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eni.c
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1 /* drivers/atm/eni.c - Efficient Networks ENI155P device driver */
2 
3 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
4 
5 
6 #include <linux/module.h>
7 #include <linux/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)-'0';
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[] __devinitconst = {
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 __devinit 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 __devinit 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 __devinit 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 __devinit 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 hlist_node *node;
2097  struct sock *s;
2098  static const char *signal[] = { "LOST","unknown","okay" };
2099  struct eni_dev *eni_dev = ENI_DEV(dev);
2100  struct atm_vcc *vcc;
2101  int left,i;
2102 
2103  left = *pos;
2104  if (!left)
2105  return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, "
2106  "%d cps remaining\n",dev->number,signal[(int) dev->signal],
2107  eni_dev->mem >> 10,eni_dev->tx_bw);
2108  if (!--left)
2109  return sprintf(page,"%4sBursts: TX"
2110 #if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \
2111  !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \
2112  !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \
2113  !defined(CONFIG_ATM_ENI_BURST_TX_2W)
2114  " none"
2115 #endif
2116 #ifdef CONFIG_ATM_ENI_BURST_TX_16W
2117  " 16W"
2118 #endif
2119 #ifdef CONFIG_ATM_ENI_BURST_TX_8W
2120  " 8W"
2121 #endif
2122 #ifdef CONFIG_ATM_ENI_BURST_TX_4W
2123  " 4W"
2124 #endif
2125 #ifdef CONFIG_ATM_ENI_BURST_TX_2W
2126  " 2W"
2127 #endif
2128  ", RX"
2129 #if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \
2130  !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \
2131  !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \
2132  !defined(CONFIG_ATM_ENI_BURST_RX_2W)
2133  " none"
2134 #endif
2135 #ifdef CONFIG_ATM_ENI_BURST_RX_16W
2136  " 16W"
2137 #endif
2138 #ifdef CONFIG_ATM_ENI_BURST_RX_8W
2139  " 8W"
2140 #endif
2141 #ifdef CONFIG_ATM_ENI_BURST_RX_4W
2142  " 4W"
2143 #endif
2144 #ifdef CONFIG_ATM_ENI_BURST_RX_2W
2145  " 2W"
2146 #endif
2147 #ifndef CONFIG_ATM_ENI_TUNE_BURST
2148  " (default)"
2149 #endif
2150  "\n","");
2151  if (!--left)
2152  return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n",
2153  "",eni_dev->tx_mult,eni_dev->rx_mult);
2154  for (i = 0; i < NR_CHAN; i++) {
2155  struct eni_tx *tx = eni_dev->tx+i;
2156 
2157  if (!tx->send) continue;
2158  if (!--left) {
2159  return sprintf(page,"tx[%d]: 0x%ld-0x%ld "
2160  "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i,
2161  (unsigned long) (tx->send - eni_dev->ram),
2162  tx->send-eni_dev->ram+tx->words*4-1,tx->words*4,
2163  tx->reserved,tx->shaping,
2164  tx == eni_dev->ubr ? " (UBR)" : "");
2165  }
2166  if (--left) continue;
2167  return sprintf(page,"%10sbacklog %u packets\n","",
2168  skb_queue_len(&tx->backlog));
2169  }
2170  read_lock(&vcc_sklist_lock);
2171  for(i = 0; i < VCC_HTABLE_SIZE; ++i) {
2172  struct hlist_head *head = &vcc_hash[i];
2173 
2174  sk_for_each(s, node, head) {
2175  struct eni_vcc *eni_vcc;
2176  int length;
2177 
2178  vcc = atm_sk(s);
2179  if (vcc->dev != dev)
2180  continue;
2181  eni_vcc = ENI_VCC(vcc);
2182  if (--left) continue;
2183  length = sprintf(page,"vcc %4d: ",vcc->vci);
2184  if (eni_vcc->rx) {
2185  length += sprintf(page+length,"0x%ld-0x%ld "
2186  "(%6ld bytes)",
2187  (unsigned long) (eni_vcc->recv - eni_dev->ram),
2188  eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1,
2189  eni_vcc->words*4);
2190  if (eni_vcc->tx) length += sprintf(page+length,", ");
2191  }
2192  if (eni_vcc->tx)
2193  length += sprintf(page+length,"tx[%d], txing %d bytes",
2194  eni_vcc->tx->index,eni_vcc->txing);
