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 <asm/uaccess.h>
  25 #include <asm/string.h>
  26 #include <asm/byteorder.h>
  27
  28 #include "tonga.h"
  29 #include "midway.h"
  30 #include "suni.h"
  31 #include "eni.h"
  32
  33 #if !defined(__i386__) && !defined(__x86_64__)
  34 #ifndef ioremap_nocache
  35 #define ioremap_nocache(X,Y) ioremap(X,Y)
  36 #endif
  37 #endif
  38
  39 /*
  40  * TODO:
  41  *
  42  * Show stoppers
  43  *  none
  44  *
  45  * Minor
  46  *  - OAM support
  47  *  - fix bugs listed below
  48  */
  49
  50 /*
  51  * KNOWN BUGS:
  52  *
  53  * - may run into JK-JK bug and deadlock
  54  * - should allocate UBR channel first
  55  * - buffer space allocation algorithm is stupid
  56  *   (RX: should be maxSDU+maxdelay*rate
  57  *    TX: should be maxSDU+min(maxSDU,maxdelay*rate) )
  58  * - doesn't support OAM cells
  59  * - eni_put_free may hang if not putting memory fragments that _complete_
  60  *   2^n block (never happens in real life, though)
  61  */
  62
  63
  64 #if 0
  65 #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
  66 #else
  67 #define DPRINTK(format,args...)
  68 #endif
  69
  70
  71 #ifndef CONFIG_ATM_ENI_TUNE_BURST
  72 #define CONFIG_ATM_ENI_BURST_TX_8W
  73 #define CONFIG_ATM_ENI_BURST_RX_4W
  74 #endif
  75
  76
  77 #ifndef CONFIG_ATM_ENI_DEBUG
  78
  79
  80 #define NULLCHECK(x)
  81
  82 #define EVENT(s,a,b)
  83
  84
  85 static void event_dump(void)
  86 {
  87 }
  88
  89
  90 #else
  91
  92
  93 /*
  94  * NULL pointer checking
  95  */
  96
  97 #define NULLCHECK(x) \
  98         if ((unsigned long) (x) < 0x30) \
  99                 printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x))
 100
 101 /*
 102  * Very extensive activity logging. Greatly improves bug detection speed but
 103  * costs a few Mbps if enabled.
 104  */
 105
 106 #define EV 64
 107
 108 static const char *ev[EV];
 109 static unsigned long ev_a[EV],ev_b[EV];
 110 static int ec = 0;
 111
 112
 113 static void EVENT(const char *s,unsigned long a,unsigned long b)
 114 {
 115         ev[ec] = s;
 116         ev_a[ec] = a;
 117         ev_b[ec] = b;
 118         ec = (ec+1) % EV;
 119 }
 120
 121
 122 static void event_dump(void)
 123 {
 124         int n,i;
 125
 126         for (n = 0; n < EV; n++) {
 127                 i = (ec+n) % EV;
 128                 printk(KERN_NOTICE);
 129                 printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]);
 130         }
 131 }
 132
 133
 134 #endif /* CONFIG_ATM_ENI_DEBUG */
 135
 136
 137 /*
 138  * NExx   must not be equal at end
 139  * EExx   may be equal at end
 140  * xxPJOK verify validity of pointer jumps
 141  * xxPMOK operating on a circular buffer of "c" words
 142  */
 143
 144 #define NEPJOK(a0,a1,b) \
 145     ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1))
 146 #define EEPJOK(a0,a1,b) \
 147     ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1))
 148 #define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b)
 149 #define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b)
 150
 151
 152 static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0,
 153   backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0,
 154   putting = 0;
 155
 156 static struct atm_dev *eni_boards = NULL;
 157
 158 /* 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         DPRINTK("trying: %ld->%d\n",*size,order);
 246         best_order = 65; /* we don't have more than 2^64 of anything ... */
 247         index = 0; /* silence GCC */
 248         for (i = 0; i < len; i++)
 249                 if (list[i].order == order) {
 250                         best_order = order;
 251                         index = i;
 252                         break;
 253                 }
 254                 else if (best_order > list[i].order && list[i].order > order) {
 255                                 best_order = list[i].order;
 256                                 index = i;
 257                         }
 258         if (best_order == 65) return NULL;
 259         start = list[index].start-eni_dev->base_diff;
 260         list[index] = list[--len];
 261         eni_dev->free_len = len;
 262         *size = 1 << order;
 263         eni_put_free(eni_dev,start+*size,(1 << best_order)-*size);
 264         DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start);
 265         memset_io(start,0,*size);       /* never leak data */
 266         /*dump_mem(eni_dev);*/
 267         return start;
 268 }
 269
 270
 271 static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start,
 272     unsigned long size)
 273 {
 274         struct eni_free *list;
 275         int len,i,order;
 276
 277         start += eni_dev->base_diff;
 278         list = eni_dev->free_list;
 279         len = eni_dev->free_len;
 280         for (order = -1; size; order++) size >>= 1;
 281         DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order);
 282         for (i = 0; i < len; i++)
 283                 if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) &&
 284                     list[i].order == order) {
 285                         DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i,
 286                             list[i].start,start,1 << order,list[i].order,order);
 287                         list[i] = list[--len];
 288                         start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order));
 289                         order++;
 290                         i = -1;
 291                         continue;
 292                 }
 293         if (len >= eni_dev->free_list_size) {
 294                 printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start,
 295                     order);
 296                 return;
 297         }
 298         list[len].start = start;
 299         list[len].order = order;
 300         eni_dev->free_len = len+1;
 301         /*dump_mem(eni_dev);*/
 302 }
 303
 304
 305 /*----------------------------------- RX ------------------------------------*/
 306
 307
 308 #define ENI_VCC_NOS ((struct atm_vcc *) 1)
 309
 310
 311 static void rx_ident_err(struct atm_vcc *vcc)
 312 {
 313         struct atm_dev *dev;
 314         struct eni_dev *eni_dev;
 315         struct eni_vcc *eni_vcc;
 316
 317         dev = vcc->dev;
 318         eni_dev = ENI_DEV(dev);
 319         /* immediately halt adapter */
 320         eni_out(eni_in(MID_MC_S) &
 321             ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S);
 322         /* dump useful information */
 323         eni_vcc = ENI_VCC(vcc);
 324         printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident "
 325             "mismatch\n",dev->number);
 326         printk(KERN_ALERT "  VCI %d, rxing %d, words %ld\n",vcc->vci,
 327             eni_vcc->rxing,eni_vcc->words);
 328         printk(KERN_ALERT "  host descr 0x%lx, rx pos 0x%lx, descr value "
 329             "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos,
 330             (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4));
 331         printk(KERN_ALERT "  last %p, servicing %d\n",eni_vcc->last,
 332             eni_vcc->servicing);
 333         EVENT("---dump ends here---\n",0,0);
 334         printk(KERN_NOTICE "---recent events---\n");
 335         event_dump();
 336         ENI_DEV(dev)->fast = NULL; /* really stop it */
 337         ENI_DEV(dev)->slow = NULL;
 338         skb_queue_head_init(&ENI_DEV(dev)->rx_queue);
 339 }
 340
 341
 342 static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb,
 343     unsigned long skip,unsigned long size,unsigned long eff)
 344 {
 345         struct eni_dev *eni_dev;
 346         struct eni_vcc *eni_vcc;
 347         u32 dma_rd,dma_wr;
 348         u32 dma[RX_DMA_BUF*2];
 349         dma_addr_t paddr;
 350         unsigned long here;
 351         int i,j;
 352
 353         eni_dev = ENI_DEV(vcc->dev);
 354         eni_vcc = ENI_VCC(vcc);
 355         paddr = 0; /* GCC, shut up */
 356         if (skb) {
 357                 paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len,
 358                                        DMA_FROM_DEVICE);
 359                 if (dma_mapping_error(&eni_dev->pci_dev->dev, paddr))
 360                         goto dma_map_error;
 361                 ENI_PRV_PADDR(skb) = paddr;
 362                 if (paddr & 3)
 363                         printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has "
 364                             "mis-aligned RX data (0x%lx)\n",vcc->dev->number,
 365                             vcc->vci,(unsigned long) paddr);
 366                 ENI_PRV_SIZE(skb) = size+skip;
 367                     /* PDU plus descriptor */
 368                 ATM_SKB(skb)->vcc = vcc;
 369         }
 370         j = 0;
 371         if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */
 372                 here = (eni_vcc->descr+skip) & (eni_vcc->words-1);
 373                 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci
 374                     << MID_DMA_VCI_SHIFT) | MID_DT_JK;
 375                 dma[j++] = 0;
 376         }
 377         here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1);
 378         if (!eff) size += skip;
 379         else {
 380                 unsigned long words;
 381
 382                 if (!size) {
 383                         DPRINTK("strange things happen ...\n");
 384                         EVENT("strange things happen ... (skip=%ld,eff=%ld)\n",
 385                             size,eff);
 386                 }
 387                 words = eff;
 388                 if (paddr & 15) {
 389                         unsigned long init;
 390
 391                         init = 4-((paddr & 15) >> 2);
 392                         if (init > words) init = words;
 393                         dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
 394                             (vcc->vci << MID_DMA_VCI_SHIFT);
 395                         dma[j++] = paddr;
 396                         paddr += init << 2;
 397                         words -= init;
 398                 }
 399 #ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */
 400                 if (words & ~15) {
 401                         dma[j++] = MID_DT_16W | ((words >> 4) <<
 402                             MID_DMA_COUNT_SHIFT) | (vcc->vci <<
 403                             MID_DMA_VCI_SHIFT);
 404                         dma[j++] = paddr;
 405                         paddr += (words & ~15) << 2;
 406                         words &= 15;
 407                 }
 408 #endif
 409 #ifdef CONFIG_ATM_ENI_BURST_RX_8W  /* works only with *some* PCI chipsets ... */
 410                 if (words & ~7) {
 411                         dma[j++] = MID_DT_8W | ((words >> 3) <<
 412                             MID_DMA_COUNT_SHIFT) | (vcc->vci <<
 413                             MID_DMA_VCI_SHIFT);
 414                         dma[j++] = paddr;
 415                         paddr += (words & ~7) << 2;
 416                         words &= 7;
 417                 }
 418 #endif
 419 #ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */
 420                 if (words & ~3) {
 421                         dma[j++] = MID_DT_4W | ((words >> 2) <<
 422                             MID_DMA_COUNT_SHIFT) | (vcc->vci <<
 423                             MID_DMA_VCI_SHIFT);
 424                         dma[j++] = paddr;
 425                         paddr += (words & ~3) << 2;
 426                         words &= 3;
 427                 }
 428 #endif
 429 #ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */
 430                 if (words & ~1) {
 431                         dma[j++] = MID_DT_2W | ((words >> 1) <<
 432                             MID_DMA_COUNT_SHIFT) | (vcc->vci <<
 433                             MID_DMA_VCI_SHIFT);
 434                         dma[j++] = paddr;
 435                         paddr += (words & ~1) << 2;
 436                         words &= 1;
 437                 }
 438 #endif
 439                 if (words) {
 440                         dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT)
 441                             | (vcc->vci << MID_DMA_VCI_SHIFT);
 442                         dma[j++] = paddr;
 443                 }
 444         }
 445         if (size != eff) {
 446                 dma[j++] = (here << MID_DMA_COUNT_SHIFT) |
 447                     (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK;
 448                 dma[j++] = 0;
 449         }
 450         if (!j || j > 2*RX_DMA_BUF) {
 451                 printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n");
 452                 goto trouble;
 453         }
 454         dma[j-2] |= MID_DMA_END;
 455         j = j >> 1;
 456         dma_wr = eni_in(MID_DMA_WR_RX);
 457         dma_rd = eni_in(MID_DMA_RD_RX);
 458         /*
 459          * Can I move the dma_wr pointer by 2j+1 positions without overwriting
 460          * data that hasn't been read (position of dma_rd) yet ?
