drivers/net/ariadne.c

/* */
This source file includes following definitions.
memcpyw
ariadne_probe
ariadne_open
ariadne_init_ring
ariadne_close
ariadne_interrupt
ariadne_start_xmit
ariadne_rx
ariadne_get_stats
set_multicast_list
   1 /*
   2  *  Amiga Linux/m68k Ariadne Ethernet Driver
   3  *
   4  *  © Copyright 1995 by Geert Uytterhoeven
   5  *                     (Geert.Uytterhoeven@cs.kuleuven.ac.be)
   6  *                      Peter De Schrijver
   7  *                     (Peter.DeSchrijver@linux.cc.kuleuven.ac.be)
   8  *
   9  *  ----------------------------------------------------------------------------------
  10  *
  11  *  This program is based on
  12  *
  13  *      lance.c:        An AMD LANCE ethernet driver for linux.
  14  *                      Written 1993-94 by Donald Becker.
  15  *
  16  *      Am79C960:       PCnet(tm)-ISA Single-Chip Ethernet Controller
  17  *                      Advanced Micro Devices
  18  *                      Publication #16907, Rev. B, Amendment/0, May 1994
  19  *
  20  *      MC68230:        Parallel Interface/Timer (PI/T)
  21  *                      Motorola Semiconductors, December, 1983
  22  *
  23  *  ----------------------------------------------------------------------------------
  24  *
  25  *  This file is subject to the terms and conditions of the GNU General Public
  26  *  License.  See the file README.legal in the main directory of the Linux/m68k
  27  *  distribution for more details.
  28  *
  29  *  ----------------------------------------------------------------------------------
  30  *
  31  *  The Ariadne is a Zorro-II board made by Village Tronic. It contains:
  32  *
  33  *      - an Am79C960 PCnet-ISA Single-Chip Ethernet Controller with both
  34  *        10BASE-2 (thin coax) and 10BASE-T (UTP) connectors
  35  *
  36  *      - an MC68230 Parallel Interface/Timer configured as 2 parallel ports
  37  */
  38 
  39 #include <stddef.h>
  40 
  41 #include <linux/kernel.h>
  42 #include <linux/sched.h>
  43 #include <linux/string.h>
  44 #include <linux/ptrace.h>
  45 #include <linux/errno.h>
  46 #include <linux/ioport.h>
  47 #include <linux/malloc.h>
  48 #include <linux/netdevice.h>
  49 #include <linux/etherdevice.h>
  50 #include <linux/interrupt.h>
  51 #include <linux/skbuff.h>
  52 
  53 #include <asm/bitops.h>
  54 #include <asm/amigaints.h>
  55 #include <asm/amigahw.h>
  56 #include <asm/zorro.h>
  57 #include <asm/bootinfo.h>
  58 #include <asm/io.h>
  59 #include <asm/irq.h>
  60 
  61 #include "ariadne.h"
  62 
  63 
  64 #ifdef ARIADNE_DEBUG
  65 int ariadne_debug = ARIADNE_DEBUG;
  66 #else
  67 int ariadne_debug = 1;
  68 #endif
  69 
  70 
  71     /*
  72      *  Macros to Fix Endianness problems
  73      */
  74 
  75                                 /* Swap the Bytes in a WORD */
  76 #define swapw(x)        (((x>>8)&0x00ff)|((x<<8)&0xff00))
  77                                 /* Get the Low BYTE in a WORD */
  78 #define lowb(x)         (x&0xff)
  79                                 /* Get the Swapped High WORD in a LONG */
  80 #define swhighw(x)      ((((x)>>8)&0xff00)|(((x)>>24)&0x00ff))
  81                                 /* Get the Swapped Low WORD in a LONG */
  82 #define swloww(x)       ((((x)<<8)&0xff00)|(((x)>>8)&0x00ff))
  83 
  84 
  85     /*
  86      *  Transmit/Receive Ring Definitions
  87      */
  88 
  89 #define TX_RING_SIZE    5
  90 #define RX_RING_SIZE    16
  91 
  92 #define PKT_BUF_SIZE    1520
  93 
  94 
  95     /*
  96      *  Private Device Data
  97      */
  98 
  99 struct ariadne_private {
 100     struct AriadneBoard *board;
 101     struct TDRE *tx_ring[TX_RING_SIZE];
 102     struct RDRE *rx_ring[RX_RING_SIZE];
 103     u_short *tx_buff[TX_RING_SIZE];
 104     u_short *rx_buff[RX_RING_SIZE];
 105     int cur_tx, cur_rx;                 /* The next free ring entry */
 106     int dirty_tx;                       /* The ring entries to be free()ed. */
 107     struct enet_statistics stats;
 108     char tx_full;
 109     unsigned long lock;
 110 };
 111 
 112 
 113     /*
