drivers/atm/eni.c

   1 /* drivers/atm/eni.c - Efficient Networks ENI155P device driver */
   2
   3 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
   4
   5
   6 #include <linux/module.h>
   7 #include <linux/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 <linux/slab.h>
  22 #include <asm/io.h>
  23 #include <linux/atomic.h>
  24 #include <linux/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 /* Read/write registers on card */
 159 #define eni_in(r)       readl(eni_dev->reg+(r)*4)
 160 #define eni_out(v,r)    writel((v),eni_dev->reg+(r)*4)
 161
 162
 163 /*-------------------------------- utilities --------------------------------*/
 164
 165
 166 static void dump_mem(struct eni_dev *eni_dev)
 167 {
 168         int i;
 169
 170         for (i = 0; i < eni_dev->free_len; i++)
 171                 printk(KERN_DEBUG "  %d: %p %d\n",i,
 172                     eni_dev->free_list[i].start,
 173                     1 << eni_dev->free_list[i].order);
 174 }
 175
 176
 177 static void dump(struct atm_dev *dev)
 178 {
 179         struct eni_dev *eni_dev;
 180
 181         int i;
 182
 183         eni_dev = ENI_DEV(dev);
 184         printk(KERN_NOTICE "Free memory\n");
 185         dump_mem(eni_dev);
 186         printk(KERN_NOTICE "TX buffers\n");
 187         for (i = 0; i < NR_CHAN; i++)
 188                 if (eni_dev->tx[i].send)
 189                         printk(KERN_NOTICE "  TX %d @ %p: %ld\n",i,
 190                             eni_dev->tx[i].send,eni_dev->tx[i].words*4);
 191         printk(KERN_NOTICE "RX buffers\n");
 192         for (i = 0; i < 1024; i++)
 193                 if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx)
 194                         printk(KERN_NOTICE "  RX %d @ %p: %ld\n",i,
 195                             ENI_VCC(eni_dev->rx_map[i])->recv,
 196                             ENI_VCC(eni_dev->rx_map[i])->words*4);
 197         printk(KERN_NOTICE "----\n");
 198 }
 199
 200
 201 static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start,
 202     unsigned long size)
 203 {
 204         struct eni_free *list;
 205         int len,order;
 206
 207         DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size);
 208         start += eni_dev->base_diff;
 209         list = eni_dev->free_list;
 210         len = eni_dev->free_len;
 211         while (size) {
 212                 if (len >= eni_dev->free_list_size) {
 213                         printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n",
 214                             start,size);
 215                         break;
 216                 }
 217                 for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++);
 218                 if (MID_MIN_BUF_SIZE > (1 << order)) {
 219                         printk(KERN_CRIT "eni_put_free: order %d too small\n",
 220                             order);
 221                         break;
 222                 }
 223                 list[len].start = (void __iomem *) start;
 224                 list[len].order = order;
 225                 len++;
 226                 start += 1 << order;
 227                 size -= 1 << order;
 228         }
 229         eni_dev->free_len = len;
 230         /*dump_mem(eni_dev);*/
 231 }
 232
 233
 234 static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size)
 235 {
 236         struct eni_free *list;
 237         void __iomem *start;
 238         int len,i,order,best_order,index;
 239
 240         list = eni_dev->free_list;
 241         len = eni_dev->free_len;
 242         if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE;
 243         if (*size > MID_MAX_BUF_SIZE) return NULL;
 244         for (order = 0; (1 << order) < *size; order++)
 245                 ;
 246         DPRINTK("trying: %ld->%d\n",*size,order);
 247         best_order = 65; /* we don't have more than 2^64 of anything ... */
 248         index = 0; /* silence GCC */
 249         for (i = 0; i < len; i++)
 250                 if (list[i].order == order) {
 251                         best_order = order;
 252                         index = i;
 253                         break;
 254                 }
 255                 else if (best_order > list[i].order && list[i].order > order) {
 256                                 best_order = list[i].order;
 257                                 index = i;
 258                         }
 259         if (best_order == 65) return NULL;
 260         start = list[index].start-eni_dev->base_diff;
 261         list[index] = list[--len];
 262         eni_dev->free_len = len;
 263         *size = 1 << order;
 264         eni_put_free(eni_dev,start+*size,(1 << best_order)-*size);
 265         DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start);
 266         memset_io(start,0,*size);       /* never leak data */
 267         /*dump_mem(eni_dev);*/
 268         return start;
 269 }
 270
 271
 272 static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start,
 273     unsigned long size)
 274 {
 275         struct eni_free *list;
 276         int len,i,order;
 277
 278         start += eni_dev->base_diff;
 279         list = eni_dev->free_list;
 280         len = eni_dev->free_len;
 281         for (order = -1; size; order++) size >>= 1;
 282         DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order);
 283         for (i = 0; i < len; i++)
 284                 if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) &&
 285                     list[i].order == order) {
 286                         DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i,
 287                             list[i].start,start,1 << order,list[i].order,order);
 288                         list[i] = list[--len];
 289                         start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order));
 290                         order++;
 291                         i = -1;
 292                         continue;
 293                 }
 294         if (len >= eni_dev->free_list_size) {
 295                 printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start,
 296                     order);
 297                 return;
 298         }
 299         list[len].start = start;
 300         list[len].order = order;
 301         eni_dev->free_len = len+1;
 302         /*dump_mem(eni_dev);*/
 303 }
 304
 305
 306 /*----------------------------------- RX ------------------------------------*/
 307
 308
 309 #define ENI_VCC_NOS ((struct atm_vcc *) 1)
 310
 311
 312 static void rx_ident_err(struct atm_vcc *vcc)
 313 {
 314         struct atm_dev *dev;
 315         struct eni_dev *eni_dev;
 316         struct eni_vcc *eni_vcc;
 317
 318         dev = vcc->dev;
 319         eni_dev = ENI_DEV(dev);
 320         /* immediately halt adapter */
 321         eni_out(eni_in(MID_MC_S) &
 322             ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S);
 323         /* dump useful information */
 324         eni_vcc = ENI_VCC(vcc);
 325         printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident "
 326             "mismatch\n",dev->number);
 327         printk(KERN_ALERT "  VCI %d, rxing %d, words %ld\n",vcc->vci,
 328             eni_vcc->rxing,eni_vcc->words);
 329         printk(KERN_ALERT "  host descr 0x%lx, rx pos 0x%lx, descr value "
 330             "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos,
 331             (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4));
 332         printk(KERN_ALERT "  last %p, servicing %d\n",eni_vcc->last,
 333             eni_vcc->servicing);
 334         EVENT("---dump ends here---\n",0,0);
 335         printk(KERN_NOTICE "---recent events---\n");
