drivers/atm/eni.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /* drivers/atm/eni.c - Efficient Networks ENI155P device driver */
   3
   4 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
   5
   6
   7 #include <linux/module.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 <linux/slab.h>
  23 #include <asm/io.h>
  24 #include <linux/atomic.h>
  25 #include <linux/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 /*
  35  * TODO:
  36  *
  37  * Show stoppers
  38  *  none
  39  *
  40  * Minor
  41  *  - OAM support
  42  *  - fix bugs listed below
  43  */
  44
  45 /*
  46  * KNOWN BUGS:
  47  *
  48  * - may run into JK-JK bug and deadlock
  49  * - should allocate UBR channel first
  50  * - buffer space allocation algorithm is stupid
  51  *   (RX: should be maxSDU+maxdelay*rate
  52  *    TX: should be maxSDU+min(maxSDU,maxdelay*rate) )
  53  * - doesn't support OAM cells
  54  * - eni_put_free may hang if not putting memory fragments that _complete_
  55  *   2^n block (never happens in real life, though)
  56  */
  57
  58
  59 #if 0
  60 #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
  61 #else
  62 #define DPRINTK(format,args...)
  63 #endif
  64
  65
  66 #ifndef CONFIG_ATM_ENI_TUNE_BURST
  67 #define CONFIG_ATM_ENI_BURST_TX_8W
  68 #define CONFIG_ATM_ENI_BURST_RX_4W
  69 #endif
  70
  71
  72 #ifndef CONFIG_ATM_ENI_DEBUG
  73
  74
  75 #define NULLCHECK(x)
  76
  77 #define EVENT(s,a,b)
  78
  79
  80 static void event_dump(void)
  81 {
  82 }
  83
  84
  85 #else
  86
  87
  88 /*
  89  * NULL pointer checking
  90  */
  91
  92 #define NULLCHECK(x) \
  93         if ((unsigned long) (x) < 0x30) \
  94                 printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x))
  95
  96 /*
  97  * Very extensive activity logging. Greatly improves bug detection speed but
  98  * costs a few Mbps if enabled.
  99  */
 100
 101 #define EV 64
 102
 103 static const char *ev[EV];
 104 static unsigned long ev_a[EV],ev_b[EV];
 105 static int ec = 0;
 106
 107
 108 static void EVENT(const char *s,unsigned long a,unsigned long b)
 109 {
 110         ev[ec] = s;
 111         ev_a[ec] = a;
 112         ev_b[ec] = b;
 113         ec = (ec+1) % EV;
 114 }
 115
 116
 117 static void event_dump(void)
 118 {
 119         int n,i;
 120
 121         for (n = 0; n < EV; n++) {
 122                 i = (ec+n) % EV;
 123                 printk(KERN_NOTICE);
 124                 printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]);
 125         }
 126 }
 127
 128
 129 #endif /* CONFIG_ATM_ENI_DEBUG */
 130
 131
 132 /*
 133  * NExx   must not be equal at end
 134  * EExx   may be equal at end
 135  * xxPJOK verify validity of pointer jumps
 136  * xxPMOK operating on a circular buffer of "c" words
 137  */
 138
 139 #define NEPJOK(a0,a1,b) \
 140     ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1))
 141 #define EEPJOK(a0,a1,b) \
 142     ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1))
 143 #define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b)
 144 #define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b)
 145
 146
 147 static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0,
 148   backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0,
 149   putting = 0;
 150
 151 static struct atm_dev *eni_boards = NULL;
 152
 153 /* Read/write registers on card */
 154 #define eni_in(r)       readl(eni_dev->reg+(r)*4)
 155 #define eni_out(v,r)    writel((v),eni_dev->reg+(r)*4)
 156
 157
 158 /*-------------------------------- utilities --------------------------------*/
 159
 160
 161 static void dump_mem(struct eni_dev *eni_dev)
 162 {
 163         int i;
 164
 165         for (i = 0; i < eni_dev->free_len; i++)
 166                 printk(KERN_DEBUG "  %d: %p %d\n",i,
 167                     eni_dev->free_list[i].start,
 168                     1 << eni_dev->free_list[i].order);
 169 }
 170
 171
 172 static void dump(struct atm_dev *dev)
 173 {
 174         struct eni_dev *eni_dev;
 175
 176         int i;
 177
 178         eni_dev = ENI_DEV(dev);
 179         printk(KERN_NOTICE "Free memory\n");
 180         dump_mem(eni_dev);
 181         printk(KERN_NOTICE "TX buffers\n");
 182         for (i = 0; i < NR_CHAN; i++)
 183                 if (eni_dev->tx[i].send)
 184                         printk(KERN_NOTICE "  TX %d @ %p: %ld\n",i,
 185                             eni_dev->tx[i].send,eni_dev->tx[i].words*4);
 186         printk(KERN_NOTICE "RX buffers\n");
 187         for (i = 0; i < 1024; i++)
 188                 if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx)
 189                         printk(KERN_NOTICE "  RX %d @ %p: %ld\n",i,
 190                             ENI_VCC(eni_dev->rx_map[i])->recv,
 191                             ENI_VCC(eni_dev->rx_map[i])->words*4);
 192         printk(KERN_NOTICE "----\n");
 193 }
 194
 195
 196 static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start,
 197     unsigned long size)
 198 {
 199         struct eni_free *list;
 200         int len,order;
 201
 202         DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size);
 203         start += eni_dev->base_diff;
 204         list = eni_dev->free_list;
 205         len = eni_dev->free_len;
 206         while (size) {
 207                 if (len >= eni_dev->free_list_size) {
 208                         printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n",
 209                             start,size);
 210                         break;
 211                 }
 212                 for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++);
 213                 if (MID_MIN_BUF_SIZE > (1 << order)) {
 214                         printk(KERN_CRIT "eni_put_free: order %d too small\n",
 215                             order);
 216                         break;
 217                 }
 218                 list[len].start = (void __iomem *) start;
 219                 list[len].order = order;
 220                 len++;
 221                 start += 1 << order;
 222                 size -= 1 << order;
 223         }
 224         eni_dev->free_len = len;
 225         /*dump_mem(eni_dev);*/
 226 }
 227
 228
 229 static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size)
 230 {
 231         struct eni_free *list;
 232         void __iomem *start;
 233         int len,i,order,best_order,index;
 234
 235         list = eni_dev->free_list;
 236         len = eni_dev->free_len;
 237         if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE;
 238         if (*size > MID_MAX_BUF_SIZE) return NULL;
 239         for (order = 0; (1 << order) < *size; order++)
 240                 ;
 241         DPRINTK("trying: %ld->%d\n",*size,order);
 242         best_order = 65; /* we don't have more than 2^64 of anything ... */
 243         index = 0; /* silence GCC */
 244         for (i = 0; i < len; i++)
 245                 if (list[i].order == order) {
 246                         best_order = order;
 247                         index = i;
 248                         break;
 249                 }
 250                 else if (best_order > list[i].order && list[i].order > order) {
 251                                 best_order = list[i].order;
 252                                 index = i;
 253                         }
 254         if (best_order == 65) return NULL;
 255         start = list[index].start-eni_dev->base_diff;
 256         list[index] = list[--len];
 257         eni_dev->free_len = len;
 258         *size = 1 << order;
 259         eni_put_free(eni_dev,start+*size,(1 << best_order)-*size);
 260         DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start);
 261         memset_io(start,0,*size);       /* never leak data */
 262         /*dump_mem(eni_dev);*/
 263         return start;
 264 }
 265
 266
 267 static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start,
 268     unsigned long size)
 269 {
 270         struct eni_free *list;
 271         int len,i,order;
 272
 273         start += eni_dev->base_diff;
 274         list = eni_dev->free_list;
 275         len = eni_dev->free_len;
 276         for (order = -1; size; order++) size >>= 1;
 277         DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order);
 278         for (i = 0; i < len; i++)
 279                 if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) &&
 280                     list[i].order == order) {
 281                         DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i,
 282                             list[i].start,start,1 << order,list[i].order,order);
 283                         list[i] = list[--len];
 284                         start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order));
 285                         order++;
 286                         i = -1;
 287                         continue;
 288                 }
 289         if (len >= eni_dev->free_list_size) {
 290                 printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start,
 291                     order);
 292                 return;
 293         }
 294         list[len].start = start;
 295         list[len].order = order;
 296         eni_dev->free_len = len+1;
 297         /*dump_mem(eni_dev);*/
 298 }
 299
 300
 301 /*----------------------------------- RX ------------------------------------*/
 302
 303
 304 #define ENI_VCC_NOS ((struct atm_vcc *) 1)
 305
 306
 307 static void rx_ident_err(struct atm_vcc *vcc)
 308 {
 309         struct atm_dev *dev;
 310         struct eni_dev *eni_dev;
 311         struct eni_vcc *eni_vcc;
 312
 313         dev = vcc->dev;
 314         eni_dev = ENI_DEV(dev);
 315         /* immediately halt adapter */
 316         eni_out(eni_in(MID_MC_S) &
 317             ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S);
 318         /* dump useful information */
 319         eni_vcc = ENI_VCC(vcc);
 320         printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident "
 321             "mismatch\n",dev->number);
 322         printk(KERN_ALERT "  VCI %d, rxing %d, words %ld\n",vcc->vci,
 323             eni_vcc->rxing,eni_vcc->words);
 324         printk(KERN_ALERT "  host descr 0x%lx, rx pos 0x%lx, descr value "
 325             "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos,
 326             (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4));
 327         printk(KERN_ALERT "  last %p, servicing %d\n",eni_vcc->last,
 328             eni_vcc->servicing);
 329         EVENT("---dump ends here---\n",0,0);
 330         printk(KERN_NOTICE "---recent events---\n");
 331         event_dump();
 332         ENI_DEV(dev)->fast = NULL; /* really stop it */
 333         ENI_DEV(dev)->slow = NULL;
 334         skb_queue_head_init(&ENI_DEV(dev)->rx_queue);
 335 }
 336
 337
 338 static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb,
 339     unsigned long skip,unsigned long size,unsigned long eff)
 340 {
 341         struct eni_dev *eni_dev;
 342         struct eni_vcc *eni_vcc;
 343         u32 dma_rd,dma_wr;
 344         u32 dma[RX_DMA_BUF*2];
 345         dma_addr_t paddr;
 346         unsigned long here;
 347         int i,j;
 348
 349         eni_dev = ENI_DEV(vcc->dev);
 350         eni_vcc = ENI_VCC(vcc);
 351         paddr = 0; /* GCC, shut up */
 352         if (skb) {
 353                 paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len,
 354                                        DMA_FROM_DEVICE);
 355                 if (dma_mapping_error(&eni_dev->pci_dev->dev, paddr))
 356                         goto dma_map_error;
 357                 ENI_PRV_PADDR(skb) = paddr;
 358                 if (paddr & 3)
 359                         printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has "
 360                             "mis-aligned RX data (0x%lx)\n",vcc->dev->number,
 361                             vcc->vci,(unsigned long) paddr);
 362                 ENI_PRV_SIZE(skb) = size+skip;
