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   1 /* drivers/atm/eni.c - Efficient Networks ENI155P device driver */
   2
   3 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
   4
   5
   6 #include <linux/module.h>
   7 #include <linux/config.h>
   8 #include <linux/kernel.h>
   9 #include <linux/mm.h>
  10 #include <linux/pci.h>
  11 #include <linux/errno.h>
  12 #include <linux/atm.h>
  13 #include <linux/atmdev.h>
  14 #include <linux/sonet.h>
  15 #include <linux/skbuff.h>
  16 #include <linux/time.h>
  17 #include <linux/delay.h>
  18 #include <linux/uio.h>
  19 #include <linux/init.h>
  20 #include <linux/atm_eni.h>
  21 #include <linux/bitops.h>
  22 #include <asm/system.h>
  23 #include <asm/io.h>
  24 #include <asm/atomic.h>
  25 #include <asm/uaccess.h>
  26 #include <asm/string.h>
  27 #include <asm/byteorder.h>
  28
  29 #include "tonga.h"
  30 #include "midway.h"
  31 #include "suni.h"
  32 #include "eni.h"
  33
  34 #if !defined(__i386__) && !defined(__x86_64__)
  35 #ifndef ioremap_nocache
  36 #define ioremap_nocache(X,Y) ioremap(X,Y)
  37 #endif
  38 #endif
  39
  40 /*
  41  * TODO:
  42  *
  43  * Show stoppers
  44  *  none
  45  *
  46  * Minor
  47  *  - OAM support
  48  *  - fix bugs listed below
  49  */
  50
  51 /*
  52  * KNOWN BUGS:
  53  *
  54  * - may run into JK-JK bug and deadlock
  55  * - should allocate UBR channel first
  56  * - buffer space allocation algorithm is stupid
  57  *   (RX: should be maxSDU+maxdelay*rate
  58  *    TX: should be maxSDU+min(maxSDU,maxdelay*rate) )
  59  * - doesn't support OAM cells
  60  * - eni_put_free may hang if not putting memory fragments that _complete_
  61  *   2^n block (never happens in real life, though)
  62  */
  63
  64
  65 #if 0
  66 #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
  67 #else
  68 #define DPRINTK(format,args...)
  69 #endif
  70
  71
  72 #ifndef CONFIG_ATM_ENI_TUNE_BURST
  73 #define CONFIG_ATM_ENI_BURST_TX_8W
  74 #define CONFIG_ATM_ENI_BURST_RX_4W
  75 #endif
  76
  77
  78 #ifndef CONFIG_ATM_ENI_DEBUG
  79
  80
  81 #define NULLCHECK(x)
  82
  83 #define EVENT(s,a,b)
  84
  85
  86 static void event_dump(void)
  87 {
  88 }
  89
  90
  91 #else
  92
  93
  94 /*
  95  * NULL pointer checking
  96  */
  97
  98 #define NULLCHECK(x) \
  99         if ((unsigned long) (x) < 0x30) \
 100                 printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x))
 101
 102 /*
 103  * Very extensive activity logging. Greatly improves bug detection speed but
 104  * costs a few Mbps if enabled.
 105  */
 106
 107 #define EV 64
 108
 109 static const char *ev[EV];
 110 static unsigned long ev_a[EV],ev_b[EV];
 111 static int ec = 0;
 112
 113
 114 static void EVENT(const char *s,unsigned long a,unsigned long b)
 115 {
 116         ev[ec] = s;
 117         ev_a[ec] = a;
 118         ev_b[ec] = b;
 119         ec = (ec+1) % EV;
 120 }
 121
 122
 123 static void event_dump(void)
 124 {
 125         int n,i;
 126
 127         for (n = 0; n < EV; n++) {
 128                 i = (ec+n) % EV;
 129                 printk(KERN_NOTICE);
 130                 printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]);
 131         }
 132 }
 133
 134
 135 #endif /* CONFIG_ATM_ENI_DEBUG */
 136
 137
 138 /*
 139  * NExx   must not be equal at end
 140  * EExx   may be equal at end
 141  * xxPJOK verify validity of pointer jumps
 142  * xxPMOK operating on a circular buffer of "c" words
 143  */
 144
 145 #define NEPJOK(a0,a1,b) \
 146     ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1))
 147 #define EEPJOK(a0,a1,b) \
 148     ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1))
 149 #define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b)
 150 #define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b)
 151
 152
 153 static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0,
 154   backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0,
 155   putting = 0;
 156
 157 static struct atm_dev *eni_boards = NULL;
 158
 159 static u32 *cpu_zeroes = NULL; /* aligned "magic" zeroes */
 160 static dma_addr_t zeroes;
 161
 162 /* Read/write registers on card */
 163 #define eni_in(r)       readl(eni_dev->reg+(r)*4)
 164 #define eni_out(v,r)    writel((v),eni_dev->reg+(r)*4)
 165
 166
 167 /*-------------------------------- utilities --------------------------------*/
 168
 169
 170 static void dump_mem(struct eni_dev *eni_dev)
 171 {
 172         int i;
 173
 174         for (i = 0; i < eni_dev->free_len; i++)
 175                 printk(KERN_DEBUG "  %d: %p %d\n",i,
 176                     eni_dev->free_list[i].start,
 177                     1 << eni_dev->free_list[i].order);
 178 }
 179
 180
 181 static void dump(struct atm_dev *dev)
 182 {
 183         struct eni_dev *eni_dev;
 184
 185         int i;
 186
 187         eni_dev = ENI_DEV(dev);
 188         printk(KERN_NOTICE "Free memory\n");
 189         dump_mem(eni_dev);
 190         printk(KERN_NOTICE "TX buffers\n");
 191         for (i = 0; i < NR_CHAN; i++)
 192                 if (eni_dev->tx[i].send)
 193                         printk(KERN_NOTICE "  TX %d @ %p: %ld\n",i,
 194                             eni_dev->tx[i].send,eni_dev->tx[i].words*4);
 195         printk(KERN_NOTICE "RX buffers\n");
 196         for (i = 0; i < 1024; i++)
 197                 if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx)
 198                         printk(KERN_NOTICE "  RX %d @ %p: %ld\n",i,
 199                             ENI_VCC(eni_dev->rx_map[i])->recv,
 200                             ENI_VCC(eni_dev->rx_map[i])->words*4);
 201         printk(KERN_NOTICE "----\n");
 202 }
 203
 204
 205 static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start,
 206     unsigned long size)
 207 {
 208         struct eni_free *list;
 209         int len,order;
 210
 211         DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size);
 212         start += eni_dev->base_diff;
 213         list = eni_dev->free_list;
 214         len = eni_dev->free_len;
 215         while (size) {
 216                 if (len >= eni_dev->free_list_size) {
 217                         printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n",
 218                             start,size);
 219                         break;
 220                 }
 221                 for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++);
 222                 if (MID_MIN_BUF_SIZE > (1 << order)) {
 223                         printk(KERN_CRIT "eni_put_free: order %d too small\n",
 224                             order);
 225                         break;
 226                 }
 227                 list[len].start = (void __iomem *) start;
 228                 list[len].order = order;
 229                 len++;
 230                 start += 1 << order;
 231                 size -= 1 << order;
 232         }
 233         eni_dev->free_len = len;
 234         /*dump_mem(eni_dev);*/
 235 }
 236
 237
 238 static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size)
 239 {
 240         struct eni_free *list;
 241         void __iomem *start;
 242         int len,i,order,best_order,index;
 243
 244         list = eni_dev->free_list;
 245         len = eni_dev->free_len;
 246         if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE;
 247         if (*size > MID_MAX_BUF_SIZE) return NULL;
 248         for (order = 0; (1 << order) < *size; order++);
 249         DPRINTK("trying: %ld->%d\n",*size,order);
 250         best_order = 65; /* we don't have more than 2^64 of anything ... */
 251         index = 0; /* silence GCC */
 252         for (i = 0; i < len; i++)
 253                 if (list[i].order == order) {
 254                         best_order = order;
 255                         index = i;
 256                         break;
 257                 }
 258                 else if (best_order > list[i].order && list[i].order > order) {
 259                                 best_order = list[i].order;
 260                                 index = i;
 261                         }
 262         if (best_order == 65) return NULL;
 263         start = list[index].start-eni_dev->base_diff;
 264         list[index] = list[--len];
 265         eni_dev->free_len = len;
 266         *size = 1 << order;
 267         eni_put_free(eni_dev,start+*size,(1 << best_order)-*size);
 268         DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start);
 269         memset_io(start,0,*size);       /* never leak data */
 270         /*dump_mem(eni_dev);*/
 271         return start;
 272 }
 273
 274
 275 static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start,
 276     unsigned long size)
 277 {
 278         struct eni_free *list;
 279         int len,i,order;
 280
 281         start += eni_dev->base_diff;
 282         list = eni_dev->free_list;
 283         len = eni_dev->free_len;
 284         for (order = -1; size; order++) size >>= 1;
 285         DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order);
 286         for (i = 0; i < len; i++)
 287                 if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) &&
 288                     list[i].order == order) {
 289                         DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i,
 290                             list[i].start,start,1 << order,list[i].order,order);
 291                         list[i] = list[--len];
 292                         start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order));
 293                         order++;
 294                         i = -1;
 295                         continue;
 296                 }
 297         if (len >= eni_dev->free_list_size) {
 298                 printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start,
 299                     order);
 300                 return;
 301         }
 302         list[len].start = start;
 303         list[len].order = order;
 304         eni_dev->free_len = len+1;
 305         /*dump_mem(eni_dev);*/
 306 }
 307
 308
 309 /*----------------------------------- RX ------------------------------------*/
 310
 311
 312 #define ENI_VCC_NOS ((struct atm_vcc *) 1)
 313
 314
 315 static void rx_ident_err(struct atm_vcc *vcc)
 316 {
 317         struct atm_dev *dev;
 318         struct eni_dev *eni_dev;
 319         struct eni_vcc *eni_vcc;
 320
 321         dev = vcc->dev;
 322         eni_dev = ENI_DEV(dev);
 323         /* immediately halt adapter */
 324         eni_out(eni_in(MID_MC_S) &
 325             ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S);
 326         /* dump useful information */
 327         eni_vcc = ENI_VCC(vcc);
 328         printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident "
 329             "mismatch\n",dev->number);
 330         printk(KERN_ALERT "  VCI %d, rxing %d, words %ld\n",vcc->vci,
 331             eni_vcc->rxing,eni_vcc->words);
 332         printk(KERN_ALERT "  host descr 0x%lx, rx pos 0x%lx, descr value "