 114      *  Structure Created in the Ariadne's RAM Buffer
 115      */
 116 
 117 struct lancedata {
 118     struct TDRE tx_ring[TX_RING_SIZE];
 119     struct RDRE rx_ring[RX_RING_SIZE];
 120     u_short tx_buff[TX_RING_SIZE][PKT_BUF_SIZE/sizeof(u_short)];
 121     u_short rx_buff[RX_RING_SIZE][PKT_BUF_SIZE/sizeof(u_short)];
 122 };
 123 
 124 
 125 static int ariadne_open(struct device *dev);
 126 static void ariadne_init_ring(struct device *dev);
 127 static int ariadne_start_xmit(struct sk_buff *skb, struct device *dev);
 128 static int ariadne_rx(struct device *dev);
 129 static void ariadne_interrupt(int irq, struct pt_regs *fp, void *data);
 130 static int ariadne_close(struct device *dev);
 131 static struct enet_statistics *ariadne_get_stats(struct device *dev);
 132 #ifdef HAVE_MULTICAST
 133 static void set_multicast_list(struct device *dev);
 134 #endif
 135 
 136 
 137 static void memcpyw(u_short *dest, u_short *src, int len)
     /*  */
 138 {
 139     while (len >= 2) {
 140         *(dest++) = *(src++);
 141         len -= 2;
 142     }
 143     if (len == 1)
 144         *dest = (*(u_char *)src)<<8;
 145 }
 146 
 147 
 148 int long ariadne_probe(struct device *dev)
     /*  */
 149 {
 150     int key;
 151     struct ConfigDev *cd;
 152     u_long board;
 153     struct ariadne_private *priv;
 154 
 155     /* Ethernet is part 0, Parallel is part 1 */
 156     if ((key = zorro_find(MANUF_VILLAGE_TRONIC, PROD_ARIADNE, 0, 0))) {
 157         cd = zorro_get_board(key);
 158         if ((board = (u_long)cd->cd_BoardAddr)) {
 159             dev->dev_addr[0] = 0x00;
 160             dev->dev_addr[1] = 0x60;
 161             dev->dev_addr[2] = 0x30;
 162             dev->dev_addr[3] = (cd->cd_Rom.er_SerialNumber>>16)&0xff;
 163             dev->dev_addr[4] = (cd->cd_Rom.er_SerialNumber>>8)&0xff;
 164             dev->dev_addr[5] = cd->cd_Rom.er_SerialNumber&0xff;
 165             printk("%s: Ariadne at 0x%08lx, Ethernet Address "
 166                    "%02x:%02x:%02x:%02x:%02x:%02x\n", dev->name, board,
 167                    dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
 168                    dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
 169 
 170             init_etherdev(dev, 0);
 171 
 172             dev->priv = kmalloc(sizeof(struct ariadne_private), GFP_KERNEL);
 173             priv = (struct ariadne_private *)dev->priv;
 174             memset(priv, 0, sizeof(struct ariadne_private));
 175 
 176             priv->board = (struct AriadneBoard *)ZTWO_VADDR(board);
 177 
 178             dev->open = &ariadne_open;
 179             dev->stop = &ariadne_close;
 180             dev->hard_start_xmit = &ariadne_start_xmit;
 181             dev->get_stats = &ariadne_get_stats;
 182             dev->set_multicast_list = &set_multicast_list;
 183 
 184             zorro_config_board(key, 0);
 185             return(0);
 186         }
 187     }
 188     return(ENODEV);
 189 }
 190 
 191 
 192 static int ariadne_open(struct device *dev)
     /*  */
 193 {
 194     struct ariadne_private *priv = (struct ariadne_private *)dev->priv;
 195     struct AriadneBoard *board = priv->board;
 196     static int interruptinstalled = 0;
 197     struct lancedata *lancedata;
 198     u_short in;
 199     u_long version;
 200 
 201     /* Reset the LANCE */
 202     in = board->Lance.Reset;
 203 
 204     /* Stop the LANCE */
 205     board->Lance.RAP = CSR0;    /* PCnet-ISA Controller Status */
 206     board->Lance.RDP = STOP;
 207 
 208     /* Check the LANCE version */
 209     board->Lance.RAP = CSR88;   /* Chip ID */
 210     version = swapw(board->Lance.RDP);
 211     board->Lance.RAP = CSR89;   /* Chip ID */
 212     version |= swapw(board->Lance.RDP)<<16;
 213     if ((version & 0x00000fff) != 0x00000003) {
 214         printk("ariadne_open: Couldn't find AMD Ethernet Chip\n");
 215         return(-EAGAIN);
 216     }
 217     if ((version & 0x0ffff000) != 0x00003000) {
 218         printk("ariadne_open: Couldn't find Am79C960 (Wrong part number = %ld)\n",
