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

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