LXR linux/drivers/net/ethernet/amd/7990.c

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * 7990.c -- LANCE ethernet IC generic routines.
   4 * This is an attempt to separate out the bits of various ethernet
   5 * drivers that are common because they all use the AMD 7990 LANCE
   6 * (Local Area Network Controller for Ethernet) chip.
   7 *
   8 * Copyright (C) 05/1998 Peter Maydell <pmaydell@chiark.greenend.org.uk>
   9 *
  10 * Most of this stuff was obtained by looking at other LANCE drivers,
  11 * in particular a2065.[ch]. The AMD C-LANCE datasheet was also helpful.
  12 * NB: this was made easy by the fact that Jes Sorensen had cleaned up
  13 * most of a2025 and sunlance with the aim of merging them, so the
  14 * common code was pretty obvious.
  15 */
  16#include <linux/crc32.h>
  17#include <linux/delay.h>
  18#include <linux/errno.h>
  19#include <linux/netdevice.h>
  20#include <linux/etherdevice.h>
  21#include <linux/module.h>
  22#include <linux/kernel.h>
  23#include <linux/types.h>
  24#include <linux/fcntl.h>
  25#include <linux/interrupt.h>
  26#include <linux/ioport.h>
  27#include <linux/in.h>
  28#include <linux/route.h>
  29#include <linux/string.h>
  30#include <linux/skbuff.h>
  31#include <asm/irq.h>
  32/* Used for the temporal inet entries and routing */
  33#include <linux/socket.h>
  34#include <linux/bitops.h>
  35
  36#include <asm/io.h>
  37#include <asm/dma.h>
  38#include <asm/pgtable.h>
  39#ifdef CONFIG_HP300
  40#include <asm/blinken.h>
  41#endif
  42
  43#include "7990.h"
  44
  45#define WRITERAP(lp, x) out_be16(lp->base + LANCE_RAP, (x))
  46#define WRITERDP(lp, x) out_be16(lp->base + LANCE_RDP, (x))
  47#define READRDP(lp)     in_be16(lp->base + LANCE_RDP)
  48
  49#if IS_ENABLED(CONFIG_HPLANCE)
  50#include "hplance.h"
  51
  52#undef WRITERAP
  53#undef WRITERDP
  54#undef READRDP
  55
  56#if IS_ENABLED(CONFIG_MVME147_NET)
  57
  58/* Lossage Factor Nine, Mr Sulu. */
  59#define WRITERAP(lp, x) (lp->writerap(lp, x))
  60#define WRITERDP(lp, x) (lp->writerdp(lp, x))
  61#define READRDP(lp)     (lp->readrdp(lp))
  62
  63#else
  64
  65/* These inlines can be used if only CONFIG_HPLANCE is defined */
  66static inline void WRITERAP(struct lance_private *lp, __u16 value)
  67{
  68        do {
  69                out_be16(lp->base + HPLANCE_REGOFF + LANCE_RAP, value);
  70        } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
  71}
  72
  73static inline void WRITERDP(struct lance_private *lp, __u16 value)
  74{
  75        do {
  76                out_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP, value);
  77        } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
  78}
  79
  80static inline __u16 READRDP(struct lance_private *lp)
  81{
  82        __u16 value;
  83        do {
  84                value = in_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP);
  85        } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
  86        return value;
  87}
  88
