1/* drivers/atm/eni.c - Efficient Networks ENI155P device driver */
2
3/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
4
5
6#include <linux/module.h>
7#include <linux/kernel.h>
8#include <linux/mm.h>
9#include <linux/pci.h>
10#include <linux/errno.h>
11#include <linux/atm.h>
12#include <linux/atmdev.h>
13#include <linux/sonet.h>
14#include <linux/skbuff.h>
15#include <linux/time.h>
16#include <linux/delay.h>
17#include <linux/uio.h>
18#include <linux/init.h>
19#include <linux/atm_eni.h>
20#include <linux/bitops.h>
21#include <linux/slab.h>
22#include <asm/io.h>
23#include <linux/atomic.h>
24#include <linux/uaccess.h>
25#include <asm/string.h>
26#include <asm/byteorder.h>
27
28#include "tonga.h"
29#include "midway.h"
30#include "suni.h"
31#include "eni.h"
32
33#if !defined(__i386__) && !defined(__x86_64__)
34#ifndef ioremap_nocache
35#define ioremap_nocache(X,Y) ioremap(X,Y)
36#endif
37#endif
38
39/*
40 * TODO:
41 *
42 * Show stoppers
43 * none
44 *
45 * Minor
46 * - OAM support
47 * - fix bugs listed below
48 */
49
50/*
51 * KNOWN BUGS:
52 *
53 * - may run into JK-JK bug and deadlock
54 * - should allocate UBR channel first
55 * - buffer space allocation algorithm is stupid
56 * (RX: should be maxSDU+maxdelay*rate
57 * TX: should be maxSDU+min(maxSDU,maxdelay*rate) )
58 * - doesn't support OAM cells
59 * - eni_put_free may hang if not putting memory fragments that _complete_
60 * 2^n block (never happens in real life, though)
61 */
62
63
64#if 0
65#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
66#else
67#define DPRINTK(format,args...)
68#endif
69
70
71#ifndef CONFIG_ATM_ENI_TUNE_BURST
72#define CONFIG_ATM_ENI_BURST_TX_8W
73#define CONFIG_ATM_ENI_BURST_RX_4W
74#endif
75
76
77#ifndef CONFIG_ATM_ENI_DEBUG
78
79
80#define NULLCHECK(x)
81
82#define EVENT(s,a,b)
83
84
85static void event_dump(void)
86{
87}
88
89
90#else
91
92
93/*
94 * NULL pointer checking
95 */
96
97#define NULLCHECK(x) \
98 if ((unsigned long) (x) < 0x30) \
99 printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x))
100
101/*
102 * Very extensive activity logging. Greatly improves bug detection speed but
103 * costs a few Mbps if enabled.
104 */
105
106#define EV 64
107
108static const char *ev[EV];
109static unsigned long ev_a[EV],ev_b[EV];
110static int ec = 0;
111
112
113static void EVENT(const char *s,unsigned long a,unsigned long b)
114{
115 ev[ec] = s;
116 ev_a[ec] = a;
117 ev_b[ec] = b;
118 ec = (ec+1) % EV;
119}
120
121
122static void event_dump(void)
123{
124 int n,i;
125
126 for (n = 0; n < EV; n++) {
127 i = (ec+n) % EV;
128 printk(KERN_NOTICE);
129 printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]);
130 }
131}
132
133
134#endif /* CONFIG_ATM_ENI_DEBUG */
135
136
137/*
138 * NExx must not be equal at end
139 * EExx may be equal at end
140 * xxPJOK verify validity of pointer jumps
141 * xxPMOK operating on a circular buffer of "c" words
142 */
143
144#define NEPJOK(a0,a1,b) \
145 ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1))
146#define EEPJOK(a0,a1,b) \
147 ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1))
148#define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b)
149#define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b)
150
151
152static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0,
153 backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0,
154 putting = 0;
155
156static struct atm_dev *eni_boards = NULL;
157
158/* Read/write registers on card */
159#define eni_in(r) readl(eni_dev->reg+(r)*4)
160#define eni_out(v,r) writel((v),eni_dev->reg+(r)*4)
161
162
