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   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/kernel.h>
   8 #include <linux/mm.h>
   9 #include <linux/pci.h>
  10 #include <linux/errno.h>
  11 #include <linux/atm.h>
  12 #include <linux/atmdev.h>
  13 #include <linux/sonet.h>
  14 #include <linux/skbuff.h>
  15 #include <linux/time.h>
  16 #include <linux/delay.h>
  17 #include <linux/uio.h>
  18 #include <linux/init.h>
  19 #include <linux/atm_eni.h>
  20 #include <linux/bitops.h>
  21 #include <asm/system.h>
  22 #include <asm/io.h>
  23 #include <asm/atomic.h>
  24 #include <asm/uaccess.h>
  25 #include <asm/string.h>
  26 #include <asm/byteorder.h>
  27
  28 #include "tonga.h"
  29 #include "midway.h"
  30 #include "suni.h"
  31 #include "eni.h"
  32
  33 #if !defined(__i386__) && !defined(__x86_64__)
  34 #ifndef ioremap_nocache
  35 #define ioremap_nocache(X,Y) ioremap(X,Y)
  36 #endif
  37 #endif
  38
  39 /*
  40  * TODO:
  41  *
  42  * Show stoppers
  43  *  none
  44  *
  45  * Minor
  46  *  - OAM support
  47  *  - fix bugs listed below
  48  */
  49
  50 /*
  51  * KNOWN BUGS:
  52  *
  53  * - may run into JK-JK bug and deadlock
  54  * - should allocate UBR channel first
  55  * - buffer space allocation algorithm is stupid
  56  *   (RX: should be maxSDU+maxdelay*rate
  57  *    TX: should be maxSDU+min(maxSDU,maxdelay*rate) )
  58  * - doesn't support OAM cells
  59  * - eni_put_free may hang if not putting memory fragments that _complete_
  60  *   2^n block (never happens in real life, though)
  61  */
  62
  63
  64 #if 0
  65 #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
  66 #else
  67 #define DPRINTK(format,args...)
  68 #endif
  69
  70
  71 #ifndef CONFIG_ATM_ENI_TUNE_BURST
  72 #define CONFIG_ATM_ENI_BURST_TX_8W
  73 #define CONFIG_ATM_ENI_BURST_RX_4W
  74 #endif
  75
  76
  77 #ifndef CONFIG_ATM_ENI_DEBUG
  78
  79
  80 #define NULLCHECK(x)
  81
  82 #define EVENT(s,a,b)
  83
  84
  85 static void event_dump(void)
  86 {
  87 }
  88
  89
  90 #else
  91
  92
  93 /*
  94  * NULL pointer checking
  95  */
  96
  97 #define NULLCHECK(x) \
  98         if ((unsigned long) (x) < 0x30) \
  99                 printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x))
 100
 101 /*
 102  * Very extensive activity logging. Greatly improves bug detection speed but
 103  * costs a few Mbps if enabled.
 104  */
 105
 106 #define EV 64
 107
 108 static const char *ev[EV];
 109 static unsigned long ev_a[EV],ev_b[EV];
 110 static int ec = 0;
 111
 112
 113 static void EVENT(const char *s,unsigned long a,unsigned long b)
 114 {
 115         ev[ec] = s;
 116         ev_a[ec] = a;
 117         ev_b[ec] = b;
 118         ec = (ec+1) % EV;
 119 }
 120
 121
 122 static void event_dump(void)
 123 {
 124         int n,i;
 125
 126         for (n = 0; n < EV; n++) {
 127                 i = (ec+n) % EV;
 128                 printk(KERN_NOTICE);
 129                 printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]);
 130         }
 131 }
 132
 133
 134 #endif /* CONFIG_ATM_ENI_DEBUG */
 135
 136
 137 /*
 138  * NExx   must not be equal at end
 139  * EExx   may be equal at end
 140  * xxPJOK verify validity of pointer jumps
 141  * xxPMOK operating on a circular buffer of "c" words
 142  */
 143
 144 #define NEPJOK(a0,a1,b) \
 145     ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1))
 146 #define EEPJOK(a0,a1,b) \
 147     ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1))
 148 #define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b)
 149 #define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b)
 150
 151
 152 static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0,
 153   backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0,
 154   putting = 0;
 155
 156 static struct atm_dev *eni_boards = NULL;
 157
 158 static u32 *cpu_zeroes = NULL; /* aligned "magic" zeroes */
 159 static dma_addr_t zeroes;
 160
 161 /* Read/write registers on card */
 162 #define eni_in(r)       readl(eni_dev->reg+(r)*4)
 163 #define eni_out(v,r)    writel((v),eni_dev->reg+(r)*4)
 164
 165
 166 /*-------------------------------- utilities --------------------------------*/
 167
 168
 169 static void dump_mem(struct eni_dev *eni_dev)
 170 {
 171         int i;
 172
 173         for (i = 0; i < eni_dev->free_len; i++)
 174                 printk(KERN_DEBUG "  %d: %p %d\n",i,
 175                     eni_dev->free_list[i].start,
 176                     1 << eni_dev->free_list[i].order);
 177 }
 178
 179
 180 static void dump(struct atm_dev *dev)
 181 {
 182         struct eni_dev *eni_dev;
 183
 184         int i;
 185
 186         eni_dev = ENI_DEV(dev);
 187         printk(KERN_NOTICE "Free memory\n");
 188         dump_mem(eni_dev);
 189         printk(KERN_NOTICE "TX buffers\n");
 190         for (i = 0; i < NR_CHAN; i++)
 191                 if (eni_dev->tx[i].send)
 192                         printk(KERN_NOTICE "  TX %d @ %p: %ld\n",i,
 193                             eni_dev->tx[i].send,eni_dev->tx[i].words*4);
 194         printk(KERN_NOTICE "RX buffers\n");
 195         for (i = 0; i < 1024; i++)
 196                 if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx)
 197                         printk(KERN_NOTICE "  RX %d @ %p: %ld\n",i,
 198                             ENI_VCC(eni_dev->rx_map[i])->recv,
 199                             ENI_VCC(eni_dev->rx_map[i])->words*4);
 200         printk(KERN_NOTICE "----\n");
 201 }
 202
 203
 204 static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start,
 205     unsigned long size)
 206 {
 207         struct eni_free *list;
 208         int len,order;
 209
 210         DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size);
 211         start += eni_dev->base_diff;
 212         list = eni_dev->free_list;
 213         len = eni_dev->free_len;
 214         while (size) {
 215                 if (len >= eni_dev->free_list_size) {
 216                         printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n",
 217                             start,size);
 218                         break;
 219                 }
 220                 for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++);
 221                 if (MID_MIN_BUF_SIZE > (1 << order)) {
 222                         printk(KERN_CRIT "eni_put_free: order %d too small\n",
 223                             order);
 224                         break;
 225                 }
 226                 list[len].start = (void __iomem *) start;
 227                 list[len].order = order;
 228                 len++;
 229                 start += 1 << order;
 230                 size -= 1 << order;
 231         }
 232         eni_dev->free_len = len;
 233         /*dump_mem(eni_dev);*/
 234 }
 235
 236
 237 static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size)
 238 {
 239         struct eni_free *list;
 240         void __iomem *start;
 241         int len,i,order,best_order,index;
 242
 243         list = eni_dev->free_list;
 244         len = eni_dev->free_len;
 245         if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE;
 246         if (*size > MID_MAX_BUF_SIZE) return NULL;
 247         for (order = 0; (1 << order) < *size; order++);
 248         DPRINTK("trying: %ld->%d\n",*size,order);
 249         best_order = 65; /* we don't have more than 2^64 of anything ... */
 250         index = 0; /* silence GCC */
 251         for (i = 0; i < len; i++)
 252                 if (list[i].order == order) {
 253                         best_order = order;
 254                         index = i;
 255                         break;
 256                 }
 257                 else if (best_order > list[i].order && list[i].order > order) {
 258                                 best_order = list[i].order;
 259                                 index = i;
 260                         }
 261         if (best_order == 65) return NULL;
 262         start = list[index].start-eni_dev->base_diff;
 263         list[index] = list[--len];
 264         eni_dev->free_len = len;
 265         *size = 1 << order;
 266         eni_put_free(eni_dev,start+*size,(1 << best_order)-*size);
 267         DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start);
 268         memset_io(start,0,*size);       /* never leak data */
 269         /*dump_mem(eni_dev);*/
 270         return start;
 271 }
 272
 273
 274 static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start,
 275     unsigned long size)
 276 {
 277         struct eni_free *list;
 278         int len,i,order;
 279
 280         start += eni_dev->base_diff;
 281         list = eni_dev->free_list;
 282         len = eni_dev->free_len;
 283         for (order = -1; size; order++) size >>= 1;
 284         DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order);
 285         for (i = 0; i < len; i++)
 286                 if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) &&
 287                     list[i].order == order) {
 288                         DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i,
 289                             list[i].start,start,1 << order,list[i].order,order);
 290                         list[i] = list[--len];
 291                         start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order));
 292                         order++;
 293                         i = -1;
 294                         continue;
 295                 }
 296         if (len >= eni_dev->free_list_size) {
 297                 printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start,
 298                     order);
 299                 return;
 300         }
 301         list[len].start = start;
 302         list[len].order = order;
 303         eni_dev->free_len = len+1;
 304         /*dump_mem(eni_dev);*/
 305 }
 306
 307
 308 /*----------------------------------- RX ------------------------------------*/
 309
 310
 311 #define ENI_VCC_NOS ((struct atm_vcc *) 1)
 312
 313
 314 static void rx_ident_err(struct atm_vcc *vcc)
 315 {
 316         struct atm_dev *dev;
 317         struct eni_dev *eni_dev;
 318         struct eni_vcc *eni_vcc;
 319
 320         dev = vcc->dev;
 321         eni_dev = ENI_DEV(dev);
 322         /* immediately halt adapter */
 323         eni_out(eni_in(MID_MC_S) &
 324             ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S);
 325         /* dump useful information */
 326         eni_vcc = ENI_VCC(vcc);
 327         printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident "
 328             "mismatch\n",dev->number);
 329         printk(KERN_ALERT "  VCI %d, rxing %d, words %ld\n",vcc->vci,
 330             eni_vcc->rxing,eni_vcc->words);
 331         printk(KERN_ALERT "  host descr 0x%lx, rx pos 0x%lx, descr value "
 332             "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos,
 333             (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4));
 334         printk(KERN_ALERT "  last %p, servicing %d\n",eni_vcc->last,
 335             eni_vcc->servicing);
 336         EVENT("---dump ends here---\n",0,0);
 337         printk(KERN_NOTICE "---recent events---\n");
 338         event_dump();
 339         ENI_DEV(dev)->fast = NULL; /* really stop it */
 340         ENI_DEV(dev)->slow = NULL;
 341         skb_queue_head_init(&ENI_DEV(dev)->rx_queue);
 342 }
 343
 344
 345 static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb,
 346     unsigned long skip,unsigned long size,unsigned long eff)
 347 {
 348         struct eni_dev *eni_dev;
 349         struct eni_vcc *eni_vcc;
 350         u32 dma_rd,dma_wr;
 351         u32 dma[RX_DMA_BUF*2];
 352         dma_addr_t paddr;
 353         unsigned long here;
 354         int i,j;
 355
 356         eni_dev = ENI_DEV(vcc->dev);
 357         eni_vcc = ENI_VCC(vcc);
 358         paddr = 0; /* GCC, shut up */
 359         if (skb) {
 360                 paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len,
 361                     PCI_DMA_FROMDEVICE);
 362                 ENI_PRV_PADDR(skb) = paddr;
 363                 if (paddr & 3)