  89#endif
  90#endif /* IS_ENABLED(CONFIG_HPLANCE) */
  91
  92/* debugging output macros, various flavours */
  93/* #define TEST_HITS */
  94#ifdef UNDEF
  95#define PRINT_RINGS() \
  96do { \
  97        int t; \
  98        for (t = 0; t < RX_RING_SIZE; t++) { \
  99                printk("R%d: @(%02X %04X) len %04X, mblen %04X, bits %02X\n", \
 100                       t, ib->brx_ring[t].rmd1_hadr, ib->brx_ring[t].rmd0, \
 101                       ib->brx_ring[t].length, \
 102                       ib->brx_ring[t].mblength, ib->brx_ring[t].rmd1_bits); \
 103        } \
 104        for (t = 0; t < TX_RING_SIZE; t++) { \
 105                printk("T%d: @(%02X %04X) len %04X, misc %04X, bits %02X\n", \
 106                       t, ib->btx_ring[t].tmd1_hadr, ib->btx_ring[t].tmd0, \
 107                       ib->btx_ring[t].length, \
 108                       ib->btx_ring[t].misc, ib->btx_ring[t].tmd1_bits); \
 109        } \
 110} while (0)
 111#else
 112#define PRINT_RINGS()
 113#endif
 114
 115/* Load the CSR registers. The LANCE has to be STOPped when we do this! */
 116static void load_csrs(struct lance_private *lp)
 117{
 118        volatile struct lance_init_block *aib = lp->lance_init_block;
 119        int leptr;
 120
 121        leptr = LANCE_ADDR(aib);
 122
 123        WRITERAP(lp, LE_CSR1);                    /* load address of init block */
 124        WRITERDP(lp, leptr & 0xFFFF);
 125        WRITERAP(lp, LE_CSR2);
 126        WRITERDP(lp, leptr >> 16);
 127        WRITERAP(lp, LE_CSR3);
 128        WRITERDP(lp, lp->busmaster_regval);       /* set byteswap/ALEctrl/byte ctrl */
 129
 130        /* Point back to csr0 */
 131        WRITERAP(lp, LE_CSR0);
 132}
 133
 134/* #define to 0 or 1 appropriately */
 135#define DEBUG_IRING 0
 136/* Set up the Lance Rx and Tx rings and the init block */
 137static void lance_init_ring(struct net_device *dev)
 138{
 139        struct lance_private *lp = netdev_priv(dev);
 140        volatile struct lance_init_block *ib = lp->init_block;
 141        volatile struct lance_init_block *aib; /* for LANCE_ADDR computations */
 142        int leptr;
 143        int i;
 144
 145        aib = lp->lance_init_block;
 146
 147        lp->rx_new = lp->tx_new = 0;
 148        lp->rx_old = lp->tx_old = 0;
 149
 150        ib->mode = LE_MO_PROM;                             /* normal, enable Tx & Rx */
 151
 152        /* Copy the ethernet address to the lance init block
 153         * Notice that we do a byteswap if we're big endian.
 154         * [I think this is the right criterion; at least, sunlance,
 155         * a2065 and atarilance do the byteswap and lance.c (PC) doesn't.
 156         * However, the datasheet says that the BSWAP bit doesn't affect
 157         * the init block, so surely it should be low byte first for
 158         * everybody? Um.]
 159         * We could define the ib->physaddr as three 16bit values and
 160         * use (addr[1] << 8) | addr[0] & co, but this is more efficient.