163/*-------------------------------- utilities --------------------------------*/
164
165
166static void dump_mem(struct eni_dev *eni_dev)
167{
168 int i;
169
170 for (i = 0; i < eni_dev->free_len; i++)
171 printk(KERN_DEBUG " %d: %p %d\n",i,
172 eni_dev->free_list[i].start,
173 1 << eni_dev->free_list[i].order);
174}
175
176
177static void dump(struct atm_dev *dev)
178{
179 struct eni_dev *eni_dev;
180
181 int i;
182
183 eni_dev = ENI_DEV(dev);
184 printk(KERN_NOTICE "Free memory\n");
185 dump_mem(eni_dev);
186 printk(KERN_NOTICE "TX buffers\n");
187 for (i = 0; i < NR_CHAN; i++)
188 if (eni_dev->tx[i].send)
189 printk(KERN_NOTICE " TX %d @ %p: %ld\n",i,
190 eni_dev->tx[i].send,eni_dev->tx[i].words*4);
191 printk(KERN_NOTICE "RX buffers\n");
192 for (i = 0; i < 1024; i++)
193 if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx)
194 printk(KERN_NOTICE " RX %d @ %p: %ld\n",i,
195 ENI_VCC(eni_dev->rx_map[i])->recv,
196 ENI_VCC(eni_dev->rx_map[i])->words*4);
197 printk(KERN_NOTICE "----\n");
198}
199
200
201static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start,
202 unsigned long size)
203{
204 struct eni_free *list;
205 int len,order;
206
207 DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size);
208 start += eni_dev->base_diff;
209 list = eni_dev->free_list;
210 len = eni_dev->free_len;
211 while (size) {
212 if (len >= eni_dev->free_list_size) {
213 printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n",
214 start,size);
215 break;
216 }
217 for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++);
218 if (MID_MIN_BUF_SIZE > (1 << order)) {
219 printk(KERN_CRIT "eni_put_free: order %d too small\n",
220 order);
221 break;
222 }
223 list[len].start = (void __iomem *) start;
224 list[len].order = order;
225 len++;
226 start += 1 << order;
227 size -= 1 << order;
228 }
229 eni_dev->free_len = len;
230 /*dump_mem(eni_dev);*/
231}
232
233
234static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size)
235{
236 struct eni_free *list;
237 void __iomem *start;
238 int len,i,order,best_order,index;
239
240 list = eni_dev->free_list;
241 len = eni_dev->free_len;
242 if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE;
243 if (*size > MID_MAX_BUF_SIZE) return NULL;
244 for (order = 0; (1 << order) < *size; order++)
245 ;
246 DPRINTK("trying: %ld->%d\n",*size,order);
247 best_order = 65; /* we don't have more than 2^64 of anything ... */
248 index = 0; /* silence GCC */
249 for (i = 0; i < len; i++)
250 if (list[i].order == order) {
251 best_order = order;
252 index = i;
253 break;
254 }
255 else if (best_order > list[i].order && list[i].order > order) {
256 best_order = list[i].order;
257 index = i;
258 }
259 if (best_order == 65) return NULL;
260 start = list[index].start-eni_dev->base_diff;
261 list[index] = list[--len];
262 eni_dev->free_len = len;
263 *size = 1 << order;
264 eni_put_free(eni_dev,start+*size,(1 << best_order)-*size);
265 DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start);
266 memset_io(start,0,*size); /* never leak data */
267 /*dump_mem(eni_dev);*/
268 return start;
269}
270
271
272static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start,
273 unsigned long size)
274{
275 struct eni_free *list;
276 int len,i,order;
277
278 start += eni_dev->base_diff;
279 list = eni_dev->free_list;
280 len = eni_dev->free_len;
281 for (order = -1; size; order++) size >>= 1;
282 DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order);
283 for (i = 0; i < len; i++)
284 if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) &&
285 list[i].order == order) {
