drivers/atm/eni.c

   1 /* drivers/atm/eni.c - Efficient Networks ENI155P device driver */
   2
   3 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
   4
   5
   6 #include <linux/module.h>
   7 #include <linux/config.h>
   8 #include <linux/kernel.h>
   9 #include <linux/mm.h>
  10 #include <linux/pci.h>
  11 #include <linux/errno.h>
  12 #include <linux/atm.h>
  13 #include <linux/atmdev.h>
  14 #include <linux/sonet.h>
  15 #include <linux/skbuff.h>
  16 #include <linux/time.h>
  17 #include <linux/delay.h>
  18 #include <linux/uio.h>
  19 #include <linux/init.h>
  20 #include <linux/atm_eni.h>
  21 #include <linux/bitops.h>
  22 #include <asm/system.h>
  23 #include <asm/io.h>
  24 #include <asm/atomic.h>
  25 #include <asm/uaccess.h>
  26 #include <asm/string.h>
  27 #include <asm/byteorder.h>
  28
  29 #include "tonga.h"
  30 #include "midway.h"
  31 #include "suni.h"
  32 #include "eni.h"
  33
  34 #if !defined(__i386__) && !defined(__x86_64__)
  35 #ifndef ioremap_nocache
  36 #define ioremap_nocache(X,Y) ioremap(X,Y)
  37 #endif
  38 #endif
  39
  40 /*
  41  * TODO:
  42  *
  43  * Show stoppers
  44  *  none
  45  *
  46  * Minor
  47  *  - OAM support
  48  *  - fix bugs listed below
  49  */
  50
  51 /*
  52  * KNOWN BUGS:
  53  *
  54  * - may run into JK-JK bug and deadlock
  55  * - should allocate UBR channel first
  56  * - buffer space allocation algorithm is stupid
  57  *   (RX: should be maxSDU+maxdelay*rate
  58  *    TX: should be maxSDU+min(maxSDU,maxdelay*rate) )
  59  * - doesn't support OAM cells
  60  * - eni_put_free may hang if not putting memory fragments that _complete_
  61  *   2^n block (never happens in real life, though)
  62  * - keeps IRQ even if initialization fails
  63  */
  64
  65
  66 #if 0
  67 #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
  68 #else
  69 #define DPRINTK(format,args...)
  70 #endif
  71
  72
  73 #ifndef CONFIG_ATM_ENI_TUNE_BURST
  74 #define CONFIG_ATM_ENI_BURST_TX_8W
  75 #define CONFIG_ATM_ENI_BURST_RX_4W
  76 #endif
  77
  78
  79 #ifndef CONFIG_ATM_ENI_DEBUG
  80
  81
  82 #define NULLCHECK(x)
  83
  84 #define EVENT(s,a,b)
  85
  86
  87 static void event_dump(void)
  88 {
  89 }
  90
  91
  92 #else
  93
  94
  95 /*
  96  * NULL pointer checking
  97  */
  98
  99 #define NULLCHECK(x) \
 100         if ((unsigned long) (x) < 0x30) \
 101                 printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x))
 102
 103 /*
 104  * Very extensive activity logging. Greatly improves bug detection speed but
 105  * costs a few Mbps if enabled.
 106  */
 107
 108 #define EV 64
 109
 110 static const char *ev[EV];
 111 static unsigned long ev_a[EV],ev_b[EV];
 112 static int ec = 0;
 113
 114
 115 static void EVENT(const char *s,unsigned long a,unsigned long b)
 116 {
 117         ev[ec] = s;
 118         ev_a[ec] = a;
 119         ev_b[ec] = b;
 120         ec = (ec+1) % EV;
 121 }
 122
 123
 124 static void event_dump(void)
 125 {
 126         int n,i;
 127
 128         for (n = 0; n < EV; n++) {
 129                 i = (ec+n) % EV;
 130                 printk(KERN_NOTICE);
 131                 printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]);
 132         }
 133 }
 134
 135
 136 #endif /* CONFIG_ATM_ENI_DEBUG */
 137
 138
 139 /*
 140  * NExx   must not be equal at end
 141  * EExx   may be equal at end
 142  * xxPJOK verify validity of pointer jumps
 143  * xxPMOK operating on a circular buffer of "c" words
 144  */
 145
 146 #define NEPJOK(a0,a1,b) \
 147     ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1))
 148 #define EEPJOK(a0,a1,b) \
 149     ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1))
 150 #define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b)
 151 #define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b)
 152
 153
 154 static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0,
 155   backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0,
 156   putting = 0;
 157
 158 static struct atm_dev *eni_boards = NULL;
 159
 160 static u32 *cpu_zeroes = NULL; /* aligned "magic" zeroes */
 161 static dma_addr_t zeroes;
 162
 163 /* Read/write registers on card */
 164 #define eni_in(r)       readl(eni_dev->reg+(r)*4)
 165 #define eni_out(v,r)    writel((v),eni_dev->reg+(r)*4)
 166
 167
 168 /*-------------------------------- utilities --------------------------------*/
 169
 170
 171 static void dump_mem(struct eni_dev *eni_dev)
 172 {
 173         int i;
 174
 175         for (i = 0; i < eni_dev->free_len; i++)
 176                 printk(KERN_DEBUG "  %d: %p %d\n",i,
 177                     eni_dev->free_list[i].start,
 178                     1 << eni_dev->free_list[i].order);
 179 }
 180
 181
 182 static void dump(struct atm_dev *dev)
 183 {
 184         struct eni_dev *eni_dev;
 185
 186         int i;
 187
 188         eni_dev = ENI_DEV(dev);
 189         printk(KERN_NOTICE "Free memory\n");
 190         dump_mem(eni_dev);
 191         printk(KERN_NOTICE "TX buffers\n");
 192         for (i = 0; i < NR_CHAN; i++)
 193                 if (eni_dev->tx[i].send)
 194                         printk(KERN_NOTICE "  TX %d @ %p: %ld\n",i,
 195                             eni_dev->tx[i].send,eni_dev->tx[i].words*4);
 196         printk(KERN_NOTICE "RX buffers\n");
 197         for (i = 0; i < 1024; i++)
 198                 if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx)
 199                         printk(KERN_NOTICE "  RX %d @ %p: %ld\n",i,
 200                             ENI_VCC(eni_dev->rx_map[i])->recv,
 201                             ENI_VCC(eni_dev->rx_map[i])->words*4);
 202         printk(KERN_NOTICE "----\n");
 203 }
 204
 205
 206 static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start,
 207     unsigned long size)
 208 {
 209         struct eni_free *list;
 210         int len,order;
 211
 212         DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size);
 213         start += eni_dev->base_diff;
 214         list = eni_dev->free_list;
 215         len = eni_dev->free_len;
 216         while (size) {
 217                 if (len >= eni_dev->free_list_size) {
 218                         printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n",
 219                             start,size);
 220                         break;
 221                 }
 222                 for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++);
 223                 if (MID_MIN_BUF_SIZE > (1 << order)) {
 224                         printk(KERN_CRIT "eni_put_free: order %d too small\n",
 225                             order);
 226                         break;
 227                 }
 228                 list[len].start = (void __iomem *) start;
 229                 list[len].order = order;
 230                 len++;
 231                 start += 1 << order;
 232                 size -= 1 << order;
 233         }
 234         eni_dev->free_len = len;
 235         /*dump_mem(eni_dev);*/
 236 }
 237
 238
 239 static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size)
 240 {
 241         struct eni_free *list;
 242         void __iomem *start;
 243         int len,i,order,best_order,index;
 244
 245         list = eni_dev->free_list;
 246         len = eni_dev->free_len;
 247         if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE;
 248         if (*size > MID_MAX_BUF_SIZE) return NULL;
 249         for (order = 0; (1 << order) < *size; order++);
 250         DPRINTK("trying: %ld->%d\n",*size,order);
 251         best_order = 65; /* we don't have more than 2^64 of anything ... */
 252         index = 0; /* silence GCC */
 253         for (i = 0; i < len; i++)
 254                 if (list[i].order == order) {
 255                         best_order = order;
 256                         index = i;
 257                         break;
 258                 }
 259                 else if (best_order > list[i].order && list[i].order > order) {
 260                                 best_order = list[i].order;
 261                                 index = i;
 262                         }
 263         if (best_order == 65) return NULL;
 264         start = list[index].start-eni_dev->base_diff;
 265         list[index] = list[--len];
 266         eni_dev->free_len = len;
 267         *size = 1 << order;
 268         eni_put_free(eni_dev,start+*size,(1 << best_order)-*size);
 269         DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start);
 270         memset_io(start,0,*size);       /* never leak data */
 271         /*dump_mem(eni_dev);*/
 272         return start;
 273 }
 274
 275
 276 static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start,
 277     unsigned long size)
 278 {
 279         struct eni_free *list;
 280         int len,i,order;
 281
 282         start += eni_dev->base_diff;
 283         list = eni_dev->free_list;
 284         len = eni_dev->free_len;
 285         for (order = -1; size; order++) size >>= 1;
 286         DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order);
 287         for (i = 0; i < len; i++)
 288                 if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) &&
 289                     list[i].order == order) {
 290                         DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i,
 291                             list[i].start,start,1 << order,list[i].order,order);
 292                         list[i] = list[--len];
 293                         start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order));
 294                         order++;
 295                         i = -1;
 296                         continue;
 297                 }
 298         if (len >= eni_dev->free_list_size) {
 299                 printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start,
 300                     order);
 301                 return;
 302         }
 303         list[len].start = start;
 304         list[len].order = order;
 305         eni_dev->free_len = len+1;
 306         /*dump_mem(eni_dev);*/
 307 }
 308
 309
 310 /*----------------------------------- RX ------------------------------------*/
 311
 312
 313 #define ENI_VCC_NOS ((struct atm_vcc *) 1)
 314
 315
 316 static void rx_ident_err(struct atm_vcc *vcc)
 317 {
 318         struct atm_dev *dev;
 319         struct eni_dev *eni_dev;
 320         struct eni_vcc *eni_vcc;
 321
 322         dev = vcc->dev;
 323         eni_dev = ENI_DEV(dev);
 324         /* immediately halt adapter */
 325         eni_out(eni_in(MID_MC_S) &
 326             ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S);
 327         /* dump useful information */
 328         eni_vcc = ENI_VCC(vcc);
 329         printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident "
 330             "mismatch\n",dev->number);
 331         printk(KERN_ALERT "  VCI %d, rxing %d, words %ld\n",vcc->vci,
 332             eni_vcc->rxing,eni_vcc->words);
 333         printk(KERN_ALERT "  host descr 0x%lx, rx pos 0x%lx, descr value "
 334             "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos,
 335             (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4));
 336         printk(KERN_ALERT "  last %p, servicing %d\n",eni_vcc->last,
 337             eni_vcc->servicing);
 338         EVENT("---dump ends here---\n",0,0);
 339         printk(KERN_NOTICE "---recent events---\n");
 340         event_dump();
 341         ENI_DEV(dev)->fast = NULL; /* really stop it */
 342         ENI_DEV(dev)->slow = NULL;
 343         skb_queue_head_init(&ENI_DEV(dev)->rx_queue);
 344 }
 345
 346
 347 static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb,
 348     unsigned long skip,unsigned long size,unsigned long eff)
 349 {
 350         struct eni_dev *eni_dev;
 351         struct eni_vcc *eni_vcc;
 352         u32 dma_rd,dma_wr;
 353         u32 dma[RX_DMA_BUF*2];
 354         dma_addr_t paddr;
 355         unsigned long here;
 356         int i,j;
 357
 358         eni_dev = ENI_DEV(vcc->dev);
 359         eni_vcc = ENI_VCC(vcc);
 360         paddr = 0; /* GCC, shut up */
 361         if (skb) {
 362                 paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len,
 363                     PCI_DMA_FROMDEVICE);