 363                     /* PDU plus descriptor */
 364                 ATM_SKB(skb)->vcc = vcc;
 365         }
 366         j = 0;
 367         if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */
 368                 here = (eni_vcc->descr+skip) & (eni_vcc->words-1);
 369                 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci
 370                     << MID_DMA_VCI_SHIFT) | MID_DT_JK;
 371                 dma[j++] = 0;
 372         }
 373         here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1);
 374         if (!eff) size += skip;
 375         else {
 376                 unsigned long words;
 377
 378                 if (!size) {
 379                         DPRINTK("strange things happen ...\n");
 380                         EVENT("strange things happen ... (skip=%ld,eff=%ld)\n",
 381                             size,eff);
 382                 }
 383                 words = eff;
 384                 if (paddr & 15) {
 385                         unsigned long init;
 386
 387                         init = 4-((paddr & 15) >> 2);
 388                         if (init > words) init = words;
 389                         dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
 390                             (vcc->vci << MID_DMA_VCI_SHIFT);
 391                         dma[j++] = paddr;
 392                         paddr += init << 2;
 393                         words -= init;
 394                 }
 395 #ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */
 396                 if (words & ~15) {
 397                         dma[j++] = MID_DT_16W | ((words >> 4) <<
 398                             MID_DMA_COUNT_SHIFT) | (vcc->vci <<
 399                             MID_DMA_VCI_SHIFT);
 400                         dma[j++] = paddr;
 401                         paddr += (words & ~15) << 2;
 402                         words &= 15;
 403                 }
 404 #endif
 405 #ifdef CONFIG_ATM_ENI_BURST_RX_8W  /* works only with *some* PCI chipsets ... */
 406                 if (words & ~7) {
 407                         dma[j++] = MID_DT_8W | ((words >> 3) <<
 408                             MID_DMA_COUNT_SHIFT) | (vcc->vci <<
 409                             MID_DMA_VCI_SHIFT);
 410                         dma[j++] = paddr;
 411                         paddr += (words & ~7) << 2;
 412                         words &= 7;
 413                 }
 414 #endif
 415 #ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */
 416                 if (words & ~3) {
 417                         dma[j++] = MID_DT_4W | ((words >> 2) <<
 418                             MID_DMA_COUNT_SHIFT) | (vcc->vci <<
 419                             MID_DMA_VCI_SHIFT);
 420                         dma[j++] = paddr;
 421                         paddr += (words & ~3) << 2;
 422                         words &= 3;
 423                 }
 424 #endif
 425 #ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */
 426                 if (words & ~1) {
 427                         dma[j++] = MID_DT_2W | ((words >> 1) <<
 428                             MID_DMA_COUNT_SHIFT) | (vcc->vci <<
 429                             MID_DMA_VCI_SHIFT);
 430                         dma[j++] = paddr;
 431                         paddr += (words & ~1) << 2;
 432                         words &= 1;
 433                 }
 434 #endif
 435                 if (words) {
 436                         dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT)
 437                             | (vcc->vci << MID_DMA_VCI_SHIFT);
 438                         dma[j++] = paddr;
 439                 }
 440         }
 441         if (size != eff) {
 442                 dma[j++] = (here << MID_DMA_COUNT_SHIFT) |
 443                     (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK;
 444                 dma[j++] = 0;
 445         }
 446         if (!j || j > 2*RX_DMA_BUF) {
 447                 printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n");
 448                 goto trouble;
 449         }
 450         dma[j-2] |= MID_DMA_END;
 451         j = j >> 1;
 452         dma_wr = eni_in(MID_DMA_WR_RX);
 453         dma_rd = eni_in(MID_DMA_RD_RX);
 454         /*
 455          * Can I move the dma_wr pointer by 2j+1 positions without overwriting
 456          * data that hasn't been read (position of dma_rd) yet ?
 457          */
 458         if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */
 459                 printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n",
 460                     vcc->dev->number);
 461                 goto trouble;
 462         }
 463         for (i = 0; i < j; i++) {
 464                 writel(dma[i*2],eni_dev->rx_dma+dma_wr*8);
 465                 writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4);
 466                 dma_wr = (dma_wr+1) & (NR_DMA_RX-1);
 467         }
 468         if (skb) {
 469                 ENI_PRV_POS(skb) = eni_vcc->descr+size+1;
 470                 skb_queue_tail(&eni_dev->rx_queue,skb);
 471                 eni_vcc->last = skb;
 472                 rx_enqueued++;
 473         }
 474         eni_vcc->descr = here;
 475         eni_out(dma_wr,MID_DMA_WR_RX);
 476         return 0;
 477
 478 trouble:
 479         if (paddr)
 480                 dma_unmap_single(&eni_dev->pci_dev->dev,paddr,skb->len,
 481                                  DMA_FROM_DEVICE);
 482 dma_map_error:
 483         if (skb) dev_kfree_skb_irq(skb);
 484         return -1;
 485 }
 486
 487
 488 static void discard(struct atm_vcc *vcc,unsigned long size)
 489 {
 490         struct eni_vcc *eni_vcc;
 491
 492         eni_vcc = ENI_VCC(vcc);
 493         EVENT("discard (size=%ld)\n",size,0);
 494         while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0);
 495             /* could do a full fallback, but that might be more expensive */
 496         if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1;
 497         else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1);
 498 }
 499
 500
 501 /*
 502  * TODO: should check whether direct copies (without DMA setup, dequeuing on
 503  * interrupt, etc.) aren't much faster for AAL0
 504  */
 505
 506 static int rx_aal0(struct atm_vcc *vcc)
 507 {
 508         struct eni_vcc *eni_vcc;
 509         unsigned long descr;
 510         unsigned long length;
 511         struct sk_buff *skb;
 512
 513         DPRINTK(">rx_aal0\n");
 514         eni_vcc = ENI_VCC(vcc);
 515         descr = readl(eni_vcc->recv+eni_vcc->descr*4);
 516         if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
 517                 rx_ident_err(vcc);
 518                 return 1;
 519         }
 520         if (descr & MID_RED_T) {
 521                 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
 522                     vcc->dev->number);
 523                 length = 0;
 524                 atomic_inc(&vcc->stats->rx_err);
 525         }
 526         else {
 527                 length = ATM_CELL_SIZE-1; /* no HEC */
 528         }
 529         skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL;
 530         if (!skb) {
 531                 discard(vcc,length >> 2);
 532                 return 0;
 533         }
 534         skb_put(skb,length);
 535         skb->tstamp = eni_vcc->timestamp;
 536         DPRINTK("got len %ld\n",length);
 537         if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1;
 538         eni_vcc->rxing++;
 539         return 0;
 540 }
 541
 542
 543 static int rx_aal5(struct atm_vcc *vcc)
 544 {
 545         struct eni_vcc *eni_vcc;
 546         unsigned long descr;
 547         unsigned long size,eff,length;
 548         struct sk_buff *skb;
 549
 550         EVENT("rx_aal5\n",0,0);
 551         DPRINTK(">rx_aal5\n");
 552         eni_vcc = ENI_VCC(vcc);
 553         descr = readl(eni_vcc->recv+eni_vcc->descr*4);
 554         if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
 555                 rx_ident_err(vcc);
 556                 return 1;
 557         }
 558         if (descr & (MID_RED_T | MID_RED_CRC_ERR)) {
 559                 if (descr & MID_RED_T) {
 560                         EVENT("empty cell (descr=0x%lx)\n",descr,0);
 561                         DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
 562                             vcc->dev->number);
 563                         size = 0;
 564                 }
 565                 else {
 566                         static unsigned long silence = 0;
 567
 568                         if (time_after(jiffies, silence) || silence == 0) {
 569                                 printk(KERN_WARNING DEV_LABEL "(itf %d): "
 570                                     "discarding PDU(s) with CRC error\n",
 571                                     vcc->dev->number);
 572                                 silence = (jiffies+2*HZ)|1;
 573                         }
 574                         size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
 575                         EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr,
 576                             size);
 577                 }
 578                 eff = length = 0;
 579                 atomic_inc(&vcc->stats->rx_err);
 580         }
 581         else {
 582                 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
 583                 DPRINTK("size=%ld\n",size);
 584                 length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) &
 585                     (eni_vcc->words-1)))*4) & 0xffff;
 586                                 /* -trailer(2)+header(1) */
 587                 if (length && length <= (size << 2)-8 && length <=
 588                   ATM_MAX_AAL5_PDU) eff = (length+3) >> 2;
 589                 else {                           /* ^ trailer length (8) */
 590                         EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr,
 591                             length);
 592                         printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU "
 593                             "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n",
 594                             vcc->dev->number,vcc->vci,length,size << 2,descr);
 595                         length = eff = 0;
 596                         atomic_inc(&vcc->stats->rx_err);
 597                 }
 598         }
 599         skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL;
 600         if (!skb) {
 601                 discard(vcc,size);
 602                 return 0;
 603         }
 604         skb_put(skb,length);
 605         DPRINTK("got len %ld\n",length);
 606         if (do_rx_dma(vcc,skb,1,size,eff)) return 1;
 607         eni_vcc->rxing++;
 608         return 0;
 609 }
 610
 611
 612 static inline int rx_vcc(struct atm_vcc *vcc)
 613 {
 614         void __iomem *vci_dsc;
 615         unsigned long tmp;
 616         struct eni_vcc *eni_vcc;
 617
 618         eni_vcc = ENI_VCC(vcc);
 619         vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16;
 620         EVENT("rx_vcc(1)\n",0,0);
 621         while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >>
 622             MID_VCI_DESCR_SHIFT)) {
 623                 EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n",
 624                     eni_vcc->descr,tmp);
 625                 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
 626                     (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
 627                     MID_VCI_DESCR_SHIFT));
 628                 if (ENI_VCC(vcc)->rx(vcc)) return 1;
 629         }
 630         /* clear IN_SERVICE flag */
 631         writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc);
 632         /*
 633          * If new data has arrived between evaluating the while condition and
 634          * clearing IN_SERVICE, we wouldn't be notified until additional data
 635          * follows. So we have to loop again to be sure.