 336         event_dump();
 337         ENI_DEV(dev)->fast = NULL; /* really stop it */
 338         ENI_DEV(dev)->slow = NULL;
 339         skb_queue_head_init(&ENI_DEV(dev)->rx_queue);
 340 }
 341
 342
 343 static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb,
 344     unsigned long skip,unsigned long size,unsigned long eff)
 345 {
 346         struct eni_dev *eni_dev;
 347         struct eni_vcc *eni_vcc;
 348         u32 dma_rd,dma_wr;
 349         u32 dma[RX_DMA_BUF*2];
 350         dma_addr_t paddr;
 351         unsigned long here;
 352         int i,j;
 353
 354         eni_dev = ENI_DEV(vcc->dev);
 355         eni_vcc = ENI_VCC(vcc);
 356         paddr = 0; /* GCC, shut up */
 357         if (skb) {
 358                 paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len,
 359                                        DMA_FROM_DEVICE);
 360                 if (dma_mapping_error(&eni_dev->pci_dev->dev, paddr))
 361                         goto dma_map_error;
 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                 dma_unmap_single(&eni_dev->pci_dev->dev,paddr,skb->len,
 486                                  DMA_FROM_DEVICE);
 487 dma_map_error:
 488         if (skb) dev_kfree_skb_irq(skb);
 489         return -1;
 490 }
 491
 492
 493 static void discard(struct atm_vcc *vcc,unsigned long size)
 494 {
 495         struct eni_vcc *eni_vcc;
 496
 497         eni_vcc = ENI_VCC(vcc);
 498         EVENT("discard (size=%ld)\n",size,0);
 499         while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0);
 500             /* could do a full fallback, but that might be more expensive */
 501         if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1;
 502         else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1);
 503 }
 504
 505
 506 /*
 507  * TODO: should check whether direct copies (without DMA setup, dequeuing on
 508  * interrupt, etc.) aren't much faster for AAL0
 509  */
 510
 511 static int rx_aal0(struct atm_vcc *vcc)
 512 {
 513         struct eni_vcc *eni_vcc;
 514         unsigned long descr;
 515         unsigned long length;
 516         struct sk_buff *skb;
 517
 518         DPRINTK(">rx_aal0\n");
 519         eni_vcc = ENI_VCC(vcc);
 520         descr = readl(eni_vcc->recv+eni_vcc->descr*4);
 521         if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
 522                 rx_ident_err(vcc);
 523                 return 1;
 524         }
 525         if (descr & MID_RED_T) {
 526                 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
 527                     vcc->dev->number);
 528                 length = 0;
 529                 atomic_inc(&vcc->stats->rx_err);
 530         }
 531         else {
 532                 length = ATM_CELL_SIZE-1; /* no HEC */
 533         }
 534         skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL;
 535         if (!skb) {
 536                 discard(vcc,length >> 2);
 537                 return 0;
 538         }
 539         skb_put(skb,length);
 540         skb->tstamp = eni_vcc->timestamp;
 541         DPRINTK("got len %ld\n",length);
 542         if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1;
 543         eni_vcc->rxing++;
 544         return 0;
 545 }
 546
 547
 548 static int rx_aal5(struct atm_vcc *vcc)
 549 {
 550         struct eni_vcc *eni_vcc;
 551         unsigned long descr;
 552         unsigned long size,eff,length;
 553         struct sk_buff *skb;
 554
 555         EVENT("rx_aal5\n",0,0);
 556         DPRINTK(">rx_aal5\n");
 557         eni_vcc = ENI_VCC(vcc);
 558         descr = readl(eni_vcc->recv+eni_vcc->descr*4);
 559         if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
 560                 rx_ident_err(vcc);
 561                 return 1;
 562         }
 563         if (descr & (MID_RED_T | MID_RED_CRC_ERR)) {
 564                 if (descr & MID_RED_T) {
 565                         EVENT("empty cell (descr=0x%lx)\n",descr,0);
 566                         DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
 567                             vcc->dev->number);
 568                         size = 0;
 569                 }
 570                 else {
 571                         static unsigned long silence = 0;
 572
 573                         if (time_after(jiffies, silence) || silence == 0) {
 574                                 printk(KERN_WARNING DEV_LABEL "(itf %d): "
 575                                     "discarding PDU(s) with CRC error\n",
 576                                     vcc->dev->number);
 577                                 silence = (jiffies+2*HZ)|1;
 578                         }
 579                         size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
 580                         EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr,
 581                             size);
 582                 }
 583                 eff = length = 0;
 584                 atomic_inc(&vcc->stats->rx_err);
 585         }
 586         else {
 587                 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
 588                 DPRINTK("size=%ld\n",size);
 589                 length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) &
 590                     (eni_vcc->words-1)))*4) & 0xffff;
 591                                 /* -trailer(2)+header(1) */
 592                 if (length && length <= (size << 2)-8 && length <=
 593                   ATM_MAX_AAL5_PDU) eff = (length+3) >> 2;
 594                 else {                           /* ^ trailer length (8) */
 595                         EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr,
 596                             length);
 597                         printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU "
 598                             "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n",
 599                             vcc->dev->number,vcc->vci,length,size << 2,descr);
 600                         length = eff = 0;
 601                         atomic_inc(&vcc->stats->rx_err);
 602                 }
 603         }
 604         skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL;
 605         if (!skb) {
 606                 discard(vcc,size);
 607                 return 0;
 608         }
 609         skb_put(skb,length);
 610         DPRINTK("got len %ld\n",length);
 611         if (do_rx_dma(vcc,skb,1,size,eff)) return 1;
 612         eni_vcc->rxing++;
 613         return 0;
 614 }
 615
 616
 617 static inline int rx_vcc(struct atm_vcc *vcc)
 618 {
 619         void __iomem *vci_dsc;
 620         unsigned long tmp;
 621         struct eni_vcc *eni_vcc;
 622
 623         eni_vcc = ENI_VCC(vcc);
 624         vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16;
 625         EVENT("rx_vcc(1)\n",0,0);
 626         while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >>
 627             MID_VCI_DESCR_SHIFT)) {
 628                 EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n",
 629                     eni_vcc->descr,tmp);
 630                 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
 631                     (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
 632                     MID_VCI_DESCR_SHIFT));
 633                 if (ENI_VCC(vcc)->rx(vcc)) return 1;
 634         }
 635         /* clear IN_SERVICE flag */
 636         writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc);
 637         /*
 638          * If new data has arrived between evaluating the while condition and
 639          * clearing IN_SERVICE, we wouldn't be notified until additional data
 640          * follows. So we have to loop again to be sure.