 161         */
 162#ifdef __BIG_ENDIAN
 163        ib->phys_addr[0] = dev->dev_addr[1];
 164        ib->phys_addr[1] = dev->dev_addr[0];
 165        ib->phys_addr[2] = dev->dev_addr[3];
 166        ib->phys_addr[3] = dev->dev_addr[2];
 167        ib->phys_addr[4] = dev->dev_addr[5];
 168        ib->phys_addr[5] = dev->dev_addr[4];
 169#else
 170        for (i = 0; i < 6; i++)
 171               ib->phys_addr[i] = dev->dev_addr[i];
 172#endif
 173
 174        if (DEBUG_IRING)
 175                printk("TX rings:\n");
 176
 177        lp->tx_full = 0;
 178        /* Setup the Tx ring entries */
 179        for (i = 0; i < (1 << lp->lance_log_tx_bufs); i++) {
 180                leptr = LANCE_ADDR(&aib->tx_buf[i][0]);
 181                ib->btx_ring[i].tmd0      = leptr;
 182                ib->btx_ring[i].tmd1_hadr = leptr >> 16;
 183                ib->btx_ring[i].tmd1_bits = 0;
 184                ib->btx_ring[i].length    = 0xf000; /* The ones required by tmd2 */
 185                ib->btx_ring[i].misc      = 0;
 186                if (DEBUG_IRING)
 187                        printk("%d: 0x%8.8x\n", i, leptr);
 188        }
 189
 190        /* Setup the Rx ring entries */
 191        if (DEBUG_IRING)
 192                printk("RX rings:\n");
 193        for (i = 0; i < (1 << lp->lance_log_rx_bufs); i++) {
 194                leptr = LANCE_ADDR(&aib->rx_buf[i][0]);
 195
 196                ib->brx_ring[i].rmd0      = leptr;
 197                ib->brx_ring[i].rmd1_hadr = leptr >> 16;
 198                ib->brx_ring[i].rmd1_bits = LE_R1_OWN;
 199                /* 0xf000 == bits that must be one (reserved, presumably) */
 200                ib->brx_ring[i].length    = -RX_BUFF_SIZE | 0xf000;
 201                ib->brx_ring[i].mblength  = 0;
 202                if (DEBUG_IRING)
 203                        printk("%d: 0x%8.8x\n", i, leptr);
 204        }
 205
 206        /* Setup the initialization block */
 207
 208        /* Setup rx descriptor pointer */
 209        leptr = LANCE_ADDR(&aib->brx_ring);
 210        ib->rx_len = (lp->lance_log_rx_bufs << 13) | (leptr >> 16);
 211        ib->rx_ptr = leptr;
 212        if (DEBUG_IRING)
 213                printk("RX ptr: %8.8x\n", leptr);
 214
 215        /* Setup tx descriptor pointer */
 216        leptr = LANCE_ADDR(&aib->btx_ring);
 217        ib->tx_len = (lp->lance_log_tx_bufs << 13) | (leptr >> 16);
 218        ib->tx_ptr = leptr;
 219        if (DEBUG_IRING)
 220                printk("TX ptr: %8.8x\n", leptr);
 221
 222        /* Clear the multicast filter */
 223        ib->filter[0] = 0;
 224        ib->filter[1] = 0;
 225        PRINT_RINGS();
 226}
 227
 228/* LANCE must be STOPped before we do this, too... */
 229static int init_restart_lance(struct lance_private *lp)
 230{
 231        int i;
 232
 233        WRITERAP(lp, LE_CSR0);
 234        WRITERDP(lp, LE_C0_INIT);
 235
 236        /* Need a hook here for sunlance ledma stuff */
 237
 238        /* Wait for the lance to complete initialization */
 239        for (i = 0; (i < 100) && !(READRDP(lp) & (LE_C0_ERR | LE_C0_IDON)); i++)
 240                barrier();
 241        if ((i == 100) || (READRDP(lp) & LE_C0_ERR)) {
 242                printk("LANCE unopened after %d ticks, csr0=%4.4x.\n", i, READRDP(lp));
 243                return -1;
 244        }
 245
 246        /* Clear IDON by writing a "1", enable interrupts and start lance */
 247        WRITERDP(lp, LE_C0_IDON);
 248        WRITERDP(lp, LE_C0_INEA | LE_C0_STRT);
 249
 250        return 0;
 251}
 252
 253static int lance_reset(struct net_device *dev)
 254{
 255        struct lance_private *lp = netdev_priv(dev);
 256        int status;
 257
 258        /* Stop the lance */
 259        WRITERAP(lp, LE_CSR0);
 260        WRITERDP(lp, LE_C0_STOP);
 261
 262        load_csrs(lp);