 219                (version & 0x0ffff000)>>12);
 220         return(-EAGAIN);
 221     }
 222 #if 0
 223     printk("ariadne_open: Am79C960 (PCnet-ISA) Revision %ld\n",
 224            (version & 0xf0000000)>>28);
 225 #endif
 226 
 227     ariadne_init_ring(dev);
 228 
 229     /* Miscellaneous Stuff */
 230     board->Lance.RAP = CSR3;    /* Interrupt Masks and Deferral Control */
 231     board->Lance.RDP = 0x0000;
 232     board->Lance.RAP = CSR4;    /* Test and Features Control */
 233     board->Lance.RDP = DPOLL|APAD_XMT|MFCOM|RCVCCOM|TXSTRTM|JABM;
 234 
 235     /* Set the Multicast Table */
 236     board->Lance.RAP = CSR8;    /* Logical Address Filter, LADRF[15:0] */
 237     board->Lance.RDP = 0x0000;
 238     board->Lance.RAP = CSR9;    /* Logical Address Filter, LADRF[31:16] */
 239     board->Lance.RDP = 0x0000;
 240     board->Lance.RAP = CSR10;   /* Logical Address Filter, LADRF[47:32] */
 241     board->Lance.RDP = 0x0000;
 242     board->Lance.RAP = CSR11;   /* Logical Address Filter, LADRF[63:48] */
 243     board->Lance.RDP = 0x0000;
 244 
 245     /* Set the Ethernet Hardware Address */
 246     board->Lance.RAP = CSR12;   /* Physical Address Register, PADR[15:0] */
 247     board->Lance.RDP = ((u_short *)&dev->dev_addr[0])[0];
 248     board->Lance.RAP = CSR13;   /* Physical Address Register, PADR[31:16] */
 249     board->Lance.RDP = ((u_short *)&dev->dev_addr[0])[1];
 250     board->Lance.RAP = CSR14;   /* Physical Address Register, PADR[47:32] */
 251     board->Lance.RDP = ((u_short *)&dev->dev_addr[0])[2];
 252 
 253     /* Set the Init Block Mode */
 254     board->Lance.RAP = CSR15;   /* Mode Register */
 255     board->Lance.RDP = 0x0000;
 256 
 257     lancedata = (struct lancedata *)offsetof(struct AriadneBoard, RAM);
 258 
 259     /* Set the Transmit Descriptor Ring Pointer */
 260     board->Lance.RAP = CSR30;   /* Base Address of Transmit Ring */
 261     board->Lance.RDP = swloww((u_long)&lancedata->tx_ring);
 262     board->Lance.RAP = CSR31;   /* Base Address of transmit Ring */
 263     board->Lance.RDP = swhighw((u_long)&lancedata->tx_ring);
 264 
 265     /* Set the Receive Descriptor Ring Pointer */
 266     board->Lance.RAP = CSR24;   /* Base Address of Receive Ring */
 267     board->Lance.RDP = swloww((u_long)&lancedata->rx_ring);
 268     board->Lance.RAP = CSR25;   /* Base Address of Receive Ring */
 269     board->Lance.RDP = swhighw((u_long)&lancedata->rx_ring);
 270 
 271     /* Set the Number of RX and TX Ring Entries */
 272     board->Lance.RAP = CSR76;   /* Receive Ring Length */
 273     board->Lance.RDP = swapw(((u_short)-RX_RING_SIZE));
 274     board->Lance.RAP = CSR78;   /* Transmit Ring Length */
 275     board->Lance.RDP = swapw(((u_short)-TX_RING_SIZE));
 276 
 277     /* Enable Media Interface Port Auto Select (10BASE-2/10BASE-T) */
 278     board->Lance.RAP = ISACSR2; /* Miscellaneous Configuration */
 279     board->Lance.IDP = ASEL;
 280 
 281     /* LED Control */
 282     board->Lance.RAP = ISACSR5; /* LED1 Status */
 283     board->Lance.IDP = PSE|XMTE;
 284     board->Lance.RAP = ISACSR6; /* LED2 Status */
 285     board->Lance.IDP = PSE|COLE;
 286     board->Lance.RAP = ISACSR7; /* LED3 Status */
 287     board->Lance.IDP = PSE|RCVE;
 288 
 289     dev->tbusy = 0;
 290     dev->interrupt = 0;
 291     dev->start = 1;
 292 
 293     if (!interruptinstalled) {
 294         if (!add_isr(IRQ_AMIGA_PORTS, ariadne_interrupt, 0, dev,
 295                      "Ariadne Ethernet"))
 296             return(-EAGAIN);
 297         interruptinstalled = 1;
 298     }
 299 
 300     board->Lance.RAP = CSR0;    /* PCnet-ISA Controller Status */
 301     board->Lance.RDP = INEA|STRT;
 302 
 303     return(0);
 304 }
 305 
 306 
 307 static void ariadne_init_ring(struct device *dev)
     /*  */
 308 {
 309     struct ariadne_private *priv = (struct ariadne_private *)dev->priv;
 310     struct AriadneBoard *board = priv->board;
 311     struct lancedata *lancedata;        /* LANCE point of view */
 312     struct lancedata *alancedata;       /* Amiga point of view */
