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initial commit with v2.6.9
[linux-2.6.9-moxart.git] / drivers / atm / eni.c
blob81127d178d1f67c9fb5af257a7f6d92c362db167
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/delay.h>
18 #include <linux/uio.h>
19 #include <linux/init.h>
20 #include <linux/atm_eni.h>
21 #include <linux/bitops.h>
22 #include <asm/system.h>
23 #include <asm/io.h>
24 #include <asm/atomic.h>
25 #include <asm/uaccess.h>
26 #include <asm/string.h>
27 #include <asm/byteorder.h>
28
29 #include "tonga.h"
30 #include "midway.h"
31 #include "suni.h"
32 #include "eni.h"
33
34 #if !defined(__i386__) && !defined(__x86_64__)
35 #ifndef ioremap_nocache
36 #define ioremap_nocache(X,Y) ioremap(X,Y)
37 #endif
38 #endif
39
40 /*
41 * TODO:
42 *
43 * Show stoppers
44 * none
45 *
46 * Minor
47 * - OAM support
48 * - fix bugs listed below
49 */
50
51 /*
52 * KNOWN BUGS:
53 *
54 * - may run into JK-JK bug and deadlock
55 * - should allocate UBR channel first
56 * - buffer space allocation algorithm is stupid
57 * (RX: should be maxSDU+maxdelay*rate
58 * TX: should be maxSDU+min(maxSDU,maxdelay*rate) )
59 * - doesn't support OAM cells
60 * - eni_put_free may hang if not putting memory fragments that _complete_
61 * 2^n block (never happens in real life, though)
62 * - keeps IRQ even if initialization fails
63 */
64
65
66 #if 0
67 #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
68 #else
69 #define DPRINTK(format,args...)
70 #endif
71
72
73 #ifndef CONFIG_ATM_ENI_TUNE_BURST
74 #define CONFIG_ATM_ENI_BURST_TX_8W
75 #define CONFIG_ATM_ENI_BURST_RX_4W
76 #endif
77
78
79 #ifndef CONFIG_ATM_ENI_DEBUG
80
81
82 #define NULLCHECK(x)
83
84 #define EVENT(s,a,b)
85
86
87 static void event_dump(void)
88 {
89 }
90
91
92 #else
93
94
95 /*
96 * NULL pointer checking
97 */
98
99 #define NULLCHECK(x) \
100 if ((unsigned long) (x) < 0x30) \
101 printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x))
102
103 /*
104 * Very extensive activity logging. Greatly improves bug detection speed but
105 * costs a few Mbps if enabled.
106 */
107
108 #define EV 64
109
110 static const char *ev[EV];
111 static unsigned long ev_a[EV],ev_b[EV];
112 static int ec = 0;
113
114
115 static void EVENT(const char *s,unsigned long a,unsigned long b)
116 {
117 ev[ec] = s;
118 ev_a[ec] = a;
119 ev_b[ec] = b;
120 ec = (ec+1) % EV;
121 }
122
123
124 static void event_dump(void)
125 {
126 int n,i;
127
128 for (n = 0; n < EV; n++) {
129 i = (ec+n) % EV;
130 printk(KERN_NOTICE);
131 printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]);
132 }
133 }
134
135
136 #endif /* CONFIG_ATM_ENI_DEBUG */
137
138
139 /*
140 * NExx must not be equal at end
141 * EExx may be equal at end
142 * xxPJOK verify validity of pointer jumps
143 * xxPMOK operating on a circular buffer of "c" words
144 */
145
146 #define NEPJOK(a0,a1,b) \
147 ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1))
148 #define EEPJOK(a0,a1,b) \
149 ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1))
150 #define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b)
151 #define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b)
152
153
154 static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0,
155 backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0,
156 putting = 0;
157
158 static struct atm_dev *eni_boards = NULL;
159
160 static u32 *cpu_zeroes = NULL; /* aligned "magic" zeroes */
161 static dma_addr_t zeroes;
162
163 /* Read/write registers on card */
164 #define eni_in(r) readl(eni_dev->reg+(r)*4)
165 #define eni_out(v,r) writel((v),eni_dev->reg+(r)*4)
166
167
168 /*-------------------------------- utilities --------------------------------*/
169
170
171 static void dump_mem(struct eni_dev *eni_dev)
172 {
173 int i;
174
175 for (i = 0; i < eni_dev->free_len; i++)
176 printk(KERN_DEBUG " %d: %p %d\n",i,
177 eni_dev->free_list[i].start,
178 1 << eni_dev->free_list[i].order);
179 }
180
181
182 static void dump(struct atm_dev *dev)
183 {
184 struct eni_dev *eni_dev;
185
186 int i;
187
188 eni_dev = ENI_DEV(dev);
189 printk(KERN_NOTICE "Free memory\n");
190 dump_mem(eni_dev);
191 printk(KERN_NOTICE "TX buffers\n");
192 for (i = 0; i < NR_CHAN; i++)
193 if (eni_dev->tx[i].send)
194 printk(KERN_NOTICE " TX %d @ %p: %ld\n",i,
195 eni_dev->tx[i].send,eni_dev->tx[i].words*4);
196 printk(KERN_NOTICE "RX buffers\n");
197 for (i = 0; i < 1024; i++)
198 if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx)
199 printk(KERN_NOTICE " RX %d @ %p: %ld\n",i,
200 ENI_VCC(eni_dev->rx_map[i])->recv,
201 ENI_VCC(eni_dev->rx_map[i])->words*4);
202 printk(KERN_NOTICE "----\n");
203 }
204
205
206 static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start,
207 unsigned long size)
208 {
209 struct eni_free *list;
210 int len,order;
211
212 DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size);
213 start += eni_dev->base_diff;
214 list = eni_dev->free_list;
215 len = eni_dev->free_len;
216 while (size) {
217 if (len >= eni_dev->free_list_size) {
218 printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n",
219 start,size);
220 break;
221 }
222 for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++);
223 if (MID_MIN_BUF_SIZE > (1 << order)) {
224 printk(KERN_CRIT "eni_put_free: order %d too small\n",
225 order);
226 break;
227 }
228 list[len].start = (void __iomem *) start;
229 list[len].order = order;
230 len++;
231 start += 1 << order;
232 size -= 1 << order;
233 }
234 eni_dev->free_len = len;
235 /*dump_mem(eni_dev);*/
236 }
237
238
239 static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size)
240 {
241 struct eni_free *list;
242 void __iomem *start;
243 int len,i,order,best_order,index;
244
245 list = eni_dev->free_list;
246 len = eni_dev->free_len;
247 if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE;
248 if (*size > MID_MAX_BUF_SIZE) return 0;
249 for (order = 0; (1 << order) < *size; order++);
250 DPRINTK("trying: %ld->%d\n",*size,order);
251 best_order = 65; /* we don't have more than 2^64 of anything ... */
252 index = 0; /* silence GCC */
253 for (i = 0; i < len; i++)
254 if (list[i].order == order) {
255 best_order = order;
256 index = i;
257 break;
258 }
259 else if (best_order > list[i].order && list[i].order > order) {
260 best_order = list[i].order;