 636          */
 637         EVENT("rx_vcc(3)\n",0,0);
 638         while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR)
 639             >> MID_VCI_DESCR_SHIFT)) {
 640                 EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n",
 641                     eni_vcc->descr,tmp);
 642                 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
 643                     (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
 644                     MID_VCI_DESCR_SHIFT));
 645                 if (ENI_VCC(vcc)->rx(vcc)) return 1;
 646         }
 647         return 0;
 648 }
 649
 650
 651 static void poll_rx(struct atm_dev *dev)
 652 {
 653         struct eni_dev *eni_dev;
 654         struct atm_vcc *curr;
 655
 656         eni_dev = ENI_DEV(dev);
 657         while ((curr = eni_dev->fast)) {
 658                 EVENT("poll_rx.fast\n",0,0);
 659                 if (rx_vcc(curr)) return;
 660                 eni_dev->fast = ENI_VCC(curr)->next;
 661                 ENI_VCC(curr)->next = ENI_VCC_NOS;
 662                 barrier();
 663                 ENI_VCC(curr)->servicing--;
 664         }
 665         while ((curr = eni_dev->slow)) {
 666                 EVENT("poll_rx.slow\n",0,0);
 667                 if (rx_vcc(curr)) return;
 668                 eni_dev->slow = ENI_VCC(curr)->next;
 669                 ENI_VCC(curr)->next = ENI_VCC_NOS;
 670                 barrier();
 671                 ENI_VCC(curr)->servicing--;
 672         }
 673 }
 674
 675
 676 static void get_service(struct atm_dev *dev)
 677 {
 678         struct eni_dev *eni_dev;
 679         struct atm_vcc *vcc;
 680         unsigned long vci;
 681
 682         DPRINTK(">get_service\n");
 683         eni_dev = ENI_DEV(dev);
 684         while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) {
 685                 vci = readl(eni_dev->service+eni_dev->serv_read*4);
 686                 eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1);
 687                 vcc = eni_dev->rx_map[vci & 1023];
 688                 if (!vcc) {
 689                         printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not "
 690                             "found\n",dev->number,vci);
 691                         continue; /* nasty but we try to go on anyway */
 692                         /* @@@ nope, doesn't work */
 693                 }
 694                 EVENT("getting from service\n",0,0);
 695                 if (ENI_VCC(vcc)->next != ENI_VCC_NOS) {
 696                         EVENT("double service\n",0,0);
 697                         DPRINTK("Grr, servicing VCC %ld twice\n",vci);
 698                         continue;
 699                 }
 700                 ENI_VCC(vcc)->timestamp = ktime_get_real();
 701                 ENI_VCC(vcc)->next = NULL;
 702                 if (vcc->qos.rxtp.traffic_class == ATM_CBR) {
 703                         if (eni_dev->fast)
 704                                 ENI_VCC(eni_dev->last_fast)->next = vcc;
 705                         else eni_dev->fast = vcc;
 706                         eni_dev->last_fast = vcc;
 707                 }
 708                 else {
 709                         if (eni_dev->slow)
 710                                 ENI_VCC(eni_dev->last_slow)->next = vcc;
 711                         else eni_dev->slow = vcc;
 712                         eni_dev->last_slow = vcc;
 713                 }
 714                 putting++;
 715                 ENI_VCC(vcc)->servicing++;
 716         }
 717 }
 718
 719
 720 static void dequeue_rx(struct atm_dev *dev)
 721 {
 722         struct eni_dev *eni_dev;
 723         struct eni_vcc *eni_vcc;
 724         struct atm_vcc *vcc;
 725         struct sk_buff *skb;
 726         void __iomem *vci_dsc;
 727         int first;
 728
 729         eni_dev = ENI_DEV(dev);
 730         first = 1;
 731         while (1) {
 732                 skb = skb_dequeue(&eni_dev->rx_queue);
 733                 if (!skb) {
 734                         if (first) {
 735                                 DPRINTK(DEV_LABEL "(itf %d): RX but not "
 736                                     "rxing\n",dev->number);
 737                                 EVENT("nothing to dequeue\n",0,0);
 738                         }
 739                         break;
 740                 }
 741                 EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb),
 742                     ENI_PRV_POS(skb));
 743                 rx_dequeued++;
 744                 vcc = ATM_SKB(skb)->vcc;
 745                 eni_vcc = ENI_VCC(vcc);
 746                 first = 0;
 747                 vci_dsc = eni_dev->vci+vcc->vci*16;
 748                 if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb),
 749                     (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT,
 750                     eni_vcc->words)) {
 751                         EVENT("requeuing\n",0,0);
 752                         skb_queue_head(&eni_dev->rx_queue,skb);
 753                         break;
 754                 }
 755                 eni_vcc->rxing--;
 756                 eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1);
 757                 dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len,
 758                                  DMA_TO_DEVICE);
 759                 if (!skb->len) dev_kfree_skb_irq(skb);
 760                 else {
 761                         EVENT("pushing (len=%ld)\n",skb->len,0);
 762                         if (vcc->qos.aal == ATM_AAL0)
 763                                 *(unsigned long *) skb->data =
 764                                     ntohl(*(unsigned long *) skb->data);
 765                         memset(skb->cb,0,sizeof(struct eni_skb_prv));
 766                         vcc->push(vcc,skb);
 767                         pushed++;
 768                 }
 769                 atomic_inc(&vcc->stats->rx);
 770         }
 771         wake_up(&eni_dev->rx_wait);
 772 }
 773
 774
 775 static int open_rx_first(struct atm_vcc *vcc)
 776 {
 777         struct eni_dev *eni_dev;
 778         struct eni_vcc *eni_vcc;
 779         unsigned long size;
 780
 781         DPRINTK("open_rx_first\n");
 782         eni_dev = ENI_DEV(vcc->dev);
 783         eni_vcc = ENI_VCC(vcc);
 784         eni_vcc->rx = NULL;
 785         if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0;
 786         size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100;
 787         if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <=
 788             MID_MAX_BUF_SIZE)
 789                 size = MID_MAX_BUF_SIZE;
 790         eni_vcc->recv = eni_alloc_mem(eni_dev,&size);
 791         DPRINTK("rx at 0x%lx\n",eni_vcc->recv);
 792         eni_vcc->words = size >> 2;
 793         if (!eni_vcc->recv) return -ENOBUFS;
 794         eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0;
 795         eni_vcc->descr = 0;
 796         eni_vcc->rx_pos = 0;
 797         eni_vcc->rxing = 0;
 798         eni_vcc->servicing = 0;
 799         eni_vcc->next = ENI_VCC_NOS;
 800         return 0;
 801 }
 802
 803
 804 static int open_rx_second(struct atm_vcc *vcc)
 805 {
 806         void __iomem *here;
 807         struct eni_dev *eni_dev;
 808         struct eni_vcc *eni_vcc;
 809         unsigned long size;
 810         int order;
 811
 812         DPRINTK("open_rx_second\n");
 813         eni_dev = ENI_DEV(vcc->dev);
 814         eni_vcc = ENI_VCC(vcc);
 815         if (!eni_vcc->rx) return 0;
 816         /* set up VCI descriptor */
 817         here = eni_dev->vci+vcc->vci*16;
 818         DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4);
 819         size = eni_vcc->words >> 8;
 820         for (order = -1; size; order++) size >>= 1;
 821         writel(0,here+4); /* descr, read = 0 */
 822         writel(0,here+8); /* write, state, count = 0 */
 823         if (eni_dev->rx_map[vcc->vci])
 824                 printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already "
 825                     "in use\n",vcc->dev->number,vcc->vci);
 826         eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */
 827         writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) <<
 828             MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE |
 829             (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) <<
 830             MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here);
 831         return 0;
 832 }
 833
 834
 835 static void close_rx(struct atm_vcc *vcc)
 836 {
 837         DECLARE_WAITQUEUE(wait,current);
 838         void __iomem *here;
 839         struct eni_dev *eni_dev;
 840         struct eni_vcc *eni_vcc;
 841
 842         eni_vcc = ENI_VCC(vcc);
 843         if (!eni_vcc->rx) return;
 844         eni_dev = ENI_DEV(vcc->dev);
 845         if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) {
 846                 here = eni_dev->vci+vcc->vci*16;
 847                 /* block receiver */
 848                 writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH <<
 849                     MID_VCI_MODE_SHIFT),here);
 850                 /* wait for receiver to become idle */
 851                 udelay(27);
 852                 /* discard pending cell */
 853                 writel(readl(here) & ~MID_VCI_IN_SERVICE,here);
 854                 /* don't accept any new ones */
 855                 eni_dev->rx_map[vcc->vci] = NULL;
 856                 /* wait for RX queue to drain */
 857                 DPRINTK("eni_close: waiting for RX ...\n");
 858                 EVENT("RX closing\n",0,0);
 859                 add_wait_queue(&eni_dev->rx_wait,&wait);
 860                 set_current_state(TASK_UNINTERRUPTIBLE);
 861                 barrier();
 862                 for (;;) {
 863                         /* transition service->rx: rxing++, servicing-- */
 864                         if (!eni_vcc->servicing) {
 865                                 barrier();
 866                                 if (!eni_vcc->rxing) break;
 867                         }
 868                         EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing,
 869                             eni_vcc->servicing);
 870                         printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing,
 871                             eni_vcc->rxing);
 872                         schedule();
 873                         set_current_state(TASK_UNINTERRUPTIBLE);
 874                 }
 875                 for (;;) {
 876                         int at_end;
 877                         u32 tmp;
 878
 879                         tasklet_disable(&eni_dev->task);
 880                         tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ;
 881                         at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT;
 882                         tasklet_enable(&eni_dev->task);
 883                         if (at_end) break;
 884                         EVENT("drain discard (host 0x%lx, nic 0x%lx)\n",
 885                             eni_vcc->rx_pos,tmp);
 886                         printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n",
 887                             eni_vcc->rx_pos,tmp);
 888                         schedule();
 889                         set_current_state(TASK_UNINTERRUPTIBLE);
 890                 }
 891                 set_current_state(TASK_RUNNING);
 892                 remove_wait_queue(&eni_dev->rx_wait,&wait);
 893         }
 894         eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2);
 895         eni_vcc->rx = NULL;
 896 }
 897
 898
 899 static int start_rx(struct atm_dev *dev)
 900 {
 901         struct eni_dev *eni_dev;
 902
 903         eni_dev = ENI_DEV(dev);
 904         eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL);
 905         if (!eni_dev->rx_map) {
 906                 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
 907                     dev->number);
 908                 free_page((unsigned long) eni_dev->free_list);
 909                 return -ENOMEM;
 910         }
 911         eni_dev->rx_mult = DEFAULT_RX_MULT;
 912         eni_dev->fast = eni_dev->last_fast = NULL;
 913         eni_dev->slow = eni_dev->last_slow = NULL;
 914         init_waitqueue_head(&eni_dev->rx_wait);
 915         skb_queue_head_init(&eni_dev->rx_queue);
 916         eni_dev->serv_read = eni_in(MID_SERV_WRITE);
