Version:  2.0.40 2.2.26 2.4.37 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19

Linux/drivers/atm/eni.c

  1 /* drivers/atm/eni.c - Efficient Networks ENI155P device driver */
  2  
  3 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
  4  
  5 
  6 #include <linux/module.h>
  7 #include <linux/kernel.h>
  8 #include <linux/mm.h>
  9 #include <linux/pci.h>
 10 #include <linux/errno.h>
 11 #include <linux/atm.h>
 12 #include <linux/atmdev.h>
 13 #include <linux/sonet.h>
 14 #include <linux/skbuff.h>
 15 #include <linux/time.h>
 16 #include <linux/delay.h>
 17 #include <linux/uio.h>
 18 #include <linux/init.h>
 19 #include <linux/atm_eni.h>
 20 #include <linux/bitops.h>
 21 #include <linux/slab.h>
 22 #include <asm/io.h>
 23 #include <linux/atomic.h>
 24 #include <asm/uaccess.h>
 25 #include <asm/string.h>
 26 #include <asm/byteorder.h>
 27 
 28 #include "tonga.h"
 29 #include "midway.h"
 30 #include "suni.h"
 31 #include "eni.h"
 32 
 33 #if !defined(__i386__) && !defined(__x86_64__)
 34 #ifndef ioremap_nocache
 35 #define ioremap_nocache(X,Y) ioremap(X,Y)
 36 #endif 
 37 #endif
 38 
 39 /*
 40  * TODO:
 41  *
 42  * Show stoppers
 43  *  none
 44  *
 45  * Minor
 46  *  - OAM support
 47  *  - fix bugs listed below
 48  */
 49 
 50 /*
 51  * KNOWN BUGS:
 52  *
 53  * - may run into JK-JK bug and deadlock
 54  * - should allocate UBR channel first
 55  * - buffer space allocation algorithm is stupid
 56  *   (RX: should be maxSDU+maxdelay*rate
 57  *    TX: should be maxSDU+min(maxSDU,maxdelay*rate) )
 58  * - doesn't support OAM cells
 59  * - eni_put_free may hang if not putting memory fragments that _complete_
 60  *   2^n block (never happens in real life, though)
 61  */
 62 
 63 
 64 #if 0
 65 #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
 66 #else
 67 #define DPRINTK(format,args...)
 68 #endif
 69 
 70 
 71 #ifndef CONFIG_ATM_ENI_TUNE_BURST
 72 #define CONFIG_ATM_ENI_BURST_TX_8W
 73 #define CONFIG_ATM_ENI_BURST_RX_4W
 74 #endif
 75 
 76 
 77 #ifndef CONFIG_ATM_ENI_DEBUG
 78 
 79 
 80 #define NULLCHECK(x)
 81 
 82 #define EVENT(s,a,b)
 83 
 84 
 85 static void event_dump(void)
 86 {
 87 }
 88 
 89 
 90 #else
 91 
 92 
 93 /* 
 94  * NULL pointer checking
 95  */
 96 
 97 #define NULLCHECK(x) \
 98         if ((unsigned long) (x) < 0x30) \
 99                 printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x))
100 
101 /*
102  * Very extensive activity logging. Greatly improves bug detection speed but
103  * costs a few Mbps if enabled.
104  */
105 
106 #define EV 64
107 
108 static const char *ev[EV];
109 static unsigned long ev_a[EV],ev_b[EV];
110 static int ec = 0;
111 
112 
113 static void EVENT(const char *s,unsigned long a,unsigned long b)
114 {
115         ev[ec] = s; 
116         ev_a[ec] = a;
117         ev_b[ec] = b;
118         ec = (ec+1) % EV;
119 }
120 
121 
122 static void event_dump(void)
123 {
124         int n,i;
125 
126         for (n = 0; n < EV; n++) {
127                 i = (ec+n) % EV;
128                 printk(KERN_NOTICE);
129                 printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]);
130         }
131 }
132 
133 
134 #endif /* CONFIG_ATM_ENI_DEBUG */
135 
136 
137 /*
138  * NExx   must not be equal at end
139  * EExx   may be equal at end
140  * xxPJOK verify validity of pointer jumps
141  * xxPMOK operating on a circular buffer of "c" words
142  */
143 
144 #define NEPJOK(a0,a1,b) \
145     ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1))
146 #define EEPJOK(a0,a1,b) \
147     ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1))
148 #define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b)
149 #define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b)
150 
151 
152 static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0,
153   backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0,
154   putting = 0;
155 
156 static struct atm_dev *eni_boards = NULL;
157 
158 /* Read/write registers on card */
159 #define eni_in(r)       readl(eni_dev->reg+(r)*4)
160 #define eni_out(v,r)    writel((v),eni_dev->reg+(r)*4)
161 
162 
163 /*-------------------------------- utilities --------------------------------*/
164 
165 
166 static void dump_mem(struct eni_dev *eni_dev)
167 {
168         int i;
169 
170         for (i = 0; i < eni_dev->free_len; i++)
171                 printk(KERN_DEBUG "  %d: %p %d\n",i,
172                     eni_dev->free_list[i].start,
173                     1 << eni_dev->free_list[i].order);
174 }
175 
176 
177 static void dump(struct atm_dev *dev)
178 {
179         struct eni_dev *eni_dev;
180 
181         int i;
182 
183         eni_dev = ENI_DEV(dev);
184         printk(KERN_NOTICE "Free memory\n");
185         dump_mem(eni_dev);
186         printk(KERN_NOTICE "TX buffers\n");
187         for (i = 0; i < NR_CHAN; i++)
188                 if (eni_dev->tx[i].send)
189                         printk(KERN_NOTICE "  TX %d @ %p: %ld\n",i,
190                             eni_dev->tx[i].send,eni_dev->tx[i].words*4);
191         printk(KERN_NOTICE "RX buffers\n");
192         for (i = 0; i < 1024; i++)
193                 if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx)
194                         printk(KERN_NOTICE "  RX %d @ %p: %ld\n",i,
195                             ENI_VCC(eni_dev->rx_map[i])->recv,
196                             ENI_VCC(eni_dev->rx_map[i])->words*4);
197         printk(KERN_NOTICE "----\n");
198 }
199 
200 
201 static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start,
202     unsigned long size)
203 {
204         struct eni_free *list;
205         int len,order;
206 
207         DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size);
208         start += eni_dev->base_diff;
209         list = eni_dev->free_list;
210         len = eni_dev->free_len;
211         while (size) {
212                 if (len >= eni_dev->free_list_size) {
213                         printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n",
214                             start,size);
215                         break;
216                 }
217                 for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++);
218                 if (MID_MIN_BUF_SIZE > (1 << order)) {
219                         printk(KERN_CRIT "eni_put_free: order %d too small\n",
220                             order);
221                         break;
222                 }
223                 list[len].start = (void __iomem *) start;
224                 list[len].order = order;
225                 len++;
226                 start += 1 << order;
227                 size -= 1 << order;
228         }
229         eni_dev->free_len = len;
230         /*dump_mem(eni_dev);*/
231 }
232 
233 
234 static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size)
235 {
236         struct eni_free *list;
237         void __iomem *start;
238         int len,i,order,best_order,index;
239 
240         list = eni_dev->free_list;
241         len = eni_dev->free_len;
242         if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE;
243         if (*size > MID_MAX_BUF_SIZE) return NULL;
244         for (order = 0; (1 << order) < *size; order++);
245         DPRINTK("trying: %ld->%d\n",*size,order);
246         best_order = 65; /* we don't have more than 2^64 of anything ... */
247         index = 0; /* silence GCC */
248         for (i = 0; i < len; i++)
249                 if (list[i].order == order) {
250                         best_order = order;
251                         index = i;
252                         break;
253                 }
254                 else if (best_order > list[i].order && list[i].order > order) {
255                                 best_order = list[i].order;
256                                 index = i;
257                         }
258         if (best_order == 65) return NULL;
259         start = list[index].start-eni_dev->base_diff;
260         list[index] = list[--len];
261         eni_dev->free_len = len;
262         *size = 1 << order;
263         eni_put_free(eni_dev,start+*size,(1 << best_order)-*size);
264         DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start);
265         memset_io(start,0,*size);       /* never leak data */
266         /*dump_mem(eni_dev);*/
267         return start;
268 }
269 
270 
271 static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start,
272     unsigned long size)
273 {
274         struct eni_free *list;
275         int len,i,order;
276 
277         start += eni_dev->base_diff;
278         list = eni_dev->free_list;
279         len = eni_dev->free_len;
280         for (order = -1; size; order++) size >>= 1;
281         DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order);
282         for (i = 0; i < len; i++)
283                 if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) &&
284                     list[i].order == order) {
285                         DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i,
286                             list[i].start,start,1 << order,list[i].order,order);
287                         list[i] = list[--len];
288                         start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order));
289                         order++;
290                         i = -1;
291                         continue;
292                 }
293         if (len >= eni_dev->free_list_size) {
294                 printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start,
295                     order);
296                 return;
297         }
298         list[len].start = start;
299         list[len].order = order;
300         eni_dev->free_len = len+1;
301         /*dump_mem(eni_dev);*/
302 }
303 
304 
305 /*----------------------------------- RX ------------------------------------*/
306 
307 
308 #define ENI_VCC_NOS ((struct atm_vcc *) 1)
309 
310 
311 static void rx_ident_err(struct atm_vcc *vcc)
312 {
313         struct atm_dev *dev;
314         struct eni_dev *eni_dev;
315         struct eni_vcc *eni_vcc;
316 
317         dev = vcc->dev;
318         eni_dev = ENI_DEV(dev);
319         /* immediately halt adapter */
320         eni_out(eni_in(MID_MC_S) &
321             ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S);
322         /* dump useful information */
323         eni_vcc = ENI_VCC(vcc);
324         printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident "
325             "mismatch\n",dev->number);
326         printk(KERN_ALERT "  VCI %d, rxing %d, words %ld\n",vcc->vci,
327             eni_vcc->rxing,eni_vcc->words);
328         printk(KERN_ALERT "  host descr 0x%lx, rx pos 0x%lx, descr value "
329             "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos,
330             (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4));
331         printk(KERN_ALERT "  last %p, servicing %d\n",eni_vcc->last,
332             eni_vcc->servicing);
333         EVENT("---dump ends here---\n",0,0);
334         printk(KERN_NOTICE "---recent events---\n");
335         event_dump();
336         ENI_DEV(dev)->fast = NULL; /* really stop it */
337         ENI_DEV(dev)->slow = NULL;
338         skb_queue_head_init(&ENI_DEV(dev)->rx_queue);
339 }
340 
341 
342 static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb,
343     unsigned long skip,unsigned long size,unsigned long eff)
344 {
345         struct eni_dev *eni_dev;
346         struct eni_vcc *eni_vcc;
347         u32 dma_rd,dma_wr;
348         u32 dma[RX_DMA_BUF*2];
349         dma_addr_t paddr;
350         unsigned long here;
351         int i,j;
352 
353         eni_dev = ENI_DEV(vcc->dev);
354         eni_vcc = ENI_VCC(vcc);
355         paddr = 0; /* GCC, shut up */
356         if (skb) {
357                 paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len,
358                     PCI_DMA_FROMDEVICE);
359                 if (pci_dma_mapping_error(eni_dev->pci_dev, paddr))
360                         goto dma_map_error;