 364                 ENI_PRV_PADDR(skb) = paddr;
 365                 if (paddr & 3)
 366                         printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has "
 367                             "mis-aligned RX data (0x%lx)\n",vcc->dev->number,
 368                             vcc->vci,(unsigned long) paddr);
 369                 ENI_PRV_SIZE(skb) = size+skip;
 370                     /* PDU plus descriptor */
 371                 ATM_SKB(skb)->vcc = vcc;
 372         }
 373         j = 0;
 374         if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */
 375                 here = (eni_vcc->descr+skip) & (eni_vcc->words-1);
 376                 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci
 377                     << MID_DMA_VCI_SHIFT) | MID_DT_JK;
 378                 j++;
 379         }
 380         here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1);
 381         if (!eff) size += skip;
 382         else {
 383                 unsigned long words;
 384
 385                 if (!size) {
 386                         DPRINTK("strange things happen ...\n");
 387                         EVENT("strange things happen ... (skip=%ld,eff=%ld)\n",
 388                             size,eff);
 389                 }
 390                 words = eff;
 391                 if (paddr & 15) {
 392                         unsigned long init;
 393
 394                         init = 4-((paddr & 15) >> 2);
 395                         if (init > words) init = words;
 396                         dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
 397                             (vcc->vci << MID_DMA_VCI_SHIFT);
 398                         dma[j++] = paddr;
 399                         paddr += init << 2;
 400                         words -= init;
 401                 }
 402 #ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */
 403                 if (words & ~15) {
 404                         dma[j++] = MID_DT_16W | ((words >> 4) <<
 405                             MID_DMA_COUNT_SHIFT) | (vcc->vci <<
 406                             MID_DMA_VCI_SHIFT);
 407                         dma[j++] = paddr;
 408                         paddr += (words & ~15) << 2;
 409                         words &= 15;
 410                 }
 411 #endif
 412 #ifdef CONFIG_ATM_ENI_BURST_RX_8W  /* works only with *some* PCI chipsets ... */
 413                 if (words & ~7) {
 414                         dma[j++] = MID_DT_8W | ((words >> 3) <<
 415                             MID_DMA_COUNT_SHIFT) | (vcc->vci <<
 416                             MID_DMA_VCI_SHIFT);
 417                         dma[j++] = paddr;
 418                         paddr += (words & ~7) << 2;
 419                         words &= 7;
 420                 }
 421 #endif
 422 #ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */
 423                 if (words & ~3) {
 424                         dma[j++] = MID_DT_4W | ((words >> 2) <<
 425                             MID_DMA_COUNT_SHIFT) | (vcc->vci <<
 426                             MID_DMA_VCI_SHIFT);
 427                         dma[j++] = paddr;
 428                         paddr += (words & ~3) << 2;
 429                         words &= 3;
 430                 }
 431 #endif
 432 #ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */
 433                 if (words & ~1) {
 434                         dma[j++] = MID_DT_2W | ((words >> 1) <<
 435                             MID_DMA_COUNT_SHIFT) | (vcc->vci <<
 436                             MID_DMA_VCI_SHIFT);
 437                         dma[j++] = paddr;
 438                         paddr += (words & ~1) << 2;
 439                         words &= 1;
 440                 }
 441 #endif
 442                 if (words) {
 443                         dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT)
 444                             | (vcc->vci << MID_DMA_VCI_SHIFT);
 445                         dma[j++] = paddr;
 446                 }
 447         }
 448         if (size != eff) {
 449                 dma[j++] = (here << MID_DMA_COUNT_SHIFT) |
 450                     (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK;
 451                 j++;
 452         }
 453         if (!j || j > 2*RX_DMA_BUF) {
 454                 printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n");
 455                 goto trouble;
 456         }
 457         dma[j-2] |= MID_DMA_END;
 458         j = j >> 1;
 459         dma_wr = eni_in(MID_DMA_WR_RX);
 460         dma_rd = eni_in(MID_DMA_RD_RX);
 461         /*
 462          * Can I move the dma_wr pointer by 2j+1 positions without overwriting
 463          * data that hasn't been read (position of dma_rd) yet ?
 464          */
 465         if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */
 466                 printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n",
 467                     vcc->dev->number);
 468                 goto trouble;
 469         }
 470         for (i = 0; i < j; i++) {
 471                 writel(dma[i*2],eni_dev->rx_dma+dma_wr*8);
 472                 writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4);
 473                 dma_wr = (dma_wr+1) & (NR_DMA_RX-1);
 474         }
 475         if (skb) {
 476                 ENI_PRV_POS(skb) = eni_vcc->descr+size+1;
 477                 skb_queue_tail(&eni_dev->rx_queue,skb);
 478                 eni_vcc->last = skb;
 479 rx_enqueued++;
 480         }
 481         eni_vcc->descr = here;
 482         eni_out(dma_wr,MID_DMA_WR_RX);
 483         return 0;
 484
 485 trouble:
 486         if (paddr)
 487                 pci_unmap_single(eni_dev->pci_dev,paddr,skb->len,
 488                     PCI_DMA_FROMDEVICE);
 489         if (skb) dev_kfree_skb_irq(skb);
 490         return -1;
 491 }
 492
 493
 494 static void discard(struct atm_vcc *vcc,unsigned long size)
 495 {
 496         struct eni_vcc *eni_vcc;
 497
 498         eni_vcc = ENI_VCC(vcc);
 499         EVENT("discard (size=%ld)\n",size,0);
 500         while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0);
 501             /* could do a full fallback, but that might be more expensive */
 502         if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1;
 503         else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1);
 504 }
 505
 506
 507 /*
 508  * TODO: should check whether direct copies (without DMA setup, dequeuing on
 509  * interrupt, etc.) aren't much faster for AAL0
 510  */
 511
 512 static int rx_aal0(struct atm_vcc *vcc)
 513 {
 514         struct eni_vcc *eni_vcc;
 515         unsigned long descr;
 516         unsigned long length;
 517         struct sk_buff *skb;
 518
 519         DPRINTK(">rx_aal0\n");
 520         eni_vcc = ENI_VCC(vcc);
 521         descr = readl(eni_vcc->recv+eni_vcc->descr*4);
 522         if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
 523                 rx_ident_err(vcc);
 524                 return 1;
 525         }
 526         if (descr & MID_RED_T) {
 527                 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
 528                     vcc->dev->number);
 529                 length = 0;
 530                 atomic_inc(&vcc->stats->rx_err);
 531         }
 532         else {
 533                 length = ATM_CELL_SIZE-1; /* no HEC */
 534         }
 535         skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL;
 536         if (!skb) {
 537                 discard(vcc,length >> 2);
 538                 return 0;
 539         }
 540         skb_put(skb,length);
 541         skb->stamp = eni_vcc->timestamp;
 542         DPRINTK("got len %ld\n",length);
 543         if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1;
 544         eni_vcc->rxing++;
 545         return 0;
 546 }
 547
 548
 549 static int rx_aal5(struct atm_vcc *vcc)
 550 {
 551         struct eni_vcc *eni_vcc;
 552         unsigned long descr;
 553         unsigned long size,eff,length;
 554         struct sk_buff *skb;
 555
 556         EVENT("rx_aal5\n",0,0);
 557         DPRINTK(">rx_aal5\n");
 558         eni_vcc = ENI_VCC(vcc);
 559         descr = readl(eni_vcc->recv+eni_vcc->descr*4);
 560         if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
 561                 rx_ident_err(vcc);
 562                 return 1;
 563         }
 564         if (descr & (MID_RED_T | MID_RED_CRC_ERR)) {
 565                 if (descr & MID_RED_T) {
 566                         EVENT("empty cell (descr=0x%lx)\n",descr,0);
 567                         DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
 568                             vcc->dev->number);
 569                         size = 0;
 570                 }
 571                 else {
 572                         static unsigned long silence = 0;
 573
 574                         if (time_after(jiffies, silence) || silence == 0) {
 575                                 printk(KERN_WARNING DEV_LABEL "(itf %d): "
 576                                     "discarding PDU(s) with CRC error\n",
 577                                     vcc->dev->number);
 578                                 silence = (jiffies+2*HZ)|1;
 579                         }
 580                         size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
 581                         EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr,
 582                             size);
 583                 }
 584                 eff = length = 0;
 585                 atomic_inc(&vcc->stats->rx_err);
 586         }
 587         else {
 588                 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
 589                 DPRINTK("size=%ld\n",size);
 590                 length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) &
 591                     (eni_vcc->words-1)))*4) & 0xffff;
 592                                 /* -trailer(2)+header(1) */
 593                 if (length && length <= (size << 2)-8 && length <=
 594                   ATM_MAX_AAL5_PDU) eff = (length+3) >> 2;
 595                 else {                           /* ^ trailer length (8) */
 596                         EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr,
 597                             length);
 598                         printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU "
 599                             "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n",
 600                             vcc->dev->number,vcc->vci,length,size << 2,descr);
 601                         length = eff = 0;
 602                         atomic_inc(&vcc->stats->rx_err);
 603                 }
 604         }
 605         skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL;
 606         if (!skb) {
 607                 discard(vcc,size);
 608                 return 0;
 609         }
 610         skb_put(skb,length);
 611         DPRINTK("got len %ld\n",length);
 612         if (do_rx_dma(vcc,skb,1,size,eff)) return 1;
 613         eni_vcc->rxing++;
 614         return 0;
 615 }
 616
 617
 618 static inline int rx_vcc(struct atm_vcc *vcc)
 619 {
 620         void __iomem *vci_dsc;
 621         unsigned long tmp;
 622         struct eni_vcc *eni_vcc;
 623
 624         eni_vcc = ENI_VCC(vcc);
 625         vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16;
 626         EVENT("rx_vcc(1)\n",0,0);
 627         while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >>
 628             MID_VCI_DESCR_SHIFT)) {
 629                 EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n",
 630                     eni_vcc->descr,tmp);
 631                 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
 632                     (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
 633                     MID_VCI_DESCR_SHIFT));
 634                 if (ENI_VCC(vcc)->rx(vcc)) return 1;
 635         }
 636         /* clear IN_SERVICE flag */
 637         writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc);
 638         /*
 639          * If new data has arrived between evaluating the while condition and
 640          * clearing IN_SERVICE, we wouldn't be notified until additional data
 641          * follows. So we have to loop again to be sure.