 917         eni_out(0,MID_DMA_WR_RX);
 918         return 0;
 919 }
 920
 921
 922 /*----------------------------------- TX ------------------------------------*/
 923
 924
 925 enum enq_res { enq_ok,enq_next,enq_jam };
 926
 927
 928 static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr,
 929     u32 size)
 930 {
 931         u32 init,words;
 932
 933         DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size);
 934         EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size);
 935 #if 0 /* don't complain anymore */
 936         if (paddr & 3)
 937                 printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr);
 938         if (size & 3)
 939                 printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size);
 940 #endif
 941         if (paddr & 3) {
 942                 init = 4-(paddr & 3);
 943                 if (init > size || size < 7) init = size;
 944                 DPRINTK("put_dma: %lx DMA: %d/%d bytes\n",
 945                     (unsigned long) paddr,init,size);
 946                 dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) |
 947                     (chan << MID_DMA_CHAN_SHIFT);
 948                 dma[(*j)++] = paddr;
 949                 paddr += init;
 950                 size -= init;
 951         }
 952         words = size >> 2;
 953         size &= 3;
 954         if (words && (paddr & 31)) {
 955                 init = 8-((paddr & 31) >> 2);
 956                 if (init > words) init = words;
 957                 DPRINTK("put_dma: %lx DMA: %d/%d words\n",
 958                     (unsigned long) paddr,init,words);
 959                 dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
 960                     (chan << MID_DMA_CHAN_SHIFT);
 961                 dma[(*j)++] = paddr;
 962                 paddr += init << 2;
 963                 words -= init;
 964         }
 965 #ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */
 966         if (words & ~15) {
 967                 DPRINTK("put_dma: %lx DMA: %d*16/%d words\n",
 968                     (unsigned long) paddr,words >> 4,words);
 969                 dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT)
 970                     | (chan << MID_DMA_CHAN_SHIFT);
 971                 dma[(*j)++] = paddr;
 972                 paddr += (words & ~15) << 2;
 973                 words &= 15;
 974         }
 975 #endif
 976 #ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */
 977         if (words & ~7) {
 978                 DPRINTK("put_dma: %lx DMA: %d*8/%d words\n",
 979                     (unsigned long) paddr,words >> 3,words);
 980                 dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT)
 981                     | (chan << MID_DMA_CHAN_SHIFT);
 982                 dma[(*j)++] = paddr;
 983                 paddr += (words & ~7) << 2;
 984                 words &= 7;
 985         }
 986 #endif
 987 #ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */
 988         if (words & ~3) {
 989                 DPRINTK("put_dma: %lx DMA: %d*4/%d words\n",
 990                     (unsigned long) paddr,words >> 2,words);
 991                 dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT)
 992                     | (chan << MID_DMA_CHAN_SHIFT);
 993                 dma[(*j)++] = paddr;
 994                 paddr += (words & ~3) << 2;
 995                 words &= 3;
 996         }
 997 #endif
 998 #ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */
 999         if (words & ~1) {
1000                 DPRINTK("put_dma: %lx DMA: %d*2/%d words\n",
1001                     (unsigned long) paddr,words >> 1,words);
1002                 dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT)
1003                     | (chan << MID_DMA_CHAN_SHIFT);
1004                 dma[(*j)++] = paddr;
1005                 paddr += (words & ~1) << 2;
1006                 words &= 1;
1007         }
1008 #endif
1009         if (words) {
1010                 DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr,
1011                     words);
1012                 dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) |
1013                     (chan << MID_DMA_CHAN_SHIFT);
1014                 dma[(*j)++] = paddr;
1015                 paddr += words << 2;
1016         }
1017         if (size) {
1018                 DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr,
1019                     size);
1020                 dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) |
1021                     (chan << MID_DMA_CHAN_SHIFT);
1022                 dma[(*j)++] = paddr;
1023         }
1024 }
1025
1026
1027 static enum enq_res do_tx(struct sk_buff *skb)
1028 {
1029         struct atm_vcc *vcc;
1030         struct eni_dev *eni_dev;
1031         struct eni_vcc *eni_vcc;
1032         struct eni_tx *tx;
1033         dma_addr_t paddr;
1034         u32 dma_rd,dma_wr;
1035         u32 size; /* in words */
1036         int aal5,dma_size,i,j;
1037
1038         DPRINTK(">do_tx\n");
1039         NULLCHECK(skb);
1040         EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len);
1041         vcc = ATM_SKB(skb)->vcc;
1042         NULLCHECK(vcc);
1043         eni_dev = ENI_DEV(vcc->dev);
1044         NULLCHECK(eni_dev);
1045         eni_vcc = ENI_VCC(vcc);
1046         tx = eni_vcc->tx;
1047         NULLCHECK(tx);
1048 #if 0 /* Enable this for testing with the "align" program */
1049         {
1050                 unsigned int hack = *((char *) skb->data)-'0';
1051
1052                 if (hack < 8) {
1053                         skb->data += hack;
1054                         skb->len -= hack;
1055                 }
1056         }
1057 #endif
1058 #if 0 /* should work now */
1059         if ((unsigned long) skb->data & 3)
1060                 printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned "
1061                     "TX data\n",vcc->dev->number,vcc->vci);
1062 #endif
1063         /*
1064          * Potential future IP speedup: make hard_header big enough to put
1065          * segmentation descriptor directly into PDU. Saves: 4 slave writes,
1066          * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-)
1067          */
1068
1069         aal5 = vcc->qos.aal == ATM_AAL5;
1070         /* check space in buffer */
1071         if (!aal5)
1072                 size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE;
1073                         /* cell without HEC plus segmentation header (includes
1074                            four-byte cell header) */
1075         else {
1076                 size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1;
1077                         /* add AAL5 trailer */
1078                 size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE;
1079                                                 /* add segmentation header */
1080         }
1081         /*
1082          * Can I move tx_pos by size bytes without getting closer than TX_GAP
1083          * to the read pointer ? TX_GAP means to leave some space for what
1084          * the manual calls "too close".
1085          */
1086         if (!NEPMOK(tx->tx_pos,size+TX_GAP,
1087             eni_in(MID_TX_RDPTR(tx->index)),tx->words)) {
1088                 DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n",
1089                     vcc->dev->number,size);
1090                 return enq_next;
1091         }
1092         /* check DMA */
1093         dma_wr = eni_in(MID_DMA_WR_TX);
1094         dma_rd = eni_in(MID_DMA_RD_TX);
1095         dma_size = 3; /* JK for descriptor and final fill, plus final size
1096                          mis-alignment fix */
1097 DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags);
1098         if (!skb_shinfo(skb)->nr_frags) dma_size += 5;
1099         else dma_size += 5*(skb_shinfo(skb)->nr_frags+1);
1100         if (dma_size > TX_DMA_BUF) {
1101                 printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries "
1102                     "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF);
1103         }
1104         DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos);
1105         if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) <
1106              dma_size) {
1107                 printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n",
1108                     vcc->dev->number);
1109                 return enq_jam;
1110         }
1111         paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len,
1112                                DMA_TO_DEVICE);
1113         ENI_PRV_PADDR(skb) = paddr;
1114         /* prepare DMA queue entries */
1115         j = 0;
1116         eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) <<
1117              MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1118              MID_DT_JK;
1119         j++;
1120         if (!skb_shinfo(skb)->nr_frags)
1121                 if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len);
1122                 else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4);
1123         else {
1124 DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */
1125                 for (i = -1; i < skb_shinfo(skb)->nr_frags; i++)
1126                         if (i == -1)
1127                                 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1128                                     skb->data,
1129                                     skb_headlen(skb));
1130                         else
1131                                 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1132                                     skb_frag_page(&skb_shinfo(skb)->frags[i]) +
1133                                         skb_frag_off(&skb_shinfo(skb)->frags[i]),
1134                                     skb_frag_size(&skb_shinfo(skb)->frags[i]));
1135         }
1136         if (skb->len & 3) {
1137                 put_dma(tx->index, eni_dev->dma, &j, eni_dev->zero.dma,
1138                         4 - (skb->len & 3));
1139         }
1140         /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */
1141         eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) <<
1142              MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1143              MID_DMA_END | MID_DT_JK;
1144         j++;
1145         DPRINTK("DMA at end: %d\n",j);
1146         /* store frame */
1147         writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) |
1148             (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) |
1149             (tx->resolution << MID_SEG_RATE_SHIFT) |
1150             (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4);
1151 /*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/
1152         writel((vcc->vci << MID_SEG_VCI_SHIFT) |
1153             (aal5 ? 0 : (skb->data[3] & 0xf)) |
1154             (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0),
1155             tx->send+((tx->tx_pos+1) & (tx->words-1))*4);
1156         DPRINTK("size: %d, len:%d\n",size,skb->len);
1157         if (aal5)
1158                 writel(skb->len,tx->send+
1159                     ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4);
1160         j = j >> 1;
1161         for (i = 0; i < j; i++) {
1162                 writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8);
1163                 writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4);
1164                 dma_wr = (dma_wr+1) & (NR_DMA_TX-1);
1165         }
1166         ENI_PRV_POS(skb) = tx->tx_pos;
1167         ENI_PRV_SIZE(skb) = size;
1168         ENI_VCC(vcc)->txing += size;
1169         tx->tx_pos = (tx->tx_pos+size) & (tx->words-1);
1170         DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos);
1171         eni_out(dma_wr,MID_DMA_WR_TX);
1172         skb_queue_tail(&eni_dev->tx_queue,skb);
1173         queued++;
1174         return enq_ok;
1175 }
1176
1177
1178 static void poll_tx(struct atm_dev *dev)
1179 {
1180         struct eni_tx *tx;
1181         struct sk_buff *skb;
1182         enum enq_res res;
1183         int i;
1184
1185         DPRINTK(">poll_tx\n");
1186         for (i = NR_CHAN-1; i >= 0; i--) {
1187                 tx = &ENI_DEV(dev)->tx[i];
1188                 if (tx->send)
1189                         while ((skb = skb_dequeue(&tx->backlog))) {
1190                                 res = do_tx(skb);
1191                                 if (res == enq_ok) continue;