361                 ENI_PRV_PADDR(skb) = paddr;
362                 if (paddr & 3)
363                         printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has "
364                             "mis-aligned RX data (0x%lx)\n",vcc->dev->number,
365                             vcc->vci,(unsigned long) paddr);
366                 ENI_PRV_SIZE(skb) = size+skip;
367                     /* PDU plus descriptor */
368                 ATM_SKB(skb)->vcc = vcc;
369         }
370         j = 0;
371         if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */
372                 here = (eni_vcc->descr+skip) & (eni_vcc->words-1);
373                 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci
374                     << MID_DMA_VCI_SHIFT) | MID_DT_JK;
375                 j++;
376         }
377         here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1);
378         if (!eff) size += skip;
379         else {
380                 unsigned long words;
381 
382                 if (!size) {
383                         DPRINTK("strange things happen ...\n");
384                         EVENT("strange things happen ... (skip=%ld,eff=%ld)\n",
385                             size,eff);
386                 }
387                 words = eff;
388                 if (paddr & 15) {
389                         unsigned long init;
390 
391                         init = 4-((paddr & 15) >> 2);
392                         if (init > words) init = words;
393                         dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
394                             (vcc->vci << MID_DMA_VCI_SHIFT);
395                         dma[j++] = paddr;
396                         paddr += init << 2;
397                         words -= init;
398                 }
399 #ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */
400                 if (words & ~15) {
401                         dma[j++] = MID_DT_16W | ((words >> 4) <<
402                             MID_DMA_COUNT_SHIFT) | (vcc->vci <<
403                             MID_DMA_VCI_SHIFT);
404                         dma[j++] = paddr;
405                         paddr += (words & ~15) << 2;
406                         words &= 15;
407                 }
408 #endif
409 #ifdef CONFIG_ATM_ENI_BURST_RX_8W  /* works only with *some* PCI chipsets ... */
410                 if (words & ~7) {
411                         dma[j++] = MID_DT_8W | ((words >> 3) <<
412                             MID_DMA_COUNT_SHIFT) | (vcc->vci <<
413                             MID_DMA_VCI_SHIFT);
414                         dma[j++] = paddr;
415                         paddr += (words & ~7) << 2;
416                         words &= 7;
417                 }
418 #endif
419 #ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */
420                 if (words & ~3) {
421                         dma[j++] = MID_DT_4W | ((words >> 2) <<
422                             MID_DMA_COUNT_SHIFT) | (vcc->vci <<
423                             MID_DMA_VCI_SHIFT);
424                         dma[j++] = paddr;
425                         paddr += (words & ~3) << 2;
426                         words &= 3;
427                 }
428 #endif
429 #ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */
430                 if (words & ~1) {
431                         dma[j++] = MID_DT_2W | ((words >> 1) <<
432                             MID_DMA_COUNT_SHIFT) | (vcc->vci <<
433                             MID_DMA_VCI_SHIFT);
434                         dma[j++] = paddr;
435                         paddr += (words & ~1) << 2;
436                         words &= 1;
437                 }
438 #endif
439                 if (words) {
440                         dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT)
441                             | (vcc->vci << MID_DMA_VCI_SHIFT);
442                         dma[j++] = paddr;
443                 }
444         }
445         if (size != eff) {
446                 dma[j++] = (here << MID_DMA_COUNT_SHIFT) |
447                     (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK;
448                 j++;
449         }
450         if (!j || j > 2*RX_DMA_BUF) {
451                 printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n");
452                 goto trouble;
453         }
454         dma[j-2] |= MID_DMA_END;
455         j = j >> 1;
456         dma_wr = eni_in(MID_DMA_WR_RX);
457         dma_rd = eni_in(MID_DMA_RD_RX);
458         /*
459          * Can I move the dma_wr pointer by 2j+1 positions without overwriting
460          * data that hasn't been read (position of dma_rd) yet ?
461          */
462         if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */
463                 printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n",
464                     vcc->dev->number);
465                 goto trouble;
466         }
467         for (i = 0; i < j; i++) {
468                 writel(dma[i*2],eni_dev->rx_dma+dma_wr*8);
469                 writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4);
470                 dma_wr = (dma_wr+1) & (NR_DMA_RX-1);
471         }
472         if (skb) {
473                 ENI_PRV_POS(skb) = eni_vcc->descr+size+1;
474                 skb_queue_tail(&eni_dev->rx_queue,skb);
475                 eni_vcc->last = skb;
476 rx_enqueued++;
477         }
478         eni_vcc->descr = here;
479         eni_out(dma_wr,MID_DMA_WR_RX);
480         return 0;
481 
482 trouble:
483         if (paddr)
484                 pci_unmap_single(eni_dev->pci_dev,paddr,skb->len,
485                     PCI_DMA_FROMDEVICE);
486 dma_map_error:
487         if (skb) dev_kfree_skb_irq(skb);
488         return -1;
489 }
490 
491 
492 static void discard(struct atm_vcc *vcc,unsigned long size)
493 {
494         struct eni_vcc *eni_vcc;
495 
496         eni_vcc = ENI_VCC(vcc);
497         EVENT("discard (size=%ld)\n",size,0);
498         while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0);
499             /* could do a full fallback, but that might be more expensive */
500         if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1;
501         else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1);
502 }
503 
504 
505 /*
506  * TODO: should check whether direct copies (without DMA setup, dequeuing on
507  * interrupt, etc.) aren't much faster for AAL0
508  */
509 
510 static int rx_aal0(struct atm_vcc *vcc)
511 {
512         struct eni_vcc *eni_vcc;
513         unsigned long descr;
514         unsigned long length;
515         struct sk_buff *skb;
516 
517         DPRINTK(">rx_aal0\n");
518         eni_vcc = ENI_VCC(vcc);
519         descr = readl(eni_vcc->recv+eni_vcc->descr*4);
520         if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
521                 rx_ident_err(vcc);
522                 return 1;
523         }
524         if (descr & MID_RED_T) {
525                 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
526                     vcc->dev->number);
527                 length = 0;
528                 atomic_inc(&vcc->stats->rx_err);
529         }
530         else {
531                 length = ATM_CELL_SIZE-1; /* no HEC */
532         }
533         skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL;
534         if (!skb) {
535                 discard(vcc,length >> 2);
536                 return 0;
537         }
538         skb_put(skb,length);
539         skb->tstamp = eni_vcc->timestamp;
540         DPRINTK("got len %ld\n",length);
541         if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1;
542         eni_vcc->rxing++;
543         return 0;
544 }
545 
546 
547 static int rx_aal5(struct atm_vcc *vcc)
548 {
549         struct eni_vcc *eni_vcc;
550         unsigned long descr;
551         unsigned long size,eff,length;
552         struct sk_buff *skb;
553 
554         EVENT("rx_aal5\n",0,0);
555         DPRINTK(">rx_aal5\n");
556         eni_vcc = ENI_VCC(vcc);
557         descr = readl(eni_vcc->recv+eni_vcc->descr*4);
558         if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
559                 rx_ident_err(vcc);
560                 return 1;
561         }
562         if (descr & (MID_RED_T | MID_RED_CRC_ERR)) {
563                 if (descr & MID_RED_T) {
564                         EVENT("empty cell (descr=0x%lx)\n",descr,0);
565                         DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
566                             vcc->dev->number);
567                         size = 0;
568                 }
569                 else {
570                         static unsigned long silence = 0;
571 
572                         if (time_after(jiffies, silence) || silence == 0) {
573                                 printk(KERN_WARNING DEV_LABEL "(itf %d): "
574                                     "discarding PDU(s) with CRC error\n",
575                                     vcc->dev->number);
576                                 silence = (jiffies+2*HZ)|1;
577                         }
578                         size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
579                         EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr,
580                             size);
581                 }
582                 eff = length = 0;
583                 atomic_inc(&vcc->stats->rx_err);
584         }
585         else {
586                 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
587                 DPRINTK("size=%ld\n",size);
588                 length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) &
589                     (eni_vcc->words-1)))*4) & 0xffff;
590                                 /* -trailer(2)+header(1) */
591                 if (length && length <= (size << 2)-8 && length <=
592                   ATM_MAX_AAL5_PDU) eff = (length+3) >> 2;
593                 else {                           /* ^ trailer length (8) */
594                         EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr,
595                             length);
596                         printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU "
597                             "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n",
598                             vcc->dev->number,vcc->vci,length,size << 2,descr);
599                         length = eff = 0;
600                         atomic_inc(&vcc->stats->rx_err);
601                 }
602         }
603         skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL;
604         if (!skb) {
605                 discard(vcc,size);
606                 return 0;
607         }
608         skb_put(skb,length);
609         DPRINTK("got len %ld\n",length);
610         if (do_rx_dma(vcc,skb,1,size,eff)) return 1;
611         eni_vcc->rxing++;
612         return 0;
613 }
614 
615 
616 static inline int rx_vcc(struct atm_vcc *vcc)
617 {
618         void __iomem *vci_dsc;
619         unsigned long tmp;
620         struct eni_vcc *eni_vcc;
621 
622         eni_vcc = ENI_VCC(vcc);
623         vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16;
624         EVENT("rx_vcc(1)\n",0,0);
625         while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >>
626             MID_VCI_DESCR_SHIFT)) {
627                 EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n",
628                     eni_vcc->descr,tmp);
629                 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
630                     (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
631                     MID_VCI_DESCR_SHIFT));
632                 if (ENI_VCC(vcc)->rx(vcc)) return 1;
633         }
634         /* clear IN_SERVICE flag */
635         writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc);
636         /*
637          * If new data has arrived between evaluating the while condition and
638          * clearing IN_SERVICE, we wouldn't be notified until additional data
639          * follows. So we have to loop again to be sure.