 364                         printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has "
 365                             "mis-aligned RX data (0x%lx)\n",vcc->dev->number,
 366                             vcc->vci,(unsigned long) paddr);
 367                 ENI_PRV_SIZE(skb) = size+skip;
 368                     /* PDU plus descriptor */
 369                 ATM_SKB(skb)->vcc = vcc;
 370         }
 371         j = 0;
 372         if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */
 373                 here = (eni_vcc->descr+skip) & (eni_vcc->words-1);
 374                 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci
 375                     << MID_DMA_VCI_SHIFT) | MID_DT_JK;
 376                 j++;
 377         }
 378         here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1);
 379         if (!eff) size += skip;
 380         else {
 381                 unsigned long words;
 382
 383                 if (!size) {
 384                         DPRINTK("strange things happen ...\n");
 385                         EVENT("strange things happen ... (skip=%ld,eff=%ld)\n",
 386                             size,eff);
 387                 }
 388                 words = eff;
 389                 if (paddr & 15) {
 390                         unsigned long init;
 391
 392                         init = 4-((paddr & 15) >> 2);
 393                         if (init > words) init = words;
 394                         dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
 395                             (vcc->vci << MID_DMA_VCI_SHIFT);
 396                         dma[j++] = paddr;
 397                         paddr += init << 2;
 398                         words -= init;
 399                 }
 400 #ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */
 401                 if (words & ~15) {
 402                         dma[j++] = MID_DT_16W | ((words >> 4) <<
 403                             MID_DMA_COUNT_SHIFT) | (vcc->vci <<
 404                             MID_DMA_VCI_SHIFT);
 405                         dma[j++] = paddr;
 406                         paddr += (words & ~15) << 2;
 407                         words &= 15;
 408                 }
 409 #endif
 410 #ifdef CONFIG_ATM_ENI_BURST_RX_8W  /* works only with *some* PCI chipsets ... */
 411                 if (words & ~7) {
 412                         dma[j++] = MID_DT_8W | ((words >> 3) <<
 413                             MID_DMA_COUNT_SHIFT) | (vcc->vci <<
 414                             MID_DMA_VCI_SHIFT);
 415                         dma[j++] = paddr;
 416                         paddr += (words & ~7) << 2;
 417                         words &= 7;
 418                 }
 419 #endif
 420 #ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */
 421                 if (words & ~3) {
 422                         dma[j++] = MID_DT_4W | ((words >> 2) <<
 423                             MID_DMA_COUNT_SHIFT) | (vcc->vci <<
 424                             MID_DMA_VCI_SHIFT);
 425                         dma[j++] = paddr;
 426                         paddr += (words & ~3) << 2;
 427                         words &= 3;
 428                 }
 429 #endif
 430 #ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */
 431                 if (words & ~1) {
 432                         dma[j++] = MID_DT_2W | ((words >> 1) <<
 433                             MID_DMA_COUNT_SHIFT) | (vcc->vci <<
 434                             MID_DMA_VCI_SHIFT);
 435                         dma[j++] = paddr;
 436                         paddr += (words & ~1) << 2;
 437                         words &= 1;
 438                 }
 439 #endif
 440                 if (words) {
 441                         dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT)
 442                             | (vcc->vci << MID_DMA_VCI_SHIFT);
 443                         dma[j++] = paddr;
 444                 }
 445         }
 446         if (size != eff) {
 447                 dma[j++] = (here << MID_DMA_COUNT_SHIFT) |
 448                     (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK;
 449                 j++;
 450         }
 451         if (!j || j > 2*RX_DMA_BUF) {
 452                 printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n");
 453                 goto trouble;
 454         }
 455         dma[j-2] |= MID_DMA_END;
 456         j = j >> 1;
 457         dma_wr = eni_in(MID_DMA_WR_RX);
 458         dma_rd = eni_in(MID_DMA_RD_RX);
 459         /*
 460          * Can I move the dma_wr pointer by 2j+1 positions without overwriting
 461          * data that hasn't been read (position of dma_rd) yet ?
 462          */
 463         if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */
 464                 printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n",
 465                     vcc->dev->number);
 466                 goto trouble;
 467         }
 468         for (i = 0; i < j; i++) {
 469                 writel(dma[i*2],eni_dev->rx_dma+dma_wr*8);
 470                 writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4);
 471                 dma_wr = (dma_wr+1) & (NR_DMA_RX-1);
 472         }
 473         if (skb) {
 474                 ENI_PRV_POS(skb) = eni_vcc->descr+size+1;
 475                 skb_queue_tail(&eni_dev->rx_queue,skb);
 476                 eni_vcc->last = skb;
 477 rx_enqueued++;
 478         }
 479         eni_vcc->descr = here;
 480         eni_out(dma_wr,MID_DMA_WR_RX);
 481         return 0;
 482
 483 trouble:
 484         if (paddr)
 485                 pci_unmap_single(eni_dev->pci_dev,paddr,skb->len,
 486                     PCI_DMA_FROMDEVICE);
 487         if (skb) dev_kfree_skb_irq(skb);
 488         return -1;
 489 }
 490
 491
 492 static void discard(struct atm_vcc *vcc,unsigned long size)
 493 {
 494         struct eni_vcc *eni_vcc;
 495
 496         eni_vcc = ENI_VCC(vcc);
 497         EVENT("discard (size=%ld)\n",size,0);
 498         while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0);
 499             /* could do a full fallback, but that might be more expensive */
 500         if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1;
 501         else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1);
 502 }
 503
 504
 505 /*
 506  * TODO: should check whether direct copies (without DMA setup, dequeuing on
 507  * interrupt, etc.) aren't much faster for AAL0
 508  */
 509
 510 static int rx_aal0(struct atm_vcc *vcc)
 511 {
 512         struct eni_vcc *eni_vcc;
 513         unsigned long descr;
 514         unsigned long length;
 515         struct sk_buff *skb;
 516
 517         DPRINTK(">rx_aal0\n");
 518         eni_vcc = ENI_VCC(vcc);
 519         descr = readl(eni_vcc->recv+eni_vcc->descr*4);
 520         if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
 521                 rx_ident_err(vcc);
 522                 return 1;
 523         }
 524         if (descr & MID_RED_T) {
 525                 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
 526                     vcc->dev->number);
 527                 length = 0;
 528                 atomic_inc(&vcc->stats->rx_err);
 529         }
 530         else {
 531                 length = ATM_CELL_SIZE-1; /* no HEC */
 532         }
 533         skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL;
 534         if (!skb) {
 535                 discard(vcc,length >> 2);
 536                 return 0;
 537         }
 538         skb_put(skb,length);
 539         skb_set_timestamp(skb, &eni_vcc->timestamp);
 540         DPRINTK("got len %ld\n",length);
 541         if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1;
 542         eni_vcc->rxing++;
 543         return 0;
 544 }
 545
 546
 547 static int rx_aal5(struct atm_vcc *vcc)
 548 {
 549         struct eni_vcc *eni_vcc;
 550         unsigned long descr;
 551         unsigned long size,eff,length;
 552         struct sk_buff *skb;
 553
 554         EVENT("rx_aal5\n",0,0);
 555         DPRINTK(">rx_aal5\n");
 556         eni_vcc = ENI_VCC(vcc);
 557         descr = readl(eni_vcc->recv+eni_vcc->descr*4);
 558         if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
 559                 rx_ident_err(vcc);
 560                 return 1;
 561         }
 562         if (descr & (MID_RED_T | MID_RED_CRC_ERR)) {
 563                 if (descr & MID_RED_T) {
 564                         EVENT("empty cell (descr=0x%lx)\n",descr,0);
 565                         DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
 566                             vcc->dev->number);
 567                         size = 0;
 568                 }
 569                 else {
 570                         static unsigned long silence = 0;
 571
 572                         if (time_after(jiffies, silence) || silence == 0) {
 573                                 printk(KERN_WARNING DEV_LABEL "(itf %d): "
 574                                     "discarding PDU(s) with CRC error\n",
 575                                     vcc->dev->number);
 576                                 silence = (jiffies+2*HZ)|1;
 577                         }
 578                         size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
 579                         EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr,
 580                             size);
 581                 }
 582                 eff = length = 0;
 583                 atomic_inc(&vcc->stats->rx_err);
 584         }
 585         else {
 586                 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
 587                 DPRINTK("size=%ld\n",size);
 588                 length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) &
 589                     (eni_vcc->words-1)))*4) & 0xffff;
 590                                 /* -trailer(2)+header(1) */
 591                 if (length && length <= (size << 2)-8 && length <=
 592                   ATM_MAX_AAL5_PDU) eff = (length+3) >> 2;
 593                 else {                           /* ^ trailer length (8) */
 594                         EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr,
 595                             length);
 596                         printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU "
 597                             "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n",
 598                             vcc->dev->number,vcc->vci,length,size << 2,descr);
 599                         length = eff = 0;
 600                         atomic_inc(&vcc->stats->rx_err);
 601                 }
 602         }
 603         skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL;
 604         if (!skb) {
 605                 discard(vcc,size);
 606                 return 0;
 607         }
 608         skb_put(skb,length);
 609         DPRINTK("got len %ld\n",length);
 610         if (do_rx_dma(vcc,skb,1,size,eff)) return 1;
 611         eni_vcc->rxing++;
 612         return 0;
 613 }
 614
 615
 616 static inline int rx_vcc(struct atm_vcc *vcc)
 617 {
 618         void __iomem *vci_dsc;
 619         unsigned long tmp;
 620         struct eni_vcc *eni_vcc;
 621
 622         eni_vcc = ENI_VCC(vcc);
 623         vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16;
 624         EVENT("rx_vcc(1)\n",0,0);
 625         while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >>
 626             MID_VCI_DESCR_SHIFT)) {
 627                 EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n",
 628                     eni_vcc->descr,tmp);
 629                 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
 630                     (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
 631                     MID_VCI_DESCR_SHIFT));
 632                 if (ENI_VCC(vcc)->rx(vcc)) return 1;
 633         }
 634         /* clear IN_SERVICE flag */
 635         writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc);
 636         /*
 637          * If new data has arrived between evaluating the while condition and
 638          * clearing IN_SERVICE, we wouldn't be notified until additional data
 639          * follows. So we have to loop again to be sure.