 333             "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos,
 334             (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4));
 335         printk(KERN_ALERT "  last %p, servicing %d\n",eni_vcc->last,
 336             eni_vcc->servicing);
 337         EVENT("---dump ends here---\n",0,0);
 338         printk(KERN_NOTICE "---recent events---\n");
 339         event_dump();
 340         ENI_DEV(dev)->fast = NULL; /* really stop it */
 341         ENI_DEV(dev)->slow = NULL;
 342         skb_queue_head_init(&ENI_DEV(dev)->rx_queue);
 343 }
 344
 345
 346 static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb,
 347     unsigned long skip,unsigned long size,unsigned long eff)
 348 {
 349         struct eni_dev *eni_dev;
 350         struct eni_vcc *eni_vcc;
 351         u32 dma_rd,dma_wr;
 352         u32 dma[RX_DMA_BUF*2];
 353         dma_addr_t paddr;
 354         unsigned long here;
 355         int i,j;
 356
 357         eni_dev = ENI_DEV(vcc->dev);
 358         eni_vcc = ENI_VCC(vcc);
 359         paddr = 0; /* GCC, shut up */
 360         if (skb) {
 361                 paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len,
 362                     PCI_DMA_FROMDEVICE);
 363                 ENI_PRV_PADDR(skb) = paddr;
 364                 if (paddr & 3)
 365                         printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has "
 366                             "mis-aligned RX data (0x%lx)\n",vcc->dev->number,
 367                             vcc->vci,(unsigned long) paddr);
 368                 ENI_PRV_SIZE(skb) = size+skip;
 369                     /* PDU plus descriptor */
 370                 ATM_SKB(skb)->vcc = vcc;
 371         }
 372         j = 0;
 373         if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */
 374                 here = (eni_vcc->descr+skip) & (eni_vcc->words-1);
 375                 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci
 376                     << MID_DMA_VCI_SHIFT) | MID_DT_JK;
 377                 j++;
 378         }
 379         here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1);
 380         if (!eff) size += skip;
 381         else {
 382                 unsigned long words;
 383
 384                 if (!size) {
 385                         DPRINTK("strange things happen ...\n");
 386                         EVENT("strange things happen ... (skip=%ld,eff=%ld)\n",
 387                             size,eff);
 388                 }
 389                 words = eff;
 390                 if (paddr & 15) {
 391                         unsigned long init;
 392
 393                         init = 4-((paddr & 15) >> 2);
 394                         if (init > words) init = words;
 395                         dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
 396                             (vcc->vci << MID_DMA_VCI_SHIFT);
 397                         dma[j++] = paddr;
 398                         paddr += init << 2;
 399                         words -= init;
 400                 }
 401 #ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */
 402                 if (words & ~15) {
 403                         dma[j++] = MID_DT_16W | ((words >> 4) <<
 404                             MID_DMA_COUNT_SHIFT) | (vcc->vci <<
 405                             MID_DMA_VCI_SHIFT);
 406                         dma[j++] = paddr;
 407                         paddr += (words & ~15) << 2;
 408                         words &= 15;
 409                 }
 410 #endif
 411 #ifdef CONFIG_ATM_ENI_BURST_RX_8W  /* works only with *some* PCI chipsets ... */
 412                 if (words & ~7) {
 413                         dma[j++] = MID_DT_8W | ((words >> 3) <<
 414                             MID_DMA_COUNT_SHIFT) | (vcc->vci <<
 415                             MID_DMA_VCI_SHIFT);
 416                         dma[j++] = paddr;
 417                         paddr += (words & ~7) << 2;
 418                         words &= 7;
 419                 }
 420 #endif
 421 #ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */
 422                 if (words & ~3) {
 423                         dma[j++] = MID_DT_4W | ((words >> 2) <<
 424                             MID_DMA_COUNT_SHIFT) | (vcc->vci <<
 425                             MID_DMA_VCI_SHIFT);
 426                         dma[j++] = paddr;
 427                         paddr += (words & ~3) << 2;
 428                         words &= 3;
 429                 }
 430 #endif
 431 #ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */
 432                 if (words & ~1) {
 433                         dma[j++] = MID_DT_2W | ((words >> 1) <<
 434                             MID_DMA_COUNT_SHIFT) | (vcc->vci <<
 435                             MID_DMA_VCI_SHIFT);
 436                         dma[j++] = paddr;
 437                         paddr += (words & ~1) << 2;
 438                         words &= 1;
 439                 }
 440 #endif
 441                 if (words) {
 442                         dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT)
 443                             | (vcc->vci << MID_DMA_VCI_SHIFT);
 444                         dma[j++] = paddr;
 445                 }
 446         }
 447         if (size != eff) {
 448                 dma[j++] = (here << MID_DMA_COUNT_SHIFT) |
 449                     (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK;
 450                 j++;
 451         }
 452         if (!j || j > 2*RX_DMA_BUF) {
 453                 printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n");
 454                 goto trouble;
 455         }
 456         dma[j-2] |= MID_DMA_END;
 457         j = j >> 1;
 458         dma_wr = eni_in(MID_DMA_WR_RX);
 459         dma_rd = eni_in(MID_DMA_RD_RX);
 460         /*
 461          * Can I move the dma_wr pointer by 2j+1 positions without overwriting
 462          * data that hasn't been read (position of dma_rd) yet ?
 463          */
 464         if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */
 465                 printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n",
 466                     vcc->dev->number);
 467                 goto trouble;
 468         }
 469         for (i = 0; i < j; i++) {
 470                 writel(dma[i*2],eni_dev->rx_dma+dma_wr*8);
 471                 writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4);
 472                 dma_wr = (dma_wr+1) & (NR_DMA_RX-1);
 473         }
 474         if (skb) {
 475                 ENI_PRV_POS(skb) = eni_vcc->descr+size+1;
 476                 skb_queue_tail(&eni_dev->rx_queue,skb);
 477                 eni_vcc->last = skb;
 478 rx_enqueued++;
 479         }
 480         eni_vcc->descr = here;
 481         eni_out(dma_wr,MID_DMA_WR_RX);
 482         return 0;
 483
 484 trouble:
 485         if (paddr)
 486                 pci_unmap_single(eni_dev->pci_dev,paddr,skb->len,
 487                     PCI_DMA_FROMDEVICE);
 488         if (skb) dev_kfree_skb_irq(skb);
 489         return -1;
 490 }
 491
 492
 493 static void discard(struct atm_vcc *vcc,unsigned long size)
 494 {
 495         struct eni_vcc *eni_vcc;
 496
 497         eni_vcc = ENI_VCC(vcc);
 498         EVENT("discard (size=%ld)\n",size,0);
 499         while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0);
 500             /* could do a full fallback, but that might be more expensive */
 501         if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1;
 502         else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1);
 503 }
 504
 505
 506 /*
 507  * TODO: should check whether direct copies (without DMA setup, dequeuing on
 508  * interrupt, etc.) aren't much faster for AAL0
 509  */
 510
 511 static int rx_aal0(struct atm_vcc *vcc)
 512 {
 513         struct eni_vcc *eni_vcc;
 514         unsigned long descr;
 515         unsigned long length;
 516         struct sk_buff *skb;
 517
 518         DPRINTK(">rx_aal0\n");
 519         eni_vcc = ENI_VCC(vcc);
 520         descr = readl(eni_vcc->recv+eni_vcc->descr*4);
 521         if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
 522                 rx_ident_err(vcc);
 523                 return 1;
 524         }
 525         if (descr & MID_RED_T) {
 526                 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
 527                     vcc->dev->number);
 528                 length = 0;
 529                 atomic_inc(&vcc->stats->rx_err);
 530         }
 531         else {
 532                 length = ATM_CELL_SIZE-1; /* no HEC */
 533         }
 534         skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL;
 535         if (!skb) {
 536                 discard(vcc,length >> 2);
 537                 return 0;
 538         }
 539         skb_put(skb,length);
 540         skb_set_timestamp(skb, &eni_vcc->timestamp);
 541         DPRINTK("got len %ld\n",length);
 542         if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1;
 543         eni_vcc->rxing++;
 544         return 0;
 545 }
 546
 547
 548 static int rx_aal5(struct atm_vcc *vcc)
 549 {
 550         struct eni_vcc *eni_vcc;
 551         unsigned long descr;
 552         unsigned long size,eff,length;
 553         struct sk_buff *skb;
 554
 555         EVENT("rx_aal5\n",0,0);
 556         DPRINTK(">rx_aal5\n");
 557         eni_vcc = ENI_VCC(vcc);
 558         descr = readl(eni_vcc->recv+eni_vcc->descr*4);
 559         if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
 560                 rx_ident_err(vcc);
 561                 return 1;
 562         }
 563         if (descr & (MID_RED_T | MID_RED_CRC_ERR)) {
 564                 if (descr & MID_RED_T) {
 565                         EVENT("empty cell (descr=0x%lx)\n",descr,0);
 566                         DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
 567                             vcc->dev->number);
 568                         size = 0;
 569                 }
 570                 else {
 571                         static unsigned long silence = 0;
 572
 573                         if (time_after(jiffies, silence) || silence == 0) {
 574                                 printk(KERN_WARNING DEV_LABEL "(itf %d): "
 575                                     "discarding PDU(s) with CRC error\n",
 576                                     vcc->dev->number);
 577                                 silence = (jiffies+2*HZ)|1;
 578                         }
 579                         size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
 580                         EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr,
 581                             size);
 582                 }
 583                 eff = length = 0;
 584                 atomic_inc(&vcc->stats->rx_err);
 585         }
 586         else {
 587                 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
 588                 DPRINTK("size=%ld\n",size);
 589                 length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) &