 263        lance_init_ring(dev);
 264        netif_trans_update(dev); /* prevent tx timeout */
 265        status = init_restart_lance(lp);
 266#ifdef DEBUG_DRIVER
 267        printk("Lance restart=%d\n", status);
 268#endif
 269        return status;
 270}
 271
 272static int lance_rx(struct net_device *dev)
 273{
 274        struct lance_private *lp = netdev_priv(dev);
 275        volatile struct lance_init_block *ib = lp->init_block;
 276        volatile struct lance_rx_desc *rd;
 277        unsigned char bits;
 278#ifdef TEST_HITS
 279        int i;
 280#endif
 281
 282#ifdef TEST_HITS
 283        printk("[");
 284        for (i = 0; i < RX_RING_SIZE; i++) {
 285                if (i == lp->rx_new)
 286                        printk("%s",
 287                               ib->brx_ring[i].rmd1_bits & LE_R1_OWN ? "_" : "X");
 288                else
 289                        printk("%s",
 290                              ib->brx_ring[i].rmd1_bits & LE_R1_OWN ? "." : "1");
 291        }
 292        printk("]");
 293#endif
 294#ifdef CONFIG_HP300
 295        blinken_leds(0x40, 0);
 296#endif
 297        WRITERDP(lp, LE_C0_RINT | LE_C0_INEA);     /* ack Rx int, reenable ints */
 298        for (rd = &ib->brx_ring[lp->rx_new];     /* For each Rx ring we own... */
 299             !((bits = rd->rmd1_bits) & LE_R1_OWN);
 300             rd = &ib->brx_ring[lp->rx_new]) {
 301
 302                /* We got an incomplete frame? */
 303                if ((bits & LE_R1_POK) != LE_R1_POK) {
 304                        dev->stats.rx_over_errors++;
 305                        dev->stats.rx_errors++;
 306                        continue;
 307                } else if (bits & LE_R1_ERR) {
 308                        /* Count only the end frame as a rx error,
 309                         * not the beginning
 310                         */
 311                        if (bits & LE_R1_BUF)
 312                                dev->stats.rx_fifo_errors++;
 313                        if (bits & LE_R1_CRC)
 314                                dev->stats.rx_crc_errors++;
 315                        if (bits & LE_R1_OFL)
 316                                dev->stats.rx_over_errors++;
 317                        if (bits & LE_R1_FRA)
 318                                dev->stats.rx_frame_errors++;
 319                        if (bits & LE_R1_EOP)
 320                                dev->stats.rx_errors++;
 321                } else {
 322                        int len = (rd->mblength & 0xfff) - 4;
 323                        struct sk_buff *skb = netdev_alloc_skb(dev, len + 2);
 324
 325                        if (!skb) {
 326                                dev->stats.rx_dropped++;
 327                                rd->mblength = 0;
 328                                rd->rmd1_bits = LE_R1_OWN;
 329                                lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask;
 330                                return 0;
 331                        }
 332
 333                        skb_reserve(skb, 2);           /* 16 byte align */
 334                        skb_put(skb, len);             /* make room */
 335                        skb_copy_to_linear_data(skb,
 336                                         (unsigned char *)&(ib->rx_buf[lp->rx_new][0]),
 337                                         len);
 338                        skb->protocol = eth_type_trans(skb, dev);
 339                        netif_rx(skb);
 340                        dev->stats.rx_packets++;
 341                        dev->stats.rx_bytes += len;
 342                }
 343
 344                /* Return the packet to the pool */
 345                rd->mblength = 0;
 346                rd->rmd1_bits = LE_R1_OWN;
 347                lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask;
 348        }