2195  page[length] = '\n';
2196  read_unlock(&vcc_sklist_lock);
2197  return length+1;
2198  }
2199  }
2200  read_unlock(&vcc_sklist_lock);
2201  for (i = 0; i < eni_dev->free_len; i++) {
2202  struct eni_free *fe = eni_dev->free_list+i;
2203  unsigned long offset;
2204 
2205  if (--left) continue;
2206  offset = (unsigned long) eni_dev->ram+eni_dev->base_diff;
2207  return sprintf(page,"free %p-%p (%6d bytes)\n",
2208  fe->start-offset,fe->start-offset+(1 << fe->order)-1,
2209  1 << fe->order);
2210  }
2211  return 0;
2212 }
2213 
2214 
2215 static const struct atmdev_ops ops = {
2216  .open = eni_open,
2217  .close = eni_close,
2218  .ioctl = eni_ioctl,
2219  .getsockopt = eni_getsockopt,
2220  .setsockopt = eni_setsockopt,
2221  .send = eni_send,
2222  .phy_put = eni_phy_put,
2223  .phy_get = eni_phy_get,
2224  .change_qos = eni_change_qos,
2225  .proc_read = eni_proc_read
2226 };
2227 
2228 
2229 static int __devinit eni_init_one(struct pci_dev *pci_dev,
2230  const struct pci_device_id *ent)
2231 {
2232  struct atm_dev *dev;
2233  struct eni_dev *eni_dev;
2234  struct eni_zero *zero;
2235  int rc;
2236 
2237  rc = pci_enable_device(pci_dev);
2238  if (rc < 0)
2239  goto out;
2240 
2241  rc = -ENOMEM;
2242  eni_dev = kmalloc(sizeof(struct eni_dev), GFP_KERNEL);
2243  if (!eni_dev)
2244  goto err_disable;
2245 
2246  zero = &eni_dev->zero;
2247  zero->addr = pci_alloc_consistent(pci_dev, ENI_ZEROES_SIZE, &zero->dma);
2248  if (!zero->addr)
2249  goto err_kfree;
2250 
2251  dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL);
2252  if (!dev)
2253  goto err_free_consistent;
2254 
2255  dev->dev_data = eni_dev;
2256  pci_set_drvdata(pci_dev, dev);
2257  eni_dev->pci_dev = pci_dev;
2258  eni_dev->asic = ent->driver_data;
2259 
2260  rc = eni_do_init(dev);
2261  if (rc < 0)
2262  goto err_unregister;
2263 
2264  rc = eni_start(dev);
2265  if (rc < 0)
2266  goto err_eni_release;
2267 
2268  eni_dev->more = eni_boards;
2269  eni_boards = dev;
2270 out:
2271  return rc;
2272 
2273 err_eni_release:
2274  eni_do_release(dev);
2275 err_unregister:
2276  atm_dev_deregister(dev);
2277 err_free_consistent:
2278  pci_free_consistent(pci_dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2279 err_kfree:
2280  kfree(eni_dev);
2281 err_disable:
2282  pci_disable_device(pci_dev);
2283  goto out;
2284 }
2285 
2286 
2287 static struct pci_device_id eni_pci_tbl[] = {
2288  { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_FPGA), 0 /* FPGA */ },
2289  { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_ASIC), 1 /* ASIC */ },
2290  { 0, }
2291 };
2292 MODULE_DEVICE_TABLE(pci,eni_pci_tbl);
2293 
2294 
2295 static void __devexit eni_remove_one(struct pci_dev *pdev)
2296 {
2297  struct atm_dev *dev = pci_get_drvdata(pdev);
2298  struct eni_dev *ed = ENI_DEV(dev);
2299  struct eni_zero *zero = &ed->zero;
2300 
2301  eni_do_release(dev);
2302  atm_dev_deregister(dev);
2303  pci_free_consistent(pdev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2304  kfree(ed);
2305  pci_disable_device(pdev);
2306 }
2307 
2308 
2309 static struct pci_driver eni_driver = {
2310  .name = DEV_LABEL,
2311  .id_table = eni_pci_tbl,
2312  .probe = eni_init_one,
2313  .remove = __devexit_p(eni_remove_one),
2314 };
2315 
2316 
2317 static int __init eni_init(void)
2318 {
2319  struct sk_buff *skb; /* dummy for sizeof */
2320 
2321  if (sizeof(skb->cb) < sizeof(struct eni_skb_prv)) {
2322  printk(KERN_ERR "eni_detect: skb->cb is too small (%Zd < %Zd)\n",
2323  sizeof(skb->cb),sizeof(struct eni_skb_prv));
2324  return -EIO;
2325  }
2326  return pci_register_driver(&eni_driver);
2327 }
2328 
2329 
2330 module_init(eni_init);
2331 /* @@@ since exit routine not defined, this module can not be unloaded */
2332 
2333 MODULE_LICENSE("GPL");
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