 590                     (eni_vcc->words-1)))*4) & 0xffff;
 591                                 /* -trailer(2)+header(1) */
 592                 if (length && length <= (size << 2)-8 && length <=
 593                   ATM_MAX_AAL5_PDU) eff = (length+3) >> 2;
 594                 else {                           /* ^ trailer length (8) */
 595                         EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr,
 596                             length);
 597                         printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU "
 598                             "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n",
 599                             vcc->dev->number,vcc->vci,length,size << 2,descr);
 600                         length = eff = 0;
 601                         atomic_inc(&vcc->stats->rx_err);
 602                 }
 603         }
 604         skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL;
 605         if (!skb) {
 606                 discard(vcc,size);
 607                 return 0;
 608         }
 609         skb_put(skb,length);
 610         DPRINTK("got len %ld\n",length);
 611         if (do_rx_dma(vcc,skb,1,size,eff)) return 1;
 612         eni_vcc->rxing++;
 613         return 0;
 614 }
 615
 616
 617 static inline int rx_vcc(struct atm_vcc *vcc)
 618 {
 619         void __iomem *vci_dsc;
 620         unsigned long tmp;
 621         struct eni_vcc *eni_vcc;
 622
 623         eni_vcc = ENI_VCC(vcc);
 624         vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16;
 625         EVENT("rx_vcc(1)\n",0,0);
 626         while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >>
 627             MID_VCI_DESCR_SHIFT)) {
 628                 EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n",
 629                     eni_vcc->descr,tmp);
 630                 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
 631                     (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
 632                     MID_VCI_DESCR_SHIFT));
 633                 if (ENI_VCC(vcc)->rx(vcc)) return 1;
 634         }
 635         /* clear IN_SERVICE flag */
 636         writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc);
 637         /*
 638          * If new data has arrived between evaluating the while condition and
 639          * clearing IN_SERVICE, we wouldn't be notified until additional data
 640          * follows. So we have to loop again to be sure.
 641          */
 642         EVENT("rx_vcc(3)\n",0,0);
 643         while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR)
 644             >> MID_VCI_DESCR_SHIFT)) {
 645                 EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n",
 646                     eni_vcc->descr,tmp);
 647                 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
 648                     (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
 649                     MID_VCI_DESCR_SHIFT));
 650                 if (ENI_VCC(vcc)->rx(vcc)) return 1;
 651         }
 652         return 0;
 653 }
 654
 655
 656 static void poll_rx(struct atm_dev *dev)
 657 {
 658         struct eni_dev *eni_dev;
 659         struct atm_vcc *curr;
 660
 661         eni_dev = ENI_DEV(dev);
 662         while ((curr = eni_dev->fast)) {
 663                 EVENT("poll_rx.fast\n",0,0);
 664                 if (rx_vcc(curr)) return;
 665                 eni_dev->fast = ENI_VCC(curr)->next;
 666                 ENI_VCC(curr)->next = ENI_VCC_NOS;
 667                 barrier();
 668                 ENI_VCC(curr)->servicing--;
 669         }
 670         while ((curr = eni_dev->slow)) {
 671                 EVENT("poll_rx.slow\n",0,0);
 672                 if (rx_vcc(curr)) return;
 673                 eni_dev->slow = ENI_VCC(curr)->next;
 674                 ENI_VCC(curr)->next = ENI_VCC_NOS;
 675                 barrier();
 676                 ENI_VCC(curr)->servicing--;
 677         }
 678 }
 679
 680
 681 static void get_service(struct atm_dev *dev)
 682 {
 683         struct eni_dev *eni_dev;
 684         struct atm_vcc *vcc;
 685         unsigned long vci;
 686
 687         DPRINTK(">get_service\n");
 688         eni_dev = ENI_DEV(dev);
 689         while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) {
 690                 vci = readl(eni_dev->service+eni_dev->serv_read*4);
 691                 eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1);
 692                 vcc = eni_dev->rx_map[vci & 1023];
 693                 if (!vcc) {
 694                         printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not "
 695                             "found\n",dev->number,vci);
 696                         continue; /* nasty but we try to go on anyway */
 697                         /* @@@ nope, doesn't work */
 698                 }
 699                 EVENT("getting from service\n",0,0);
 700                 if (ENI_VCC(vcc)->next != ENI_VCC_NOS) {
 701                         EVENT("double service\n",0,0);
 702                         DPRINTK("Grr, servicing VCC %ld twice\n",vci);
 703                         continue;
 704                 }
 705                 do_gettimeofday(&ENI_VCC(vcc)->timestamp);
 706                 ENI_VCC(vcc)->next = NULL;
 707                 if (vcc->qos.rxtp.traffic_class == ATM_CBR) {
 708                         if (eni_dev->fast)
 709                                 ENI_VCC(eni_dev->last_fast)->next = vcc;
 710                         else eni_dev->fast = vcc;
 711                         eni_dev->last_fast = vcc;
 712                 }
 713                 else {
 714                         if (eni_dev->slow)
 715                                 ENI_VCC(eni_dev->last_slow)->next = vcc;
 716                         else eni_dev->slow = vcc;
 717                         eni_dev->last_slow = vcc;
 718                 }
 719 putting++;
 720                 ENI_VCC(vcc)->servicing++;
 721         }
 722 }
 723
 724
 725 static void dequeue_rx(struct atm_dev *dev)
 726 {
 727         struct eni_dev *eni_dev;
 728         struct eni_vcc *eni_vcc;
 729         struct atm_vcc *vcc;
 730         struct sk_buff *skb;
 731         void __iomem *vci_dsc;
 732         int first;
 733
 734         eni_dev = ENI_DEV(dev);
 735         first = 1;
 736         while (1) {
 737                 skb = skb_dequeue(&eni_dev->rx_queue);
 738                 if (!skb) {
 739                         if (first) {
 740                                 DPRINTK(DEV_LABEL "(itf %d): RX but not "
 741                                     "rxing\n",dev->number);
 742                                 EVENT("nothing to dequeue\n",0,0);
 743                         }
 744                         break;
 745                 }
 746                 EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb),
 747                     ENI_PRV_POS(skb));
 748 rx_dequeued++;
 749                 vcc = ATM_SKB(skb)->vcc;
 750                 eni_vcc = ENI_VCC(vcc);
 751                 first = 0;
 752                 vci_dsc = eni_dev->vci+vcc->vci*16;
 753                 if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb),
 754                     (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT,
 755                     eni_vcc->words)) {
 756                         EVENT("requeuing\n",0,0);
 757                         skb_queue_head(&eni_dev->rx_queue,skb);
 758                         break;
 759                 }
 760                 eni_vcc->rxing--;
 761                 eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1);
 762                 pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len,
 763                     PCI_DMA_TODEVICE);
 764                 if (!skb->len) dev_kfree_skb_irq(skb);
 765                 else {
 766                         EVENT("pushing (len=%ld)\n",skb->len,0);
 767                         if (vcc->qos.aal == ATM_AAL0)
 768                                 *(unsigned long *) skb->data =
 769                                     ntohl(*(unsigned long *) skb->data);
 770                         memset(skb->cb,0,sizeof(struct eni_skb_prv));
 771                         vcc->push(vcc,skb);
 772                         pushed++;
 773                 }
 774                 atomic_inc(&vcc->stats->rx);
 775         }
 776         wake_up(&eni_dev->rx_wait);
 777 }
 778
 779
 780 static int open_rx_first(struct atm_vcc *vcc)
 781 {
 782         struct eni_dev *eni_dev;
 783         struct eni_vcc *eni_vcc;
 784         unsigned long size;
 785
 786         DPRINTK("open_rx_first\n");
 787         eni_dev = ENI_DEV(vcc->dev);
 788         eni_vcc = ENI_VCC(vcc);
 789         eni_vcc->rx = NULL;
 790         if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0;
 791         size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100;
 792         if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <=
 793             MID_MAX_BUF_SIZE)
 794                 size = MID_MAX_BUF_SIZE;
 795         eni_vcc->recv = eni_alloc_mem(eni_dev,&size);
 796         DPRINTK("rx at 0x%lx\n",eni_vcc->recv);
 797         eni_vcc->words = size >> 2;
 798         if (!eni_vcc->recv) return -ENOBUFS;
 799         eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0;
 800         eni_vcc->descr = 0;
 801         eni_vcc->rx_pos = 0;
 802         eni_vcc->rxing = 0;
 803         eni_vcc->servicing = 0;
 804         eni_vcc->next = ENI_VCC_NOS;
 805         return 0;
 806 }
 807
 808
 809 static int open_rx_second(struct atm_vcc *vcc)
 810 {
 811         void __iomem *here;
 812         struct eni_dev *eni_dev;
 813         struct eni_vcc *eni_vcc;
 814         unsigned long size;
 815         int order;
 816
 817         DPRINTK("open_rx_second\n");
 818         eni_dev = ENI_DEV(vcc->dev);
 819         eni_vcc = ENI_VCC(vcc);
 820         if (!eni_vcc->rx) return 0;
 821         /* set up VCI descriptor */
 822         here = eni_dev->vci+vcc->vci*16;
 823         DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4);
 824         size = eni_vcc->words >> 8;
 825         for (order = -1; size; order++) size >>= 1;
 826         writel(0,here+4); /* descr, read = 0 */
 827         writel(0,here+8); /* write, state, count = 0 */
 828         if (eni_dev->rx_map[vcc->vci])
 829                 printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already "
 830                     "in use\n",vcc->dev->number,vcc->vci);
 831         eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */
 832         writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) <<
 833             MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE |
 834             (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) <<
 835             MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here);
 836         return 0;
 837 }
 838
 839
 840 static void close_rx(struct atm_vcc *vcc)
 841 {
 842         DECLARE_WAITQUEUE(wait,current);