261 index = i;
262 }
263 if (best_order == 65) return 0;
264 start = list[index].start-eni_dev->base_diff;
265 list[index] = list[--len];
266 eni_dev->free_len = len;
267 *size = 1 << order;
268 eni_put_free(eni_dev,start+*size,(1 << best_order)-*size);
269 DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start);
270 memset_io(start,0,*size); /* never leak data */
271 /*dump_mem(eni_dev);*/
272 return start;
273 }
274
275
276 static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start,
277 unsigned long size)
278 {
279 struct eni_free *list;
280 int len,i,order;
281
282 start += eni_dev->base_diff;
283 list = eni_dev->free_list;
284 len = eni_dev->free_len;
285 for (order = -1; size; order++) size >>= 1;
286 DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order);
287 for (i = 0; i < len; i++)
288 if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) &&
289 list[i].order == order) {
290 DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i,
291 list[i].start,start,1 << order,list[i].order,order);
292 list[i] = list[--len];
293 start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order));
294 order++;
295 i = -1;
296 continue;
297 }
298 if (len >= eni_dev->free_list_size) {
299 printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start,
300 order);
301 return;
302 }
303 list[len].start = start;
304 list[len].order = order;
305 eni_dev->free_len = len+1;
306 /*dump_mem(eni_dev);*/
307 }
308
309
310 /*----------------------------------- RX ------------------------------------*/
311
312
313 #define ENI_VCC_NOS ((struct atm_vcc *) 1)
314
315
316 static void rx_ident_err(struct atm_vcc *vcc)
317 {
318 struct atm_dev *dev;
319 struct eni_dev *eni_dev;
320 struct eni_vcc *eni_vcc;
321
322 dev = vcc->dev;
323 eni_dev = ENI_DEV(dev);
324 /* immediately halt adapter */
325 eni_out(eni_in(MID_MC_S) &
326 ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S);
327 /* dump useful information */
328 eni_vcc = ENI_VCC(vcc);
329 printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident "
330 "mismatch\n",dev->number);
331 printk(KERN_ALERT " VCI %d, rxing %d, words %ld\n",vcc->vci,
332 eni_vcc->rxing,eni_vcc->words);
333 printk(KERN_ALERT " host descr 0x%lx, rx pos 0x%lx, descr value "
334 "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos,
335 (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4));
336 printk(KERN_ALERT " last %p, servicing %d\n",eni_vcc->last,
337 eni_vcc->servicing);
338 EVENT("---dump ends here---\n",0,0);
339 printk(KERN_NOTICE "---recent events---\n");
340 event_dump();
341 ENI_DEV(dev)->fast = NULL; /* really stop it */
342 ENI_DEV(dev)->slow = NULL;
343 skb_queue_head_init(&ENI_DEV(dev)->rx_queue);
344 }
345
346
347 static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb,
348 unsigned long skip,unsigned long size,unsigned long eff)
349 {
350 struct eni_dev *eni_dev;
351 struct eni_vcc *eni_vcc;
352 u32 dma_rd,dma_wr;
353 u32 dma[RX_DMA_BUF*2];
354 dma_addr_t paddr;
355 unsigned long here;
356 int i,j;
357
358 eni_dev = ENI_DEV(vcc->dev);
359 eni_vcc = ENI_VCC(vcc);
360 paddr = 0; /* GCC, shut up */
361 if (skb) {
362 paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len,
363 PCI_DMA_FROMDEVICE);
364 ENI_PRV_PADDR(skb) = paddr;
365 if (paddr & 3)
366 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has "
367 "mis-aligned RX data (0x%lx)\n",vcc->dev->number,
368 vcc->vci,(unsigned long) paddr);
369 ENI_PRV_SIZE(skb) = size+skip;
370 /* PDU plus descriptor */
371 ATM_SKB(skb)->vcc = vcc;
372 }
373 j = 0;
374 if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */
375 here = (eni_vcc->descr+skip) & (eni_vcc->words-1);
376 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci
377 << MID_DMA_VCI_SHIFT) | MID_DT_JK;
378 j++;
379 }
380 here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1);
381 if (!eff) size += skip;
382 else {
383 unsigned long words;
384
385 if (!size) {
386 DPRINTK("strange things happen ...\n");
387 EVENT("strange things happen ... (skip=%ld,eff=%ld)\n",
388 size,eff);
389 }
390 words = eff;
391 if (paddr & 15) {
392 unsigned long init;
393
394 init = 4-((paddr & 15) >> 2);
395 if (init > words) init = words;
396 dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
397 (vcc->vci << MID_DMA_VCI_SHIFT);
398 dma[j++] = paddr;
399 paddr += init << 2;
400 words -= init;
401 }
402 #ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */
403 if (words & ~15) {
404 dma[j++] = MID_DT_16W | ((words >> 4) <<
405 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
406 MID_DMA_VCI_SHIFT);
407 dma[j++] = paddr;
408 paddr += (words & ~15) << 2;
409 words &= 15;
410 }
411 #endif
412 #ifdef CONFIG_ATM_ENI_BURST_RX_8W /* works only with *some* PCI chipsets ... */
413 if (words & ~7) {
414 dma[j++] = MID_DT_8W | ((words >> 3) <<
415 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
416 MID_DMA_VCI_SHIFT);
417 dma[j++] = paddr;
418 paddr += (words & ~7) << 2;
419 words &= 7;
420 }
421 #endif
422 #ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */
423 if (words & ~3) {
424 dma[j++] = MID_DT_4W | ((words >> 2) <<
425 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
426 MID_DMA_VCI_SHIFT);
427 dma[j++] = paddr;
428 paddr += (words & ~3) << 2;
429 words &= 3;
430 }
431 #endif
432 #ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */
433 if (words & ~1) {
434 dma[j++] = MID_DT_2W | ((words >> 1) <<
435 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
436 MID_DMA_VCI_SHIFT);
437 dma[j++] = paddr;
438 paddr += (words & ~1) << 2;
439 words &= 1;
440 }
441 #endif
442 if (words) {
443 dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT)
444 | (vcc->vci << MID_DMA_VCI_SHIFT);
445 dma[j++] = paddr;
446 }
447 }
448 if (size != eff) {
449 dma[j++] = (here << MID_DMA_COUNT_SHIFT) |
450 (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK;
451 j++;
452 }
453 if (!j || j > 2*RX_DMA_BUF) {
454 printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n");
455 goto trouble;
456 }
457 dma[j-2] |= MID_DMA_END;
458 j = j >> 1;
459 dma_wr = eni_in(MID_DMA_WR_RX);
460 dma_rd = eni_in(MID_DMA_RD_RX);
461 /*
462 * Can I move the dma_wr pointer by 2j+1 positions without overwriting
463 * data that hasn't been read (position of dma_rd) yet ?