 313     int i;
 314 
 315     priv->lock = 0, priv->tx_full = 0;
 316     priv->cur_rx = priv->cur_tx = 0;
 317     priv->dirty_tx = 0;
 318 
 319     lancedata = (struct lancedata *)offsetof(struct AriadneBoard, RAM);
 320     alancedata = (struct lancedata *)board->RAM;
 321 
 322     /* Set up TX Ring */
 323     for (i = 0; i < TX_RING_SIZE; i++) {
 324         alancedata->tx_ring[i].TMD0 = swloww((u_long)lancedata->tx_buff[i]);
 325         alancedata->tx_ring[i].TMD1 = swhighw((u_long)lancedata->tx_buff[i])|TF_STP|TF_ENP;
 326         alancedata->tx_ring[i].TMD2 = swapw((u_short)-PKT_BUF_SIZE);
 327         alancedata->tx_ring[i].TMD3 = 0;
 328         priv->tx_ring[i] = &alancedata->tx_ring[i];
 329         priv->tx_buff[i] = alancedata->tx_buff[i];
 330 #if 0
 331         printk("TX Entry %2d @ 0x%08x (LANCE 0x%08x), Buf @ 0x%08x (LANCE 0x%08x)\n",
 332                i, (int)&alancedata->tx_ring[i], (int)&lancedata->tx_ring[i],
 333                (int)alancedata->tx_buff[i], (int)lancedata->tx_buff[i]);
 334 #endif
 335     }
 336 
 337     /* Set up RX Ring */
 338     for (i = 0; i < RX_RING_SIZE; i++) {
 339         alancedata->rx_ring[i].RMD0 = swloww((u_long)lancedata->rx_buff[i]);
 340         alancedata->rx_ring[i].RMD1 = swhighw((u_long)lancedata->rx_buff[i])|RF_OWN;
 341         alancedata->rx_ring[i].RMD2 = swapw((u_short)-PKT_BUF_SIZE);
 342         alancedata->rx_ring[i].RMD3 = 0x0000;
 343         priv->rx_ring[i] = &alancedata->rx_ring[i];
 344         priv->rx_buff[i] = alancedata->rx_buff[i];
 345 #if 0
 346         printk("RX Entry %2d @ 0x%08x (LANCE 0x%08x), Buf @ 0x%08x (LANCE 0x%08x)\n",
 347                i, (int)&alancedata->rx_ring[i], (int)&lancedata->rx_ring[i],
 348                (int)alancedata->rx_buff[i], (int)lancedata->rx_buff[i]);
 349 #endif
 350     }
 351 }
 352 
 353 
 354 static int ariadne_close(struct device *dev)
     /*  */
 355 {
 356     struct ariadne_private *priv = (struct ariadne_private *)dev->priv;
 357     struct AriadneBoard *board = priv->board;
 358 
 359     dev->start = 0;
 360     dev->tbusy = 1;
 361 
 362     board->Lance.RAP = CSR112;  /* Missed Frame Count */
 363     priv->stats.rx_missed_errors = swapw(board->Lance.RDP);
 364     board->Lance.RAP = CSR0;    /* PCnet-ISA Controller Status */
 365 
 366     if (ariadne_debug > 1) {
 367         printk("%s: Shutting down ethercard, status was %2.2x.\n", dev->name,
 368                board->Lance.RDP);
 369         printk("%s: %d packets missed\n", dev->name,
 370                priv->stats.rx_missed_errors);
 371     }
 372 
 373     /* We stop the LANCE here -- it occasionally polls memory if we don't. */
 374     board->Lance.RDP = STOP;
 375 
 376     return(0);
 377 }
 378 
 379 
 380 static void ariadne_interrupt(int irq, struct pt_regs *fp, void *data)
     /*  */
 381 {
 382     struct device *dev = (struct device *)data;
 383     struct ariadne_private *priv;
 384     struct AriadneBoard *board;
 385     int csr0, boguscnt = 10;
 386 
 387     if (dev == NULL) {
 388         printk("ariadne_interrupt(): irq for unknown device.\n");
 389         return;
 390     }
 391 
 392     priv = (struct ariadne_private *)dev->priv;
 393     board = priv->board;
 394 
 395     board->Lance.RAP = CSR0;    /* PCnet-ISA Controller Status */
 396 
 397     if (!(board->Lance.RDP & INTR))     /* Check if any interrupt has been
 398         return;                            generated by the board. */
 399 
 400     if (dev->interrupt)
 401         printk("%s: Re-entering the interrupt handler.\n", dev->name);
 402 
 403     dev->interrupt = 1;
 404 
 405     while ((csr0 = board->Lance.RDP) & (ERR|RINT|TINT) && --boguscnt >= 0) {
 406         /* Acknowledge all of the current interrupt sources ASAP. */
 407         board->Lance.RDP = csr0 & ~(INEA|TDMD|STOP|STRT|INIT);
 408 
 409 #if 0
 410         if (ariadne_debug > 5) {
 411             printk("%s: interrupt  csr0=%#2.2x new csr=%#2.2x.", dev->name,
 412                    csr0, board->Lance.RDP);
 413             printk("[");
 414             if (csr0 & INTR)