 641          */
 642         EVENT("rx_vcc(3)\n",0,0);
 643         while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR)
 644             >> MID_VCI_DESCR_SHIFT)) {
 645                 EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n",
 646                     eni_vcc->descr,tmp);
 647                 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
 648                     (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
 649                     MID_VCI_DESCR_SHIFT));
 650                 if (ENI_VCC(vcc)->rx(vcc)) return 1;
 651         }
 652         return 0;
 653 }
 654
 655
 656 static void poll_rx(struct atm_dev *dev)
 657 {
 658         struct eni_dev *eni_dev;
 659         struct atm_vcc *curr;
 660
 661         eni_dev = ENI_DEV(dev);
 662         while ((curr = eni_dev->fast)) {
 663                 EVENT("poll_rx.fast\n",0,0);
 664                 if (rx_vcc(curr)) return;
 665                 eni_dev->fast = ENI_VCC(curr)->next;
 666                 ENI_VCC(curr)->next = ENI_VCC_NOS;
 667                 barrier();
 668                 ENI_VCC(curr)->servicing--;
 669         }
 670         while ((curr = eni_dev->slow)) {
 671                 EVENT("poll_rx.slow\n",0,0);
 672                 if (rx_vcc(curr)) return;
 673                 eni_dev->slow = ENI_VCC(curr)->next;
 674                 ENI_VCC(curr)->next = ENI_VCC_NOS;
 675                 barrier();
 676                 ENI_VCC(curr)->servicing--;
 677         }
 678 }
 679
 680
 681 static void get_service(struct atm_dev *dev)
 682 {
 683         struct eni_dev *eni_dev;
 684         struct atm_vcc *vcc;
 685         unsigned long vci;
 686
 687         DPRINTK(">get_service\n");
 688         eni_dev = ENI_DEV(dev);
 689         while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) {
 690                 vci = readl(eni_dev->service+eni_dev->serv_read*4);
 691                 eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1);
 692                 vcc = eni_dev->rx_map[vci & 1023];
 693                 if (!vcc) {
 694                         printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not "
 695                             "found\n",dev->number,vci);
 696                         continue; /* nasty but we try to go on anyway */
 697                         /* @@@ nope, doesn't work */
 698                 }
 699                 EVENT("getting from service\n",0,0);
 700                 if (ENI_VCC(vcc)->next != ENI_VCC_NOS) {
 701                         EVENT("double service\n",0,0);
 702                         DPRINTK("Grr, servicing VCC %ld twice\n",vci);
 703                         continue;
 704                 }
 705                 ENI_VCC(vcc)->timestamp = ktime_get_real();
 706                 ENI_VCC(vcc)->next = NULL;
 707                 if (vcc->qos.rxtp.traffic_class == ATM_CBR) {
 708                         if (eni_dev->fast)
 709                                 ENI_VCC(eni_dev->last_fast)->next = vcc;
 710                         else eni_dev->fast = vcc;
 711                         eni_dev->last_fast = vcc;
 712                 }
 713                 else {
 714                         if (eni_dev->slow)
 715                                 ENI_VCC(eni_dev->last_slow)->next = vcc;
 716                         else eni_dev->slow = vcc;
 717                         eni_dev->last_slow = vcc;
 718                 }
 719                 putting++;
 720                 ENI_VCC(vcc)->servicing++;
 721         }
 722 }
 723
 724
 725 static void dequeue_rx(struct atm_dev *dev)
 726 {
 727         struct eni_dev *eni_dev;
 728         struct eni_vcc *eni_vcc;
 729         struct atm_vcc *vcc;
 730         struct sk_buff *skb;
 731         void __iomem *vci_dsc;
 732         int first;
 733
 734         eni_dev = ENI_DEV(dev);
 735         first = 1;
 736         while (1) {
 737                 skb = skb_dequeue(&eni_dev->rx_queue);
 738                 if (!skb) {
 739                         if (first) {
 740                                 DPRINTK(DEV_LABEL "(itf %d): RX but not "
 741                                     "rxing\n",dev->number);
 742                                 EVENT("nothing to dequeue\n",0,0);
 743                         }
 744                         break;
 745                 }
 746                 EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb),
 747                     ENI_PRV_POS(skb));
 748                 rx_dequeued++;
 749                 vcc = ATM_SKB(skb)->vcc;
 750                 eni_vcc = ENI_VCC(vcc);
 751                 first = 0;
 752                 vci_dsc = eni_dev->vci+vcc->vci*16;
 753                 if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb),
 754                     (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT,
 755                     eni_vcc->words)) {
 756                         EVENT("requeuing\n",0,0);
 757                         skb_queue_head(&eni_dev->rx_queue,skb);
 758                         break;
 759                 }
 760                 eni_vcc->rxing--;
 761                 eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1);
 762                 dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len,
 763                                  DMA_TO_DEVICE);
 764                 if (!skb->len) dev_kfree_skb_irq(skb);
 765                 else {
 766                         EVENT("pushing (len=%ld)\n",skb->len,0);
 767                         if (vcc->qos.aal == ATM_AAL0)
 768                                 *(unsigned long *) skb->data =
 769                                     ntohl(*(unsigned long *) skb->data);
 770                         memset(skb->cb,0,sizeof(struct eni_skb_prv));
 771                         vcc->push(vcc,skb);
 772                         pushed++;
 773                 }
 774                 atomic_inc(&vcc->stats->rx);
 775         }
 776         wake_up(&eni_dev->rx_wait);
 777 }
 778
 779
 780 static int open_rx_first(struct atm_vcc *vcc)
 781 {
 782         struct eni_dev *eni_dev;
 783         struct eni_vcc *eni_vcc;
 784         unsigned long size;
 785
 786         DPRINTK("open_rx_first\n");
 787         eni_dev = ENI_DEV(vcc->dev);
 788         eni_vcc = ENI_VCC(vcc);
 789         eni_vcc->rx = NULL;
 790         if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0;
 791         size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100;
 792         if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <=
 793             MID_MAX_BUF_SIZE)
 794                 size = MID_MAX_BUF_SIZE;
 795         eni_vcc->recv = eni_alloc_mem(eni_dev,&size);
 796         DPRINTK("rx at 0x%lx\n",eni_vcc->recv);
 797         eni_vcc->words = size >> 2;
 798         if (!eni_vcc->recv) return -ENOBUFS;
 799         eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0;
 800         eni_vcc->descr = 0;
 801         eni_vcc->rx_pos = 0;
 802         eni_vcc->rxing = 0;
 803         eni_vcc->servicing = 0;
 804         eni_vcc->next = ENI_VCC_NOS;
 805         return 0;
 806 }
 807
 808
 809 static int open_rx_second(struct atm_vcc *vcc)
 810 {
 811         void __iomem *here;
 812         struct eni_dev *eni_dev;
 813         struct eni_vcc *eni_vcc;
 814         unsigned long size;
 815         int order;
 816
 817         DPRINTK("open_rx_second\n");
 818         eni_dev = ENI_DEV(vcc->dev);
 819         eni_vcc = ENI_VCC(vcc);
 820         if (!eni_vcc->rx) return 0;
 821         /* set up VCI descriptor */
 822         here = eni_dev->vci+vcc->vci*16;
 823         DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4);
 824         size = eni_vcc->words >> 8;
 825         for (order = -1; size; order++) size >>= 1;
 826         writel(0,here+4); /* descr, read = 0 */
 827         writel(0,here+8); /* write, state, count = 0 */
 828         if (eni_dev->rx_map[vcc->vci])
 829                 printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already "
 830                     "in use\n",vcc->dev->number,vcc->vci);
 831         eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */
 832         writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) <<
 833             MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE |
 834             (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) <<
 835             MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here);
 836         return 0;
 837 }
 838
 839
 840 static void close_rx(struct atm_vcc *vcc)
 841 {
 842         DECLARE_WAITQUEUE(wait,current);
 843         void __iomem *here;
 844         struct eni_dev *eni_dev;
 845         struct eni_vcc *eni_vcc;
 846
 847         eni_vcc = ENI_VCC(vcc);
 848         if (!eni_vcc->rx) return;
 849         eni_dev = ENI_DEV(vcc->dev);
 850         if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) {
 851                 here = eni_dev->vci+vcc->vci*16;
 852                 /* block receiver */
 853                 writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH <<
 854                     MID_VCI_MODE_SHIFT),here);
 855                 /* wait for receiver to become idle */
 856                 udelay(27);
 857                 /* discard pending cell */
 858                 writel(readl(here) & ~MID_VCI_IN_SERVICE,here);
 859                 /* don't accept any new ones */
 860                 eni_dev->rx_map[vcc->vci] = NULL;
 861                 /* wait for RX queue to drain */
 862                 DPRINTK("eni_close: waiting for RX ...\n");
 863                 EVENT("RX closing\n",0,0);