286 DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i,
287 list[i].start,start,1 << order,list[i].order,order);
288 list[i] = list[--len];
289 start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order));
290 order++;
291 i = -1;
292 continue;
293 }
294 if (len >= eni_dev->free_list_size) {
295 printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start,
296 order);
297 return;
298 }
299 list[len].start = start;
300 list[len].order = order;
301 eni_dev->free_len = len+1;
302 /*dump_mem(eni_dev);*/
303}
304
305
306/*----------------------------------- RX ------------------------------------*/
307
308
309#define ENI_VCC_NOS ((struct atm_vcc *) 1)
310
311
312static void rx_ident_err(struct atm_vcc *vcc)
313{
314 struct atm_dev *dev;
315 struct eni_dev *eni_dev;
316 struct eni_vcc *eni_vcc;
317
318 dev = vcc->dev;
319 eni_dev = ENI_DEV(dev);
320 /* immediately halt adapter */
321 eni_out(eni_in(MID_MC_S) &
322 ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S);
323 /* dump useful information */
324 eni_vcc = ENI_VCC(vcc);
325 printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident "
326 "mismatch\n",dev->number);
327 printk(KERN_ALERT " VCI %d, rxing %d, words %ld\n",vcc->vci,
328 eni_vcc->rxing,eni_vcc->words);
329 printk(KERN_ALERT " host descr 0x%lx, rx pos 0x%lx, descr value "
330 "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos,
331 (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4));
332 printk(KERN_ALERT " last %p, servicing %d\n",eni_vcc->last,
333 eni_vcc->servicing);
334 EVENT("---dump ends here---\n",0,0);
335 printk(KERN_NOTICE "---recent events---\n");
336 event_dump();
337 ENI_DEV(dev)->fast = NULL; /* really stop it */
338 ENI_DEV(dev)->slow = NULL;
339 skb_queue_head_init(&ENI_DEV(dev)->rx_queue);
340}
341
342
343static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb,
344 unsigned long skip,unsigned long size,unsigned long eff)
345{
346 struct eni_dev *eni_dev;
347 struct eni_vcc *eni_vcc;
348 u32 dma_rd,dma_wr;
349 u32 dma[RX_DMA_BUF*2];
350 dma_addr_t paddr;
351 unsigned long here;
352 int i,j;
353
354 eni_dev = ENI_DEV(vcc->dev);
355 eni_vcc = ENI_VCC(vcc);
356 paddr = 0; /* GCC, shut up */
357 if (skb) {
358 paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len,
359 DMA_FROM_DEVICE);
360 if (dma_mapping_error(&eni_dev->pci_dev->dev, paddr))
361 goto dma_map_error;
362 ENI_PRV_PADDR(skb) = paddr;
363 if (paddr & 3)
364 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has "
365 "mis-aligned RX data (0x%lx)\n",vcc->dev->number,
366 vcc->vci,(unsigned long) paddr);
367 ENI_PRV_SIZE(skb) = size+skip;
368 /* PDU plus descriptor */
369 ATM_SKB(skb)->vcc = vcc;
370 }
371 j = 0;
372 if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */
373 here = (eni_vcc->descr+skip) & (eni_vcc->words-1);
374 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci
375 << MID_DMA_VCI_SHIFT) | MID_DT_JK;
376 j++;
377 }
378 here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1);
379 if (!eff) size += skip;
380 else {
381 unsigned long words;
382
383 if (!size) {
384 DPRINTK("strange things happen ...\n");
385 EVENT("strange things happen ... (skip=%ld,eff=%ld)\n",
386 size,eff);
387 }
388 words = eff;
389 if (paddr & 15) {
390 unsigned long init;
391
392 init = 4-((paddr & 15) >> 2);
393 if (init > words) init = words;
394 dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
395 (vcc->vci << MID_DMA_VCI_SHIFT);
396 dma[j++] = paddr;
397 paddr += init << 2;
398 words -= init;
399 }
400#ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */
401 if (words & ~15) {
402 dma[j++] = MID_DT_16W | ((words >> 4) <<
403 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
404 MID_DMA_VCI_SHIFT);
405 dma[j++] = paddr;
406 paddr += (words & ~15) << 2;
407 words &= 15;
408 }
409#endif
410#ifdef CONFIG_ATM_ENI_BURST_RX_8W /* works only with *some* PCI chipsets ... */
411 if (words & ~7) {
412 dma[j++] = MID_DT_8W | ((words >> 3) <<
413 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
414 MID_DMA_VCI_SHIFT);
415 dma[j++] = paddr;
416 paddr += (words & ~7) << 2;
417 words &= 7;
418 }
419#endif
420#ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */
421 if (words & ~3) {
422 dma[j++] = MID_DT_4W | ((words >> 2) <<
423 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
424 MID_DMA_VCI_SHIFT);
425 dma[j++] = paddr;
426 paddr += (words & ~3) << 2;
427 words &= 3;
428 }
429#endif
430#ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */
431 if (words & ~1) {
432 dma[j++] = MID_DT_2W | ((words >> 1) <<
433 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
434 MID_DMA_VCI_SHIFT);
435 dma[j++] = paddr;
436 paddr += (words & ~1) << 2;
437 words &= 1;
438 }
439#endif
440 if (words) {
441 dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT)
442 | (vcc->vci << MID_DMA_VCI_SHIFT);
443 dma[j++] = paddr;
444 }
445 }
446 if (size != eff) {
447 dma[j++] = (here << MID_DMA_COUNT_SHIFT) |
448 (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK;
449 j++;
450 }
451 if (!j || j > 2*RX_DMA_BUF) {
452 printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n");
453 goto trouble;
454 }
455 dma[j-2] |= MID_DMA_END;
456 j = j >> 1;
457 dma_wr = eni_in(MID_DMA_WR_RX);
458 dma_rd = eni_in(MID_DMA_RD_RX);
459 /*
460 * Can I move the dma_wr pointer by 2j+1 positions without overwriting
461 * data that hasn't been read (position of dma_rd) yet ?
462 */
463 if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */
464 printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n",
465 vcc->dev->number);
466 goto trouble;
467 }
468 for (i = 0; i < j; i++) {
469 writel(dma[i*2],eni_dev->rx_dma+dma_wr*8);
470 writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4);
471 dma_wr = (dma_wr+1) & (NR_DMA_RX-1);
472 }
473 if (skb) {
474 ENI_PRV_POS(skb) = eni_vcc->descr+size+1;
475 skb_queue_tail(&eni_dev->rx_queue,skb);
476 eni_vcc->last = skb;
477 rx_enqueued++;
478 }
479 eni_vcc->descr = here;
480 eni_out(dma_wr,MID_DMA_WR_RX);
481 return 0;
482
483trouble:
484 if (paddr)
485 dma_unmap_single(&eni_dev->pci_dev->dev,paddr,skb->len,
486 DMA_FROM_DEVICE);
487dma_map_error:
488 if (skb) dev_kfree_skb_irq(skb);
489 return -1;
490}
491
492
493static void discard(struct atm_vcc *vcc,unsigned long size)
494{
495 struct eni_vcc *eni_vcc;
496
497 eni_vcc = ENI_VCC(vcc);
498 EVENT("discard (size=%ld)\n",size,0);
499 while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0);
500 /* could do a full fallback, but that might be more expensive */
501 if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1;
502 else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1);
503}
504
505
506/*
507 * TODO: should check whether direct copies (without DMA setup, dequeuing on
508 * interrupt, etc.) aren't much faster for AAL0
509 */
510
511static int rx_aal0(struct atm_vcc *vcc)
512{
513 struct eni_vcc *eni_vcc;
514 unsigned long descr;
515 unsigned long length;
516 struct sk_buff *skb;
517
518 DPRINTK(">rx_aal0\n");
519 eni_vcc = ENI_VCC(vcc);
520 descr = readl(eni_vcc->recv+eni_vcc->descr*4);
521 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
522 rx_ident_err(vcc);
523 return 1;
524 }