 642          */
 643         EVENT("rx_vcc(3)\n",0,0);
 644         while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR)
 645             >> MID_VCI_DESCR_SHIFT)) {
 646                 EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n",
 647                     eni_vcc->descr,tmp);
 648                 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
 649                     (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
 650                     MID_VCI_DESCR_SHIFT));
 651                 if (ENI_VCC(vcc)->rx(vcc)) return 1;
 652         }
 653         return 0;
 654 }
 655
 656
 657 static void poll_rx(struct atm_dev *dev)
 658 {
 659         struct eni_dev *eni_dev;
 660         struct atm_vcc *curr;
 661
 662         eni_dev = ENI_DEV(dev);
 663         while ((curr = eni_dev->fast)) {
 664                 EVENT("poll_rx.fast\n",0,0);
 665                 if (rx_vcc(curr)) return;
 666                 eni_dev->fast = ENI_VCC(curr)->next;
 667                 ENI_VCC(curr)->next = ENI_VCC_NOS;
 668                 barrier();
 669                 ENI_VCC(curr)->servicing--;
 670         }
 671         while ((curr = eni_dev->slow)) {
 672                 EVENT("poll_rx.slow\n",0,0);
 673                 if (rx_vcc(curr)) return;
 674                 eni_dev->slow = ENI_VCC(curr)->next;
 675                 ENI_VCC(curr)->next = ENI_VCC_NOS;
 676                 barrier();
 677                 ENI_VCC(curr)->servicing--;
 678         }
 679 }
 680
 681
 682 static void get_service(struct atm_dev *dev)
 683 {
 684         struct eni_dev *eni_dev;
 685         struct atm_vcc *vcc;
 686         unsigned long vci;
 687
 688         DPRINTK(">get_service\n");
 689         eni_dev = ENI_DEV(dev);
 690         while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) {
 691                 vci = readl(eni_dev->service+eni_dev->serv_read*4);
 692                 eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1);
 693                 vcc = eni_dev->rx_map[vci & 1023];
 694                 if (!vcc) {
 695                         printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not "
 696                             "found\n",dev->number,vci);
 697                         continue; /* nasty but we try to go on anyway */
 698                         /* @@@ nope, doesn't work */
 699                 }
 700                 EVENT("getting from service\n",0,0);
 701                 if (ENI_VCC(vcc)->next != ENI_VCC_NOS) {
 702                         EVENT("double service\n",0,0);
 703                         DPRINTK("Grr, servicing VCC %ld twice\n",vci);
 704                         continue;
 705                 }
 706                 do_gettimeofday(&ENI_VCC(vcc)->timestamp);
 707                 ENI_VCC(vcc)->next = NULL;
 708                 if (vcc->qos.rxtp.traffic_class == ATM_CBR) {
 709                         if (eni_dev->fast)
 710                                 ENI_VCC(eni_dev->last_fast)->next = vcc;
 711                         else eni_dev->fast = vcc;
 712                         eni_dev->last_fast = vcc;
 713                 }
 714                 else {
 715                         if (eni_dev->slow)
 716                                 ENI_VCC(eni_dev->last_slow)->next = vcc;
 717                         else eni_dev->slow = vcc;
 718                         eni_dev->last_slow = vcc;
 719                 }
 720 putting++;
 721                 ENI_VCC(vcc)->servicing++;
 722         }
 723 }
 724
 725
 726 static void dequeue_rx(struct atm_dev *dev)
 727 {
 728         struct eni_dev *eni_dev;
 729         struct eni_vcc *eni_vcc;
 730         struct atm_vcc *vcc;
 731         struct sk_buff *skb;
 732         void __iomem *vci_dsc;
 733         int first;
 734
 735         eni_dev = ENI_DEV(dev);
 736         first = 1;
 737         while (1) {
 738                 skb = skb_dequeue(&eni_dev->rx_queue);
 739                 if (!skb) {
 740                         if (first) {
 741                                 DPRINTK(DEV_LABEL "(itf %d): RX but not "
 742                                     "rxing\n",dev->number);
 743                                 EVENT("nothing to dequeue\n",0,0);
 744                         }
 745                         break;
 746                 }
 747                 EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb),
 748                     ENI_PRV_POS(skb));
 749 rx_dequeued++;
 750                 vcc = ATM_SKB(skb)->vcc;
 751                 eni_vcc = ENI_VCC(vcc);
 752                 first = 0;
 753                 vci_dsc = eni_dev->vci+vcc->vci*16;
 754                 if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb),
 755                     (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT,
 756                     eni_vcc->words)) {
 757                         EVENT("requeuing\n",0,0);
 758                         skb_queue_head(&eni_dev->rx_queue,skb);
 759                         break;
 760                 }
 761                 eni_vcc->rxing--;
 762                 eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1);
 763                 pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len,
 764                     PCI_DMA_TODEVICE);
 765                 if (!skb->len) dev_kfree_skb_irq(skb);
 766                 else {
 767                         EVENT("pushing (len=%ld)\n",skb->len,0);
 768                         if (vcc->qos.aal == ATM_AAL0)
 769                                 *(unsigned long *) skb->data =
 770                                     ntohl(*(unsigned long *) skb->data);
 771                         memset(skb->cb,0,sizeof(struct eni_skb_prv));
 772                         vcc->push(vcc,skb);
 773                         pushed++;
 774                 }
 775                 atomic_inc(&vcc->stats->rx);
 776         }
 777         wake_up(&eni_dev->rx_wait);
 778 }
 779
 780
 781 static int open_rx_first(struct atm_vcc *vcc)
 782 {
 783         struct eni_dev *eni_dev;
 784         struct eni_vcc *eni_vcc;
 785         unsigned long size;
 786
 787         DPRINTK("open_rx_first\n");
 788         eni_dev = ENI_DEV(vcc->dev);
 789         eni_vcc = ENI_VCC(vcc);
 790         eni_vcc->rx = NULL;
 791         if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0;
 792         size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100;
 793         if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <=
 794             MID_MAX_BUF_SIZE)
 795                 size = MID_MAX_BUF_SIZE;
 796         eni_vcc->recv = eni_alloc_mem(eni_dev,&size);
 797         DPRINTK("rx at 0x%lx\n",eni_vcc->recv);
 798         eni_vcc->words = size >> 2;
 799         if (!eni_vcc->recv) return -ENOBUFS;
 800         eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0;
 801         eni_vcc->descr = 0;
 802         eni_vcc->rx_pos = 0;
 803         eni_vcc->rxing = 0;
 804         eni_vcc->servicing = 0;
 805         eni_vcc->next = ENI_VCC_NOS;
 806         return 0;
 807 }
 808
 809
 810 static int open_rx_second(struct atm_vcc *vcc)
 811 {
 812         void __iomem *here;
 813         struct eni_dev *eni_dev;
 814         struct eni_vcc *eni_vcc;
 815         unsigned long size;
 816         int order;
 817
 818         DPRINTK("open_rx_second\n");
 819         eni_dev = ENI_DEV(vcc->dev);
 820         eni_vcc = ENI_VCC(vcc);
 821         if (!eni_vcc->rx) return 0;
 822         /* set up VCI descriptor */
 823         here = eni_dev->vci+vcc->vci*16;
 824         DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4);
 825         size = eni_vcc->words >> 8;
 826         for (order = -1; size; order++) size >>= 1;
 827         writel(0,here+4); /* descr, read = 0 */
 828         writel(0,here+8); /* write, state, count = 0 */
 829         if (eni_dev->rx_map[vcc->vci])
 830                 printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already "
 831                     "in use\n",vcc->dev->number,vcc->vci);
 832         eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */
 833         writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) <<
 834             MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE |
 835             (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) <<
 836             MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here);
 837         return 0;
 838 }
 839
 840
 841 static void close_rx(struct atm_vcc *vcc)
 842 {
 843         DECLARE_WAITQUEUE(wait,current);
 844         void __iomem *here;
 845         struct eni_dev *eni_dev;
 846         struct eni_vcc *eni_vcc;
 847
 848         eni_vcc = ENI_VCC(vcc);
 849         if (!eni_vcc->rx) return;
 850         eni_dev = ENI_DEV(vcc->dev);
 851         if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) {
 852                 here = eni_dev->vci+vcc->vci*16;
 853                 /* block receiver */
 854                 writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH <<
 855                     MID_VCI_MODE_SHIFT),here);
 856                 /* wait for receiver to become idle */
 857                 udelay(27);
 858                 /* discard pending cell */
 859                 writel(readl(here) & ~MID_VCI_IN_SERVICE,here);
 860                 /* don't accept any new ones */
 861                 eni_dev->rx_map[vcc->vci] = NULL;
 862                 /* wait for RX queue to drain */
 863                 DPRINTK("eni_close: waiting for RX ...\n");
 864                 EVENT("RX closing\n",0,0);
 865                 add_wait_queue(&eni_dev->rx_wait,&wait);
 866                 set_current_state(TASK_UNINTERRUPTIBLE);
 867                 barrier();
 868                 for (;;) {
 869                         /* transition service->rx: rxing++, servicing-- */
 870                         if (!eni_vcc->servicing) {
 871                                 barrier();
 872                                 if (!eni_vcc->rxing) break;
 873                         }
 874                         EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing,
 875                             eni_vcc->servicing);
 876                         printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing,
 877                             eni_vcc->rxing);
 878                         schedule();
 879                         set_current_state(TASK_UNINTERRUPTIBLE);
 880                 }
 881                 for (;;) {
 882                         int at_end;
 883                         u32 tmp;
 884
 885                         tasklet_disable(&eni_dev->task);
 886                         tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ;
 887                         at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT;
 888                         tasklet_enable(&eni_dev->task);
 889                         if (at_end) break;
 890                         EVENT("drain discard (host 0x%lx, nic 0x%lx)\n",
 891                             eni_vcc->rx_pos,tmp);
 892                         printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n",
 893                             eni_vcc->rx_pos,tmp);
 894                         schedule();
 895                         set_current_state(TASK_UNINTERRUPTIBLE);
 896                 }
