File: /usr/src/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/config.h>
8 #include <linux/kernel.h>
9 #include <linux/mm.h>
10 #include <linux/pci.h>
11 #include <linux/errno.h>
12 #include <linux/atm.h>
13 #include <linux/atmdev.h>
14 #include <linux/sonet.h>
15 #include <linux/skbuff.h>
16 #include <linux/time.h>
17 #include <linux/sched.h> /* for xtime */
18 #include <linux/delay.h>
19 #include <linux/uio.h>
20 #include <linux/init.h>
21 #include <linux/atm_eni.h>
22 #include <linux/bitops.h>
23 #include <asm/system.h>
24 #include <asm/io.h>
25 #include <asm/atomic.h>
26 #include <asm/uaccess.h>
27 #include <asm/string.h>
28 #include <asm/byteorder.h>
29
30 #include "tonga.h"
31 #include "midway.h"
32 #include "suni.h"
33 #include "eni.h"
34
35 #if !defined(__i386__) && !defined(__x86_64__)
36 #ifndef ioremap_nocache
37 #define ioremap_nocache(X,Y) ioremap(X,Y)
38 #endif
39 #endif
40
41 /*
42 * TODO:
43 *
44 * Show stoppers
45 * none
46 *
47 * Minor
48 * - OAM support
49 * - fix bugs listed below
50 */
51
52 /*
53 * KNOWN BUGS:
54 *
55 * - may run into JK-JK bug and deadlock
56 * - should allocate UBR channel first
57 * - buffer space allocation algorithm is stupid
58 * (RX: should be maxSDU+maxdelay*rate
59 * TX: should be maxSDU+min(maxSDU,maxdelay*rate) )
60 * - doesn't support OAM cells
61 * - eni_put_free may hang if not putting memory fragments that _complete_
62 * 2^n block (never happens in real life, though)
63 * - keeps IRQ even if initialization fails
64 */
65
66
67 #if 0
68 #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
69 #else
70 #define DPRINTK(format,args...)
71 #endif
72
73
74 #ifndef CONFIG_ATM_ENI_TUNE_BURST
75 #define CONFIG_ATM_ENI_BURST_TX_8W
76 #define CONFIG_ATM_ENI_BURST_RX_4W
77 #endif
78
79
80 #ifndef CONFIG_ATM_ENI_DEBUG
81
82
83 #define NULLCHECK(x)
84
85 #define EVENT(s,a,b)
86
87
88 static void event_dump(void)
89 {
90 }
91
92
93 #else
94
95
96 /*
97 * NULL pointer checking
98 */
99
100 #define NULLCHECK(x) \
101 if ((unsigned long) (x) < 0x30) \
102 printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x))
103
104 /*
105 * Very extensive activity logging. Greatly improves bug detection speed but
106 * costs a few Mbps if enabled.
107 */
108
109 #define EV 64
110
111 static const char *ev[EV];
112 static unsigned long ev_a[EV],ev_b[EV];
113 static int ec = 0;
114
115
116 static void EVENT(const char *s,unsigned long a,unsigned long b)
117 {
118 ev[ec] = s;
119 ev_a[ec] = a;
120 ev_b[ec] = b;
121 ec = (ec+1) % EV;
122 }
123
124
125 static void event_dump(void)
126 {
127 int n,i;
128
129 for (n = 0; n < EV; n++) {
130 i = (ec+n) % EV;
131 printk(KERN_NOTICE);
132 printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]);
133 }
134 }
135
136
137 #endif /* CONFIG_ATM_ENI_DEBUG */
138
139
140 /*
141 * NExx must not be equal at end
142 * EExx may be equal at end
143 * xxPJOK verify validity of pointer jumps
144 * xxPMOK operating on a circular buffer of "c" words
145 */
146
147 #define NEPJOK(a0,a1,b) \
148 ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1))
149 #define EEPJOK(a0,a1,b) \
150 ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1))
151 #define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b)
152 #define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b)
153
154
155 static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0,
156 backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0,
157 putting = 0;
158
159 static struct atm_dev *eni_boards = NULL;
160
161 static u32 *cpu_zeroes = NULL; /* aligned "magic" zeroes */
162 static dma_addr_t zeroes;
163
164 /* Read/write registers on card */
165 #define eni_in(r) readl(eni_dev->reg+(r)*4)
166 #define eni_out(v,r) writel((v),eni_dev->reg+(r)*4)
167
168
169 /*-------------------------------- utilities --------------------------------*/
170
171
172 static void dump_mem(struct eni_dev *eni_dev)
173 {
174 int i;
175
176 for (i = 0; i < eni_dev->free_len; i++)
177 printk(KERN_DEBUG " %d: 0x%lx %d\n",i,
178 eni_dev->free_list[i].start,
179 1 << eni_dev->free_list[i].order);
180 }
181
182
183 static void dump(struct atm_dev *dev)
184 {
185 struct eni_dev *eni_dev;
186
187 int i;
188
189 eni_dev = ENI_DEV(dev);
190 printk(KERN_NOTICE "Free memory\n");
191 dump_mem(eni_dev);
192 printk(KERN_NOTICE "TX buffers\n");
193 for (i = 0; i < NR_CHAN; i++)
194 if (eni_dev->tx[i].send)
195 printk(KERN_NOTICE " TX %d @ 0x%lx: %ld\n",i,
196 eni_dev->tx[i].send,eni_dev->tx[i].words*4);
197 printk(KERN_NOTICE "RX buffers\n");
198 for (i = 0; i < 1024; i++)
199 if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx)
200 printk(KERN_NOTICE " RX %d @ 0x%lx: %ld\n",i,
201 ENI_VCC(eni_dev->rx_map[i])->recv,
202 ENI_VCC(eni_dev->rx_map[i])->words*4);
203 printk(KERN_NOTICE "----\n");
204 }
205
206
207 static void eni_put_free(struct eni_dev *eni_dev,unsigned long start,
208 unsigned long size)
209 {
210 struct eni_free *list;
211 int len,order;
212
213 DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size);
214 start += eni_dev->base_diff;
215 list = eni_dev->free_list;
216 len = eni_dev->free_len;
217 while (size) {
218 if (len >= eni_dev->free_list_size) {
219 printk(KERN_CRIT "eni_put_free overflow (0x%lx,%ld)\n",
220 start,size);
221 break;
222 }
223 for (order = 0; !((start | size) & (1 << order)); order++);
224 if (MID_MIN_BUF_SIZE > (1 << order)) {
225 printk(KERN_CRIT "eni_put_free: order %d too small\n",
226 order);
227 break;
228 }
229 list[len].start = start;
230 list[len].order = order;
231 len++;
232 start += 1 << order;
233 size -= 1 << order;
234 }
235 eni_dev->free_len = len;
236 /*dump_mem(eni_dev);*/
237 }
238
239
240 static unsigned long eni_alloc_mem(struct eni_dev *eni_dev,unsigned long *size)
241 {
242 struct eni_free *list;
243 unsigned long start;
244 int len,i,order,best_order,index;
245
246 list = eni_dev->free_list;
247 len = eni_dev->free_len;
248 if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE;
249 if (*size > MID_MAX_BUF_SIZE) return 0;
250 for (order = 0; (1 << order) < *size; order++);
251 DPRINTK("trying: %ld->%d\n",*size,order);
252 best_order = 65; /* we don't have more than 2^64 of anything ... */
253 index = 0; /* silence GCC */
254 for (i = 0; i < len; i++)
255 if (list[i].order == order) {
256 best_order = order;
257 index = i;
258 break;
259 }
260 else if (best_order > list[i].order && list[i].order > order) {
261 best_order = list[i].order;
262 index = i;
263 }
264 if (best_order == 65) return 0;
265 start = list[index].start-eni_dev->base_diff;
266 list[index] = list[--len];
267 eni_dev->free_len = len;
268 *size = 1 << order;
269 eni_put_free(eni_dev,start+*size,(1 << best_order)-*size);
270 DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start);
271 memset_io(start,0,*size); /* never leak data */
272 /*dump_mem(eni_dev);*/
273 return start;
274 }
275
276
277 static void eni_free_mem(struct eni_dev *eni_dev,unsigned long start,
278 unsigned long size)
279 {
280 struct eni_free *list;
281 int len,i,order;
282
283 start += eni_dev->base_diff;
284 list = eni_dev->free_list;
285 len = eni_dev->free_len;
286 for (order = -1; size; order++) size >>= 1;
287 DPRINTK("eni_free_mem: 0x%lx+0x%lx (order %d)\n",start,size,order);
288 for (i = 0; i < len; i++)
289 if (list[i].start == (start^(1 << order)) &&
290 list[i].order == order) {
291 DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i,
292 list[i].start,start,1 << order,list[i].order,order);
293 list[i] = list[--len];
294 start &= ~(unsigned long) (1 << order);
295 order++;
296 i = -1;
297 continue;
298 }
299 if (len >= eni_dev->free_list_size) {
300 printk(KERN_ALERT "eni_free_mem overflow (0x%lx,%d)\n",start,
301 order);
302 return;
303 }
304 list[len].start = start;
305 list[len].order = order;
306 eni_dev->free_len = len+1;
307 /*dump_mem(eni_dev);*/
308 }
309
310
311 /*----------------------------------- RX ------------------------------------*/
312
313
314 #define ENI_VCC_NOS ((struct atm_vcc *) 1)
315
316
317 static void rx_ident_err(struct atm_vcc *vcc)
318 {
319 struct atm_dev *dev;
320 struct eni_dev *eni_dev;
321 struct eni_vcc *eni_vcc;
322
323 dev = vcc->dev;
324 eni_dev = ENI_DEV(dev);
325 /* immediately halt adapter */
326 eni_out(eni_in(MID_MC_S) &
327 ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S);
328 /* dump useful information */
329 eni_vcc = ENI_VCC(vcc);
330 printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident "
331 "mismatch\n",dev->number);
332 printk(KERN_ALERT " VCI %d, rxing %d, words %ld\n",vcc->vci,
333 eni_vcc->rxing,eni_vcc->words);
334 printk(KERN_ALERT " host descr 0x%lx, rx pos 0x%lx, descr value "
335 "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos,
336 (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4));
337 printk(KERN_ALERT " last 0x%p, servicing %d\n",eni_vcc->last,
338 eni_vcc->servicing);
339 EVENT("---dump ends here---\n",0,0);
340 printk(KERN_NOTICE "---recent events---\n");
341 event_dump();