640          */
641         EVENT("rx_vcc(3)\n",0,0);
642         while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR)
643             >> MID_VCI_DESCR_SHIFT)) {
644                 EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n",
645                     eni_vcc->descr,tmp);
646                 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
647                     (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
648                     MID_VCI_DESCR_SHIFT));
649                 if (ENI_VCC(vcc)->rx(vcc)) return 1;
650         }
651         return 0;
652 }
653 
654 
655 static void poll_rx(struct atm_dev *dev)
656 {
657         struct eni_dev *eni_dev;
658         struct atm_vcc *curr;
659 
660         eni_dev = ENI_DEV(dev);
661         while ((curr = eni_dev->fast)) {
662                 EVENT("poll_rx.fast\n",0,0);
663                 if (rx_vcc(curr)) return;
664                 eni_dev->fast = ENI_VCC(curr)->next;
665                 ENI_VCC(curr)->next = ENI_VCC_NOS;
666                 barrier();
667                 ENI_VCC(curr)->servicing--;
668         }
669         while ((curr = eni_dev->slow)) {
670                 EVENT("poll_rx.slow\n",0,0);
671                 if (rx_vcc(curr)) return;
672                 eni_dev->slow = ENI_VCC(curr)->next;
673                 ENI_VCC(curr)->next = ENI_VCC_NOS;
674                 barrier();
675                 ENI_VCC(curr)->servicing--;
676         }
677 }
678 
679 
680 static void get_service(struct atm_dev *dev)
681 {
682         struct eni_dev *eni_dev;
683         struct atm_vcc *vcc;
684         unsigned long vci;
685 
686         DPRINTK(">get_service\n");
687         eni_dev = ENI_DEV(dev);
688         while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) {
689                 vci = readl(eni_dev->service+eni_dev->serv_read*4);
690                 eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1);
691                 vcc = eni_dev->rx_map[vci & 1023];
692                 if (!vcc) {
693                         printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not "
694                             "found\n",dev->number,vci);
695                         continue; /* nasty but we try to go on anyway */
696                         /* @@@ nope, doesn't work */
697                 }
698                 EVENT("getting from service\n",0,0);
699                 if (ENI_VCC(vcc)->next != ENI_VCC_NOS) {
700                         EVENT("double service\n",0,0);
701                         DPRINTK("Grr, servicing VCC %ld twice\n",vci);
702                         continue;
703                 }
704                 ENI_VCC(vcc)->timestamp = ktime_get_real();
705                 ENI_VCC(vcc)->next = NULL;
706                 if (vcc->qos.rxtp.traffic_class == ATM_CBR) {
707                         if (eni_dev->fast)
708                                 ENI_VCC(eni_dev->last_fast)->next = vcc;
709                         else eni_dev->fast = vcc;
710                         eni_dev->last_fast = vcc;
711                 }
712                 else {
713                         if (eni_dev->slow)
714                                 ENI_VCC(eni_dev->last_slow)->next = vcc;
715                         else eni_dev->slow = vcc;
716                         eni_dev->last_slow = vcc;
717                 }
718 putting++;
719                 ENI_VCC(vcc)->servicing++;
720         }
721 }
722 
723 
724 static void dequeue_rx(struct atm_dev *dev)
725 {
726         struct eni_dev *eni_dev;
727         struct eni_vcc *eni_vcc;
728         struct atm_vcc *vcc;
729         struct sk_buff *skb;
730         void __iomem *vci_dsc;
731         int first;
732 
733         eni_dev = ENI_DEV(dev);
734         first = 1;
735         while (1) {
736                 skb = skb_dequeue(&eni_dev->rx_queue);
737                 if (!skb) {
738                         if (first) {
739                                 DPRINTK(DEV_LABEL "(itf %d): RX but not "
740                                     "rxing\n",dev->number);
741                                 EVENT("nothing to dequeue\n",0,0);
742                         }
743                         break;
744                 }
745                 EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb),
746                     ENI_PRV_POS(skb));
747 rx_dequeued++;
748                 vcc = ATM_SKB(skb)->vcc;
749                 eni_vcc = ENI_VCC(vcc);
750                 first = 0;
751                 vci_dsc = eni_dev->vci+vcc->vci*16;
752                 if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb),
753                     (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT,
754                     eni_vcc->words)) {
755                         EVENT("requeuing\n",0,0);
756                         skb_queue_head(&eni_dev->rx_queue,skb);
757                         break;
758                 }
759                 eni_vcc->rxing--;
760                 eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1);
761                 pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len,
762                     PCI_DMA_TODEVICE);
763                 if (!skb->len) dev_kfree_skb_irq(skb);
764                 else {
765                         EVENT("pushing (len=%ld)\n",skb->len,0);
766                         if (vcc->qos.aal == ATM_AAL0)
767                                 *(unsigned long *) skb->data =
768                                     ntohl(*(unsigned long *) skb->data);
769                         memset(skb->cb,0,sizeof(struct eni_skb_prv));
770                         vcc->push(vcc,skb);
771                         pushed++;
772                 }
773                 atomic_inc(&vcc->stats->rx);
774         }
775         wake_up(&eni_dev->rx_wait);
776 }
777 
778 
779 static int open_rx_first(struct atm_vcc *vcc)
780 {
781         struct eni_dev *eni_dev;
782         struct eni_vcc *eni_vcc;
783         unsigned long size;
784 
785         DPRINTK("open_rx_first\n");
786         eni_dev = ENI_DEV(vcc->dev);
787         eni_vcc = ENI_VCC(vcc);
788         eni_vcc->rx = NULL;
789         if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0;
790         size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100;
791         if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <=
792             MID_MAX_BUF_SIZE)
793                 size = MID_MAX_BUF_SIZE;
794         eni_vcc->recv = eni_alloc_mem(eni_dev,&size);
795         DPRINTK("rx at 0x%lx\n",eni_vcc->recv);
796         eni_vcc->words = size >> 2;
797         if (!eni_vcc->recv) return -ENOBUFS;
798         eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0;
799         eni_vcc->descr = 0;
800         eni_vcc->rx_pos = 0;
801         eni_vcc->rxing = 0;
802         eni_vcc->servicing = 0;
803         eni_vcc->next = ENI_VCC_NOS;
804         return 0;
805 }
806 
807 
808 static int open_rx_second(struct atm_vcc *vcc)
809 {
810         void __iomem *here;
811         struct eni_dev *eni_dev;
812         struct eni_vcc *eni_vcc;
813         unsigned long size;
814         int order;
815 
816         DPRINTK("open_rx_second\n");
817         eni_dev = ENI_DEV(vcc->dev);
818         eni_vcc = ENI_VCC(vcc);
819         if (!eni_vcc->rx) return 0;
820         /* set up VCI descriptor */
821         here = eni_dev->vci+vcc->vci*16;
822         DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4);
823         size = eni_vcc->words >> 8;
824         for (order = -1; size; order++) size >>= 1;
825         writel(0,here+4); /* descr, read = 0 */
826         writel(0,here+8); /* write, state, count = 0 */
827         if (eni_dev->rx_map[vcc->vci])
828                 printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already "
829                     "in use\n",vcc->dev->number,vcc->vci);
830         eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */
831         writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) <<
832             MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE |
833             (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) <<
834             MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here);
835         return 0;
836 }
837 
838 
839 static void close_rx(struct atm_vcc *vcc)
840 {
841         DECLARE_WAITQUEUE(wait,current);
842         void __iomem *here;
843         struct eni_dev *eni_dev;
844         struct eni_vcc *eni_vcc;
845 
846         eni_vcc = ENI_VCC(vcc);
847         if (!eni_vcc->rx) return;
848         eni_dev = ENI_DEV(vcc->dev);
849         if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) {
850                 here = eni_dev->vci+vcc->vci*16;
851                 /* block receiver */
852                 writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH <<
853                     MID_VCI_MODE_SHIFT),here);
854                 /* wait for receiver to become idle */
855                 udelay(27);
856                 /* discard pending cell */
857                 writel(readl(here) & ~MID_VCI_IN_SERVICE,here);
858                 /* don't accept any new ones */
859                 eni_dev->rx_map[vcc->vci] = NULL;
860                 /* wait for RX queue to drain */
861                 DPRINTK("eni_close: waiting for RX ...\n");
862                 EVENT("RX closing\n",0,0);
863                 add_wait_queue(&eni_dev->rx_wait,&wait);
864                 set_current_state(TASK_UNINTERRUPTIBLE);
865                 barrier();
866                 for (;;) {
867                         /* transition service->rx: rxing++, servicing-- */
868                         if (!eni_vcc->servicing) {
869                                 barrier();
870                                 if (!eni_vcc->rxing) break;
871                         }
872                         EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing,
873                             eni_vcc->servicing);
874                         printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing,
875                             eni_vcc->rxing);
876                         schedule();
877                         set_current_state(TASK_UNINTERRUPTIBLE);
878                 }
879                 for (;;) {
880                         int at_end;
881                         u32 tmp;
882 
883                         tasklet_disable(&eni_dev->task);
884                         tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ;
885                         at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT;
886                         tasklet_enable(&eni_dev->task);
887                         if (at_end) break;
888                         EVENT("drain discard (host 0x%lx, nic 0x%lx)\n",
889                             eni_vcc->rx_pos,tmp);
890                         printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n",
891                             eni_vcc->rx_pos,tmp);
892                         schedule();
893                         set_current_state(TASK_UNINTERRUPTIBLE);
894                 }
895                 set_current_state(TASK_RUNNING);
896                 remove_wait_queue(&eni_dev->rx_wait,&wait);
897         }
898         eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2);
899         eni_vcc->rx = NULL;
900 }
901 
902 
903 static int start_rx(struct atm_dev *dev)
904 {
905         struct eni_dev *eni_dev;
906 
907         eni_dev = ENI_DEV(dev);
908         eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL);
909         if (!eni_dev->rx_map) {
910                 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
911                     dev->number);
912                 free_page((unsigned long) eni_dev->free_list);
913                 return -ENOMEM;
914         }
915         eni_dev->rx_mult = DEFAULT_RX_MULT;
916         eni_dev->fast = eni_dev->last_fast = NULL;
917         eni_dev->slow = eni_dev->last_slow = NULL;
918         init_waitqueue_head(&eni_dev->rx_wait);
919         skb_queue_head_init(&eni_dev->rx_queue);
920         eni_dev->serv_read = eni_in(MID_SERV_WRITE);
921         eni_out(0,MID_DMA_WR_RX);
922         return 0;
923 }
924 
925 
926 /*----------------------------------- TX ------------------------------------*/
927 
928 