 897                 set_current_state(TASK_RUNNING);
 898                 remove_wait_queue(&eni_dev->rx_wait,&wait);
 899         }
 900         eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2);
 901         eni_vcc->rx = NULL;
 902 }
 903
 904
 905 static int start_rx(struct atm_dev *dev)
 906 {
 907         struct eni_dev *eni_dev;
 908
 909         eni_dev = ENI_DEV(dev);
 910         eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL);
 911         if (!eni_dev->rx_map) {
 912                 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
 913                     dev->number);
 914                 free_page((unsigned long) eni_dev->free_list);
 915                 return -ENOMEM;
 916         }
 917         memset(eni_dev->rx_map,0,PAGE_SIZE);
 918         eni_dev->rx_mult = DEFAULT_RX_MULT;
 919         eni_dev->fast = eni_dev->last_fast = NULL;
 920         eni_dev->slow = eni_dev->last_slow = NULL;
 921         init_waitqueue_head(&eni_dev->rx_wait);
 922         skb_queue_head_init(&eni_dev->rx_queue);
 923         eni_dev->serv_read = eni_in(MID_SERV_WRITE);
 924         eni_out(0,MID_DMA_WR_RX);
 925         return 0;
 926 }
 927
 928
 929 /*----------------------------------- TX ------------------------------------*/
 930
 931
 932 enum enq_res { enq_ok,enq_next,enq_jam };
 933
 934
 935 static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr,
 936     u32 size)
 937 {
 938         u32 init,words;
 939
 940         DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size);
 941         EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size);
 942 #if 0 /* don't complain anymore */
 943         if (paddr & 3)
 944                 printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr);
 945         if (size & 3)
 946                 printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size);
 947 #endif
 948         if (paddr & 3) {
 949                 init = 4-(paddr & 3);
 950                 if (init > size || size < 7) init = size;
 951                 DPRINTK("put_dma: %lx DMA: %d/%d bytes\n",
 952                     (unsigned long) paddr,init,size);
 953                 dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) |
 954                     (chan << MID_DMA_CHAN_SHIFT);
 955                 dma[(*j)++] = paddr;
 956                 paddr += init;
 957                 size -= init;
 958         }
 959         words = size >> 2;
 960         size &= 3;
 961         if (words && (paddr & 31)) {
 962                 init = 8-((paddr & 31) >> 2);
 963                 if (init > words) init = words;
 964                 DPRINTK("put_dma: %lx DMA: %d/%d words\n",
 965                     (unsigned long) paddr,init,words);
 966                 dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
 967                     (chan << MID_DMA_CHAN_SHIFT);
 968                 dma[(*j)++] = paddr;
 969                 paddr += init << 2;
 970                 words -= init;
 971         }
 972 #ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */
 973         if (words & ~15) {
 974                 DPRINTK("put_dma: %lx DMA: %d*16/%d words\n",
 975                     (unsigned long) paddr,words >> 4,words);
 976                 dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT)
 977                     | (chan << MID_DMA_CHAN_SHIFT);
 978                 dma[(*j)++] = paddr;
 979                 paddr += (words & ~15) << 2;
 980                 words &= 15;
 981         }
 982 #endif
 983 #ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */
 984         if (words & ~7) {
 985                 DPRINTK("put_dma: %lx DMA: %d*8/%d words\n",
 986                     (unsigned long) paddr,words >> 3,words);
 987                 dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT)
 988                     | (chan << MID_DMA_CHAN_SHIFT);
 989                 dma[(*j)++] = paddr;
 990                 paddr += (words & ~7) << 2;
 991                 words &= 7;
 992         }
 993 #endif
 994 #ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */
 995         if (words & ~3) {
 996                 DPRINTK("put_dma: %lx DMA: %d*4/%d words\n",
 997                     (unsigned long) paddr,words >> 2,words);
 998                 dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT)
 999                     | (chan << MID_DMA_CHAN_SHIFT);
1000                 dma[(*j)++] = paddr;
1001                 paddr += (words & ~3) << 2;
1002                 words &= 3;
1003         }
1004 #endif
1005 #ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */
1006         if (words & ~1) {
1007                 DPRINTK("put_dma: %lx DMA: %d*2/%d words\n",
1008                     (unsigned long) paddr,words >> 1,words);
1009                 dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT)
1010                     | (chan << MID_DMA_CHAN_SHIFT);
1011                 dma[(*j)++] = paddr;
1012                 paddr += (words & ~1) << 2;
1013                 words &= 1;
1014         }
1015 #endif
1016         if (words) {
1017                 DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr,
1018                     words);
1019                 dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) |
1020                     (chan << MID_DMA_CHAN_SHIFT);
1021                 dma[(*j)++] = paddr;
1022                 paddr += words << 2;
1023         }
1024         if (size) {
1025                 DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr,
1026                     size);
1027                 dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) |
1028                     (chan << MID_DMA_CHAN_SHIFT);
1029                 dma[(*j)++] = paddr;
1030         }
1031 }
1032
1033
1034 static enum enq_res do_tx(struct sk_buff *skb)
1035 {
1036         struct atm_vcc *vcc;
1037         struct eni_dev *eni_dev;
1038         struct eni_vcc *eni_vcc;
1039         struct eni_tx *tx;
1040         dma_addr_t paddr;
1041         u32 dma_rd,dma_wr;
1042         u32 size; /* in words */
1043         int aal5,dma_size,i,j;
1044
1045         DPRINTK(">do_tx\n");
1046         NULLCHECK(skb);
1047         EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len);
1048         vcc = ATM_SKB(skb)->vcc;
1049         NULLCHECK(vcc);
1050         eni_dev = ENI_DEV(vcc->dev);
1051         NULLCHECK(eni_dev);
1052         eni_vcc = ENI_VCC(vcc);
1053         tx = eni_vcc->tx;
1054         NULLCHECK(tx);
1055 #if 0 /* Enable this for testing with the "align" program */
1056         {
1057                 unsigned int hack = *((char *) skb->data)-'0';
1058
1059                 if (hack < 8) {
1060                         skb->data += hack;
1061                         skb->len -= hack;
1062                 }
1063         }
1064 #endif
1065 #if 0 /* should work now */
1066         if ((unsigned long) skb->data & 3)
1067                 printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned "
1068                     "TX data\n",vcc->dev->number,vcc->vci);
1069 #endif
1070         /*
1071          * Potential future IP speedup: make hard_header big enough to put
1072          * segmentation descriptor directly into PDU. Saves: 4 slave writes,
1073          * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-)
1074          */
1075
1076         aal5 = vcc->qos.aal == ATM_AAL5;
1077         /* check space in buffer */
1078         if (!aal5)
1079                 size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE;
1080                         /* cell without HEC plus segmentation header (includes
1081                            four-byte cell header) */
1082         else {
1083                 size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1;
1084                         /* add AAL5 trailer */
1085                 size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE;
1086                                                 /* add segmentation header */
1087         }
1088         /*
1089          * Can I move tx_pos by size bytes without getting closer than TX_GAP
1090          * to the read pointer ? TX_GAP means to leave some space for what
1091          * the manual calls "too close".
1092          */
1093         if (!NEPMOK(tx->tx_pos,size+TX_GAP,
1094             eni_in(MID_TX_RDPTR(tx->index)),tx->words)) {
1095                 DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n",
1096                     vcc->dev->number,size);
1097                 return enq_next;
1098         }
1099         /* check DMA */
1100         dma_wr = eni_in(MID_DMA_WR_TX);
1101         dma_rd = eni_in(MID_DMA_RD_TX);
1102         dma_size = 3; /* JK for descriptor and final fill, plus final size
1103                          mis-alignment fix */
1104 DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags);
1105         if (!skb_shinfo(skb)->nr_frags) dma_size += 5;
1106         else dma_size += 5*(skb_shinfo(skb)->nr_frags+1);
1107         if (dma_size > TX_DMA_BUF) {
1108                 printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries "
1109                     "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF);
1110         }
1111         DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos);
1112         if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) <
1113              dma_size) {
1114                 printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n",
1115                     vcc->dev->number);
1116                 return enq_jam;
1117         }
1118         paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len,
1119             PCI_DMA_TODEVICE);
1120         ENI_PRV_PADDR(skb) = paddr;
1121         /* prepare DMA queue entries */
1122         j = 0;
1123         eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) <<
1124              MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1125              MID_DT_JK;
1126         j++;
1127         if (!skb_shinfo(skb)->nr_frags)
1128                 if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len);
1129                 else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4);
1130         else {
1131 DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */
1132                 for (i = -1; i < skb_shinfo(skb)->nr_frags; i++)
1133                         if (i == -1)
1134                                 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1135                                     skb->data,
1136                                     skb->len - skb->data_len);
1137                         else
1138                                 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1139                                     skb_shinfo(skb)->frags[i].page + skb_shinfo(skb)->frags[i].page_offset,
1140                                     skb_shinfo(skb)->frags[i].size);
1141         }
1142         if (skb->len & 3)
1143                 put_dma(tx->index,eni_dev->dma,&j,zeroes,4-(skb->len & 3));
1144         /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */
1145         eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) <<
1146              MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1147              MID_DMA_END | MID_DT_JK;
1148         j++;