464 */
465 if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */
466 printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n",
467 vcc->dev->number);
468 goto trouble;
469 }
470 for (i = 0; i < j; i++) {
471 writel(dma[i*2],eni_dev->rx_dma+dma_wr*8);
472 writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4);
473 dma_wr = (dma_wr+1) & (NR_DMA_RX-1);
474 }
475 if (skb) {
476 ENI_PRV_POS(skb) = eni_vcc->descr+size+1;
477 skb_queue_tail(&eni_dev->rx_queue,skb);
478 eni_vcc->last = skb;
479 rx_enqueued++;
480 }
481 eni_vcc->descr = here;
482 eni_out(dma_wr,MID_DMA_WR_RX);
483 return 0;
484
485 trouble:
486 if (paddr)
487 pci_unmap_single(eni_dev->pci_dev,paddr,skb->len,
488 PCI_DMA_FROMDEVICE);
489 if (skb) dev_kfree_skb_irq(skb);
490 return -1;
491 }
492
493
494 static void discard(struct atm_vcc *vcc,unsigned long size)
495 {
496 struct eni_vcc *eni_vcc;
497
498 eni_vcc = ENI_VCC(vcc);
499 EVENT("discard (size=%ld)\n",size,0);
500 while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0);
501 /* could do a full fallback, but that might be more expensive */
502 if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1;
503 else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1);
504 }
505
506
507 /*
508 * TODO: should check whether direct copies (without DMA setup, dequeuing on
509 * interrupt, etc.) aren't much faster for AAL0
510 */
511
512 static int rx_aal0(struct atm_vcc *vcc)
513 {
514 struct eni_vcc *eni_vcc;
515 unsigned long descr;
516 unsigned long length;
517 struct sk_buff *skb;
518
519 DPRINTK(">rx_aal0\n");
520 eni_vcc = ENI_VCC(vcc);
521 descr = readl(eni_vcc->recv+eni_vcc->descr*4);
522 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
523 rx_ident_err(vcc);
524 return 1;
525 }
526 if (descr & MID_RED_T) {
527 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
528 vcc->dev->number);
529 length = 0;
530 atomic_inc(&vcc->stats->rx_err);
531 }
532 else {
533 length = ATM_CELL_SIZE-1; /* no HEC */
534 }
535 skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL;
536 if (!skb) {
537 discard(vcc,length >> 2);
538 return 0;
539 }
540 skb_put(skb,length);
541 skb->stamp = eni_vcc->timestamp;
542 DPRINTK("got len %ld\n",length);
543 if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1;
544 eni_vcc->rxing++;
545 return 0;
546 }
547
548
549 static int rx_aal5(struct atm_vcc *vcc)
550 {
551 struct eni_vcc *eni_vcc;
552 unsigned long descr;
553 unsigned long size,eff,length;
554 struct sk_buff *skb;
555
556 EVENT("rx_aal5\n",0,0);
557 DPRINTK(">rx_aal5\n");
558 eni_vcc = ENI_VCC(vcc);
559 descr = readl(eni_vcc->recv+eni_vcc->descr*4);
560 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
561 rx_ident_err(vcc);
562 return 1;
563 }
564 if (descr & (MID_RED_T | MID_RED_CRC_ERR)) {
565 if (descr & MID_RED_T) {
566 EVENT("empty cell (descr=0x%lx)\n",descr,0);
567 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
568 vcc->dev->number);
569 size = 0;
570 }
571 else {
572 static unsigned long silence = 0;
573
574 if (time_after(jiffies, silence) || silence == 0) {
575 printk(KERN_WARNING DEV_LABEL "(itf %d): "
576 "discarding PDU(s) with CRC error\n",
577 vcc->dev->number);
578 silence = (jiffies+2*HZ)|1;
579 }
580 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
581 EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr,
582 size);
583 }
584 eff = length = 0;
585 atomic_inc(&vcc->stats->rx_err);
586 }
587 else {
588 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
589 DPRINTK("size=%ld\n",size);
590 length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) &
591 (eni_vcc->words-1)))*4) & 0xffff;
592 /* -trailer(2)+header(1) */
593 if (length && length <= (size << 2)-8 && length <=
594 ATM_MAX_AAL5_PDU) eff = (length+3) >> 2;
595 else { /* ^ trailer length (8) */
596 EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr,
597 length);
598 printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU "
599 "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n",
600 vcc->dev->number,vcc->vci,length,size << 2,descr);
601 length = eff = 0;
602 atomic_inc(&vcc->stats->rx_err);
603 }
604 }
605 skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL;
606 if (!skb) {
607 discard(vcc,size);
608 return 0;
609 }
610 skb_put(skb,length);
611 DPRINTK("got len %ld\n",length);
612 if (do_rx_dma(vcc,skb,1,size,eff)) return 1;
613 eni_vcc->rxing++;
614 return 0;
615 }
616
617
618 static inline int rx_vcc(struct atm_vcc *vcc)
619 {
620 void __iomem *vci_dsc;
621 unsigned long 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 do_gettimeofday(&ENI_VCC(vcc)->timestamp);
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 void __iomem *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 void __iomem *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 void __iomem *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_zeroed_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",skb_shinfo(skb)->nr_frags);
1105 if (!skb_shinfo(skb)->nr_frags) dma_size += 5;
1106 else dma_size += 5*(skb_shinfo(skb)->nr_frags+1);
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 (!skb_shinfo(skb)->nr_frags)
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 = -1; i < skb_shinfo(skb)->nr_frags; i++)
1133 if (i == -1)
1134 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1135 skb->data,
1136 skb->len - skb->data_len);
1137 else
1138 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1139 skb_shinfo(skb)->frags[i].page + skb_shinfo(skb)->frags[i].page_offset,
1140 skb_shinfo(skb)->frags[i].size);
1141 }
1142 if (skb->len & 3)
1143 put_dma(tx->index,eni_dev->dma,&j,zeroes,4-(skb->len & 3));
1144 /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */
1145 eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) <<
1146 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1147 MID_DMA_END | MID_DT_JK;
1148 j++;
1149 DPRINTK("DMA at end: %d\n",j);
1150 /* store frame */
1151 writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) |
1152 (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) |
1153 (tx->resolution << MID_SEG_RATE_SHIFT) |
1154 (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4);
1155 /*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/
1156 writel((vcc->vci << MID_SEG_VCI_SHIFT) |
1157 (aal5 ? 0 : (skb->data[3] & 0xf)) |
1158 (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0),
1159 tx->send+((tx->tx_pos+1) & (tx->words-1))*4);
1160 DPRINTK("size: %d, len:%d\n",size,skb->len);
1161 if (aal5)
1162 writel(skb->len,tx->send+
1163 ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4);
1164 j = j >> 1;
1165 for (i = 0; i < j; i++) {
1166 writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8);
1167 writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4);
1168 dma_wr = (dma_wr+1) & (NR_DMA_TX-1);
1169 }
1170 ENI_PRV_POS(skb) = tx->tx_pos;
1171 ENI_PRV_SIZE(skb) = size;
1172 ENI_VCC(vcc)->txing += size;
1173 tx->tx_pos = (tx->tx_pos+size) & (tx->words-1);
1174 DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos);
1175 eni_out(dma_wr,MID_DMA_WR_TX);