929 enum enq_res { enq_ok,enq_next,enq_jam };
930 
931 
932 static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr,
933     u32 size)
934 {
935         u32 init,words;
936 
937         DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size);
938         EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size);
939 #if 0 /* don't complain anymore */
940         if (paddr & 3)
941                 printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr);
942         if (size & 3)
943                 printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size);
944 #endif
945         if (paddr & 3) {
946                 init = 4-(paddr & 3);
947                 if (init > size || size < 7) init = size;
948                 DPRINTK("put_dma: %lx DMA: %d/%d bytes\n",
949                     (unsigned long) paddr,init,size);
950                 dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) |
951                     (chan << MID_DMA_CHAN_SHIFT);
952                 dma[(*j)++] = paddr;
953                 paddr += init;
954                 size -= init;
955         }
956         words = size >> 2;
957         size &= 3;
958         if (words && (paddr & 31)) {
959                 init = 8-((paddr & 31) >> 2);
960                 if (init > words) init = words;
961                 DPRINTK("put_dma: %lx DMA: %d/%d words\n",
962                     (unsigned long) paddr,init,words);
963                 dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
964                     (chan << MID_DMA_CHAN_SHIFT);
965                 dma[(*j)++] = paddr;
966                 paddr += init << 2;
967                 words -= init;
968         }
969 #ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */
970         if (words & ~15) {
971                 DPRINTK("put_dma: %lx DMA: %d*16/%d words\n",
972                     (unsigned long) paddr,words >> 4,words);
973                 dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT)
974                     | (chan << MID_DMA_CHAN_SHIFT);
975                 dma[(*j)++] = paddr;
976                 paddr += (words & ~15) << 2;
977                 words &= 15;
978         }
979 #endif
980 #ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */
981         if (words & ~7) {
982                 DPRINTK("put_dma: %lx DMA: %d*8/%d words\n",
983                     (unsigned long) paddr,words >> 3,words);
984                 dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT)
985                     | (chan << MID_DMA_CHAN_SHIFT);
986                 dma[(*j)++] = paddr;
987                 paddr += (words & ~7) << 2;
988                 words &= 7;
989         }
990 #endif
991 #ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */
992         if (words & ~3) {
993                 DPRINTK("put_dma: %lx DMA: %d*4/%d words\n",
994                     (unsigned long) paddr,words >> 2,words);
995                 dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT)
996                     | (chan << MID_DMA_CHAN_SHIFT);
997                 dma[(*j)++] = paddr;
998                 paddr += (words & ~3) << 2;
999                 words &= 3;
1000         }
1001 #endif
1002 #ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */
1003         if (words & ~1) {
1004                 DPRINTK("put_dma: %lx DMA: %d*2/%d words\n",
1005                     (unsigned long) paddr,words >> 1,words);
1006                 dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT)
1007                     | (chan << MID_DMA_CHAN_SHIFT);
1008                 dma[(*j)++] = paddr;
1009                 paddr += (words & ~1) << 2;
1010                 words &= 1;
1011         }
1012 #endif
1013         if (words) {
1014                 DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr,
1015                     words);
1016                 dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) |
1017                     (chan << MID_DMA_CHAN_SHIFT);
1018                 dma[(*j)++] = paddr;
1019                 paddr += words << 2;
1020         }
1021         if (size) {
1022                 DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr,
1023                     size);
1024                 dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) |
1025                     (chan << MID_DMA_CHAN_SHIFT);
1026                 dma[(*j)++] = paddr;
1027         }
1028 }
1029 
1030 
1031 static enum enq_res do_tx(struct sk_buff *skb)
1032 {
1033         struct atm_vcc *vcc;
1034         struct eni_dev *eni_dev;
1035         struct eni_vcc *eni_vcc;
1036         struct eni_tx *tx;
1037         dma_addr_t paddr;
1038         u32 dma_rd,dma_wr;
1039         u32 size; /* in words */
1040         int aal5,dma_size,i,j;
1041 
1042         DPRINTK(">do_tx\n");
1043         NULLCHECK(skb);
1044         EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len);
1045         vcc = ATM_SKB(skb)->vcc;
1046         NULLCHECK(vcc);
1047         eni_dev = ENI_DEV(vcc->dev);
1048         NULLCHECK(eni_dev);
1049         eni_vcc = ENI_VCC(vcc);
1050         tx = eni_vcc->tx;
1051         NULLCHECK(tx);
1052 #if 0 /* Enable this for testing with the "align" program */
1053         {
1054                 unsigned int hack = *((char *) skb->data)-'';
1055 
1056                 if (hack < 8) {
1057                         skb->data += hack;
1058                         skb->len -= hack;
1059                 }
1060         }
1061 #endif
1062 #if 0 /* should work now */
1063         if ((unsigned long) skb->data & 3)
1064                 printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned "
1065                     "TX data\n",vcc->dev->number,vcc->vci);
1066 #endif
1067         /*
1068          * Potential future IP speedup: make hard_header big enough to put
1069          * segmentation descriptor directly into PDU. Saves: 4 slave writes,
1070          * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-)
1071          */
1072 
1073         aal5 = vcc->qos.aal == ATM_AAL5;
1074         /* check space in buffer */
1075         if (!aal5)
1076                 size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE;
1077                         /* cell without HEC plus segmentation header (includes
1078                            four-byte cell header) */
1079         else {
1080                 size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1;
1081                         /* add AAL5 trailer */
1082                 size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE;
1083                                                 /* add segmentation header */
1084         }
1085         /*
1086          * Can I move tx_pos by size bytes without getting closer than TX_GAP
1087          * to the read pointer ? TX_GAP means to leave some space for what
1088          * the manual calls "too close".
1089          */
1090         if (!NEPMOK(tx->tx_pos,size+TX_GAP,
1091             eni_in(MID_TX_RDPTR(tx->index)),tx->words)) {
1092                 DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n",
1093                     vcc->dev->number,size);
1094                 return enq_next;
1095         }
1096         /* check DMA */
1097         dma_wr = eni_in(MID_DMA_WR_TX);
1098         dma_rd = eni_in(MID_DMA_RD_TX);
1099         dma_size = 3; /* JK for descriptor and final fill, plus final size
1100                          mis-alignment fix */
1101 DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags);
1102         if (!skb_shinfo(skb)->nr_frags) dma_size += 5;
1103         else dma_size += 5*(skb_shinfo(skb)->nr_frags+1);
1104         if (dma_size > TX_DMA_BUF) {
1105                 printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries "
1106                     "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF);
1107         }
1108         DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos);
1109         if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) <
1110              dma_size) {
1111                 printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n",
1112                     vcc->dev->number);
1113                 return enq_jam;
1114         }
1115         paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len,
1116             PCI_DMA_TODEVICE);
1117         ENI_PRV_PADDR(skb) = paddr;
1118         /* prepare DMA queue entries */
1119         j = 0;
1120         eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) <<
1121              MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1122              MID_DT_JK;
1123         j++;
1124         if (!skb_shinfo(skb)->nr_frags)
1125                 if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len);
1126                 else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4);
1127         else {
1128 DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */
1129                 for (i = -1; i < skb_shinfo(skb)->nr_frags; i++)
1130                         if (i == -1)
1131                                 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1132                                     skb->data,
1133                                     skb_headlen(skb));
1134                         else
1135                                 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1136                                     skb_frag_page(&skb_shinfo(skb)->frags[i]) +
1137                                         skb_shinfo(skb)->frags[i].page_offset,
1138                                     skb_frag_size(&skb_shinfo(skb)->frags[i]));
1139         }
1140         if (skb->len & 3) {
1141                 put_dma(tx->index, eni_dev->dma, &j, eni_dev->zero.dma,
1142                         4 - (skb->len & 3));
1143         }
1144         /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */
1145         eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) <<
1146              MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1147              MID_DMA_END | MID_DT_JK;
1148         j++;
1149         DPRINTK("DMA at end: %d\n",j);
1150         /* store frame */
1151         writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) |
1152             (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) |
1153             (tx->resolution << MID_SEG_RATE_SHIFT) |
1154             (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4);
1155 /*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/
1156         writel((vcc->vci << MID_SEG_VCI_SHIFT) |
1157             (aal5 ? 0 : (skb->data[3] & 0xf)) |
1158             (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0),
1159             tx->send+((tx->tx_pos+1) & (tx->words-1))*4);
1160         DPRINTK("size: %d, len:%d\n",size,skb->len);
1161         if (aal5)
1162                 writel(skb->len,tx->send+
1163                     ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4);
1164         j = j >> 1;
1165         for (i = 0; i < j; i++) {
1166                 writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8);
1167                 writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4);
1168                 dma_wr = (dma_wr+1) & (NR_DMA_TX-1);
1169         }
1170         ENI_PRV_POS(skb) = tx->tx_pos;
1171         ENI_PRV_SIZE(skb) = size;
1172         ENI_VCC(vcc)->txing += size;
1173         tx->tx_pos = (tx->tx_pos+size) & (tx->words-1);
1174         DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos);
1175         eni_out(dma_wr,MID_DMA_WR_TX);
1176         skb_queue_tail(&eni_dev->tx_queue,skb);
1177 queued++;
1178         return enq_ok;
1179 }
1180 
1181 
1182 static void poll_tx(struct atm_dev *dev)
1183 {
1184         struct eni_tx *tx;
1185         struct sk_buff *skb;
1186         enum enq_res res;
1187         int i;
1188 
1189         DPRINTK(">poll_tx\n");
1190         for (i = NR_CHAN-1; i >= 0; i--) {
1191                 tx = &ENI_DEV(dev)->tx[i];
1192                 if (tx->send)
1193                         while ((skb = skb_dequeue(&tx->backlog))) {
1194                                 res = do_tx(skb);
1195                                 if (res == enq_ok) continue;
1196                                 DPRINTK("re-queuing TX PDU\n");