 640          */
 641         EVENT("rx_vcc(3)\n",0,0);
 642         while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR)
 643             >> MID_VCI_DESCR_SHIFT)) {
 644                 EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n",
 645                     eni_vcc->descr,tmp);
 646                 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
 647                     (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
 648                     MID_VCI_DESCR_SHIFT));
 649                 if (ENI_VCC(vcc)->rx(vcc)) return 1;
 650         }
 651         return 0;
 652 }
 653
 654
 655 static void poll_rx(struct atm_dev *dev)
 656 {
 657         struct eni_dev *eni_dev;
 658         struct atm_vcc *curr;
 659
 660         eni_dev = ENI_DEV(dev);
 661         while ((curr = eni_dev->fast)) {
 662                 EVENT("poll_rx.fast\n",0,0);
 663                 if (rx_vcc(curr)) return;
 664                 eni_dev->fast = ENI_VCC(curr)->next;
 665                 ENI_VCC(curr)->next = ENI_VCC_NOS;
 666                 barrier();
 667                 ENI_VCC(curr)->servicing--;
 668         }
 669         while ((curr = eni_dev->slow)) {
 670                 EVENT("poll_rx.slow\n",0,0);
 671                 if (rx_vcc(curr)) return;
 672                 eni_dev->slow = ENI_VCC(curr)->next;
 673                 ENI_VCC(curr)->next = ENI_VCC_NOS;
 674                 barrier();
 675                 ENI_VCC(curr)->servicing--;
 676         }
 677 }
 678
 679
 680 static void get_service(struct atm_dev *dev)
 681 {
 682         struct eni_dev *eni_dev;
 683         struct atm_vcc *vcc;
 684         unsigned long vci;
 685
 686         DPRINTK(">get_service\n");
 687         eni_dev = ENI_DEV(dev);
 688         while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) {
 689                 vci = readl(eni_dev->service+eni_dev->serv_read*4);
 690                 eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1);
 691                 vcc = eni_dev->rx_map[vci & 1023];
 692                 if (!vcc) {
 693                         printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not "
 694                             "found\n",dev->number,vci);
 695                         continue; /* nasty but we try to go on anyway */
 696                         /* @@@ nope, doesn't work */
 697                 }
 698                 EVENT("getting from service\n",0,0);
 699                 if (ENI_VCC(vcc)->next != ENI_VCC_NOS) {
 700                         EVENT("double service\n",0,0);
 701                         DPRINTK("Grr, servicing VCC %ld twice\n",vci);
 702                         continue;
 703                 }
 704                 do_gettimeofday(&ENI_VCC(vcc)->timestamp);
 705                 ENI_VCC(vcc)->next = NULL;
 706                 if (vcc->qos.rxtp.traffic_class == ATM_CBR) {
 707                         if (eni_dev->fast)
 708                                 ENI_VCC(eni_dev->last_fast)->next = vcc;
 709                         else eni_dev->fast = vcc;
 710                         eni_dev->last_fast = vcc;
 711                 }
 712                 else {
 713                         if (eni_dev->slow)
 714                                 ENI_VCC(eni_dev->last_slow)->next = vcc;
 715                         else eni_dev->slow = vcc;
 716                         eni_dev->last_slow = vcc;
 717                 }
 718 putting++;
 719                 ENI_VCC(vcc)->servicing++;
 720         }
 721 }
 722
 723
 724 static void dequeue_rx(struct atm_dev *dev)
 725 {
 726         struct eni_dev *eni_dev;
 727         struct eni_vcc *eni_vcc;
 728         struct atm_vcc *vcc;
 729         struct sk_buff *skb;
 730         void __iomem *vci_dsc;
 731         int first;
 732
 733         eni_dev = ENI_DEV(dev);
 734         first = 1;
 735         while (1) {
 736                 skb = skb_dequeue(&eni_dev->rx_queue);
 737                 if (!skb) {
 738                         if (first) {
 739                                 DPRINTK(DEV_LABEL "(itf %d): RX but not "
 740                                     "rxing\n",dev->number);
 741                                 EVENT("nothing to dequeue\n",0,0);
 742                         }
 743                         break;
 744                 }
 745                 EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb),
 746                     ENI_PRV_POS(skb));
 747 rx_dequeued++;
 748                 vcc = ATM_SKB(skb)->vcc;
 749                 eni_vcc = ENI_VCC(vcc);
 750                 first = 0;
 751                 vci_dsc = eni_dev->vci+vcc->vci*16;
 752                 if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb),
 753                     (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT,
 754                     eni_vcc->words)) {
 755                         EVENT("requeuing\n",0,0);
 756                         skb_queue_head(&eni_dev->rx_queue,skb);
 757                         break;
 758                 }
 759                 eni_vcc->rxing--;
 760                 eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1);
 761                 pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len,
 762                     PCI_DMA_TODEVICE);
 763                 if (!skb->len) dev_kfree_skb_irq(skb);
 764                 else {
 765                         EVENT("pushing (len=%ld)\n",skb->len,0);
 766                         if (vcc->qos.aal == ATM_AAL0)
 767                                 *(unsigned long *) skb->data =
 768                                     ntohl(*(unsigned long *) skb->data);
 769                         memset(skb->cb,0,sizeof(struct eni_skb_prv));
 770                         vcc->push(vcc,skb);
 771                         pushed++;
 772                 }
 773                 atomic_inc(&vcc->stats->rx);
 774         }
 775         wake_up(&eni_dev->rx_wait);
 776 }
 777
 778
 779 static int open_rx_first(struct atm_vcc *vcc)
 780 {
 781         struct eni_dev *eni_dev;
 782         struct eni_vcc *eni_vcc;
 783         unsigned long size;
 784
 785         DPRINTK("open_rx_first\n");
 786         eni_dev = ENI_DEV(vcc->dev);
 787         eni_vcc = ENI_VCC(vcc);
 788         eni_vcc->rx = NULL;
 789         if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0;
 790         size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100;
 791         if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <=
 792             MID_MAX_BUF_SIZE)
 793                 size = MID_MAX_BUF_SIZE;
 794         eni_vcc->recv = eni_alloc_mem(eni_dev,&size);
 795         DPRINTK("rx at 0x%lx\n",eni_vcc->recv);
 796         eni_vcc->words = size >> 2;
 797         if (!eni_vcc->recv) return -ENOBUFS;
 798         eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0;
 799         eni_vcc->descr = 0;
 800         eni_vcc->rx_pos = 0;
 801         eni_vcc->rxing = 0;
 802         eni_vcc->servicing = 0;
 803         eni_vcc->next = ENI_VCC_NOS;
 804         return 0;
 805 }
 806
 807
 808 static int open_rx_second(struct atm_vcc *vcc)
 809 {
 810         void __iomem *here;
 811         struct eni_dev *eni_dev;
 812         struct eni_vcc *eni_vcc;
 813         unsigned long size;
 814         int order;
 815
 816         DPRINTK("open_rx_second\n");
 817         eni_dev = ENI_DEV(vcc->dev);
 818         eni_vcc = ENI_VCC(vcc);
 819         if (!eni_vcc->rx) return 0;
 820         /* set up VCI descriptor */
 821         here = eni_dev->vci+vcc->vci*16;
 822         DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4);
 823         size = eni_vcc->words >> 8;
 824         for (order = -1; size; order++) size >>= 1;
 825         writel(0,here+4); /* descr, read = 0 */
 826         writel(0,here+8); /* write, state, count = 0 */
 827         if (eni_dev->rx_map[vcc->vci])
 828                 printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already "
 829                     "in use\n",vcc->dev->number,vcc->vci);
 830         eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */
 831         writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) <<
 832             MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE |
 833             (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) <<
 834             MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here);
 835         return 0;
 836 }
 837
 838
 839 static void close_rx(struct atm_vcc *vcc)
 840 {
 841         DECLARE_WAITQUEUE(wait,current);
 842         void __iomem *here;
 843         struct eni_dev *eni_dev;
 844         struct eni_vcc *eni_vcc;
 845
 846         eni_vcc = ENI_VCC(vcc);
 847         if (!eni_vcc->rx) return;
 848         eni_dev = ENI_DEV(vcc->dev);
 849         if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) {
 850                 here = eni_dev->vci+vcc->vci*16;
 851                 /* block receiver */
 852                 writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH <<
 853                     MID_VCI_MODE_SHIFT),here);
 854                 /* wait for receiver to become idle */
 855                 udelay(27);
 856                 /* discard pending cell */
 857                 writel(readl(here) & ~MID_VCI_IN_SERVICE,here);
 858                 /* don't accept any new ones */
 859                 eni_dev->rx_map[vcc->vci] = NULL;
 860                 /* wait for RX queue to drain */
 861                 DPRINTK("eni_close: waiting for RX ...\n");
 862                 EVENT("RX closing\n",0,0);
 863                 add_wait_queue(&eni_dev->rx_wait,&wait);
 864                 set_current_state(TASK_UNINTERRUPTIBLE);
 865                 barrier();
 866                 for (;;) {
 867                         /* transition service->rx: rxing++, servicing-- */
 868                         if (!eni_vcc->servicing) {
 869                                 barrier();
 870                                 if (!eni_vcc->rxing) break;
 871                         }
 872                         EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing,
 873                             eni_vcc->servicing);
 874                         printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing,
 875                             eni_vcc->rxing);
 876                         schedule();
 877                         set_current_state(TASK_UNINTERRUPTIBLE);
 878                 }
 879                 for (;;) {
 880                         int at_end;
 881                         u32 tmp;
 882
 883                         tasklet_disable(&eni_dev->task);
 884                         tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ;
 885                         at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT;
 886                         tasklet_enable(&eni_dev->task);
 887                         if (at_end) break;
 888                         EVENT("drain discard (host 0x%lx, nic 0x%lx)\n",
 889                             eni_vcc->rx_pos,tmp);
 890                         printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n",
 891                             eni_vcc->rx_pos,tmp);
 892                         schedule();
 893                         set_current_state(TASK_UNINTERRUPTIBLE);
 894                 }
 895                 set_current_state(TASK_RUNNING);
 896                 remove_wait_queue(&eni_dev->rx_wait,&wait);
 897         }
 898         eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2);
 899         eni_vcc->rx = NULL;
 900 }
 901
 902
 903 static int start_rx(struct atm_dev *dev)
 904 {
 905         struct eni_dev *eni_dev;
 906
 907         eni_dev = ENI_DEV(dev);
 908         eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL);
 909         if (!eni_dev->rx_map) {
 910                 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
 911                     dev->number);
 912                 free_page((unsigned long) eni_dev->free_list);
 913                 return -ENOMEM;
 914         }
 915         memset(eni_dev->rx_map,0,PAGE_SIZE);
 916         eni_dev->rx_mult = DEFAULT_RX_MULT;
 917         eni_dev->fast = eni_dev->last_fast = NULL;
 918         eni_dev->slow = eni_dev->last_slow = NULL;
 919         init_waitqueue_head(&eni_dev->rx_wait);
 920         skb_queue_head_init(&eni_dev->rx_queue);