 864                 add_wait_queue(&eni_dev->rx_wait,&wait);
 865                 set_current_state(TASK_UNINTERRUPTIBLE);
 866                 barrier();
 867                 for (;;) {
 868                         /* transition service->rx: rxing++, servicing-- */
 869                         if (!eni_vcc->servicing) {
 870                                 barrier();
 871                                 if (!eni_vcc->rxing) break;
 872                         }
 873                         EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing,
 874                             eni_vcc->servicing);
 875                         printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing,
 876                             eni_vcc->rxing);
 877                         schedule();
 878                         set_current_state(TASK_UNINTERRUPTIBLE);
 879                 }
 880                 for (;;) {
 881                         int at_end;
 882                         u32 tmp;
 883
 884                         tasklet_disable(&eni_dev->task);
 885                         tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ;
 886                         at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT;
 887                         tasklet_enable(&eni_dev->task);
 888                         if (at_end) break;
 889                         EVENT("drain discard (host 0x%lx, nic 0x%lx)\n",
 890                             eni_vcc->rx_pos,tmp);
 891                         printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n",
 892                             eni_vcc->rx_pos,tmp);
 893                         schedule();
 894                         set_current_state(TASK_UNINTERRUPTIBLE);
 895                 }
 896                 set_current_state(TASK_RUNNING);
 897                 remove_wait_queue(&eni_dev->rx_wait,&wait);
 898         }
 899         eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2);
 900         eni_vcc->rx = NULL;
 901 }
 902
 903
 904 static int start_rx(struct atm_dev *dev)
 905 {
 906         struct eni_dev *eni_dev;
 907
 908         eni_dev = ENI_DEV(dev);
 909         eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL);
 910         if (!eni_dev->rx_map) {
 911                 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
 912                     dev->number);
 913                 free_page((unsigned long) eni_dev->free_list);
 914                 return -ENOMEM;
 915         }
 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 = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len,
1117                                DMA_TO_DEVICE);
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_headlen(skb));
1135                         else
1136                                 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1137                                     skb_frag_page(&skb_shinfo(skb)->frags[i]) +
1138                                         skb_shinfo(skb)->frags[i].page_offset,
1139                                     skb_frag_size(&skb_shinfo(skb)->frags[i]));
1140         }
1141         if (skb->len & 3) {
1142                 put_dma(tx->index, eni_dev->dma, &j, eni_dev->zero.dma,
1143                         4 - (skb->len & 3));
1144         }
1145         /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */
1146         eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) <<
1147              MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1148              MID_DMA_END | MID_DT_JK;
1149         j++;
1150         DPRINTK("DMA at end: %d\n",j);
1151         /* store frame */
1152         writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) |
1153             (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) |
1154             (tx->resolution << MID_SEG_RATE_SHIFT) |
1155             (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4);
1156 /*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/
1157         writel((vcc->vci << MID_SEG_VCI_SHIFT) |
1158             (aal5 ? 0 : (skb->data[3] & 0xf)) |
1159             (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0),
1160             tx->send+((tx->tx_pos+1) & (tx->words-1))*4);
1161         DPRINTK("size: %d, len:%d\n",size,skb->len);
1162         if (aal5)
1163                 writel(skb->len,tx->send+
1164                     ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4);
1165         j = j >> 1;
1166         for (i = 0; i < j; i++) {
1167                 writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8);
1168                 writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4);
1169                 dma_wr = (dma_wr+1) & (NR_DMA_TX-1);
1170         }
1171         ENI_PRV_POS(skb) = tx->tx_pos;
1172         ENI_PRV_SIZE(skb) = size;
1173         ENI_VCC(vcc)->txing += size;
1174         tx->tx_pos = (tx->tx_pos+size) & (tx->words-1);
1175         DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos);
1176         eni_out(dma_wr,MID_DMA_WR_TX);
1177         skb_queue_tail(&eni_dev->tx_queue,skb);
1178         queued++;
1179         return enq_ok;
1180 }
1181
1182
1183 static void poll_tx(struct atm_dev *dev)
1184 {
1185         struct eni_tx *tx;
1186         struct sk_buff *skb;
1187         enum enq_res res;
1188         int i;
1189
1190         DPRINTK(">poll_tx\n");
1191         for (i = NR_CHAN-1; i >= 0; i--) {
1192                 tx = &ENI_DEV(dev)->tx[i];
1193                 if (tx->send)
1194                         while ((skb = skb_dequeue(&tx->backlog))) {
1195                                 res = do_tx(skb);
1196                                 if (res == enq_ok) continue;
1197                                 DPRINTK("re-queuing TX PDU\n");
1198                                 skb_queue_head(&tx->backlog,skb);
1199                                 requeued++;
1200                                 if (res == enq_jam) return;
1201                                 break;
1202                         }
1203         }
1204 }
1205
1206
1207 static void dequeue_tx(struct atm_dev *dev)
1208 {
1209         struct eni_dev *eni_dev;
1210         struct atm_vcc *vcc;
1211         struct sk_buff *skb;
1212         struct eni_tx *tx;
1213
1214         NULLCHECK(dev);
1215         eni_dev = ENI_DEV(dev);
1216         NULLCHECK(eni_dev);
1217         while ((skb = skb_dequeue(&eni_dev->tx_queue))) {
1218                 vcc = ATM_SKB(skb)->vcc;
1219                 NULLCHECK(vcc);
1220                 tx = ENI_VCC(vcc)->tx;
1221                 NULLCHECK(ENI_VCC(vcc)->tx);
1222                 DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb),
1223                     (unsigned) eni_in(MID_TX_DESCRSTART(tx->index)));
1224                 if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) ==
1225                     eni_in(MID_TX_DESCRSTART(tx->index))) {
1226                         skb_queue_head(&eni_dev->tx_queue,skb);
1227                         break;
1228                 }
1229                 ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb);
1230                 dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len,
1231                                  DMA_TO_DEVICE);
1232                 if (vcc->pop) vcc->pop(vcc,skb);
1233                 else dev_kfree_skb_irq(skb);
1234                 atomic_inc(&vcc->stats->tx);
1235                 wake_up(&eni_dev->tx_wait);
1236                 dma_complete++;
1237         }
1238 }
1239
1240
1241 static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr)
1242 {
1243         int i;
1244
1245         for (i = !ubr; i < NR_CHAN; i++)
1246                 if (!eni_dev->tx[i].send) return eni_dev->tx+i;
1247         return NULL;
1248 }
1249
1250
1251 static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre,
1252     int *res,int unlimited)
1253 {
1254         static const int pre_div[] = { 4,16,128,2048 };
1255             /* 2^(((x+2)^2-(x+2))/2+1) */
1256
1257         if (unlimited) *pre = *res = 0;
1258         else {
1259                 if (*pcr > 0) {
1260                         int div;
1261
1262                         for (*pre = 0; *pre < 3; (*pre)++)
1263                                 if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break;
1264                         div = pre_div[*pre]**pcr;
1265                         DPRINTK("min div %d\n",div);
1266                         *res = TS_CLOCK/div-1;
1267                 }
1268                 else {
1269                         int div;
1270
1271                         if (!*pcr) *pcr = eni_dev->tx_bw+reserved;
1272                         for (*pre = 3; *pre >= 0; (*pre)--)
1273                                 if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break;
1274                         if (*pre < 3) (*pre)++; /* else fail later */
1275                         div = pre_div[*pre]*-*pcr;
1276                         DPRINTK("max div %d\n",div);
1277                         *res = DIV_ROUND_UP(TS_CLOCK, div)-1;
1278                 }
1279                 if (*res < 0) *res = 0;
1280                 if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE;
1281         }
1282         *pcr = TS_CLOCK/pre_div[*pre]/(*res+1);
1283         DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res);
1284         return 0;
1285 }
1286
1287
1288 static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp,
1289     int set_rsv,int set_shp)
1290 {
1291         struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1292         struct eni_vcc *eni_vcc = ENI_VCC(vcc);