1192                                 DPRINTK("re-queuing TX PDU\n");
1193                                 skb_queue_head(&tx->backlog,skb);
1194                                 requeued++;
1195                                 if (res == enq_jam) return;
1196                                 break;
1197                         }
1198         }
1199 }
1200
1201
1202 static void dequeue_tx(struct atm_dev *dev)
1203 {
1204         struct eni_dev *eni_dev;
1205         struct atm_vcc *vcc;
1206         struct sk_buff *skb;
1207         struct eni_tx *tx;
1208
1209         NULLCHECK(dev);
1210         eni_dev = ENI_DEV(dev);
1211         NULLCHECK(eni_dev);
1212         while ((skb = skb_dequeue(&eni_dev->tx_queue))) {
1213                 vcc = ATM_SKB(skb)->vcc;
1214                 NULLCHECK(vcc);
1215                 tx = ENI_VCC(vcc)->tx;
1216                 NULLCHECK(ENI_VCC(vcc)->tx);
1217                 DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb),
1218                     (unsigned) eni_in(MID_TX_DESCRSTART(tx->index)));
1219                 if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) ==
1220                     eni_in(MID_TX_DESCRSTART(tx->index))) {
1221                         skb_queue_head(&eni_dev->tx_queue,skb);
1222                         break;
1223                 }
1224                 ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb);
1225                 dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len,
1226                                  DMA_TO_DEVICE);
1227                 if (vcc->pop) vcc->pop(vcc,skb);
1228                 else dev_kfree_skb_irq(skb);
1229                 atomic_inc(&vcc->stats->tx);
1230                 wake_up(&eni_dev->tx_wait);
1231                 dma_complete++;
1232         }
1233 }
1234
1235
1236 static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr)
1237 {
1238         int i;
1239
1240         for (i = !ubr; i < NR_CHAN; i++)
1241                 if (!eni_dev->tx[i].send) return eni_dev->tx+i;
1242         return NULL;
1243 }
1244
1245
1246 static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre,
1247     int *res,int unlimited)
1248 {
1249         static const int pre_div[] = { 4,16,128,2048 };
1250             /* 2^(((x+2)^2-(x+2))/2+1) */
1251
1252         if (unlimited) *pre = *res = 0;
1253         else {
1254                 if (*pcr > 0) {
1255                         int div;
1256
1257                         for (*pre = 0; *pre < 3; (*pre)++)
1258                                 if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break;
1259                         div = pre_div[*pre]**pcr;
1260                         DPRINTK("min div %d\n",div);
1261                         *res = TS_CLOCK/div-1;
1262                 }
1263                 else {
1264                         int div;
1265
1266                         if (!*pcr) *pcr = eni_dev->tx_bw+reserved;
1267                         for (*pre = 3; *pre >= 0; (*pre)--)
1268                                 if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break;
1269                         if (*pre < 3) (*pre)++; /* else fail later */
1270                         div = pre_div[*pre]*-*pcr;
1271                         DPRINTK("max div %d\n",div);
1272                         *res = DIV_ROUND_UP(TS_CLOCK, div)-1;
1273                 }
1274                 if (*res < 0) *res = 0;
1275                 if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE;
1276         }
1277         *pcr = TS_CLOCK/pre_div[*pre]/(*res+1);
1278         DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res);
1279         return 0;
1280 }
1281
1282
1283 static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp,
1284     int set_rsv,int set_shp)
1285 {
1286         struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1287         struct eni_vcc *eni_vcc = ENI_VCC(vcc);
1288         struct eni_tx *tx;
1289         unsigned long size;
1290         void __iomem *mem;
1291         int rate,ubr,unlimited,new_tx;
1292         int pre,res,order;
1293         int error;
1294
1295         rate = atm_pcr_goal(txtp);
1296         ubr = txtp->traffic_class == ATM_UBR;
1297         unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR ||
1298             rate >= ATM_OC3_PCR);
1299         if (!unlimited) {
1300                 size = txtp->max_sdu*eni_dev->tx_mult/100;
1301                 if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <=
1302                     MID_MAX_BUF_SIZE)
1303                         size = MID_MAX_BUF_SIZE;
1304         }
1305         else {
1306                 if (eni_dev->ubr) {
1307                         eni_vcc->tx = eni_dev->ubr;
1308                         txtp->pcr = ATM_OC3_PCR;
1309                         return 0;
1310                 }
1311                 size = UBR_BUFFER;
1312         }
1313         new_tx = !eni_vcc->tx;
1314         mem = NULL; /* for gcc */
1315         if (!new_tx) tx = eni_vcc->tx;
1316         else {
1317                 mem = eni_alloc_mem(eni_dev,&size);
1318                 if (!mem) return -ENOBUFS;
1319                 tx = alloc_tx(eni_dev,unlimited);
1320                 if (!tx) {
1321                         eni_free_mem(eni_dev,mem,size);
1322                         return -EBUSY;
1323                 }
1324                 DPRINTK("got chan %d\n",tx->index);
1325                 tx->reserved = tx->shaping = 0;
1326                 tx->send = mem;
1327                 tx->words = size >> 2;
1328                 skb_queue_head_init(&tx->backlog);
1329                 for (order = 0; size > (1 << (order+10)); order++);
1330                 eni_out((order << MID_SIZE_SHIFT) |
1331                     ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)),
1332                     MID_TX_PLACE(tx->index));
1333                 tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) &
1334                     MID_DESCR_START;
1335         }
1336         error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited);
1337         if (!error  && txtp->min_pcr > rate) error = -EINVAL;
1338         if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR &&
1339             txtp->max_pcr < rate) error = -EINVAL;
1340         if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved)
1341                 error = -EINVAL;
1342         if (!error && set_rsv && !set_shp && rate < tx->shaping)
1343                 error = -EINVAL;
1344         if (!error && !set_rsv && rate > tx->reserved && !ubr)
1345                 error = -EINVAL;
1346         if (error) {
1347                 if (new_tx) {
1348                         tx->send = NULL;
1349                         eni_free_mem(eni_dev,mem,size);
1350                 }
1351                 return error;
1352         }
1353         txtp->pcr = rate;
1354         if (set_rsv && !ubr) {
1355                 eni_dev->tx_bw += tx->reserved;
1356                 tx->reserved = rate;
1357                 eni_dev->tx_bw -= rate;
1358         }
1359         if (set_shp || (unlimited && new_tx)) {
1360                 if (unlimited && new_tx) eni_dev->ubr = tx;
1361                 tx->prescaler = pre;
1362                 tx->resolution = res;
1363                 tx->shaping = rate;
1364         }
1365         if (set_shp) eni_vcc->tx = tx;
1366         DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping);
1367         return 0;
1368 }
1369
1370
1371 static int open_tx_first(struct atm_vcc *vcc)
1372 {
1373         ENI_VCC(vcc)->tx = NULL;
1374         if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0;
1375         ENI_VCC(vcc)->txing = 0;
1376         return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1);
1377 }
1378
1379
1380 static int open_tx_second(struct atm_vcc *vcc)
1381 {
1382         return 0; /* nothing to do */
1383 }
1384
1385
1386 static void close_tx(struct atm_vcc *vcc)
1387 {
1388         DECLARE_WAITQUEUE(wait,current);
1389         struct eni_dev *eni_dev;
1390         struct eni_vcc *eni_vcc;
1391
1392         eni_vcc = ENI_VCC(vcc);
1393         if (!eni_vcc->tx) return;
1394         eni_dev = ENI_DEV(vcc->dev);
1395         /* wait for TX queue to drain */
1396         DPRINTK("eni_close: waiting for TX ...\n");
1397         add_wait_queue(&eni_dev->tx_wait,&wait);
1398         set_current_state(TASK_UNINTERRUPTIBLE);
1399         for (;;) {
1400                 int txing;
1401
1402                 tasklet_disable(&eni_dev->task);
1403                 txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing;
1404                 tasklet_enable(&eni_dev->task);
1405                 if (!txing) break;
1406                 DPRINTK("%d TX left\n",eni_vcc->txing);
1407                 schedule();
1408                 set_current_state(TASK_UNINTERRUPTIBLE);
1409         }
1410         set_current_state(TASK_RUNNING);
1411         remove_wait_queue(&eni_dev->tx_wait,&wait);
1412         if (eni_vcc->tx != eni_dev->ubr) {
1413                 /*
1414                  * Looping a few times in here is probably far cheaper than
1415                  * keeping track of TX completions all the time, so let's poll
1416                  * a bit ...
1417                  */
1418                 while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) !=
1419                     eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index)))
1420                         schedule();
1421                 eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2);
1422                 eni_vcc->tx->send = NULL;
1423                 eni_dev->tx_bw += eni_vcc->tx->reserved;
1424         }
1425         eni_vcc->tx = NULL;
1426 }
1427
1428
1429 static int start_tx(struct atm_dev *dev)
1430 {
1431         struct eni_dev *eni_dev;
1432         int i;
1433
1434         eni_dev = ENI_DEV(dev);
1435         eni_dev->lost = 0;
1436         eni_dev->tx_bw = ATM_OC3_PCR;
1437         eni_dev->tx_mult = DEFAULT_TX_MULT;
1438         init_waitqueue_head(&eni_dev->tx_wait);
1439         eni_dev->ubr = NULL;
1440         skb_queue_head_init(&eni_dev->tx_queue);
1441         eni_out(0,MID_DMA_WR_TX);
1442         for (i = 0; i < NR_CHAN; i++) {
1443                 eni_dev->tx[i].send = NULL;
1444                 eni_dev->tx[i].index = i;
1445         }
1446         return 0;
1447 }
1448
1449
1450 /*--------------------------------- common ----------------------------------*/
1451
1452
1453 #if 0 /* may become useful again when tuning things */
1454
1455 static void foo(void)
1456 {
1457 printk(KERN_INFO
1458   "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n"
1459   "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n",
1460   tx_complete,dma_complete,queued,requeued,submitted,backlogged,
1461   rx_enqueued,rx_dequeued,putting,pushed);
1462 if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost);
1463 }
1464
1465 #endif
1466
1467
1468 static void bug_int(struct atm_dev *dev,unsigned long reason)
1469 {
1470         DPRINTK(">bug_int\n");
1471         if (reason & MID_DMA_ERR_ACK)
1472                 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1473                     "error\n",dev->number);
1474         if (reason & MID_TX_IDENT_MISM)
1475                 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident "
1476                     "mismatch\n",dev->number);
1477         if (reason & MID_TX_DMA_OVFL)
1478                 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1479                     "overflow\n",dev->number);
1480         EVENT("---dump ends here---\n",0,0);
1481         printk(KERN_NOTICE "---recent events---\n");
1482         event_dump();
1483 }
1484
1485
1486 static irqreturn_t eni_int(int irq,void *dev_id)
1487 {
1488         struct atm_dev *dev;
1489         struct eni_dev *eni_dev;
1490         u32 reason;
1491
1492         DPRINTK(">eni_int\n");
1493         dev = dev_id;
1494         eni_dev = ENI_DEV(dev);
1495         reason = eni_in(MID_ISA);
1496         DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason);
1497         /*
1498          * Must handle these two right now, because reading ISA doesn't clear
1499          * them, so they re-occur and we never make it to the tasklet. Since
1500          * they're rare, we don't mind the occasional invocation of eni_tasklet
1501          * with eni_dev->events == 0.