525 if (descr & MID_RED_T) {
526 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
527 vcc->dev->number);
528 length = 0;
529 atomic_inc(&vcc->stats->rx_err);
530 }
531 else {
532 length = ATM_CELL_SIZE-1; /* no HEC */
533 }
534 skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL;
535 if (!skb) {
536 discard(vcc,length >> 2);
537 return 0;
538 }
539 skb_put(skb,length);
540 skb->tstamp = eni_vcc->timestamp;
541 DPRINTK("got len %ld\n",length);
542 if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1;
543 eni_vcc->rxing++;
544 return 0;
545}
546
547
548static int rx_aal5(struct atm_vcc *vcc)
549{
550 struct eni_vcc *eni_vcc;
551 unsigned long descr;
552 unsigned long size,eff,length;
553 struct sk_buff *skb;
554
555 EVENT("rx_aal5\n",0,0);
556 DPRINTK(">rx_aal5\n");
557 eni_vcc = ENI_VCC(vcc);
558 descr = readl(eni_vcc->recv+eni_vcc->descr*4);
559 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
560 rx_ident_err(vcc);
561 return 1;
562 }
563 if (descr & (MID_RED_T | MID_RED_CRC_ERR)) {
564 if (descr & MID_RED_T) {
565 EVENT("empty cell (descr=0x%lx)\n",descr,0);
566 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
567 vcc->dev->number);
568 size = 0;
569 }
570 else {
571 static unsigned long silence = 0;
572
573 if (time_after(jiffies, silence) || silence == 0) {
574 printk(KERN_WARNING DEV_LABEL "(itf %d): "
575 "discarding PDU(s) with CRC error\n",
576 vcc->dev->number);
577 silence = (jiffies+2*HZ)|1;
578 }
579 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
580 EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr,
581 size);
582 }
583 eff = length = 0;
584 atomic_inc(&vcc->stats->rx_err);
585 }
586 else {
587 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
588 DPRINTK("size=%ld\n",size);
589 length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) &
590 (eni_vcc->words-1)))*4) & 0xffff;
591 /* -trailer(2)+header(1) */
592 if (length && length <= (size << 2)-8 && length <=
593 ATM_MAX_AAL5_PDU) eff = (length+3) >> 2;
594 else { /* ^ trailer length (8) */
595 EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr,
596 length);
597 printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU "
598 "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n",
599 vcc->dev->number,vcc->vci,length,size << 2,descr);
600 length = eff = 0;
601 atomic_inc(&vcc->stats->rx_err);
602 }
603 }
604 skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL;
605 if (!skb) {
606 discard(vcc,size);
607 return 0;
608 }
609 skb_put(skb,length);
610 DPRINTK("got len %ld\n",length);
611 if (do_rx_dma(vcc,skb,1,size,eff)) return 1;
612 eni_vcc->rxing++;
613 return 0;
614}
615
616
617static inline int rx_vcc(struct atm_vcc *vcc)
618{
619 void __iomem *vci_dsc;
620 unsigned long tmp;
621 struct eni_vcc *eni_vcc;
622
623 eni_vcc = ENI_VCC(vcc);
624 vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16;
625 EVENT("rx_vcc(1)\n",0,0);
626 while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >>
627 MID_VCI_DESCR_SHIFT)) {
628 EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n",
629 eni_vcc->descr,tmp);
630 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
631 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
632 MID_VCI_DESCR_SHIFT));
633 if (ENI_VCC(vcc)->rx(vcc)) return 1;
634 }
635 /* clear IN_SERVICE flag */
636 writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc);
637 /*
638 * If new data has arrived between evaluating the while condition and
639 * clearing IN_SERVICE, we wouldn't be notified until additional data
640 * follows. So we have to loop again to be sure.