 415                 printk(" INTR");
 416             if (csr0 & INEA)
 417                 printk(" INEA");
 418             if (csr0 & RXON)
 419                 printk(" RXON");
 420             if (csr0 & TXON)
 421                 printk(" TXON");
 422             if (csr0 & TDMD)
 423                 printk(" TDMD");
 424             if (csr0 & STOP)
 425                 printk(" STOP");
 426             if (csr0 & STRT)
 427                 printk(" STRT");
 428             if (csr0 & INIT)
 429                 printk(" INIT");
 430             if (csr0 & ERR)
 431                 printk(" ERR");
 432             if (csr0 & BABL)
 433                 printk(" BABL");
 434             if (csr0 & CERR)
 435                 printk(" CERR");
 436             if (csr0 & MISS)
 437                 printk(" MISS");
 438             if (csr0 & MERR)
 439                 printk(" MERR");
 440             if (csr0 & RINT)
 441                 printk(" RINT");
 442             if (csr0 & TINT)
 443                 printk(" TINT");
 444             if (csr0 & IDON)
 445                 printk(" IDON");
 446             printk(" ]\n");
 447         }
 448 #endif
 449 
 450         if (csr0 & RINT)        /* Rx interrupt */
 451             ariadne_rx(dev);
 452 
 453         if (csr0 & TINT) {      /* Tx-done interrupt */
 454             int dirty_tx = priv->dirty_tx;
 455 
 456             while (dirty_tx < priv->cur_tx) {
 457                 int entry = dirty_tx % TX_RING_SIZE;
 458                 int status = lowb(priv->tx_ring[entry]->TMD1);
 459 
 460                 if (status & TF_OWN)
 461                     break;      /* It still hasn't been Txed */
 462 
 463                 priv->tx_ring[entry]->TMD1 &= 0xff00;
 464 
 465                 if (status & TF_ERR) {
 466                     /* There was an major error, log it. */
 467                     int err_status = priv->tx_ring[entry]->TMD3;
 468                     priv->stats.tx_errors++;
 469                     if (err_status & EF_RTRY)
 470                         priv->stats.tx_aborted_errors++;
 471                     if (err_status & EF_LCAR)
 472                         priv->stats.tx_carrier_errors++;
 473                     if (err_status & EF_LCOL)
 474                         priv->stats.tx_window_errors++;
 475                     if (err_status & EF_UFLO) {
 476                         /* Ackk!  On FIFO errors the Tx unit is turned off! */
 477                         priv->stats.tx_fifo_errors++;
 478                         /* Remove this verbosity later! */
 479                         printk("%s: Tx FIFO error! Status %4.4x.\n", dev->name,
 480                                csr0);
 481                         /* Restart the chip. */
 482                         board->Lance.RDP = STRT;
 483                     }
 484                 } else {
 485                     if (status & (TF_MORE|TF_ONE))
 486                         priv->stats.collisions++;
 487                     priv->stats.tx_packets++;
 488                 }
 489                 dirty_tx++;
 490             }
 491 
 492 #ifndef final_version
 493             if (priv->cur_tx - dirty_tx >= TX_RING_SIZE) {
 494                 printk("out-of-sync dirty pointer, %d vs. %d, full=%d.\n",
 495                        dirty_tx, priv->cur_tx, priv->tx_full);
 496                 dirty_tx += TX_RING_SIZE;
 497             }
 498 #endif
 499 
 500             if (priv->tx_full && dev->tbusy &&
 501                 dirty_tx > priv->cur_tx - TX_RING_SIZE + 2) {
 502                 /* The ring is no longer full, clear tbusy. */
 503                 priv->tx_full = 0;
 504                 dev->tbusy = 0;
 505                 mark_bh(NET_BH);
 506             }
 507 
 508             priv->dirty_tx = dirty_tx;
 509         }
 510 
 511         /* Log misc errors. */
 512         if (csr0 & BABL)
 513             priv->stats.tx_errors++;    /* Tx babble. */
 514         if (csr0 & MISS)
 515             priv->stats.rx_errors++;    /* Missed a Rx frame. */