 843         void __iomem *here;
 844         struct eni_dev *eni_dev;
 845         struct eni_vcc *eni_vcc;
 846
 847         eni_vcc = ENI_VCC(vcc);
 848         if (!eni_vcc->rx) return;
 849         eni_dev = ENI_DEV(vcc->dev);
 850         if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) {
 851                 here = eni_dev->vci+vcc->vci*16;
 852                 /* block receiver */
 853                 writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH <<
 854                     MID_VCI_MODE_SHIFT),here);
 855                 /* wait for receiver to become idle */
 856                 udelay(27);
 857                 /* discard pending cell */
 858                 writel(readl(here) & ~MID_VCI_IN_SERVICE,here);
 859                 /* don't accept any new ones */
 860                 eni_dev->rx_map[vcc->vci] = NULL;
 861                 /* wait for RX queue to drain */
 862                 DPRINTK("eni_close: waiting for RX ...\n");
 863                 EVENT("RX closing\n",0,0);
 864                 add_wait_queue(&eni_dev->rx_wait,&wait);
 865                 set_current_state(TASK_UNINTERRUPTIBLE);
 866                 barrier();
 867                 for (;;) {
 868                         /* transition service->rx: rxing++, servicing-- */
 869                         if (!eni_vcc->servicing) {
 870                                 barrier();
 871                                 if (!eni_vcc->rxing) break;
 872                         }
 873                         EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing,
 874                             eni_vcc->servicing);
 875                         printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing,
 876                             eni_vcc->rxing);
 877                         schedule();
 878                         set_current_state(TASK_UNINTERRUPTIBLE);
 879                 }
 880                 for (;;) {
 881                         int at_end;
 882                         u32 tmp;
 883
 884                         tasklet_disable(&eni_dev->task);
 885                         tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ;
 886                         at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT;
 887                         tasklet_enable(&eni_dev->task);
 888                         if (at_end) break;
 889                         EVENT("drain discard (host 0x%lx, nic 0x%lx)\n",
 890                             eni_vcc->rx_pos,tmp);
 891                         printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n",
 892                             eni_vcc->rx_pos,tmp);
 893                         schedule();
 894                         set_current_state(TASK_UNINTERRUPTIBLE);
 895                 }
 896                 set_current_state(TASK_RUNNING);
 897                 remove_wait_queue(&eni_dev->rx_wait,&wait);
 898         }
 899         eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2);
 900         eni_vcc->rx = NULL;
 901 }
 902
 903
 904 static int start_rx(struct atm_dev *dev)
 905 {
 906         struct eni_dev *eni_dev;
 907
 908         eni_dev = ENI_DEV(dev);
 909         eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL);
 910         if (!eni_dev->rx_map) {
 911                 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
 912                     dev->number);
 913                 free_page((unsigned long) eni_dev->free_list);
 914                 return -ENOMEM;
 915         }
 916         memset(eni_dev->rx_map,0,PAGE_SIZE);
 917         eni_dev->rx_mult = DEFAULT_RX_MULT;
 918         eni_dev->fast = eni_dev->last_fast = NULL;
 919         eni_dev->slow = eni_dev->last_slow = NULL;
 920         init_waitqueue_head(&eni_dev->rx_wait);
 921         skb_queue_head_init(&eni_dev->rx_queue);
 922         eni_dev->serv_read = eni_in(MID_SERV_WRITE);
 923         eni_out(0,MID_DMA_WR_RX);
 924         return 0;
 925 }
 926
 927
 928 /*----------------------------------- TX ------------------------------------*/
 929
 930
 931 enum enq_res { enq_ok,enq_next,enq_jam };
 932
 933
 934 static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr,
 935     u32 size)
 936 {
 937         u32 init,words;
 938
 939         DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size);
 940         EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size);
 941 #if 0 /* don't complain anymore */
 942         if (paddr & 3)
 943                 printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr);
 944         if (size & 3)
 945                 printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size);
 946 #endif
 947         if (paddr & 3) {
 948                 init = 4-(paddr & 3);
 949                 if (init > size || size < 7) init = size;
 950                 DPRINTK("put_dma: %lx DMA: %d/%d bytes\n",
 951                     (unsigned long) paddr,init,size);
 952                 dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) |
 953                     (chan << MID_DMA_CHAN_SHIFT);
 954                 dma[(*j)++] = paddr;
 955                 paddr += init;
 956                 size -= init;
 957         }
 958         words = size >> 2;
 959         size &= 3;
 960         if (words && (paddr & 31)) {
 961                 init = 8-((paddr & 31) >> 2);
 962                 if (init > words) init = words;
 963                 DPRINTK("put_dma: %lx DMA: %d/%d words\n",
 964                     (unsigned long) paddr,init,words);
 965                 dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
 966                     (chan << MID_DMA_CHAN_SHIFT);
 967                 dma[(*j)++] = paddr;
 968                 paddr += init << 2;
 969                 words -= init;
 970         }
 971 #ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */
 972         if (words & ~15) {
 973                 DPRINTK("put_dma: %lx DMA: %d*16/%d words\n",
 974                     (unsigned long) paddr,words >> 4,words);
 975                 dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT)
 976                     | (chan << MID_DMA_CHAN_SHIFT);
 977                 dma[(*j)++] = paddr;
 978                 paddr += (words & ~15) << 2;
 979                 words &= 15;
 980         }
 981 #endif
 982 #ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */
 983         if (words & ~7) {
 984                 DPRINTK("put_dma: %lx DMA: %d*8/%d words\n",
 985                     (unsigned long) paddr,words >> 3,words);
 986                 dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT)
 987                     | (chan << MID_DMA_CHAN_SHIFT);
 988                 dma[(*j)++] = paddr;
 989                 paddr += (words & ~7) << 2;
 990                 words &= 7;
 991         }
 992 #endif
 993 #ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */
 994         if (words & ~3) {
 995                 DPRINTK("put_dma: %lx DMA: %d*4/%d words\n",
 996                     (unsigned long) paddr,words >> 2,words);
 997                 dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT)
 998                     | (chan << MID_DMA_CHAN_SHIFT);
 999                 dma[(*j)++] = paddr;
1000                 paddr += (words & ~3) << 2;
1001                 words &= 3;
1002         }
1003 #endif
1004 #ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */
1005         if (words & ~1) {
1006                 DPRINTK("put_dma: %lx DMA: %d*2/%d words\n",
1007                     (unsigned long) paddr,words >> 1,words);
1008                 dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT)
1009                     | (chan << MID_DMA_CHAN_SHIFT);
1010                 dma[(*j)++] = paddr;
1011                 paddr += (words & ~1) << 2;
1012                 words &= 1;
1013         }
1014 #endif
1015         if (words) {
1016                 DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr,
1017                     words);
1018                 dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) |
1019                     (chan << MID_DMA_CHAN_SHIFT);
1020                 dma[(*j)++] = paddr;
1021                 paddr += words << 2;
1022         }
1023         if (size) {
1024                 DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr,
1025                     size);
1026                 dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) |
1027                     (chan << MID_DMA_CHAN_SHIFT);
1028                 dma[(*j)++] = paddr;
1029         }
1030 }
1031
1032
1033 static enum enq_res do_tx(struct sk_buff *skb)
1034 {
1035         struct atm_vcc *vcc;
1036         struct eni_dev *eni_dev;
1037         struct eni_vcc *eni_vcc;
1038         struct eni_tx *tx;
1039         dma_addr_t paddr;
1040         u32 dma_rd,dma_wr;
1041         u32 size; /* in words */
1042         int aal5,dma_size,i,j;
1043
1044         DPRINTK(">do_tx\n");
1045         NULLCHECK(skb);
1046         EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len);
1047         vcc = ATM_SKB(skb)->vcc;
1048         NULLCHECK(vcc);
1049         eni_dev = ENI_DEV(vcc->dev);
1050         NULLCHECK(eni_dev);
1051         eni_vcc = ENI_VCC(vcc);
1052         tx = eni_vcc->tx;
1053         NULLCHECK(tx);
1054 #if 0 /* Enable this for testing with the "align" program */
1055         {
1056                 unsigned int hack = *((char *) skb->data)-'0';
1057
1058                 if (hack < 8) {
1059                         skb->data += hack;
1060                         skb->len -= hack;
1061                 }
1062         }
1063 #endif
1064 #if 0 /* should work now */
1065         if ((unsigned long) skb->data & 3)
1066                 printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned "
1067                     "TX data\n",vcc->dev->number,vcc->vci);
1068 #endif
1069         /*
1070          * Potential future IP speedup: make hard_header big enough to put
1071          * segmentation descriptor directly into PDU. Saves: 4 slave writes,
1072          * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-)
1073          */
1074
1075         aal5 = vcc->qos.aal == ATM_AAL5;
1076         /* check space in buffer */
1077         if (!aal5)
1078                 size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE;
1079                         /* cell without HEC plus segmentation header (includes
1080                            four-byte cell header) */
1081         else {
1082                 size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1;
1083                         /* add AAL5 trailer */
1084                 size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE;
1085                                                 /* add segmentation header */
1086         }
1087         /*
1088          * Can I move tx_pos by size bytes without getting closer than TX_GAP
1089          * to the read pointer ? TX_GAP means to leave some space for what
1090          * the manual calls "too close".