 921         eni_dev->serv_read = eni_in(MID_SERV_WRITE);
 922         eni_out(0,MID_DMA_WR_RX);
 923         return 0;
 924 }
 925
 926
 927 /*----------------------------------- TX ------------------------------------*/
 928
 929
 930 enum enq_res { enq_ok,enq_next,enq_jam };
 931
 932
 933 static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr,
 934     u32 size)
 935 {
 936         u32 init,words;
 937
 938         DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size);
 939         EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size);
 940 #if 0 /* don't complain anymore */
 941         if (paddr & 3)
 942                 printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr);
 943         if (size & 3)
 944                 printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size);
 945 #endif
 946         if (paddr & 3) {
 947                 init = 4-(paddr & 3);
 948                 if (init > size || size < 7) init = size;
 949                 DPRINTK("put_dma: %lx DMA: %d/%d bytes\n",
 950                     (unsigned long) paddr,init,size);
 951                 dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) |
 952                     (chan << MID_DMA_CHAN_SHIFT);
 953                 dma[(*j)++] = paddr;
 954                 paddr += init;
 955                 size -= init;
 956         }
 957         words = size >> 2;
 958         size &= 3;
 959         if (words && (paddr & 31)) {
 960                 init = 8-((paddr & 31) >> 2);
 961                 if (init > words) init = words;
 962                 DPRINTK("put_dma: %lx DMA: %d/%d words\n",
 963                     (unsigned long) paddr,init,words);
 964                 dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
 965                     (chan << MID_DMA_CHAN_SHIFT);
 966                 dma[(*j)++] = paddr;
 967                 paddr += init << 2;
 968                 words -= init;
 969         }
 970 #ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */
 971         if (words & ~15) {
 972                 DPRINTK("put_dma: %lx DMA: %d*16/%d words\n",
 973                     (unsigned long) paddr,words >> 4,words);
 974                 dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT)
 975                     | (chan << MID_DMA_CHAN_SHIFT);
 976                 dma[(*j)++] = paddr;
 977                 paddr += (words & ~15) << 2;
 978                 words &= 15;
 979         }
 980 #endif
 981 #ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */
 982         if (words & ~7) {
 983                 DPRINTK("put_dma: %lx DMA: %d*8/%d words\n",
 984                     (unsigned long) paddr,words >> 3,words);
 985                 dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT)
 986                     | (chan << MID_DMA_CHAN_SHIFT);
 987                 dma[(*j)++] = paddr;
 988                 paddr += (words & ~7) << 2;
 989                 words &= 7;
 990         }
 991 #endif
 992 #ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */
 993         if (words & ~3) {
 994                 DPRINTK("put_dma: %lx DMA: %d*4/%d words\n",
 995                     (unsigned long) paddr,words >> 2,words);
 996                 dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT)
 997                     | (chan << MID_DMA_CHAN_SHIFT);
 998                 dma[(*j)++] = paddr;
 999                 paddr += (words & ~3) << 2;
1000                 words &= 3;
1001         }
1002 #endif
1003 #ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */
1004         if (words & ~1) {
1005                 DPRINTK("put_dma: %lx DMA: %d*2/%d words\n",
1006                     (unsigned long) paddr,words >> 1,words);
1007                 dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT)
1008                     | (chan << MID_DMA_CHAN_SHIFT);
1009                 dma[(*j)++] = paddr;
1010                 paddr += (words & ~1) << 2;
1011                 words &= 1;
1012         }
1013 #endif
1014         if (words) {
1015                 DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr,
1016                     words);
1017                 dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) |
1018                     (chan << MID_DMA_CHAN_SHIFT);
1019                 dma[(*j)++] = paddr;
1020                 paddr += words << 2;
1021         }
1022         if (size) {
1023                 DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr,
1024                     size);
1025                 dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) |
1026                     (chan << MID_DMA_CHAN_SHIFT);
1027                 dma[(*j)++] = paddr;
1028         }
1029 }
1030
1031
1032 static enum enq_res do_tx(struct sk_buff *skb)
1033 {
1034         struct atm_vcc *vcc;
1035         struct eni_dev *eni_dev;
1036         struct eni_vcc *eni_vcc;
1037         struct eni_tx *tx;
1038         dma_addr_t paddr;
1039         u32 dma_rd,dma_wr;
1040         u32 size; /* in words */
1041         int aal5,dma_size,i,j;
1042
1043         DPRINTK(">do_tx\n");
1044         NULLCHECK(skb);
1045         EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len);
1046         vcc = ATM_SKB(skb)->vcc;
1047         NULLCHECK(vcc);
1048         eni_dev = ENI_DEV(vcc->dev);
1049         NULLCHECK(eni_dev);
1050         eni_vcc = ENI_VCC(vcc);
1051         tx = eni_vcc->tx;
1052         NULLCHECK(tx);
1053 #if 0 /* Enable this for testing with the "align" program */
1054         {
1055                 unsigned int hack = *((char *) skb->data)-'0';
1056
1057                 if (hack < 8) {
1058                         skb->data += hack;
1059                         skb->len -= hack;
1060                 }
1061         }
1062 #endif
1063 #if 0 /* should work now */
1064         if ((unsigned long) skb->data & 3)
1065                 printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned "
1066                     "TX data\n",vcc->dev->number,vcc->vci);
1067 #endif
1068         /*
1069          * Potential future IP speedup: make hard_header big enough to put
1070          * segmentation descriptor directly into PDU. Saves: 4 slave writes,
1071          * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-)
1072          */
1073
1074         aal5 = vcc->qos.aal == ATM_AAL5;
1075         /* check space in buffer */
1076         if (!aal5)
1077                 size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE;
1078                         /* cell without HEC plus segmentation header (includes
1079                            four-byte cell header) */
1080         else {
1081                 size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1;
1082                         /* add AAL5 trailer */
1083                 size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE;
1084                                                 /* add segmentation header */
1085         }
1086         /*
1087          * Can I move tx_pos by size bytes without getting closer than TX_GAP
1088          * to the read pointer ? TX_GAP means to leave some space for what
1089          * the manual calls "too close".
1090          */
1091         if (!NEPMOK(tx->tx_pos,size+TX_GAP,
1092             eni_in(MID_TX_RDPTR(tx->index)),tx->words)) {
1093                 DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n",
1094                     vcc->dev->number,size);
1095                 return enq_next;
1096         }
1097         /* check DMA */
1098         dma_wr = eni_in(MID_DMA_WR_TX);
1099         dma_rd = eni_in(MID_DMA_RD_TX);
1100         dma_size = 3; /* JK for descriptor and final fill, plus final size
1101                          mis-alignment fix */
1102 DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags);
1103         if (!skb_shinfo(skb)->nr_frags) dma_size += 5;
1104         else dma_size += 5*(skb_shinfo(skb)->nr_frags+1);
1105         if (dma_size > TX_DMA_BUF) {
1106                 printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries "
1107                     "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF);
1108         }
1109         DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos);
1110         if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) <
1111              dma_size) {
1112                 printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n",
1113                     vcc->dev->number);
1114                 return enq_jam;
1115         }
1116         paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len,
1117             PCI_DMA_TODEVICE);
1118         ENI_PRV_PADDR(skb) = paddr;
1119         /* prepare DMA queue entries */
1120         j = 0;
1121         eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) <<
1122              MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1123              MID_DT_JK;
1124         j++;
1125         if (!skb_shinfo(skb)->nr_frags)
1126                 if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len);
1127                 else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4);
1128         else {
1129 DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */
1130                 for (i = -1; i < skb_shinfo(skb)->nr_frags; i++)
1131                         if (i == -1)
1132                                 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1133                                     skb->data,
1134                                     skb->len - skb->data_len);
1135                         else
1136                                 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1137                                     skb_shinfo(skb)->frags[i].page + skb_shinfo(skb)->frags[i].page_offset,
1138                                     skb_shinfo(skb)->frags[i].size);
1139         }
1140         if (skb->len & 3)
1141                 put_dma(tx->index,eni_dev->dma,&j,zeroes,4-(skb->len & 3));
1142         /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */
1143         eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) <<
1144              MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1145              MID_DMA_END | MID_DT_JK;
1146         j++;
1147         DPRINTK("DMA at end: %d\n",j);
1148         /* store frame */
1149         writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) |
1150             (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) |
1151             (tx->resolution << MID_SEG_RATE_SHIFT) |
1152             (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4);
1153 /*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/
1154         writel((vcc->vci << MID_SEG_VCI_SHIFT) |
1155             (aal5 ? 0 : (skb->data[3] & 0xf)) |
1156             (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0),
1157             tx->send+((tx->tx_pos+1) & (tx->words-1))*4);
1158         DPRINTK("size: %d, len:%d\n",size,skb->len);
1159         if (aal5)
1160                 writel(skb->len,tx->send+
1161                     ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4);
1162         j = j >> 1;
1163         for (i = 0; i < j; i++) {
1164                 writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8);
1165                 writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4);
1166                 dma_wr = (dma_wr+1) & (NR_DMA_TX-1);
1167         }
1168         ENI_PRV_POS(skb) = tx->tx_pos;
1169         ENI_PRV_SIZE(skb) = size;
1170         ENI_VCC(vcc)->txing += size;
1171         tx->tx_pos = (tx->tx_pos+size) & (tx->words-1);
1172         DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos);
1173         eni_out(dma_wr,MID_DMA_WR_TX);
1174         skb_queue_tail(&eni_dev->tx_queue,skb);
1175 queued++;
1176         return enq_ok;
1177 }
1178
1179
1180 static void poll_tx(struct atm_dev *dev)
1181 {
1182         struct eni_tx *tx;
1183         struct sk_buff *skb;
1184         enum enq_res res;
1185         int i;
1186
1187         DPRINTK(">poll_tx\n");
1188         for (i = NR_CHAN-1; i >= 0; i--) {
1189                 tx = &ENI_DEV(dev)->tx[i];
1190                 if (tx->send)
1191                         while ((skb = skb_dequeue(&tx->backlog))) {
1192                                 res = do_tx(skb);
1193                                 if (res == enq_ok) continue;
1194                                 DPRINTK("re-queuing TX PDU\n");