 516         if (csr0 & MERR) {
 517             printk("%s: Bus master arbitration failure, status %4.4x.\n",
 518                    dev->name, csr0);
 519             /* Restart the chip. */
 520             board->Lance.RDP = STRT;
 521         }
 522     }
 523 
 524     /* Clear any other interrupt, and set interrupt enable. */
 525     board->Lance.RAP = CSR0;    /* PCnet-ISA Controller Status */
 526     board->Lance.RDP = INEA|BABL|CERR|MISS|MERR|IDON;
 527 
 528 #if 0
 529     if (ariadne_debug > 4)
 530         printk("%s: exiting interrupt, csr%d=%#4.4x.\n", dev->name,
 531                board->Lance.RAP, board->Lance.RDP);
 532 #endif
 533 
 534     dev->interrupt = 0;
 535     return;
 536 }
 537 
 538 
 539 static int ariadne_start_xmit(struct sk_buff *skb, struct device *dev)
     /*  */
 540 {
 541     struct ariadne_private *priv = (struct ariadne_private *)dev->priv;
 542     struct AriadneBoard *board = priv->board;
 543     int entry;
 544 
 545     /* Transmitter timeout, serious problems. */
 546     if (dev->tbusy) {
 547         int tickssofar = jiffies - dev->trans_start;
 548         if (tickssofar < 20)
 549             return(1);
 550         board->Lance.RAP = CSR0;        /* PCnet-ISA Controller Status */
 551         printk("%s: transmit timed out, status %4.4x, resetting.\n", dev->name,
 552                board->Lance.RDP);
 553         board->Lance.RDP = STOP;
 554         priv->stats.tx_errors++;
 555 #ifndef final_version
 556         {
 557             int i;
 558             printk(" Ring data dump: dirty_tx %d cur_tx %d%s cur_rx %d.",
 559                    priv->dirty_tx, priv->cur_tx, priv->tx_full ? " (full)" : "",
 560                    priv->cur_rx);
 561             for (i = 0 ; i < RX_RING_SIZE; i++)
 562                 printk("%s %08x %04x %04x", i & 0x3 ? "" : "\n ",
 563                        (swapw((priv->rx_ring[i]->RMD1))<<16)|swapw(priv->rx_ring[i]->RMD0),
 564                        swapw(-priv->rx_ring[i]->RMD2), swapw(priv->rx_ring[i]->RMD3));
 565             for (i = 0 ; i < TX_RING_SIZE; i++)
 566                 printk("%s %08x %04x %04x", i & 0x3 ? "" : "\n ",
 567                        (swapw((priv->tx_ring[i]->TMD1))<<16)|swapw(priv->tx_ring[i]->TMD0),
 568                        swapw(-priv->tx_ring[i]->TMD2), priv->tx_ring[i]->TMD3);
 569             printk("\n");
 570         }
 571 #endif
 572         ariadne_init_ring(dev);
 573         board->Lance.RDP = INEA|STRT;
 574 
 575         dev->tbusy = 0;
 576         dev->trans_start = jiffies;
 577 
 578         return(0);
 579     }
 580 
 581     if (skb == NULL) {
 582         dev_tint(dev);
 583         return(0);
 584     }
 585 
 586     if (skb->len <= 0)
 587         return(0);
 588 
 589 #if 0
 590     if (ariadne_debug > 3) {
 591         board->Lance.RAP = CSR0;        /* PCnet-ISA Controller Status */
 592         printk("%s: ariadne_start_xmit() called, csr0 %4.4x.\n", dev->name,
 593                board->Lance.RDP);
 594         board->Lance.RDP = 0x0000;
 595     }
 596 #endif
 597 
 598     /* Block a timer-based transmit from overlapping.  This could better be
 599         done with atomic_swap(1, dev->tbusy), but set_bit() works as well. */
 600     if (set_bit(0, (void*)&dev->tbusy) != 0) {
 601         printk("%s: Transmitter access conflict.\n", dev->name);
 602         return(1);
 603     }
 604 
 605     if (set_bit(0, (void*)&priv->lock) != 0) {
 606         if (ariadne_debug > 0)
 607             printk("%s: tx queue lock!.\n", dev->name);
 608         /* don't clear dev->tbusy flag. */
 609         return(1);
 610     }
 611 
 612     /* Fill in a Tx ring entry */
 613 
 614 #if 0
 615     printk("TX pkt type 0x%04x from ", ((u_short *)skb->data)[6]);
 616     {
 617         int i;
 618         u_char *ptr = &((u_char *)skb->data)[6];
 619         for (i = 0; i < 6; i++)
 620             printk("%02x", ptr[i]);
 621     }
 622     printk(" to ");
 623     {
 624         int i;
 625         u_char *ptr = (u_char *)skb->data;
 626         for (i = 0; i < 6; i++)