641 */
642 EVENT("rx_vcc(3)\n",0,0);
643 while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR)
644 >> MID_VCI_DESCR_SHIFT)) {
645 EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n",
646 eni_vcc->descr,tmp);
647 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
648 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
649 MID_VCI_DESCR_SHIFT));
650 if (ENI_VCC(vcc)->rx(vcc)) return 1;
651 }
652 return 0;
653}
654
655
656static void poll_rx(struct atm_dev *dev)
657{
658 struct eni_dev *eni_dev;
659 struct atm_vcc *curr;
660
661 eni_dev = ENI_DEV(dev);
662 while ((curr = eni_dev->fast)) {
663 EVENT("poll_rx.fast\n",0,0);
664 if (rx_vcc(curr)) return;
665 eni_dev->fast = ENI_VCC(curr)->next;
666 ENI_VCC(curr)->next = ENI_VCC_NOS;
667 barrier();
668 ENI_VCC(curr)->servicing--;
669 }
670 while ((curr = eni_dev->slow)) {
671 EVENT("poll_rx.slow\n",0,0);
672 if (rx_vcc(curr)) return;
673 eni_dev->slow = ENI_VCC(curr)->next;
674 ENI_VCC(curr)->next = ENI_VCC_NOS;
675 barrier();
676 ENI_VCC(curr)->servicing--;
677 }
678}
679
680
681static void get_service(struct atm_dev *dev)
682{
683 struct eni_dev *eni_dev;
684 struct atm_vcc *vcc;
685 unsigned long vci;
686
687 DPRINTK(">get_service\n");
688 eni_dev = ENI_DEV(dev);
689 while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) {
690 vci = readl(eni_dev->service+eni_dev->serv_read*4);
691 eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1);
692 vcc = eni_dev->rx_map[vci & 1023];
693 if (!vcc) {
694 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not "
695 "found\n",dev->number,vci);
696 continue; /* nasty but we try to go on anyway */
697 /* @@@ nope, doesn't work */
698 }
699 EVENT("getting from service\n",0,0);
700 if (ENI_VCC(vcc)->next != ENI_VCC_NOS) {
701 EVENT("double service\n",0,0);
702 DPRINTK("Grr, servicing VCC %ld twice\n",vci);
703 continue;
704 }
705 ENI_VCC(vcc)->timestamp = ktime_get_real();
706 ENI_VCC(vcc)->next = NULL;
707 if (vcc->qos.rxtp.traffic_class == ATM_CBR) {
708 if (eni_dev->fast)
709 ENI_VCC(eni_dev->last_fast)->next = vcc;
710 else eni_dev->fast = vcc;
711 eni_dev->last_fast = vcc;
712 }
713 else {
714 if (eni_dev->slow)
715 ENI_VCC(eni_dev->last_slow)->next = vcc;
716 else eni_dev->slow = vcc;
717 eni_dev->last_slow = vcc;
718 }
719 putting++;
720 ENI_VCC(vcc)->servicing++;
721 }
722}
723
724
725static void dequeue_rx(struct atm_dev *dev)
726{
727 struct eni_dev *eni_dev;
728 struct eni_vcc *eni_vcc;
729 struct atm_vcc *vcc;
730 struct sk_buff *skb;
731 void __iomem *vci_dsc;
732 int first;
733
734 eni_dev = ENI_DEV(dev);
735 first = 1;
736 while (1) {
737 skb = skb_dequeue(&eni_dev->rx_queue);
738 if (!skb) {
739 if (first) {
740 DPRINTK(DEV_LABEL "(itf %d): RX but not "
741 "rxing\n",dev->number);
742 EVENT("nothing to dequeue\n",0,0);
743 }
744 break;
745 }
746 EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb),
747 ENI_PRV_POS(skb));
748 rx_dequeued++;
749 vcc = ATM_SKB(skb)->vcc;
750 eni_vcc = ENI_VCC(vcc);
751 first = 0;
752 vci_dsc = eni_dev->vci+vcc->vci*16;
753 if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb),
754 (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT,
755 eni_vcc->words)) {
756 EVENT("requeuing\n",0,0);
757 skb_queue_head(&eni_dev->rx_queue,skb);
758 break;
759 }
760 eni_vcc->rxing--;
761 eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1);
762 dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len,
763 DMA_TO_DEVICE);
764 if (!skb->len) dev_kfree_skb_irq(skb);
765 else {
766 EVENT("pushing (len=%ld)\n",skb->len,0);