1293         struct eni_tx *tx;
1294         unsigned long size;
1295         void __iomem *mem;
1296         int rate,ubr,unlimited,new_tx;
1297         int pre,res,order;
1298         int error;
1299
1300         rate = atm_pcr_goal(txtp);
1301         ubr = txtp->traffic_class == ATM_UBR;
1302         unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR ||
1303             rate >= ATM_OC3_PCR);
1304         if (!unlimited) {
1305                 size = txtp->max_sdu*eni_dev->tx_mult/100;
1306                 if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <=
1307                     MID_MAX_BUF_SIZE)
1308                         size = MID_MAX_BUF_SIZE;
1309         }
1310         else {
1311                 if (eni_dev->ubr) {
1312                         eni_vcc->tx = eni_dev->ubr;
1313                         txtp->pcr = ATM_OC3_PCR;
1314                         return 0;
1315                 }
1316                 size = UBR_BUFFER;
1317         }
1318         new_tx = !eni_vcc->tx;
1319         mem = NULL; /* for gcc */
1320         if (!new_tx) tx = eni_vcc->tx;
1321         else {
1322                 mem = eni_alloc_mem(eni_dev,&size);
1323                 if (!mem) return -ENOBUFS;
1324                 tx = alloc_tx(eni_dev,unlimited);
1325                 if (!tx) {
1326                         eni_free_mem(eni_dev,mem,size);
1327                         return -EBUSY;
1328                 }
1329                 DPRINTK("got chan %d\n",tx->index);
1330                 tx->reserved = tx->shaping = 0;
1331                 tx->send = mem;
1332                 tx->words = size >> 2;
1333                 skb_queue_head_init(&tx->backlog);
1334                 for (order = 0; size > (1 << (order+10)); order++);
1335                 eni_out((order << MID_SIZE_SHIFT) |
1336                     ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)),
1337                     MID_TX_PLACE(tx->index));
1338                 tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) &
1339                     MID_DESCR_START;
1340         }
1341         error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited);
1342         if (!error  && txtp->min_pcr > rate) error = -EINVAL;
1343         if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR &&
1344             txtp->max_pcr < rate) error = -EINVAL;
1345         if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved)
1346                 error = -EINVAL;
1347         if (!error && set_rsv && !set_shp && rate < tx->shaping)
1348                 error = -EINVAL;
1349         if (!error && !set_rsv && rate > tx->reserved && !ubr)
1350                 error = -EINVAL;
1351         if (error) {
1352                 if (new_tx) {
1353                         tx->send = NULL;
1354                         eni_free_mem(eni_dev,mem,size);
1355                 }
1356                 return error;
1357         }
1358         txtp->pcr = rate;
1359         if (set_rsv && !ubr) {
1360                 eni_dev->tx_bw += tx->reserved;
1361                 tx->reserved = rate;
1362                 eni_dev->tx_bw -= rate;
1363         }
1364         if (set_shp || (unlimited && new_tx)) {
1365                 if (unlimited && new_tx) eni_dev->ubr = tx;
1366                 tx->prescaler = pre;
1367                 tx->resolution = res;
1368                 tx->shaping = rate;
1369         }
1370         if (set_shp) eni_vcc->tx = tx;
1371         DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping);
1372         return 0;
1373 }
1374
1375
1376 static int open_tx_first(struct atm_vcc *vcc)
1377 {
1378         ENI_VCC(vcc)->tx = NULL;
1379         if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0;
1380         ENI_VCC(vcc)->txing = 0;
1381         return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1);
1382 }
1383
1384
1385 static int open_tx_second(struct atm_vcc *vcc)
1386 {
1387         return 0; /* nothing to do */
1388 }
1389
1390
1391 static void close_tx(struct atm_vcc *vcc)
1392 {
1393         DECLARE_WAITQUEUE(wait,current);
1394         struct eni_dev *eni_dev;
1395         struct eni_vcc *eni_vcc;
1396
1397         eni_vcc = ENI_VCC(vcc);
1398         if (!eni_vcc->tx) return;
1399         eni_dev = ENI_DEV(vcc->dev);
1400         /* wait for TX queue to drain */
1401         DPRINTK("eni_close: waiting for TX ...\n");
1402         add_wait_queue(&eni_dev->tx_wait,&wait);
1403         set_current_state(TASK_UNINTERRUPTIBLE);
1404         for (;;) {
1405                 int txing;
1406
1407                 tasklet_disable(&eni_dev->task);
1408                 txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing;
1409                 tasklet_enable(&eni_dev->task);
1410                 if (!txing) break;
1411                 DPRINTK("%d TX left\n",eni_vcc->txing);
1412                 schedule();
1413                 set_current_state(TASK_UNINTERRUPTIBLE);
1414         }
1415         set_current_state(TASK_RUNNING);
1416         remove_wait_queue(&eni_dev->tx_wait,&wait);
1417         if (eni_vcc->tx != eni_dev->ubr) {
1418                 /*
1419                  * Looping a few times in here is probably far cheaper than
1420                  * keeping track of TX completions all the time, so let's poll
1421                  * a bit ...
1422                  */
1423                 while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) !=
1424                     eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index)))
1425                         schedule();
1426                 eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2);
1427                 eni_vcc->tx->send = NULL;
1428                 eni_dev->tx_bw += eni_vcc->tx->reserved;
1429         }
1430         eni_vcc->tx = NULL;
1431 }
1432
1433
1434 static int start_tx(struct atm_dev *dev)
1435 {
1436         struct eni_dev *eni_dev;
1437         int i;
1438
1439         eni_dev = ENI_DEV(dev);
1440         eni_dev->lost = 0;
1441         eni_dev->tx_bw = ATM_OC3_PCR;
1442         eni_dev->tx_mult = DEFAULT_TX_MULT;
1443         init_waitqueue_head(&eni_dev->tx_wait);
1444         eni_dev->ubr = NULL;
1445         skb_queue_head_init(&eni_dev->tx_queue);
1446         eni_out(0,MID_DMA_WR_TX);
1447         for (i = 0; i < NR_CHAN; i++) {
1448                 eni_dev->tx[i].send = NULL;
1449                 eni_dev->tx[i].index = i;
1450         }
1451         return 0;
1452 }
1453
1454
1455 /*--------------------------------- common ----------------------------------*/
1456
1457
1458 #if 0 /* may become useful again when tuning things */
1459
1460 static void foo(void)
1461 {
1462 printk(KERN_INFO
1463   "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n"
1464   "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n",
1465   tx_complete,dma_complete,queued,requeued,submitted,backlogged,
1466   rx_enqueued,rx_dequeued,putting,pushed);
1467 if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost);
1468 }
1469
1470 #endif
1471
1472
1473 static void bug_int(struct atm_dev *dev,unsigned long reason)
1474 {
1475         DPRINTK(">bug_int\n");
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 char * const media_name[] = {
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 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 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 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         int error,i,last;
1709
1710         DPRINTK(">eni_init\n");
1711         dev->ci_range.vpi_bits = 0;
1712         dev->ci_range.vci_bits = NR_VCI_LD;
1713         dev->link_rate = ATM_OC3_PCR;
1714         eni_dev = ENI_DEV(dev);
1715         pci_dev = eni_dev->pci_dev;
1716         real_base = pci_resource_start(pci_dev, 0);
1717         eni_dev->irq = pci_dev->irq;
1718         if ((error = pci_write_config_word(pci_dev,PCI_COMMAND,
1719             PCI_COMMAND_MEMORY |
1720             (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1721                 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory "
1722                     "(0x%02x)\n",dev->number,error);
1723                 return -EIO;
1724         }
1725         printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,",
1726             dev->number,pci_dev->revision,real_base,eni_dev->irq);
1727         if (!(base = ioremap_nocache(real_base,MAP_MAX_SIZE))) {
1728                 printk("\n");
1729                 printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page "
1730                     "mapping\n",dev->number);
1731                 return -ENOMEM;
1732         }
1733         eni_dev->ioaddr = base;
1734         eni_dev->base_diff = real_base - (unsigned long) base;
1735         /* id may not be present in ASIC Tonga boards - check this @@@ */
1736         if (!eni_dev->asic) {
1737                 eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom));
1738                 if (readl(&eprom->magic) != ENI155_MAGIC) {
1739                         printk("\n");
1740                         printk(KERN_ERR DEV_LABEL
1741                                "(itf %d): bad magic - expected 0x%x, got 0x%x\n",
1742                                dev->number, ENI155_MAGIC,
1743                                (unsigned)readl(&eprom->magic));
1744                         error = -EINVAL;
1745                         goto unmap;
1746                 }
1747         }
1748         eni_dev->phy = base+PHY_BASE;
1749         eni_dev->reg = base+REG_BASE;
1750         eni_dev->ram = base+RAM_BASE;
