Version:  2.0.40 2.2.26 2.4.37 3.2 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

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

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