 461          */
 462         if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */
 463                 printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n",
 464                     vcc->dev->number);
 465                 goto trouble;
 466         }
 467         for (i = 0; i < j; i++) {
 468                 writel(dma[i*2],eni_dev->rx_dma+dma_wr*8);
 469                 writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4);
 470                 dma_wr = (dma_wr+1) & (NR_DMA_RX-1);
 471         }
 472         if (skb) {
 473                 ENI_PRV_POS(skb) = eni_vcc->descr+size+1;
 474                 skb_queue_tail(&eni_dev->rx_queue,skb);
 475                 eni_vcc->last = skb;
 476 rx_enqueued++;
 477         }
 478         eni_vcc->descr = here;
 479         eni_out(dma_wr,MID_DMA_WR_RX);
 480         return 0;
 481
 482 trouble:
 483         if (paddr)
 484                 dma_unmap_single(&eni_dev->pci_dev->dev,paddr,skb->len,
 485                                  DMA_FROM_DEVICE);
 486 dma_map_error:
 487         if (skb) dev_kfree_skb_irq(skb);
 488         return -1;
 489 }
 490
 491
 492 static void discard(struct atm_vcc *vcc,unsigned long size)
 493 {
 494         struct eni_vcc *eni_vcc;
 495
 496         eni_vcc = ENI_VCC(vcc);
 497         EVENT("discard (size=%ld)\n",size,0);
 498         while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0);
 499             /* could do a full fallback, but that might be more expensive */
 500         if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1;
 501         else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1);
 502 }
 503
 504
 505 /*
 506  * TODO: should check whether direct copies (without DMA setup, dequeuing on
 507  * interrupt, etc.) aren't much faster for AAL0
 508  */
 509
 510 static int rx_aal0(struct atm_vcc *vcc)
 511 {
 512         struct eni_vcc *eni_vcc;
 513         unsigned long descr;
 514         unsigned long length;
 515         struct sk_buff *skb;
 516
 517         DPRINTK(">rx_aal0\n");
 518         eni_vcc = ENI_VCC(vcc);
 519         descr = readl(eni_vcc->recv+eni_vcc->descr*4);
 520         if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
 521                 rx_ident_err(vcc);
 522                 return 1;
 523         }
 524         if (descr & MID_RED_T) {
 525                 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
 526                     vcc->dev->number);
 527                 length = 0;
 528                 atomic_inc(&vcc->stats->rx_err);
 529         }
 530         else {
 531                 length = ATM_CELL_SIZE-1; /* no HEC */
 532         }
 533         skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL;
 534         if (!skb) {
 535                 discard(vcc,length >> 2);
 536                 return 0;
 537         }
 538         skb_put(skb,length);
 539         skb->tstamp = eni_vcc->timestamp;
 540         DPRINTK("got len %ld\n",length);
 541         if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1;
 542         eni_vcc->rxing++;
 543         return 0;
 544 }
 545
 546
 547 static int rx_aal5(struct atm_vcc *vcc)
 548 {
 549         struct eni_vcc *eni_vcc;
 550         unsigned long descr;
 551         unsigned long size,eff,length;
 552         struct sk_buff *skb;
 553
 554         EVENT("rx_aal5\n",0,0);
 555         DPRINTK(">rx_aal5\n");
 556         eni_vcc = ENI_VCC(vcc);
 557         descr = readl(eni_vcc->recv+eni_vcc->descr*4);
 558         if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
 559                 rx_ident_err(vcc);
 560                 return 1;
 561         }
 562         if (descr & (MID_RED_T | MID_RED_CRC_ERR)) {
 563                 if (descr & MID_RED_T) {
 564                         EVENT("empty cell (descr=0x%lx)\n",descr,0);
 565                         DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
 566                             vcc->dev->number);
 567                         size = 0;
 568                 }
 569                 else {
 570                         static unsigned long silence = 0;
 571
 572                         if (time_after(jiffies, silence) || silence == 0) {
 573                                 printk(KERN_WARNING DEV_LABEL "(itf %d): "
 574                                     "discarding PDU(s) with CRC error\n",
 575                                     vcc->dev->number);
 576                                 silence = (jiffies+2*HZ)|1;
 577                         }
 578                         size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
 579                         EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr,
 580                             size);
 581                 }
 582                 eff = length = 0;
 583                 atomic_inc(&vcc->stats->rx_err);
 584         }
 585         else {
 586                 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
 587                 DPRINTK("size=%ld\n",size);
 588                 length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) &
 589                     (eni_vcc->words-1)))*4) & 0xffff;
 590                                 /* -trailer(2)+header(1) */
 591                 if (length && length <= (size << 2)-8 && length <=
 592                   ATM_MAX_AAL5_PDU) eff = (length+3) >> 2;
 593                 else {                           /* ^ trailer length (8) */
 594                         EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr,
 595                             length);
 596                         printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU "
 597                             "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n",
 598                             vcc->dev->number,vcc->vci,length,size << 2,descr);
 599                         length = eff = 0;
 600                         atomic_inc(&vcc->stats->rx_err);
 601                 }
 602         }
 603         skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL;
 604         if (!skb) {
 605                 discard(vcc,size);
 606                 return 0;
 607         }
 608         skb_put(skb,length);
 609         DPRINTK("got len %ld\n",length);
 610         if (do_rx_dma(vcc,skb,1,size,eff)) return 1;
 611         eni_vcc->rxing++;
 612         return 0;
 613 }
 614
 615
 616 static inline int rx_vcc(struct atm_vcc *vcc)
 617 {
 618         void __iomem *vci_dsc;
 619         unsigned long tmp;
 620         struct eni_vcc *eni_vcc;
 621
 622         eni_vcc = ENI_VCC(vcc);
 623         vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16;
 624         EVENT("rx_vcc(1)\n",0,0);
 625         while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >>
 626             MID_VCI_DESCR_SHIFT)) {
 627                 EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n",
 628                     eni_vcc->descr,tmp);
 629                 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
 630                     (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
 631                     MID_VCI_DESCR_SHIFT));
 632                 if (ENI_VCC(vcc)->rx(vcc)) return 1;
 633         }
 634         /* clear IN_SERVICE flag */
 635         writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc);
 636         /*
 637          * If new data has arrived between evaluating the while condition and
 638          * clearing IN_SERVICE, we wouldn't be notified until additional data
 639          * follows. So we have to loop again to be sure.