1176 skb_queue_tail(&eni_dev->tx_queue,skb);
1177 queued++;
1178 return enq_ok;
1179 }
1180
1181
1182 static void poll_tx(struct atm_dev *dev)
1183 {
1184 struct eni_tx *tx;
1185 struct sk_buff *skb;
1186 enum enq_res res;
1187 int i;
1188
1189 DPRINTK(">poll_tx\n");
1190 for (i = NR_CHAN-1; i >= 0; i--) {
1191 tx = &ENI_DEV(dev)->tx[i];
1192 if (tx->send)
1193 while ((skb = skb_dequeue(&tx->backlog))) {
1194 res = do_tx(skb);
1195 if (res == enq_ok) continue;
1196 DPRINTK("re-queuing TX PDU\n");
1197 skb_queue_head(&tx->backlog,skb);
1198 requeued++;
1199 if (res == enq_jam) return;
1200 break;
1201 }
1202 }
1203 }
1204
1205
1206 static void dequeue_tx(struct atm_dev *dev)
1207 {
1208 struct eni_dev *eni_dev;
1209 struct atm_vcc *vcc;
1210 struct sk_buff *skb;
1211 struct eni_tx *tx;
1212
1213 NULLCHECK(dev);
1214 eni_dev = ENI_DEV(dev);
1215 NULLCHECK(eni_dev);
1216 while ((skb = skb_dequeue(&eni_dev->tx_queue))) {
1217 vcc = ATM_SKB(skb)->vcc;
1218 NULLCHECK(vcc);
1219 tx = ENI_VCC(vcc)->tx;
1220 NULLCHECK(ENI_VCC(vcc)->tx);
1221 DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb),
1222 (unsigned) eni_in(MID_TX_DESCRSTART(tx->index)));
1223 if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) ==
1224 eni_in(MID_TX_DESCRSTART(tx->index))) {
1225 skb_queue_head(&eni_dev->tx_queue,skb);
1226 break;
1227 }
1228 ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb);
1229 pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len,
1230 PCI_DMA_TODEVICE);
1231 if (vcc->pop) vcc->pop(vcc,skb);
1232 else dev_kfree_skb_irq(skb);
1233 atomic_inc(&vcc->stats->tx);
1234 wake_up(&eni_dev->tx_wait);
1235 dma_complete++;
1236 }
1237 }
1238
1239
1240 static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr)
1241 {
1242 int i;
1243
1244 for (i = !ubr; i < NR_CHAN; i++)
1245 if (!eni_dev->tx[i].send) return eni_dev->tx+i;
1246 return NULL;
1247 }
1248
1249
1250 static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre,
1251 int *res,int unlimited)
1252 {
1253 static const int pre_div[] = { 4,16,128,2048 };
1254 /* 2^(((x+2)^2-(x+2))/2+1) */
1255
1256 if (unlimited) *pre = *res = 0;
1257 else {
1258 if (*pcr > 0) {
1259 int div;
1260
1261 for (*pre = 0; *pre < 3; (*pre)++)
1262 if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break;
1263 div = pre_div[*pre]**pcr;
1264 DPRINTK("min div %d\n",div);
1265 *res = TS_CLOCK/div-1;
1266 }
1267 else {
1268 int div;
1269
1270 if (!*pcr) *pcr = eni_dev->tx_bw+reserved;
1271 for (*pre = 3; *pre >= 0; (*pre)--)
1272 if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break;
1273 if (*pre < 3) (*pre)++; /* else fail later */
1274 div = pre_div[*pre]*-*pcr;
1275 DPRINTK("max div %d\n",div);
1276 *res = (TS_CLOCK+div-1)/div-1;
1277 }
1278 if (*res < 0) *res = 0;
1279 if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE;
1280 }
1281 *pcr = TS_CLOCK/pre_div[*pre]/(*res+1);
1282 DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res);
1283 return 0;
1284 }
1285
1286
1287 static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp,
1288 int set_rsv,int set_shp)
1289 {
1290 struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1291 struct eni_vcc *eni_vcc = ENI_VCC(vcc);
1292 struct eni_tx *tx;
1293 unsigned long size;
1294 void __iomem *mem;
1295 int rate,ubr,unlimited,new_tx;
1296 int pre,res,order;
1297 int error;
1298
1299 rate = atm_pcr_goal(txtp);
1300 ubr = txtp->traffic_class == ATM_UBR;
1301 unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR ||
1302 rate >= ATM_OC3_PCR);
1303 if (!unlimited) {
1304 size = txtp->max_sdu*eni_dev->tx_mult/100;
1305 if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <=
1306 MID_MAX_BUF_SIZE)
1307 size = MID_MAX_BUF_SIZE;
1308 }
1309 else {
1310 if (eni_dev->ubr) {
1311 eni_vcc->tx = eni_dev->ubr;
1312 txtp->pcr = ATM_OC3_PCR;
1313 return 0;
1314 }
1315 size = UBR_BUFFER;
1316 }
1317 new_tx = !eni_vcc->tx;
1318 mem = 0; /* for gcc */
1319 if (!new_tx) tx = eni_vcc->tx;
1320 else {
1321 mem = eni_alloc_mem(eni_dev,&size);
1322 if (!mem) return -ENOBUFS;
1323 tx = alloc_tx(eni_dev,unlimited);
1324 if (!tx) {
1325 eni_free_mem(eni_dev,mem,size);
1326 return -EBUSY;
1327 }
1328 DPRINTK("got chan %d\n",tx->index);
1329 tx->reserved = tx->shaping = 0;
1330 tx->send = mem;
1331 tx->words = size >> 2;
1332 skb_queue_head_init(&tx->backlog);
1333 for (order = 0; size > (1 << (order+10)); order++);
1334 eni_out((order << MID_SIZE_SHIFT) |
1335 ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)),
1336 MID_TX_PLACE(tx->index));
1337 tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) &
1338 MID_DESCR_START;
1339 }
1340 error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited);
1341 if (!error && txtp->min_pcr > rate) error = -EINVAL;
1342 if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR &&
1343 txtp->max_pcr < rate) error = -EINVAL;
1344 if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved)
1345 error = -EINVAL;
1346 if (!error && set_rsv && !set_shp && rate < tx->shaping)
1347 error = -EINVAL;
1348 if (!error && !set_rsv && rate > tx->reserved && !ubr)
1349 error = -EINVAL;
1350 if (error) {
1351 if (new_tx) {
1352 tx->send = 0;
1353 eni_free_mem(eni_dev,mem,size);
1354 }
1355 return error;
1356 }
1357 txtp->pcr = rate;
1358 if (set_rsv && !ubr) {
1359 eni_dev->tx_bw += tx->reserved;
1360 tx->reserved = rate;
1361 eni_dev->tx_bw -= rate;
1362 }
1363 if (set_shp || (unlimited && new_tx)) {
1364 if (unlimited && new_tx) eni_dev->ubr = tx;
1365 tx->prescaler = pre;
1366 tx->resolution = res;
1367 tx->shaping = rate;
1368 }
1369 if (set_shp) eni_vcc->tx = tx;
1370 DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping);
1371 return 0;
1372 }
1373
1374
1375 static int open_tx_first(struct atm_vcc *vcc)
1376 {
1377 ENI_VCC(vcc)->tx = NULL;
1378 if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0;
1379 ENI_VCC(vcc)->txing = 0;
1380 return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1);
1381 }
1382
1383
1384 static int open_tx_second(struct atm_vcc *vcc)
1385 {
1386 return 0; /* nothing to do */
1387 }
1388
1389
1390 static void close_tx(struct atm_vcc *vcc)
1391 {
1392 DECLARE_WAITQUEUE(wait,current);
1393 struct eni_dev *eni_dev;
1394 struct eni_vcc *eni_vcc;
1395
1396 eni_vcc = ENI_VCC(vcc);
1397 if (!eni_vcc->tx) return;
1398 eni_dev = ENI_DEV(vcc->dev);
1399 /* wait for TX queue to drain */
1400 DPRINTK("eni_close: waiting for TX ...\n");
1401 add_wait_queue(&eni_dev->tx_wait,&wait);
1402 set_current_state(TASK_UNINTERRUPTIBLE);
1403 for (;;) {
1404 int txing;
1405
1406 tasklet_disable(&eni_dev->task);
1407 txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing;
1408 tasklet_enable(&eni_dev->task);
1409 if (!txing) break;
1410 DPRINTK("%d TX left\n",eni_vcc->txing);
1411 schedule();
1412 set_current_state(TASK_UNINTERRUPTIBLE);
1413 }
1414 set_current_state(TASK_RUNNING);
1415 remove_wait_queue(&eni_dev->tx_wait,&wait);
1416 if (eni_vcc->tx != eni_dev->ubr) {
1417 /*
1418 * Looping a few times in here is probably far cheaper than
1419 * keeping track of TX completions all the time, so let's poll
1420 * a bit ...