 349        return 0;
 350}
 351
 352static int lance_tx(struct net_device *dev)
 353{
 354        struct lance_private *lp = netdev_priv(dev);
 355        volatile struct lance_init_block *ib = lp->init_block;
 356        volatile struct lance_tx_desc *td;
 357        int i, j;
 358        int status;
 359
 360#ifdef CONFIG_HP300
 361        blinken_leds(0x80, 0);
 362#endif
 363        /* csr0 is 2f3 */
 364        WRITERDP(lp, LE_C0_TINT | LE_C0_INEA);
 365        /* csr0 is 73 */
 366
 367        j = lp->tx_old;
 368        for (i = j; i != lp->tx_new; i = j) {
 369                td = &ib->btx_ring[i];
 370
 371                /* If we hit a packet not owned by us, stop */
 372                if (td->tmd1_bits & LE_T1_OWN)
 373                        break;
 374
 375                if (td->tmd1_bits & LE_T1_ERR) {
 376                        status = td->misc;
 377
 378                        dev->stats.tx_errors++;
 379                        if (status & LE_T3_RTY)
 380                                dev->stats.tx_aborted_errors++;
 381                        if (status & LE_T3_LCOL)
 382                                dev->stats.tx_window_errors++;
 383
 384                        if (status & LE_T3_CLOS) {
 385                                dev->stats.tx_carrier_errors++;
 386                                if (lp->auto_select) {
 387                                        lp->tpe = 1 - lp->tpe;
 388                                        printk("%s: Carrier Lost, trying %s\n",
 389                                               dev->name,
 390                                               lp->tpe ? "TPE" : "AUI");
 391                                        /* Stop the lance */
 392                                        WRITERAP(lp, LE_CSR0);
 393                                        WRITERDP(lp, LE_C0_STOP);
 394                                        lance_init_ring(dev);
 395                                        load_csrs(lp);
 396                                        init_restart_lance(lp);
 397                                        return 0;
 398                                }
 399                        }
 400
 401                        /* buffer errors and underflows turn off the transmitter */
 402                        /* Restart the adapter */
 403                        if (status & (LE_T3_BUF|LE_T3_UFL)) {
 404                                dev->stats.tx_fifo_errors++;
 405
 406                                printk("%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
 407                                       dev->name);
 408                                /* Stop the lance */
 409                                WRITERAP(lp, LE_CSR0);
 410                                WRITERDP(lp, LE_C0_STOP);
 411                                lance_init_ring(dev);
 412                                load_csrs(lp);
 413                                init_restart_lance(lp);
 414                                return 0;
 415                        }
 416                } else if ((td->tmd1_bits & LE_T1_POK) == LE_T1_POK) {
 417                        /*
 418                         * So we don't count the packet more than once.
 419                         */
 420                        td->tmd1_bits &= ~(LE_T1_POK);
 421
 422                        /* One collision before packet was sent. */
 423                        if (td->tmd1_bits & LE_T1_EONE)
 424                                dev->stats.collisions++;
 425
 426                        /* More than one collision, be optimistic. */
 427                        if (td->tmd1_bits & LE_T1_EMORE)
 428                                dev->stats.collisions += 2;
 429
 430                        dev->stats.tx_packets++;
 431                }
 432
 433                j = (j + 1) & lp->tx_ring_mod_mask;