1149         DPRINTK("DMA at end: %d\n",j);
1150         /* store frame */
1151         writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) |
1152             (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) |
1153             (tx->resolution << MID_SEG_RATE_SHIFT) |
1154             (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4);
1155 /*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/
1156         writel((vcc->vci << MID_SEG_VCI_SHIFT) |
1157             (aal5 ? 0 : (skb->data[3] & 0xf)) |
1158             (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0),
1159             tx->send+((tx->tx_pos+1) & (tx->words-1))*4);
1160         DPRINTK("size: %d, len:%d\n",size,skb->len);
1161         if (aal5)
1162                 writel(skb->len,tx->send+
1163                     ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4);
1164         j = j >> 1;
1165         for (i = 0; i < j; i++) {
1166                 writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8);
1167                 writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4);
1168                 dma_wr = (dma_wr+1) & (NR_DMA_TX-1);
1169         }
1170         ENI_PRV_POS(skb) = tx->tx_pos;
1171         ENI_PRV_SIZE(skb) = size;
1172         ENI_VCC(vcc)->txing += size;
1173         tx->tx_pos = (tx->tx_pos+size) & (tx->words-1);
1174         DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos);
1175         eni_out(dma_wr,MID_DMA_WR_TX);
1176         skb_queue_tail(&eni_dev->tx_queue,skb);
1177 queued++;
1178         return enq_ok;
1179 }
1180
1181
1182 static void poll_tx(struct atm_dev *dev)
1183 {
1184         struct eni_tx *tx;
1185         struct sk_buff *skb;
1186         enum enq_res res;
1187         int i;
1188
1189         DPRINTK(">poll_tx\n");
1190         for (i = NR_CHAN-1; i >= 0; i--) {
1191                 tx = &ENI_DEV(dev)->tx[i];
1192                 if (tx->send)
1193                         while ((skb = skb_dequeue(&tx->backlog))) {
1194                                 res = do_tx(skb);
1195                                 if (res == enq_ok) continue;
1196                                 DPRINTK("re-queuing TX PDU\n");
1197                                 skb_queue_head(&tx->backlog,skb);
1198 requeued++;
1199                                 if (res == enq_jam) return;
1200                                 break;
1201                         }
1202         }
1203 }
1204
1205
1206 static void dequeue_tx(struct atm_dev *dev)
1207 {
1208         struct eni_dev *eni_dev;
1209         struct atm_vcc *vcc;
1210         struct sk_buff *skb;
1211         struct eni_tx *tx;
1212
1213         NULLCHECK(dev);
1214         eni_dev = ENI_DEV(dev);
1215         NULLCHECK(eni_dev);
1216         while ((skb = skb_dequeue(&eni_dev->tx_queue))) {
1217                 vcc = ATM_SKB(skb)->vcc;
1218                 NULLCHECK(vcc);
1219                 tx = ENI_VCC(vcc)->tx;
1220                 NULLCHECK(ENI_VCC(vcc)->tx);
1221                 DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb),
1222                     (unsigned) eni_in(MID_TX_DESCRSTART(tx->index)));
1223                 if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) ==
1224                     eni_in(MID_TX_DESCRSTART(tx->index))) {
1225                         skb_queue_head(&eni_dev->tx_queue,skb);
1226                         break;
1227                 }
1228                 ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb);
1229                 pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len,
1230                     PCI_DMA_TODEVICE);
1231                 if (vcc->pop) vcc->pop(vcc,skb);
1232                 else dev_kfree_skb_irq(skb);
1233                 atomic_inc(&vcc->stats->tx);
1234                 wake_up(&eni_dev->tx_wait);
1235 dma_complete++;
1236         }
1237 }
1238
1239
1240 static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr)
1241 {
1242         int i;
1243
1244         for (i = !ubr; i < NR_CHAN; i++)
1245                 if (!eni_dev->tx[i].send) return eni_dev->tx+i;
1246         return NULL;
1247 }
1248
1249
1250 static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre,
1251     int *res,int unlimited)
1252 {
1253         static const int pre_div[] = { 4,16,128,2048 };
1254             /* 2^(((x+2)^2-(x+2))/2+1) */
1255
1256         if (unlimited) *pre = *res = 0;
1257         else {
1258                 if (*pcr > 0) {
1259                         int div;
1260
1261                         for (*pre = 0; *pre < 3; (*pre)++)
1262                                 if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break;
1263                         div = pre_div[*pre]**pcr;
1264                         DPRINTK("min div %d\n",div);
1265                         *res = TS_CLOCK/div-1;
1266                 }
1267                 else {
1268                         int div;
1269
1270                         if (!*pcr) *pcr = eni_dev->tx_bw+reserved;
1271                         for (*pre = 3; *pre >= 0; (*pre)--)
1272                                 if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break;
1273                         if (*pre < 3) (*pre)++; /* else fail later */
1274                         div = pre_div[*pre]*-*pcr;
1275                         DPRINTK("max div %d\n",div);
1276                         *res = (TS_CLOCK+div-1)/div-1;
1277                 }
1278                 if (*res < 0) *res = 0;
1279                 if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE;
1280         }
1281         *pcr = TS_CLOCK/pre_div[*pre]/(*res+1);
1282         DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res);
1283         return 0;
1284 }
1285
1286
1287 static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp,
1288     int set_rsv,int set_shp)
1289 {
1290         struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1291         struct eni_vcc *eni_vcc = ENI_VCC(vcc);
1292         struct eni_tx *tx;
1293         unsigned long size;
1294         void __iomem *mem;
1295         int rate,ubr,unlimited,new_tx;
1296         int pre,res,order;
1297         int error;
1298
1299         rate = atm_pcr_goal(txtp);
1300         ubr = txtp->traffic_class == ATM_UBR;
1301         unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR ||
1302             rate >= ATM_OC3_PCR);
1303         if (!unlimited) {
1304                 size = txtp->max_sdu*eni_dev->tx_mult/100;
1305                 if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <=
1306                     MID_MAX_BUF_SIZE)
1307                         size = MID_MAX_BUF_SIZE;
1308         }
1309         else {
1310                 if (eni_dev->ubr) {
1311                         eni_vcc->tx = eni_dev->ubr;
1312                         txtp->pcr = ATM_OC3_PCR;
1313                         return 0;
1314                 }
1315                 size = UBR_BUFFER;
1316         }
1317         new_tx = !eni_vcc->tx;
1318         mem = NULL; /* for gcc */
1319         if (!new_tx) tx = eni_vcc->tx;
1320         else {
1321                 mem = eni_alloc_mem(eni_dev,&size);
1322                 if (!mem) return -ENOBUFS;
1323                 tx = alloc_tx(eni_dev,unlimited);
1324                 if (!tx) {
1325                         eni_free_mem(eni_dev,mem,size);
1326                         return -EBUSY;
1327                 }
1328                 DPRINTK("got chan %d\n",tx->index);
1329                 tx->reserved = tx->shaping = 0;
1330                 tx->send = mem;
1331                 tx->words = size >> 2;
1332                 skb_queue_head_init(&tx->backlog);
1333                 for (order = 0; size > (1 << (order+10)); order++);
1334                 eni_out((order << MID_SIZE_SHIFT) |
1335                     ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)),
1336                     MID_TX_PLACE(tx->index));
1337                 tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) &
1338                     MID_DESCR_START;
1339         }
1340         error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited);
1341         if (!error  && txtp->min_pcr > rate) error = -EINVAL;
1342         if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR &&
1343             txtp->max_pcr < rate) error = -EINVAL;
1344         if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved)
1345                 error = -EINVAL;
1346         if (!error && set_rsv && !set_shp && rate < tx->shaping)
1347                 error = -EINVAL;
1348         if (!error && !set_rsv && rate > tx->reserved && !ubr)
1349                 error = -EINVAL;
1350         if (error) {
1351                 if (new_tx) {
1352                         tx->send = NULL;
1353                         eni_free_mem(eni_dev,mem,size);
1354                 }
1355                 return error;
1356         }
1357         txtp->pcr = rate;
1358         if (set_rsv && !ubr) {
1359                 eni_dev->tx_bw += tx->reserved;
1360                 tx->reserved = rate;
1361                 eni_dev->tx_bw -= rate;
1362         }
1363         if (set_shp || (unlimited && new_tx)) {
1364                 if (unlimited && new_tx) eni_dev->ubr = tx;
1365                 tx->prescaler = pre;
1366                 tx->resolution = res;
1367                 tx->shaping = rate;
1368         }
1369         if (set_shp) eni_vcc->tx = tx;
1370         DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping);
1371         return 0;
1372 }
1373
1374
1375 static int open_tx_first(struct atm_vcc *vcc)
1376 {
1377         ENI_VCC(vcc)->tx = NULL;
1378         if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0;
1379         ENI_VCC(vcc)->txing = 0;
1380         return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1);
1381 }
1382
1383
1384 static int open_tx_second(struct atm_vcc *vcc)
1385 {
1386         return 0; /* nothing to do */
1387 }
1388
1389
1390 static void close_tx(struct atm_vcc *vcc)
1391 {
1392         DECLARE_WAITQUEUE(wait,current);
1393         struct eni_dev *eni_dev;
1394         struct eni_vcc *eni_vcc;
1395
1396         eni_vcc = ENI_VCC(vcc);
1397         if (!eni_vcc->tx) return;
1398         eni_dev = ENI_DEV(vcc->dev);
1399         /* wait for TX queue to drain */
1400         DPRINTK("eni_close: waiting for TX ...\n");
1401         add_wait_queue(&eni_dev->tx_wait,&wait);
1402         set_current_state(TASK_UNINTERRUPTIBLE);
1403         for (;;) {
1404                 int txing;
1405
1406                 tasklet_disable(&eni_dev->task);
1407                 txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing;
1408                 tasklet_enable(&eni_dev->task);
1409                 if (!txing) break;
1410                 DPRINTK("%d TX left\n",eni_vcc->txing);
1411                 schedule();
1412                 set_current_state(TASK_UNINTERRUPTIBLE);
1413         }
1414         set_current_state(TASK_RUNNING);
1415         remove_wait_queue(&eni_dev->tx_wait,&wait);
1416         if (eni_vcc->tx != eni_dev->ubr) {
1417                 /*
1418                  * Looping a few times in here is probably far cheaper than
1419                  * keeping track of TX completions all the time, so let's poll
1420                  * a bit ...