1421 */
1422 while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) !=
1423 eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index)))
1424 schedule();
1425 eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2);
1426 eni_vcc->tx->send = 0;
1427 eni_dev->tx_bw += eni_vcc->tx->reserved;
1428 }
1429 eni_vcc->tx = NULL;
1430 }
1431
1432
1433 static int start_tx(struct atm_dev *dev)
1434 {
1435 struct eni_dev *eni_dev;
1436 int i;
1437
1438 eni_dev = ENI_DEV(dev);
1439 eni_dev->lost = 0;
1440 eni_dev->tx_bw = ATM_OC3_PCR;
1441 eni_dev->tx_mult = DEFAULT_TX_MULT;
1442 init_waitqueue_head(&eni_dev->tx_wait);
1443 eni_dev->ubr = NULL;
1444 skb_queue_head_init(&eni_dev->tx_queue);
1445 eni_out(0,MID_DMA_WR_TX);
1446 for (i = 0; i < NR_CHAN; i++) {
1447 eni_dev->tx[i].send = 0;
1448 eni_dev->tx[i].index = i;
1449 }
1450 return 0;
1451 }
1452
1453
1454 /*--------------------------------- common ----------------------------------*/
1455
1456
1457 #if 0 /* may become useful again when tuning things */
1458
1459 static void foo(void)
1460 {
1461 printk(KERN_INFO
1462 "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n"
1463 "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n",
1464 tx_complete,dma_complete,queued,requeued,submitted,backlogged,
1465 rx_enqueued,rx_dequeued,putting,pushed);
1466 if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost);
1467 }
1468
1469 #endif
1470
1471
1472 static void bug_int(struct atm_dev *dev,unsigned long reason)
1473 {
1474 struct eni_dev *eni_dev;
1475
1476 DPRINTK(">bug_int\n");
1477 eni_dev = ENI_DEV(dev);
1478 if (reason & MID_DMA_ERR_ACK)
1479 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1480 "error\n",dev->number);
1481 if (reason & MID_TX_IDENT_MISM)
1482 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident "
1483 "mismatch\n",dev->number);
1484 if (reason & MID_TX_DMA_OVFL)
1485 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1486 "overflow\n",dev->number);
1487 EVENT("---dump ends here---\n",0,0);
1488 printk(KERN_NOTICE "---recent events---\n");
1489 event_dump();
1490 }
1491
1492
1493 static irqreturn_t eni_int(int irq,void *dev_id,struct pt_regs *regs)
1494 {
1495 struct atm_dev *dev;
1496 struct eni_dev *eni_dev;
1497 u32 reason;
1498
1499 DPRINTK(">eni_int\n");
1500 dev = dev_id;
1501 eni_dev = ENI_DEV(dev);
1502 reason = eni_in(MID_ISA);
1503 DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason);
1504 /*
1505 * Must handle these two right now, because reading ISA doesn't clear
1506 * them, so they re-occur and we never make it to the tasklet. Since
1507 * they're rare, we don't mind the occasional invocation of eni_tasklet
1508 * with eni_dev->events == 0.
1509 */
1510 if (reason & MID_STAT_OVFL) {
1511 EVENT("stat overflow\n",0,0);
1512 eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH;
1513 }
1514 if (reason & MID_SUNI_INT) {
1515 EVENT("SUNI int\n",0,0);
1516 dev->phy->interrupt(dev);
1517 #if 0
1518 foo();
1519 #endif
1520 }
1521 spin_lock(&eni_dev->lock);
1522 eni_dev->events |= reason;
1523 spin_unlock(&eni_dev->lock);
1524 tasklet_schedule(&eni_dev->task);
1525 return IRQ_HANDLED;
1526 }
1527
1528
1529 static void eni_tasklet(unsigned long data)
1530 {
1531 struct atm_dev *dev = (struct atm_dev *) data;
1532 struct eni_dev *eni_dev = ENI_DEV(dev);
1533 unsigned long flags;
1534 u32 events;
1535
1536 DPRINTK("eni_tasklet (dev %p)\n",dev);
1537 spin_lock_irqsave(&eni_dev->lock,flags);
1538 events = xchg(&eni_dev->events,0);
1539 spin_unlock_irqrestore(&eni_dev->lock,flags);
1540 if (events & MID_RX_DMA_COMPLETE) {
1541 EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0);
1542 dequeue_rx(dev);
1543 EVENT("dequeue_rx done, starting poll_rx\n",0,0);
1544 poll_rx(dev);
1545 EVENT("poll_rx done\n",0,0);
1546 /* poll_tx ? */
1547 }
1548 if (events & MID_SERVICE) {
1549 EVENT("INT: service, starting get_service\n",0,0);
1550 get_service(dev);
1551 EVENT("get_service done, starting poll_rx\n",0,0);
1552 poll_rx(dev);
1553 EVENT("poll_rx done\n",0,0);
1554 }
1555 if (events & MID_TX_DMA_COMPLETE) {
1556 EVENT("INT: TX DMA COMPLETE\n",0,0);
1557 dequeue_tx(dev);
1558 }
1559 if (events & MID_TX_COMPLETE) {
1560 EVENT("INT: TX COMPLETE\n",0,0);
1561 tx_complete++;
1562 wake_up(&eni_dev->tx_wait);
1563 /* poll_rx ? */
1564 }
1565 if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) {
1566 EVENT("bug interrupt\n",0,0);
1567 bug_int(dev,events);
1568 }
1569 poll_tx(dev);
1570 }
1571
1572
1573 /*--------------------------------- entries ---------------------------------*/
1574
1575
1576 static const char *media_name[] __devinitdata = {
1577 "MMF", "SMF", "MMF", "03?", /* 0- 3 */
1578 "UTP", "05?", "06?", "07?", /* 4- 7 */
1579 "TAXI","09?", "10?", "11?", /* 8-11 */
1580 "12?", "13?", "14?", "15?", /* 12-15 */
1581 "MMF", "SMF", "18?", "19?", /* 16-19 */
1582 "UTP", "21?", "22?", "23?", /* 20-23 */
1583 "24?", "25?", "26?", "27?", /* 24-27 */
1584 "28?", "29?", "30?", "31?" /* 28-31 */
1585 };
1586
1587
1588 #define SET_SEPROM \
1589 ({ if (!error && !pci_error) { \
1590 pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \
1591 udelay(10); /* 10 usecs */ \
1592 } })
1593 #define GET_SEPROM \
1594 ({ if (!error && !pci_error) { \
1595 pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \
1596 udelay(10); /* 10 usecs */ \
1597 } })
1598
1599
1600 static int __devinit get_esi_asic(struct atm_dev *dev)
1601 {
1602 struct eni_dev *eni_dev;
1603 unsigned char tonga;
1604 int error,failed,pci_error;
1605 int address,i,j;
1606
1607 eni_dev = ENI_DEV(dev);
1608 error = pci_error = 0;
1609 tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK;
1610 SET_SEPROM;
1611 for (i = 0; i < ESI_LEN && !error && !pci_error; i++) {
1612 /* start operation */
1613 tonga |= SEPROM_DATA;
1614 SET_SEPROM;
1615 tonga |= SEPROM_CLK;
1616 SET_SEPROM;
1617 tonga &= ~SEPROM_DATA;
1618 SET_SEPROM;
1619 tonga &= ~SEPROM_CLK;
1620 SET_SEPROM;
1621 /* send address */
1622 address = ((i+SEPROM_ESI_BASE) << 1)+1;
1623 for (j = 7; j >= 0; j--) {
1624 tonga = (address >> j) & 1 ? tonga | SEPROM_DATA :
1625 tonga & ~SEPROM_DATA;
1626 SET_SEPROM;
1627 tonga |= SEPROM_CLK;
1628 SET_SEPROM;
1629 tonga &= ~SEPROM_CLK;
1630 SET_SEPROM;
1631 }
1632 /* get ack */
1633 tonga |= SEPROM_DATA;
1634 SET_SEPROM;
1635 tonga |= SEPROM_CLK;
1636 SET_SEPROM;
1637 GET_SEPROM;
1638 failed = tonga & SEPROM_DATA;
1639 tonga &= ~SEPROM_CLK;
1640 SET_SEPROM;
1641 tonga |= SEPROM_DATA;
1642 SET_SEPROM;
1643 if (failed) error = -EIO;
1644 else {
1645 dev->esi[i] = 0;
1646 for (j = 7; j >= 0; j--) {
1647 dev->esi[i] <<= 1;
1648 tonga |= SEPROM_DATA;
1649 SET_SEPROM;
1650 tonga |= SEPROM_CLK;