 434        }
 435        lp->tx_old = j;
 436        WRITERDP(lp, LE_C0_TINT | LE_C0_INEA);
 437        return 0;
 438}
 439
 440static irqreturn_t
 441lance_interrupt(int irq, void *dev_id)
 442{
 443        struct net_device *dev = (struct net_device *)dev_id;
 444        struct lance_private *lp = netdev_priv(dev);
 445        int csr0;
 446
 447        spin_lock(&lp->devlock);
 448
 449        WRITERAP(lp, LE_CSR0);              /* LANCE Controller Status */
 450        csr0 = READRDP(lp);
 451
 452        PRINT_RINGS();
 453
 454        if (!(csr0 & LE_C0_INTR)) {     /* Check if any interrupt has */
 455                spin_unlock(&lp->devlock);
 456                return IRQ_NONE;        /* been generated by the Lance. */
 457        }
 458
 459        /* Acknowledge all the interrupt sources ASAP */
 460        WRITERDP(lp, csr0 & ~(LE_C0_INEA|LE_C0_TDMD|LE_C0_STOP|LE_C0_STRT|LE_C0_INIT));
 461
 462        if ((csr0 & LE_C0_ERR)) {
 463                /* Clear the error condition */
 464                WRITERDP(lp, LE_C0_BABL|LE_C0_ERR|LE_C0_MISS|LE_C0_INEA);
 465        }
 466
 467        if (csr0 & LE_C0_RINT)
 468                lance_rx(dev);
 469
 470        if (csr0 & LE_C0_TINT)
 471                lance_tx(dev);
 472
 473        /* Log misc errors. */
 474        if (csr0 & LE_C0_BABL)
 475                dev->stats.tx_errors++;       /* Tx babble. */
 476        if (csr0 & LE_C0_MISS)
 477                dev->stats.rx_errors++;       /* Missed a Rx frame. */
 478        if (csr0 & LE_C0_MERR) {
 479                printk("%s: Bus master arbitration failure, status %4.4x.\n",
 480                       dev->name, csr0);
 481                /* Restart the chip. */
 482                WRITERDP(lp, LE_C0_STRT);
 483        }
 484
 485        if (lp->tx_full && netif_queue_stopped(dev) && (TX_BUFFS_AVAIL >= 0)) {
 486                lp->tx_full = 0;
 487                netif_wake_queue(dev);
 488        }
 489
 490        WRITERAP(lp, LE_CSR0);
 491        WRITERDP(lp, LE_C0_BABL|LE_C0_CERR|LE_C0_MISS|LE_C0_MERR|LE_C0_IDON|LE_C0_INEA);
 492
 493        spin_unlock(&lp->devlock);
 494        return IRQ_HANDLED;
 495}
 496
 497int lance_open(struct net_device *dev)
 498{
 499        struct lance_private *lp = netdev_priv(dev);
 500        int res;
 501
 502        /* Install the Interrupt handler. Or we could shunt this out to specific drivers? */
 503        if (request_irq(lp->irq, lance_interrupt, IRQF_SHARED, lp->name, dev))
 504                return -EAGAIN;
 505
 506        res = lance_reset(dev);
 507        spin_lock_init(&lp->devlock);
 508        netif_start_queue(dev);
 509
 510        return res;
 511}
 512EXPORT_SYMBOL_GPL(lance_open);
 513
 514int lance_close(struct net_device *dev)
 515{
 516        struct lance_private *lp = netdev_priv(dev);
 517
 518        netif_stop_queue(dev);
 519
 520        /* Stop the LANCE */
 521        WRITERAP(lp, LE_CSR0);
 522        WRITERDP(lp, LE_C0_STOP);
 523
 524        free_irq(lp->irq, dev);
 525
 526        return 0;
 527}
 528EXPORT_SYMBOL_GPL(lance_close);
 529
 530void lance_tx_timeout(struct net_device *dev)
 531{
 532        printk("lance_tx_timeout\n");
 533        lance_reset(dev);
 534        netif_trans_update(dev); /* prevent tx timeout */
 535        netif_wake_queue(dev);
 536}
 537EXPORT_SYMBOL_GPL(lance_tx_timeout);
 538
 539int lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
 540{
 541        struct lance_private *lp = netdev_priv(dev);
 542        volatile struct lance_init_block *ib = lp->init_block;
 543        int entry, skblen, len;
 544        static int outs;
 545        unsigned long flags;
 546
 547        netif_stop_queue(dev);
 548
 549        if (!TX_BUFFS_AVAIL) {
 550                dev_consume_skb_any(skb);
 551                return NETDEV_TX_OK;
 552        }