1091          */
1092         if (!NEPMOK(tx->tx_pos,size+TX_GAP,
1093             eni_in(MID_TX_RDPTR(tx->index)),tx->words)) {
1094                 DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n",
1095                     vcc->dev->number,size);
1096                 return enq_next;
1097         }
1098         /* check DMA */
1099         dma_wr = eni_in(MID_DMA_WR_TX);
1100         dma_rd = eni_in(MID_DMA_RD_TX);
1101         dma_size = 3; /* JK for descriptor and final fill, plus final size
1102                          mis-alignment fix */
1103 DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags);
1104         if (!skb_shinfo(skb)->nr_frags) dma_size += 5;
1105         else dma_size += 5*(skb_shinfo(skb)->nr_frags+1);
1106         if (dma_size > TX_DMA_BUF) {
1107                 printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries "
1108                     "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF);
1109         }
1110         DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos);
1111         if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) <
1112              dma_size) {
1113                 printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n",
1114                     vcc->dev->number);
1115                 return enq_jam;
1116         }
1117         paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len,
1118             PCI_DMA_TODEVICE);
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->len - skb->data_len);
1136                         else
1137                                 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1138                                     skb_shinfo(skb)->frags[i].page + skb_shinfo(skb)->frags[i].page_offset,
1139                                     skb_shinfo(skb)->frags[i].size);
1140         }
1141         if (skb->len & 3)
1142                 put_dma(tx->index,eni_dev->dma,&j,zeroes,4-(skb->len & 3));
1143         /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */
1144         eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) <<
1145              MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1146              MID_DMA_END | MID_DT_JK;
1147         j++;
1148         DPRINTK("DMA at end: %d\n",j);
1149         /* store frame */
1150         writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) |
1151             (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) |
1152             (tx->resolution << MID_SEG_RATE_SHIFT) |
1153             (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4);
1154 /*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/
1155         writel((vcc->vci << MID_SEG_VCI_SHIFT) |
1156             (aal5 ? 0 : (skb->data[3] & 0xf)) |
1157             (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0),
1158             tx->send+((tx->tx_pos+1) & (tx->words-1))*4);
1159         DPRINTK("size: %d, len:%d\n",size,skb->len);
1160         if (aal5)
1161                 writel(skb->len,tx->send+
1162                     ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4);
1163         j = j >> 1;
1164         for (i = 0; i < j; i++) {
1165                 writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8);
1166                 writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4);
1167                 dma_wr = (dma_wr+1) & (NR_DMA_TX-1);
1168         }
1169         ENI_PRV_POS(skb) = tx->tx_pos;
1170         ENI_PRV_SIZE(skb) = size;
1171         ENI_VCC(vcc)->txing += size;
1172         tx->tx_pos = (tx->tx_pos+size) & (tx->words-1);
1173         DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos);
1174         eni_out(dma_wr,MID_DMA_WR_TX);
1175         skb_queue_tail(&eni_dev->tx_queue,skb);
1176 queued++;
1177         return enq_ok;
1178 }
1179
1180
1181 static void poll_tx(struct atm_dev *dev)
1182 {
1183         struct eni_tx *tx;
1184         struct sk_buff *skb;
1185         enum enq_res res;
1186         int i;
1187
1188         DPRINTK(">poll_tx\n");
1189         for (i = NR_CHAN-1; i >= 0; i--) {
1190                 tx = &ENI_DEV(dev)->tx[i];
1191                 if (tx->send)
1192                         while ((skb = skb_dequeue(&tx->backlog))) {
1193                                 res = do_tx(skb);
1194                                 if (res == enq_ok) continue;
1195                                 DPRINTK("re-queuing TX PDU\n");
1196                                 skb_queue_head(&tx->backlog,skb);
1197 requeued++;
1198                                 if (res == enq_jam) return;
1199                                 break;
1200                         }
1201         }
1202 }
1203
1204
1205 static void dequeue_tx(struct atm_dev *dev)
1206 {
1207         struct eni_dev *eni_dev;
1208         struct atm_vcc *vcc;
1209         struct sk_buff *skb;
1210         struct eni_tx *tx;
1211
1212         NULLCHECK(dev);
1213         eni_dev = ENI_DEV(dev);
1214         NULLCHECK(eni_dev);
1215         while ((skb = skb_dequeue(&eni_dev->tx_queue))) {
1216                 vcc = ATM_SKB(skb)->vcc;
1217                 NULLCHECK(vcc);
1218                 tx = ENI_VCC(vcc)->tx;
1219                 NULLCHECK(ENI_VCC(vcc)->tx);
1220                 DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb),
1221                     (unsigned) eni_in(MID_TX_DESCRSTART(tx->index)));
1222                 if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) ==
1223                     eni_in(MID_TX_DESCRSTART(tx->index))) {
1224                         skb_queue_head(&eni_dev->tx_queue,skb);
1225                         break;
1226                 }
1227                 ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb);
1228                 pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len,
1229                     PCI_DMA_TODEVICE);
1230                 if (vcc->pop) vcc->pop(vcc,skb);
1231                 else dev_kfree_skb_irq(skb);
1232                 atomic_inc(&vcc->stats->tx);
1233                 wake_up(&eni_dev->tx_wait);
1234 dma_complete++;
1235         }
1236 }
1237
1238
1239 static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr)
1240 {
1241         int i;
1242
1243         for (i = !ubr; i < NR_CHAN; i++)
1244                 if (!eni_dev->tx[i].send) return eni_dev->tx+i;
1245         return NULL;
1246 }
1247
1248
1249 static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre,
1250     int *res,int unlimited)
1251 {
1252         static const int pre_div[] = { 4,16,128,2048 };
1253             /* 2^(((x+2)^2-(x+2))/2+1) */
1254
1255         if (unlimited) *pre = *res = 0;
1256         else {
1257                 if (*pcr > 0) {
1258                         int div;
1259
1260                         for (*pre = 0; *pre < 3; (*pre)++)
1261                                 if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break;
1262                         div = pre_div[*pre]**pcr;
1263                         DPRINTK("min div %d\n",div);
1264                         *res = TS_CLOCK/div-1;
1265                 }
1266                 else {
1267                         int div;
1268
1269                         if (!*pcr) *pcr = eni_dev->tx_bw+reserved;
1270                         for (*pre = 3; *pre >= 0; (*pre)--)
1271                                 if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break;
1272                         if (*pre < 3) (*pre)++; /* else fail later */
1273                         div = pre_div[*pre]*-*pcr;
1274                         DPRINTK("max div %d\n",div);
1275                         *res = (TS_CLOCK+div-1)/div-1;
1276                 }
1277                 if (*res < 0) *res = 0;
1278                 if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE;
1279         }
1280         *pcr = TS_CLOCK/pre_div[*pre]/(*res+1);
1281         DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res);
1282         return 0;
1283 }
1284
1285
1286 static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp,
1287     int set_rsv,int set_shp)
1288 {
1289         struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1290         struct eni_vcc *eni_vcc = ENI_VCC(vcc);
1291         struct eni_tx *tx;
1292         unsigned long size;
1293         void __iomem *mem;
1294         int rate,ubr,unlimited,new_tx;
1295         int pre,res,order;
1296         int error;
1297
1298         rate = atm_pcr_goal(txtp);
1299         ubr = txtp->traffic_class == ATM_UBR;
1300         unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR ||
1301             rate >= ATM_OC3_PCR);
1302         if (!unlimited) {
1303                 size = txtp->max_sdu*eni_dev->tx_mult/100;
1304                 if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <=
1305                     MID_MAX_BUF_SIZE)
1306                         size = MID_MAX_BUF_SIZE;
1307         }
1308         else {
1309                 if (eni_dev->ubr) {
1310                         eni_vcc->tx = eni_dev->ubr;
1311                         txtp->pcr = ATM_OC3_PCR;
1312                         return 0;
1313                 }
1314                 size = UBR_BUFFER;
1315         }
1316         new_tx = !eni_vcc->tx;
1317         mem = NULL; /* for gcc */
1318         if (!new_tx) tx = eni_vcc->tx;
1319         else {
1320                 mem = eni_alloc_mem(eni_dev,&size);
1321                 if (!mem) return -ENOBUFS;
1322                 tx = alloc_tx(eni_dev,unlimited);
1323                 if (!tx) {
1324                         eni_free_mem(eni_dev,mem,size);
1325                         return -EBUSY;
1326                 }
1327                 DPRINTK("got chan %d\n",tx->index);
1328                 tx->reserved = tx->shaping = 0;
1329                 tx->send = mem;
1330                 tx->words = size >> 2;
1331                 skb_queue_head_init(&tx->backlog);
1332                 for (order = 0; size > (1 << (order+10)); order++);
1333                 eni_out((order << MID_SIZE_SHIFT) |
1334                     ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)),