342 ENI_DEV(dev)->fast = NULL; /* really stop it */
343 ENI_DEV(dev)->slow = NULL;
344 skb_queue_head_init(&ENI_DEV(dev)->rx_queue);
345 }
346
347
348 static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb,
349 unsigned long skip,unsigned long size,unsigned long eff)
350 {
351 struct eni_dev *eni_dev;
352 struct eni_vcc *eni_vcc;
353 u32 dma_rd,dma_wr;
354 u32 dma[RX_DMA_BUF*2];
355 dma_addr_t paddr;
356 unsigned long here;
357 int i,j;
358
359 eni_dev = ENI_DEV(vcc->dev);
360 eni_vcc = ENI_VCC(vcc);
361 paddr = 0; /* GCC, shut up */
362 if (skb) {
363 paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len,
364 PCI_DMA_FROMDEVICE);
365 ENI_PRV_PADDR(skb) = paddr;
366 if (paddr & 3)
367 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has "
368 "mis-aligned RX data (0x%lx)\n",vcc->dev->number,
369 vcc->vci,(unsigned long) paddr);
370 ENI_PRV_SIZE(skb) = size+skip;
371 /* PDU plus descriptor */
372 ATM_SKB(skb)->vcc = vcc;
373 }
374 j = 0;
375 if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */
376 here = (eni_vcc->descr+skip) & (eni_vcc->words-1);
377 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci
378 << MID_DMA_VCI_SHIFT) | MID_DT_JK;
379 j++;
380 }
381 here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1);
382 if (!eff) size += skip;
383 else {
384 unsigned long words;
385
386 if (!size) {
387 DPRINTK("strange things happen ...\n");
388 EVENT("strange things happen ... (skip=%ld,eff=%ld)\n",
389 size,eff);
390 }
391 words = eff;
392 if (paddr & 15) {
393 unsigned long init;
394
395 init = 4-((paddr & 15) >> 2);
396 if (init > words) init = words;
397 dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
398 (vcc->vci << MID_DMA_VCI_SHIFT);
399 dma[j++] = paddr;
400 paddr += init << 2;
401 words -= init;
402 }
403 #ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */
404 if (words & ~15) {
405 dma[j++] = MID_DT_16W | ((words >> 4) <<
406 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
407 MID_DMA_VCI_SHIFT);
408 dma[j++] = paddr;
409 paddr += (words & ~15) << 2;
410 words &= 15;
411 }
412 #endif
413 #ifdef CONFIG_ATM_ENI_BURST_RX_8W /* works only with *some* PCI chipsets ... */
414 if (words & ~7) {
415 dma[j++] = MID_DT_8W | ((words >> 3) <<
416 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
417 MID_DMA_VCI_SHIFT);
418 dma[j++] = paddr;
419 paddr += (words & ~7) << 2;
420 words &= 7;
421 }
422 #endif
423 #ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */
424 if (words & ~3) {
425 dma[j++] = MID_DT_4W | ((words >> 2) <<
426 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
427 MID_DMA_VCI_SHIFT);
428 dma[j++] = paddr;
429 paddr += (words & ~3) << 2;
430 words &= 3;
431 }
432 #endif
433 #ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */
434 if (words & ~1) {
435 dma[j++] = MID_DT_2W | ((words >> 1) <<
436 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
437 MID_DMA_VCI_SHIFT);
438 dma[j++] = paddr;
439 paddr += (words & ~1) << 2;
440 words &= 1;
441 }
442 #endif
443 if (words) {
444 dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT)
445 | (vcc->vci << MID_DMA_VCI_SHIFT);
446 dma[j++] = paddr;
447 }
448 }
449 if (size != eff) {
450 dma[j++] = (here << MID_DMA_COUNT_SHIFT) |
451 (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK;
452 j++;
453 }
454 if (!j || j > 2*RX_DMA_BUF) {
455 printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n");
456 goto trouble;
457 }
458 dma[j-2] |= MID_DMA_END;
459 j = j >> 1;
460 dma_wr = eni_in(MID_DMA_WR_RX);
461 dma_rd = eni_in(MID_DMA_RD_RX);
462 /*
463 * Can I move the dma_wr pointer by 2j+1 positions without overwriting
464 * data that hasn't been read (position of dma_rd) yet ?
465 */
466 if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */
467 printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n",
468 vcc->dev->number);
469 goto trouble;
470 }
471 for (i = 0; i < j; i++) {
472 writel(dma[i*2],eni_dev->rx_dma+dma_wr*8);
473 writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4);
474 dma_wr = (dma_wr+1) & (NR_DMA_RX-1);
475 }
476 if (skb) {
477 ENI_PRV_POS(skb) = eni_vcc->descr+size+1;
478 skb_queue_tail(&eni_dev->rx_queue,skb);
479 eni_vcc->last = skb;
480 rx_enqueued++;
481 }
482 eni_vcc->descr = here;
483 eni_out(dma_wr,MID_DMA_WR_RX);
484 return 0;
485
486 trouble:
487 if (paddr)
488 pci_unmap_single(eni_dev->pci_dev,paddr,skb->len,
489 PCI_DMA_FROMDEVICE);
490 if (skb) dev_kfree_skb_irq(skb);
491 return -1;
492 }
493
494
495 static void discard(struct atm_vcc *vcc,unsigned long size)
496 {
497 struct eni_vcc *eni_vcc;
498
499 eni_vcc = ENI_VCC(vcc);
500 EVENT("discard (size=%ld)\n",size,0);
501 while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0);
502 /* could do a full fallback, but that might be more expensive */
503 if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1;
504 else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1);
505 }
506
507
508 /*
509 * TODO: should check whether direct copies (without DMA setup, dequeuing on
510 * interrupt, etc.) aren't much faster for AAL0
511 */
512
513 static int rx_aal0(struct atm_vcc *vcc)
514 {
515 struct eni_vcc *eni_vcc;
516 unsigned long descr;
517 unsigned long length;
518 struct sk_buff *skb;
519
520 DPRINTK(">rx_aal0\n");
521 eni_vcc = ENI_VCC(vcc);
522 descr = readl(eni_vcc->recv+eni_vcc->descr*4);
523 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
524 rx_ident_err(vcc);
525 return 1;
526 }
527 if (descr & MID_RED_T) {
528 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
529 vcc->dev->number);
530 length = 0;
531 atomic_inc(&vcc->stats->rx_err);
532 }
533 else {
534 length = ATM_CELL_SIZE-1; /* no HEC */
535 }
536 skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL;
537 if (!skb) {
538 discard(vcc,length >> 2);
539 return 0;
540 }
541 skb_put(skb,length);
542 skb->stamp = eni_vcc->timestamp;
543 DPRINTK("got len %ld\n",length);
544 if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1;
545 eni_vcc->rxing++;
546 return 0;
547 }
548
549
550 static int rx_aal5(struct atm_vcc *vcc)
551 {
552 struct eni_vcc *eni_vcc;
553 unsigned long descr;
554 unsigned long size,eff,length;
555 struct sk_buff *skb;
556
557 EVENT("rx_aal5\n",0,0);
558 DPRINTK(">rx_aal5\n");
559 eni_vcc = ENI_VCC(vcc);
560 descr = readl(eni_vcc->recv+eni_vcc->descr*4);
561 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
562 rx_ident_err(vcc);
563 return 1;
564 }
565 if (descr & (MID_RED_T | MID_RED_CRC_ERR)) {
566 if (descr & MID_RED_T) {
567 EVENT("empty cell (descr=0x%lx)\n",descr,0);
568 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
569 vcc->dev->number);
570 size = 0;
571 }
572 else {
573 static unsigned long silence = 0;
574
575 if (time_after(jiffies, silence) || silence == 0) {
576 printk(KERN_WARNING DEV_LABEL "(itf %d): "
577 "discarding PDU(s) with CRC error\n",
578 vcc->dev->number);
579 silence = (jiffies+2*HZ)|1;
580 }
581 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
582 EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr,
583 size);
584 }
585 eff = length = 0;
586 atomic_inc(&vcc->stats->rx_err);
587 }
588 else {
589 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
590 DPRINTK("size=%ld\n",size);
591 length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) &
592 (eni_vcc->words-1)))*4) & 0xffff;
593 /* -trailer(2)+header(1) */
594 if (length && length <= (size << 2)-8 && length <=
595 ATM_MAX_AAL5_PDU) eff = (length+3) >> 2;
596 else { /* ^ trailer length (8) */
597 EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr,
598 length);
599 printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU "
600 "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n",
601 vcc->dev->number,vcc->vci,length,size << 2,descr);
602 length = eff = 0;
603 atomic_inc(&vcc->stats->rx_err);
604 }
605 }
606 skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL;
607 if (!skb) {
608 discard(vcc,size);
609 return 0;
610 }
611 skb_put(skb,length);
612 DPRINTK("got len %ld\n",length);
613 if (do_rx_dma(vcc,skb,1,size,eff)) return 1;
614 eni_vcc->rxing++;
615 return 0;
616 }
617
618
619 static inline int rx_vcc(struct atm_vcc *vcc)
620 {
621 unsigned long vci_dsc,tmp;
622 struct eni_vcc *eni_vcc;
623
624 eni_vcc = ENI_VCC(vcc);
625 vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16;
626 EVENT("rx_vcc(1)\n",0,0);
627 while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >>
628 MID_VCI_DESCR_SHIFT)) {
629 EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n",
630 eni_vcc->descr,tmp);
631 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
632 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
633 MID_VCI_DESCR_SHIFT));
634 if (ENI_VCC(vcc)->rx(vcc)) return 1;
635 }
636 /* clear IN_SERVICE flag */
637 writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc);
638 /*
639 * If new data has arrived between evaluating the while condition and
640 * clearing IN_SERVICE, we wouldn't be notified until additional data
641 * follows. So we have to loop again to be sure.