 640          */
 641         EVENT("rx_vcc(3)\n",0,0);
 642         while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR)
 643             >> MID_VCI_DESCR_SHIFT)) {
 644                 EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n",
 645                     eni_vcc->descr,tmp);
 646                 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
 647                     (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
 648                     MID_VCI_DESCR_SHIFT));
 649                 if (ENI_VCC(vcc)->rx(vcc)) return 1;
 650         }
 651         return 0;
 652 }
 653
 654
 655 static void poll_rx(struct atm_dev *dev)
 656 {
 657         struct eni_dev *eni_dev;
 658         struct atm_vcc *curr;
 659
 660         eni_dev = ENI_DEV(dev);
 661         while ((curr = eni_dev->fast)) {
 662                 EVENT("poll_rx.fast\n",0,0);
 663                 if (rx_vcc(curr)) return;
 664                 eni_dev->fast = ENI_VCC(curr)->next;
 665                 ENI_VCC(curr)->next = ENI_VCC_NOS;
 666                 barrier();
 667                 ENI_VCC(curr)->servicing--;
 668         }
 669         while ((curr = eni_dev->slow)) {
 670                 EVENT("poll_rx.slow\n",0,0);
 671                 if (rx_vcc(curr)) return;
 672                 eni_dev->slow = ENI_VCC(curr)->next;
 673                 ENI_VCC(curr)->next = ENI_VCC_NOS;
 674                 barrier();
 675                 ENI_VCC(curr)->servicing--;
 676         }
 677 }
 678
 679
 680 static void get_service(struct atm_dev *dev)
 681 {
 682         struct eni_dev *eni_dev;
 683         struct atm_vcc *vcc;
 684         unsigned long vci;
 685
 686         DPRINTK(">get_service\n");
 687         eni_dev = ENI_DEV(dev);
 688         while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) {
 689                 vci = readl(eni_dev->service+eni_dev->serv_read*4);
 690                 eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1);
 691                 vcc = eni_dev->rx_map[vci & 1023];
 692                 if (!vcc) {
 693                         printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not "
 694                             "found\n",dev->number,vci);
 695                         continue; /* nasty but we try to go on anyway */
 696                         /* @@@ nope, doesn't work */
 697                 }
 698                 EVENT("getting from service\n",0,0);
 699                 if (ENI_VCC(vcc)->next != ENI_VCC_NOS) {
 700                         EVENT("double service\n",0,0);
 701                         DPRINTK("Grr, servicing VCC %ld twice\n",vci);
 702                         continue;
 703                 }
 704                 ENI_VCC(vcc)->timestamp = ktime_get_real();
 705                 ENI_VCC(vcc)->next = NULL;
 706                 if (vcc->qos.rxtp.traffic_class == ATM_CBR) {
 707                         if (eni_dev->fast)
 708                                 ENI_VCC(eni_dev->last_fast)->next = vcc;
 709                         else eni_dev->fast = vcc;
 710                         eni_dev->last_fast = vcc;
 711                 }
 712                 else {
 713                         if (eni_dev->slow)
 714                                 ENI_VCC(eni_dev->last_slow)->next = vcc;
 715                         else eni_dev->slow = vcc;
 716                         eni_dev->last_slow = vcc;
 717                 }
 718 putting++;
 719                 ENI_VCC(vcc)->servicing++;
 720         }
 721 }
 722
 723
 724 static void dequeue_rx(struct atm_dev *dev)
 725 {
 726         struct eni_dev *eni_dev;
 727         struct eni_vcc *eni_vcc;
 728         struct atm_vcc *vcc;
 729         struct sk_buff *skb;
 730         void __iomem *vci_dsc;
 731         int first;
 732
 733         eni_dev = ENI_DEV(dev);
 734         first = 1;
 735         while (1) {
 736                 skb = skb_dequeue(&eni_dev->rx_queue);
 737                 if (!skb) {
 738                         if (first) {
 739                                 DPRINTK(DEV_LABEL "(itf %d): RX but not "
 740                                     "rxing\n",dev->number);
 741                                 EVENT("nothing to dequeue\n",0,0);
 742                         }
 743                         break;
 744                 }
 745                 EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb),
 746                     ENI_PRV_POS(skb));
 747 rx_dequeued++;
 748                 vcc = ATM_SKB(skb)->vcc;
 749                 eni_vcc = ENI_VCC(vcc);
 750                 first = 0;
 751                 vci_dsc = eni_dev->vci+vcc->vci*16;
 752                 if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb),
 753                     (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT,
 754                     eni_vcc->words)) {
 755                         EVENT("requeuing\n",0,0);
 756                         skb_queue_head(&eni_dev->rx_queue,skb);
 757                         break;
 758                 }
 759                 eni_vcc->rxing--;
 760                 eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1);
 761                 dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len,
 762                                  DMA_TO_DEVICE);
 763                 if (!skb->len) dev_kfree_skb_irq(skb);
 764                 else {
 765                         EVENT("pushing (len=%ld)\n",skb->len,0);
 766                         if (vcc->qos.aal == ATM_AAL0)
 767                                 *(unsigned long *) skb->data =
 768                                     ntohl(*(unsigned long *) skb->data);
 769                         memset(skb->cb,0,sizeof(struct eni_skb_prv));
 770                         vcc->push(vcc,skb);
 771                         pushed++;
 772                 }
 773                 atomic_inc(&vcc->stats->rx);
 774         }
 775         wake_up(&eni_dev->rx_wait);
 776 }
 777
 778
 779 static int open_rx_first(struct atm_vcc *vcc)
 780 {
 781         struct eni_dev *eni_dev;
 782         struct eni_vcc *eni_vcc;
 783         unsigned long size;
 784
 785         DPRINTK("open_rx_first\n");
 786         eni_dev = ENI_DEV(vcc->dev);
 787         eni_vcc = ENI_VCC(vcc);
 788         eni_vcc->rx = NULL;
 789         if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0;
 790         size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100;
 791         if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <=
 792             MID_MAX_BUF_SIZE)
 793                 size = MID_MAX_BUF_SIZE;
 794         eni_vcc->recv = eni_alloc_mem(eni_dev,&size);
 795         DPRINTK("rx at 0x%lx\n",eni_vcc->recv);
 796         eni_vcc->words = size >> 2;
 797         if (!eni_vcc->recv) return -ENOBUFS;
 798         eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0;
 799         eni_vcc->descr = 0;
 800         eni_vcc->rx_pos = 0;
 801         eni_vcc->rxing = 0;
 802         eni_vcc->servicing = 0;
 803         eni_vcc->next = ENI_VCC_NOS;
 804         return 0;
 805 }
 806
 807
 808 static int open_rx_second(struct atm_vcc *vcc)
 809 {
 810         void __iomem *here;
 811         struct eni_dev *eni_dev;
 812         struct eni_vcc *eni_vcc;
 813         unsigned long size;
 814         int order;
 815
 816         DPRINTK("open_rx_second\n");
 817         eni_dev = ENI_DEV(vcc->dev);
 818         eni_vcc = ENI_VCC(vcc);
 819         if (!eni_vcc->rx) return 0;
 820         /* set up VCI descriptor */
 821         here = eni_dev->vci+vcc->vci*16;
 822         DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4);
 823         size = eni_vcc->words >> 8;
 824         for (order = -1; size; order++) size >>= 1;
 825         writel(0,here+4); /* descr, read = 0 */
 826         writel(0,here+8); /* write, state, count = 0 */
 827         if (eni_dev->rx_map[vcc->vci])
 828                 printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already "
 829                     "in use\n",vcc->dev->number,vcc->vci);
 830         eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */
 831         writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) <<
 832             MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE |
 833             (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) <<
 834             MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here);
 835         return 0;
 836 }
 837
 838
 839 static void close_rx(struct atm_vcc *vcc)
 840 {
 841         DECLARE_WAITQUEUE(wait,current);
 842         void __iomem *here;
 843         struct eni_dev *eni_dev;
 844         struct eni_vcc *eni_vcc;
 845
 846         eni_vcc = ENI_VCC(vcc);
 847         if (!eni_vcc->rx) return;
 848         eni_dev = ENI_DEV(vcc->dev);
 849         if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) {
 850                 here = eni_dev->vci+vcc->vci*16;
 851                 /* block receiver */
 852                 writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH <<
 853                     MID_VCI_MODE_SHIFT),here);
 854                 /* wait for receiver to become idle */
 855                 udelay(27);
 856                 /* discard pending cell */
 857                 writel(readl(here) & ~MID_VCI_IN_SERVICE,here);
 858                 /* don't accept any new ones */
 859                 eni_dev->rx_map[vcc->vci] = NULL;
 860                 /* wait for RX queue to drain */
 861                 DPRINTK("eni_close: waiting for RX ...\n");
 862                 EVENT("RX closing\n",0,0);
 863                 add_wait_queue(&eni_dev->rx_wait,&wait);
 864                 set_current_state(TASK_UNINTERRUPTIBLE);
 865                 barrier();
 866                 for (;;) {
 867                         /* transition service->rx: rxing++, servicing-- */
 868                         if (!eni_vcc->servicing) {
 869                                 barrier();
 870                                 if (!eni_vcc->rxing) break;
 871                         }
 872                         EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing,
 873                             eni_vcc->servicing);
 874                         printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing,
 875                             eni_vcc->rxing);
 876                         schedule();
 877                         set_current_state(TASK_UNINTERRUPTIBLE);
 878                 }
 879                 for (;;) {
 880                         int at_end;
 881                         u32 tmp;
 882
 883                         tasklet_disable(&eni_dev->task);
 884                         tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ;
 885                         at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT;
 886                         tasklet_enable(&eni_dev->task);
 887                         if (at_end) break;
 888                         EVENT("drain discard (host 0x%lx, nic 0x%lx)\n",
 889                             eni_vcc->rx_pos,tmp);
 890                         printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n",
 891                             eni_vcc->rx_pos,tmp);
 892                         schedule();
 893                         set_current_state(TASK_UNINTERRUPTIBLE);
 894                 }
 895                 set_current_state(TASK_RUNNING);
 896                 remove_wait_queue(&eni_dev->rx_wait,&wait);
 897         }
 898         eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2);
 899         eni_vcc->rx = NULL;
 900 }
 901
 902
 903 static int start_rx(struct atm_dev *dev)
 904 {
 905         struct eni_dev *eni_dev;
 906
 907         eni_dev = ENI_DEV(dev);
 908         eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL);
 909         if (!eni_dev->rx_map) {
 910                 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
 911                     dev->number);
 912                 free_page((unsigned long) eni_dev->free_list);
 913                 return -ENOMEM;
 914         }
 915         eni_dev->rx_mult = DEFAULT_RX_MULT;
 916         eni_dev->fast = eni_dev->last_fast = NULL;
 917         eni_dev->slow = eni_dev->last_slow = NULL;
 918         init_waitqueue_head(&eni_dev->rx_wait);
 919         skb_queue_head_init(&eni_dev->rx_queue);
 920         eni_dev->serv_read = eni_in(MID_SERV_WRITE);
 921         eni_out(0,MID_DMA_WR_RX);
 922         return 0;