1651 SET_SEPROM;
1652 GET_SEPROM;
1653 if (tonga & SEPROM_DATA) dev->esi[i] |= 1;
1654 tonga &= ~SEPROM_CLK;
1655 SET_SEPROM;
1656 tonga |= SEPROM_DATA;
1657 SET_SEPROM;
1658 }
1659 /* get ack */
1660 tonga |= SEPROM_DATA;
1661 SET_SEPROM;
1662 tonga |= SEPROM_CLK;
1663 SET_SEPROM;
1664 GET_SEPROM;
1665 if (!(tonga & SEPROM_DATA)) error = -EIO;
1666 tonga &= ~SEPROM_CLK;
1667 SET_SEPROM;
1668 tonga |= SEPROM_DATA;
1669 SET_SEPROM;
1670 }
1671 /* stop operation */
1672 tonga &= ~SEPROM_DATA;
1673 SET_SEPROM;
1674 tonga |= SEPROM_CLK;
1675 SET_SEPROM;
1676 tonga |= SEPROM_DATA;
1677 SET_SEPROM;
1678 }
1679 if (pci_error) {
1680 printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI "
1681 "(0x%02x)\n",dev->number,pci_error);
1682 error = -EIO;
1683 }
1684 return error;
1685 }
1686
1687
1688 #undef SET_SEPROM
1689 #undef GET_SEPROM
1690
1691
1692 static int __devinit get_esi_fpga(struct atm_dev *dev, void __iomem *base)
1693 {
1694 void __iomem *mac_base;
1695 int i;
1696
1697 mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom);
1698 for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3));
1699 return 0;
1700 }
1701
1702
1703 static int __devinit eni_do_init(struct atm_dev *dev)
1704 {
1705 struct midway_eprom *eprom;
1706 struct eni_dev *eni_dev;
1707 struct pci_dev *pci_dev;
1708 unsigned long real_base;
1709 void __iomem *base;
1710 unsigned char revision;
1711 int error,i,last;
1712
1713 DPRINTK(">eni_init\n");
1714 dev->ci_range.vpi_bits = 0;
1715 dev->ci_range.vci_bits = NR_VCI_LD;
1716 dev->link_rate = ATM_OC3_PCR;
1717 eni_dev = ENI_DEV(dev);
1718 pci_dev = eni_dev->pci_dev;
1719 real_base = pci_resource_start(pci_dev, 0);
1720 eni_dev->irq = pci_dev->irq;
1721 error = pci_read_config_byte(pci_dev,PCI_REVISION_ID,&revision);
1722 if (error) {
1723 printk(KERN_ERR DEV_LABEL "(itf %d): init error 0x%02x\n",
1724 dev->number,error);
1725 return -EINVAL;
1726 }
1727 if ((error = pci_write_config_word(pci_dev,PCI_COMMAND,
1728 PCI_COMMAND_MEMORY |
1729 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1730 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory "
1731 "(0x%02x)\n",dev->number,error);
1732 return -EIO;
1733 }
1734 printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,",
1735 dev->number,revision,real_base,eni_dev->irq);
1736 if (!(base = ioremap_nocache(real_base,MAP_MAX_SIZE))) {
1737 printk("\n");
1738 printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page "
1739 "mapping\n",dev->number);
1740 return error;
1741 }
1742 eni_dev->base_diff = real_base - (unsigned long) base;
1743 /* id may not be present in ASIC Tonga boards - check this @@@ */
1744 if (!eni_dev->asic) {
1745 eprom = (struct midway_eprom *) (base+EPROM_SIZE-sizeof(struct
1746 midway_eprom));
1747 if (readl(&eprom->magic) != ENI155_MAGIC) {
1748 printk("\n");
1749 printk(KERN_ERR KERN_ERR DEV_LABEL "(itf %d): bad "
1750 "magic - expected 0x%x, got 0x%x\n",dev->number,
1751 ENI155_MAGIC,(unsigned) readl(&eprom->magic));
1752 return -EINVAL;
1753 }
1754 }
1755 eni_dev->phy = base+PHY_BASE;
1756 eni_dev->reg = base+REG_BASE;
1757 eni_dev->ram = base+RAM_BASE;
1758 last = MAP_MAX_SIZE-RAM_BASE;
1759 for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) {
1760 writel(0x55555555,eni_dev->ram+i);
1761 if (readl(eni_dev->ram+i) != 0x55555555) last = i;
1762 else {
1763 writel(0xAAAAAAAA,eni_dev->ram+i);
1764 if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i;
1765 else writel(i,eni_dev->ram+i);
1766 }
1767 }
1768 for (i = 0; i < last; i += RAM_INCREMENT)
1769 if (readl(eni_dev->ram+i) != i) break;
1770 eni_dev->mem = i;
1771 memset_io(eni_dev->ram,0,eni_dev->mem);
1772 /* TODO: should shrink allocation now */
1773 printk("mem=%dkB (",eni_dev->mem >> 10);
1774 /* TODO: check for non-SUNI, check for TAXI ? */
1775 if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) {
1776 printk(")\n");
1777 printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n",
1778 dev->number,(unsigned) eni_in(MID_RES_ID_MCON));
1779 return -EINVAL;
1780 }
1781 error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base);
1782 if (error) return error;
1783 for (i = 0; i < ESI_LEN; i++)
1784 printk("%s%02X",i ? "-" : "",dev->esi[i]);
1785 printk(")\n");
1786 printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number,
1787 eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA",
1788 media_name[eni_in(MID_RES_ID_MCON) & DAUGTHER_ID]);
1789 return suni_init(dev);
1790 }
1791
1792
1793 static int __devinit eni_start(struct atm_dev *dev)
1794 {
1795 struct eni_dev *eni_dev;
1796
1797 void __iomem *buf;
1798 unsigned long buffer_mem;
1799 int error;
1800
1801 DPRINTK(">eni_start\n");
1802 eni_dev = ENI_DEV(dev);
1803 if (request_irq(eni_dev->irq,&eni_int,SA_SHIRQ,DEV_LABEL,dev)) {
1804 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
1805 dev->number,eni_dev->irq);
1806 return -EAGAIN;
1807 }
1808 /* @@@ should release IRQ on error */
1809 pci_set_master(eni_dev->pci_dev);
1810 if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND,
1811 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
1812 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1813 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+"
1814 "master (0x%02x)\n",dev->number,error);
1815 return error;
1816 }
1817 if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,
1818 END_SWAP_DMA))) {
1819 printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap "
1820 "(0x%02x)\n",dev->number,error);
1821 return error;
1822 }
1823 /* determine addresses of internal tables */
1824 eni_dev->vci = eni_dev->ram;
1825 eni_dev->rx_dma = eni_dev->ram+NR_VCI*16;
1826 eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8;
1827 eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8;
1828 buf = eni_dev->service+NR_SERVICE*4;
1829 DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n",
1830 eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma,
1831 eni_dev->service,buf);
1832 spin_lock_init(&eni_dev->lock);
1833 tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev);
1834 eni_dev->events = 0;
1835 /* initialize memory management */
1836 buffer_mem = eni_dev->mem - (buf - eni_dev->ram);
1837 eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2;
1838 eni_dev->free_list = (struct eni_free *) kmalloc(
1839 sizeof(struct eni_free)*(eni_dev->free_list_size+1),GFP_KERNEL);
1840 if (!eni_dev->free_list) {
1841 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
1842 dev->number);
1843 return -ENOMEM;
1844 }
1845 eni_dev->free_len = 0;
1846 eni_put_free(eni_dev,buf,buffer_mem);
1847 memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */
1848 /*