1502          */
1503         if (reason & MID_STAT_OVFL) {
1504                 EVENT("stat overflow\n",0,0);
1505                 eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH;
1506         }
1507         if (reason & MID_SUNI_INT) {
1508                 EVENT("SUNI int\n",0,0);
1509                 dev->phy->interrupt(dev);
1510 #if 0
1511                 foo();
1512 #endif
1513         }
1514         spin_lock(&eni_dev->lock);
1515         eni_dev->events |= reason;
1516         spin_unlock(&eni_dev->lock);
1517         tasklet_schedule(&eni_dev->task);
1518         return IRQ_HANDLED;
1519 }
1520
1521
1522 static void eni_tasklet(unsigned long data)
1523 {
1524         struct atm_dev *dev = (struct atm_dev *) data;
1525         struct eni_dev *eni_dev = ENI_DEV(dev);
1526         unsigned long flags;
1527         u32 events;
1528
1529         DPRINTK("eni_tasklet (dev %p)\n",dev);
1530         spin_lock_irqsave(&eni_dev->lock,flags);
1531         events = xchg(&eni_dev->events,0);
1532         spin_unlock_irqrestore(&eni_dev->lock,flags);
1533         if (events & MID_RX_DMA_COMPLETE) {
1534                 EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0);
1535                 dequeue_rx(dev);
1536                 EVENT("dequeue_rx done, starting poll_rx\n",0,0);
1537                 poll_rx(dev);
1538                 EVENT("poll_rx done\n",0,0);
1539                 /* poll_tx ? */
1540         }
1541         if (events & MID_SERVICE) {
1542                 EVENT("INT: service, starting get_service\n",0,0);
1543                 get_service(dev);
1544                 EVENT("get_service done, starting poll_rx\n",0,0);
1545                 poll_rx(dev);
1546                 EVENT("poll_rx done\n",0,0);
1547         }
1548         if (events & MID_TX_DMA_COMPLETE) {
1549                 EVENT("INT: TX DMA COMPLETE\n",0,0);
1550                 dequeue_tx(dev);
1551         }
1552         if (events & MID_TX_COMPLETE) {
1553                 EVENT("INT: TX COMPLETE\n",0,0);
1554                 tx_complete++;
1555                 wake_up(&eni_dev->tx_wait);
1556                 /* poll_rx ? */
1557         }
1558         if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) {
1559                 EVENT("bug interrupt\n",0,0);
1560                 bug_int(dev,events);
1561         }
1562         poll_tx(dev);
1563 }
1564
1565
1566 /*--------------------------------- entries ---------------------------------*/
1567
1568
1569 static char * const media_name[] = {
1570     "MMF", "SMF", "MMF", "03?", /*  0- 3 */
1571     "UTP", "05?", "06?", "07?", /*  4- 7 */
1572     "TAXI","09?", "10?", "11?", /*  8-11 */
1573     "12?", "13?", "14?", "15?", /* 12-15 */
1574     "MMF", "SMF", "18?", "19?", /* 16-19 */
1575     "UTP", "21?", "22?", "23?", /* 20-23 */
1576     "24?", "25?", "26?", "27?", /* 24-27 */
1577     "28?", "29?", "30?", "31?"  /* 28-31 */
1578 };
1579
1580
1581 #define SET_SEPROM \
1582   ({ if (!error && !pci_error) { \
1583     pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \
1584     udelay(10); /* 10 usecs */ \
1585   } })
1586 #define GET_SEPROM \
1587   ({ if (!error && !pci_error) { \
1588     pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \
1589     udelay(10); /* 10 usecs */ \
1590   } })
1591
1592
1593 static int get_esi_asic(struct atm_dev *dev)
1594 {
1595         struct eni_dev *eni_dev;
1596         unsigned char tonga;
1597         int error,failed,pci_error;
1598         int address,i,j;
1599
1600         eni_dev = ENI_DEV(dev);
1601         error = pci_error = 0;
1602         tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK;
1603         SET_SEPROM;
1604         for (i = 0; i < ESI_LEN && !error && !pci_error; i++) {
1605                 /* start operation */
1606                 tonga |= SEPROM_DATA;
1607                 SET_SEPROM;
1608                 tonga |= SEPROM_CLK;
1609                 SET_SEPROM;
1610                 tonga &= ~SEPROM_DATA;
1611                 SET_SEPROM;
1612                 tonga &= ~SEPROM_CLK;
1613                 SET_SEPROM;
1614                 /* send address */
1615                 address = ((i+SEPROM_ESI_BASE) << 1)+1;
1616                 for (j = 7; j >= 0; j--) {
1617                         tonga = (address >> j) & 1 ? tonga | SEPROM_DATA :
1618                             tonga & ~SEPROM_DATA;
1619                         SET_SEPROM;
1620                         tonga |= SEPROM_CLK;
1621                         SET_SEPROM;
1622                         tonga &= ~SEPROM_CLK;
1623                         SET_SEPROM;
1624                 }
1625                 /* get ack */
1626                 tonga |= SEPROM_DATA;
1627                 SET_SEPROM;
1628                 tonga |= SEPROM_CLK;
1629                 SET_SEPROM;
1630                 GET_SEPROM;
1631                 failed = tonga & SEPROM_DATA;
1632                 tonga &= ~SEPROM_CLK;
1633                 SET_SEPROM;
1634                 tonga |= SEPROM_DATA;
1635                 SET_SEPROM;
1636                 if (failed) error = -EIO;
1637                 else {
1638                         dev->esi[i] = 0;
1639                         for (j = 7; j >= 0; j--) {
1640                                 dev->esi[i] <<= 1;
1641                                 tonga |= SEPROM_DATA;
1642                                 SET_SEPROM;
1643                                 tonga |= SEPROM_CLK;
1644                                 SET_SEPROM;
1645                                 GET_SEPROM;
1646                                 if (tonga & SEPROM_DATA) dev->esi[i] |= 1;
1647                                 tonga &= ~SEPROM_CLK;
1648                                 SET_SEPROM;
1649                                 tonga |= SEPROM_DATA;
1650                                 SET_SEPROM;
1651                         }
1652                         /* get ack */
1653                         tonga |= SEPROM_DATA;
1654                         SET_SEPROM;
1655                         tonga |= SEPROM_CLK;
1656                         SET_SEPROM;
1657                         GET_SEPROM;
1658                         if (!(tonga & SEPROM_DATA)) error = -EIO;
1659                         tonga &= ~SEPROM_CLK;
1660                         SET_SEPROM;
1661                         tonga |= SEPROM_DATA;
1662                         SET_SEPROM;
1663                 }
1664                 /* stop operation */
1665                 tonga &= ~SEPROM_DATA;
1666                 SET_SEPROM;
1667                 tonga |= SEPROM_CLK;
1668                 SET_SEPROM;
1669                 tonga |= SEPROM_DATA;
1670                 SET_SEPROM;
1671         }
1672         if (pci_error) {
1673                 printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI "
1674                     "(0x%02x)\n",dev->number,pci_error);
1675                 error = -EIO;
1676         }
1677         return error;
1678 }
1679
1680
1681 #undef SET_SEPROM
1682 #undef GET_SEPROM
1683
1684
1685 static int get_esi_fpga(struct atm_dev *dev, void __iomem *base)
1686 {
1687         void __iomem *mac_base;
1688         int i;
1689
1690         mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom);
1691         for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3));
1692         return 0;
1693 }
1694
1695
1696 static int eni_do_init(struct atm_dev *dev)
1697 {
1698         struct midway_eprom __iomem *eprom;
1699         struct eni_dev *eni_dev;
1700         struct pci_dev *pci_dev;
1701         unsigned long real_base;
1702         void __iomem *base;
1703         int error,i,last;
1704
1705         DPRINTK(">eni_init\n");
1706         dev->ci_range.vpi_bits = 0;
1707         dev->ci_range.vci_bits = NR_VCI_LD;
1708         dev->link_rate = ATM_OC3_PCR;
1709         eni_dev = ENI_DEV(dev);
1710         pci_dev = eni_dev->pci_dev;
1711         real_base = pci_resource_start(pci_dev, 0);
1712         eni_dev->irq = pci_dev->irq;
1713         if ((error = pci_write_config_word(pci_dev,PCI_COMMAND,
1714             PCI_COMMAND_MEMORY |
1715             (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1716                 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory "
1717                     "(0x%02x)\n",dev->number,error);
1718                 return -EIO;
1719         }
1720         printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,",
1721             dev->number,pci_dev->revision,real_base,eni_dev->irq);
1722         if (!(base = ioremap(real_base,MAP_MAX_SIZE))) {
1723                 printk("\n");
1724                 printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page "
1725                     "mapping\n",dev->number);
1726                 return -ENOMEM;
1727         }
1728         eni_dev->ioaddr = base;
1729         eni_dev->base_diff = real_base - (unsigned long) base;
1730         /* id may not be present in ASIC Tonga boards - check this @@@ */
1731         if (!eni_dev->asic) {
1732                 eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom));
1733                 if (readl(&eprom->magic) != ENI155_MAGIC) {
1734                         printk("\n");
1735                         printk(KERN_ERR DEV_LABEL
1736                                "(itf %d): bad magic - expected 0x%x, got 0x%x\n",
1737                                dev->number, ENI155_MAGIC,
1738                                (unsigned)readl(&eprom->magic));
1739                         error = -EINVAL;
1740                         goto unmap;
1741                 }
1742         }
1743         eni_dev->phy = base+PHY_BASE;