 923 }
 924
 925
 926 /*----------------------------------- TX ------------------------------------*/
 927
 928
 929 enum enq_res { enq_ok,enq_next,enq_jam };
 930
 931
 932 static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr,
 933     u32 size)
 934 {
 935         u32 init,words;
 936
 937         DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size);
 938         EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size);
 939 #if 0 /* don't complain anymore */
 940         if (paddr & 3)
 941                 printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr);
 942         if (size & 3)
 943                 printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size);
 944 #endif
 945         if (paddr & 3) {
 946                 init = 4-(paddr & 3);
 947                 if (init > size || size < 7) init = size;
 948                 DPRINTK("put_dma: %lx DMA: %d/%d bytes\n",
 949                     (unsigned long) paddr,init,size);
 950                 dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) |
 951                     (chan << MID_DMA_CHAN_SHIFT);
 952                 dma[(*j)++] = paddr;
 953                 paddr += init;
 954                 size -= init;
 955         }
 956         words = size >> 2;
 957         size &= 3;
 958         if (words && (paddr & 31)) {
 959                 init = 8-((paddr & 31) >> 2);
 960                 if (init > words) init = words;
 961                 DPRINTK("put_dma: %lx DMA: %d/%d words\n",
 962                     (unsigned long) paddr,init,words);
 963                 dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
 964                     (chan << MID_DMA_CHAN_SHIFT);
 965                 dma[(*j)++] = paddr;
 966                 paddr += init << 2;
 967                 words -= init;
 968         }
 969 #ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */
 970         if (words & ~15) {
 971                 DPRINTK("put_dma: %lx DMA: %d*16/%d words\n",
 972                     (unsigned long) paddr,words >> 4,words);
 973                 dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT)
 974                     | (chan << MID_DMA_CHAN_SHIFT);
 975                 dma[(*j)++] = paddr;
 976                 paddr += (words & ~15) << 2;
 977                 words &= 15;
 978         }
 979 #endif
 980 #ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */
 981         if (words & ~7) {
 982                 DPRINTK("put_dma: %lx DMA: %d*8/%d words\n",
 983                     (unsigned long) paddr,words >> 3,words);
 984                 dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT)
 985                     | (chan << MID_DMA_CHAN_SHIFT);
 986                 dma[(*j)++] = paddr;
 987                 paddr += (words & ~7) << 2;
 988                 words &= 7;
 989         }
 990 #endif
 991 #ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */
 992         if (words & ~3) {
 993                 DPRINTK("put_dma: %lx DMA: %d*4/%d words\n",
 994                     (unsigned long) paddr,words >> 2,words);
 995                 dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT)
 996                     | (chan << MID_DMA_CHAN_SHIFT);
 997                 dma[(*j)++] = paddr;
 998                 paddr += (words & ~3) << 2;
 999                 words &= 3;
1000         }
1001 #endif
1002 #ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */
1003         if (words & ~1) {
1004                 DPRINTK("put_dma: %lx DMA: %d*2/%d words\n",
1005                     (unsigned long) paddr,words >> 1,words);
1006                 dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT)
1007                     | (chan << MID_DMA_CHAN_SHIFT);
1008                 dma[(*j)++] = paddr;
1009                 paddr += (words & ~1) << 2;
1010                 words &= 1;
1011         }
1012 #endif
1013         if (words) {
1014                 DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr,
1015                     words);
1016                 dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) |
1017                     (chan << MID_DMA_CHAN_SHIFT);
1018                 dma[(*j)++] = paddr;
1019                 paddr += words << 2;
1020         }
1021         if (size) {
1022                 DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr,
1023                     size);
1024                 dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) |
1025                     (chan << MID_DMA_CHAN_SHIFT);
1026                 dma[(*j)++] = paddr;
1027         }
1028 }
1029
1030
1031 static enum enq_res do_tx(struct sk_buff *skb)
1032 {
1033         struct atm_vcc *vcc;
1034         struct eni_dev *eni_dev;
1035         struct eni_vcc *eni_vcc;
1036         struct eni_tx *tx;
1037         dma_addr_t paddr;
1038         u32 dma_rd,dma_wr;
1039         u32 size; /* in words */
1040         int aal5,dma_size,i,j;
1041
1042         DPRINTK(">do_tx\n");
1043         NULLCHECK(skb);
1044         EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len);
1045         vcc = ATM_SKB(skb)->vcc;
1046         NULLCHECK(vcc);
1047         eni_dev = ENI_DEV(vcc->dev);
1048         NULLCHECK(eni_dev);
1049         eni_vcc = ENI_VCC(vcc);
1050         tx = eni_vcc->tx;
1051         NULLCHECK(tx);
1052 #if 0 /* Enable this for testing with the "align" program */
1053         {
1054                 unsigned int hack = *((char *) skb->data)-'0';
1055
1056                 if (hack < 8) {
1057                         skb->data += hack;
1058                         skb->len -= hack;
1059                 }
1060         }
1061 #endif
1062 #if 0 /* should work now */
1063         if ((unsigned long) skb->data & 3)
1064                 printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned "
1065                     "TX data\n",vcc->dev->number,vcc->vci);
1066 #endif
1067         /*
1068          * Potential future IP speedup: make hard_header big enough to put
1069          * segmentation descriptor directly into PDU. Saves: 4 slave writes,
1070          * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-)
1071          */
1072
1073         aal5 = vcc->qos.aal == ATM_AAL5;
1074         /* check space in buffer */
1075         if (!aal5)
1076                 size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE;
1077                         /* cell without HEC plus segmentation header (includes
1078                            four-byte cell header) */
1079         else {
1080                 size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1;
1081                         /* add AAL5 trailer */
1082                 size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE;
1083                                                 /* add segmentation header */
1084         }
1085         /*
1086          * Can I move tx_pos by size bytes without getting closer than TX_GAP
1087          * to the read pointer ? TX_GAP means to leave some space for what
1088          * the manual calls "too close".
1089          */
1090         if (!NEPMOK(tx->tx_pos,size+TX_GAP,
1091             eni_in(MID_TX_RDPTR(tx->index)),tx->words)) {
1092                 DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n",
1093                     vcc->dev->number,size);
1094                 return enq_next;
1095         }
1096         /* check DMA */
1097         dma_wr = eni_in(MID_DMA_WR_TX);
1098         dma_rd = eni_in(MID_DMA_RD_TX);
1099         dma_size = 3; /* JK for descriptor and final fill, plus final size
1100                          mis-alignment fix */
1101 DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags);
1102         if (!skb_shinfo(skb)->nr_frags) dma_size += 5;
1103         else dma_size += 5*(skb_shinfo(skb)->nr_frags+1);
1104         if (dma_size > TX_DMA_BUF) {
1105                 printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries "
1106                     "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF);
1107         }
1108         DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos);
1109         if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) <
1110              dma_size) {
1111                 printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n",
1112                     vcc->dev->number);
1113                 return enq_jam;
1114         }
1115         paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len,
1116                                DMA_TO_DEVICE);
1117         if (dma_mapping_error(&eni_dev->pci_dev->dev, paddr))
1118                 return enq_next;
1119         ENI_PRV_PADDR(skb) = paddr;
1120         /* prepare DMA queue entries */
1121         j = 0;
1122         eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) <<
1123              MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1124              MID_DT_JK;
1125         j++;
1126         if (!skb_shinfo(skb)->nr_frags)
1127                 if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len);
1128                 else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4);
1129         else {
1130 DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */
1131                 for (i = -1; i < skb_shinfo(skb)->nr_frags; i++)
1132                         if (i == -1)
1133                                 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1134                                     skb->data,
1135                                     skb_headlen(skb));
1136                         else
1137                                 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1138                                     skb_frag_page(&skb_shinfo(skb)->frags[i]) +
1139                                         skb_shinfo(skb)->frags[i].page_offset,
1140                                     skb_frag_size(&skb_shinfo(skb)->frags[i]));
1141         }
1142         if (skb->len & 3) {
1143                 put_dma(tx->index, eni_dev->dma, &j, eni_dev->zero.dma,
1144                         4 - (skb->len & 3));
1145         }
1146         /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */
1147         eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) <<
1148              MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1149              MID_DMA_END | MID_DT_JK;
1150         j++;
1151         DPRINTK("DMA at end: %d\n",j);
1152         /* store frame */
1153         writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) |
1154             (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) |
1155             (tx->resolution << MID_SEG_RATE_SHIFT) |
1156             (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4);
1157 /*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/
1158         writel((vcc->vci << MID_SEG_VCI_SHIFT) |
1159             (aal5 ? 0 : (skb->data[3] & 0xf)) |
1160             (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0),
1161             tx->send+((tx->tx_pos+1) & (tx->words-1))*4);
1162         DPRINTK("size: %d, len:%d\n",size,skb->len);
1163         if (aal5)
1164                 writel(skb->len,tx->send+
1165                     ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4);
1166         j = j >> 1;
1167         for (i = 0; i < j; i++) {
1168                 writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8);
1169                 writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4);
1170                 dma_wr = (dma_wr+1) & (NR_DMA_TX-1);
1171         }
1172         ENI_PRV_POS(skb) = tx->tx_pos;
1173         ENI_PRV_SIZE(skb) = size;
1174         ENI_VCC(vcc)->txing += size;
1175         tx->tx_pos = (tx->tx_pos+size) & (tx->words-1);
1176         DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos);
1177         eni_out(dma_wr,MID_DMA_WR_TX);
1178         skb_queue_tail(&eni_dev->tx_queue,skb);
1179 queued++;
1180         return enq_ok;
1181 }
1182
1183
1184 static void poll_tx(struct atm_dev *dev)
1185 {
1186         struct eni_tx *tx;
1187         struct sk_buff *skb;
1188         enum enq_res res;
1189         int i;
1190
1191         DPRINTK(">poll_tx\n");
1192         for (i = NR_CHAN-1; i >= 0; i--) {
1193                 tx = &ENI_DEV(dev)->tx[i];
1194                 if (tx->send)
1195                         while ((skb = skb_dequeue(&tx->backlog))) {
1196                                 res = do_tx(skb);