642 */
643 EVENT("rx_vcc(3)\n",0,0);
644 while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR)
645 >> MID_VCI_DESCR_SHIFT)) {
646 EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n",
647 eni_vcc->descr,tmp);
648 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
649 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
650 MID_VCI_DESCR_SHIFT));
651 if (ENI_VCC(vcc)->rx(vcc)) return 1;
652 }
653 return 0;
654 }
655
656
657 static void poll_rx(struct atm_dev *dev)
658 {
659 struct eni_dev *eni_dev;
660 struct atm_vcc *curr;
661
662 eni_dev = ENI_DEV(dev);
663 while ((curr = eni_dev->fast)) {
664 EVENT("poll_rx.fast\n",0,0);
665 if (rx_vcc(curr)) return;
666 eni_dev->fast = ENI_VCC(curr)->next;
667 ENI_VCC(curr)->next = ENI_VCC_NOS;
668 barrier();
669 ENI_VCC(curr)->servicing--;
670 }
671 while ((curr = eni_dev->slow)) {
672 EVENT("poll_rx.slow\n",0,0);
673 if (rx_vcc(curr)) return;
674 eni_dev->slow = ENI_VCC(curr)->next;
675 ENI_VCC(curr)->next = ENI_VCC_NOS;
676 barrier();
677 ENI_VCC(curr)->servicing--;
678 }
679 }
680
681
682 static void get_service(struct atm_dev *dev)
683 {
684 struct eni_dev *eni_dev;
685 struct atm_vcc *vcc;
686 unsigned long vci;
687
688 DPRINTK(">get_service\n");
689 eni_dev = ENI_DEV(dev);
690 while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) {
691 vci = readl(eni_dev->service+eni_dev->serv_read*4);
692 eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1);
693 vcc = eni_dev->rx_map[vci & 1023];
694 if (!vcc) {
695 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not "
696 "found\n",dev->number,vci);
697 continue; /* nasty but we try to go on anyway */
698 /* @@@ nope, doesn't work */
699 }
700 EVENT("getting from service\n",0,0);
701 if (ENI_VCC(vcc)->next != ENI_VCC_NOS) {
702 EVENT("double service\n",0,0);
703 DPRINTK("Grr, servicing VCC %ld twice\n",vci);
704 continue;
705 }
706 ENI_VCC(vcc)->timestamp = xtime;
707 ENI_VCC(vcc)->next = NULL;
708 if (vcc->qos.rxtp.traffic_class == ATM_CBR) {
709 if (eni_dev->fast)
710 ENI_VCC(eni_dev->last_fast)->next = vcc;
711 else eni_dev->fast = vcc;
712 eni_dev->last_fast = vcc;
713 }
714 else {
715 if (eni_dev->slow)
716 ENI_VCC(eni_dev->last_slow)->next = vcc;
717 else eni_dev->slow = vcc;
718 eni_dev->last_slow = vcc;
719 }
720 putting++;
721 ENI_VCC(vcc)->servicing++;
722 }
723 }
724
725
726 static void dequeue_rx(struct atm_dev *dev)
727 {
728 struct eni_dev *eni_dev;
729 struct eni_vcc *eni_vcc;
730 struct atm_vcc *vcc;
731 struct sk_buff *skb;
732 unsigned long vci_dsc;
733 int first;
734
735 eni_dev = ENI_DEV(dev);
736 first = 1;
737 while (1) {
738 skb = skb_dequeue(&eni_dev->rx_queue);
739 if (!skb) {
740 if (first) {
741 DPRINTK(DEV_LABEL "(itf %d): RX but not "
742 "rxing\n",dev->number);
743 EVENT("nothing to dequeue\n",0,0);
744 }
745 break;
746 }
747 EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb),
748 ENI_PRV_POS(skb));
749 rx_dequeued++;
750 vcc = ATM_SKB(skb)->vcc;
751 eni_vcc = ENI_VCC(vcc);
752 first = 0;
753 vci_dsc = eni_dev->vci+vcc->vci*16;
754 if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb),
755 (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT,
756 eni_vcc->words)) {
757 EVENT("requeuing\n",0,0);
758 skb_queue_head(&eni_dev->rx_queue,skb);
759 break;
760 }
761 eni_vcc->rxing--;
762 eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1);
763 pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len,
764 PCI_DMA_TODEVICE);
765 if (!skb->len) dev_kfree_skb_irq(skb);
766 else {
767 EVENT("pushing (len=%ld)\n",skb->len,0);
768 if (vcc->qos.aal == ATM_AAL0)
769 *(unsigned long *) skb->data =
770 ntohl(*(unsigned long *) skb->data);
771 memset(skb->cb,0,sizeof(struct eni_skb_prv));
772 vcc->push(vcc,skb);
773 pushed++;
774 }
775 atomic_inc(&vcc->stats->rx);
776 }
777 wake_up(&eni_dev->rx_wait);
778 }
779
780
781 static int open_rx_first(struct atm_vcc *vcc)
782 {
783 struct eni_dev *eni_dev;
784 struct eni_vcc *eni_vcc;
785 unsigned long size;
786
787 DPRINTK("open_rx_first\n");
788 eni_dev = ENI_DEV(vcc->dev);
789 eni_vcc = ENI_VCC(vcc);
790 eni_vcc->rx = NULL;
791 if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0;
792 size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100;
793 if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <=
794 MID_MAX_BUF_SIZE)
795 size = MID_MAX_BUF_SIZE;
796 eni_vcc->recv = eni_alloc_mem(eni_dev,&size);
797 DPRINTK("rx at 0x%lx\n",eni_vcc->recv);
798 eni_vcc->words = size >> 2;
799 if (!eni_vcc->recv) return -ENOBUFS;
800 eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0;
801 eni_vcc->descr = 0;
802 eni_vcc->rx_pos = 0;
803 eni_vcc->rxing = 0;
804 eni_vcc->servicing = 0;
805 eni_vcc->next = ENI_VCC_NOS;
806 return 0;
807 }
808
809
810 static int open_rx_second(struct atm_vcc *vcc)
811 {
812 unsigned long here;
813 struct eni_dev *eni_dev;
814 struct eni_vcc *eni_vcc;
815 unsigned long size;
816 int order;
817
818 DPRINTK("open_rx_second\n");
819 eni_dev = ENI_DEV(vcc->dev);
820 eni_vcc = ENI_VCC(vcc);
821 if (!eni_vcc->rx) return 0;
822 /* set up VCI descriptor */
823 here = eni_dev->vci+vcc->vci*16;
824 DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4);
825 size = eni_vcc->words >> 8;
826 for (order = -1; size; order++) size >>= 1;
827 writel(0,here+4); /* descr, read = 0 */
828 writel(0,here+8); /* write, state, count = 0 */
829 if (eni_dev->rx_map[vcc->vci])
830 printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already "
831 "in use\n",vcc->dev->number,vcc->vci);
832 eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */
833 writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) <<
834 MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE |
835 (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) <<
836 MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here);
837 return 0;
838 }
839
840
841 static void close_rx(struct atm_vcc *vcc)
842 {
843 DECLARE_WAITQUEUE(wait,current);
844 unsigned long here;
845 struct eni_dev *eni_dev;
846 struct eni_vcc *eni_vcc;
847
848 eni_vcc = ENI_VCC(vcc);
849 if (!eni_vcc->rx) return;
850 eni_dev = ENI_DEV(vcc->dev);
851 if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) {
852 here = eni_dev->vci+vcc->vci*16;
853 /* block receiver */
854 writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH <<
855 MID_VCI_MODE_SHIFT),here);
856 /* wait for receiver to become idle */
857 udelay(27);
858 /* discard pending cell */
859 writel(readl(here) & ~MID_VCI_IN_SERVICE,here);
860 /* don't accept any new ones */
861 eni_dev->rx_map[vcc->vci] = NULL;
862 /* wait for RX queue to drain */
863 DPRINTK("eni_close: waiting for RX ...\n");
864 EVENT("RX closing\n",0,0);
865 add_wait_queue(&eni_dev->rx_wait,&wait);
866 set_current_state(TASK_UNINTERRUPTIBLE);
867 barrier();
868 for (;;) {
869 /* transition service->rx: rxing++, servicing-- */
870 if (!eni_vcc->servicing) {
871 barrier();
872 if (!eni_vcc->rxing) break;
873 }
874 EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing,
875 eni_vcc->servicing);
876 printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing,
877 eni_vcc->rxing);
878 schedule();
879 set_current_state(TASK_UNINTERRUPTIBLE);
880 }
881 for (;;) {
882 int at_end;
883 u32 tmp;
884
885 tasklet_disable(&eni_dev->task);
886 tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ;
887 at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT;
888 tasklet_enable(&eni_dev->task);
889 if (at_end) break;
890 EVENT("drain discard (host 0x%lx, nic 0x%lx)\n",
891 eni_vcc->rx_pos,tmp);
892 printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n",
893 eni_vcc->rx_pos,tmp);
894 schedule();
895 set_current_state(TASK_UNINTERRUPTIBLE);
896 }
897 set_current_state(TASK_RUNNING);
898 remove_wait_queue(&eni_dev->rx_wait,&wait);
899 }
900 eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2);
901 eni_vcc->rx = NULL;
902 }
903
904
905 static int start_rx(struct atm_dev *dev)
906 {
907 struct eni_dev *eni_dev;
908
909 eni_dev = ENI_DEV(dev);
910 eni_dev->rx_map = (struct atm_vcc **) get_free_page(GFP_KERNEL);