1849 * byte_addr free (k)
1850 * 0x00000000 512 VCI table
1851 * 0x00004000 496 RX DMA
1852 * 0x00005000 492 TX DMA
1853 * 0x00006000 488 service list
1854 * 0x00007000 484 buffers
1855 * 0x00080000 0 end (512kB)
1856 */
1857 eni_out(0xffffffff,MID_IE);
1858 error = start_tx(dev);
1859 if (error) return error;
1860 error = start_rx(dev);
1861 if (error) return error;
1862 error = dev->phy->start(dev);
1863 if (error) return error;
1864 eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) |
1865 MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE,
1866 MID_MC_S);
1867 /* Tonga uses SBus INTReq1 */
1868 (void) eni_in(MID_ISA); /* clear Midway interrupts */
1869 return 0;
1870 }
1871
1872
1873 static void eni_close(struct atm_vcc *vcc)
1874 {
1875 DPRINTK(">eni_close\n");
1876 if (!ENI_VCC(vcc)) return;
1877 clear_bit(ATM_VF_READY,&vcc->flags);
1878 close_rx(vcc);
1879 close_tx(vcc);
1880 DPRINTK("eni_close: done waiting\n");
1881 /* deallocate memory */
1882 kfree(ENI_VCC(vcc));
1883 vcc->dev_data = NULL;
1884 clear_bit(ATM_VF_ADDR,&vcc->flags);
1885 /*foo();*/
1886 }
1887
1888
1889 static int eni_open(struct atm_vcc *vcc)
1890 {
1891 struct eni_dev *eni_dev;
1892 struct eni_vcc *eni_vcc;
1893 int error;
1894 short vpi = vcc->vpi;
1895 int vci = vcc->vci;
1896
1897 DPRINTK(">eni_open\n");
1898 EVENT("eni_open\n",0,0);
1899 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1900 vcc->dev_data = NULL;
1901 eni_dev = ENI_DEV(vcc->dev);
1902 if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
1903 set_bit(ATM_VF_ADDR,&vcc->flags);
1904 if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5)
1905 return -EINVAL;
1906 DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi,
1907 vcc->vci);
1908 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
1909 eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL);
1910 if (!eni_vcc) return -ENOMEM;
1911 vcc->dev_data = eni_vcc;
1912 eni_vcc->tx = NULL; /* for eni_close after open_rx */
1913 if ((error = open_rx_first(vcc))) {
1914 eni_close(vcc);
1915 return error;
1916 }
1917 if ((error = open_tx_first(vcc))) {
1918 eni_close(vcc);
1919 return error;
1920 }
1921 }
1922 if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0;
1923 if ((error = open_rx_second(vcc))) {
1924 eni_close(vcc);
1925 return error;
1926 }
1927 if ((error = open_tx_second(vcc))) {
1928 eni_close(vcc);
1929 return error;
1930 }
1931 set_bit(ATM_VF_READY,&vcc->flags);
1932 /* should power down SUNI while !ref_count @@@ */
1933 return 0;
1934 }
1935
1936
1937 static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs)
1938 {
1939 struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1940 struct eni_tx *tx = ENI_VCC(vcc)->tx;
1941 struct sk_buff *skb;
1942 int error,rate,rsv,shp;
1943
1944 if (qos->txtp.traffic_class == ATM_NONE) return 0;
1945 if (tx == eni_dev->ubr) return -EBADFD;
1946 rate = atm_pcr_goal(&qos->txtp);
1947 if (rate < 0) rate = -rate;
1948 rsv = shp = 0;
1949 if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1;
1950 if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1;
1951 if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1;
1952 if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1;
1953 if (!rsv && !shp) return 0;
1954 error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp);
1955 if (error) return error;
1956 if (shp && !(flgs & ATM_MF_IMMED)) return 0;
1957 /*
1958 * Walk through the send buffer and patch the rate information in all
1959 * segmentation buffer descriptors of this VCC.
1960 */
1961 tasklet_disable(&eni_dev->task);
1962 skb_queue_walk(&eni_dev->tx_queue, skb) {
1963 void __iomem *dsc;
1964
1965 if (ATM_SKB(skb)->vcc != vcc) continue;
1966 dsc = tx->send+ENI_PRV_POS(skb)*4;
1967 writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) |
1968 (tx->prescaler << MID_SEG_PR_SHIFT) |
1969 (tx->resolution << MID_SEG_RATE_SHIFT), dsc);
1970 }
1971 tasklet_enable(&eni_dev->task);
1972 return 0;
1973 }
1974
1975
1976 static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
1977 {
1978 struct eni_dev *eni_dev = ENI_DEV(dev);
1979
1980 if (cmd == ENI_MEMDUMP) {
1981 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1982 printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d "
1983 "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number);
1984 dump(dev);
1985 return 0;
1986 }
1987 if (cmd == ENI_SETMULT) {
1988 struct eni_multipliers mult;
1989
1990 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1991 if (copy_from_user(&mult, arg,
1992 sizeof(struct eni_multipliers)))
1993 return -EFAULT;
1994 if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) ||
1995 mult.tx > 65536 || mult.rx > 65536)
1996 return -EINVAL;
1997 if (mult.tx) eni_dev->tx_mult = mult.tx;
1998 if (mult.rx) eni_dev->rx_mult = mult.rx;
1999 return 0;
2000 }
2001 if (cmd == ATM_SETCIRANGE) {
2002 struct atm_cirange ci;
2003
2004 if (copy_from_user(&ci, arg,sizeof(struct atm_cirange)))
2005 return -EFAULT;
2006 if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) &&
2007 (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX))
2008 return 0;
2009 return -EINVAL;
2010 }
2011 if (!dev->phy->ioctl) return -ENOIOCTLCMD;
2012 return dev->phy->ioctl(dev,cmd,arg);
2013 }
2014
2015
2016 static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname,
2017 void __user *optval,int optlen)
2018 {
2019 return -EINVAL;
2020 }
2021
2022
2023 static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname,
2024 void __user *optval,int optlen)
2025 {
2026 return -EINVAL;
2027 }
2028
2029
2030 static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb)
2031 {
2032 enum enq_res res;
2033
2034 DPRINTK(">eni_send\n");
2035 if (!ENI_VCC(vcc)->tx) {
2036 if (vcc->pop) vcc->pop(vcc,skb);
2037 else dev_kfree_skb(skb);
2038 return -EINVAL;
2039 }
2040 if (!skb) {
2041 printk(KERN_CRIT "!skb in eni_send ?\n");
2042 if (vcc->pop) vcc->pop(vcc,skb);
2043 return -EINVAL;
2044 }
2045 if (vcc->qos.aal == ATM_AAL0) {
2046 if (skb->len != ATM_CELL_SIZE-1) {
2047 if (vcc->pop) vcc->pop(vcc,skb);
2048 else dev_kfree_skb(skb);
2049 return -EINVAL;
2050 }
2051 *(u32 *) skb->data = htonl(*(u32 *) skb->data);
2052 }
2053 submitted++;
2054 ATM_SKB(skb)->vcc = vcc;
2055 tasklet_disable(&ENI_DEV(vcc->dev)->task);
2056 res = do_tx(skb);
2057 tasklet_enable(&ENI_DEV(vcc->dev)->task);
2058 if (res == enq_ok) return 0;
2059 skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb);
2060 backlogged++;
2061 tasklet_schedule(&ENI_DEV(vcc->dev)->task);
2062 return 0;
2063 }
2064
2065 static void eni_phy_put(struct atm_dev *dev,unsigned char value,
2066 unsigned long addr)
2067 {