1197                                 skb_queue_head(&tx->backlog,skb);
1198 requeued++;
1199                                 if (res == enq_jam) return;
1200                                 break;
1201                         }
1202         }
1203 }
1204 
1205 
1206 static void dequeue_tx(struct atm_dev *dev)
1207 {
1208         struct eni_dev *eni_dev;
1209         struct atm_vcc *vcc;
1210         struct sk_buff *skb;
1211         struct eni_tx *tx;
1212 
1213         NULLCHECK(dev);
1214         eni_dev = ENI_DEV(dev);
1215         NULLCHECK(eni_dev);
1216         while ((skb = skb_dequeue(&eni_dev->tx_queue))) {
1217                 vcc = ATM_SKB(skb)->vcc;
1218                 NULLCHECK(vcc);
1219                 tx = ENI_VCC(vcc)->tx;
1220                 NULLCHECK(ENI_VCC(vcc)->tx);
1221                 DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb),
1222                     (unsigned) eni_in(MID_TX_DESCRSTART(tx->index)));
1223                 if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) ==
1224                     eni_in(MID_TX_DESCRSTART(tx->index))) {
1225                         skb_queue_head(&eni_dev->tx_queue,skb);
1226                         break;
1227                 }
1228                 ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb);
1229                 pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len,
1230                     PCI_DMA_TODEVICE);
1231                 if (vcc->pop) vcc->pop(vcc,skb);
1232                 else dev_kfree_skb_irq(skb);
1233                 atomic_inc(&vcc->stats->tx);
1234                 wake_up(&eni_dev->tx_wait);
1235 dma_complete++;
1236         }
1237 }
1238 
1239 
1240 static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr)
1241 {
1242         int i;
1243 
1244         for (i = !ubr; i < NR_CHAN; i++)
1245                 if (!eni_dev->tx[i].send) return eni_dev->tx+i;
1246         return NULL;
1247 }
1248 
1249 
1250 static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre,
1251     int *res,int unlimited)
1252 {
1253         static const int pre_div[] = { 4,16,128,2048 };
1254             /* 2^(((x+2)^2-(x+2))/2+1) */
1255 
1256         if (unlimited) *pre = *res = 0;
1257         else {
1258                 if (*pcr > 0) {
1259                         int div;
1260 
1261                         for (*pre = 0; *pre < 3; (*pre)++)
1262                                 if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break;
1263                         div = pre_div[*pre]**pcr;
1264                         DPRINTK("min div %d\n",div);
1265                         *res = TS_CLOCK/div-1;
1266                 }
1267                 else {
1268                         int div;
1269 
1270                         if (!*pcr) *pcr = eni_dev->tx_bw+reserved;
1271                         for (*pre = 3; *pre >= 0; (*pre)--)
1272                                 if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break;
1273                         if (*pre < 3) (*pre)++; /* else fail later */
1274                         div = pre_div[*pre]*-*pcr;
1275                         DPRINTK("max div %d\n",div);
1276                         *res = DIV_ROUND_UP(TS_CLOCK, div)-1;
1277                 }
1278                 if (*res < 0) *res = 0;
1279                 if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE;
1280         }
1281         *pcr = TS_CLOCK/pre_div[*pre]/(*res+1);
1282         DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res);
1283         return 0;
1284 }
1285 
1286 
1287 static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp,
1288     int set_rsv,int set_shp)
1289 {
1290         struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1291         struct eni_vcc *eni_vcc = ENI_VCC(vcc);
1292         struct eni_tx *tx;
1293         unsigned long size;
1294         void __iomem *mem;
1295         int rate,ubr,unlimited,new_tx;
1296         int pre,res,order;
1297         int error;
1298 
1299         rate = atm_pcr_goal(txtp);
1300         ubr = txtp->traffic_class == ATM_UBR;
1301         unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR ||
1302             rate >= ATM_OC3_PCR);
1303         if (!unlimited) {
1304                 size = txtp->max_sdu*eni_dev->tx_mult/100;
1305                 if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <=
1306                     MID_MAX_BUF_SIZE)
1307                         size = MID_MAX_BUF_SIZE;
1308         }
1309         else {
1310                 if (eni_dev->ubr) {
1311                         eni_vcc->tx = eni_dev->ubr;
1312                         txtp->pcr = ATM_OC3_PCR;
1313                         return 0;
1314                 }
1315                 size = UBR_BUFFER;
1316         }
1317         new_tx = !eni_vcc->tx;
1318         mem = NULL; /* for gcc */
1319         if (!new_tx) tx = eni_vcc->tx;
1320         else {
1321                 mem = eni_alloc_mem(eni_dev,&size);
1322                 if (!mem) return -ENOBUFS;
1323                 tx = alloc_tx(eni_dev,unlimited);
1324                 if (!tx) {
1325                         eni_free_mem(eni_dev,mem,size);
1326                         return -EBUSY;
1327                 }
1328                 DPRINTK("got chan %d\n",tx->index);
1329                 tx->reserved = tx->shaping = 0;
1330                 tx->send = mem;
1331                 tx->words = size >> 2;
1332                 skb_queue_head_init(&tx->backlog);
1333                 for (order = 0; size > (1 << (order+10)); order++);
1334                 eni_out((order << MID_SIZE_SHIFT) |
1335                     ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)),
1336                     MID_TX_PLACE(tx->index));
1337                 tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) &
1338                     MID_DESCR_START;
1339         }
1340         error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited);
1341         if (!error  && txtp->min_pcr > rate) error = -EINVAL;
1342         if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR &&
1343             txtp->max_pcr < rate) error = -EINVAL;
1344         if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved)
1345                 error = -EINVAL;
1346         if (!error && set_rsv && !set_shp && rate < tx->shaping)
1347                 error = -EINVAL;
1348         if (!error && !set_rsv && rate > tx->reserved && !ubr)
1349                 error = -EINVAL;
1350         if (error) {
1351                 if (new_tx) {
1352                         tx->send = NULL;
1353                         eni_free_mem(eni_dev,mem,size);
1354                 }
1355                 return error;
1356         }
1357         txtp->pcr = rate;
1358         if (set_rsv && !ubr) {
1359                 eni_dev->tx_bw += tx->reserved;
1360                 tx->reserved = rate;
1361                 eni_dev->tx_bw -= rate;
1362         }
1363         if (set_shp || (unlimited && new_tx)) {
1364                 if (unlimited && new_tx) eni_dev->ubr = tx;
1365                 tx->prescaler = pre;
1366                 tx->resolution = res;
1367                 tx->shaping = rate;
1368         }
1369         if (set_shp) eni_vcc->tx = tx;
1370         DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping);
1371         return 0;
1372 }
1373 
1374 
1375 static int open_tx_first(struct atm_vcc *vcc)
1376 {
1377         ENI_VCC(vcc)->tx = NULL;
1378         if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0;
1379         ENI_VCC(vcc)->txing = 0;
1380         return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1);
1381 }
1382 
1383 
1384 static int open_tx_second(struct atm_vcc *vcc)
1385 {
1386         return 0; /* nothing to do */
1387 }
1388 
1389 
1390 static void close_tx(struct atm_vcc *vcc)
1391 {
1392         DECLARE_WAITQUEUE(wait,current);
1393         struct eni_dev *eni_dev;
1394         struct eni_vcc *eni_vcc;
1395 
1396         eni_vcc = ENI_VCC(vcc);
1397         if (!eni_vcc->tx) return;
1398         eni_dev = ENI_DEV(vcc->dev);
1399         /* wait for TX queue to drain */
1400         DPRINTK("eni_close: waiting for TX ...\n");
1401         add_wait_queue(&eni_dev->tx_wait,&wait);
1402         set_current_state(TASK_UNINTERRUPTIBLE);
1403         for (;;) {
1404                 int txing;
1405 
1406                 tasklet_disable(&eni_dev->task);
1407                 txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing;
1408                 tasklet_enable(&eni_dev->task);
1409                 if (!txing) break;
1410                 DPRINTK("%d TX left\n",eni_vcc->txing);
1411                 schedule();
1412                 set_current_state(TASK_UNINTERRUPTIBLE);
1413         }
1414         set_current_state(TASK_RUNNING);
1415         remove_wait_queue(&eni_dev->tx_wait,&wait);
1416         if (eni_vcc->tx != eni_dev->ubr) {
1417                 /*
1418                  * Looping a few times in here is probably far cheaper than
1419                  * keeping track of TX completions all the time, so let's poll
1420                  * a bit ...
1421                  */
1422                 while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) !=
1423                     eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index)))
1424                         schedule();
1425                 eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2);
1426                 eni_vcc->tx->send = NULL;
1427                 eni_dev->tx_bw += eni_vcc->tx->reserved;
1428         }
1429         eni_vcc->tx = NULL;
1430 }
1431 
1432 
1433 static int start_tx(struct atm_dev *dev)
1434 {
1435         struct eni_dev *eni_dev;
1436         int i;
1437 
1438         eni_dev = ENI_DEV(dev);
1439         eni_dev->lost = 0;
1440         eni_dev->tx_bw = ATM_OC3_PCR;
1441         eni_dev->tx_mult = DEFAULT_TX_MULT;
1442         init_waitqueue_head(&eni_dev->tx_wait);
1443         eni_dev->ubr = NULL;
1444         skb_queue_head_init(&eni_dev->tx_queue);
1445         eni_out(0,MID_DMA_WR_TX);
1446         for (i = 0; i < NR_CHAN; i++) {
1447                 eni_dev->tx[i].send = NULL;
1448                 eni_dev->tx[i].index = i;
1449         }
1450         return 0;
1451 }
1452 
1453 
1454 /*--------------------------------- common ----------------------------------*/
1455 
1456 
1457 #if 0 /* may become useful again when tuning things */
1458 
1459 static void foo(void)
1460 {
1461 printk(KERN_INFO
1462   "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n"
1463   "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n",
1464   tx_complete,dma_complete,queued,requeued,submitted,backlogged,
1465   rx_enqueued,rx_dequeued,putting,pushed);
1466 if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost);
1467 }
1468 
1469 #endif
1470 
1471 
1472 static void bug_int(struct atm_dev *dev,unsigned long reason)
1473 {
1474         DPRINTK(">bug_int\n");
1475         if (reason & MID_DMA_ERR_ACK)
1476                 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1477                     "error\n",dev->number);
1478         if (reason & MID_TX_IDENT_MISM)
1479                 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident "
1480                     "mismatch\n",dev->number);
1481         if (reason & MID_TX_DMA_OVFL)
1482                 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1483                     "overflow\n",dev->number);
1484         EVENT("---dump ends here---\n",0,0);
1485         printk(KERN_NOTICE "---recent events---\n");
1486         event_dump();
1487 }
1488 
1489 
1490 static irqreturn_t eni_int(int irq,void *dev_id)
1491 {
1492         struct atm_dev *dev;
1493         struct eni_dev *eni_dev;
1494         u32 reason;
1495 
1496         DPRINTK(">eni_int\n");
1497         dev = dev_id;
1498         eni_dev = ENI_DEV(dev);
1499         reason = eni_in(MID_ISA);
1500         DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason);
1501         /*
1502          * Must handle these two right now, because reading ISA doesn't clear
1503          * them, so they re-occur and we never make it to the tasklet. Since
1504          * they're rare, we don't mind the occasional invocation of eni_tasklet
1505          * with eni_dev->events == 0.