1421                  */
1422                 while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) !=
1423                     eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index)))
1424                         schedule();
1425                 eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2);
1426                 eni_vcc->tx->send = NULL;
1427                 eni_dev->tx_bw += eni_vcc->tx->reserved;
1428         }
1429         eni_vcc->tx = NULL;
1430 }
1431
1432
1433 static int start_tx(struct atm_dev *dev)
1434 {
1435         struct eni_dev *eni_dev;
1436         int i;
1437
1438         eni_dev = ENI_DEV(dev);
1439         eni_dev->lost = 0;
1440         eni_dev->tx_bw = ATM_OC3_PCR;
1441         eni_dev->tx_mult = DEFAULT_TX_MULT;
1442         init_waitqueue_head(&eni_dev->tx_wait);
1443         eni_dev->ubr = NULL;
1444         skb_queue_head_init(&eni_dev->tx_queue);
1445         eni_out(0,MID_DMA_WR_TX);
1446         for (i = 0; i < NR_CHAN; i++) {
1447                 eni_dev->tx[i].send = NULL;
1448                 eni_dev->tx[i].index = i;
1449         }
1450         return 0;
1451 }
1452
1453
1454 /*--------------------------------- common ----------------------------------*/
1455
1456
1457 #if 0 /* may become useful again when tuning things */
1458
1459 static void foo(void)
1460 {
1461 printk(KERN_INFO
1462   "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n"
1463   "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n",
1464   tx_complete,dma_complete,queued,requeued,submitted,backlogged,
1465   rx_enqueued,rx_dequeued,putting,pushed);
1466 if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost);
1467 }
1468
1469 #endif
1470
1471
1472 static void bug_int(struct atm_dev *dev,unsigned long reason)
1473 {
1474         struct eni_dev *eni_dev;
1475
1476         DPRINTK(">bug_int\n");
1477         eni_dev = ENI_DEV(dev);
1478         if (reason & MID_DMA_ERR_ACK)
1479                 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1480                     "error\n",dev->number);
1481         if (reason & MID_TX_IDENT_MISM)
1482                 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident "
1483                     "mismatch\n",dev->number);
1484         if (reason & MID_TX_DMA_OVFL)
1485                 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1486                     "overflow\n",dev->number);
1487         EVENT("---dump ends here---\n",0,0);
1488         printk(KERN_NOTICE "---recent events---\n");
1489         event_dump();
1490 }
1491
1492
1493 static irqreturn_t eni_int(int irq,void *dev_id,struct pt_regs *regs)
1494 {
1495         struct atm_dev *dev;
1496         struct eni_dev *eni_dev;
1497         u32 reason;
1498
1499         DPRINTK(">eni_int\n");
1500         dev = dev_id;
1501         eni_dev = ENI_DEV(dev);
1502         reason = eni_in(MID_ISA);
1503         DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason);
1504         /*
1505          * Must handle these two right now, because reading ISA doesn't clear
1506          * them, so they re-occur and we never make it to the tasklet. Since
1507          * they're rare, we don't mind the occasional invocation of eni_tasklet
1508          * with eni_dev->events == 0.
1509          */
1510         if (reason & MID_STAT_OVFL) {
1511                 EVENT("stat overflow\n",0,0);
1512                 eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH;
1513         }
1514         if (reason & MID_SUNI_INT) {
1515                 EVENT("SUNI int\n",0,0);
1516                 dev->phy->interrupt(dev);
1517 #if 0
1518                 foo();
1519 #endif
1520         }
1521         spin_lock(&eni_dev->lock);
1522         eni_dev->events |= reason;
1523         spin_unlock(&eni_dev->lock);
1524         tasklet_schedule(&eni_dev->task);
1525         return IRQ_HANDLED;
1526 }
1527
1528
1529 static void eni_tasklet(unsigned long data)
1530 {
1531         struct atm_dev *dev = (struct atm_dev *) data;
1532         struct eni_dev *eni_dev = ENI_DEV(dev);
1533         unsigned long flags;
1534         u32 events;
1535
1536         DPRINTK("eni_tasklet (dev %p)\n",dev);
1537         spin_lock_irqsave(&eni_dev->lock,flags);
1538         events = xchg(&eni_dev->events,0);
1539         spin_unlock_irqrestore(&eni_dev->lock,flags);
1540         if (events & MID_RX_DMA_COMPLETE) {
1541                 EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0);
1542                 dequeue_rx(dev);
1543                 EVENT("dequeue_rx done, starting poll_rx\n",0,0);
1544                 poll_rx(dev);
1545                 EVENT("poll_rx done\n",0,0);
1546                 /* poll_tx ? */
1547         }
1548         if (events & MID_SERVICE) {
1549                 EVENT("INT: service, starting get_service\n",0,0);
1550                 get_service(dev);
1551                 EVENT("get_service done, starting poll_rx\n",0,0);
1552                 poll_rx(dev);
1553                 EVENT("poll_rx done\n",0,0);
1554         }
1555         if (events & MID_TX_DMA_COMPLETE) {
1556                 EVENT("INT: TX DMA COMPLETE\n",0,0);
1557                 dequeue_tx(dev);
1558         }
1559         if (events & MID_TX_COMPLETE) {
1560                 EVENT("INT: TX COMPLETE\n",0,0);
1561 tx_complete++;
1562                 wake_up(&eni_dev->tx_wait);
1563                 /* poll_rx ? */
1564         }
1565         if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) {
1566                 EVENT("bug interrupt\n",0,0);
1567                 bug_int(dev,events);
1568         }
1569         poll_tx(dev);
1570 }
1571
1572
1573 /*--------------------------------- entries ---------------------------------*/
1574
1575
1576 static const char *media_name[] __devinitdata = {
1577     "MMF", "SMF", "MMF", "03?", /*  0- 3 */
1578     "UTP", "05?", "06?", "07?", /*  4- 7 */
1579     "TAXI","09?", "10?", "11?", /*  8-11 */
1580     "12?", "13?", "14?", "15?", /* 12-15 */
1581     "MMF", "SMF", "18?", "19?", /* 16-19 */
1582     "UTP", "21?", "22?", "23?", /* 20-23 */
1583     "24?", "25?", "26?", "27?", /* 24-27 */
1584     "28?", "29?", "30?", "31?"  /* 28-31 */
1585 };
1586
1587
1588 #define SET_SEPROM \
1589   ({ if (!error && !pci_error) { \
1590     pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \
1591     udelay(10); /* 10 usecs */ \
1592   } })
1593 #define GET_SEPROM \
1594   ({ if (!error && !pci_error) { \
1595     pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \
1596     udelay(10); /* 10 usecs */ \
1597   } })
1598
1599
1600 static int __devinit get_esi_asic(struct atm_dev *dev)
1601 {
1602         struct eni_dev *eni_dev;
1603         unsigned char tonga;
1604         int error,failed,pci_error;
1605         int address,i,j;
1606
1607         eni_dev = ENI_DEV(dev);
1608         error = pci_error = 0;
1609         tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK;
1610         SET_SEPROM;
1611         for (i = 0; i < ESI_LEN && !error && !pci_error; i++) {
1612                 /* start operation */
1613                 tonga |= SEPROM_DATA;
1614                 SET_SEPROM;
1615                 tonga |= SEPROM_CLK;
1616                 SET_SEPROM;
1617                 tonga &= ~SEPROM_DATA;
1618                 SET_SEPROM;
1619                 tonga &= ~SEPROM_CLK;
1620                 SET_SEPROM;
1621                 /* send address */
1622                 address = ((i+SEPROM_ESI_BASE) << 1)+1;
1623                 for (j = 7; j >= 0; j--) {
1624                         tonga = (address >> j) & 1 ? tonga | SEPROM_DATA :
1625                             tonga & ~SEPROM_DATA;
1626                         SET_SEPROM;
1627                         tonga |= SEPROM_CLK;
1628                         SET_SEPROM;
1629                         tonga &= ~SEPROM_CLK;
1630                         SET_SEPROM;
1631                 }
1632                 /* get ack */
1633                 tonga |= SEPROM_DATA;
1634                 SET_SEPROM;
1635                 tonga |= SEPROM_CLK;
1636                 SET_SEPROM;
1637                 GET_SEPROM;
1638                 failed = tonga & SEPROM_DATA;
1639                 tonga &= ~SEPROM_CLK;
1640                 SET_SEPROM;
1641                 tonga |= SEPROM_DATA;
1642                 SET_SEPROM;
1643                 if (failed) error = -EIO;
1644                 else {
1645                         dev->esi[i] = 0;
1646                         for (j = 7; j >= 0; j--) {
1647                                 dev->esi[i] <<= 1;
1648                                 tonga |= SEPROM_DATA;
1649                                 SET_SEPROM;
1650                                 tonga |= SEPROM_CLK;
1651                                 SET_SEPROM;
1652                                 GET_SEPROM;
1653                                 if (tonga & SEPROM_DATA) dev->esi[i] |= 1;
1654                                 tonga &= ~SEPROM_CLK;
1655                                 SET_SEPROM;
1656                                 tonga |= SEPROM_DATA;
1657                                 SET_SEPROM;
1658                         }
1659                         /* get ack */
1660                         tonga |= SEPROM_DATA;
1661                         SET_SEPROM;
1662                         tonga |= SEPROM_CLK;
1663                         SET_SEPROM;
1664                         GET_SEPROM;
1665                         if (!(tonga & SEPROM_DATA)) error = -EIO;
1666                         tonga &= ~SEPROM_CLK;
1667                         SET_SEPROM;
1668                         tonga |= SEPROM_DATA;
1669                         SET_SEPROM;
1670                 }
1671                 /* stop operation */
1672                 tonga &= ~SEPROM_DATA;
1673                 SET_SEPROM;
1674                 tonga |= SEPROM_CLK;
1675                 SET_SEPROM;
1676                 tonga |= SEPROM_DATA;
1677                 SET_SEPROM;
1678         }
1679         if (pci_error) {
1680                 printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI "
1681                     "(0x%02x)\n",dev->number,pci_error);
1682                 error = -EIO;
1683         }
1684         return error;
1685 }
1686
1687
1688 #undef SET_SEPROM
1689 #undef GET_SEPROM
1690
1691
1692 static int __devinit get_esi_fpga(struct atm_dev *dev, void __iomem *base)
1693 {
1694         void __iomem *mac_base;
1695         int i;
1696
1697         mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom);
1698         for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3));
1699         return 0;
1700 }
1701
1702
1703 static int __devinit eni_do_init(struct atm_dev *dev)
1704 {
1705         struct midway_eprom __iomem *eprom;
1706         struct eni_dev *eni_dev;
1707         struct pci_dev *pci_dev;
1708         unsigned long real_base;
1709         void __iomem *base;
1710         unsigned char revision;
1711         int error,i,last;
1712
1713         DPRINTK(">eni_init\n");
1714         dev->ci_range.vpi_bits = 0;
1715         dev->ci_range.vci_bits = NR_VCI_LD;