1335                     MID_TX_PLACE(tx->index));
1336                 tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) &
1337                     MID_DESCR_START;
1338         }
1339         error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited);
1340         if (!error  && txtp->min_pcr > rate) error = -EINVAL;
1341         if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR &&
1342             txtp->max_pcr < rate) error = -EINVAL;
1343         if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved)
1344                 error = -EINVAL;
1345         if (!error && set_rsv && !set_shp && rate < tx->shaping)
1346                 error = -EINVAL;
1347         if (!error && !set_rsv && rate > tx->reserved && !ubr)
1348                 error = -EINVAL;
1349         if (error) {
1350                 if (new_tx) {
1351                         tx->send = NULL;
1352                         eni_free_mem(eni_dev,mem,size);
1353                 }
1354                 return error;
1355         }
1356         txtp->pcr = rate;
1357         if (set_rsv && !ubr) {
1358                 eni_dev->tx_bw += tx->reserved;
1359                 tx->reserved = rate;
1360                 eni_dev->tx_bw -= rate;
1361         }
1362         if (set_shp || (unlimited && new_tx)) {
1363                 if (unlimited && new_tx) eni_dev->ubr = tx;
1364                 tx->prescaler = pre;
1365                 tx->resolution = res;
1366                 tx->shaping = rate;
1367         }
1368         if (set_shp) eni_vcc->tx = tx;
1369         DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping);
1370         return 0;
1371 }
1372
1373
1374 static int open_tx_first(struct atm_vcc *vcc)
1375 {
1376         ENI_VCC(vcc)->tx = NULL;
1377         if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0;
1378         ENI_VCC(vcc)->txing = 0;
1379         return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1);
1380 }
1381
1382
1383 static int open_tx_second(struct atm_vcc *vcc)
1384 {
1385         return 0; /* nothing to do */
1386 }
1387
1388
1389 static void close_tx(struct atm_vcc *vcc)
1390 {
1391         DECLARE_WAITQUEUE(wait,current);
1392         struct eni_dev *eni_dev;
1393         struct eni_vcc *eni_vcc;
1394
1395         eni_vcc = ENI_VCC(vcc);
1396         if (!eni_vcc->tx) return;
1397         eni_dev = ENI_DEV(vcc->dev);
1398         /* wait for TX queue to drain */
1399         DPRINTK("eni_close: waiting for TX ...\n");
1400         add_wait_queue(&eni_dev->tx_wait,&wait);
1401         set_current_state(TASK_UNINTERRUPTIBLE);
1402         for (;;) {
1403                 int txing;
1404
1405                 tasklet_disable(&eni_dev->task);
1406                 txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing;
1407                 tasklet_enable(&eni_dev->task);
1408                 if (!txing) break;
1409                 DPRINTK("%d TX left\n",eni_vcc->txing);
1410                 schedule();
1411                 set_current_state(TASK_UNINTERRUPTIBLE);
1412         }
1413         set_current_state(TASK_RUNNING);
1414         remove_wait_queue(&eni_dev->tx_wait,&wait);
1415         if (eni_vcc->tx != eni_dev->ubr) {
1416                 /*
1417                  * Looping a few times in here is probably far cheaper than
1418                  * keeping track of TX completions all the time, so let's poll
1419                  * a bit ...
1420                  */
1421                 while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) !=
1422                     eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index)))
1423                         schedule();
1424                 eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2);
1425                 eni_vcc->tx->send = NULL;
1426                 eni_dev->tx_bw += eni_vcc->tx->reserved;
1427         }
1428         eni_vcc->tx = NULL;
1429 }
1430
1431
1432 static int start_tx(struct atm_dev *dev)
1433 {
1434         struct eni_dev *eni_dev;
1435         int i;
1436
1437         eni_dev = ENI_DEV(dev);
1438         eni_dev->lost = 0;
1439         eni_dev->tx_bw = ATM_OC3_PCR;
1440         eni_dev->tx_mult = DEFAULT_TX_MULT;
1441         init_waitqueue_head(&eni_dev->tx_wait);
1442         eni_dev->ubr = NULL;
1443         skb_queue_head_init(&eni_dev->tx_queue);
1444         eni_out(0,MID_DMA_WR_TX);
1445         for (i = 0; i < NR_CHAN; i++) {
1446                 eni_dev->tx[i].send = NULL;
1447                 eni_dev->tx[i].index = i;
1448         }
1449         return 0;
1450 }
1451
1452
1453 /*--------------------------------- common ----------------------------------*/
1454
1455
1456 #if 0 /* may become useful again when tuning things */
1457
1458 static void foo(void)
1459 {
1460 printk(KERN_INFO
1461   "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n"
1462   "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n",
1463   tx_complete,dma_complete,queued,requeued,submitted,backlogged,
1464   rx_enqueued,rx_dequeued,putting,pushed);
1465 if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost);
1466 }
1467
1468 #endif
1469
1470
1471 static void bug_int(struct atm_dev *dev,unsigned long reason)
1472 {
1473         struct eni_dev *eni_dev;
1474
1475         DPRINTK(">bug_int\n");
1476         eni_dev = ENI_DEV(dev);
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,struct pt_regs *regs)
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 const char *media_name[] __devinitdata = {
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 __devinit 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 __devinit 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 __devinit 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         unsigned char revision;
1710         int error,i,last;
1711
1712         DPRINTK(">eni_init\n");
1713         dev->ci_range.vpi_bits = 0;
1714         dev->ci_range.vci_bits = NR_VCI_LD;
1715         dev->link_rate = ATM_OC3_PCR;
1716         eni_dev = ENI_DEV(dev);
1717         pci_dev = eni_dev->pci_dev;
1718         real_base = pci_resource_start(pci_dev, 0);
1719         eni_dev->irq = pci_dev->irq;
1720         error = pci_read_config_byte(pci_dev,PCI_REVISION_ID,&revision);
1721         if (error) {
1722                 printk(KERN_ERR DEV_LABEL "(itf %d): init error 0x%02x\n",
1723                     dev->number,error);
1724                 return -EINVAL;
1725         }
1726         if ((error = pci_write_config_word(pci_dev,PCI_COMMAND,
1727             PCI_COMMAND_MEMORY |
1728             (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1729                 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory "
1730                     "(0x%02x)\n",dev->number,error);
1731                 return -EIO;
1732         }
1733         printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,",
1734             dev->number,revision,real_base,eni_dev->irq);
1735         if (!(base = ioremap_nocache(real_base,MAP_MAX_SIZE))) {
1736                 printk("\n");
1737                 printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page "
1738                     "mapping\n",dev->number);
1739                 return error;
1740         }
1741         eni_dev->base_diff = real_base - (unsigned long) base;
1742         /* id may not be present in ASIC Tonga boards - check this @@@ */
1743         if (!eni_dev->asic) {
1744                 eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom));
1745                 if (readl(&eprom->magic) != ENI155_MAGIC) {
1746                         printk("\n");
1747                         printk(KERN_ERR KERN_ERR DEV_LABEL "(itf %d): bad "
1748                             "magic - expected 0x%x, got 0x%x\n",dev->number,
1749                             ENI155_MAGIC,(unsigned) readl(&eprom->magic));
1750                         return -EINVAL;
1751                 }
1752         }
1753         eni_dev->phy = base+PHY_BASE;
1754         eni_dev->reg = base+REG_BASE;
1755         eni_dev->ram = base+RAM_BASE;
1756         last = MAP_MAX_SIZE-RAM_BASE;
1757         for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) {
1758                 writel(0x55555555,eni_dev->ram+i);
1759                 if (readl(eni_dev->ram+i) != 0x55555555) last = i;
1760                 else {
1761                         writel(0xAAAAAAAA,eni_dev->ram+i);
1762                         if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i;
1763                         else writel(i,eni_dev->ram+i);
1764                 }
1765         }
1766         for (i = 0; i < last; i += RAM_INCREMENT)
1767                 if (readl(eni_dev->ram+i) != i) break;
1768         eni_dev->mem = i;
1769         memset_io(eni_dev->ram,0,eni_dev->mem);
1770         /* TODO: should shrink allocation now */
1771         printk("mem=%dkB (",eni_dev->mem >> 10);
1772         /* TODO: check for non-SUNI, check for TAXI ? */
1773         if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) {
1774                 printk(")\n");
1775                 printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n",
1776                     dev->number,(unsigned) eni_in(MID_RES_ID_MCON));
1777                 return -EINVAL;
1778         }
1779         error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base);
1780         if (error) return error;
1781         for (i = 0; i < ESI_LEN; i++)
1782                 printk("%s%02X",i ? "-" : "",dev->esi[i]);
1783         printk(")\n");
1784         printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number,
1785             eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA",
1786             media_name[eni_in(MID_RES_ID_MCON) & DAUGTHER_ID]);
1787         return suni_init(dev);
1788 }
1789
1790
1791 static int __devinit eni_start(struct atm_dev *dev)
1792 {
1793         struct eni_dev *eni_dev;
1794
1795         void __iomem *buf;
1796         unsigned long buffer_mem;
1797         int error;
1798
1799         DPRINTK(">eni_start\n");