1506          */
1507         if (reason & MID_STAT_OVFL) {
1508                 EVENT("stat overflow\n",0,0);
1509                 eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH;
1510         }
1511         if (reason & MID_SUNI_INT) {
1512                 EVENT("SUNI int\n",0,0);
1513                 dev->phy->interrupt(dev);
1514 #if 0
1515                 foo();
1516 #endif
1517         }
1518         spin_lock(&eni_dev->lock);
1519         eni_dev->events |= reason;
1520         spin_unlock(&eni_dev->lock);
1521         tasklet_schedule(&eni_dev->task);
1522         return IRQ_HANDLED;
1523 }
1524 
1525 
1526 static void eni_tasklet(unsigned long data)
1527 {
1528         struct atm_dev *dev = (struct atm_dev *) data;
1529         struct eni_dev *eni_dev = ENI_DEV(dev);
1530         unsigned long flags;
1531         u32 events;
1532 
1533         DPRINTK("eni_tasklet (dev %p)\n",dev);
1534         spin_lock_irqsave(&eni_dev->lock,flags);
1535         events = xchg(&eni_dev->events,0);
1536         spin_unlock_irqrestore(&eni_dev->lock,flags);
1537         if (events & MID_RX_DMA_COMPLETE) {
1538                 EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0);
1539                 dequeue_rx(dev);
1540                 EVENT("dequeue_rx done, starting poll_rx\n",0,0);
1541                 poll_rx(dev);
1542                 EVENT("poll_rx done\n",0,0);
1543                 /* poll_tx ? */
1544         }
1545         if (events & MID_SERVICE) {
1546                 EVENT("INT: service, starting get_service\n",0,0);
1547                 get_service(dev);
1548                 EVENT("get_service done, starting poll_rx\n",0,0);
1549                 poll_rx(dev);
1550                 EVENT("poll_rx done\n",0,0);
1551         }
1552         if (events & MID_TX_DMA_COMPLETE) {
1553                 EVENT("INT: TX DMA COMPLETE\n",0,0);
1554                 dequeue_tx(dev);
1555         }
1556         if (events & MID_TX_COMPLETE) {
1557                 EVENT("INT: TX COMPLETE\n",0,0);
1558 tx_complete++;
1559                 wake_up(&eni_dev->tx_wait);
1560                 /* poll_rx ? */
1561         }
1562         if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) {
1563                 EVENT("bug interrupt\n",0,0);
1564                 bug_int(dev,events);
1565         }
1566         poll_tx(dev);
1567 }
1568 
1569 
1570 /*--------------------------------- entries ---------------------------------*/
1571 
1572 
1573 static char * const media_name[] = {
1574     "MMF", "SMF", "MMF", "03?", /*  0- 3 */
1575     "UTP", "05?", "06?", "07?", /*  4- 7 */
1576     "TAXI","09?", "10?", "11?", /*  8-11 */
1577     "12?", "13?", "14?", "15?", /* 12-15 */
1578     "MMF", "SMF", "18?", "19?", /* 16-19 */
1579     "UTP", "21?", "22?", "23?", /* 20-23 */
1580     "24?", "25?", "26?", "27?", /* 24-27 */
1581     "28?", "29?", "30?", "31?"  /* 28-31 */
1582 };
1583 
1584 
1585 #define SET_SEPROM \
1586   ({ if (!error && !pci_error) { \
1587     pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \
1588     udelay(10); /* 10 usecs */ \
1589   } })
1590 #define GET_SEPROM \
1591   ({ if (!error && !pci_error) { \
1592     pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \
1593     udelay(10); /* 10 usecs */ \
1594   } })
1595 
1596 
1597 static int get_esi_asic(struct atm_dev *dev)
1598 {
1599         struct eni_dev *eni_dev;
1600         unsigned char tonga;
1601         int error,failed,pci_error;
1602         int address,i,j;
1603 
1604         eni_dev = ENI_DEV(dev);
1605         error = pci_error = 0;
1606         tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK;
1607         SET_SEPROM;
1608         for (i = 0; i < ESI_LEN && !error && !pci_error; i++) {
1609                 /* start operation */
1610                 tonga |= SEPROM_DATA;
1611                 SET_SEPROM;
1612                 tonga |= SEPROM_CLK;
1613                 SET_SEPROM;
1614                 tonga &= ~SEPROM_DATA;
1615                 SET_SEPROM;
1616                 tonga &= ~SEPROM_CLK;
1617                 SET_SEPROM;
1618                 /* send address */
1619                 address = ((i+SEPROM_ESI_BASE) << 1)+1;
1620                 for (j = 7; j >= 0; j--) {
1621                         tonga = (address >> j) & 1 ? tonga | SEPROM_DATA :
1622                             tonga & ~SEPROM_DATA;
1623                         SET_SEPROM;
1624                         tonga |= SEPROM_CLK;
1625                         SET_SEPROM;
1626                         tonga &= ~SEPROM_CLK;
1627                         SET_SEPROM;
1628                 }
1629                 /* get ack */
1630                 tonga |= SEPROM_DATA;
1631                 SET_SEPROM;
1632                 tonga |= SEPROM_CLK;
1633                 SET_SEPROM;
1634                 GET_SEPROM;
1635                 failed = tonga & SEPROM_DATA;
1636                 tonga &= ~SEPROM_CLK;
1637                 SET_SEPROM;
1638                 tonga |= SEPROM_DATA;
1639                 SET_SEPROM;
1640                 if (failed) error = -EIO;
1641                 else {
1642                         dev->esi[i] = 0;
1643                         for (j = 7; j >= 0; j--) {
1644                                 dev->esi[i] <<= 1;
1645                                 tonga |= SEPROM_DATA;
1646                                 SET_SEPROM;
1647                                 tonga |= SEPROM_CLK;
1648                                 SET_SEPROM;
1649                                 GET_SEPROM;
1650                                 if (tonga & SEPROM_DATA) dev->esi[i] |= 1;
1651                                 tonga &= ~SEPROM_CLK;
1652                                 SET_SEPROM;
1653                                 tonga |= SEPROM_DATA;
1654                                 SET_SEPROM;
1655                         }
1656                         /* get ack */
1657                         tonga |= SEPROM_DATA;
1658                         SET_SEPROM;
1659                         tonga |= SEPROM_CLK;
1660                         SET_SEPROM;
1661                         GET_SEPROM;
1662                         if (!(tonga & SEPROM_DATA)) error = -EIO;
1663                         tonga &= ~SEPROM_CLK;
1664                         SET_SEPROM;
1665                         tonga |= SEPROM_DATA;
1666                         SET_SEPROM;
1667                 }
1668                 /* stop operation */
1669                 tonga &= ~SEPROM_DATA;
1670                 SET_SEPROM;
1671                 tonga |= SEPROM_CLK;
1672                 SET_SEPROM;
1673                 tonga |= SEPROM_DATA;
1674                 SET_SEPROM;
1675         }
1676         if (pci_error) {
1677                 printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI "
1678                     "(0x%02x)\n",dev->number,pci_error);
1679                 error = -EIO;
1680         }
1681         return error;
1682 }
1683 
1684 
1685 #undef SET_SEPROM
1686 #undef GET_SEPROM
1687 
1688 
1689 static int get_esi_fpga(struct atm_dev *dev, void __iomem *base)
1690 {
1691         void __iomem *mac_base;
1692         int i;
1693 
1694         mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom);
1695         for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3));
1696         return 0;
1697 }
1698 
1699 
1700 static int eni_do_init(struct atm_dev *dev)
1701 {
1702         struct midway_eprom __iomem *eprom;
1703         struct eni_dev *eni_dev;
1704         struct pci_dev *pci_dev;
1705         unsigned long real_base;
1706         void __iomem *base;
1707         int error,i,last;
1708 
1709         DPRINTK(">eni_init\n");
1710         dev->ci_range.vpi_bits = 0;
1711         dev->ci_range.vci_bits = NR_VCI_LD;
1712         dev->link_rate = ATM_OC3_PCR;
1713         eni_dev = ENI_DEV(dev);
1714         pci_dev = eni_dev->pci_dev;
1715         real_base = pci_resource_start(pci_dev, 0);
1716         eni_dev->irq = pci_dev->irq;
1717         if ((error = pci_write_config_word(pci_dev,PCI_COMMAND,
1718             PCI_COMMAND_MEMORY |
1719             (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1720                 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory "
1721                     "(0x%02x)\n",dev->number,error);
1722                 return -EIO;
1723         }
1724         printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,",
1725             dev->number,pci_dev->revision,real_base,eni_dev->irq);
1726         if (!(base = ioremap_nocache(real_base,MAP_MAX_SIZE))) {
1727                 printk("\n");
1728                 printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page "
1729                     "mapping\n",dev->number);
1730                 return error;
1731         }
1732         eni_dev->ioaddr = base;
1733         eni_dev->base_diff = real_base - (unsigned long) base;
1734         /* id may not be present in ASIC Tonga boards - check this @@@ */
1735         if (!eni_dev->asic) {
1736                 eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom));
1737                 if (readl(&eprom->magic) != ENI155_MAGIC) {
1738                         printk("\n");
1739                         printk(KERN_ERR DEV_LABEL
1740                                "(itf %d): bad magic - expected 0x%x, got 0x%x\n",
1741                                dev->number, ENI155_MAGIC,
1742                                (unsigned)readl(&eprom->magic));
1743                         error = -EINVAL;
1744                         goto unmap;
1745                 }
1746         }
1747         eni_dev->phy = base+PHY_BASE;