1195                                 skb_queue_head(&tx->backlog,skb);
1196 requeued++;
1197                                 if (res == enq_jam) return;
1198                                 break;
1199                         }
1200         }
1201 }
1202
1203
1204 static void dequeue_tx(struct atm_dev *dev)
1205 {
1206         struct eni_dev *eni_dev;
1207         struct atm_vcc *vcc;
1208         struct sk_buff *skb;
1209         struct eni_tx *tx;
1210
1211         NULLCHECK(dev);
1212         eni_dev = ENI_DEV(dev);
1213         NULLCHECK(eni_dev);
1214         while ((skb = skb_dequeue(&eni_dev->tx_queue))) {
1215                 vcc = ATM_SKB(skb)->vcc;
1216                 NULLCHECK(vcc);
1217                 tx = ENI_VCC(vcc)->tx;
1218                 NULLCHECK(ENI_VCC(vcc)->tx);
1219                 DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb),
1220                     (unsigned) eni_in(MID_TX_DESCRSTART(tx->index)));
1221                 if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) ==
1222                     eni_in(MID_TX_DESCRSTART(tx->index))) {
1223                         skb_queue_head(&eni_dev->tx_queue,skb);
1224                         break;
1225                 }
1226                 ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb);
1227                 pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len,
1228                     PCI_DMA_TODEVICE);
1229                 if (vcc->pop) vcc->pop(vcc,skb);
1230                 else dev_kfree_skb_irq(skb);
1231                 atomic_inc(&vcc->stats->tx);
1232                 wake_up(&eni_dev->tx_wait);
1233 dma_complete++;
1234         }
1235 }
1236
1237
1238 static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr)
1239 {
1240         int i;
1241
1242         for (i = !ubr; i < NR_CHAN; i++)
1243                 if (!eni_dev->tx[i].send) return eni_dev->tx+i;
1244         return NULL;
1245 }
1246
1247
1248 static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre,
1249     int *res,int unlimited)
1250 {
1251         static const int pre_div[] = { 4,16,128,2048 };
1252             /* 2^(((x+2)^2-(x+2))/2+1) */
1253
1254         if (unlimited) *pre = *res = 0;
1255         else {
1256                 if (*pcr > 0) {
1257                         int div;
1258
1259                         for (*pre = 0; *pre < 3; (*pre)++)
1260                                 if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break;
1261                         div = pre_div[*pre]**pcr;
1262                         DPRINTK("min div %d\n",div);
1263                         *res = TS_CLOCK/div-1;
1264                 }
1265                 else {
1266                         int div;
1267
1268                         if (!*pcr) *pcr = eni_dev->tx_bw+reserved;
1269                         for (*pre = 3; *pre >= 0; (*pre)--)
1270                                 if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break;
1271                         if (*pre < 3) (*pre)++; /* else fail later */
1272                         div = pre_div[*pre]*-*pcr;
1273                         DPRINTK("max div %d\n",div);
1274                         *res = (TS_CLOCK+div-1)/div-1;
1275                 }
1276                 if (*res < 0) *res = 0;
1277                 if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE;
1278         }
1279         *pcr = TS_CLOCK/pre_div[*pre]/(*res+1);
1280         DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res);
1281         return 0;
1282 }
1283
1284
1285 static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp,
1286     int set_rsv,int set_shp)
1287 {
1288         struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1289         struct eni_vcc *eni_vcc = ENI_VCC(vcc);
1290         struct eni_tx *tx;
1291         unsigned long size;
1292         void __iomem *mem;
1293         int rate,ubr,unlimited,new_tx;
1294         int pre,res,order;
1295         int error;
1296
1297         rate = atm_pcr_goal(txtp);
1298         ubr = txtp->traffic_class == ATM_UBR;
1299         unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR ||
1300             rate >= ATM_OC3_PCR);
1301         if (!unlimited) {
1302                 size = txtp->max_sdu*eni_dev->tx_mult/100;
1303                 if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <=
1304                     MID_MAX_BUF_SIZE)
1305                         size = MID_MAX_BUF_SIZE;
1306         }
1307         else {
1308                 if (eni_dev->ubr) {
1309                         eni_vcc->tx = eni_dev->ubr;
1310                         txtp->pcr = ATM_OC3_PCR;
1311                         return 0;
1312                 }
1313                 size = UBR_BUFFER;
1314         }
1315         new_tx = !eni_vcc->tx;
1316         mem = NULL; /* for gcc */
1317         if (!new_tx) tx = eni_vcc->tx;
1318         else {
1319                 mem = eni_alloc_mem(eni_dev,&size);
1320                 if (!mem) return -ENOBUFS;
1321                 tx = alloc_tx(eni_dev,unlimited);
1322                 if (!tx) {
1323                         eni_free_mem(eni_dev,mem,size);
1324                         return -EBUSY;
1325                 }
1326                 DPRINTK("got chan %d\n",tx->index);
1327                 tx->reserved = tx->shaping = 0;
1328                 tx->send = mem;
1329                 tx->words = size >> 2;
1330                 skb_queue_head_init(&tx->backlog);
1331                 for (order = 0; size > (1 << (order+10)); order++);
1332                 eni_out((order << MID_SIZE_SHIFT) |
1333                     ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)),
1334                     MID_TX_PLACE(tx->index));
1335                 tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) &
1336                     MID_DESCR_START;
1337         }
1338         error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited);
1339         if (!error  && txtp->min_pcr > rate) error = -EINVAL;
1340         if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR &&
1341             txtp->max_pcr < rate) error = -EINVAL;
1342         if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved)
1343                 error = -EINVAL;
1344         if (!error && set_rsv && !set_shp && rate < tx->shaping)
1345                 error = -EINVAL;
1346         if (!error && !set_rsv && rate > tx->reserved && !ubr)
1347                 error = -EINVAL;
1348         if (error) {
1349                 if (new_tx) {
1350                         tx->send = NULL;
1351                         eni_free_mem(eni_dev,mem,size);
1352                 }
1353                 return error;
1354         }
1355         txtp->pcr = rate;
1356         if (set_rsv && !ubr) {
1357                 eni_dev->tx_bw += tx->reserved;
1358                 tx->reserved = rate;
1359                 eni_dev->tx_bw -= rate;
1360         }
1361         if (set_shp || (unlimited && new_tx)) {
1362                 if (unlimited && new_tx) eni_dev->ubr = tx;
1363                 tx->prescaler = pre;
1364                 tx->resolution = res;
1365                 tx->shaping = rate;
1366         }
1367         if (set_shp) eni_vcc->tx = tx;
1368         DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping);
1369         return 0;
1370 }
1371
1372
1373 static int open_tx_first(struct atm_vcc *vcc)
1374 {
1375         ENI_VCC(vcc)->tx = NULL;
1376         if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0;
1377         ENI_VCC(vcc)->txing = 0;
1378         return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1);
1379 }
1380
1381
1382 static int open_tx_second(struct atm_vcc *vcc)
1383 {
1384         return 0; /* nothing to do */
1385 }
1386
1387
1388 static void close_tx(struct atm_vcc *vcc)
1389 {
1390         DECLARE_WAITQUEUE(wait,current);
1391         struct eni_dev *eni_dev;
1392         struct eni_vcc *eni_vcc;
1393
1394         eni_vcc = ENI_VCC(vcc);
1395         if (!eni_vcc->tx) return;
1396         eni_dev = ENI_DEV(vcc->dev);
1397         /* wait for TX queue to drain */
1398         DPRINTK("eni_close: waiting for TX ...\n");
1399         add_wait_queue(&eni_dev->tx_wait,&wait);
1400         set_current_state(TASK_UNINTERRUPTIBLE);
1401         for (;;) {
1402                 int txing;
1403
1404                 tasklet_disable(&eni_dev->task);
1405                 txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing;
1406                 tasklet_enable(&eni_dev->task);
1407                 if (!txing) break;
1408                 DPRINTK("%d TX left\n",eni_vcc->txing);
1409                 schedule();
1410                 set_current_state(TASK_UNINTERRUPTIBLE);
1411         }
1412         set_current_state(TASK_RUNNING);
1413         remove_wait_queue(&eni_dev->tx_wait,&wait);
1414         if (eni_vcc->tx != eni_dev->ubr) {
1415                 /*
1416                  * Looping a few times in here is probably far cheaper than
1417                  * keeping track of TX completions all the time, so let's poll
1418                  * a bit ...
1419                  */
1420                 while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) !=
1421                     eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index)))
1422                         schedule();
1423                 eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2);
1424                 eni_vcc->tx->send = NULL;
1425                 eni_dev->tx_bw += eni_vcc->tx->reserved;
1426         }
1427         eni_vcc->tx = NULL;
1428 }
1429
1430
1431 static int start_tx(struct atm_dev *dev)
1432 {
1433         struct eni_dev *eni_dev;
1434         int i;
1435
1436         eni_dev = ENI_DEV(dev);
1437         eni_dev->lost = 0;
1438         eni_dev->tx_bw = ATM_OC3_PCR;
1439         eni_dev->tx_mult = DEFAULT_TX_MULT;
1440         init_waitqueue_head(&eni_dev->tx_wait);
1441         eni_dev->ubr = NULL;
1442         skb_queue_head_init(&eni_dev->tx_queue);
1443         eni_out(0,MID_DMA_WR_TX);
1444         for (i = 0; i < NR_CHAN; i++) {
1445                 eni_dev->tx[i].send = NULL;
1446                 eni_dev->tx[i].index = i;
1447         }
1448         return 0;
1449 }
1450
1451
1452 /*--------------------------------- common ----------------------------------*/
1453
1454
1455 #if 0 /* may become useful again when tuning things */
1456
1457 static void foo(void)
1458 {
1459 printk(KERN_INFO
1460   "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n"
1461   "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n",
1462   tx_complete,dma_complete,queued,requeued,submitted,backlogged,
1463   rx_enqueued,rx_dequeued,putting,pushed);
1464 if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost);
1465 }
1466
1467 #endif
1468
1469
1470 static void bug_int(struct atm_dev *dev,unsigned long reason)
1471 {
1472         struct eni_dev *eni_dev;
1473
1474         DPRINTK(">bug_int\n");
1475         eni_dev = ENI_DEV(dev);
1476         if (reason & MID_DMA_ERR_ACK)
1477                 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1478                     "error\n",dev->number);
1479         if (reason & MID_TX_IDENT_MISM)
1480                 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident "
1481                     "mismatch\n",dev->number);
1482         if (reason & MID_TX_DMA_OVFL)
1483                 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1484                     "overflow\n",dev->number);
1485         EVENT("---dump ends here---\n",0,0);
1486         printk(KERN_NOTICE "---recent events---\n");
1487         event_dump();
1488 }
1489
1490
1491 static irqreturn_t eni_int(int irq,void *dev_id)
1492 {
1493         struct atm_dev *dev;
1494         struct eni_dev *eni_dev;
1495         u32 reason;
1496
1497         DPRINTK(">eni_int\n");
1498         dev = dev_id;
1499         eni_dev = ENI_DEV(dev);
1500         reason = eni_in(MID_ISA);
1501         DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason);
1502         /*
1503          * Must handle these two right now, because reading ISA doesn't clear
1504          * them, so they re-occur and we never make it to the tasklet. Since
1505          * they're rare, we don't mind the occasional invocation of eni_tasklet
1506          * with eni_dev->events == 0.