1197                                 if (res == enq_ok) continue;
1198                                 DPRINTK("re-queuing TX PDU\n");
1199                                 skb_queue_head(&tx->backlog,skb);
1200 requeued++;
1201                                 if (res == enq_jam) return;
1202                                 break;
1203                         }
1204         }
1205 }
1206
1207
1208 static void dequeue_tx(struct atm_dev *dev)
1209 {
1210         struct eni_dev *eni_dev;
1211         struct atm_vcc *vcc;
1212         struct sk_buff *skb;
1213         struct eni_tx *tx;
1214
1215         NULLCHECK(dev);
1216         eni_dev = ENI_DEV(dev);
1217         NULLCHECK(eni_dev);
1218         while ((skb = skb_dequeue(&eni_dev->tx_queue))) {
1219                 vcc = ATM_SKB(skb)->vcc;
1220                 NULLCHECK(vcc);
1221                 tx = ENI_VCC(vcc)->tx;
1222                 NULLCHECK(ENI_VCC(vcc)->tx);
1223                 DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb),
1224                     (unsigned) eni_in(MID_TX_DESCRSTART(tx->index)));
1225                 if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) ==
1226                     eni_in(MID_TX_DESCRSTART(tx->index))) {
1227                         skb_queue_head(&eni_dev->tx_queue,skb);
1228                         break;
1229                 }
1230                 ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb);
1231                 dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len,
1232                                  DMA_TO_DEVICE);
1233                 if (vcc->pop) vcc->pop(vcc,skb);
1234                 else dev_kfree_skb_irq(skb);
1235                 atomic_inc(&vcc->stats->tx);
1236                 wake_up(&eni_dev->tx_wait);
1237 dma_complete++;
1238         }
1239 }
1240
1241
1242 static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr)
1243 {
1244         int i;
1245
1246         for (i = !ubr; i < NR_CHAN; i++)
1247                 if (!eni_dev->tx[i].send) return eni_dev->tx+i;
1248         return NULL;
1249 }
1250
1251
1252 static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre,
1253     int *res,int unlimited)
1254 {
1255         static const int pre_div[] = { 4,16,128,2048 };
1256             /* 2^(((x+2)^2-(x+2))/2+1) */
1257
1258         if (unlimited) *pre = *res = 0;
1259         else {
1260                 if (*pcr > 0) {
1261                         int div;
1262
1263                         for (*pre = 0; *pre < 3; (*pre)++)
1264                                 if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break;
1265                         div = pre_div[*pre]**pcr;
1266                         DPRINTK("min div %d\n",div);
1267                         *res = TS_CLOCK/div-1;
1268                 }
1269                 else {
1270                         int div;
1271
1272                         if (!*pcr) *pcr = eni_dev->tx_bw+reserved;
1273                         for (*pre = 3; *pre >= 0; (*pre)--)
1274                                 if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break;
1275                         if (*pre < 3) (*pre)++; /* else fail later */
1276                         div = pre_div[*pre]*-*pcr;
1277                         DPRINTK("max div %d\n",div);
1278                         *res = DIV_ROUND_UP(TS_CLOCK, div)-1;
1279                 }
1280                 if (*res < 0) *res = 0;
1281                 if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE;
1282         }
1283         *pcr = TS_CLOCK/pre_div[*pre]/(*res+1);
1284         DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res);
1285         return 0;
1286 }
1287
1288
1289 static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp,
1290     int set_rsv,int set_shp)
1291 {
1292         struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1293         struct eni_vcc *eni_vcc = ENI_VCC(vcc);
1294         struct eni_tx *tx;
1295         unsigned long size;
1296         void __iomem *mem;
1297         int rate,ubr,unlimited,new_tx;
1298         int pre,res,order;
1299         int error;
1300
1301         rate = atm_pcr_goal(txtp);
1302         ubr = txtp->traffic_class == ATM_UBR;
1303         unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR ||
1304             rate >= ATM_OC3_PCR);
1305         if (!unlimited) {
1306                 size = txtp->max_sdu*eni_dev->tx_mult/100;
1307                 if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <=
1308                     MID_MAX_BUF_SIZE)
1309                         size = MID_MAX_BUF_SIZE;
1310         }
1311         else {
1312                 if (eni_dev->ubr) {
1313                         eni_vcc->tx = eni_dev->ubr;
1314                         txtp->pcr = ATM_OC3_PCR;
1315                         return 0;
1316                 }
1317                 size = UBR_BUFFER;
1318         }
1319         new_tx = !eni_vcc->tx;
1320         mem = NULL; /* for gcc */
1321         if (!new_tx) tx = eni_vcc->tx;
1322         else {
1323                 mem = eni_alloc_mem(eni_dev,&size);
1324                 if (!mem) return -ENOBUFS;
1325                 tx = alloc_tx(eni_dev,unlimited);
1326                 if (!tx) {
1327                         eni_free_mem(eni_dev,mem,size);
1328                         return -EBUSY;
1329                 }
1330                 DPRINTK("got chan %d\n",tx->index);
1331                 tx->reserved = tx->shaping = 0;
1332                 tx->send = mem;
1333                 tx->words = size >> 2;
1334                 skb_queue_head_init(&tx->backlog);
1335                 for (order = 0; size > (1 << (order+10)); order++);
1336                 eni_out((order << MID_SIZE_SHIFT) |
1337                     ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)),
1338                     MID_TX_PLACE(tx->index));
1339                 tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) &
1340                     MID_DESCR_START;
1341         }
1342         error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited);
1343         if (!error  && txtp->min_pcr > rate) error = -EINVAL;
1344         if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR &&
1345             txtp->max_pcr < rate) error = -EINVAL;
1346         if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved)
1347                 error = -EINVAL;
1348         if (!error && set_rsv && !set_shp && rate < tx->shaping)
1349                 error = -EINVAL;
1350         if (!error && !set_rsv && rate > tx->reserved && !ubr)
1351                 error = -EINVAL;
1352         if (error) {
1353                 if (new_tx) {
1354                         tx->send = NULL;
1355                         eni_free_mem(eni_dev,mem,size);
1356                 }
1357                 return error;
1358         }
1359         txtp->pcr = rate;
1360         if (set_rsv && !ubr) {
1361                 eni_dev->tx_bw += tx->reserved;
1362                 tx->reserved = rate;
1363                 eni_dev->tx_bw -= rate;
1364         }
1365         if (set_shp || (unlimited && new_tx)) {
1366                 if (unlimited && new_tx) eni_dev->ubr = tx;
1367                 tx->prescaler = pre;
1368                 tx->resolution = res;
1369                 tx->shaping = rate;
1370         }
1371         if (set_shp) eni_vcc->tx = tx;
1372         DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping);
1373         return 0;
1374 }
1375
1376
1377 static int open_tx_first(struct atm_vcc *vcc)
1378 {
1379         ENI_VCC(vcc)->tx = NULL;
1380         if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0;
1381         ENI_VCC(vcc)->txing = 0;
1382         return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1);
1383 }
1384
1385
1386 static int open_tx_second(struct atm_vcc *vcc)
1387 {
1388         return 0; /* nothing to do */
1389 }
1390
1391
1392 static void close_tx(struct atm_vcc *vcc)
1393 {
1394         DECLARE_WAITQUEUE(wait,current);
1395         struct eni_dev *eni_dev;
1396         struct eni_vcc *eni_vcc;
1397
1398         eni_vcc = ENI_VCC(vcc);
1399         if (!eni_vcc->tx) return;
1400         eni_dev = ENI_DEV(vcc->dev);
1401         /* wait for TX queue to drain */
1402         DPRINTK("eni_close: waiting for TX ...\n");
1403         add_wait_queue(&eni_dev->tx_wait,&wait);
1404         set_current_state(TASK_UNINTERRUPTIBLE);
1405         for (;;) {
1406                 int txing;
1407
1408                 tasklet_disable(&eni_dev->task);
1409                 txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing;
1410                 tasklet_enable(&eni_dev->task);
1411                 if (!txing) break;
1412                 DPRINTK("%d TX left\n",eni_vcc->txing);
1413                 schedule();
1414                 set_current_state(TASK_UNINTERRUPTIBLE);
1415         }
1416         set_current_state(TASK_RUNNING);
1417         remove_wait_queue(&eni_dev->tx_wait,&wait);
1418         if (eni_vcc->tx != eni_dev->ubr) {
1419                 /*
1420                  * Looping a few times in here is probably far cheaper than
1421                  * keeping track of TX completions all the time, so let's poll
1422                  * a bit ...
1423                  */
1424                 while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) !=
1425                     eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index)))
1426                         schedule();
1427                 eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2);
1428                 eni_vcc->tx->send = NULL;
1429                 eni_dev->tx_bw += eni_vcc->tx->reserved;
1430         }
1431         eni_vcc->tx = NULL;
1432 }
1433
1434
1435 static int start_tx(struct atm_dev *dev)
1436 {
1437         struct eni_dev *eni_dev;
1438         int i;
1439
1440         eni_dev = ENI_DEV(dev);
1441         eni_dev->lost = 0;
1442         eni_dev->tx_bw = ATM_OC3_PCR;
1443         eni_dev->tx_mult = DEFAULT_TX_MULT;
1444         init_waitqueue_head(&eni_dev->tx_wait);
1445         eni_dev->ubr = NULL;
1446         skb_queue_head_init(&eni_dev->tx_queue);
1447         eni_out(0,MID_DMA_WR_TX);
1448         for (i = 0; i < NR_CHAN; i++) {
1449                 eni_dev->tx[i].send = NULL;
1450                 eni_dev->tx[i].index = i;
1451         }
1452         return 0;
1453 }
1454
1455
1456 /*--------------------------------- common ----------------------------------*/
1457
1458
1459 #if 0 /* may become useful again when tuning things */
1460
1461 static void foo(void)
1462 {
1463 printk(KERN_INFO
1464   "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n"
1465   "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n",
1466   tx_complete,dma_complete,queued,requeued,submitted,backlogged,
1467   rx_enqueued,rx_dequeued,putting,pushed);
1468 if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost);
1469 }
1470
1471 #endif
1472
1473
1474 static void bug_int(struct atm_dev *dev,unsigned long reason)
1475 {
1476         DPRINTK(">bug_int\n");
1477         if (reason & MID_DMA_ERR_ACK)
1478                 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1479                     "error\n",dev->number);
1480         if (reason & MID_TX_IDENT_MISM)
1481                 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident "
1482                     "mismatch\n",dev->number);
1483         if (reason & MID_TX_DMA_OVFL)
1484                 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1485                     "overflow\n",dev->number);
1486         EVENT("---dump ends here---\n",0,0);
1487         printk(KERN_NOTICE "---recent events---\n");
1488         event_dump();
1489 }
1490
1491
1492 static irqreturn_t eni_int(int irq,void *dev_id)
1493 {
1494         struct atm_dev *dev;
1495         struct eni_dev *eni_dev;
1496         u32 reason;
1497
1498         DPRINTK(">eni_int\n");
1499         dev = dev_id;
1500         eni_dev = ENI_DEV(dev);
1501         reason = eni_in(MID_ISA);
1502         DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason);
1503         /*
1504          * Must handle these two right now, because reading ISA doesn't clear
1505          * them, so they re-occur and we never make it to the tasklet. Since
1506          * they're rare, we don't mind the occasional invocation of eni_tasklet
1507          * with eni_dev->events == 0.