1716         dev->link_rate = ATM_OC3_PCR;
1717         eni_dev = ENI_DEV(dev);
1718         pci_dev = eni_dev->pci_dev;
1719         real_base = pci_resource_start(pci_dev, 0);
1720         eni_dev->irq = pci_dev->irq;
1721         error = pci_read_config_byte(pci_dev,PCI_REVISION_ID,&revision);
1722         if (error) {
1723                 printk(KERN_ERR DEV_LABEL "(itf %d): init error 0x%02x\n",
1724                     dev->number,error);
1725                 return -EINVAL;
1726         }
1727         if ((error = pci_write_config_word(pci_dev,PCI_COMMAND,
1728             PCI_COMMAND_MEMORY |
1729             (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1730                 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory "
1731                     "(0x%02x)\n",dev->number,error);
1732                 return -EIO;
1733         }
1734         printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,",
1735             dev->number,revision,real_base,eni_dev->irq);
1736         if (!(base = ioremap_nocache(real_base,MAP_MAX_SIZE))) {
1737                 printk("\n");
1738                 printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page "
1739                     "mapping\n",dev->number);
1740                 return error;
1741         }
1742         eni_dev->base_diff = real_base - (unsigned long) base;
1743         /* id may not be present in ASIC Tonga boards - check this @@@ */
1744         if (!eni_dev->asic) {
1745                 eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom));
1746                 if (readl(&eprom->magic) != ENI155_MAGIC) {
1747                         printk("\n");
1748                         printk(KERN_ERR KERN_ERR DEV_LABEL "(itf %d): bad "
1749                             "magic - expected 0x%x, got 0x%x\n",dev->number,
1750                             ENI155_MAGIC,(unsigned) readl(&eprom->magic));
1751                         return -EINVAL;
1752                 }
1753         }
1754         eni_dev->phy = base+PHY_BASE;
1755         eni_dev->reg = base+REG_BASE;
1756         eni_dev->ram = base+RAM_BASE;
1757         last = MAP_MAX_SIZE-RAM_BASE;
1758         for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) {
1759                 writel(0x55555555,eni_dev->ram+i);
1760                 if (readl(eni_dev->ram+i) != 0x55555555) last = i;
1761                 else {
1762                         writel(0xAAAAAAAA,eni_dev->ram+i);
1763                         if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i;
1764                         else writel(i,eni_dev->ram+i);
1765                 }
1766         }
1767         for (i = 0; i < last; i += RAM_INCREMENT)
1768                 if (readl(eni_dev->ram+i) != i) break;
1769         eni_dev->mem = i;
1770         memset_io(eni_dev->ram,0,eni_dev->mem);
1771         /* TODO: should shrink allocation now */
1772         printk("mem=%dkB (",eni_dev->mem >> 10);
1773         /* TODO: check for non-SUNI, check for TAXI ? */
1774         if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) {
1775                 printk(")\n");
1776                 printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n",
1777                     dev->number,(unsigned) eni_in(MID_RES_ID_MCON));
1778                 return -EINVAL;
1779         }
1780         error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base);
1781         if (error) return error;
1782         for (i = 0; i < ESI_LEN; i++)
1783                 printk("%s%02X",i ? "-" : "",dev->esi[i]);
1784         printk(")\n");
1785         printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number,
1786             eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA",
1787             media_name[eni_in(MID_RES_ID_MCON) & DAUGTHER_ID]);
1788         return suni_init(dev);
1789 }
1790
1791
1792 static int __devinit eni_start(struct atm_dev *dev)
1793 {
1794         struct eni_dev *eni_dev;
1795
1796         void __iomem *buf;
1797         unsigned long buffer_mem;
1798         int error;
1799
1800         DPRINTK(">eni_start\n");
1801         eni_dev = ENI_DEV(dev);
1802         if (request_irq(eni_dev->irq,&eni_int,SA_SHIRQ,DEV_LABEL,dev)) {
1803                 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
1804                     dev->number,eni_dev->irq);
1805                 return -EAGAIN;
1806         }
1807         /* @@@ should release IRQ on error */
1808         pci_set_master(eni_dev->pci_dev);
1809         if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND,
1810             PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
1811             (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1812                 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+"
1813                     "master (0x%02x)\n",dev->number,error);
1814                 return error;
1815         }
1816         if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,
1817             END_SWAP_DMA))) {
1818                 printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap "
1819                     "(0x%02x)\n",dev->number,error);
1820                 return error;
1821         }
1822         /* determine addresses of internal tables */
1823         eni_dev->vci = eni_dev->ram;
1824         eni_dev->rx_dma = eni_dev->ram+NR_VCI*16;
1825         eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8;
1826         eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8;
1827         buf = eni_dev->service+NR_SERVICE*4;
1828         DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n",
1829              eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma,
1830              eni_dev->service,buf);
1831         spin_lock_init(&eni_dev->lock);
1832         tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev);
1833         eni_dev->events = 0;
1834         /* initialize memory management */
1835         buffer_mem = eni_dev->mem - (buf - eni_dev->ram);
1836         eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2;
1837         eni_dev->free_list = (struct eni_free *) kmalloc(
1838             sizeof(struct eni_free)*(eni_dev->free_list_size+1),GFP_KERNEL);
1839         if (!eni_dev->free_list) {
1840                 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
1841                     dev->number);
1842                 return -ENOMEM;
1843         }
1844         eni_dev->free_len = 0;
1845         eni_put_free(eni_dev,buf,buffer_mem);
1846         memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */
1847         /*
1848          * byte_addr  free (k)
1849          * 0x00000000     512  VCI table
1850          * 0x00004000     496  RX DMA
1851          * 0x00005000     492  TX DMA
1852          * 0x00006000     488  service list
1853          * 0x00007000     484  buffers
1854          * 0x00080000       0  end (512kB)
1855          */
1856         eni_out(0xffffffff,MID_IE);
1857         error = start_tx(dev);
1858         if (error) return error;
1859         error = start_rx(dev);
1860         if (error) return error;
1861         error = dev->phy->start(dev);
1862         if (error) return error;
1863         eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) |
1864             MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE,
1865             MID_MC_S);
1866             /* Tonga uses SBus INTReq1 */
1867         (void) eni_in(MID_ISA); /* clear Midway interrupts */
1868         return 0;
1869 }
1870
1871
1872 static void eni_close(struct atm_vcc *vcc)
1873 {
1874         DPRINTK(">eni_close\n");
1875         if (!ENI_VCC(vcc)) return;
1876         clear_bit(ATM_VF_READY,&vcc->flags);
1877         close_rx(vcc);
1878         close_tx(vcc);
1879         DPRINTK("eni_close: done waiting\n");
1880         /* deallocate memory */
1881         kfree(ENI_VCC(vcc));
1882         vcc->dev_data = NULL;
1883         clear_bit(ATM_VF_ADDR,&vcc->flags);
1884         /*foo();*/
1885 }
1886
1887
1888 static int eni_open(struct atm_vcc *vcc)
1889 {
1890         struct eni_dev *eni_dev;
1891         struct eni_vcc *eni_vcc;
1892         int error;
1893         short vpi = vcc->vpi;
1894         int vci = vcc->vci;
1895
1896         DPRINTK(">eni_open\n");
1897         EVENT("eni_open\n",0,0);
1898         if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1899                 vcc->dev_data = NULL;
1900         eni_dev = ENI_DEV(vcc->dev);
1901         if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
1902                 set_bit(ATM_VF_ADDR,&vcc->flags);
1903         if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5)
1904                 return -EINVAL;
1905         DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi,
1906             vcc->vci);
1907         if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
1908                 eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL);
1909                 if (!eni_vcc) return -ENOMEM;
1910                 vcc->dev_data = eni_vcc;
1911                 eni_vcc->tx = NULL; /* for eni_close after open_rx */
1912                 if ((error = open_rx_first(vcc))) {
1913                         eni_close(vcc);
1914                         return error;
1915                 }
1916                 if ((error = open_tx_first(vcc))) {
1917                         eni_close(vcc);
1918                         return error;
1919                 }
1920         }
1921         if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0;
1922         if ((error = open_rx_second(vcc))) {
1923                 eni_close(vcc);
1924                 return error;
1925         }
1926         if ((error = open_tx_second(vcc))) {
1927                 eni_close(vcc);
1928                 return error;
1929         }
1930         set_bit(ATM_VF_READY,&vcc->flags);
1931         /* should power down SUNI while !ref_count @@@ */
1932         return 0;
1933 }
1934
1935
1936 static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs)
1937 {
1938         struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1939         struct eni_tx *tx = ENI_VCC(vcc)->tx;
1940         struct sk_buff *skb;
1941         int error,rate,rsv,shp;
1942
1943         if (qos->txtp.traffic_class == ATM_NONE) return 0;
1944         if (tx == eni_dev->ubr) return -EBADFD;
1945         rate = atm_pcr_goal(&qos->txtp);
1946         if (rate < 0) rate = -rate;
1947         rsv = shp = 0;
1948         if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1;
1949         if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1;
1950         if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1;
1951         if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1;
1952         if (!rsv && !shp) return 0;
1953         error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp);
1954         if (error) return error;
1955         if (shp && !(flgs & ATM_MF_IMMED)) return 0;
1956         /*
1957          * Walk through the send buffer and patch the rate information in all
1958          * segmentation buffer descriptors of this VCC.