 627             printk("%02x", ptr[i]);
 628     }
 629     printk(" data 0x%08x len %d\n", (int)skb->data, (int)skb->len);
 630 #endif
 631 
 632     entry = priv->cur_tx % TX_RING_SIZE;
 633 
 634     /* Caution: the write order is important here, set the base address with
 635                 the "ownership" bits last. */
 636 
 637     priv->tx_ring[entry]->TMD2 = swapw((u_short)-skb->len);
 638     priv->tx_ring[entry]->TMD3 = 0x0000;
 639     memcpyw(priv->tx_buff[entry], (u_short *)skb->data, skb->len);
 640 
 641 #if 0
 642     {
 643         int i, len;
 644 
 645         len = skb->len > 64 ? 64 : skb->len;
 646         len >>= 1;
 647         for (i = 0; i < len; i += 8) {
 648             int j;
 649             printk("%04x:", i);
 650             for (j = 0; (j < 8) && ((i+j) < len); j++) {
 651                 if (!(j & 1))
 652                     printk(" ");
 653                 printk("%04x", priv->tx_buff[entry][i+j]);
 654             }
 655             printk("\n");
 656         }
 657     }
 658 #endif
 659 
 660     priv->tx_ring[entry]->TMD1 = (priv->tx_ring[entry]->TMD1&0xff00)|TF_OWN|TF_STP|TF_ENP;
 661 
 662     dev_kfree_skb(skb, FREE_WRITE);
 663 
 664     priv->cur_tx++;
 665     if ((priv->cur_tx >= TX_RING_SIZE) && (priv->dirty_tx >= TX_RING_SIZE)) {
 666 
 667 #if 0
 668         printk("*** Subtracting TX_RING_SIZE from cur_tx (%d) and dirty_tx (%d)\n",
 669                priv->cur_tx, priv->dirty_tx);
 670 #endif
 671 
 672         priv->cur_tx -= TX_RING_SIZE;
 673         priv->dirty_tx -= TX_RING_SIZE;
 674     }
 675 
 676     /* Trigger an immediate send poll. */
 677     board->Lance.RAP = CSR0;    /* PCnet-ISA Controller Status */
 678     board->Lance.RDP = INEA|TDMD;
 679 
 680     dev->trans_start = jiffies;
 681 
 682     cli();
 683     priv->lock = 0;
 684     if (lowb(priv->tx_ring[(entry+1) % TX_RING_SIZE]->TMD1) == 0)
 685         dev->tbusy = 0;
 686     else
 687         priv->tx_full = 1;
 688     sti();
 689 
 690     return(0);
 691 }
 692 
 693 
 694 static int ariadne_rx(struct device *dev)
     /*  */
 695 {
 696     struct ariadne_private *priv = (struct ariadne_private *)dev->priv;
 697     int entry = priv->cur_rx % RX_RING_SIZE;
 698     int i;
 699 
 700     /* If we own the next entry, it's a new packet. Send it up. */
 701     while (!(lowb(priv->rx_ring[entry]->RMD1) & RF_OWN)) {
 702         int status = lowb(priv->rx_ring[entry]->RMD1);
 703 
 704         if (status != (RF_STP|RF_ENP)) {        /* There was an error. */
 705             /* There is a tricky error noted by John Murphy,
 706                 <murf@perftech.com> to Russ Nelson: Even with full-sized
 707                 buffers it's possible for a jabber packet to use two
 708                 buffers, with only the last correctly noting the error. */
 709             if (status & RF_ENP)
 710                 /* Only count a general error at the end of a packet.*/
 711                 priv->stats.rx_errors++;
 712             if (status & RF_FRAM)
 713                 priv->stats.rx_frame_errors++;
 714             if (status & RF_OFLO)
 715                 priv->stats.rx_over_errors++;
 716             if (status & RF_CRC)
 717                 priv->stats.rx_crc_errors++;
 718             if (status & RF_BUFF)
 719                 priv->stats.rx_fifo_errors++;
 720             priv->rx_ring[entry]->RMD1 &= 0xff00|RF_STP|RF_ENP;
 721         } else {
 722             /* Malloc up new buffer, compatible with net-3. */
 723             short pkt_len = swapw(priv->rx_ring[entry]->RMD3);
 724             struct sk_buff *skb;
 725 
 726             skb = dev_alloc_skb(pkt_len+2);
 727             if (skb == NULL) {
 728                 printk("%s: Memory squeeze, deferring packet.\n", dev->name);
 729                 for (i = 0; i < RX_RING_SIZE; i++)
 730                     if (lowb(priv->rx_ring[(entry+i) % RX_RING_SIZE]->RMD1) & RF_OWN)
 731                         break;
 732 
 733                 if (i > RX_RING_SIZE-2) {
 734                     priv->stats.rx_dropped++;