1508          */
1509         if (reason & MID_STAT_OVFL) {
1510                 EVENT("stat overflow\n",0,0);
1511                 eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH;
1512         }
1513         if (reason & MID_SUNI_INT) {
1514                 EVENT("SUNI int\n",0,0);
1515                 dev->phy->interrupt(dev);
1516 #if 0
1517                 foo();
1518 #endif
1519         }
1520         spin_lock(&eni_dev->lock);
1521         eni_dev->events |= reason;
1522         spin_unlock(&eni_dev->lock);
1523         tasklet_schedule(&eni_dev->task);
1524         return IRQ_HANDLED;
1525 }
1526
1527
1528 static void eni_tasklet(unsigned long data)
1529 {
1530         struct atm_dev *dev = (struct atm_dev *) data;
1531         struct eni_dev *eni_dev = ENI_DEV(dev);
1532         unsigned long flags;
1533         u32 events;
1534
1535         DPRINTK("eni_tasklet (dev %p)\n",dev);
1536         spin_lock_irqsave(&eni_dev->lock,flags);
1537         events = xchg(&eni_dev->events,0);
1538         spin_unlock_irqrestore(&eni_dev->lock,flags);
1539         if (events & MID_RX_DMA_COMPLETE) {
1540                 EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0);
1541                 dequeue_rx(dev);
1542                 EVENT("dequeue_rx done, starting poll_rx\n",0,0);
1543                 poll_rx(dev);
1544                 EVENT("poll_rx done\n",0,0);
1545                 /* poll_tx ? */
1546         }
1547         if (events & MID_SERVICE) {
1548                 EVENT("INT: service, starting get_service\n",0,0);
1549                 get_service(dev);
1550                 EVENT("get_service done, starting poll_rx\n",0,0);
1551                 poll_rx(dev);
1552                 EVENT("poll_rx done\n",0,0);
1553         }
1554         if (events & MID_TX_DMA_COMPLETE) {
1555                 EVENT("INT: TX DMA COMPLETE\n",0,0);
1556                 dequeue_tx(dev);
1557         }
1558         if (events & MID_TX_COMPLETE) {
1559                 EVENT("INT: TX COMPLETE\n",0,0);
1560 tx_complete++;
1561                 wake_up(&eni_dev->tx_wait);
1562                 /* poll_rx ? */
1563         }
1564         if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) {
1565                 EVENT("bug interrupt\n",0,0);
1566                 bug_int(dev,events);
1567         }
1568         poll_tx(dev);
1569 }
1570
1571
1572 /*--------------------------------- entries ---------------------------------*/
1573
1574
1575 static char * const media_name[] = {
1576     "MMF", "SMF", "MMF", "03?", /*  0- 3 */
1577     "UTP", "05?", "06?", "07?", /*  4- 7 */
1578     "TAXI","09?", "10?", "11?", /*  8-11 */
1579     "12?", "13?", "14?", "15?", /* 12-15 */
1580     "MMF", "SMF", "18?", "19?", /* 16-19 */
1581     "UTP", "21?", "22?", "23?", /* 20-23 */
1582     "24?", "25?", "26?", "27?", /* 24-27 */
1583     "28?", "29?", "30?", "31?"  /* 28-31 */
1584 };
1585
1586
1587 #define SET_SEPROM \
1588   ({ if (!error && !pci_error) { \
1589     pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \
1590     udelay(10); /* 10 usecs */ \
1591   } })
1592 #define GET_SEPROM \
1593   ({ if (!error && !pci_error) { \
1594     pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \
1595     udelay(10); /* 10 usecs */ \
1596   } })
1597
1598
1599 static int get_esi_asic(struct atm_dev *dev)
1600 {
1601         struct eni_dev *eni_dev;
1602         unsigned char tonga;
1603         int error,failed,pci_error;
1604         int address,i,j;
1605
1606         eni_dev = ENI_DEV(dev);
1607         error = pci_error = 0;
1608         tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK;
1609         SET_SEPROM;
1610         for (i = 0; i < ESI_LEN && !error && !pci_error; i++) {
1611                 /* start operation */
1612                 tonga |= SEPROM_DATA;
1613                 SET_SEPROM;
1614                 tonga |= SEPROM_CLK;
1615                 SET_SEPROM;
1616                 tonga &= ~SEPROM_DATA;
1617                 SET_SEPROM;
1618                 tonga &= ~SEPROM_CLK;
1619                 SET_SEPROM;
1620                 /* send address */
1621                 address = ((i+SEPROM_ESI_BASE) << 1)+1;
1622                 for (j = 7; j >= 0; j--) {
1623                         tonga = (address >> j) & 1 ? tonga | SEPROM_DATA :
1624                             tonga & ~SEPROM_DATA;
1625                         SET_SEPROM;
1626                         tonga |= SEPROM_CLK;
1627                         SET_SEPROM;
1628                         tonga &= ~SEPROM_CLK;
1629                         SET_SEPROM;
1630                 }
1631                 /* get ack */
1632                 tonga |= SEPROM_DATA;
1633                 SET_SEPROM;
1634                 tonga |= SEPROM_CLK;
1635                 SET_SEPROM;
1636                 GET_SEPROM;
1637                 failed = tonga & SEPROM_DATA;
1638                 tonga &= ~SEPROM_CLK;
1639                 SET_SEPROM;
1640                 tonga |= SEPROM_DATA;
1641                 SET_SEPROM;
1642                 if (failed) error = -EIO;
1643                 else {
1644                         dev->esi[i] = 0;
1645                         for (j = 7; j >= 0; j--) {
1646                                 dev->esi[i] <<= 1;
1647                                 tonga |= SEPROM_DATA;
1648                                 SET_SEPROM;
1649                                 tonga |= SEPROM_CLK;
1650                                 SET_SEPROM;
1651                                 GET_SEPROM;
1652                                 if (tonga & SEPROM_DATA) dev->esi[i] |= 1;
1653                                 tonga &= ~SEPROM_CLK;
1654                                 SET_SEPROM;
1655                                 tonga |= SEPROM_DATA;
1656                                 SET_SEPROM;
1657                         }
1658                         /* get ack */
1659                         tonga |= SEPROM_DATA;
1660                         SET_SEPROM;
1661                         tonga |= SEPROM_CLK;
1662                         SET_SEPROM;
1663                         GET_SEPROM;
1664                         if (!(tonga & SEPROM_DATA)) error = -EIO;
1665                         tonga &= ~SEPROM_CLK;
1666                         SET_SEPROM;
1667                         tonga |= SEPROM_DATA;
1668                         SET_SEPROM;
1669                 }
1670                 /* stop operation */
1671                 tonga &= ~SEPROM_DATA;
1672                 SET_SEPROM;
1673                 tonga |= SEPROM_CLK;
1674                 SET_SEPROM;
1675                 tonga |= SEPROM_DATA;
1676                 SET_SEPROM;
1677         }
1678         if (pci_error) {
1679                 printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI "
1680                     "(0x%02x)\n",dev->number,pci_error);
1681                 error = -EIO;
1682         }
1683         return error;
1684 }
1685
1686
1687 #undef SET_SEPROM
1688 #undef GET_SEPROM
1689
1690
1691 static int get_esi_fpga(struct atm_dev *dev, void __iomem *base)
1692 {
1693         void __iomem *mac_base;
1694         int i;
1695
1696         mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom);
1697         for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3));
1698         return 0;
1699 }
1700
1701
1702 static int eni_do_init(struct atm_dev *dev)
1703 {
1704         struct midway_eprom __iomem *eprom;
1705         struct eni_dev *eni_dev;
1706         struct pci_dev *pci_dev;
1707         unsigned long real_base;
1708         void __iomem *base;
1709         int error,i,last;
1710
1711         DPRINTK(">eni_init\n");
1712         dev->ci_range.vpi_bits = 0;
1713         dev->ci_range.vci_bits = NR_VCI_LD;
1714         dev->link_rate = ATM_OC3_PCR;
1715         eni_dev = ENI_DEV(dev);
1716         pci_dev = eni_dev->pci_dev;
1717         real_base = pci_resource_start(pci_dev, 0);
1718         eni_dev->irq = pci_dev->irq;
1719         if ((error = pci_write_config_word(pci_dev,PCI_COMMAND,
1720             PCI_COMMAND_MEMORY |
1721             (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1722                 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory "
1723                     "(0x%02x)\n",dev->number,error);
1724                 return -EIO;
1725         }
1726         printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,",
1727             dev->number,pci_dev->revision,real_base,eni_dev->irq);
1728         if (!(base = ioremap_nocache(real_base,MAP_MAX_SIZE))) {
1729                 printk("\n");
1730                 printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page "
1731                     "mapping\n",dev->number);
1732                 return -ENOMEM;
1733         }
1734         eni_dev->ioaddr = base;
1735         eni_dev->base_diff = real_base - (unsigned long) base;
1736         /* id may not be present in ASIC Tonga boards - check this @@@ */
1737         if (!eni_dev->asic) {
1738                 eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom));
1739                 if (readl(&eprom->magic) != ENI155_MAGIC) {
1740                         printk("\n");
1741                         printk(KERN_ERR DEV_LABEL
1742                                "(itf %d): bad magic - expected 0x%x, got 0x%x\n",
1743                                dev->number, ENI155_MAGIC,
1744                                (unsigned)readl(&eprom->magic));
1745                         error = -EINVAL;
1746                         goto unmap;
1747                 }
1748         }
1749         eni_dev->phy = base+PHY_BASE;
