by the Lance. */ } /* Acknowledge all the interrupt sources ASAP */ WRITERDP(lp, csr0 & ~(LE_C0_INEA|LE_C0_TDMD|LE_C0_STOP|LE_C0_STRT|LE_C0_INIT)); if ((csr0 & LE_C0_ERR)) { /* Clear the error condition */ WRITERDP(lp, LE_C0_BABL|LE_C0_ERR|LE_C0_MISS|LE_C0_INEA); } if (csr0 & LE_C0_RINT) lance_rx (dev); if (csr0 & LE_C0_TINT) lance_tx (dev); /* Log misc errors. */ if (csr0 & LE_C0_BABL) lp->stats.tx_errors++; /* Tx babble. */ if (csr0 & LE_C0_MISS) lp->stats.rx_errors++; /* Missed a Rx frame. */ if (csr0 & LE_C0_MERR) { printk("%s: Bus master arbitration failure, status %4.4x.\n", dev->name, csr0); /* Restart the chip. */ WRITERDP(lp, LE_C0_STRT); } if (lp->tx_full && netif_queue_stopped(dev) && (TX_BUFFS_AVAIL >= 0)) { lp->tx_full = 0; netif_wake_queue (dev); } WRITERAP(lp, LE_CSR0); WRITERDP(lp, LE_C0_BABL|LE_C0_CERR|LE_C0_MISS|LE_C0_MERR|LE_C0_IDON|LE_C0_INEA); spin_unlock (&lp->devlock); return IRQ_HANDLED; } int lance_open (struct net_device *dev) { struct lance_private *lp = netdev_priv(dev); int res; /* Install the Interrupt handler. Or we could shunt this out to specific drivers? */ if (request_irq(lp->irq, lance_interrupt, IRQF_SHARED, lp->name, dev)) return -EAGAIN; res = lance_reset(dev); spin_lock_init(&lp->devlock); netif_start_queue (dev); return res; } int lance_close (struct net_device *dev) { struct lance_private *lp = netdev_priv(dev); netif_stop_queue (dev); /* Stop the LANCE */ WRITERAP(lp, LE_CSR0); WRITERDP(lp, LE_C0_STOP); free_irq(lp->irq, dev); return 0; } void lance_tx_timeout(struct net_device *dev) { printk("lance_tx_timeout\n"); lance_reset(dev); dev->trans_start = jiffies; netif_wake_queue (dev); } int lance_start_xmit (struct sk_buff *skb, struct net_device *dev) { struct lance_private *lp = netdev_priv(dev); volatile struct lance_init_block *ib = lp->init_block; int entry, skblen, len; static int outs; unsigned long flags; if (!TX_BUFFS_AVAIL) return -1; netif_stop_queue (dev); skblen = skb->len; #ifdef DEBUG_DRIVER /* dump the packet */ { int i; for (i = 0; i < 64; i++) { if ((i % 16) == 0) printk ("\n"); printk ("%2.2x ", skb->data [i]); } } #endif len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen; entry = lp->tx_new & lp->tx_ring_mod_mask; ib->btx_ring [entry].length = (-len) | 0xf000; ib->btx_ring [entry].misc = 0; if (skb->len < ETH_ZLEN) memset((void *)&ib->tx_buf[entry][0], 0, ETH_ZLEN); skb_copy_from_linear_data(skb, (void *)&ib->tx_buf[entry][0], skblen); /* Now, give the packet to the lance */ ib->btx_ring [entry].tmd1_bits = (LE_T1_POK|LE_T1_OWN); lp->tx_new = (lp->tx_new+1) & lp->tx_ring_mod_mask; outs++; /* Kick the lance: transmit now */ WRITERDP(lp, LE_C0_INEA | LE_C0_TDMD); dev->trans_start = jiffies; dev_kfree_skb (skb); spin_lock_irqsave (&lp->devlock, flags); if (TX_BUFFS_AVAIL) netif_start_queue (dev); else lp->tx_full = 1; spin_unlock_irqrestore (&lp->devlock, flags); return 0; } struct net_device_stats *lance_get_stats (struct net_device *dev) { struct lance_private *lp = netdev_priv(dev); return &lp->stats; } /* taken from the depca driver via a2065.c */ static void lance_load_multicast (struct net_device *dev) { struct lance_private *lp = netdev_priv(dev); volatile struct lance_init_block *ib = lp->init_block; volatile u16 *mcast_table = (u16 *)&ib->filter; struct dev_mc_list *dmi=dev->mc_list; char *addrs; int i; u32 crc; /* set all multicast bits */ if (dev->flags & IFF_ALLMULTI){ ib->filter [0] = 0xffffffff; ib->filter [1] = 0xffffffff; return; } /* clear the multicast filter */ ib->filter [0] = 0; ib->filter [1] = 0; /* Add addresses */ for (i = 0; i < dev->mc_count; i++){ addrs = dmi->dmi_addr; dmi = dmi->next; /* multicast address? */ if (!(*addrs & 1)) continue; crc = ether_crc_le(6, addrs); crc = crc >> 26; mcast_table [crc >> 4] |= 1 << (crc & 0xf); } return; } void lance_set_multicast (struct net_device *dev) { struct lance_private *lp = netdev_priv(dev); volatile struct lance_init_block *ib = lp->init_block; int stopped; stopped = netif_queue_stopped(dev); if (!stopped) netif_stop_queue (dev); while (lp->tx_old != lp->tx_new) schedule(); WRITERAP(lp, LE_CSR0); WRITERDP(lp, LE_C0_STOP); lance_init_ring (dev); if (dev->flags & IFF_PROMISC) { ib->mode |= LE_MO_PROM; } else { ib->mode &= ~LE_MO_PROM; lance_load_multicast (dev); } load_csrs (lp); init_restart_lance (lp); if (!stopped) netif_start_queue (dev); } #ifdef CONFIG_NET_POLL_CONTROLLER void lance_poll(struct net_device *dev) { struct lance_private *lp = netdev_priv(dev); spin_lock (&lp->devlock); WRITERAP(lp, LE_CSR0); WRITERDP(lp, LE_C0_STRT); spin_unlock (&lp->devlock); lance_interrupt(dev->irq, dev); } #endif MODULE_LICENSE("GPL"); |