 735                     priv->rx_ring[entry]->RMD1 |= RF_OWN;
 736                     priv->cur_rx++;
 737                 }
 738                 break;
 739             }
 740 
 741 
 742             skb->dev = dev;
 743             skb_reserve(skb,2);         /* 16 byte align */
 744             skb_put(skb,pkt_len);       /* Make room */
 745             eth_copy_and_sum(skb, (char *)priv->rx_buff[entry], pkt_len,0);
 746             skb->protocol=eth_type_trans(skb,dev);
 747 #if 0
 748             printk("RX pkt type 0x%04x from ", ((u_short *)skb->data)[6]);
 749             {
 750                 int i;
 751                 u_char *ptr = &((u_char *)skb->data)[6];
 752                 for (i = 0; i < 6; i++)
 753                     printk("%02x", ptr[i]);
 754             }
 755             printk(" to ");
 756             {
 757                 int i;
 758                 u_char *ptr = (u_char *)skb->data;
 759                 for (i = 0; i < 6; i++)
 760                     printk("%02x", ptr[i]);
 761             }
 762             printk(" data 0x%08x len %d\n", (int)skb->data, (int)skb->len);
 763 #endif
 764 
 765             netif_rx(skb);
 766             priv->stats.rx_packets++;
 767         }
 768 
 769         priv->rx_ring[entry]->RMD1 |= RF_OWN;
 770         entry = (++priv->cur_rx) % RX_RING_SIZE;
 771     }
 772 
 773     priv->cur_rx = priv->cur_rx % RX_RING_SIZE;
 774 
 775     /* We should check that at least two ring entries are free.  If not,
 776        we should free one and mark stats->rx_dropped++. */
 777 
 778     return(0);
 779 }
 780 
 781 
 782 static struct enet_statistics *ariadne_get_stats(struct device *dev)
     /*  */
 783 {
 784     struct ariadne_private *priv = (struct ariadne_private *)dev->priv;
 785     struct AriadneBoard *board = priv->board;
 786     short saved_addr;
 787 
 788     cli();
 789     saved_addr = board->Lance.RAP;
 790     board->Lance.RAP = CSR112;  /* Missed Frame Count */
 791     priv->stats.rx_missed_errors = swapw(board->Lance.RDP);
 792     board->Lance.RAP = saved_addr;
 793     sti();
 794 
 795     return(&priv->stats);
 796 }
 797 
 798 
 799 /* Set or clear the multicast filter for this adaptor.
 800     num_addrs == -1     Promiscuous mode, receive all packets
 801     num_addrs == 0      Normal mode, clear multicast list
 802     num_addrs > 0       Multicast mode, receive normal and MC packets, and do
 803                         best-effort filtering.
 804  */
 805 static void set_multicast_list(struct device *dev)
     /*  */
 806 {
 807     struct ariadne_private *priv = (struct ariadne_private *)dev->priv;
 808     struct AriadneBoard *board = priv->board;
 809 
 810     /* We take the simple way out and always enable promiscuous mode. */
 811     board->Lance.RAP = CSR0;    /* PCnet-ISA Controller Status */
 812     board->Lance.RDP = STOP;    /* Temporarily stop the lance. */
 813 
 814     if (dev->flags & IFF_PROMISC) {
 815         /* Log any net taps. */
 816         printk("%s: Promiscuous mode enabled.\n", dev->name);
 817         board->Lance.RAP = CSR15;       /* Mode Register */
 818         board->Lance.RDP = PROM;        /* Set promiscuous mode */
 819     } else {
 820         short multicast_table[4];
 821         int num_addrs = dev->mc_count;
 822         int i;
 823         /* We don't use the multicast table, but rely on upper-layer filtering. */
 824         memset(multicast_table, (num_addrs == 0) ? 0 : -1,
 825                sizeof(multicast_table));
 826         for (i = 0; i < 4; i++) {
 827             board->Lance.RAP = CSR8+(i<<8);     /* Logical Address Filter */
 828             board->Lance.RDP = swapw(multicast_table[i]);
 829         }
 830         board->Lance.RAP = CSR15;       /* Mode Register */
 831         board->Lance.RDP = 0x0000;      /* Unset promiscuous mode */
 832     }
 833 
 834     board->Lance.RAP = CSR0;            /* PCnet-ISA Controller Status */
 835     board->Lance.RDP = INEA|STRT|IDON;  /* Resume normal operation. */
 836 }
/* */
root/drivers/net/ariadne.c

DEFINITIONS