1751         last = MAP_MAX_SIZE-RAM_BASE;
1752         for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) {
1753                 writel(0x55555555,eni_dev->ram+i);
1754                 if (readl(eni_dev->ram+i) != 0x55555555) last = i;
1755                 else {
1756                         writel(0xAAAAAAAA,eni_dev->ram+i);
1757                         if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i;
1758                         else writel(i,eni_dev->ram+i);
1759                 }
1760         }
1761         for (i = 0; i < last; i += RAM_INCREMENT)
1762                 if (readl(eni_dev->ram+i) != i) break;
1763         eni_dev->mem = i;
1764         memset_io(eni_dev->ram,0,eni_dev->mem);
1765         /* TODO: should shrink allocation now */
1766         printk("mem=%dkB (",eni_dev->mem >> 10);
1767         /* TODO: check for non-SUNI, check for TAXI ? */
1768         if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) {
1769                 printk(")\n");
1770                 printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n",
1771                     dev->number,(unsigned) eni_in(MID_RES_ID_MCON));
1772                 error = -EINVAL;
1773                 goto unmap;
1774         }
1775         error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base);
1776         if (error)
1777                 goto unmap;
1778         for (i = 0; i < ESI_LEN; i++)
1779                 printk("%s%02X",i ? "-" : "",dev->esi[i]);
1780         printk(")\n");
1781         printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number,
1782             eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA",
1783             media_name[eni_in(MID_RES_ID_MCON) & DAUGHTER_ID]);
1784
1785         error = suni_init(dev);
1786         if (error)
1787                 goto unmap;
1788 out:
1789         return error;
1790 unmap:
1791         iounmap(base);
1792         goto out;
1793 }
1794
1795 static void eni_do_release(struct atm_dev *dev)
1796 {
1797         struct eni_dev *ed = ENI_DEV(dev);
1798
1799         dev->phy->stop(dev);
1800         dev->phy = NULL;
1801         iounmap(ed->ioaddr);
1802 }
1803
1804 static int eni_start(struct atm_dev *dev)
1805 {
1806         struct eni_dev *eni_dev;
1807
1808         void __iomem *buf;
1809         unsigned long buffer_mem;
1810         int error;
1811
1812         DPRINTK(">eni_start\n");
1813         eni_dev = ENI_DEV(dev);
1814         if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) {
1815                 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
1816                     dev->number,eni_dev->irq);
1817                 error = -EAGAIN;
1818                 goto out;
1819         }
1820         pci_set_master(eni_dev->pci_dev);
1821         if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND,
1822             PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
1823             (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1824                 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+"
1825                     "master (0x%02x)\n",dev->number,error);
1826                 goto free_irq;
1827         }
1828         if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,
1829             END_SWAP_DMA))) {
1830                 printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap "
1831                     "(0x%02x)\n",dev->number,error);
1832                 goto free_irq;
1833         }
1834         /* determine addresses of internal tables */
1835         eni_dev->vci = eni_dev->ram;
1836         eni_dev->rx_dma = eni_dev->ram+NR_VCI*16;
1837         eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8;
1838         eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8;
1839         buf = eni_dev->service+NR_SERVICE*4;
1840         DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n",
1841              eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma,
1842              eni_dev->service,buf);
1843         spin_lock_init(&eni_dev->lock);
1844         tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev);
1845         eni_dev->events = 0;
1846         /* initialize memory management */
1847         buffer_mem = eni_dev->mem - (buf - eni_dev->ram);
1848         eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2;
1849         eni_dev->free_list = kmalloc_array(eni_dev->free_list_size + 1,
1850                                            sizeof(*eni_dev->free_list),
1851                                            GFP_KERNEL);
1852         if (!eni_dev->free_list) {
1853                 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
1854                     dev->number);
1855                 error = -ENOMEM;
1856                 goto free_irq;
1857         }
1858         eni_dev->free_len = 0;
1859         eni_put_free(eni_dev,buf,buffer_mem);
1860         memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */
1861         /*
1862          * byte_addr  free (k)
1863          * 0x00000000     512  VCI table
1864          * 0x00004000     496  RX DMA
1865          * 0x00005000     492  TX DMA
1866          * 0x00006000     488  service list
1867          * 0x00007000     484  buffers
1868          * 0x00080000       0  end (512kB)
1869          */
1870         eni_out(0xffffffff,MID_IE);
1871         error = start_tx(dev);
1872         if (error) goto free_list;
1873         error = start_rx(dev);
1874         if (error) goto free_list;
1875         error = dev->phy->start(dev);
1876         if (error) goto free_list;
1877         eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) |
1878             MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE,
1879             MID_MC_S);
1880             /* Tonga uses SBus INTReq1 */
1881         (void) eni_in(MID_ISA); /* clear Midway interrupts */
1882         return 0;
1883
1884 free_list:
1885         kfree(eni_dev->free_list);
1886
1887 free_irq:
1888         free_irq(eni_dev->irq, dev);
1889
1890 out:
1891         return error;
1892 }
1893
1894
1895 static void eni_close(struct atm_vcc *vcc)
1896 {
1897         DPRINTK(">eni_close\n");
1898         if (!ENI_VCC(vcc)) return;
1899         clear_bit(ATM_VF_READY,&vcc->flags);
1900         close_rx(vcc);
1901         close_tx(vcc);
1902         DPRINTK("eni_close: done waiting\n");
1903         /* deallocate memory */
1904         kfree(ENI_VCC(vcc));
1905         vcc->dev_data = NULL;
1906         clear_bit(ATM_VF_ADDR,&vcc->flags);
1907         /*foo();*/
1908 }
1909
1910
1911 static int eni_open(struct atm_vcc *vcc)
1912 {
1913         struct eni_vcc *eni_vcc;
1914         int error;
1915         short vpi = vcc->vpi;
1916         int vci = vcc->vci;
1917
1918         DPRINTK(">eni_open\n");
1919         EVENT("eni_open\n",0,0);
1920         if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1921                 vcc->dev_data = NULL;
1922         if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
1923                 set_bit(ATM_VF_ADDR,&vcc->flags);
1924         if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5)
1925                 return -EINVAL;
1926         DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi,
1927             vcc->vci);
1928         if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
1929                 eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL);
1930                 if (!eni_vcc) return -ENOMEM;
1931                 vcc->dev_data = eni_vcc;
1932                 eni_vcc->tx = NULL; /* for eni_close after open_rx */
1933                 if ((error = open_rx_first(vcc))) {
1934                         eni_close(vcc);
1935                         return error;
1936                 }
1937                 if ((error = open_tx_first(vcc))) {
1938                         eni_close(vcc);
1939                         return error;
1940                 }
1941         }
1942         if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0;
1943         if ((error = open_rx_second(vcc))) {
1944                 eni_close(vcc);
1945                 return error;
1946         }
1947         if ((error = open_tx_second(vcc))) {
1948                 eni_close(vcc);
1949                 return error;
1950         }
1951         set_bit(ATM_VF_READY,&vcc->flags);
1952         /* should power down SUNI while !ref_count @@@ */
1953         return 0;
1954 }
1955
1956
1957 static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs)
1958 {
1959         struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1960         struct eni_tx *tx = ENI_VCC(vcc)->tx;
1961         struct sk_buff *skb;
1962         int error,rate,rsv,shp;
1963
1964         if (qos->txtp.traffic_class == ATM_NONE) return 0;
1965         if (tx == eni_dev->ubr) return -EBADFD;
1966         rate = atm_pcr_goal(&qos->txtp);
1967         if (rate < 0) rate = -rate;
1968         rsv = shp = 0;
1969         if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1;
1970         if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1;
1971         if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1;
1972         if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1;
1973         if (!rsv && !shp) return 0;
1974         error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp);
1975         if (error) return error;
1976         if (shp && !(flgs & ATM_MF_IMMED)) return 0;
1977         /*
1978          * Walk through the send buffer and patch the rate information in all
1979          * segmentation buffer descriptors of this VCC.