1800         eni_dev = ENI_DEV(dev);
1801         if (request_irq(eni_dev->irq,&eni_int,SA_SHIRQ,DEV_LABEL,dev)) {
1802                 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
1803                     dev->number,eni_dev->irq);
1804                 error = -EAGAIN;
1805                 goto out;
1806         }
1807         pci_set_master(eni_dev->pci_dev);
1808         if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND,
1809             PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
1810             (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1811                 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+"
1812                     "master (0x%02x)\n",dev->number,error);
1813                 goto free_irq;
1814         }
1815         if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,
1816             END_SWAP_DMA))) {
1817                 printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap "
1818                     "(0x%02x)\n",dev->number,error);
1819                 goto free_irq;
1820         }
1821         /* determine addresses of internal tables */
1822         eni_dev->vci = eni_dev->ram;
1823         eni_dev->rx_dma = eni_dev->ram+NR_VCI*16;
1824         eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8;
1825         eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8;
1826         buf = eni_dev->service+NR_SERVICE*4;
1827         DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n",
1828              eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma,
1829              eni_dev->service,buf);
1830         spin_lock_init(&eni_dev->lock);
1831         tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev);
1832         eni_dev->events = 0;
1833         /* initialize memory management */
1834         buffer_mem = eni_dev->mem - (buf - eni_dev->ram);
1835         eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2;
1836         eni_dev->free_list = (struct eni_free *) kmalloc(
1837             sizeof(struct eni_free)*(eni_dev->free_list_size+1),GFP_KERNEL);
1838         if (!eni_dev->free_list) {
1839                 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
1840                     dev->number);
1841                 error = -ENOMEM;
1842                 goto free_irq;
1843         }
1844         eni_dev->free_len = 0;
1845         eni_put_free(eni_dev,buf,buffer_mem);
1846         memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */
1847         /*
1848          * byte_addr  free (k)
1849          * 0x00000000     512  VCI table
1850          * 0x00004000     496  RX DMA
1851          * 0x00005000     492  TX DMA
1852          * 0x00006000     488  service list
1853          * 0x00007000     484  buffers
1854          * 0x00080000       0  end (512kB)
1855          */
1856         eni_out(0xffffffff,MID_IE);
1857         error = start_tx(dev);
1858         if (error) goto free_list;
1859         error = start_rx(dev);
1860         if (error) goto free_list;
1861         error = dev->phy->start(dev);
1862         if (error) goto free_list;
1863         eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) |
1864             MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE,
1865             MID_MC_S);
1866             /* Tonga uses SBus INTReq1 */
1867         (void) eni_in(MID_ISA); /* clear Midway interrupts */
1868         return 0;
1869
1870 free_list:
1871         kfree(eni_dev->free_list);
1872
1873 free_irq:
1874         free_irq(eni_dev->irq, eni_dev);
1875
1876 out:
1877         return error;
1878 }
1879
1880
1881 static void eni_close(struct atm_vcc *vcc)
1882 {
1883         DPRINTK(">eni_close\n");
1884         if (!ENI_VCC(vcc)) return;
1885         clear_bit(ATM_VF_READY,&vcc->flags);
1886         close_rx(vcc);
1887         close_tx(vcc);
1888         DPRINTK("eni_close: done waiting\n");
1889         /* deallocate memory */
1890         kfree(ENI_VCC(vcc));
1891         vcc->dev_data = NULL;
1892         clear_bit(ATM_VF_ADDR,&vcc->flags);
1893         /*foo();*/
1894 }
1895
1896
1897 static int eni_open(struct atm_vcc *vcc)
1898 {
1899         struct eni_dev *eni_dev;
1900         struct eni_vcc *eni_vcc;
1901         int error;
1902         short vpi = vcc->vpi;
1903         int vci = vcc->vci;
1904
1905         DPRINTK(">eni_open\n");
1906         EVENT("eni_open\n",0,0);
1907         if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1908                 vcc->dev_data = NULL;
1909         eni_dev = ENI_DEV(vcc->dev);
1910         if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
1911                 set_bit(ATM_VF_ADDR,&vcc->flags);
1912         if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5)
1913                 return -EINVAL;
1914         DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi,
1915             vcc->vci);
1916         if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
1917                 eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL);
1918                 if (!eni_vcc) return -ENOMEM;
1919                 vcc->dev_data = eni_vcc;
1920                 eni_vcc->tx = NULL; /* for eni_close after open_rx */
1921                 if ((error = open_rx_first(vcc))) {
1922                         eni_close(vcc);
1923                         return error;
1924                 }
1925                 if ((error = open_tx_first(vcc))) {
1926                         eni_close(vcc);
1927                         return error;
1928                 }
1929         }
1930         if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0;
1931         if ((error = open_rx_second(vcc))) {
1932                 eni_close(vcc);
1933                 return error;
1934         }
1935         if ((error = open_tx_second(vcc))) {
1936                 eni_close(vcc);
1937                 return error;
1938         }
1939         set_bit(ATM_VF_READY,&vcc->flags);
1940         /* should power down SUNI while !ref_count @@@ */
1941         return 0;
1942 }
1943
1944
1945 static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs)
1946 {
1947         struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1948         struct eni_tx *tx = ENI_VCC(vcc)->tx;
1949         struct sk_buff *skb;
1950         int error,rate,rsv,shp;
1951
1952         if (qos->txtp.traffic_class == ATM_NONE) return 0;
1953         if (tx == eni_dev->ubr) return -EBADFD;
1954         rate = atm_pcr_goal(&qos->txtp);
1955         if (rate < 0) rate = -rate;
1956         rsv = shp = 0;
1957         if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1;
1958         if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1;
1959         if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1;
1960         if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1;
1961         if (!rsv && !shp) return 0;
1962         error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp);
1963         if (error) return error;
1964         if (shp && !(flgs & ATM_MF_IMMED)) return 0;
1965         /*
1966          * Walk through the send buffer and patch the rate information in all
1967          * segmentation buffer descriptors of this VCC.
1968          */
1969         tasklet_disable(&eni_dev->task);
1970         skb_queue_walk(&eni_dev->tx_queue, skb) {
1971                 void __iomem *dsc;
1972
1973                 if (ATM_SKB(skb)->vcc != vcc) continue;
1974                 dsc = tx->send+ENI_PRV_POS(skb)*4;
1975                 writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) |
1976                     (tx->prescaler << MID_SEG_PR_SHIFT) |
1977                     (tx->resolution << MID_SEG_RATE_SHIFT), dsc);
1978         }
1979         tasklet_enable(&eni_dev->task);
1980         return 0;
1981 }
1982
1983
1984 static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
1985 {
1986         struct eni_dev *eni_dev = ENI_DEV(dev);
1987
1988         if (cmd == ENI_MEMDUMP) {
1989                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1990                 printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d "
1991                     "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number);
1992                 dump(dev);
1993                 return 0;
1994         }
1995         if (cmd == ENI_SETMULT) {
1996                 struct eni_multipliers mult;
1997
1998                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1999                 if (copy_from_user(&mult, arg,
2000                     sizeof(struct eni_multipliers)))
2001                         return -EFAULT;
2002                 if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) ||
2003                     mult.tx > 65536 || mult.rx > 65536)
2004                         return -EINVAL;
2005                 if (mult.tx) eni_dev->tx_mult = mult.tx;
2006                 if (mult.rx) eni_dev->rx_mult = mult.rx;
2007                 return 0;
2008         }
2009         if (cmd == ATM_SETCIRANGE) {
2010                 struct atm_cirange ci;
2011
2012                 if (copy_from_user(&ci, arg,sizeof(struct atm_cirange)))
2013                         return -EFAULT;
2014                 if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) &&
2015                     (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX))
2016                     return 0;
2017                 return -EINVAL;
2018         }
2019         if (!dev->phy->ioctl) return -ENOIOCTLCMD;
2020         return dev->phy->ioctl(dev,cmd,arg);
2021 }
2022
2023
2024 static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname,
2025     void __user *optval,int optlen)
2026 {
2027         return -EINVAL;
2028 }
2029
2030
2031 static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname,
2032     void __user *optval,int optlen)
2033 {
2034         return -EINVAL;
2035 }
2036
2037
2038 static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb)
2039 {
2040         enum enq_res res;
2041
2042         DPRINTK(">eni_send\n");
2043         if (!ENI_VCC(vcc)->tx) {