1507          */
1508         if (reason & MID_STAT_OVFL) {
1509                 EVENT("stat overflow\n",0,0);
1510                 eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH;
1511         }
1512         if (reason & MID_SUNI_INT) {
1513                 EVENT("SUNI int\n",0,0);
1514                 dev->phy->interrupt(dev);
1515 #if 0
1516                 foo();
1517 #endif
1518         }
1519         spin_lock(&eni_dev->lock);
1520         eni_dev->events |= reason;
1521         spin_unlock(&eni_dev->lock);
1522         tasklet_schedule(&eni_dev->task);
1523         return IRQ_HANDLED;
1524 }
1525
1526
1527 static void eni_tasklet(unsigned long data)
1528 {
1529         struct atm_dev *dev = (struct atm_dev *) data;
1530         struct eni_dev *eni_dev = ENI_DEV(dev);
1531         unsigned long flags;
1532         u32 events;
1533
1534         DPRINTK("eni_tasklet (dev %p)\n",dev);
1535         spin_lock_irqsave(&eni_dev->lock,flags);
1536         events = xchg(&eni_dev->events,0);
1537         spin_unlock_irqrestore(&eni_dev->lock,flags);
1538         if (events & MID_RX_DMA_COMPLETE) {
1539                 EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0);
1540                 dequeue_rx(dev);
1541                 EVENT("dequeue_rx done, starting poll_rx\n",0,0);
1542                 poll_rx(dev);
1543                 EVENT("poll_rx done\n",0,0);
1544                 /* poll_tx ? */
1545         }
1546         if (events & MID_SERVICE) {
1547                 EVENT("INT: service, starting get_service\n",0,0);
1548                 get_service(dev);
1549                 EVENT("get_service done, starting poll_rx\n",0,0);
1550                 poll_rx(dev);
1551                 EVENT("poll_rx done\n",0,0);
1552         }
1553         if (events & MID_TX_DMA_COMPLETE) {
1554                 EVENT("INT: TX DMA COMPLETE\n",0,0);
1555                 dequeue_tx(dev);
1556         }
1557         if (events & MID_TX_COMPLETE) {
1558                 EVENT("INT: TX COMPLETE\n",0,0);
1559 tx_complete++;
1560                 wake_up(&eni_dev->tx_wait);
1561                 /* poll_rx ? */
1562         }
1563         if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) {
1564                 EVENT("bug interrupt\n",0,0);
1565                 bug_int(dev,events);
1566         }
1567         poll_tx(dev);
1568 }
1569
1570
1571 /*--------------------------------- entries ---------------------------------*/
1572
1573
1574 static const char *media_name[] __devinitdata = {
1575     "MMF", "SMF", "MMF", "03?", /*  0- 3 */
1576     "UTP", "05?", "06?", "07?", /*  4- 7 */
1577     "TAXI","09?", "10?", "11?", /*  8-11 */
1578     "12?", "13?", "14?", "15?", /* 12-15 */
1579     "MMF", "SMF", "18?", "19?", /* 16-19 */
1580     "UTP", "21?", "22?", "23?", /* 20-23 */
1581     "24?", "25?", "26?", "27?", /* 24-27 */
1582     "28?", "29?", "30?", "31?"  /* 28-31 */
1583 };
1584
1585
1586 #define SET_SEPROM \
1587   ({ if (!error && !pci_error) { \
1588     pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \
1589     udelay(10); /* 10 usecs */ \
1590   } })
1591 #define GET_SEPROM \
1592   ({ if (!error && !pci_error) { \
1593     pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \
1594     udelay(10); /* 10 usecs */ \
1595   } })
1596
1597
1598 static int __devinit get_esi_asic(struct atm_dev *dev)
1599 {
1600         struct eni_dev *eni_dev;
1601         unsigned char tonga;
1602         int error,failed,pci_error;
1603         int address,i,j;
1604
1605         eni_dev = ENI_DEV(dev);
1606         error = pci_error = 0;
1607         tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK;
1608         SET_SEPROM;
1609         for (i = 0; i < ESI_LEN && !error && !pci_error; i++) {
1610                 /* start operation */
1611                 tonga |= SEPROM_DATA;
1612                 SET_SEPROM;
1613                 tonga |= SEPROM_CLK;
1614                 SET_SEPROM;
1615                 tonga &= ~SEPROM_DATA;
1616                 SET_SEPROM;
1617                 tonga &= ~SEPROM_CLK;
1618                 SET_SEPROM;
1619                 /* send address */
1620                 address = ((i+SEPROM_ESI_BASE) << 1)+1;
1621                 for (j = 7; j >= 0; j--) {
1622                         tonga = (address >> j) & 1 ? tonga | SEPROM_DATA :
1623                             tonga & ~SEPROM_DATA;
1624                         SET_SEPROM;
1625                         tonga |= SEPROM_CLK;
1626                         SET_SEPROM;
1627                         tonga &= ~SEPROM_CLK;
1628                         SET_SEPROM;
1629                 }
1630                 /* get ack */
1631                 tonga |= SEPROM_DATA;
1632                 SET_SEPROM;
1633                 tonga |= SEPROM_CLK;
1634                 SET_SEPROM;
1635                 GET_SEPROM;
1636                 failed = tonga & SEPROM_DATA;
1637                 tonga &= ~SEPROM_CLK;
1638                 SET_SEPROM;
1639                 tonga |= SEPROM_DATA;
1640                 SET_SEPROM;
1641                 if (failed) error = -EIO;
1642                 else {
1643                         dev->esi[i] = 0;
1644                         for (j = 7; j >= 0; j--) {
1645                                 dev->esi[i] <<= 1;
1646                                 tonga |= SEPROM_DATA;
1647                                 SET_SEPROM;
1648                                 tonga |= SEPROM_CLK;
1649                                 SET_SEPROM;
1650                                 GET_SEPROM;
1651                                 if (tonga & SEPROM_DATA) dev->esi[i] |= 1;
1652                                 tonga &= ~SEPROM_CLK;
1653                                 SET_SEPROM;
1654                                 tonga |= SEPROM_DATA;
1655                                 SET_SEPROM;
1656                         }
1657                         /* get ack */
1658                         tonga |= SEPROM_DATA;
1659                         SET_SEPROM;
1660                         tonga |= SEPROM_CLK;
1661                         SET_SEPROM;
1662                         GET_SEPROM;
1663                         if (!(tonga & SEPROM_DATA)) error = -EIO;
1664                         tonga &= ~SEPROM_CLK;
1665                         SET_SEPROM;
1666                         tonga |= SEPROM_DATA;
1667                         SET_SEPROM;
1668                 }
1669                 /* stop operation */
1670                 tonga &= ~SEPROM_DATA;
1671                 SET_SEPROM;
1672                 tonga |= SEPROM_CLK;
1673                 SET_SEPROM;
1674                 tonga |= SEPROM_DATA;
1675                 SET_SEPROM;
1676         }
1677         if (pci_error) {
1678                 printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI "
1679                     "(0x%02x)\n",dev->number,pci_error);
1680                 error = -EIO;
1681         }
1682         return error;
1683 }
1684
1685
1686 #undef SET_SEPROM
1687 #undef GET_SEPROM
1688
1689
1690 static int __devinit get_esi_fpga(struct atm_dev *dev, void __iomem *base)
1691 {
1692         void __iomem *mac_base;
1693         int i;
1694
1695         mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom);
1696         for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3));
1697         return 0;
1698 }
1699
1700
1701 static int __devinit eni_do_init(struct atm_dev *dev)
1702 {
1703         struct midway_eprom __iomem *eprom;
1704         struct eni_dev *eni_dev;
1705         struct pci_dev *pci_dev;
1706         unsigned long real_base;
1707         void __iomem *base;
1708         unsigned char revision;
1709         int error,i,last;
1710
1711         DPRINTK(">eni_init\n");
1712         dev->ci_range.vpi_bits = 0;
1713         dev->ci_range.vci_bits = NR_VCI_LD;
1714         dev->link_rate = ATM_OC3_PCR;
1715         eni_dev = ENI_DEV(dev);
1716         pci_dev = eni_dev->pci_dev;
1717         real_base = pci_resource_start(pci_dev, 0);
1718         eni_dev->irq = pci_dev->irq;
1719         error = pci_read_config_byte(pci_dev,PCI_REVISION_ID,&revision);
1720         if (error) {
1721                 printk(KERN_ERR DEV_LABEL "(itf %d): init error 0x%02x\n",
1722                     dev->number,error);
1723                 return -EINVAL;
1724         }
1725         if ((error = pci_write_config_word(pci_dev,PCI_COMMAND,
1726             PCI_COMMAND_MEMORY |
1727             (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1728                 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory "
1729                     "(0x%02x)\n",dev->number,error);
1730                 return -EIO;
1731         }
1732         printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,",
1733             dev->number,revision,real_base,eni_dev->irq);
1734         if (!(base = ioremap_nocache(real_base,MAP_MAX_SIZE))) {
1735                 printk("\n");
1736                 printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page "
1737                     "mapping\n",dev->number);
1738                 return error;
1739         }
1740         eni_dev->base_diff = real_base - (unsigned long) base;
1741         /* id may not be present in ASIC Tonga boards - check this @@@ */
1742         if (!eni_dev->asic) {
1743                 eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom));
1744                 if (readl(&eprom->magic) != ENI155_MAGIC) {
1745                         printk("\n");
1746                         printk(KERN_ERR KERN_ERR DEV_LABEL "(itf %d): bad "