1980          */
1981         tasklet_disable(&eni_dev->task);
1982         skb_queue_walk(&eni_dev->tx_queue, skb) {
1983                 void __iomem *dsc;
1984
1985                 if (ATM_SKB(skb)->vcc != vcc) continue;
1986                 dsc = tx->send+ENI_PRV_POS(skb)*4;
1987                 writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) |
1988                     (tx->prescaler << MID_SEG_PR_SHIFT) |
1989                     (tx->resolution << MID_SEG_RATE_SHIFT), dsc);
1990         }
1991         tasklet_enable(&eni_dev->task);
1992         return 0;
1993 }
1994
1995
1996 static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
1997 {
1998         struct eni_dev *eni_dev = ENI_DEV(dev);
1999
2000         if (cmd == ENI_MEMDUMP) {
2001                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
2002                 printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d "
2003                     "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number);
2004                 dump(dev);
2005                 return 0;
2006         }
2007         if (cmd == ENI_SETMULT) {
2008                 struct eni_multipliers mult;
2009
2010                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
2011                 if (copy_from_user(&mult, arg,
2012                     sizeof(struct eni_multipliers)))
2013                         return -EFAULT;
2014                 if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) ||
2015                     mult.tx > 65536 || mult.rx > 65536)
2016                         return -EINVAL;
2017                 if (mult.tx) eni_dev->tx_mult = mult.tx;
2018                 if (mult.rx) eni_dev->rx_mult = mult.rx;
2019                 return 0;
2020         }
2021         if (cmd == ATM_SETCIRANGE) {
2022                 struct atm_cirange ci;
2023
2024                 if (copy_from_user(&ci, arg,sizeof(struct atm_cirange)))
2025                         return -EFAULT;
2026                 if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) &&
2027                     (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX))
2028                     return 0;
2029                 return -EINVAL;
2030         }
2031         if (!dev->phy->ioctl) return -ENOIOCTLCMD;
2032         return dev->phy->ioctl(dev,cmd,arg);
2033 }
2034
2035
2036 static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname,
2037     void __user *optval,int optlen)
2038 {
2039         return -EINVAL;
2040 }
2041
2042
2043 static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname,
2044     void __user *optval,unsigned int optlen)
2045 {
2046         return -EINVAL;
2047 }
2048
2049
2050 static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb)
2051 {
2052         enum enq_res res;
2053
2054         DPRINTK(">eni_send\n");
2055         if (!ENI_VCC(vcc)->tx) {
2056                 if (vcc->pop) vcc->pop(vcc,skb);
2057                 else dev_kfree_skb(skb);
2058                 return -EINVAL;
2059         }
2060         if (!skb) {
2061                 printk(KERN_CRIT "!skb in eni_send ?\n");
2062                 if (vcc->pop) vcc->pop(vcc,skb);
2063                 return -EINVAL;
2064         }
2065         if (vcc->qos.aal == ATM_AAL0) {
2066                 if (skb->len != ATM_CELL_SIZE-1) {
2067                         if (vcc->pop) vcc->pop(vcc,skb);
2068                         else dev_kfree_skb(skb);
2069                         return -EINVAL;
2070                 }
2071                 *(u32 *) skb->data = htonl(*(u32 *) skb->data);
2072         }
2073         submitted++;
2074         ATM_SKB(skb)->vcc = vcc;
2075         tasklet_disable(&ENI_DEV(vcc->dev)->task);
2076         res = do_tx(skb);
2077         tasklet_enable(&ENI_DEV(vcc->dev)->task);
2078         if (res == enq_ok) return 0;
2079         skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb);
2080         backlogged++;
2081         tasklet_schedule(&ENI_DEV(vcc->dev)->task);
2082         return 0;
2083 }
2084
2085 static void eni_phy_put(struct atm_dev *dev,unsigned char value,
2086     unsigned long addr)
2087 {
2088         writel(value,ENI_DEV(dev)->phy+addr*4);
2089 }
2090
2091
2092
2093 static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr)
2094 {
2095         return readl(ENI_DEV(dev)->phy+addr*4);
2096 }
2097
2098
2099 static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page)
2100 {
2101         struct sock *s;
2102         static const char *signal[] = { "LOST","unknown","okay" };
2103         struct eni_dev *eni_dev = ENI_DEV(dev);
2104         struct atm_vcc *vcc;
2105         int left,i;
2106
2107         left = *pos;
2108         if (!left)
2109                 return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, "
2110                     "%d cps remaining\n",dev->number,signal[(int) dev->signal],
2111                     eni_dev->mem >> 10,eni_dev->tx_bw);
2112         if (!--left)
2113                 return sprintf(page,"%4sBursts: TX"
2114 #if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \
2115     !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \
2116     !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \
2117     !defined(CONFIG_ATM_ENI_BURST_TX_2W)
2118                     " none"
2119 #endif
2120 #ifdef CONFIG_ATM_ENI_BURST_TX_16W
2121                     " 16W"
2122 #endif
2123 #ifdef CONFIG_ATM_ENI_BURST_TX_8W
2124                     " 8W"
2125 #endif
2126 #ifdef CONFIG_ATM_ENI_BURST_TX_4W
2127                     " 4W"
2128 #endif
2129 #ifdef CONFIG_ATM_ENI_BURST_TX_2W
2130                     " 2W"
2131 #endif
2132                     ", RX"
2133 #if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \
2134     !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \
2135     !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \
2136     !defined(CONFIG_ATM_ENI_BURST_RX_2W)
2137                     " none"
2138 #endif
2139 #ifdef CONFIG_ATM_ENI_BURST_RX_16W
2140                     " 16W"
2141 #endif
2142 #ifdef CONFIG_ATM_ENI_BURST_RX_8W
2143                     " 8W"
2144 #endif
2145 #ifdef CONFIG_ATM_ENI_BURST_RX_4W
2146                     " 4W"
2147 #endif
2148 #ifdef CONFIG_ATM_ENI_BURST_RX_2W
2149                     " 2W"
2150 #endif
2151 #ifndef CONFIG_ATM_ENI_TUNE_BURST
2152                     " (default)"
2153 #endif
2154                     "\n","");
2155         if (!--left)
2156                 return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n",
2157                     "",eni_dev->tx_mult,eni_dev->rx_mult);
2158         for (i = 0; i < NR_CHAN; i++) {
2159                 struct eni_tx *tx = eni_dev->tx+i;
2160
2161                 if (!tx->send) continue;