2044                 if (vcc->pop) vcc->pop(vcc,skb);
2045                 else dev_kfree_skb(skb);
2046                 return -EINVAL;
2047         }
2048         if (!skb) {
2049                 printk(KERN_CRIT "!skb in eni_send ?\n");
2050                 if (vcc->pop) vcc->pop(vcc,skb);
2051                 return -EINVAL;
2052         }
2053         if (vcc->qos.aal == ATM_AAL0) {
2054                 if (skb->len != ATM_CELL_SIZE-1) {
2055                         if (vcc->pop) vcc->pop(vcc,skb);
2056                         else dev_kfree_skb(skb);
2057                         return -EINVAL;
2058                 }
2059                 *(u32 *) skb->data = htonl(*(u32 *) skb->data);
2060         }
2061 submitted++;
2062         ATM_SKB(skb)->vcc = vcc;
2063         tasklet_disable(&ENI_DEV(vcc->dev)->task);
2064         res = do_tx(skb);
2065         tasklet_enable(&ENI_DEV(vcc->dev)->task);
2066         if (res == enq_ok) return 0;
2067         skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb);
2068 backlogged++;
2069         tasklet_schedule(&ENI_DEV(vcc->dev)->task);
2070         return 0;
2071 }
2072
2073 static void eni_phy_put(struct atm_dev *dev,unsigned char value,
2074     unsigned long addr)
2075 {
2076         writel(value,ENI_DEV(dev)->phy+addr*4);
2077 }
2078
2079
2080
2081 static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr)
2082 {
2083         return readl(ENI_DEV(dev)->phy+addr*4);
2084 }
2085
2086
2087 static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page)
2088 {
2089         struct hlist_node *node;
2090         struct sock *s;
2091         static const char *signal[] = { "LOST","unknown","okay" };
2092         struct eni_dev *eni_dev = ENI_DEV(dev);
2093         struct atm_vcc *vcc;
2094         int left,i;
2095
2096         left = *pos;
2097         if (!left)
2098                 return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, "
2099                     "%d cps remaining\n",dev->number,signal[(int) dev->signal],
2100                     eni_dev->mem >> 10,eni_dev->tx_bw);
2101         if (!--left)
2102                 return sprintf(page,"%4sBursts: TX"
2103 #if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \
2104     !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \
2105     !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \
2106     !defined(CONFIG_ATM_ENI_BURST_TX_2W)
2107                     " none"
2108 #endif
2109 #ifdef CONFIG_ATM_ENI_BURST_TX_16W
2110                     " 16W"
2111 #endif
2112 #ifdef CONFIG_ATM_ENI_BURST_TX_8W
2113                     " 8W"
2114 #endif
2115 #ifdef CONFIG_ATM_ENI_BURST_TX_4W
2116                     " 4W"
2117 #endif
2118 #ifdef CONFIG_ATM_ENI_BURST_TX_2W
2119                     " 2W"
2120 #endif
2121                     ", RX"
2122 #if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \
2123     !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \
2124     !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \
2125     !defined(CONFIG_ATM_ENI_BURST_RX_2W)
2126                     " none"
2127 #endif
2128 #ifdef CONFIG_ATM_ENI_BURST_RX_16W
2129                     " 16W"
2130 #endif
2131 #ifdef CONFIG_ATM_ENI_BURST_RX_8W
2132                     " 8W"
2133 #endif
2134 #ifdef CONFIG_ATM_ENI_BURST_RX_4W
2135                     " 4W"
2136 #endif
2137 #ifdef CONFIG_ATM_ENI_BURST_RX_2W
2138                     " 2W"
2139 #endif
2140 #ifndef CONFIG_ATM_ENI_TUNE_BURST
2141                     " (default)"
2142 #endif
2143                     "\n","");
2144         if (!--left)
2145                 return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n",
2146                     "",eni_dev->tx_mult,eni_dev->rx_mult);
2147         for (i = 0; i < NR_CHAN; i++) {
2148                 struct eni_tx *tx = eni_dev->tx+i;
2149
2150                 if (!tx->send) continue;
2151                 if (!--left) {
2152                         return sprintf(page,"tx[%d]:    0x%ld-0x%ld "
2153                             "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i,
2154                             (unsigned long) (tx->send - eni_dev->ram),
2155                             tx->send-eni_dev->ram+tx->words*4-1,tx->words*4,
2156                             tx->reserved,tx->shaping,
2157                             tx == eni_dev->ubr ? " (UBR)" : "");
2158                 }
2159                 if (--left) continue;
2160                 return sprintf(page,"%10sbacklog %u packets\n","",
2161                     skb_queue_len(&tx->backlog));
2162         }
2163         read_lock(&vcc_sklist_lock);
2164         for(i = 0; i < VCC_HTABLE_SIZE; ++i) {
2165                 struct hlist_head *head = &vcc_hash[i];
2166
2167                 sk_for_each(s, node, head) {
2168                         struct eni_vcc *eni_vcc;
2169                         int length;
2170
2171                         vcc = atm_sk(s);
2172                         if (vcc->dev != dev)
2173                                 continue;
2174                         eni_vcc = ENI_VCC(vcc);
2175                         if (--left) continue;
2176                         length = sprintf(page,"vcc %4d: ",vcc->vci);
2177                         if (eni_vcc->rx) {
2178                                 length += sprintf(page+length,"0x%ld-0x%ld "
2179                                     "(%6ld bytes)",
2180                                     (unsigned long) (eni_vcc->recv - eni_dev->ram),
2181                                     eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1,
2182                                     eni_vcc->words*4);
2183                                 if (eni_vcc->tx) length += sprintf(page+length,", ");
2184                         }
2185                         if (eni_vcc->tx)
2186                                 length += sprintf(page+length,"tx[%d], txing %d bytes",
2187                                     eni_vcc->tx->index,eni_vcc->txing);
2188                         page[length] = '\n';
2189                         read_unlock(&vcc_sklist_lock);
2190                         return length+1;
2191                 }
2192         }
2193         read_unlock(&vcc_sklist_lock);
2194         for (i = 0; i < eni_dev->free_len; i++) {
2195                 struct eni_free *fe = eni_dev->free_list+i;
2196                 unsigned long offset;
2197
2198                 if (--left) continue;
2199                 offset = (unsigned long) eni_dev->ram+eni_dev->base_diff;
2200                 return sprintf(page,"free      %p-%p (%6d bytes)\n",
2201                     fe->start-offset,fe->start-offset+(1 << fe->order)-1,
2202                     1 << fe->order);
2203         }
2204         return 0;
2205 }
2206
2207
2208 static const struct atmdev_ops ops = {
2209         .open           = eni_open,
2210         .close          = eni_close,
2211         .ioctl          = eni_ioctl,
2212         .getsockopt     = eni_getsockopt,
2213         .setsockopt     = eni_setsockopt,
2214         .send           = eni_send,
2215         .phy_put        = eni_phy_put,
2216         .phy_get        = eni_phy_get,
2217         .change_qos     = eni_change_qos,
2218         .proc_read      = eni_proc_read
2219 };
2220
2221
2222 static int __devinit eni_init_one(struct pci_dev *pci_dev,
2223     const struct pci_device_id *ent)
2224 {
2225         struct atm_dev *dev;
2226         struct eni_dev *eni_dev;
2227         int error = -ENOMEM;
2228
2229         DPRINTK("eni_init_one\n");
2230
2231         if (pci_enable_device(pci_dev)) {
2232                 error = -EIO;
2233                 goto out0;
2234         }
2235
2236         eni_dev = (struct eni_dev *) kmalloc(sizeof(struct eni_dev),GFP_KERNEL);
2237         if (!eni_dev) goto out0;
2238         if (!cpu_zeroes) {
2239                 cpu_zeroes = pci_alloc_consistent(pci_dev,ENI_ZEROES_SIZE,
2240                     &zeroes);
2241                 if (!cpu_zeroes) goto out1;
2242         }
2243         dev = atm_dev_register(DEV_LABEL,&ops,-1,NULL);
2244         if (!dev) goto out2;
2245         pci_set_drvdata(pci_dev, dev);
2246         eni_dev->pci_dev = pci_dev;
2247         dev->dev_data = eni_dev;
2248         eni_dev->asic = ent->driver_data;
2249         error = eni_do_init(dev);
2250         if (error) goto out3;
2251         error = eni_start(dev);
2252         if (error) goto out3;
2253         eni_dev->more = eni_boards;
2254         eni_boards = dev;
2255         return 0;
2256 out3:
2257         atm_dev_deregister(dev);
2258 out2:
2259         pci_free_consistent(eni_dev->pci_dev,ENI_ZEROES_SIZE,cpu_zeroes,zeroes);
2260         cpu_zeroes = NULL;
2261 out1:
2262         kfree(eni_dev);
2263 out0:
2264         return error;
2265 }
2266
2267
2268 static struct pci_device_id eni_pci_tbl[] = {
2269         { PCI_VENDOR_ID_EF, PCI_DEVICE_ID_EF_ATM_FPGA, PCI_ANY_ID, PCI_ANY_ID,
2270           0, 0, 0 /* FPGA */ },
2271         { PCI_VENDOR_ID_EF, PCI_DEVICE_ID_EF_ATM_ASIC, PCI_ANY_ID, PCI_ANY_ID,
2272           0, 0, 1 /* ASIC */ },
2273         { 0, }
2274 };
2275 MODULE_DEVICE_TABLE(pci,eni_pci_tbl);
2276
2277
2278 static void __devexit eni_remove_one(struct pci_dev *pci_dev)
2279 {
2280         /* grrr */
2281 }
2282
2283
2284 static struct pci_driver eni_driver = {
2285         .name           = DEV_LABEL,
2286         .id_table       = eni_pci_tbl,
2287         .probe          = eni_init_one,
2288         .remove         = __devexit_p(eni_remove_one),
2289 };
2290
2291
2292 static int __init eni_init(void)
2293 {
2294         struct sk_buff *skb; /* dummy for sizeof */
2295
2296         if (sizeof(skb->cb) < sizeof(struct eni_skb_prv)) {
2297                 printk(KERN_ERR "eni_detect: skb->cb is too small (%Zd < %Zd)\n",
2298                     sizeof(skb->cb),sizeof(struct eni_skb_prv));
2299                 return -EIO;
2300         }
2301         return pci_register_driver(&eni_driver);
2302 }
2303
2304
2305 module_init(eni_init);
2306 /* @@@ since exit routine not defined, this module can not be unloaded */
2307
2308 MODULE_LICENSE("GPL");