911 if (!eni_dev->rx_map) {
912 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
913 dev->number);
914 free_page((unsigned long) eni_dev->free_list);
915 return -ENOMEM;
916 }
917 memset(eni_dev->rx_map,0,PAGE_SIZE);
918 eni_dev->rx_mult = DEFAULT_RX_MULT;
919 eni_dev->fast = eni_dev->last_fast = NULL;
920 eni_dev->slow = eni_dev->last_slow = NULL;
921 init_waitqueue_head(&eni_dev->rx_wait);
922 skb_queue_head_init(&eni_dev->rx_queue);
923 eni_dev->serv_read = eni_in(MID_SERV_WRITE);
924 eni_out(0,MID_DMA_WR_RX);
925 return 0;
926 }
927
928
929 /*----------------------------------- TX ------------------------------------*/
930
931
932 enum enq_res { enq_ok,enq_next,enq_jam };
933
934
935 static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr,
936 u32 size)
937 {
938 u32 init,words;
939
940 DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size);
941 EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size);
942 #if 0 /* don't complain anymore */
943 if (paddr & 3)
944 printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr);
945 if (size & 3)
946 printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size);
947 #endif
948 if (paddr & 3) {
949 init = 4-(paddr & 3);
950 if (init > size || size < 7) init = size;
951 DPRINTK("put_dma: %lx DMA: %d/%d bytes\n",
952 (unsigned long) paddr,init,size);
953 dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) |
954 (chan << MID_DMA_CHAN_SHIFT);
955 dma[(*j)++] = paddr;
956 paddr += init;
957 size -= init;
958 }
959 words = size >> 2;
960 size &= 3;
961 if (words && (paddr & 31)) {
962 init = 8-((paddr & 31) >> 2);
963 if (init > words) init = words;
964 DPRINTK("put_dma: %lx DMA: %d/%d words\n",
965 (unsigned long) paddr,init,words);
966 dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
967 (chan << MID_DMA_CHAN_SHIFT);
968 dma[(*j)++] = paddr;
969 paddr += init << 2;
970 words -= init;
971 }
972 #ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */
973 if (words & ~15) {
974 DPRINTK("put_dma: %lx DMA: %d*16/%d words\n",
975 (unsigned long) paddr,words >> 4,words);
976 dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT)
977 | (chan << MID_DMA_CHAN_SHIFT);
978 dma[(*j)++] = paddr;
979 paddr += (words & ~15) << 2;
980 words &= 15;
981 }
982 #endif
983 #ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */
984 if (words & ~7) {
985 DPRINTK("put_dma: %lx DMA: %d*8/%d words\n",
986 (unsigned long) paddr,words >> 3,words);
987 dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT)
988 | (chan << MID_DMA_CHAN_SHIFT);
989 dma[(*j)++] = paddr;
990 paddr += (words & ~7) << 2;
991 words &= 7;
992 }
993 #endif
994 #ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */
995 if (words & ~3) {
996 DPRINTK("put_dma: %lx DMA: %d*4/%d words\n",
997 (unsigned long) paddr,words >> 2,words);
998 dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT)
999 | (chan << MID_DMA_CHAN_SHIFT);
1000 dma[(*j)++] = paddr;
1001 paddr += (words & ~3) << 2;
1002 words &= 3;
1003 }
1004 #endif
1005 #ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */
1006 if (words & ~1) {
1007 DPRINTK("put_dma: %lx DMA: %d*2/%d words\n",
1008 (unsigned long) paddr,words >> 1,words);
1009 dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT)
1010 | (chan << MID_DMA_CHAN_SHIFT);
1011 dma[(*j)++] = paddr;
1012 paddr += (words & ~1) << 2;
1013 words &= 1;
1014 }
1015 #endif
1016 if (words) {
1017 DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr,
1018 words);
1019 dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) |
1020 (chan << MID_DMA_CHAN_SHIFT);
1021 dma[(*j)++] = paddr;
1022 paddr += words << 2;
1023 }
1024 if (size) {
1025 DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr,
1026 size);
1027 dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) |
1028 (chan << MID_DMA_CHAN_SHIFT);
1029 dma[(*j)++] = paddr;
1030 }
1031 }
1032
1033
1034 static enum enq_res do_tx(struct sk_buff *skb)
1035 {
1036 struct atm_vcc *vcc;
1037 struct eni_dev *eni_dev;
1038 struct eni_vcc *eni_vcc;
1039 struct eni_tx *tx;
1040 dma_addr_t paddr;
1041 u32 dma_rd,dma_wr;
1042 u32 size; /* in words */
1043 int aal5,dma_size,i,j;
1044
1045 DPRINTK(">do_tx\n");
1046 NULLCHECK(skb);
1047 EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len);
1048 vcc = ATM_SKB(skb)->vcc;
1049 NULLCHECK(vcc);
1050 eni_dev = ENI_DEV(vcc->dev);
1051 NULLCHECK(eni_dev);
1052 eni_vcc = ENI_VCC(vcc);
1053 tx = eni_vcc->tx;
1054 NULLCHECK(tx);
1055 #if 0 /* Enable this for testing with the "align" program */
1056 {
1057 unsigned int hack = *((char *) skb->data)-'0';
1058
1059 if (hack < 8) {
1060 skb->data += hack;
1061 skb->len -= hack;
1062 }
1063 }
1064 #endif
1065 #if 0 /* should work now */
1066 if ((unsigned long) skb->data & 3)
1067 printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned "
1068 "TX data\n",vcc->dev->number,vcc->vci);
1069 #endif
1070 /*
1071 * Potential future IP speedup: make hard_header big enough to put
1072 * segmentation descriptor directly into PDU. Saves: 4 slave writes,
1073 * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-)
1074 */
1075
1076 aal5 = vcc->qos.aal == ATM_AAL5;
1077 /* check space in buffer */
1078 if (!aal5)
1079 size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE;
1080 /* cell without HEC plus segmentation header (includes
1081 four-byte cell header) */
1082 else {
1083 size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1;
1084 /* add AAL5 trailer */
1085 size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE;
1086 /* add segmentation header */
1087 }
1088 /*
1089 * Can I move tx_pos by size bytes without getting closer than TX_GAP
1090 * to the read pointer ? TX_GAP means to leave some space for what
1091 * the manual calls "too close".
1092 */
1093 if (!NEPMOK(tx->tx_pos,size+TX_GAP,
1094 eni_in(MID_TX_RDPTR(tx->index)),tx->words)) {
1095 DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n",
1096 vcc->dev->number,size);
1097 return enq_next;
1098 }
1099 /* check DMA */
1100 dma_wr = eni_in(MID_DMA_WR_TX);
1101 dma_rd = eni_in(MID_DMA_RD_TX);
1102 dma_size = 3; /* JK for descriptor and final fill, plus final size
1103 mis-alignment fix */
1104 DPRINTK("iovcnt = %d\n",ATM_SKB(skb)->iovcnt);
1105 if (!ATM_SKB(skb)->iovcnt) dma_size += 5;
1106 else dma_size += 5*ATM_SKB(skb)->iovcnt;
1107 if (dma_size > TX_DMA_BUF) {
1108 printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries "
1109 "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF);
1110 }
1111 DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos);
1112 if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) <
1113 dma_size) {
1114 printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n",
1115 vcc->dev->number);
1116 return enq_jam;
1117 }
1118 paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len,
1119 PCI_DMA_TODEVICE);
1120 ENI_PRV_PADDR(skb) = paddr;
1121 /* prepare DMA queue entries */
1122 j = 0;
1123 eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) <<
1124 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1125 MID_DT_JK;
1126 j++;
1127 if (!ATM_SKB(skb)->iovcnt)
1128 if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len);
1129 else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4);
1130 else {
1131 DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */
1132 for (i = 0; i < ATM_SKB(skb)->iovcnt; i++)
1133 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1134 ((struct iovec *) skb->data)[i].iov_base,
1135 ((struct iovec *) skb->data)[i].iov_len);
1136 }
1137 if (skb->len & 3)
1138 put_dma(tx->index,eni_dev->dma,&j,zeroes,4-(skb->len & 3));
1139 /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */
1140 eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) <<
1141 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1142 MID_DMA_END | MID_DT_JK;
1143 j++;
1144 DPRINTK("DMA at end: %d\n",j);
1145 /* store frame */
1146 writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) |
1147 (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) |
1148 (tx->resolution << MID_SEG_RATE_SHIFT) |