1959          */
1960         tasklet_disable(&eni_dev->task);
1961         skb_queue_walk(&eni_dev->tx_queue, skb) {
1962                 void __iomem *dsc;
1963
1964                 if (ATM_SKB(skb)->vcc != vcc) continue;
1965                 dsc = tx->send+ENI_PRV_POS(skb)*4;
1966                 writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) |
1967                     (tx->prescaler << MID_SEG_PR_SHIFT) |
1968                     (tx->resolution << MID_SEG_RATE_SHIFT), dsc);
1969         }
1970         tasklet_enable(&eni_dev->task);
1971         return 0;
1972 }
1973
1974
1975 static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
1976 {
1977         struct eni_dev *eni_dev = ENI_DEV(dev);
1978
1979         if (cmd == ENI_MEMDUMP) {
1980                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1981                 printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d "
1982                     "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number);
1983                 dump(dev);
1984                 return 0;
1985         }
1986         if (cmd == ENI_SETMULT) {
1987                 struct eni_multipliers mult;
1988
1989                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1990                 if (copy_from_user(&mult, arg,
1991                     sizeof(struct eni_multipliers)))
1992                         return -EFAULT;
1993                 if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) ||
1994                     mult.tx > 65536 || mult.rx > 65536)
1995                         return -EINVAL;
1996                 if (mult.tx) eni_dev->tx_mult = mult.tx;
1997                 if (mult.rx) eni_dev->rx_mult = mult.rx;
1998                 return 0;
1999         }
2000         if (cmd == ATM_SETCIRANGE) {
2001                 struct atm_cirange ci;
2002
2003                 if (copy_from_user(&ci, arg,sizeof(struct atm_cirange)))
2004                         return -EFAULT;
2005                 if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) &&
2006                     (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX))
2007                     return 0;
2008                 return -EINVAL;
2009         }
2010         if (!dev->phy->ioctl) return -ENOIOCTLCMD;
2011         return dev->phy->ioctl(dev,cmd,arg);
2012 }
2013
2014
2015 static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname,
2016     void __user *optval,int optlen)
2017 {
2018         return -EINVAL;
2019 }
2020
2021
2022 static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname,
2023     void __user *optval,int optlen)
2024 {
2025         return -EINVAL;
2026 }
2027
2028
2029 static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb)
2030 {
2031         enum enq_res res;
2032
2033         DPRINTK(">eni_send\n");
2034         if (!ENI_VCC(vcc)->tx) {
2035                 if (vcc->pop) vcc->pop(vcc,skb);
2036                 else dev_kfree_skb(skb);
2037                 return -EINVAL;
2038         }
2039         if (!skb) {
2040                 printk(KERN_CRIT "!skb in eni_send ?\n");
2041                 if (vcc->pop) vcc->pop(vcc,skb);
2042                 return -EINVAL;
2043         }
2044         if (vcc->qos.aal == ATM_AAL0) {
2045                 if (skb->len != ATM_CELL_SIZE-1) {
2046                         if (vcc->pop) vcc->pop(vcc,skb);
2047                         else dev_kfree_skb(skb);
2048                         return -EINVAL;
2049                 }
2050                 *(u32 *) skb->data = htonl(*(u32 *) skb->data);
2051         }
2052 submitted++;
2053         ATM_SKB(skb)->vcc = vcc;
2054         tasklet_disable(&ENI_DEV(vcc->dev)->task);
2055         res = do_tx(skb);
2056         tasklet_enable(&ENI_DEV(vcc->dev)->task);
2057         if (res == enq_ok) return 0;
2058         skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb);
2059 backlogged++;
2060         tasklet_schedule(&ENI_DEV(vcc->dev)->task);
2061         return 0;
2062 }
2063
2064 static void eni_phy_put(struct atm_dev *dev,unsigned char value,
2065     unsigned long addr)
2066 {
2067         writel(value,ENI_DEV(dev)->phy+addr*4);
2068 }
2069
2070
2071
2072 static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr)
2073 {
2074         return readl(ENI_DEV(dev)->phy+addr*4);
2075 }
2076
2077
2078 static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page)
2079 {
2080         struct hlist_node *node;
2081         struct sock *s;
2082         static const char *signal[] = { "LOST","unknown","okay" };
2083         struct eni_dev *eni_dev = ENI_DEV(dev);
2084         struct atm_vcc *vcc;
2085         int left,i;
2086
2087         left = *pos;
2088         if (!left)
2089                 return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, "
2090                     "%d cps remaining\n",dev->number,signal[(int) dev->signal],
2091                     eni_dev->mem >> 10,eni_dev->tx_bw);
2092         if (!--left)
2093                 return sprintf(page,"%4sBursts: TX"
2094 #if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \
2095     !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \
2096     !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \
2097     !defined(CONFIG_ATM_ENI_BURST_TX_2W)
2098                     " none"
2099 #endif
2100 #ifdef CONFIG_ATM_ENI_BURST_TX_16W
2101                     " 16W"
2102 #endif
2103 #ifdef CONFIG_ATM_ENI_BURST_TX_8W
2104                     " 8W"
2105 #endif
2106 #ifdef CONFIG_ATM_ENI_BURST_TX_4W
2107                     " 4W"
2108 #endif
2109 #ifdef CONFIG_ATM_ENI_BURST_TX_2W
2110                     " 2W"
2111 #endif
2112                     ", RX"
2113 #if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \
2114     !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \
2115     !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \
2116     !defined(CONFIG_ATM_ENI_BURST_RX_2W)
2117                     " none"
2118 #endif
2119 #ifdef CONFIG_ATM_ENI_BURST_RX_16W
2120                     " 16W"
2121 #endif
2122 #ifdef CONFIG_ATM_ENI_BURST_RX_8W
2123                     " 8W"
2124 #endif
2125 #ifdef CONFIG_ATM_ENI_BURST_RX_4W
2126                     " 4W"
2127 #endif
2128 #ifdef CONFIG_ATM_ENI_BURST_RX_2W
2129                     " 2W"
2130 #endif
2131 #ifndef CONFIG_ATM_ENI_TUNE_BURST
2132                     " (default)"
2133 #endif
2134                     "\n","");
2135         if (!--left)
2136                 return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n",
2137                     "",eni_dev->tx_mult,eni_dev->rx_mult);
2138         for (i = 0; i < NR_CHAN; i++) {
2139                 struct eni_tx *tx = eni_dev->tx+i;
2140
2141                 if (!tx->send) continue;
2142                 if (!--left) {
2143                         return sprintf(page,"tx[%d]:    0x%ld-0x%ld "
2144                             "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i,
2145                             (unsigned long) (tx->send - eni_dev->ram),
2146                             tx->send-eni_dev->ram+tx->words*4-1,tx->words*4,
2147                             tx->reserved,tx->shaping,
2148                             tx == eni_dev->ubr ? " (UBR)" : "");
2149                 }
2150                 if (--left) continue;
2151                 return sprintf(page,"%10sbacklog %u packets\n","",
2152                     skb_queue_len(&tx->backlog));
2153         }
2154         read_lock(&vcc_sklist_lock);
2155         for(i = 0; i < VCC_HTABLE_SIZE; ++i) {
2156                 struct hlist_head *head = &vcc_hash[i];
2157
2158                 sk_for_each(s, node, head) {
2159                         struct eni_vcc *eni_vcc;
2160                         int length;
2161
2162                         vcc = atm_sk(s);
2163                         if (vcc->dev != dev)
2164                                 continue;
2165                         eni_vcc = ENI_VCC(vcc);
2166                         if (--left) continue;
2167                         length = sprintf(page,"vcc %4d: ",vcc->vci);
2168                         if (eni_vcc->rx) {
2169                                 length += sprintf(page+length,"0x%ld-0x%ld "
2170                                     "(%6ld bytes)",
2171                                     (unsigned long) (eni_vcc->recv - eni_dev->ram),
2172                                     eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1,
2173                                     eni_vcc->words*4);
2174                                 if (eni_vcc->tx) length += sprintf(page+length,", ");
2175                         }
2176                         if (eni_vcc->tx)
2177                                 length += sprintf(page+length,"tx[%d], txing %d bytes",
2178                                     eni_vcc->tx->index,eni_vcc->txing);
2179                         page[length] = '\n';
2180                         read_unlock(&vcc_sklist_lock);
2181                         return length+1;
2182                 }
2183         }
2184         read_unlock(&vcc_sklist_lock);
2185         for (i = 0; i < eni_dev->free_len; i++) {
2186                 struct eni_free *fe = eni_dev->free_list+i;
2187                 unsigned long offset;
2188
2189                 if (--left) continue;
2190                 offset = (unsigned long) eni_dev->ram+eni_dev->base_diff;
2191                 return sprintf(page,"free      %p-%p (%6d bytes)\n",
2192                     fe->start-offset,fe->start-offset+(1 << fe->order)-1,
2193                     1 << fe->order);
2194         }
2195         return 0;
2196 }
2197
2198
2199 static const struct atmdev_ops ops = {
2200         .open           = eni_open,
2201         .close          = eni_close,
2202         .ioctl          = eni_ioctl,
2203         .getsockopt     = eni_getsockopt,
2204         .setsockopt     = eni_setsockopt,
2205         .send           = eni_send,
2206         .phy_put        = eni_phy_put,
2207         .phy_get        = eni_phy_get,
2208         .change_qos     = eni_change_qos,
2209         .proc_read      = eni_proc_read
2210 };
2211
2212
2213 static int __devinit eni_init_one(struct pci_dev *pci_dev,
2214     const struct pci_device_id *ent)
2215 {
2216         struct atm_dev *dev;
2217         struct eni_dev *eni_dev;
2218         int error = -ENOMEM;
2219
2220         DPRINTK("eni_init_one\n");
2221
2222         if (pci_enable_device(pci_dev)) {
2223                 error = -EIO;
2224                 goto out0;
2225         }
2226
2227         eni_dev = (struct eni_dev *) kmalloc(sizeof(struct eni_dev),GFP_KERNEL);
2228         if (!eni_dev) goto out0;
2229         if (!cpu_zeroes) {
2230                 cpu_zeroes = pci_alloc_consistent(pci_dev,ENI_ZEROES_SIZE,
2231                     &zeroes);
2232                 if (!cpu_zeroes) goto out1;
2233         }
2234         dev = atm_dev_register(DEV_LABEL,&ops,-1,NULL);
2235         if (!dev) goto out2;
2236         pci_set_drvdata(pci_dev, dev);
2237         eni_dev->pci_dev = pci_dev;
2238         dev->dev_data = eni_dev;
2239         eni_dev->asic = ent->driver_data;
2240         error = eni_do_init(dev);
2241         if (error) goto out3;
2242         error = eni_start(dev);
2243         if (error) goto out3;
2244         eni_dev->more = eni_boards;
2245         eni_boards = dev;
2246         return 0;
2247 out3:
2248         atm_dev_deregister(dev);
2249 out2:
2250         pci_free_consistent(eni_dev->pci_dev,ENI_ZEROES_SIZE,cpu_zeroes,zeroes);
2251         cpu_zeroes = NULL;
2252 out1:
2253         kfree(eni_dev);
2254 out0:
2255         return error;
2256 }
2257
2258
2259 static struct pci_device_id eni_pci_tbl[] = {
2260         { PCI_VENDOR_ID_EF, PCI_DEVICE_ID_EF_ATM_FPGA, PCI_ANY_ID, PCI_ANY_ID,
2261           0, 0, 0 /* FPGA */ },
2262         { PCI_VENDOR_ID_EF, PCI_DEVICE_ID_EF_ATM_ASIC, PCI_ANY_ID, PCI_ANY_ID,
2263           0, 0, 1 /* ASIC */ },
2264         { 0, }
2265 };
2266 MODULE_DEVICE_TABLE(pci,eni_pci_tbl);
2267
2268
2269 static void __devexit eni_remove_one(struct pci_dev *pci_dev)
2270 {
2271         /* grrr */
2272 }
2273
2274
2275 static struct pci_driver eni_driver = {
2276         .name           = DEV_LABEL,
2277         .id_table       = eni_pci_tbl,
2278         .probe          = eni_init_one,
2279         .remove         = __devexit_p(eni_remove_one),
2280 };
2281
2282
2283 static int __init eni_init(void)
2284 {
2285         struct sk_buff *skb; /* dummy for sizeof */
2286
2287         if (sizeof(skb->cb) < sizeof(struct eni_skb_prv)) {
2288                 printk(KERN_ERR "eni_detect: skb->cb is too small (%Zd < %Zd)\n",
2289                     sizeof(skb->cb),sizeof(struct eni_skb_prv));
2290                 return -EIO;
2291         }
2292         return pci_register_driver(&eni_driver);
2293 }
2294
2295
2296 module_init(eni_init);
2297 /* @@@ since exit routine not defined, this module can not be unloaded */
2298
2299 MODULE_LICENSE("GPL");