1750         eni_dev->reg = base+REG_BASE;
1751         eni_dev->ram = base+RAM_BASE;
1752         last = MAP_MAX_SIZE-RAM_BASE;
1753         for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) {
1754                 writel(0x55555555,eni_dev->ram+i);
1755                 if (readl(eni_dev->ram+i) != 0x55555555) last = i;
1756                 else {
1757                         writel(0xAAAAAAAA,eni_dev->ram+i);
1758                         if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i;
1759                         else writel(i,eni_dev->ram+i);
1760                 }
1761         }
1762         for (i = 0; i < last; i += RAM_INCREMENT)
1763                 if (readl(eni_dev->ram+i) != i) break;
1764         eni_dev->mem = i;
1765         memset_io(eni_dev->ram,0,eni_dev->mem);
1766         /* TODO: should shrink allocation now */
1767         printk("mem=%dkB (",eni_dev->mem >> 10);
1768         /* TODO: check for non-SUNI, check for TAXI ? */
1769         if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) {
1770                 printk(")\n");
1771                 printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n",
1772                     dev->number,(unsigned) eni_in(MID_RES_ID_MCON));
1773                 error = -EINVAL;
1774                 goto unmap;
1775         }
1776         error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base);
1777         if (error)
1778                 goto unmap;
1779         for (i = 0; i < ESI_LEN; i++)
1780                 printk("%s%02X",i ? "-" : "",dev->esi[i]);
1781         printk(")\n");
1782         printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number,
1783             eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA",
1784             media_name[eni_in(MID_RES_ID_MCON) & DAUGTHER_ID]);
1785
1786         error = suni_init(dev);
1787         if (error)
1788                 goto unmap;
1789 out:
1790         return error;
1791 unmap:
1792         iounmap(base);
1793         goto out;
1794 }
1795
1796 static void eni_do_release(struct atm_dev *dev)
1797 {
1798         struct eni_dev *ed = ENI_DEV(dev);
1799
1800         dev->phy->stop(dev);
1801         dev->phy = NULL;
1802         iounmap(ed->ioaddr);
1803 }
1804
1805 static int eni_start(struct atm_dev *dev)
1806 {
1807         struct eni_dev *eni_dev;
1808
1809         void __iomem *buf;
1810         unsigned long buffer_mem;
1811         int error;
1812
1813         DPRINTK(">eni_start\n");
1814         eni_dev = ENI_DEV(dev);
1815         if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) {
1816                 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
1817                     dev->number,eni_dev->irq);
1818                 error = -EAGAIN;
1819                 goto out;
1820         }
1821         pci_set_master(eni_dev->pci_dev);
1822         if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND,
1823             PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
1824             (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1825                 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+"
1826                     "master (0x%02x)\n",dev->number,error);
1827                 goto free_irq;
1828         }
1829         if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,
1830             END_SWAP_DMA))) {
1831                 printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap "
1832                     "(0x%02x)\n",dev->number,error);
1833                 goto free_irq;
1834         }
1835         /* determine addresses of internal tables */
1836         eni_dev->vci = eni_dev->ram;
1837         eni_dev->rx_dma = eni_dev->ram+NR_VCI*16;
1838         eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8;
1839         eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8;
1840         buf = eni_dev->service+NR_SERVICE*4;
1841         DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n",
1842              eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma,
1843              eni_dev->service,buf);
1844         spin_lock_init(&eni_dev->lock);
1845         tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev);
1846         eni_dev->events = 0;
1847         /* initialize memory management */
1848         buffer_mem = eni_dev->mem - (buf - eni_dev->ram);
1849         eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2;
1850         eni_dev->free_list = kmalloc_array(eni_dev->free_list_size + 1,
1851                                            sizeof(*eni_dev->free_list),
1852                                            GFP_KERNEL);
1853         if (!eni_dev->free_list) {
1854                 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
1855                     dev->number);
1856                 error = -ENOMEM;
1857                 goto free_irq;
1858         }
1859         eni_dev->free_len = 0;
1860         eni_put_free(eni_dev,buf,buffer_mem);
1861         memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */
1862         /*
1863          * byte_addr  free (k)
1864          * 0x00000000     512  VCI table
1865          * 0x00004000     496  RX DMA
1866          * 0x00005000     492  TX DMA
1867          * 0x00006000     488  service list
1868          * 0x00007000     484  buffers
1869          * 0x00080000       0  end (512kB)
1870          */
1871         eni_out(0xffffffff,MID_IE);
1872         error = start_tx(dev);
1873         if (error) goto free_list;
1874         error = start_rx(dev);
1875         if (error) goto free_list;
1876         error = dev->phy->start(dev);
1877         if (error) goto free_list;
1878         eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) |
1879             MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE,
1880             MID_MC_S);
1881             /* Tonga uses SBus INTReq1 */
1882         (void) eni_in(MID_ISA); /* clear Midway interrupts */
1883         return 0;
1884
1885 free_list:
1886         kfree(eni_dev->free_list);
1887
1888 free_irq:
1889         free_irq(eni_dev->irq, dev);
1890
1891 out:
1892         return error;
1893 }
1894
1895
1896 static void eni_close(struct atm_vcc *vcc)
1897 {
1898         DPRINTK(">eni_close\n");
1899         if (!ENI_VCC(vcc)) return;
1900         clear_bit(ATM_VF_READY,&vcc->flags);
1901         close_rx(vcc);
1902         close_tx(vcc);
1903         DPRINTK("eni_close: done waiting\n");
1904         /* deallocate memory */
1905         kfree(ENI_VCC(vcc));
1906         vcc->dev_data = NULL;
1907         clear_bit(ATM_VF_ADDR,&vcc->flags);
1908         /*foo();*/
1909 }
1910
1911
1912 static int eni_open(struct atm_vcc *vcc)
1913 {
1914         struct eni_vcc *eni_vcc;
1915         int error;
1916         short vpi = vcc->vpi;
1917         int vci = vcc->vci;
1918
1919         DPRINTK(">eni_open\n");
1920         EVENT("eni_open\n",0,0);
1921         if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1922                 vcc->dev_data = NULL;
1923         if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
1924                 set_bit(ATM_VF_ADDR,&vcc->flags);
1925         if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5)
1926                 return -EINVAL;
1927         DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi,
1928             vcc->vci);
1929         if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
1930                 eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL);
1931                 if (!eni_vcc) return -ENOMEM;
1932                 vcc->dev_data = eni_vcc;
1933                 eni_vcc->tx = NULL; /* for eni_close after open_rx */
1934                 if ((error = open_rx_first(vcc))) {
1935                         eni_close(vcc);
1936                         return error;
1937                 }
1938                 if ((error = open_tx_first(vcc))) {
1939                         eni_close(vcc);
1940                         return error;
1941                 }
1942         }
1943         if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0;
1944         if ((error = open_rx_second(vcc))) {
1945                 eni_close(vcc);
1946                 return error;
1947         }
1948         if ((error = open_tx_second(vcc))) {
1949                 eni_close(vcc);
1950                 return error;
1951         }
1952         set_bit(ATM_VF_READY,&vcc->flags);
1953         /* should power down SUNI while !ref_count @@@ */
1954         return 0;
1955 }
1956
1957
1958 static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs)
1959 {
1960         struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1961         struct eni_tx *tx = ENI_VCC(vcc)->tx;
1962         struct sk_buff *skb;
1963         int error,rate,rsv,shp;
1964
1965         if (qos->txtp.traffic_class == ATM_NONE) return 0;
1966         if (tx == eni_dev->ubr) return -EBADFD;
1967         rate = atm_pcr_goal(&qos->txtp);
1968         if (rate < 0) rate = -rate;
1969         rsv = shp = 0;
1970         if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1;
1971         if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1;
1972         if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1;
1973         if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1;
1974         if (!rsv && !shp) return 0;
1975         error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp);
1976         if (error) return error;
1977         if (shp && !(flgs & ATM_MF_IMMED)) return 0;
1978         /*
1979          * Walk through the send buffer and patch the rate information in all
1980          * segmentation buffer descriptors of this VCC.