1149 (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4);
1150 /*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/
1151 writel((vcc->vci << MID_SEG_VCI_SHIFT) |
1152 (aal5 ? 0 : (skb->data[3] & 0xf)) |
1153 (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0),
1154 tx->send+((tx->tx_pos+1) & (tx->words-1))*4);
1155 DPRINTK("size: %d, len:%d\n",size,skb->len);
1156 if (aal5)
1157 writel(skb->len,tx->send+
1158 ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4);
1159 j = j >> 1;
1160 for (i = 0; i < j; i++) {
1161 writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8);
1162 writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4);
1163 dma_wr = (dma_wr+1) & (NR_DMA_TX-1);
1164 }
1165 ENI_PRV_POS(skb) = tx->tx_pos;
1166 ENI_PRV_SIZE(skb) = size;
1167 ENI_VCC(vcc)->txing += size;
1168 tx->tx_pos = (tx->tx_pos+size) & (tx->words-1);
1169 DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos);
1170 eni_out(dma_wr,MID_DMA_WR_TX);
1171 skb_queue_tail(&eni_dev->tx_queue,skb);
1172 queued++;
1173 return enq_ok;
1174 }
1175
1176
1177 static void poll_tx(struct atm_dev *dev)
1178 {
1179 struct eni_tx *tx;
1180 struct sk_buff *skb;
1181 enum enq_res res;
1182 int i;
1183
1184 DPRINTK(">poll_tx\n");
1185 for (i = NR_CHAN-1; i >= 0; i--) {
1186 tx = &ENI_DEV(dev)->tx[i];
1187 if (tx->send)
1188 while ((skb = skb_dequeue(&tx->backlog))) {
1189 res = do_tx(skb);
1190 if (res == enq_ok) continue;
1191 DPRINTK("re-queuing TX PDU\n");
1192 skb_queue_head(&tx->backlog,skb);
1193 requeued++;
1194 if (res == enq_jam) return;
1195 break;
1196 }
1197 }
1198 }
1199
1200
1201 static void dequeue_tx(struct atm_dev *dev)
1202 {
1203 struct eni_dev *eni_dev;
1204 struct atm_vcc *vcc;
1205 struct sk_buff *skb;
1206 struct eni_tx *tx;
1207
1208 NULLCHECK(dev);
1209 eni_dev = ENI_DEV(dev);
1210 NULLCHECK(eni_dev);
1211 while ((skb = skb_dequeue(&eni_dev->tx_queue))) {
1212 vcc = ATM_SKB(skb)->vcc;
1213 NULLCHECK(vcc);
1214 tx = ENI_VCC(vcc)->tx;
1215 NULLCHECK(ENI_VCC(vcc)->tx);
1216 DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb),
1217 (unsigned) eni_in(MID_TX_DESCRSTART(tx->index)));
1218 if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) ==
1219 eni_in(MID_TX_DESCRSTART(tx->index))) {
1220 skb_queue_head(&eni_dev->tx_queue,skb);
1221 break;
1222 }
1223 ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb);
1224 pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len,
1225 PCI_DMA_TODEVICE);
1226 if (vcc->pop) vcc->pop(vcc,skb);
1227 else dev_kfree_skb_irq(skb);
1228 atomic_inc(&vcc->stats->tx);
1229 wake_up(&eni_dev->tx_wait);
1230 dma_complete++;
1231 }
1232 }
1233
1234
1235 static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr)
1236 {
1237 int i;
1238
1239 for (i = !ubr; i < NR_CHAN; i++)
1240 if (!eni_dev->tx[i].send) return eni_dev->tx+i;
1241 return NULL;
1242 }
1243
1244
1245 static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre,
1246 int *res,int unlimited)
1247 {
1248 static const int pre_div[] = { 4,16,128,2048 };
1249 /* 2^(((x+2)^2-(x+2))/2+1) */
1250
1251 if (unlimited) *pre = *res = 0;
1252 else {
1253 if (*pcr > 0) {
1254 int div;
1255
1256 for (*pre = 0; *pre < 3; (*pre)++)
1257 if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break;
1258 div = pre_div[*pre]**pcr;
1259 DPRINTK("min div %d\n",div);
1260 *res = TS_CLOCK/div-1;
1261 }
1262 else {
1263 int div;
1264
1265 if (!*pcr) *pcr = eni_dev->tx_bw+reserved;
1266 for (*pre = 3; *pre >= 0; (*pre)--)
1267 if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break;
1268 if (*pre < 3) (*pre)++; /* else fail later */
1269 div = pre_div[*pre]*-*pcr;
1270 DPRINTK("max div %d\n",div);
1271 *res = (TS_CLOCK+div-1)/div-1;
1272 }
1273 if (*res < 0) *res = 0;
1274 if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE;
1275 }
1276 *pcr = TS_CLOCK/pre_div[*pre]/(*res+1);
1277 DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res);
1278 return 0;
1279 }
1280
1281
1282 static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp,
1283 int set_rsv,int set_shp)
1284 {
1285 struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1286 struct eni_vcc *eni_vcc = ENI_VCC(vcc);
1287 struct eni_tx *tx;
1288 unsigned long size,mem;
1289 int rate,ubr,unlimited,new_tx;
1290 int pre,res,order;
1291 int error;
1292
1293 rate = atm_pcr_goal(txtp);
1294 ubr = txtp->traffic_class == ATM_UBR;
1295 unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR ||
1296 rate >= ATM_OC3_PCR);
1297 if (!unlimited) {
1298 size = txtp->max_sdu*eni_dev->tx_mult/100;
1299 if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <=
1300 MID_MAX_BUF_SIZE)
1301 size = MID_MAX_BUF_SIZE;
1302 }
1303 else {
1304 if (eni_dev->ubr) {
1305 eni_vcc->tx = eni_dev->ubr;
1306 txtp->pcr = ATM_OC3_PCR;
1307 return 0;
1308 }
1309 size = UBR_BUFFER;
1310 }
1311 new_tx = !eni_vcc->tx;
1312 mem = 0; /* for gcc */
1313 if (!new_tx) tx = eni_vcc->tx;
1314 else {
1315 mem = eni_alloc_mem(eni_dev,&size);
1316 if (!mem) return -ENOBUFS;
1317 tx = alloc_tx(eni_dev,unlimited);
1318 if (!tx) {
1319 eni_free_mem(eni_dev,mem,size);
1320 return -EBUSY;
1321 }
1322 DPRINTK("got chan %d\n",tx->index);
1323 tx->reserved = tx->shaping = 0;
1324 tx->send = mem;
1325 tx->words = size >> 2;
1326 skb_queue_head_init(&tx->backlog);
1327 for (order = 0; size > (1 << (order+10)); order++);
1328 eni_out((order << MID_SIZE_SHIFT) |
1329 ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)),
1330 MID_TX_PLACE(tx->index));
1331 tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) &
1332 MID_DESCR_START;
1333 }
1334 error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited);
1335 if (!error && txtp->min_pcr > rate) error = -EINVAL;
1336 if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR &&
1337 txtp->max_pcr < rate) error = -EINVAL;
1338 if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved)
1339 error = -EINVAL;
1340 if (!error && set_rsv && !set_shp && rate < tx->shaping)
1341 error = -EINVAL;
1342 if (!error && !set_rsv && rate > tx->reserved && !ubr)
1343 error = -EINVAL;
1344 if (error) {
1345 if (new_tx) {
1346 tx->send = 0;
1347 eni_free_mem(eni_dev,mem,size);
1348 }
1349 return error;
1350 }
1351 txtp->pcr = rate;
1352 if (set_rsv && !ubr) {
1353 eni_dev->tx_bw += tx->reserved;
1354 tx->reserved = rate;
1355 eni_dev->tx_bw -= rate;
1356 }
1357 if (set_shp || (unlimited && new_tx)) {
1358 if (unlimited && new_tx) eni_dev->ubr = tx;
1359 tx->prescaler = pre;
1360 tx->resolution = res;
1361 tx->shaping = rate;
1362 }
1363 if (set_shp) eni_vcc->tx = tx;
1364 DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping);
1365 return 0;
1366 }
1367
1368
1369 static int open_tx_first(struct atm_vcc *vcc)
1370 {
1371 ENI_VCC(vcc)->tx = NULL;
1372 if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0;
1373 ENI_VCC(vcc)->txing = 0;
1374 return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1);
1375 }
1376
1377
1378 static int open_tx_second(struct atm_vcc *vcc)
1379 {
1380 return 0; /* nothing to do */
1381 }
1382
1383
1384 static void close_tx(struct atm_vcc *vcc)
1385 {
1386 DECLARE_WAITQUEUE(wait,current);
1387 struct eni_dev *eni_dev;
1388 struct eni_vcc *eni_vcc;
1389
1390 eni_vcc = ENI_VCC(vcc);
1391 if (!eni_vcc->tx) return;
1392 eni_dev = ENI_DEV(vcc->dev);
1393 /* wait for TX queue to drain */
1394 DPRINTK("eni_close: waiting for TX ...\n");
1395 add_wait_queue(&eni_dev->tx_wait,&wait);
1396 set_current_state(TASK_UNINTERRUPTIBLE);
1397 for (;;) {
1398 int txing;
1399
1400 tasklet_disable(&eni_dev->task);
1401 txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing;
1402 tasklet_enable(&eni_dev->task);
1403 if (!txing) break;
1404 DPRINTK("%d TX left\n",eni_vcc->txing);
1405 schedule();
1406 set_current_state(TASK_UNINTERRUPTIBLE);
1407 }
1408 set_current_state(TASK_RUNNING);
1409 remove_wait_queue(&eni_dev->tx_wait,&wait);
1410 if (eni_vcc->tx != eni_dev->ubr) {
1411 /*
1412 * Looping a few times in here is probably far cheaper than
1413 * keeping track of TX completions all the time, so let's poll
1414 * a bit ...