1748         eni_dev->reg = base+REG_BASE;
1749         eni_dev->ram = base+RAM_BASE;
1750         last = MAP_MAX_SIZE-RAM_BASE;
1751         for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) {
1752                 writel(0x55555555,eni_dev->ram+i);
1753                 if (readl(eni_dev->ram+i) != 0x55555555) last = i;
1754                 else {
1755                         writel(0xAAAAAAAA,eni_dev->ram+i);
1756                         if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i;
1757                         else writel(i,eni_dev->ram+i);
1758                 }
1759         }
1760         for (i = 0; i < last; i += RAM_INCREMENT)
1761                 if (readl(eni_dev->ram+i) != i) break;
1762         eni_dev->mem = i;
1763         memset_io(eni_dev->ram,0,eni_dev->mem);
1764         /* TODO: should shrink allocation now */
1765         printk("mem=%dkB (",eni_dev->mem >> 10);
1766         /* TODO: check for non-SUNI, check for TAXI ? */
1767         if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) {
1768                 printk(")\n");
1769                 printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n",
1770                     dev->number,(unsigned) eni_in(MID_RES_ID_MCON));
1771                 error = -EINVAL;
1772                 goto unmap;
1773         }
1774         error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base);
1775         if (error)
1776                 goto unmap;
1777         for (i = 0; i < ESI_LEN; i++)
1778                 printk("%s%02X",i ? "-" : "",dev->esi[i]);
1779         printk(")\n");
1780         printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number,
1781             eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA",
1782             media_name[eni_in(MID_RES_ID_MCON) & DAUGTHER_ID]);
1783 
1784         error = suni_init(dev);
1785         if (error)
1786                 goto unmap;
1787 out:
1788         return error;
1789 unmap:
1790         iounmap(base);
1791         goto out;
1792 }
1793 
1794 static void eni_do_release(struct atm_dev *dev)
1795 {
1796         struct eni_dev *ed = ENI_DEV(dev);
1797 
1798         dev->phy->stop(dev);
1799         dev->phy = NULL;
1800         iounmap(ed->ioaddr);
1801 }
1802 
1803 static int eni_start(struct atm_dev *dev)
1804 {
1805         struct eni_dev *eni_dev;
1806         
1807         void __iomem *buf;
1808         unsigned long buffer_mem;
1809         int error;
1810 
1811         DPRINTK(">eni_start\n");
1812         eni_dev = ENI_DEV(dev);
1813         if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) {
1814                 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
1815                     dev->number,eni_dev->irq);
1816                 error = -EAGAIN;
1817                 goto out;
1818         }
1819         pci_set_master(eni_dev->pci_dev);
1820         if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND,
1821             PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
1822             (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1823                 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+"
1824                     "master (0x%02x)\n",dev->number,error);
1825                 goto free_irq;
1826         }
1827         if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,
1828             END_SWAP_DMA))) {
1829                 printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap "
1830                     "(0x%02x)\n",dev->number,error);
1831                 goto free_irq;
1832         }
1833         /* determine addresses of internal tables */
1834         eni_dev->vci = eni_dev->ram;
1835         eni_dev->rx_dma = eni_dev->ram+NR_VCI*16;
1836         eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8;
1837         eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8;
1838         buf = eni_dev->service+NR_SERVICE*4;
1839         DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n",
1840              eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma,
1841              eni_dev->service,buf);
1842         spin_lock_init(&eni_dev->lock);
1843         tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev);
1844         eni_dev->events = 0;
1845         /* initialize memory management */
1846         buffer_mem = eni_dev->mem - (buf - eni_dev->ram);
1847         eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2;
1848         eni_dev->free_list = kmalloc(
1849             sizeof(struct eni_free)*(eni_dev->free_list_size+1),GFP_KERNEL);
1850         if (!eni_dev->free_list) {
1851                 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
1852                     dev->number);
1853                 error = -ENOMEM;
1854                 goto free_irq;
1855         }
1856         eni_dev->free_len = 0;
1857         eni_put_free(eni_dev,buf,buffer_mem);
1858         memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */
1859         /*
1860          * byte_addr  free (k)
1861          * 0x00000000     512  VCI table
1862          * 0x00004000     496  RX DMA
1863          * 0x00005000     492  TX DMA
1864          * 0x00006000     488  service list
1865          * 0x00007000     484  buffers
1866          * 0x00080000       0  end (512kB)
1867          */
1868         eni_out(0xffffffff,MID_IE);
1869         error = start_tx(dev);
1870         if (error) goto free_list;
1871         error = start_rx(dev);
1872         if (error) goto free_list;
1873         error = dev->phy->start(dev);
1874         if (error) goto free_list;
1875         eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) |
1876             MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE,
1877             MID_MC_S);
1878             /* Tonga uses SBus INTReq1 */
1879         (void) eni_in(MID_ISA); /* clear Midway interrupts */
1880         return 0;
1881 
1882 free_list:
1883         kfree(eni_dev->free_list);
1884 
1885 free_irq:
1886         free_irq(eni_dev->irq, dev);
1887 
1888 out:
1889         return error;
1890 }
1891 
1892 
1893 static void eni_close(struct atm_vcc *vcc)
1894 {
1895         DPRINTK(">eni_close\n");
1896         if (!ENI_VCC(vcc)) return;
1897         clear_bit(ATM_VF_READY,&vcc->flags);
1898         close_rx(vcc);
1899         close_tx(vcc);
1900         DPRINTK("eni_close: done waiting\n");
1901         /* deallocate memory */
1902         kfree(ENI_VCC(vcc));
1903         vcc->dev_data = NULL;
1904         clear_bit(ATM_VF_ADDR,&vcc->flags);
1905         /*foo();*/
1906 }
1907 
1908 
1909 static int eni_open(struct atm_vcc *vcc)
1910 {
1911         struct eni_vcc *eni_vcc;
1912         int error;
1913         short vpi = vcc->vpi;
1914         int vci = vcc->vci;
1915 
1916         DPRINTK(">eni_open\n");
1917         EVENT("eni_open\n",0,0);
1918         if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1919                 vcc->dev_data = NULL;
1920         if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
1921                 set_bit(ATM_VF_ADDR,&vcc->flags);
1922         if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5)
1923                 return -EINVAL;
1924         DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi,
1925             vcc->vci);
1926         if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
1927                 eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL);
1928                 if (!eni_vcc) return -ENOMEM;
1929                 vcc->dev_data = eni_vcc;
1930                 eni_vcc->tx = NULL; /* for eni_close after open_rx */
1931                 if ((error = open_rx_first(vcc))) {
1932                         eni_close(vcc);
1933                         return error;
1934                 }
1935                 if ((error = open_tx_first(vcc))) {
1936                         eni_close(vcc);
1937                         return error;
1938                 }
1939         }
1940         if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0;
1941         if ((error = open_rx_second(vcc))) {
1942                 eni_close(vcc);
1943                 return error;
1944         }
1945         if ((error = open_tx_second(vcc))) {
1946                 eni_close(vcc);
1947                 return error;
1948         }
1949         set_bit(ATM_VF_READY,&vcc->flags);
1950         /* should power down SUNI while !ref_count @@@ */
1951         return 0;
1952 }
1953 
1954 
1955 static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs)
1956 {
1957         struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1958         struct eni_tx *tx = ENI_VCC(vcc)->tx;
1959         struct sk_buff *skb;
1960         int error,rate,rsv,shp;
1961 
1962         if (qos->txtp.traffic_class == ATM_NONE) return 0;
1963         if (tx == eni_dev->ubr) return -EBADFD;
1964         rate = atm_pcr_goal(&qos->txtp);
1965         if (rate < 0) rate = -rate;
1966         rsv = shp = 0;
1967         if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1;
1968         if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1;
1969         if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1;
1970         if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1;
1971         if (!rsv && !shp) return 0;
1972         error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp);
1973         if (error) return error;
1974         if (shp && !(flgs & ATM_MF_IMMED)) return 0;
1975         /*
1976          * Walk through the send buffer and patch the rate information in all
1977          * segmentation buffer descriptors of this VCC.