1747                             "magic - expected 0x%x, got 0x%x\n",dev->number,
1748                             ENI155_MAGIC,(unsigned) readl(&eprom->magic));
1749                         return -EINVAL;
1750                 }
1751         }
1752         eni_dev->phy = base+PHY_BASE;
1753         eni_dev->reg = base+REG_BASE;
1754         eni_dev->ram = base+RAM_BASE;
1755         last = MAP_MAX_SIZE-RAM_BASE;
1756         for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) {
1757                 writel(0x55555555,eni_dev->ram+i);
1758                 if (readl(eni_dev->ram+i) != 0x55555555) last = i;
1759                 else {
1760                         writel(0xAAAAAAAA,eni_dev->ram+i);
1761                         if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i;
1762                         else writel(i,eni_dev->ram+i);
1763                 }
1764         }
1765         for (i = 0; i < last; i += RAM_INCREMENT)
1766                 if (readl(eni_dev->ram+i) != i) break;
1767         eni_dev->mem = i;
1768         memset_io(eni_dev->ram,0,eni_dev->mem);
1769         /* TODO: should shrink allocation now */
1770         printk("mem=%dkB (",eni_dev->mem >> 10);
1771         /* TODO: check for non-SUNI, check for TAXI ? */
1772         if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) {
1773                 printk(")\n");
1774                 printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n",
1775                     dev->number,(unsigned) eni_in(MID_RES_ID_MCON));
1776                 return -EINVAL;
1777         }
1778         error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base);
1779         if (error) return error;
1780         for (i = 0; i < ESI_LEN; i++)
1781                 printk("%s%02X",i ? "-" : "",dev->esi[i]);
1782         printk(")\n");
1783         printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number,
1784             eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA",
1785             media_name[eni_in(MID_RES_ID_MCON) & DAUGTHER_ID]);
1786         return suni_init(dev);
1787 }
1788
1789
1790 static int __devinit eni_start(struct atm_dev *dev)
1791 {
1792         struct eni_dev *eni_dev;
1793
1794         void __iomem *buf;
1795         unsigned long buffer_mem;
1796         int error;
1797
1798         DPRINTK(">eni_start\n");
1799         eni_dev = ENI_DEV(dev);
1800         if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) {
1801                 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
1802                     dev->number,eni_dev->irq);
1803                 error = -EAGAIN;
1804                 goto out;
1805         }
1806         pci_set_master(eni_dev->pci_dev);
1807         if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND,
1808             PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
1809             (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1810                 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+"
1811                     "master (0x%02x)\n",dev->number,error);
1812                 goto free_irq;
1813         }
1814         if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,
1815             END_SWAP_DMA))) {
1816                 printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap "
1817                     "(0x%02x)\n",dev->number,error);
1818                 goto free_irq;
1819         }
1820         /* determine addresses of internal tables */
1821         eni_dev->vci = eni_dev->ram;
1822         eni_dev->rx_dma = eni_dev->ram+NR_VCI*16;
1823         eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8;
1824         eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8;
1825         buf = eni_dev->service+NR_SERVICE*4;
1826         DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n",
1827              eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma,
1828              eni_dev->service,buf);
1829         spin_lock_init(&eni_dev->lock);
1830         tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev);
1831         eni_dev->events = 0;
1832         /* initialize memory management */
1833         buffer_mem = eni_dev->mem - (buf - eni_dev->ram);
1834         eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2;
1835         eni_dev->free_list = (struct eni_free *) kmalloc(
1836             sizeof(struct eni_free)*(eni_dev->free_list_size+1),GFP_KERNEL);
1837         if (!eni_dev->free_list) {
1838                 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
1839                     dev->number);
1840                 error = -ENOMEM;
1841                 goto free_irq;
1842         }
1843         eni_dev->free_len = 0;
1844         eni_put_free(eni_dev,buf,buffer_mem);
1845         memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */
1846         /*
1847          * byte_addr  free (k)
1848          * 0x00000000     512  VCI table
1849          * 0x00004000     496  RX DMA
1850          * 0x00005000     492  TX DMA
1851          * 0x00006000     488  service list
1852          * 0x00007000     484  buffers
1853          * 0x00080000       0  end (512kB)
1854          */
1855         eni_out(0xffffffff,MID_IE);
1856         error = start_tx(dev);
1857         if (error) goto free_list;
1858         error = start_rx(dev);
1859         if (error) goto free_list;
1860         error = dev->phy->start(dev);
1861         if (error) goto free_list;
1862         eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) |
1863             MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE,
1864             MID_MC_S);
1865             /* Tonga uses SBus INTReq1 */
1866         (void) eni_in(MID_ISA); /* clear Midway interrupts */
1867         return 0;
1868
1869 free_list:
1870         kfree(eni_dev->free_list);
1871
1872 free_irq:
1873         free_irq(eni_dev->irq, eni_dev);
1874
1875 out:
1876         return error;
1877 }
1878
1879
1880 static void eni_close(struct atm_vcc *vcc)
1881 {
1882         DPRINTK(">eni_close\n");
1883         if (!ENI_VCC(vcc)) return;
1884         clear_bit(ATM_VF_READY,&vcc->flags);
1885         close_rx(vcc);
1886         close_tx(vcc);
1887         DPRINTK("eni_close: done waiting\n");
1888         /* deallocate memory */
1889         kfree(ENI_VCC(vcc));
1890         vcc->dev_data = NULL;
1891         clear_bit(ATM_VF_ADDR,&vcc->flags);
1892         /*foo();*/
1893 }
1894
1895
1896 static int eni_open(struct atm_vcc *vcc)
1897 {
1898         struct eni_dev *eni_dev;
1899         struct eni_vcc *eni_vcc;
1900         int error;
1901         short vpi = vcc->vpi;
1902         int vci = vcc->vci;
1903
1904         DPRINTK(">eni_open\n");
1905         EVENT("eni_open\n",0,0);
1906         if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1907                 vcc->dev_data = NULL;
1908         eni_dev = ENI_DEV(vcc->dev);
1909         if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
1910                 set_bit(ATM_VF_ADDR,&vcc->flags);
1911         if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5)
1912                 return -EINVAL;
1913         DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi,
1914             vcc->vci);
1915         if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
1916                 eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL);
1917                 if (!eni_vcc) return -ENOMEM;
1918                 vcc->dev_data = eni_vcc;
1919                 eni_vcc->tx = NULL; /* for eni_close after open_rx */
1920                 if ((error = open_rx_first(vcc))) {
1921                         eni_close(vcc);
1922                         return error;
1923                 }
1924                 if ((error = open_tx_first(vcc))) {
1925                         eni_close(vcc);
1926                         return error;
1927                 }
1928         }
1929         if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0;
1930         if ((error = open_rx_second(vcc))) {
1931                 eni_close(vcc);
1932                 return error;
1933         }
1934         if ((error = open_tx_second(vcc))) {
1935                 eni_close(vcc);
1936                 return error;
1937         }
1938         set_bit(ATM_VF_READY,&vcc->flags);
1939         /* should power down SUNI while !ref_count @@@ */
1940         return 0;
1941 }
1942
1943
1944 static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs)
1945 {
1946         struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1947         struct eni_tx *tx = ENI_VCC(vcc)->tx;
1948         struct sk_buff *skb;
1949         int error,rate,rsv,shp;
1950
1951         if (qos->txtp.traffic_class == ATM_NONE) return 0;
1952         if (tx == eni_dev->ubr) return -EBADFD;
1953         rate = atm_pcr_goal(&qos->txtp);
1954         if (rate < 0) rate = -rate;
1955         rsv = shp = 0;
1956         if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1;
1957         if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1;
1958         if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1;
1959         if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1;
1960         if (!rsv && !shp) return 0;
1961         error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp);
1962         if (error) return error;
1963         if (shp && !(flgs & ATM_MF_IMMED)) return 0;
1964         /*
1965          * Walk through the send buffer and patch the rate information in all
1966          * segmentation buffer descriptors of this VCC.