1415 */
1416 while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) !=
1417 eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index)))
1418 schedule();
1419 eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2);
1420 eni_vcc->tx->send = 0;
1421 eni_dev->tx_bw += eni_vcc->tx->reserved;
1422 }
1423 eni_vcc->tx = NULL;
1424 }
1425
1426
1427 static int start_tx(struct atm_dev *dev)
1428 {
1429 struct eni_dev *eni_dev;
1430 int i;
1431
1432 eni_dev = ENI_DEV(dev);
1433 eni_dev->lost = 0;
1434 eni_dev->tx_bw = ATM_OC3_PCR;
1435 eni_dev->tx_mult = DEFAULT_TX_MULT;
1436 init_waitqueue_head(&eni_dev->tx_wait);
1437 eni_dev->ubr = NULL;
1438 skb_queue_head_init(&eni_dev->tx_queue);
1439 eni_out(0,MID_DMA_WR_TX);
1440 for (i = 0; i < NR_CHAN; i++) {
1441 eni_dev->tx[i].send = 0;
1442 eni_dev->tx[i].index = i;
1443 }
1444 return 0;
1445 }
1446
1447
1448 /*--------------------------------- common ----------------------------------*/
1449
1450
1451 #if 0 /* may become useful again when tuning things */
1452
1453 static void foo(void)
1454 {
1455 printk(KERN_INFO
1456 "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n"
1457 "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n",
1458 tx_complete,dma_complete,queued,requeued,submitted,backlogged,
1459 rx_enqueued,rx_dequeued,putting,pushed);
1460 if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost);
1461 }
1462
1463 #endif
1464
1465
1466 static void bug_int(struct atm_dev *dev,unsigned long reason)
1467 {
1468 struct eni_dev *eni_dev;
1469
1470 DPRINTK(">bug_int\n");
1471 eni_dev = ENI_DEV(dev);
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 void eni_int(int irq,void *dev_id,struct pt_regs *regs)
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 }
1520
1521
1522 static void eni_tasklet(unsigned long data)
1523 {
1524 struct atm_dev *dev = (struct atm_dev *) data;
1525 struct eni_dev *eni_dev = ENI_DEV(dev);
1526 unsigned long flags;
1527 u32 events;
1528
1529 DPRINTK("eni_tasklet (dev %p)\n",dev);
1530 spin_lock_irqsave(&eni_dev->lock,flags);
1531 events = xchg(&eni_dev->events,0);
1532 spin_unlock_irqrestore(&eni_dev->lock,flags);
1533 if (events & MID_RX_DMA_COMPLETE) {
1534 EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0);
1535 dequeue_rx(dev);
1536 EVENT("dequeue_rx done, starting poll_rx\n",0,0);
1537 poll_rx(dev);
1538 EVENT("poll_rx done\n",0,0);
1539 /* poll_tx ? */
1540 }
1541 if (events & MID_SERVICE) {
1542 EVENT("INT: service, starting get_service\n",0,0);
1543 get_service(dev);
1544 EVENT("get_service done, starting poll_rx\n",0,0);
1545 poll_rx(dev);
1546 EVENT("poll_rx done\n",0,0);
1547 }
1548 if (events & MID_TX_DMA_COMPLETE) {
1549 EVENT("INT: TX DMA COMPLETE\n",0,0);
1550 dequeue_tx(dev);
1551 }
1552 if (events & MID_TX_COMPLETE) {
1553 EVENT("INT: TX COMPLETE\n",0,0);
1554 tx_complete++;
1555 wake_up(&eni_dev->tx_wait);
1556 /* poll_rx ? */
1557 }
1558 if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) {
1559 EVENT("bug interrupt\n",0,0);
1560 bug_int(dev,events);
1561 }
1562 poll_tx(dev);
1563 }
1564
1565
1566 /*--------------------------------- entries ---------------------------------*/
1567
1568
1569 static const char *media_name[] __devinitdata = {
1570 "MMF", "SMF", "MMF", "03?", /* 0- 3 */
1571 "UTP", "05?", "06?", "07?", /* 4- 7 */
1572 "TAXI","09?", "10?", "11?", /* 8-11 */
1573 "12?", "13?", "14?", "15?", /* 12-15 */
1574 "MMF", "SMF", "18?", "19?", /* 16-19 */
1575 "UTP", "21?", "22?", "23?", /* 20-23 */
1576 "24?", "25?", "26?", "27?", /* 24-27 */
1577 "28?", "29?", "30?", "31?" /* 28-31 */
1578 };
1579
1580
1581 #define SET_SEPROM \
1582 ({ if (!error && !pci_error) { \
1583 pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \
1584 udelay(10); /* 10 usecs */ \
1585 } })
1586 #define GET_SEPROM \
1587 ({ if (!error && !pci_error) { \
1588 pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \
1589 udelay(10); /* 10 usecs */ \
1590 } })
1591
1592
1593 static int __devinit get_esi_asic(struct atm_dev *dev)
1594 {
1595 struct eni_dev *eni_dev;
1596 unsigned char tonga;
1597 int error,failed,pci_error;
1598 int address,i,j;
1599
1600 eni_dev = ENI_DEV(dev);
1601 error = pci_error = 0;
1602 tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK;
1603 SET_SEPROM;
1604 for (i = 0; i < ESI_LEN && !error && !pci_error; i++) {
1605 /* start operation */
1606 tonga |= SEPROM_DATA;
1607 SET_SEPROM;
1608 tonga |= SEPROM_CLK;
1609 SET_SEPROM;
1610 tonga &= ~SEPROM_DATA;
1611 SET_SEPROM;
1612 tonga &= ~SEPROM_CLK;
1613 SET_SEPROM;
1614 /* send address */
1615 address = ((i+SEPROM_ESI_BASE) << 1)+1;
1616 for (j = 7; j >= 0; j--) {
1617 tonga = (address >> j) & 1 ? tonga | SEPROM_DATA :
1618 tonga & ~SEPROM_DATA;
1619 SET_SEPROM;
1620 tonga |= SEPROM_CLK;
1621 SET_SEPROM;
1622 tonga &= ~SEPROM_CLK;
1623 SET_SEPROM;
1624 }
1625 /* get ack */
1626 tonga |= SEPROM_DATA;
1627 SET_SEPROM;
1628 tonga |= SEPROM_CLK;
1629 SET_SEPROM;
1630 GET_SEPROM;
1631 failed = tonga & SEPROM_DATA;
1632 tonga &= ~SEPROM_CLK;
1633 SET_SEPROM;
1634 tonga |= SEPROM_DATA;
1635 SET_SEPROM;
1636 if (failed) error = -EIO;
1637 else {
1638 dev->esi[i] = 0;
1639 for (j = 7; j >= 0; j--) {
1640 dev->esi[i] <<= 1;
1641 tonga |= SEPROM_DATA;
1642 SET_SEPROM;
1643 tonga |= SEPROM_CLK;
1644 SET_SEPROM;
1645 GET_SEPROM;
1646 if (tonga & SEPROM_DATA) dev->esi[i] |= 1;
1647 tonga &= ~SEPROM_CLK;
1648 SET_SEPROM;
1649 tonga |= SEPROM_DATA;
1650 SET_SEPROM;
1651 }
1652 /* get ack */
1653 tonga |= SEPROM_DATA;
1654 SET_SEPROM;
1655 tonga |= SEPROM_CLK;
1656 SET_SEPROM;
1657 GET_SEPROM;
1658 if (!(tonga & SEPROM_DATA)) error = -EIO;
1659 tonga &= ~SEPROM_CLK;
1660 SET_SEPROM;
1661 tonga |= SEPROM_DATA;
1662 SET_SEPROM;
1663 }
1664 /* stop operation */
1665 tonga &= ~SEPROM_DATA;
1666 SET_SEPROM;
1667 tonga |= SEPROM_CLK;
1668 SET_SEPROM;
1669 tonga |= SEPROM_DATA;
1670 SET_SEPROM;
1671 }
1672 if (pci_error) {
1673 printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI "
1674 "(0x%02x)\n",dev->number,pci_error);
1675 error = -EIO;
1676 }
1677 return error;
1678 }
1679
1680
1681 #undef SET_SEPROM
1682 #undef GET_SEPROM
1683
1684
1685 static int __devinit get_esi_fpga(struct atm_dev *dev,unsigned long base)
1686 {
1687 unsigned long mac_base;
1688 int i;
1689
1690 mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom);
1691 for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3));
1692 return 0;
1693 }
1694
1695
1696 static int __devinit eni_do_init(struct atm_dev *dev)
1697 {
1698 struct midway_eprom *eprom;
1699 struct eni_dev *eni_dev;
1700 struct pci_dev *pci_dev;
1701 unsigned long real_base,base;
1702 unsigned char revision;
1703 int error,i,last;
1704
1705 DPRINTK(">eni_init\n");
1706 dev->ci_range.vpi_bits = 0;
1707 dev->ci_range.vci_bits = NR_VCI_LD;
1708 dev->link_rate = ATM_OC3_PCR;
1709 eni_dev = ENI_DEV(dev);
1710 pci_dev = eni_dev->pci_dev;
1711 real_base = pci_resource_start(pci_dev, 0);
1712 eni_dev->irq = pci_dev->irq;
1713 error = pci_read_config_byte(pci_dev,PCI_REVISION_ID,&revision);
1714 if (error) {
1715 printk(KERN_ERR DEV_LABEL "(itf %d): init error 0x%02x\n",
1716 dev->number,error);
1717 return -EINVAL;
1718 }
1719 if ((error = pci_write_config_word(pci_dev,PCI_COMMAND,
1720 PCI_COMMAND_MEMORY |
1721 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1722 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory "
1723 "(0x%02x)\n",dev->number,error);
1724 return -EIO;
1725 }
1726 printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,",
1727 dev->number,revision,real_base,eni_dev->irq);
1728 if (!(base = (unsigned long) ioremap_nocache(real_base,MAP_MAX_SIZE))) {
1729 printk("\n");
1730 printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page "
1731 "mapping\n",dev->number);
1732 return error;
1733 }
1734 eni_dev->base_diff = real_base-base;
1735 /* id may not be present in ASIC Tonga boards - check this @@@ */
1736 if (!eni_dev->asic) {
1737 eprom = (struct midway_eprom *) (base+EPROM_SIZE-sizeof(struct
1738 midway_eprom));
1739 if (readl(&eprom->magic) != ENI155_MAGIC) {
1740 printk("\n");
1741 printk(KERN_ERR KERN_ERR DEV_LABEL "(itf %d): bad "
1742 "magic - expected 0x%x, got 0x%x\n",dev->number,
1743 ENI155_MAGIC,(unsigned) readl(&eprom->magic));
1744 return -EINVAL;
1745 }
1746 }
1747 eni_dev->phy = base+PHY_BASE;
1748 eni_dev->reg = base+REG_BASE;
1749 eni_dev->ram = base+RAM_BASE;
1750 last = MAP_MAX_SIZE-RAM_BASE;