 553
 554        skblen = skb->len;
 555
 556#ifdef DEBUG_DRIVER
 557        /* dump the packet */
 558        {
 559                int i;
 560
 561                for (i = 0; i < 64; i++) {
 562                        if ((i % 16) == 0)
 563                                printk("\n");
 564                        printk("%2.2x ", skb->data[i]);
 565                }
 566        }
 567#endif
 568        len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;
 569        entry = lp->tx_new & lp->tx_ring_mod_mask;
 570        ib->btx_ring[entry].length = (-len) | 0xf000;
 571        ib->btx_ring[entry].misc = 0;
 572
 573        if (skb->len < ETH_ZLEN)
 574                memset((void *)&ib->tx_buf[entry][0], 0, ETH_ZLEN);
 575        skb_copy_from_linear_data(skb, (void *)&ib->tx_buf[entry][0], skblen);
 576
 577        /* Now, give the packet to the lance */
 578        ib->btx_ring[entry].tmd1_bits = (LE_T1_POK|LE_T1_OWN);
 579        lp->tx_new = (lp->tx_new + 1) & lp->tx_ring_mod_mask;
 580
 581        outs++;
 582        /* Kick the lance: transmit now */
 583        WRITERDP(lp, LE_C0_INEA | LE_C0_TDMD);
 584        dev_consume_skb_any(skb);
 585
 586        spin_lock_irqsave(&lp->devlock, flags);
 587        if (TX_BUFFS_AVAIL)
 588                netif_start_queue(dev);
 589        else
 590                lp->tx_full = 1;
 591        spin_unlock_irqrestore(&lp->devlock, flags);
 592
 593        return NETDEV_TX_OK;
 594}
 595EXPORT_SYMBOL_GPL(lance_start_xmit);
 596
 597/* taken from the depca driver via a2065.c */
 598static void lance_load_multicast(struct net_device *dev)
 599{
 600        struct lance_private *lp = netdev_priv(dev);
 601        volatile struct lance_init_block *ib = lp->init_block;
 602        volatile u16 *mcast_table = (u16 *)&ib->filter;
 603        struct netdev_hw_addr *ha;
 604        u32 crc;
 605
 606        /* set all multicast bits */
 607        if (dev->flags & IFF_ALLMULTI) {
 608                ib->filter[0] = 0xffffffff;
 609                ib->filter[1] = 0xffffffff;
 610                return;
 611        }
 612        /* clear the multicast filter */
 613        ib->filter[0] = 0;
 614        ib->filter[1] = 0;
 615
 616        /* Add addresses */
 617        netdev_for_each_mc_addr(ha, dev) {
 618                crc = ether_crc_le(6, ha->addr);
 619                crc = crc >> 26;
 620                mcast_table[crc >> 4] |= 1 << (crc & 0xf);
 621        }
 622}
 623
 624
 625void lance_set_multicast(struct net_device *dev)
 626{
 627        struct lance_private *lp = netdev_priv(dev);
 628        volatile struct lance_init_block *ib = lp->init_block;
 629        int stopped;
 630
 631        stopped = netif_queue_stopped(dev);
 632        if (!stopped)
 633                netif_stop_queue(dev);
 634
 635        while (lp->tx_old != lp->tx_new)
 636                schedule();
 637
 638        WRITERAP(lp, LE_CSR0);
 639        WRITERDP(lp, LE_C0_STOP);
 640        lance_init_ring(dev);
 641
 642        if (dev->flags & IFF_PROMISC) {
 643                ib->mode |= LE_MO_PROM;
 644        } else {
 645                ib->mode &= ~LE_MO_PROM;
 646                lance_load_multicast(dev);
 647        }
 648        load_csrs(lp);
 649        init_restart_lance(lp);
 650
 651        if (!stopped)
 652                netif_start_queue(dev);
 653}
 654EXPORT_SYMBOL_GPL(lance_set_multicast);
 655
 656#ifdef CONFIG_NET_POLL_CONTROLLER
 657void lance_poll(struct net_device *dev)
 658{
 659        struct lance_private *lp = netdev_priv(dev);
 660
 661        spin_lock(&lp->devlock);
 662        WRITERAP(lp, LE_CSR0);
 663        WRITERDP(lp, LE_C0_STRT);
 664        spin_unlock(&lp->devlock);
 665        lance_interrupt(dev->irq, dev);
 666}
 667EXPORT_SYMBOL_GPL(lance_poll);
 668#endif
 669
 670MODULE_LICENSE("GPL");
 671