1744         eni_dev->reg = base+REG_BASE;
1745         eni_dev->ram = base+RAM_BASE;
1746         last = MAP_MAX_SIZE-RAM_BASE;
1747         for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) {
1748                 writel(0x55555555,eni_dev->ram+i);
1749                 if (readl(eni_dev->ram+i) != 0x55555555) last = i;
1750                 else {
1751                         writel(0xAAAAAAAA,eni_dev->ram+i);
1752                         if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i;
1753                         else writel(i,eni_dev->ram+i);
1754                 }
1755         }
1756         for (i = 0; i < last; i += RAM_INCREMENT)
1757                 if (readl(eni_dev->ram+i) != i) break;
1758         eni_dev->mem = i;
1759         memset_io(eni_dev->ram,0,eni_dev->mem);
1760         /* TODO: should shrink allocation now */
1761         printk("mem=%dkB (",eni_dev->mem >> 10);
1762         /* TODO: check for non-SUNI, check for TAXI ? */
1763         if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) {
1764                 printk(")\n");
1765                 printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n",
1766                     dev->number,(unsigned) eni_in(MID_RES_ID_MCON));
1767                 error = -EINVAL;
1768                 goto unmap;
1769         }
1770         error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base);
1771         if (error)
1772                 goto unmap;
1773         for (i = 0; i < ESI_LEN; i++)
1774                 printk("%s%02X",i ? "-" : "",dev->esi[i]);
1775         printk(")\n");
1776         printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number,
1777             eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA",
1778             media_name[eni_in(MID_RES_ID_MCON) & DAUGHTER_ID]);
1779
1780         error = suni_init(dev);
1781         if (error)
1782                 goto unmap;
1783 out:
1784         return error;
1785 unmap:
1786         iounmap(base);
1787         goto out;
1788 }
1789
1790 static void eni_do_release(struct atm_dev *dev)
1791 {
1792         struct eni_dev *ed = ENI_DEV(dev);
1793
1794         dev->phy->stop(dev);
1795         dev->phy = NULL;
1796         iounmap(ed->ioaddr);
1797 }
1798
1799 static int eni_start(struct atm_dev *dev)
1800 {
1801         struct eni_dev *eni_dev;
1802
1803         void __iomem *buf;
1804         unsigned long buffer_mem;
1805         int error;
1806
1807         DPRINTK(">eni_start\n");
1808         eni_dev = ENI_DEV(dev);
1809         if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) {
1810                 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
1811                     dev->number,eni_dev->irq);
1812                 error = -EAGAIN;
1813                 goto out;
1814         }
1815         pci_set_master(eni_dev->pci_dev);
1816         if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND,
1817             PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
1818             (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1819                 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+"
1820                     "master (0x%02x)\n",dev->number,error);
1821                 goto free_irq;
1822         }
1823         if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,
1824             END_SWAP_DMA))) {
1825                 printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap "
1826                     "(0x%02x)\n",dev->number,error);
1827                 goto free_irq;
1828         }
1829         /* determine addresses of internal tables */
1830         eni_dev->vci = eni_dev->ram;
1831         eni_dev->rx_dma = eni_dev->ram+NR_VCI*16;
1832         eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8;
1833         eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8;
1834         buf = eni_dev->service+NR_SERVICE*4;
1835         DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n",
1836              eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma,
1837              eni_dev->service,buf);
1838         spin_lock_init(&eni_dev->lock);
1839         tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev);
1840         eni_dev->events = 0;
1841         /* initialize memory management */
1842         buffer_mem = eni_dev->mem - (buf - eni_dev->ram);
1843         eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2;
1844         eni_dev->free_list = kmalloc_array(eni_dev->free_list_size + 1,
1845                                            sizeof(*eni_dev->free_list),
1846                                            GFP_KERNEL);
1847         if (!eni_dev->free_list) {
1848                 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
1849                     dev->number);
1850                 error = -ENOMEM;
1851                 goto free_irq;
1852         }
1853         eni_dev->free_len = 0;
1854         eni_put_free(eni_dev,buf,buffer_mem);
1855         memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */
1856         /*
1857          * byte_addr  free (k)
1858          * 0x00000000     512  VCI table
1859          * 0x00004000     496  RX DMA
1860          * 0x00005000     492  TX DMA
1861          * 0x00006000     488  service list
1862          * 0x00007000     484  buffers
1863          * 0x00080000       0  end (512kB)
1864          */
1865         eni_out(0xffffffff,MID_IE);
1866         error = start_tx(dev);
1867         if (error) goto free_list;
1868         error = start_rx(dev);
1869         if (error) goto free_list;
1870         error = dev->phy->start(dev);
1871         if (error) goto free_list;
1872         eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) |
1873             MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE,
1874             MID_MC_S);
1875             /* Tonga uses SBus INTReq1 */
1876         (void) eni_in(MID_ISA); /* clear Midway interrupts */
1877         return 0;
1878
1879 free_list:
1880         kfree(eni_dev->free_list);
1881
1882 free_irq:
1883         free_irq(eni_dev->irq, dev);
1884
1885 out:
1886         return error;
1887 }
1888
1889
1890 static void eni_close(struct atm_vcc *vcc)
1891 {
1892         DPRINTK(">eni_close\n");
1893         if (!ENI_VCC(vcc)) return;
1894         clear_bit(ATM_VF_READY,&vcc->flags);
1895         close_rx(vcc);
1896         close_tx(vcc);
1897         DPRINTK("eni_close: done waiting\n");
1898         /* deallocate memory */
1899         kfree(ENI_VCC(vcc));
1900         vcc->dev_data = NULL;
1901         clear_bit(ATM_VF_ADDR,&vcc->flags);
1902         /*foo();*/
1903 }
1904
1905
1906 static int eni_open(struct atm_vcc *vcc)
1907 {
1908         struct eni_vcc *eni_vcc;
1909         int error;
1910         short vpi = vcc->vpi;
1911         int vci = vcc->vci;
1912
1913         DPRINTK(">eni_open\n");
1914         EVENT("eni_open\n",0,0);
1915         if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1916                 vcc->dev_data = NULL;
1917         if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
1918                 set_bit(ATM_VF_ADDR,&vcc->flags);
1919         if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5)
1920                 return -EINVAL;
1921         DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi,
1922             vcc->vci);
1923         if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
1924                 eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL);
1925                 if (!eni_vcc) return -ENOMEM;
1926                 vcc->dev_data = eni_vcc;
1927                 eni_vcc->tx = NULL; /* for eni_close after open_rx */
1928                 if ((error = open_rx_first(vcc))) {
1929                         eni_close(vcc);
1930                         return error;
1931                 }
1932                 if ((error = open_tx_first(vcc))) {
1933                         eni_close(vcc);
1934                         return error;
1935                 }
1936         }
1937         if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0;
1938         if ((error = open_rx_second(vcc))) {
1939                 eni_close(vcc);
1940                 return error;
1941         }
1942         if ((error = open_tx_second(vcc))) {
1943                 eni_close(vcc);
1944                 return error;
1945         }
1946         set_bit(ATM_VF_READY,&vcc->flags);
1947         /* should power down SUNI while !ref_count @@@ */
1948         return 0;
1949 }
1950
1951
1952 static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs)
1953 {
1954         struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1955         struct eni_tx *tx = ENI_VCC(vcc)->tx;
1956         struct sk_buff *skb;
1957         int error,rate,rsv,shp;
1958
1959         if (qos->txtp.traffic_class == ATM_NONE) return 0;
1960         if (tx == eni_dev->ubr) return -EBADFD;
1961         rate = atm_pcr_goal(&qos->txtp);
1962         if (rate < 0) rate = -rate;
1963         rsv = shp = 0;
1964         if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1;
1965         if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1;
1966         if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1;
1967         if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1;
1968         if (!rsv && !shp) return 0;
1969         error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp);
1970         if (error) return error;
1971         if (shp && !(flgs & ATM_MF_IMMED)) return 0;
1972         /*
1973          * Walk through the send buffer and patch the rate information in all
1974          * segmentation buffer descriptors of this VCC.