1751 for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) {
1752 writel(0x55555555,eni_dev->ram+i);
1753 if (readl(eni_dev->ram+i) != 0x55555555) last = i;
1754 else {
1755 writel(0xAAAAAAAA,eni_dev->ram+i);
1756 if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i;
1757 else writel(i,eni_dev->ram+i);
1758 }
1759 }
1760 for (i = 0; i < last; i += RAM_INCREMENT)
1761 if (readl(eni_dev->ram+i) != i) break;
1762 eni_dev->mem = i;
1763 memset_io(eni_dev->ram,0,eni_dev->mem);
1764 /* TODO: should shrink allocation now */
1765 printk("mem=%dkB (",eni_dev->mem >> 10);
1766 /* TODO: check for non-SUNI, check for TAXI ? */
1767 if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) {
1768 printk(")\n");
1769 printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n",
1770 dev->number,(unsigned) eni_in(MID_RES_ID_MCON));
1771 return -EINVAL;
1772 }
1773 error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base);
1774 if (error) return error;
1775 for (i = 0; i < ESI_LEN; i++)
1776 printk("%s%02X",i ? "-" : "",dev->esi[i]);
1777 printk(")\n");
1778 printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number,
1779 eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA",
1780 media_name[eni_in(MID_RES_ID_MCON) & DAUGTHER_ID]);
1781 return suni_init(dev);
1782 }
1783
1784
1785 static int __devinit eni_start(struct atm_dev *dev)
1786 {
1787 struct eni_dev *eni_dev;
1788 unsigned long buf,buffer_mem;
1789 int error;
1790
1791 DPRINTK(">eni_start\n");
1792 eni_dev = ENI_DEV(dev);
1793 if (request_irq(eni_dev->irq,&eni_int,SA_SHIRQ,DEV_LABEL,dev)) {
1794 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
1795 dev->number,eni_dev->irq);
1796 return -EAGAIN;
1797 }
1798 /* @@@ should release IRQ on error */
1799 pci_set_master(eni_dev->pci_dev);
1800 if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND,
1801 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
1802 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1803 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+"
1804 "master (0x%02x)\n",dev->number,error);
1805 return error;
1806 }
1807 #ifdef __sparc_v9__ /* copied from drivers/net/sunhme.c */
1808 /* NOTE: Cache line size is in 32-bit word units. */
1809 pci_write_config_byte(eni_dev->pci_dev, PCI_CACHE_LINE_SIZE, 0x10);
1810 #endif
1811 if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,
1812 END_SWAP_DMA))) {
1813 printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap "
1814 "(0x%02x)\n",dev->number,error);
1815 return error;
1816 }
1817 /* determine addresses of internal tables */
1818 eni_dev->vci = eni_dev->ram;
1819 eni_dev->rx_dma = eni_dev->ram+NR_VCI*16;
1820 eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8;
1821 eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8;
1822 buf = eni_dev->service+NR_SERVICE*4;
1823 DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n",
1824 eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma,
1825 eni_dev->service,buf);
1826 spin_lock_init(&eni_dev->lock);
1827 tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev);
1828 eni_dev->events = 0;
1829 /* initialize memory management */
1830 buffer_mem = eni_dev->mem-(buf-eni_dev->ram);
1831 eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2;
1832 eni_dev->free_list = (struct eni_free *) kmalloc(
1833 sizeof(struct eni_free)*(eni_dev->free_list_size+1),GFP_KERNEL);
1834 if (!eni_dev->free_list) {
1835 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
1836 dev->number);
1837 return -ENOMEM;
1838 }
1839 eni_dev->free_len = 0;
1840 eni_put_free(eni_dev,buf,buffer_mem);
1841 memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */
1842 /*
1843 * byte_addr free (k)
1844 * 0x00000000 512 VCI table
1845 * 0x00004000 496 RX DMA
1846 * 0x00005000 492 TX DMA
1847 * 0x00006000 488 service list
1848 * 0x00007000 484 buffers
1849 * 0x00080000 0 end (512kB)
1850 */
1851 eni_out(0xffffffff,MID_IE);
1852 error = start_tx(dev);
1853 if (error) return error;
1854 error = start_rx(dev);
1855 if (error) return error;
1856 error = dev->phy->start(dev);
1857 if (error) return error;
1858 eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) |
1859 MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE,
1860 MID_MC_S);
1861 /* Tonga uses SBus INTReq1 */
1862 (void) eni_in(MID_ISA); /* clear Midway interrupts */
1863 return 0;
1864 }
1865
1866
1867 static void eni_close(struct atm_vcc *vcc)
1868 {
1869 DPRINTK(">eni_close\n");
1870 if (!ENI_VCC(vcc)) return;
1871 clear_bit(ATM_VF_READY,&vcc->flags);
1872 close_rx(vcc);
1873 close_tx(vcc);
1874 DPRINTK("eni_close: done waiting\n");
1875 /* deallocate memory */
1876 kfree(ENI_VCC(vcc));
1877 ENI_VCC(vcc) = NULL;
1878 clear_bit(ATM_VF_ADDR,&vcc->flags);
1879 /*foo();*/
1880 }
1881
1882
1883 static int get_ci(struct atm_vcc *vcc,short *vpi,int *vci)
1884 {
1885 struct atm_vcc *walk;
1886
1887 if (*vpi == ATM_VPI_ANY) *vpi = 0;
1888 if (*vci == ATM_VCI_ANY) {
1889 for (*vci = ATM_NOT_RSV_VCI; *vci < NR_VCI; (*vci)++) {
1890 if (vcc->qos.rxtp.traffic_class != ATM_NONE &&
1891 ENI_DEV(vcc->dev)->rx_map[*vci])
1892 continue;
1893 if (vcc->qos.txtp.traffic_class != ATM_NONE) {
1894 for (walk = vcc->dev->vccs; walk;
1895 walk = walk->next)
1896 if (test_bit(ATM_VF_ADDR,&walk->flags)
1897 && walk->vci == *vci &&
1898 walk->qos.txtp.traffic_class !=
1899 ATM_NONE)
1900 break;
1901 if (walk) continue;
1902 }
1903 break;
1904 }
1905 return *vci == NR_VCI ? -EADDRINUSE : 0;
1906 }
1907 if (*vci == ATM_VCI_UNSPEC) return 0;
1908 if (vcc->qos.rxtp.traffic_class != ATM_NONE &&
1909 ENI_DEV(vcc->dev)->rx_map[*vci])
1910 return -EADDRINUSE;
1911 if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0;
1912 for (walk = vcc->dev->vccs; walk; walk = walk->next)
1913 if (test_bit(ATM_VF_ADDR,&walk->flags) && walk->vci == *vci &&
1914 walk->qos.txtp.traffic_class != ATM_NONE)
1915 return -EADDRINUSE;
1916 return 0;
1917 }
1918
1919
1920 static int eni_open(struct atm_vcc *vcc,short vpi,int vci)
1921 {
1922 struct eni_dev *eni_dev;
1923 struct eni_vcc *eni_vcc;
1924 int error;
1925
1926 DPRINTK(">eni_open\n");
1927 EVENT("eni_open\n",0,0);
1928 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) ENI_VCC(vcc) = NULL;
1929 eni_dev = ENI_DEV(vcc->dev);
1930 error = get_ci(vcc,&vpi,&vci);
1931 if (error) return error;
1932 vcc->vpi = vpi;
1933 vcc->vci = vci;
1934 if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
1935 set_bit(ATM_VF_ADDR,&vcc->flags);
1936 if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5)
1937 return -EINVAL;
1938 DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi,
1939 vcc->vci);
1940 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
1941 eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL);
1942 if (!eni_vcc) return -ENOMEM;
1943 ENI_VCC(vcc) = eni_vcc;
1944 eni_vcc->tx = NULL; /* for eni_close after open_rx */
1945 if ((error = open_rx_first(vcc))) {
1946 eni_close(vcc);
1947 return error;
1948 }
1949 if ((error = open_tx_first(vcc))) {
1950 eni_close(vcc);
1951 return error;
1952 }
1953 }
1954 if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0;
1955 if ((error = open_rx_second(vcc))) {
1956 eni_close(vcc);
1957 return error;
1958 }
1959 if ((error = open_tx_second(vcc))) {
1960 eni_close(vcc);
1961 return error;
1962 }
1963 set_bit(ATM_VF_READY,&vcc->flags);
1964 /* should power down SUNI while !ref_count @@@ */
1965 return 0;
1966 }
1967
1968
1969 static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs)
1970 {
1971 struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1972 struct eni_tx *tx = ENI_VCC(vcc)->tx;
1973 struct sk_buff *skb;
1974 int error,rate,rsv,shp;
1975
1976 if (qos->txtp.traffic_class == ATM_NONE) return 0;
1977 if (tx == eni_dev->ubr) return -EBADFD;
1978 rate = atm_pcr_goal(&qos->txtp);
1979 if (rate < 0) rate = -rate;
1980 rsv = shp = 0;
1981 if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1;
1982 if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1;
1983 if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1;
1984 if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1;
1985 if (!rsv && !shp) return 0;
1986 error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp);
1987 if (error) return error;
1988 if (shp && !(flgs & ATM_MF_IMMED)) return 0;
1989 /*
1990 * Walk through the send buffer and patch the rate information in all
1991 * segmentation buffer descriptors of this VCC.