1967          */
1968         tasklet_disable(&eni_dev->task);
1969         skb_queue_walk(&eni_dev->tx_queue, skb) {
1970                 void __iomem *dsc;
1971
1972                 if (ATM_SKB(skb)->vcc != vcc) continue;
1973                 dsc = tx->send+ENI_PRV_POS(skb)*4;
1974                 writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) |
1975                     (tx->prescaler << MID_SEG_PR_SHIFT) |
1976                     (tx->resolution << MID_SEG_RATE_SHIFT), dsc);
1977         }
1978         tasklet_enable(&eni_dev->task);
1979         return 0;
1980 }
1981
1982
1983 static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
1984 {
1985         struct eni_dev *eni_dev = ENI_DEV(dev);
1986
1987         if (cmd == ENI_MEMDUMP) {
1988                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1989                 printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d "
1990                     "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number);
1991                 dump(dev);
1992                 return 0;
1993         }
1994         if (cmd == ENI_SETMULT) {
1995                 struct eni_multipliers mult;
1996
1997                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1998                 if (copy_from_user(&mult, arg,
1999                     sizeof(struct eni_multipliers)))
2000                         return -EFAULT;
2001                 if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) ||
2002                     mult.tx > 65536 || mult.rx > 65536)
2003                         return -EINVAL;
2004                 if (mult.tx) eni_dev->tx_mult = mult.tx;
2005                 if (mult.rx) eni_dev->rx_mult = mult.rx;
2006                 return 0;
2007         }
2008         if (cmd == ATM_SETCIRANGE) {
2009                 struct atm_cirange ci;
2010
2011                 if (copy_from_user(&ci, arg,sizeof(struct atm_cirange)))
2012                         return -EFAULT;
2013                 if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) &&
2014                     (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX))
2015                     return 0;
2016                 return -EINVAL;
2017         }
2018         if (!dev->phy->ioctl) return -ENOIOCTLCMD;
2019         return dev->phy->ioctl(dev,cmd,arg);
2020 }
2021
2022
2023 static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname,
2024     void __user *optval,int optlen)
2025 {
2026         return -EINVAL;
2027 }
2028
2029
2030 static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname,
2031     void __user *optval,int optlen)
2032 {
2033         return -EINVAL;
2034 }
2035
2036
2037 static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb)
2038 {
2039         enum enq_res res;
2040
2041         DPRINTK(">eni_send\n");
2042         if (!ENI_VCC(vcc)->tx) {
2043                 if (vcc->pop) vcc->pop(vcc,skb);
2044                 else dev_kfree_skb(skb);
2045                 return -EINVAL;
2046         }
2047         if (!skb) {
2048                 printk(KERN_CRIT "!skb in eni_send ?\n");
2049                 if (vcc->pop) vcc->pop(vcc,skb);
2050                 return -EINVAL;
2051         }
2052         if (vcc->qos.aal == ATM_AAL0) {
2053                 if (skb->len != ATM_CELL_SIZE-1) {
2054                         if (vcc->pop) vcc->pop(vcc,skb);
2055                         else dev_kfree_skb(skb);
2056                         return -EINVAL;
2057                 }
2058                 *(u32 *) skb->data = htonl(*(u32 *) skb->data);
2059         }
2060 submitted++;
2061         ATM_SKB(skb)->vcc = vcc;
2062         tasklet_disable(&ENI_DEV(vcc->dev)->task);
2063         res = do_tx(skb);
2064         tasklet_enable(&ENI_DEV(vcc->dev)->task);
2065         if (res == enq_ok) return 0;
2066         skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb);
2067 backlogged++;
2068         tasklet_schedule(&ENI_DEV(vcc->dev)->task);
2069         return 0;
2070 }
2071
2072 static void eni_phy_put(struct atm_dev *dev,unsigned char value,
2073     unsigned long addr)
2074 {
2075         writel(value,ENI_DEV(dev)->phy+addr*4);
2076 }
2077
2078
2079
2080 static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr)
2081 {
2082         return readl(ENI_DEV(dev)->phy+addr*4);
2083 }
2084
2085
2086 static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page)
2087 {
2088         struct hlist_node *node;
2089         struct sock *s;
2090         static const char *signal[] = { "LOST","unknown","okay" };
2091         struct eni_dev *eni_dev = ENI_DEV(dev);
2092         struct atm_vcc *vcc;
2093         int left,i;
2094
2095         left = *pos;
2096         if (!left)
2097                 return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, "
2098                     "%d cps remaining\n",dev->number,signal[(int) dev->signal],
2099                     eni_dev->mem >> 10,eni_dev->tx_bw);
2100         if (!--left)
2101                 return sprintf(page,"%4sBursts: TX"
2102 #if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \
2103     !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \
2104     !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \
2105     !defined(CONFIG_ATM_ENI_BURST_TX_2W)
2106                     " none"
2107 #endif
2108 #ifdef CONFIG_ATM_ENI_BURST_TX_16W
2109                     " 16W"
2110 #endif
2111 #ifdef CONFIG_ATM_ENI_BURST_TX_8W
2112                     " 8W"
2113 #endif
2114 #ifdef CONFIG_ATM_ENI_BURST_TX_4W
2115                     " 4W"
2116 #endif
2117 #ifdef CONFIG_ATM_ENI_BURST_TX_2W
2118                     " 2W"
2119 #endif
2120                     ", RX"
2121 #if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \
2122     !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \
2123     !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \
2124     !defined(CONFIG_ATM_ENI_BURST_RX_2W)
2125                     " none"
2126 #endif
2127 #ifdef CONFIG_ATM_ENI_BURST_RX_16W
2128                     " 16W"
2129 #endif
2130 #ifdef CONFIG_ATM_ENI_BURST_RX_8W
2131                     " 8W"
2132 #endif
2133 #ifdef CONFIG_ATM_ENI_BURST_RX_4W
2134                     " 4W"
2135 #endif
2136 #ifdef CONFIG_ATM_ENI_BURST_RX_2W
2137                     " 2W"
2138 #endif
2139 #ifndef CONFIG_ATM_ENI_TUNE_BURST
2140                     " (default)"
2141 #endif
2142                     "\n","");
2143         if (!--left)
2144                 return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n",
2145                     "",eni_dev->tx_mult,eni_dev->rx_mult);
2146         for (i = 0; i < NR_CHAN; i++) {
2147                 struct eni_tx *tx = eni_dev->tx+i;
2148
2149                 if (!tx->send) continue;
2150                 if (!--left) {
2151                         return sprintf(page,"tx[%d]:    0x%ld-0x%ld "
2152                             "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i,
2153                             (unsigned long) (tx->send - eni_dev->ram),
2154                             tx->send-eni_dev->ram+tx->words*4-1,tx->words*4,
2155                             tx->reserved,tx->shaping,
2156                             tx == eni_dev->ubr ? " (UBR)" : "");
2157                 }
2158                 if (--left) continue;
2159                 return sprintf(page,"%10sbacklog %u packets\n","",
2160                     skb_queue_len(&tx->backlog));
2161         }
2162         read_lock(&vcc_sklist_lock);
2163         for(i = 0; i < VCC_HTABLE_SIZE; ++i) {
2164                 struct hlist_head *head = &vcc_hash[i];
2165
2166                 sk_for_each(s, node, head) {
2167                         struct eni_vcc *eni_vcc;
2168                         int length;
2169
2170                         vcc = atm_sk(s);
2171                         if (vcc->dev != dev)
2172                                 continue;
2173                         eni_vcc = ENI_VCC(vcc);
2174                         if (--left) continue;
2175                         length = sprintf(page,"vcc %4d: ",vcc->vci);
2176                         if (eni_vcc->rx) {
2177                                 length += sprintf(page+length,"0x%ld-0x%ld "
2178                                     "(%6ld bytes)",
2179                                     (unsigned long) (eni_vcc->recv - eni_dev->ram),
2180                                     eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1,
2181                                     eni_vcc->words*4);
2182                                 if (eni_vcc->tx) length += sprintf(page+length,", ");
2183                         }
2184                         if (eni_vcc->tx)
2185                                 length += sprintf(page+length,"tx[%d], txing %d bytes",
2186                                     eni_vcc->tx->index,eni_vcc->txing);
2187                         page[length] = '\n';
2188                         read_unlock(&vcc_sklist_lock);
2189                         return length+1;
2190                 }
2191         }
2192         read_unlock(&vcc_sklist_lock);
2193         for (i = 0; i < eni_dev->free_len; i++) {
2194                 struct eni_free *fe = eni_dev->free_list+i;
2195                 unsigned long offset;
2196
2197                 if (--left) continue;
2198                 offset = (unsigned long) eni_dev->ram+eni_dev->base_diff;
2199                 return sprintf(page,"free      %p-%p (%6d bytes)\n",
2200                     fe->start-offset,fe->start-offset+(1 << fe->order)-1,
2201                     1 << fe->order);
2202         }
2203         return 0;
2204 }
2205
2206
2207 static const struct atmdev_ops ops = {
2208         .open           = eni_open,
2209         .close          = eni_close,
2210         .ioctl          = eni_ioctl,
2211         .getsockopt     = eni_getsockopt,
2212         .setsockopt     = eni_setsockopt,
2213         .send           = eni_send,
2214         .phy_put        = eni_phy_put,
2215         .phy_get        = eni_phy_get,
2216         .change_qos     = eni_change_qos,
2217         .proc_read      = eni_proc_read
2218 };
2219
2220
2221 static int __devinit eni_init_one(struct pci_dev *pci_dev,
2222     const struct pci_device_id *ent)
2223 {
2224         struct atm_dev *dev;
2225         struct eni_dev *eni_dev;
2226         int error = -ENOMEM;
2227
2228         DPRINTK("eni_init_one\n");
2229
2230         if (pci_enable_device(pci_dev)) {
2231                 error = -EIO;
2232                 goto out0;
2233         }
2234
2235         eni_dev = (struct eni_dev *) kmalloc(sizeof(struct eni_dev),GFP_KERNEL);
2236         if (!eni_dev) goto out0;
2237         if (!cpu_zeroes) {
2238                 cpu_zeroes = pci_alloc_consistent(pci_dev,ENI_ZEROES_SIZE,
2239                     &zeroes);
2240                 if (!cpu_zeroes) goto out1;
2241         }
2242         dev = atm_dev_register(DEV_LABEL,&ops,-1,NULL);
2243         if (!dev) goto out2;
2244         pci_set_drvdata(pci_dev, dev);
2245         eni_dev->pci_dev = pci_dev;
2246         dev->dev_data = eni_dev;
2247         eni_dev->asic = ent->driver_data;
2248         error = eni_do_init(dev);
2249         if (error) goto out3;
2250         error = eni_start(dev);
2251         if (error) goto out3;
2252         eni_dev->more = eni_boards;
2253         eni_boards = dev;
2254         return 0;
2255 out3:
2256         atm_dev_deregister(dev);
2257 out2:
2258         pci_free_consistent(eni_dev->pci_dev,ENI_ZEROES_SIZE,cpu_zeroes,zeroes);
2259         cpu_zeroes = NULL;
2260 out1:
2261         kfree(eni_dev);
2262 out0:
2263         return error;
2264 }
2265
2266
2267 static struct pci_device_id eni_pci_tbl[] = {
2268         { PCI_VENDOR_ID_EF, PCI_DEVICE_ID_EF_ATM_FPGA, PCI_ANY_ID, PCI_ANY_ID,
2269           0, 0, 0 /* FPGA */ },
2270         { PCI_VENDOR_ID_EF, PCI_DEVICE_ID_EF_ATM_ASIC, PCI_ANY_ID, PCI_ANY_ID,
2271           0, 0, 1 /* ASIC */ },
2272         { 0, }
2273 };
2274 MODULE_DEVICE_TABLE(pci,eni_pci_tbl);
2275
2276
2277 static void __devexit eni_remove_one(struct pci_dev *pci_dev)
2278 {
2279         /* grrr */
2280 }
2281
2282
2283 static struct pci_driver eni_driver = {
2284         .name           = DEV_LABEL,
2285         .id_table       = eni_pci_tbl,
2286         .probe          = eni_init_one,
2287         .remove         = __devexit_p(eni_remove_one),
2288 };
2289
2290
2291 static int __init eni_init(void)
2292 {
2293         struct sk_buff *skb; /* dummy for sizeof */
2294
2295         if (sizeof(skb->cb) < sizeof(struct eni_skb_prv)) {
2296                 printk(KERN_ERR "eni_detect: skb->cb is too small (%Zd < %Zd)\n",
2297                     sizeof(skb->cb),sizeof(struct eni_skb_prv));
2298                 return -EIO;
2299         }
2300         return pci_register_driver(&eni_driver);
2301 }
2302
2303
2304 module_init(eni_init);
2305 /* @@@ since exit routine not defined, this module can not be unloaded */
2306
2307 MODULE_LICENSE("GPL");