1978          */
1979         tasklet_disable(&eni_dev->task);
1980         skb_queue_walk(&eni_dev->tx_queue, skb) {
1981                 void __iomem *dsc;
1982 
1983                 if (ATM_SKB(skb)->vcc != vcc) continue;
1984                 dsc = tx->send+ENI_PRV_POS(skb)*4;
1985                 writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) |
1986                     (tx->prescaler << MID_SEG_PR_SHIFT) |
1987                     (tx->resolution << MID_SEG_RATE_SHIFT), dsc);
1988         }
1989         tasklet_enable(&eni_dev->task);
1990         return 0;
1991 }
1992 
1993 
1994 static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
1995 {
1996         struct eni_dev *eni_dev = ENI_DEV(dev);
1997 
1998         if (cmd == ENI_MEMDUMP) {
1999                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
2000                 printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d "
2001                     "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number);
2002                 dump(dev);
2003                 return 0;
2004         }
2005         if (cmd == ENI_SETMULT) {
2006                 struct eni_multipliers mult;
2007 
2008                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
2009                 if (copy_from_user(&mult, arg,
2010                     sizeof(struct eni_multipliers)))
2011                         return -EFAULT;
2012                 if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) ||
2013                     mult.tx > 65536 || mult.rx > 65536)
2014                         return -EINVAL;
2015                 if (mult.tx) eni_dev->tx_mult = mult.tx;
2016                 if (mult.rx) eni_dev->rx_mult = mult.rx;
2017                 return 0;
2018         }
2019         if (cmd == ATM_SETCIRANGE) {
2020                 struct atm_cirange ci;
2021 
2022                 if (copy_from_user(&ci, arg,sizeof(struct atm_cirange)))
2023                         return -EFAULT;
2024                 if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) &&
2025                     (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX))
2026                     return 0;
2027                 return -EINVAL;
2028         }
2029         if (!dev->phy->ioctl) return -ENOIOCTLCMD;
2030         return dev->phy->ioctl(dev,cmd,arg);
2031 }
2032 
2033 
2034 static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname,
2035     void __user *optval,int optlen)
2036 {
2037         return -EINVAL;
2038 }
2039 
2040 
2041 static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname,
2042     void __user *optval,unsigned int optlen)
2043 {
2044         return -EINVAL;
2045 }
2046 
2047 
2048 static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb)
2049 {
2050         enum enq_res res;
2051 
2052         DPRINTK(">eni_send\n");
2053         if (!ENI_VCC(vcc)->tx) {
2054                 if (vcc->pop) vcc->pop(vcc,skb);
2055                 else dev_kfree_skb(skb);
2056                 return -EINVAL;
2057         }
2058         if (!skb) {
2059                 printk(KERN_CRIT "!skb in eni_send ?\n");
2060                 if (vcc->pop) vcc->pop(vcc,skb);
2061                 return -EINVAL;
2062         }
2063         if (vcc->qos.aal == ATM_AAL0) {
2064                 if (skb->len != ATM_CELL_SIZE-1) {
2065                         if (vcc->pop) vcc->pop(vcc,skb);
2066                         else dev_kfree_skb(skb);
2067                         return -EINVAL;
2068                 }
2069                 *(u32 *) skb->data = htonl(*(u32 *) skb->data);
2070         }
2071 submitted++;
2072         ATM_SKB(skb)->vcc = vcc;
2073         tasklet_disable(&ENI_DEV(vcc->dev)->task);
2074         res = do_tx(skb);
2075         tasklet_enable(&ENI_DEV(vcc->dev)->task);
2076         if (res == enq_ok) return 0;
2077         skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb);
2078 backlogged++;
2079         tasklet_schedule(&ENI_DEV(vcc->dev)->task);
2080         return 0;
2081 }
2082 
2083 static void eni_phy_put(struct atm_dev *dev,unsigned char value,
2084     unsigned long addr)
2085 {
2086         writel(value,ENI_DEV(dev)->phy+addr*4);
2087 }
2088 
2089 
2090 
2091 static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr)
2092 {
2093         return readl(ENI_DEV(dev)->phy+addr*4);
2094 }
2095 
2096 
2097 static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page)
2098 {
2099         struct sock *s;
2100         static const char *signal[] = { "LOST","unknown","okay" };
2101         struct eni_dev *eni_dev = ENI_DEV(dev);
2102         struct atm_vcc *vcc;
2103         int left,i;
2104 
2105         left = *pos;
2106         if (!left)
2107                 return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, "
2108                     "%d cps remaining\n",dev->number,signal[(int) dev->signal],
2109                     eni_dev->mem >> 10,eni_dev->tx_bw);
2110         if (!--left)
2111                 return sprintf(page,"%4sBursts: TX"
2112 #if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \
2113     !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \
2114     !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \
2115     !defined(CONFIG_ATM_ENI_BURST_TX_2W)
2116                     " none"
2117 #endif
2118 #ifdef CONFIG_ATM_ENI_BURST_TX_16W
2119                     " 16W"
2120 #endif
2121 #ifdef CONFIG_ATM_ENI_BURST_TX_8W
2122                     " 8W"
2123 #endif
2124 #ifdef CONFIG_ATM_ENI_BURST_TX_4W
2125                     " 4W"
2126 #endif
2127 #ifdef CONFIG_ATM_ENI_BURST_TX_2W
2128                     " 2W"
2129 #endif
2130                     ", RX"
2131 #if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \
2132     !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \
2133     !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \
2134     !defined(CONFIG_ATM_ENI_BURST_RX_2W)
2135                     " none"
2136 #endif
2137 #ifdef CONFIG_ATM_ENI_BURST_RX_16W
2138                     " 16W"
2139 #endif
2140 #ifdef CONFIG_ATM_ENI_BURST_RX_8W
2141                     " 8W"
2142 #endif
2143 #ifdef CONFIG_ATM_ENI_BURST_RX_4W
2144                     " 4W"
2145 #endif
2146 #ifdef CONFIG_ATM_ENI_BURST_RX_2W
2147                     " 2W"
2148 #endif
2149 #ifndef CONFIG_ATM_ENI_TUNE_BURST
2150                     " (default)"
2151 #endif
2152                     "\n","");
2153         if (!--left) 
2154                 return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n",
2155                     "",eni_dev->tx_mult,eni_dev->rx_mult);
2156         for (i = 0; i < NR_CHAN; i++) {
2157                 struct eni_tx *tx = eni_dev->tx+i;
2158 
2159                 if (!tx->send) continue;
2160                 if (!--left) {
2161                         return sprintf(page, "tx[%d]:    0x%lx-0x%lx "
2162                             "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i,
2163                             (unsigned long) (tx->send - eni_dev->ram),
2164                             tx->send-eni_dev->ram+tx->words*4-1,tx->words*4,
2165                             tx->reserved,tx->shaping,
2166                             tx == eni_dev->ubr ? " (UBR)" : "");
2167                 }
2168                 if (--left) continue;
2169                 return sprintf(page,"%10sbacklog %u packets\n","",
2170                     skb_queue_len(&tx->backlog));
2171         }
2172         read_lock(&vcc_sklist_lock);
2173         for(i = 0; i < VCC_HTABLE_SIZE; ++i) {
2174                 struct hlist_head *head = &vcc_hash[i];
2175 
2176                 sk_for_each(s, head) {
2177                         struct eni_vcc *eni_vcc;
2178                         int length;
2179 
2180                         vcc = atm_sk(s);
2181                         if (vcc->dev != dev)
2182                                 continue;
2183                         eni_vcc = ENI_VCC(vcc);
2184                         if (--left) continue;
2185                         length = sprintf(page,"vcc %4d: ",vcc->vci);
2186                         if (eni_vcc->rx) {
2187                                 length += sprintf(page+length, "0x%lx-0x%lx "
2188                                     "(%6ld bytes)",
2189                                     (unsigned long) (eni_vcc->recv - eni_dev->ram),
2190                                     eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1,
2191                                     eni_vcc->words*4);
2192                                 if (eni_vcc->tx) length += sprintf(page+length,", ");
2193                         }
2194                         if (eni_vcc->tx)
2195                                 length += sprintf(page+length,"tx[%d], txing %d bytes",
2196                                     eni_vcc->tx->index,eni_vcc->txing);
2197                         page[length] = '\n';
2198                         read_unlock(&vcc_sklist_lock);
2199                         return length+1;
2200                 }
2201         }
2202         read_unlock(&vcc_sklist_lock);
2203         for (i = 0; i < eni_dev->free_len; i++) {
2204                 struct eni_free *fe = eni_dev->free_list+i;
2205                 unsigned long offset;
2206 
2207                 if (--left) continue;
2208                 offset = (unsigned long) eni_dev->ram+eni_dev->base_diff;
2209                 return sprintf(page,"free      %p-%p (%6d bytes)\n",
2210                     fe->start-offset,fe->start-offset+(1 << fe->order)-1,
2211                     1 << fe->order);
2212         }
2213         return 0;
2214 }
2215 
2216 
2217 static const struct atmdev_ops ops = {
2218         .open           = eni_open,
2219         .close          = eni_close,
2220         .ioctl          = eni_ioctl,
2221         .getsockopt     = eni_getsockopt,
2222         .setsockopt     = eni_setsockopt,
2223         .send           = eni_send,
2224         .phy_put        = eni_phy_put,
2225         .phy_get        = eni_phy_get,
2226         .change_qos     = eni_change_qos,
2227         .proc_read      = eni_proc_read
2228 };
2229 
2230 
2231 static int eni_init_one(struct pci_dev *pci_dev,
2232                         const struct pci_device_id *ent)
2233 {
2234         struct atm_dev *dev;
2235         struct eni_dev *eni_dev;
2236         struct eni_zero *zero;
2237         int rc;
2238 
2239         rc = pci_enable_device(pci_dev);
2240         if (rc < 0)
2241                 goto out;
2242 
2243         rc = -ENOMEM;
2244         eni_dev = kmalloc(sizeof(struct eni_dev), GFP_KERNEL);
2245         if (!eni_dev)
2246                 goto err_disable;
2247 
2248         zero = &eni_dev->zero;
2249         zero->addr = pci_alloc_consistent(pci_dev, ENI_ZEROES_SIZE, &zero->dma);
2250         if (!zero->addr)
2251                 goto err_kfree;
2252 
2253         dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL);
2254         if (!dev)
2255                 goto err_free_consistent;
2256 
2257         dev->dev_data = eni_dev;
2258         pci_set_drvdata(pci_dev, dev);
2259         eni_dev->pci_dev = pci_dev;
2260         eni_dev->asic = ent->driver_data;
2261 
2262         rc = eni_do_init(dev);
2263         if (rc < 0)
2264                 goto err_unregister;
2265 
2266         rc = eni_start(dev);
2267         if (rc < 0)
2268                 goto err_eni_release;
2269 
2270         eni_dev->more = eni_boards;
2271         eni_boards = dev;
2272 out:
2273         return rc;
2274 
2275 err_eni_release:
2276         eni_do_release(dev);
2277 err_unregister:
2278         atm_dev_deregister(dev);
2279 err_free_consistent:
2280         pci_free_consistent(pci_dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2281 err_kfree:
2282         kfree(eni_dev);
2283 err_disable:
2284         pci_disable_device(pci_dev);
2285         goto out;
2286 }
2287 
2288 
2289 static struct pci_device_id eni_pci_tbl[] = {
2290         { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_FPGA), 0 /* FPGA */ },
2291         { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_ASIC), 1 /* ASIC */ },
2292         { 0, }
2293 };
2294 MODULE_DEVICE_TABLE(pci,eni_pci_tbl);
2295 
2296 
2297 static void eni_remove_one(struct pci_dev *pdev)
2298 {
2299         struct atm_dev *dev = pci_get_drvdata(pdev);
2300         struct eni_dev *ed = ENI_DEV(dev);
2301         struct eni_zero *zero = &ed->zero;
2302 
2303         eni_do_release(dev);
2304         atm_dev_deregister(dev);
2305         pci_free_consistent(pdev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2306         kfree(ed);
2307         pci_disable_device(pdev);
2308 }
2309 
2310 
2311 static struct pci_driver eni_driver = {
2312         .name           = DEV_LABEL,
2313         .id_table       = eni_pci_tbl,
2314         .probe          = eni_init_one,
2315         .remove         = eni_remove_one,
2316 };
2317 
2318 
2319 static int __init eni_init(void)
2320 {
2321         struct sk_buff *skb; /* dummy for sizeof */
2322 
2323         if (sizeof(skb->cb) < sizeof(struct eni_skb_prv)) {
2324                 printk(KERN_ERR "eni_detect: skb->cb is too small (%Zd < %Zd)\n",
2325                     sizeof(skb->cb),sizeof(struct eni_skb_prv));
2326                 return -EIO;
2327         }
2328         return pci_register_driver(&eni_driver);
2329 }
2330 
2331 
2332 module_init(eni_init);
2333 /* @@@ since exit routine not defined, this module can not be unloaded */
2334 
2335 MODULE_LICENSE("GPL");
2336 

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