1992 */
1993 tasklet_disable(&eni_dev->task);
1994 for (skb = eni_dev->tx_queue.next; skb !=
1995 (struct sk_buff *) &eni_dev->tx_queue; skb = skb->next) {
1996 unsigned long dsc;
1997
1998 if (ATM_SKB(skb)->vcc != vcc) continue;
1999 dsc = tx->send+ENI_PRV_POS(skb)*4;
2000 writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) |
2001 (tx->prescaler << MID_SEG_PR_SHIFT) |
2002 (tx->resolution << MID_SEG_RATE_SHIFT), dsc);
2003 }
2004 tasklet_enable(&eni_dev->task);
2005 return 0;
2006 }
2007
2008
2009 static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void *arg)
2010 {
2011 struct eni_dev *eni_dev = ENI_DEV(dev);
2012
2013 if (cmd == ENI_MEMDUMP) {
2014 if (!capable(CAP_NET_ADMIN)) return -EPERM;
2015 printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d "
2016 "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number);
2017 dump(dev);
2018 return 0;
2019 }
2020 if (cmd == ENI_SETMULT) {
2021 struct eni_multipliers mult;
2022
2023 if (!capable(CAP_NET_ADMIN)) return -EPERM;
2024 if (copy_from_user(&mult,(void *) arg,
2025 sizeof(struct eni_multipliers)))
2026 return -EFAULT;
2027 if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) ||
2028 mult.tx > 65536 || mult.rx > 65536)
2029 return -EINVAL;
2030 if (mult.tx) eni_dev->tx_mult = mult.tx;
2031 if (mult.rx) eni_dev->rx_mult = mult.rx;
2032 return 0;
2033 }
2034 if (cmd == ATM_SETCIRANGE) {
2035 struct atm_cirange ci;
2036
2037 if (copy_from_user(&ci,(void *) arg,sizeof(struct atm_cirange)))
2038 return -EFAULT;
2039 if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) &&
2040 (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX))
2041 return 0;
2042 return -EINVAL;
2043 }
2044 if (!dev->phy->ioctl) return -ENOIOCTLCMD;
2045 return dev->phy->ioctl(dev,cmd,arg);
2046 }
2047
2048
2049 static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname,
2050 void *optval,int optlen)
2051 {
2052 return -EINVAL;
2053 }
2054
2055
2056 static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname,
2057 void *optval,int optlen)
2058 {
2059 return -EINVAL;
2060 }
2061
2062
2063 static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb)
2064 {
2065 enum enq_res res;
2066
2067 DPRINTK(">eni_send\n");
2068 if (!ENI_VCC(vcc)->tx) {
2069 if (vcc->pop) vcc->pop(vcc,skb);
2070 else dev_kfree_skb(skb);
2071 return -EINVAL;
2072 }
2073 if (!skb) {
2074 printk(KERN_CRIT "!skb in eni_send ?\n");
2075 if (vcc->pop) vcc->pop(vcc,skb);
2076 return -EINVAL;
2077 }
2078 if (vcc->qos.aal == ATM_AAL0) {
2079 if (skb->len != ATM_CELL_SIZE-1) {
2080 if (vcc->pop) vcc->pop(vcc,skb);
2081 else dev_kfree_skb(skb);
2082 return -EINVAL;
2083 }
2084 *(u32 *) skb->data = htonl(*(u32 *) skb->data);
2085 }
2086 submitted++;
2087 ATM_SKB(skb)->vcc = vcc;
2088 tasklet_disable(&ENI_DEV(vcc->dev)->task);
2089 res = do_tx(skb);
2090 tasklet_enable(&ENI_DEV(vcc->dev)->task);
2091 if (res == enq_ok) return 0;
2092 skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb);
2093 backlogged++;
2094 tasklet_schedule(&ENI_DEV(vcc->dev)->task);
2095 return 0;
2096 }
2097
2098
2099 static int eni_sg_send(struct atm_vcc *vcc,unsigned long start,
2100 unsigned long size)
2101 {
2102 return vcc->qos.aal == ATM_AAL5 && !((start | size) & 3);
2103 /* don't tolerate misalignment */
2104 }
2105
2106
2107 static void eni_phy_put(struct atm_dev *dev,unsigned char value,
2108 unsigned long addr)
2109 {
2110 writel(value,ENI_DEV(dev)->phy+addr*4);
2111 }
2112
2113
2114
2115 static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr)
2116 {
2117 return readl(ENI_DEV(dev)->phy+addr*4);
2118 }
2119
2120
2121 static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page)
2122 {
2123 static const char *signal[] = { "LOST","unknown","okay" };
2124 struct eni_dev *eni_dev = ENI_DEV(dev);
2125 struct atm_vcc *vcc;
2126 int left,i;
2127
2128 left = *pos;
2129 if (!left)
2130 return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, "
2131 "%d cps remaining\n",dev->number,signal[(int) dev->signal],
2132 eni_dev->mem >> 10,eni_dev->tx_bw);
2133 if (!--left)
2134 return sprintf(page,"%4sBursts: TX"
2135 #if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \
2136 !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \
2137 !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \
2138 !defined(CONFIG_ATM_ENI_BURST_TX_2W)
2139 " none"
2140 #endif
2141 #ifdef CONFIG_ATM_ENI_BURST_TX_16W
2142 " 16W"
2143 #endif
2144 #ifdef CONFIG_ATM_ENI_BURST_TX_8W
2145 " 8W"
2146 #endif
2147 #ifdef CONFIG_ATM_ENI_BURST_TX_4W
2148 " 4W"
2149 #endif
2150 #ifdef CONFIG_ATM_ENI_BURST_TX_2W
2151 " 2W"
2152 #endif
2153 ", RX"
2154 #if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \
2155 !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \
2156 !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \
2157 !defined(CONFIG_ATM_ENI_BURST_RX_2W)
2158 " none"
2159 #endif
2160 #ifdef CONFIG_ATM_ENI_BURST_RX_16W
2161 " 16W"
2162 #endif
2163 #ifdef CONFIG_ATM_ENI_BURST_RX_8W
2164 " 8W"
2165 #endif
2166 #ifdef CONFIG_ATM_ENI_BURST_RX_4W
2167 " 4W"
2168 #endif
2169 #ifdef CONFIG_ATM_ENI_BURST_RX_2W
2170 " 2W"
2171 #endif
2172 #ifndef CONFIG_ATM_ENI_TUNE_BURST
2173 " (default)"
2174 #endif
2175 "\n","");
2176 if (!--left)
2177 return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n",
2178 "",eni_dev->tx_mult,eni_dev->rx_mult);
2179 for (i = 0; i < NR_CHAN; i++) {
2180 struct eni_tx *tx = eni_dev->tx+i;
2181
2182 if (!tx->send) continue;
2183 if (!--left) {
2184 return sprintf(page,"tx[%d]: 0x%06lx-0x%06lx "
2185 "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i,
2186 tx->send-eni_dev->ram,
2187 tx->send-eni_dev->ram+tx->words*4-1,tx->words*4,
2188 tx->reserved,tx->shaping,
2189 tx == eni_dev->ubr ? " (UBR)" : "");
2190 }
2191 if (--left) continue;
2192 return sprintf(page,"%10sbacklog %u packets\n","",
2193 skb_queue_len(&tx->backlog));
2194 }
2195 for (vcc = dev->vccs; vcc; vcc = vcc->next) {
2196 struct eni_vcc *eni_vcc = ENI_VCC(vcc);
2197 int length;
2198
2199 if (--left) continue;
2200 length = sprintf(page,"vcc %4d: ",vcc->vci);
2201 if (eni_vcc->rx) {
2202 length += sprintf(page+length,"0x%06lx-0x%06lx "
2203 "(%6ld bytes)",
2204 eni_vcc->recv-eni_dev->ram,
2205 eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1,
2206 eni_vcc->words*4);
2207 if (eni_vcc->tx) length += sprintf(page+length,", ");
2208 }
2209 if (eni_vcc->tx)
2210 length += sprintf(page+length,"tx[%d], txing %d bytes",
2211 eni_vcc->tx->index,eni_vcc->txing);
2212 page[length] = '\n';
2213 return length+1;
2214 }
2215 for (i = 0; i < eni_dev->free_len; i++) {
2216 struct eni_free *fe = eni_dev->free_list+i;
2217 unsigned long offset;
2218
2219 if (--left) continue;
2220 offset = eni_dev->ram+eni_dev->base_diff;
2221 return sprintf(page,"free 0x%06lx-0x%06lx (%6d bytes)\n",
2222 fe->start-offset,fe->start-offset+(1 << fe->order)-1,
2223 1 << fe->order);
2224 }
2225 return 0;
2226 }
2227
2228
2229 static const struct atmdev_ops ops = {
2230 open: eni_open,
2231 close: eni_close,
2232 ioctl: eni_ioctl,
2233 getsockopt: eni_getsockopt,
2234 setsockopt: eni_setsockopt,
2235 send: eni_send,
2236 sg_send: eni_sg_send,
2237 phy_put: eni_phy_put,
2238 phy_get: eni_phy_get,
2239 change_qos: eni_change_qos,
2240 proc_read: eni_proc_read
2241 };
2242
2243
2244 static int __devinit eni_init_one(struct pci_dev *pci_dev,
2245 const struct pci_device_id *ent)
2246 {
2247 struct atm_dev *dev;
2248 struct eni_dev *eni_dev;
2249 int error = -ENOMEM;
2250
2251 DPRINTK("eni_init_one\n");
2252
2253 MOD_INC_USE_COUNT; /* @@@ we don't support unloading yet */
2254
2255 if (pci_enable_device(pci_dev)) {
2256 error = -EIO;
2257 goto out0;
2258 }
2259
2260 eni_dev = (struct eni_dev *) kmalloc(sizeof(struct eni_dev),GFP_KERNEL);
2261 if (!eni_dev) goto out0;
2262 if (!cpu_zeroes) {
2263 cpu_zeroes = pci_alloc_consistent(pci_dev,ENI_ZEROES_SIZE,
2264 &zeroes);
2265 if (!cpu_zeroes) goto out1;
2266 }
2267 dev = atm_dev_register(DEV_LABEL,&ops,-1,NULL);
2268 if (!dev) goto out2;
2269 pci_dev->driver_data = dev;
2270 eni_dev->pci_dev = pci_dev;
2271 ENI_DEV(dev) = eni_dev;
2272 eni_dev->asic = ent->driver_data;
2273 error = eni_do_init(dev);
2274 if (error) goto out3;
2275 error = eni_start(dev);
2276 if (error) goto out3;
2277 eni_dev->more = eni_boards;
2278 eni_boards = dev;
2279 return 0;
2280 out3:
2281 atm_dev_deregister(dev);
2282 out2:
2283 pci_free_consistent(eni_dev->pci_dev,ENI_ZEROES_SIZE,cpu_zeroes,zeroes);
2284 cpu_zeroes = NULL;
2285 out1:
2286 kfree(eni_dev);
2287 out0:
2288 MOD_DEC_USE_COUNT; /* @@@ we don't support unloading yet */
2289 return error;
2290 }
2291
2292
2293 static struct pci_device_id eni_pci_tbl[] __devinitdata = {
2294 { PCI_VENDOR_ID_EF, PCI_DEVICE_ID_EF_ATM_FPGA, PCI_ANY_ID, PCI_ANY_ID,
2295 0, 0, 0 /* FPGA */ },
2296 { PCI_VENDOR_ID_EF, PCI_DEVICE_ID_EF_ATM_ASIC, PCI_ANY_ID, PCI_ANY_ID,
2297 0, 0, 1 /* ASIC */ },
2298 { 0, }
2299 };
2300 MODULE_DEVICE_TABLE(pci,eni_pci_tbl);
2301
2302
2303 static void __devexit eni_remove_one(struct pci_dev *pci_dev)
2304 {
2305 /* grrr */
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: 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 (%d < %d)\n",
2323 sizeof(skb->cb),sizeof(struct eni_skb_prv));
2324 return -EIO;
2325 }
2326 if (pci_register_driver(&eni_driver) > 0) return 0;
2327 pci_unregister_driver (&eni_driver);
2328 return -ENODEV;
2329 }
2330
2331
2332 static void __exit eni_cleanup(void)
2333 {
2334 /*
2335 * Well, there's no way to get rid of the driver yet, so we don't
2336 * have to clean up, right ? :-)
2337 */
2338 }
2339
2340
2341 module_init(eni_init);
2342 module_exit(eni_cleanup);
2343
2344 EXPORT_NO_SYMBOLS;
2345 MODULE_LICENSE("GPL");
2346