2068 writel(value,ENI_DEV(dev)->phy+addr*4);
2069 }
2070
2071
2072
2073 static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr)
2074 {
2075 return readl(ENI_DEV(dev)->phy+addr*4);
2076 }
2077
2078
2079 static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page)
2080 {
2081 struct hlist_node *node;
2082 struct sock *s;
2083 static const char *signal[] = { "LOST","unknown","okay" };
2084 struct eni_dev *eni_dev = ENI_DEV(dev);
2085 struct atm_vcc *vcc;
2086 int left,i;
2087
2088 left = *pos;
2089 if (!left)
2090 return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, "
2091 "%d cps remaining\n",dev->number,signal[(int) dev->signal],
2092 eni_dev->mem >> 10,eni_dev->tx_bw);
2093 if (!--left)
2094 return sprintf(page,"%4sBursts: TX"
2095 #if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \
2096 !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \
2097 !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \
2098 !defined(CONFIG_ATM_ENI_BURST_TX_2W)
2099 " none"
2100 #endif
2101 #ifdef CONFIG_ATM_ENI_BURST_TX_16W
2102 " 16W"
2103 #endif
2104 #ifdef CONFIG_ATM_ENI_BURST_TX_8W
2105 " 8W"
2106 #endif
2107 #ifdef CONFIG_ATM_ENI_BURST_TX_4W
2108 " 4W"
2109 #endif
2110 #ifdef CONFIG_ATM_ENI_BURST_TX_2W
2111 " 2W"
2112 #endif
2113 ", RX"
2114 #if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \
2115 !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \
2116 !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \
2117 !defined(CONFIG_ATM_ENI_BURST_RX_2W)
2118 " none"
2119 #endif
2120 #ifdef CONFIG_ATM_ENI_BURST_RX_16W
2121 " 16W"
2122 #endif
2123 #ifdef CONFIG_ATM_ENI_BURST_RX_8W
2124 " 8W"
2125 #endif
2126 #ifdef CONFIG_ATM_ENI_BURST_RX_4W
2127 " 4W"
2128 #endif
2129 #ifdef CONFIG_ATM_ENI_BURST_RX_2W
2130 " 2W"
2131 #endif
2132 #ifndef CONFIG_ATM_ENI_TUNE_BURST
2133 " (default)"
2134 #endif
2135 "\n","");
2136 if (!--left)
2137 return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n",
2138 "",eni_dev->tx_mult,eni_dev->rx_mult);
2139 for (i = 0; i < NR_CHAN; i++) {
2140 struct eni_tx *tx = eni_dev->tx+i;
2141
2142 if (!tx->send) continue;
2143 if (!--left) {
2144 return sprintf(page,"tx[%d]: 0x%ld-0x%ld "
2145 "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i,
2146 (unsigned long) (tx->send - eni_dev->ram),
2147 tx->send-eni_dev->ram+tx->words*4-1,tx->words*4,
2148 tx->reserved,tx->shaping,
2149 tx == eni_dev->ubr ? " (UBR)" : "");
2150 }
2151 if (--left) continue;
2152 return sprintf(page,"%10sbacklog %u packets\n","",
2153 skb_queue_len(&tx->backlog));
2154 }
2155 read_lock(&vcc_sklist_lock);
2156 for(i = 0; i < VCC_HTABLE_SIZE; ++i) {
2157 struct hlist_head *head = &vcc_hash[i];
2158
2159 sk_for_each(s, node, head) {
2160 struct eni_vcc *eni_vcc;
2161 int length;
2162
2163 vcc = atm_sk(s);
2164 if (vcc->dev != dev)
2165 continue;
2166 eni_vcc = ENI_VCC(vcc);
2167 if (--left) continue;
2168 length = sprintf(page,"vcc %4d: ",vcc->vci);
2169 if (eni_vcc->rx) {
2170 length += sprintf(page+length,"0x%ld-0x%ld "
2171 "(%6ld bytes)",
2172 (unsigned long) (eni_vcc->recv - eni_dev->ram),
2173 eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1,
2174 eni_vcc->words*4);
2175 if (eni_vcc->tx) length += sprintf(page+length,", ");
2176 }
2177 if (eni_vcc->tx)
2178 length += sprintf(page+length,"tx[%d], txing %d bytes",
2179 eni_vcc->tx->index,eni_vcc->txing);
2180 page[length] = '\n';
2181 read_unlock(&vcc_sklist_lock);
2182 return length+1;
2183 }
2184 }
2185 read_unlock(&vcc_sklist_lock);
2186 for (i = 0; i < eni_dev->free_len; i++) {
2187 struct eni_free *fe = eni_dev->free_list+i;
2188 unsigned long offset;
2189
2190 if (--left) continue;
2191 offset = (unsigned long) eni_dev->ram+eni_dev->base_diff;
2192 return sprintf(page,"free %p-%p (%6d bytes)\n",
2193 fe->start-offset,fe->start-offset+(1 << fe->order)-1,
2194 1 << fe->order);
2195 }
2196 return 0;
2197 }
2198
2199
2200 static const struct atmdev_ops ops = {
2201 .open = eni_open,
2202 .close = eni_close,
2203 .ioctl = eni_ioctl,
2204 .getsockopt = eni_getsockopt,
2205 .setsockopt = eni_setsockopt,
2206 .send = eni_send,
2207 .phy_put = eni_phy_put,
2208 .phy_get = eni_phy_get,
2209 .change_qos = eni_change_qos,
2210 .proc_read = eni_proc_read
2211 };
2212
2213
2214 static int __devinit eni_init_one(struct pci_dev *pci_dev,
2215 const struct pci_device_id *ent)
2216 {
2217 struct atm_dev *dev;
2218 struct eni_dev *eni_dev;
2219 int error = -ENOMEM;
2220
2221 DPRINTK("eni_init_one\n");
2222
2223 if (pci_enable_device(pci_dev)) {
2224 error = -EIO;
2225 goto out0;
2226 }
2227
2228 eni_dev = (struct eni_dev *) kmalloc(sizeof(struct eni_dev),GFP_KERNEL);
2229 if (!eni_dev) goto out0;
2230 if (!cpu_zeroes) {
2231 cpu_zeroes = pci_alloc_consistent(pci_dev,ENI_ZEROES_SIZE,
2232 &zeroes);
2233 if (!cpu_zeroes) goto out1;
2234 }
2235 dev = atm_dev_register(DEV_LABEL,&ops,-1,NULL);
2236 if (!dev) goto out2;
2237 pci_set_drvdata(pci_dev, dev);
2238 eni_dev->pci_dev = pci_dev;
2239 dev->dev_data = eni_dev;
2240 eni_dev->asic = ent->driver_data;
2241 error = eni_do_init(dev);
2242 if (error) goto out3;
2243 error = eni_start(dev);
2244 if (error) goto out3;
2245 eni_dev->more = eni_boards;
2246 eni_boards = dev;
2247 return 0;
2248 out3:
2249 atm_dev_deregister(dev);
2250 out2:
2251 pci_free_consistent(eni_dev->pci_dev,ENI_ZEROES_SIZE,cpu_zeroes,zeroes);
2252 cpu_zeroes = NULL;
2253 out1:
2254 kfree(eni_dev);
2255 out0:
2256 return error;
2257 }
2258
2259
2260 static struct pci_device_id eni_pci_tbl[] = {
2261 { PCI_VENDOR_ID_EF, PCI_DEVICE_ID_EF_ATM_FPGA, PCI_ANY_ID, PCI_ANY_ID,
2262 0, 0, 0 /* FPGA */ },
2263 { PCI_VENDOR_ID_EF, PCI_DEVICE_ID_EF_ATM_ASIC, PCI_ANY_ID, PCI_ANY_ID,
2264 0, 0, 1 /* ASIC */ },
2265 { 0, }
2266 };
2267 MODULE_DEVICE_TABLE(pci,eni_pci_tbl);
2268
2269
2270 static void __devexit eni_remove_one(struct pci_dev *pci_dev)
2271 {
2272 /* grrr */
2273 }
2274
2275
2276 static struct pci_driver eni_driver = {
2277 .name = DEV_LABEL,
2278 .id_table = eni_pci_tbl,
2279 .probe = eni_init_one,
2280 .remove = __devexit_p(eni_remove_one),
2281 };
2282
2283
2284 static int __init eni_init(void)
2285 {
2286 struct sk_buff *skb; /* dummy for sizeof */
2287
2288 if (sizeof(skb->cb) < sizeof(struct eni_skb_prv)) {
2289 printk(KERN_ERR "eni_detect: skb->cb is too small (%Zd < %Zd)\n",
2290 sizeof(skb->cb),sizeof(struct eni_skb_prv));
2291 return -EIO;
2292 }
2293 if (pci_register_driver(&eni_driver) > 0) return 0;
2294 pci_unregister_driver (&eni_driver);
2295 return -ENODEV;
2296 }
2297
2298
2299 module_init(eni_init);
2300 /* @@@ since exit routine not defined, this module can not be unloaded */
2301
2302 MODULE_LICENSE("GPL");
MOXA 2.6.9 from sdlinux-moxaart.tgz