1975          */
1976         tasklet_disable(&eni_dev->task);
1977         skb_queue_walk(&eni_dev->tx_queue, skb) {
1978                 void __iomem *dsc;
1979
1980                 if (ATM_SKB(skb)->vcc != vcc) continue;
1981                 dsc = tx->send+ENI_PRV_POS(skb)*4;
1982                 writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) |
1983                     (tx->prescaler << MID_SEG_PR_SHIFT) |
1984                     (tx->resolution << MID_SEG_RATE_SHIFT), dsc);
1985         }
1986         tasklet_enable(&eni_dev->task);
1987         return 0;
1988 }
1989
1990
1991 static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
1992 {
1993         struct eni_dev *eni_dev = ENI_DEV(dev);
1994
1995         if (cmd == ENI_MEMDUMP) {
1996                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1997                 printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d "
1998                     "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number);
1999                 dump(dev);
2000                 return 0;
2001         }
2002         if (cmd == ENI_SETMULT) {
2003                 struct eni_multipliers mult;
2004
2005                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
2006                 if (copy_from_user(&mult, arg,
2007                     sizeof(struct eni_multipliers)))
2008                         return -EFAULT;
2009                 if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) ||
2010                     mult.tx > 65536 || mult.rx > 65536)
2011                         return -EINVAL;
2012                 if (mult.tx) eni_dev->tx_mult = mult.tx;
2013                 if (mult.rx) eni_dev->rx_mult = mult.rx;
2014                 return 0;
2015         }
2016         if (cmd == ATM_SETCIRANGE) {
2017                 struct atm_cirange ci;
2018
2019                 if (copy_from_user(&ci, arg,sizeof(struct atm_cirange)))
2020                         return -EFAULT;
2021                 if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) &&
2022                     (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX))
2023                     return 0;
2024                 return -EINVAL;
2025         }
2026         if (!dev->phy->ioctl) return -ENOIOCTLCMD;
2027         return dev->phy->ioctl(dev,cmd,arg);
2028 }
2029
2030
2031 static int eni_getsockopt(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_setsockopt(struct atm_vcc *vcc,int level,int optname,
2039     void __user *optval,unsigned int optlen)
2040 {
2041         return -EINVAL;
2042 }
2043
2044
2045 static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb)
2046 {
2047         enum enq_res res;
2048
2049         DPRINTK(">eni_send\n");
2050         if (!ENI_VCC(vcc)->tx) {
2051                 if (vcc->pop) vcc->pop(vcc,skb);
2052                 else dev_kfree_skb(skb);
2053                 return -EINVAL;
2054         }
2055         if (!skb) {
2056                 printk(KERN_CRIT "!skb in eni_send ?\n");
2057                 if (vcc->pop) vcc->pop(vcc,skb);
2058                 return -EINVAL;
2059         }
2060         if (vcc->qos.aal == ATM_AAL0) {
2061                 if (skb->len != ATM_CELL_SIZE-1) {
2062                         if (vcc->pop) vcc->pop(vcc,skb);
2063                         else dev_kfree_skb(skb);
2064                         return -EINVAL;
2065                 }
2066                 *(u32 *) skb->data = htonl(*(u32 *) skb->data);
2067         }
2068         submitted++;
2069         ATM_SKB(skb)->vcc = vcc;
2070         tasklet_disable(&ENI_DEV(vcc->dev)->task);
2071         res = do_tx(skb);
2072         tasklet_enable(&ENI_DEV(vcc->dev)->task);
2073         if (res == enq_ok) return 0;
2074         skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb);
2075         backlogged++;
2076         tasklet_schedule(&ENI_DEV(vcc->dev)->task);
2077         return 0;
2078 }
2079
2080 static void eni_phy_put(struct atm_dev *dev,unsigned char value,
2081     unsigned long addr)
2082 {
2083         writel(value,ENI_DEV(dev)->phy+addr*4);
2084 }
2085
2086
2087
2088 static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr)
2089 {
2090         return readl(ENI_DEV(dev)->phy+addr*4);
2091 }
2092
2093
2094 static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page)
2095 {
2096         struct sock *s;
2097         static const char *signal[] = { "LOST","unknown","okay" };
2098         struct eni_dev *eni_dev = ENI_DEV(dev);
2099         struct atm_vcc *vcc;
2100         int left,i;
2101
2102         left = *pos;
2103         if (!left)
2104                 return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, "
2105                     "%d cps remaining\n",dev->number,signal[(int) dev->signal],
2106                     eni_dev->mem >> 10,eni_dev->tx_bw);
2107         if (!--left)
2108                 return sprintf(page,"%4sBursts: TX"
2109 #if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \
2110     !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \
2111     !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \
2112     !defined(CONFIG_ATM_ENI_BURST_TX_2W)
2113                     " none"
2114 #endif
2115 #ifdef CONFIG_ATM_ENI_BURST_TX_16W
2116                     " 16W"
2117 #endif
2118 #ifdef CONFIG_ATM_ENI_BURST_TX_8W
2119                     " 8W"
2120 #endif
2121 #ifdef CONFIG_ATM_ENI_BURST_TX_4W
2122                     " 4W"
2123 #endif
2124 #ifdef CONFIG_ATM_ENI_BURST_TX_2W
2125                     " 2W"
2126 #endif
2127                     ", RX"
2128 #if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \
2129     !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \
2130     !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \
2131     !defined(CONFIG_ATM_ENI_BURST_RX_2W)
2132                     " none"
2133 #endif
2134 #ifdef CONFIG_ATM_ENI_BURST_RX_16W
2135                     " 16W"
2136 #endif
2137 #ifdef CONFIG_ATM_ENI_BURST_RX_8W
2138                     " 8W"
2139 #endif
2140 #ifdef CONFIG_ATM_ENI_BURST_RX_4W
2141                     " 4W"
2142 #endif
2143 #ifdef CONFIG_ATM_ENI_BURST_RX_2W
2144                     " 2W"
2145 #endif
2146 #ifndef CONFIG_ATM_ENI_TUNE_BURST
2147                     " (default)"
2148 #endif
2149                     "\n","");
2150         if (!--left)
2151                 return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n",
2152                     "",eni_dev->tx_mult,eni_dev->rx_mult);
2153         for (i = 0; i < NR_CHAN; i++) {
2154                 struct eni_tx *tx = eni_dev->tx+i;
2155
2156                 if (!tx->send) continue;
2157                 if (!--left) {
2158                         return sprintf(page, "tx[%d]:    0x%lx-0x%lx "
2159                             "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i,
2160                             (unsigned long) (tx->send - eni_dev->ram),
2161                             tx->send-eni_dev->ram+tx->words*4-1,tx->words*4,
2162                             tx->reserved,tx->shaping,
2163                             tx == eni_dev->ubr ? " (UBR)" : "");
2164                 }
2165                 if (--left) continue;
2166                 return sprintf(page,"%10sbacklog %u packets\n","",
2167                     skb_queue_len(&tx->backlog));
2168         }
2169         read_lock(&vcc_sklist_lock);
2170         for(i = 0; i < VCC_HTABLE_SIZE; ++i) {
2171                 struct hlist_head *head = &vcc_hash[i];
2172
2173                 sk_for_each(s, head) {
2174                         struct eni_vcc *eni_vcc;
2175                         int length;
2176
2177                         vcc = atm_sk(s);
2178                         if (vcc->dev != dev)
2179                                 continue;
2180                         eni_vcc = ENI_VCC(vcc);
2181                         if (--left) continue;
2182                         length = sprintf(page,"vcc %4d: ",vcc->vci);
2183                         if (eni_vcc->rx) {
2184                                 length += sprintf(page+length, "0x%lx-0x%lx "
2185                                     "(%6ld bytes)",
2186                                     (unsigned long) (eni_vcc->recv - eni_dev->ram),
2187                                     eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1,
2188                                     eni_vcc->words*4);
2189                                 if (eni_vcc->tx) length += sprintf(page+length,", ");
2190                         }
2191                         if (eni_vcc->tx)
2192                                 length += sprintf(page+length,"tx[%d], txing %d bytes",
2193                                     eni_vcc->tx->index,eni_vcc->txing);
2194                         page[length] = '\n';
2195                         read_unlock(&vcc_sklist_lock);
2196                         return length+1;
2197                 }
2198         }
2199         read_unlock(&vcc_sklist_lock);
2200         for (i = 0; i < eni_dev->free_len; i++) {
2201                 struct eni_free *fe = eni_dev->free_list+i;
2202                 unsigned long offset;
2203
2204                 if (--left) continue;
2205                 offset = (unsigned long) eni_dev->ram+eni_dev->base_diff;
2206                 return sprintf(page,"free      %p-%p (%6d bytes)\n",
2207                     fe->start-offset,fe->start-offset+(1 << fe->order)-1,
2208                     1 << fe->order);
2209         }
2210         return 0;
2211 }
2212
2213
2214 static const struct atmdev_ops ops = {
2215         .open           = eni_open,
2216         .close          = eni_close,
2217         .ioctl          = eni_ioctl,
2218         .getsockopt     = eni_getsockopt,
2219         .setsockopt     = eni_setsockopt,
2220         .send           = eni_send,
2221         .phy_put        = eni_phy_put,
2222         .phy_get        = eni_phy_get,
2223         .change_qos     = eni_change_qos,
2224         .proc_read      = eni_proc_read
2225 };
2226
2227
2228 static int eni_init_one(struct pci_dev *pci_dev,
2229                         const struct pci_device_id *ent)
2230 {
2231         struct atm_dev *dev;
2232         struct eni_dev *eni_dev;
2233         struct eni_zero *zero;
2234         int rc;
2235
2236         rc = pci_enable_device(pci_dev);
2237         if (rc < 0)
2238                 goto out;
2239
2240         rc = dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(32));
2241         if (rc < 0)
2242                 goto out;
2243
2244         rc = -ENOMEM;
2245         eni_dev = kmalloc(sizeof(struct eni_dev), GFP_KERNEL);
2246         if (!eni_dev)
2247                 goto err_disable;
2248
2249         zero = &eni_dev->zero;
2250         zero->addr = dma_alloc_coherent(&pci_dev->dev,
2251                                         ENI_ZEROES_SIZE, &zero->dma, GFP_KERNEL);
2252         if (!zero->addr)
2253                 goto err_kfree;
2254
2255         dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL);
2256         if (!dev)
2257                 goto err_free_consistent;
2258
2259         dev->dev_data = eni_dev;
2260         pci_set_drvdata(pci_dev, dev);
2261         eni_dev->pci_dev = pci_dev;
2262         eni_dev->asic = ent->driver_data;
2263
2264         rc = eni_do_init(dev);
2265         if (rc < 0)
2266                 goto err_unregister;
2267
2268         rc = eni_start(dev);
2269         if (rc < 0)
2270                 goto err_eni_release;
2271
2272         eni_dev->more = eni_boards;
2273         eni_boards = dev;
2274 out:
2275         return rc;
2276
2277 err_eni_release:
2278         eni_do_release(dev);
2279 err_unregister:
2280         atm_dev_deregister(dev);
2281 err_free_consistent:
2282         dma_free_coherent(&pci_dev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2283 err_kfree:
2284         kfree(eni_dev);
2285 err_disable:
2286         pci_disable_device(pci_dev);
2287         goto out;
2288 }
2289
2290
2291 static const struct pci_device_id eni_pci_tbl[] = {
2292         { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_FPGA), 0 /* FPGA */ },
2293         { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_ASIC), 1 /* ASIC */ },
2294         { 0, }
2295 };
2296 MODULE_DEVICE_TABLE(pci,eni_pci_tbl);
2297
2298
2299 static void eni_remove_one(struct pci_dev *pdev)
2300 {
2301         struct atm_dev *dev = pci_get_drvdata(pdev);
2302         struct eni_dev *ed = ENI_DEV(dev);
2303         struct eni_zero *zero = &ed->zero;
2304
2305         eni_do_release(dev);
2306         atm_dev_deregister(dev);
2307         dma_free_coherent(&pdev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2308         kfree(ed);
2309         pci_disable_device(pdev);
2310 }
2311
2312
2313 static struct pci_driver eni_driver = {
2314         .name           = DEV_LABEL,
2315         .id_table       = eni_pci_tbl,
2316         .probe          = eni_init_one,
2317         .remove         = eni_remove_one,
2318 };
2319
2320
2321 static int __init eni_init(void)
2322 {
2323         struct sk_buff *skb; /* dummy for sizeof */
2324
2325         BUILD_BUG_ON(sizeof(skb->cb) < sizeof(struct eni_skb_prv));
2326         return pci_register_driver(&eni_driver);
2327 }
2328
2329
2330 module_init(eni_init);
2331 /* @@@ since exit routine not defined, this module can not be unloaded */
2332
2333 MODULE_LICENSE("GPL");