2162                 if (!--left) {
2163                         return sprintf(page, "tx[%d]:    0x%lx-0x%lx "
2164                             "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i,
2165                             (unsigned long) (tx->send - eni_dev->ram),
2166                             tx->send-eni_dev->ram+tx->words*4-1,tx->words*4,
2167                             tx->reserved,tx->shaping,
2168                             tx == eni_dev->ubr ? " (UBR)" : "");
2169                 }
2170                 if (--left) continue;
2171                 return sprintf(page,"%10sbacklog %u packets\n","",
2172                     skb_queue_len(&tx->backlog));
2173         }
2174         read_lock(&vcc_sklist_lock);
2175         for(i = 0; i < VCC_HTABLE_SIZE; ++i) {
2176                 struct hlist_head *head = &vcc_hash[i];
2177
2178                 sk_for_each(s, head) {
2179                         struct eni_vcc *eni_vcc;
2180                         int length;
2181
2182                         vcc = atm_sk(s);
2183                         if (vcc->dev != dev)
2184                                 continue;
2185                         eni_vcc = ENI_VCC(vcc);
2186                         if (--left) continue;
2187                         length = sprintf(page,"vcc %4d: ",vcc->vci);
2188                         if (eni_vcc->rx) {
2189                                 length += sprintf(page+length, "0x%lx-0x%lx "
2190                                     "(%6ld bytes)",
2191                                     (unsigned long) (eni_vcc->recv - eni_dev->ram),
2192                                     eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1,
2193                                     eni_vcc->words*4);
2194                                 if (eni_vcc->tx) length += sprintf(page+length,", ");
2195                         }
2196                         if (eni_vcc->tx)
2197                                 length += sprintf(page+length,"tx[%d], txing %d bytes",
2198                                     eni_vcc->tx->index,eni_vcc->txing);
2199                         page[length] = '\n';
2200                         read_unlock(&vcc_sklist_lock);
2201                         return length+1;
2202                 }
2203         }
2204         read_unlock(&vcc_sklist_lock);
2205         for (i = 0; i < eni_dev->free_len; i++) {
2206                 struct eni_free *fe = eni_dev->free_list+i;
2207                 unsigned long offset;
2208
2209                 if (--left) continue;
2210                 offset = (unsigned long) eni_dev->ram+eni_dev->base_diff;
2211                 return sprintf(page,"free      %p-%p (%6d bytes)\n",
2212                     fe->start-offset,fe->start-offset+(1 << fe->order)-1,
2213                     1 << fe->order);
2214         }
2215         return 0;
2216 }
2217
2218
2219 static const struct atmdev_ops ops = {
2220         .open           = eni_open,
2221         .close          = eni_close,
2222         .ioctl          = eni_ioctl,
2223         .getsockopt     = eni_getsockopt,
2224         .setsockopt     = eni_setsockopt,
2225         .send           = eni_send,
2226         .phy_put        = eni_phy_put,
2227         .phy_get        = eni_phy_get,
2228         .change_qos     = eni_change_qos,
2229         .proc_read      = eni_proc_read
2230 };
2231
2232
2233 static int eni_init_one(struct pci_dev *pci_dev,
2234                         const struct pci_device_id *ent)
2235 {
2236         struct atm_dev *dev;
2237         struct eni_dev *eni_dev;
2238         struct eni_zero *zero;
2239         int rc;
2240
2241         rc = pci_enable_device(pci_dev);
2242         if (rc < 0)
2243                 goto out;
2244
2245         rc = dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(32));
2246         if (rc < 0)
2247                 goto out;
2248
2249         rc = -ENOMEM;
2250         eni_dev = kmalloc(sizeof(struct eni_dev), GFP_KERNEL);
2251         if (!eni_dev)
2252                 goto err_disable;
2253
2254         zero = &eni_dev->zero;
2255         zero->addr = dma_alloc_coherent(&pci_dev->dev,
2256                                         ENI_ZEROES_SIZE, &zero->dma, GFP_KERNEL);
2257         if (!zero->addr)
2258                 goto err_kfree;
2259
2260         dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL);
2261         if (!dev)
2262                 goto err_free_consistent;
2263
2264         dev->dev_data = eni_dev;
2265         pci_set_drvdata(pci_dev, dev);
2266         eni_dev->pci_dev = pci_dev;
2267         eni_dev->asic = ent->driver_data;
2268
2269         rc = eni_do_init(dev);
2270         if (rc < 0)
2271                 goto err_unregister;
2272
2273         rc = eni_start(dev);
2274         if (rc < 0)
2275                 goto err_eni_release;
2276
2277         eni_dev->more = eni_boards;
2278         eni_boards = dev;
2279 out:
2280         return rc;
2281
2282 err_eni_release:
2283         eni_do_release(dev);
2284 err_unregister:
2285         atm_dev_deregister(dev);
2286 err_free_consistent:
2287         dma_free_coherent(&pci_dev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2288 err_kfree:
2289         kfree(eni_dev);
2290 err_disable:
2291         pci_disable_device(pci_dev);
2292         goto out;
2293 }
2294
2295
2296 static const struct pci_device_id eni_pci_tbl[] = {
2297         { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_FPGA), 0 /* FPGA */ },
2298         { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_ASIC), 1 /* ASIC */ },
2299         { 0, }
2300 };
2301 MODULE_DEVICE_TABLE(pci,eni_pci_tbl);
2302
2303
2304 static void eni_remove_one(struct pci_dev *pdev)
2305 {
2306         struct atm_dev *dev = pci_get_drvdata(pdev);
2307         struct eni_dev *ed = ENI_DEV(dev);
2308         struct eni_zero *zero = &ed->zero;
2309
2310         eni_do_release(dev);
2311         atm_dev_deregister(dev);
2312         dma_free_coherent(&pdev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2313         kfree(ed);
2314         pci_disable_device(pdev);
2315 }
2316
2317
2318 static struct pci_driver eni_driver = {
2319         .name           = DEV_LABEL,
2320         .id_table       = eni_pci_tbl,
2321         .probe          = eni_init_one,
2322         .remove         = eni_remove_one,
2323 };
2324
2325
2326 static int __init eni_init(void)
2327 {
2328         struct sk_buff *skb; /* dummy for sizeof */
2329
2330         BUILD_BUG_ON(sizeof(skb->cb) < sizeof(struct eni_skb_prv));
2331         return pci_register_driver(&eni_driver);
2332 }
2333
2334
2335 module_init(eni_init);
2336 /* @@@ since exit routine not defined, this module can not be unloaded */
2337
2338 MODULE_LICENSE("GPL");