1981          */
1982         tasklet_disable(&eni_dev->task);
1983         skb_queue_walk(&eni_dev->tx_queue, skb) {
1984                 void __iomem *dsc;
1985
1986                 if (ATM_SKB(skb)->vcc != vcc) continue;
1987                 dsc = tx->send+ENI_PRV_POS(skb)*4;
1988                 writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) |
1989                     (tx->prescaler << MID_SEG_PR_SHIFT) |
1990                     (tx->resolution << MID_SEG_RATE_SHIFT), dsc);
1991         }
1992         tasklet_enable(&eni_dev->task);
1993         return 0;
1994 }
1995
1996
1997 static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
1998 {
1999         struct eni_dev *eni_dev = ENI_DEV(dev);
2000
2001         if (cmd == ENI_MEMDUMP) {
2002                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
2003                 printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d "
2004                     "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number);
2005                 dump(dev);
2006                 return 0;
2007         }
2008         if (cmd == ENI_SETMULT) {
2009                 struct eni_multipliers mult;
2010
2011                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
2012                 if (copy_from_user(&mult, arg,
2013                     sizeof(struct eni_multipliers)))
2014                         return -EFAULT;
2015                 if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) ||
2016                     mult.tx > 65536 || mult.rx > 65536)
2017                         return -EINVAL;
2018                 if (mult.tx) eni_dev->tx_mult = mult.tx;
2019                 if (mult.rx) eni_dev->rx_mult = mult.rx;
2020                 return 0;
2021         }
2022         if (cmd == ATM_SETCIRANGE) {
2023                 struct atm_cirange ci;
2024
2025                 if (copy_from_user(&ci, arg,sizeof(struct atm_cirange)))
2026                         return -EFAULT;
2027                 if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) &&
2028                     (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX))
2029                     return 0;
2030                 return -EINVAL;
2031         }
2032         if (!dev->phy->ioctl) return -ENOIOCTLCMD;
2033         return dev->phy->ioctl(dev,cmd,arg);
2034 }
2035
2036
2037 static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname,
2038     void __user *optval,int optlen)
2039 {
2040         return -EINVAL;
2041 }
2042
2043
2044 static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname,
2045     void __user *optval,unsigned int optlen)
2046 {
2047         return -EINVAL;
2048 }
2049
2050
2051 static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb)
2052 {
2053         enum enq_res res;
2054
2055         DPRINTK(">eni_send\n");
2056         if (!ENI_VCC(vcc)->tx) {
2057                 if (vcc->pop) vcc->pop(vcc,skb);
2058                 else dev_kfree_skb(skb);
2059                 return -EINVAL;
2060         }
2061         if (!skb) {
2062                 printk(KERN_CRIT "!skb in eni_send ?\n");
2063                 if (vcc->pop) vcc->pop(vcc,skb);
2064                 return -EINVAL;
2065         }
2066         if (vcc->qos.aal == ATM_AAL0) {
2067                 if (skb->len != ATM_CELL_SIZE-1) {
2068                         if (vcc->pop) vcc->pop(vcc,skb);
2069                         else dev_kfree_skb(skb);
2070                         return -EINVAL;
2071                 }
2072                 *(u32 *) skb->data = htonl(*(u32 *) skb->data);
2073         }
2074 submitted++;
2075         ATM_SKB(skb)->vcc = vcc;
2076         tasklet_disable(&ENI_DEV(vcc->dev)->task);
2077         res = do_tx(skb);
2078         tasklet_enable(&ENI_DEV(vcc->dev)->task);
2079         if (res == enq_ok) return 0;
2080         skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb);
2081 backlogged++;
2082         tasklet_schedule(&ENI_DEV(vcc->dev)->task);
2083         return 0;
2084 }
2085
2086 static void eni_phy_put(struct atm_dev *dev,unsigned char value,
2087     unsigned long addr)
2088 {
2089         writel(value,ENI_DEV(dev)->phy+addr*4);
2090 }
2091
2092
2093
2094 static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr)
2095 {
2096         return readl(ENI_DEV(dev)->phy+addr*4);
2097 }
2098
2099
2100 static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page)
2101 {
2102         struct sock *s;
2103         static const char *signal[] = { "LOST","unknown","okay" };
2104         struct eni_dev *eni_dev = ENI_DEV(dev);
2105         struct atm_vcc *vcc;
2106         int left,i;
2107
2108         left = *pos;
2109         if (!left)
2110                 return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, "
2111                     "%d cps remaining\n",dev->number,signal[(int) dev->signal],
2112                     eni_dev->mem >> 10,eni_dev->tx_bw);
2113         if (!--left)
2114                 return sprintf(page,"%4sBursts: TX"
2115 #if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \
2116     !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \
2117     !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \
2118     !defined(CONFIG_ATM_ENI_BURST_TX_2W)
2119                     " none"
2120 #endif
2121 #ifdef CONFIG_ATM_ENI_BURST_TX_16W
2122                     " 16W"
2123 #endif
2124 #ifdef CONFIG_ATM_ENI_BURST_TX_8W
2125                     " 8W"
2126 #endif
2127 #ifdef CONFIG_ATM_ENI_BURST_TX_4W
2128                     " 4W"
2129 #endif
2130 #ifdef CONFIG_ATM_ENI_BURST_TX_2W
2131                     " 2W"
2132 #endif
2133                     ", RX"
2134 #if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \
2135     !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \
2136     !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \
2137     !defined(CONFIG_ATM_ENI_BURST_RX_2W)
2138                     " none"
2139 #endif
2140 #ifdef CONFIG_ATM_ENI_BURST_RX_16W
2141                     " 16W"
2142 #endif
2143 #ifdef CONFIG_ATM_ENI_BURST_RX_8W
2144                     " 8W"
2145 #endif
2146 #ifdef CONFIG_ATM_ENI_BURST_RX_4W
2147                     " 4W"
2148 #endif
2149 #ifdef CONFIG_ATM_ENI_BURST_RX_2W
2150                     " 2W"
2151 #endif
2152 #ifndef CONFIG_ATM_ENI_TUNE_BURST
2153                     " (default)"
2154 #endif
2155                     "\n","");
2156         if (!--left)
2157                 return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n",
2158                     "",eni_dev->tx_mult,eni_dev->rx_mult);
2159         for (i = 0; i < NR_CHAN; i++) {
2160                 struct eni_tx *tx = eni_dev->tx+i;
2161
2162                 if (!tx->send) continue;
2163                 if (!--left) {
2164                         return sprintf(page, "tx[%d]:    0x%lx-0x%lx "
2165                             "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i,
2166                             (unsigned long) (tx->send - eni_dev->ram),
2167                             tx->send-eni_dev->ram+tx->words*4-1,tx->words*4,
2168                             tx->reserved,tx->shaping,
2169                             tx == eni_dev->ubr ? " (UBR)" : "");
2170                 }
2171                 if (--left) continue;
2172                 return sprintf(page,"%10sbacklog %u packets\n","",
2173                     skb_queue_len(&tx->backlog));
2174         }
2175         read_lock(&vcc_sklist_lock);
2176         for(i = 0; i < VCC_HTABLE_SIZE; ++i) {
2177                 struct hlist_head *head = &vcc_hash[i];
2178
2179                 sk_for_each(s, head) {
2180                         struct eni_vcc *eni_vcc;
2181                         int length;
2182
2183                         vcc = atm_sk(s);
2184                         if (vcc->dev != dev)
2185                                 continue;
2186                         eni_vcc = ENI_VCC(vcc);
2187                         if (--left) continue;
2188                         length = sprintf(page,"vcc %4d: ",vcc->vci);
2189                         if (eni_vcc->rx) {
2190                                 length += sprintf(page+length, "0x%lx-0x%lx "
2191                                     "(%6ld bytes)",
2192                                     (unsigned long) (eni_vcc->recv - eni_dev->ram),
2193                                     eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1,
2194                                     eni_vcc->words*4);
2195                                 if (eni_vcc->tx) length += sprintf(page+length,", ");
2196                         }
2197                         if (eni_vcc->tx)
2198                                 length += sprintf(page+length,"tx[%d], txing %d bytes",
2199                                     eni_vcc->tx->index,eni_vcc->txing);
2200                         page[length] = '\n';
2201                         read_unlock(&vcc_sklist_lock);
2202                         return length+1;
2203                 }
2204         }
2205         read_unlock(&vcc_sklist_lock);
2206         for (i = 0; i < eni_dev->free_len; i++) {
2207                 struct eni_free *fe = eni_dev->free_list+i;
2208                 unsigned long offset;
2209
2210                 if (--left) continue;
2211                 offset = (unsigned long) eni_dev->ram+eni_dev->base_diff;
2212                 return sprintf(page,"free      %p-%p (%6d bytes)\n",
2213                     fe->start-offset,fe->start-offset+(1 << fe->order)-1,
2214                     1 << fe->order);
2215         }
2216         return 0;
2217 }
2218
2219
2220 static const struct atmdev_ops ops = {
2221         .open           = eni_open,
2222         .close          = eni_close,
2223         .ioctl          = eni_ioctl,
2224         .getsockopt     = eni_getsockopt,
2225         .setsockopt     = eni_setsockopt,
2226         .send           = eni_send,
2227         .phy_put        = eni_phy_put,
2228         .phy_get        = eni_phy_get,
2229         .change_qos     = eni_change_qos,
2230         .proc_read      = eni_proc_read
2231 };
2232
2233
2234 static int eni_init_one(struct pci_dev *pci_dev,
2235                         const struct pci_device_id *ent)
2236 {
2237         struct atm_dev *dev;
2238         struct eni_dev *eni_dev;
2239         struct eni_zero *zero;
2240         int rc;
2241
2242         rc = pci_enable_device(pci_dev);
2243         if (rc < 0)
2244                 goto out;
2245
2246         rc = dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(32));
2247         if (rc < 0)
2248                 goto err_disable;
2249
2250         rc = -ENOMEM;
2251         eni_dev = kmalloc(sizeof(struct eni_dev), GFP_KERNEL);
2252         if (!eni_dev)
2253                 goto err_disable;
2254
2255         zero = &eni_dev->zero;
2256         zero->addr = dma_alloc_coherent(&pci_dev->dev,
2257                                         ENI_ZEROES_SIZE, &zero->dma, GFP_KERNEL);
2258         if (!zero->addr)
2259                 goto err_kfree;
2260
2261         dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL);
2262         if (!dev)
2263                 goto err_free_consistent;
2264
2265         dev->dev_data = eni_dev;
2266         pci_set_drvdata(pci_dev, dev);
2267         eni_dev->pci_dev = pci_dev;
2268         eni_dev->asic = ent->driver_data;
2269
2270         rc = eni_do_init(dev);
2271         if (rc < 0)
2272                 goto err_unregister;
2273
2274         rc = eni_start(dev);
2275         if (rc < 0)
2276                 goto err_eni_release;
2277
2278         eni_dev->more = eni_boards;
2279         eni_boards = dev;
2280 out:
2281         return rc;
2282
2283 err_eni_release:
2284         dev->phy = NULL;
2285         iounmap(ENI_DEV(dev)->ioaddr);
2286 err_unregister:
2287         atm_dev_deregister(dev);
2288 err_free_consistent:
2289         dma_free_coherent(&pci_dev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2290 err_kfree:
2291         kfree(eni_dev);
2292 err_disable:
2293         pci_disable_device(pci_dev);
2294         goto out;
2295 }
2296
2297
2298 static struct pci_device_id eni_pci_tbl[] = {
2299         { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_FPGA), 0 /* FPGA */ },
2300         { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_ASIC), 1 /* ASIC */ },
2301         { 0, }
2302 };
2303 MODULE_DEVICE_TABLE(pci,eni_pci_tbl);
2304
2305
2306 static void eni_remove_one(struct pci_dev *pdev)
2307 {
2308         struct atm_dev *dev = pci_get_drvdata(pdev);
2309         struct eni_dev *ed = ENI_DEV(dev);
2310         struct eni_zero *zero = &ed->zero;
2311
2312         eni_do_release(dev);
2313         atm_dev_deregister(dev);
2314         dma_free_coherent(&pdev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2315         kfree(ed);
2316         pci_disable_device(pdev);
2317 }
2318
2319
2320 static struct pci_driver eni_driver = {
2321         .name           = DEV_LABEL,
2322         .id_table       = eni_pci_tbl,
2323         .probe          = eni_init_one,
2324         .remove         = eni_remove_one,
2325 };
2326
2327
2328 static int __init eni_init(void)
2329 {
2330         struct sk_buff *skb; /* dummy for sizeof */
2331
2332         if (sizeof(skb->cb) < sizeof(struct eni_skb_prv)) {
2333                 printk(KERN_ERR "eni_detect: skb->cb is too small (%Zd < %Zd)\n",
2334                     sizeof(skb->cb),sizeof(struct eni_skb_prv));
2335                 return -EIO;
2336         }
2337         return pci_register_driver(&eni_driver);
2338 }
2339
2340
2341 module_init(eni_init);
2342 /* @@@ since exit routine not defined, this module can not be unloaded */
2343
2344 MODULE_LICENSE("GPL");