767 if (vcc->qos.aal == ATM_AAL0)
768 *(unsigned long *) skb->data =
769 ntohl(*(unsigned long *) skb->data);
770 memset(skb->cb,0,sizeof(struct eni_skb_prv));
771 vcc->push(vcc,skb);
772 pushed++;
773 }
774 atomic_inc(&vcc->stats->rx);
775 }
776 wake_up(&eni_dev->rx_wait);
777}
778
779
780static int open_rx_first(struct atm_vcc *vcc)
781{
782 struct eni_dev *eni_dev;
783 struct eni_vcc *eni_vcc;
784 unsigned long size;
785
786 DPRINTK("open_rx_first\n");
787 eni_dev = ENI_DEV(vcc->dev);
788 eni_vcc = ENI_VCC(vcc);
789 eni_vcc->rx = NULL;
790 if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0;
791 size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100;
792 if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <=
793 MID_MAX_BUF_SIZE)
794 size = MID_MAX_BUF_SIZE;
795 eni_vcc->recv = eni_alloc_mem(eni_dev,&size);
796 DPRINTK("rx at 0x%lx\n",eni_vcc->recv);
797 eni_vcc->words = size >> 2;
798 if (!eni_vcc->recv) return -ENOBUFS;
799 eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0;
800 eni_vcc->descr = 0;
801 eni_vcc->rx_pos = 0;
802 eni_vcc->rxing = 0;
803 eni_vcc->servicing = 0;
804 eni_vcc->next = ENI_VCC_NOS;
805 return 0;
806}
807
808
809static int open_rx_second(struct atm_vcc *vcc)
810{
811 void __iomem *here;
812 struct eni_dev *eni_dev;
813 struct eni_vcc *eni_vcc;
814 unsigned long size;
815 int order;
816
817 DPRINTK("open_rx_second\n");
818 eni_dev = ENI_DEV(vcc->dev);
819 eni_vcc = ENI_VCC(vcc);
820 if (!eni_vcc->rx) return 0;
821 /* set up VCI descriptor */
822 here = eni_dev->vci+vcc->vci*16;
823 DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4);
824 size = eni_vcc->words >> 8;
825 for (order = -1; size; order++) size >>= 1;
826 writel(0,here+4); /* descr, read = 0 */
827 writel(0,here+8); /* write, state, count = 0 */
828 if (eni_dev->rx_map[vcc->vci])
829 printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already "
830 "in use\n",vcc->dev->number,vcc->vci);
831 eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */
832 writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) <<
833 MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE |
834 (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) <<
835 MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here);
836 return 0;
837}
838
839
840static void close_rx(struct atm_vcc *vcc)
841{
842 DECLARE_WAITQUEUE(wait,current);
843 void __iomem *here;
844 struct eni_dev *eni_dev;
845 struct eni_vcc *eni_vcc;
846
847 eni_vcc = ENI_VCC(vcc);
848 if (!eni_vcc->rx) return;
849 eni_dev = ENI_DEV(vcc->dev);
850 if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) {
851 here = eni_dev->vci+vcc->vci*16;
852 /* block receiver */
853 writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH <<
854 MID_VCI_MODE_SHIFT),here);
855 /* wait for receiver to become idle */
856 udelay(27);
857 /* discard pending cell */
858 writel(readl(here) & ~MID_VCI_IN_SERVICE,here);
859 /* don't accept any new ones */
860 eni_dev->rx_map[vcc->vci] = NULL;
861 /* wait for RX queue to drain */
862 DPRINTK("eni_close: waiting for RX ...\n");
863 EVENT("RX closing\n",0,0);
864 add_wait_queue(&eni_dev->rx_wait,&wait);
865 set_current_state(TASK_UNINTERRUPTIBLE);
866 barrier();
867 for (;;) {
868 /* transition service->rx: rxing++, servicing-- */
869 if (!eni_vcc->servicing) {
870 barrier();
871 if (!eni_vcc->rxing) break;
872 }
873 EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing,
874 eni_vcc->servicing);
875 printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing,
876 eni_vcc->rxing);
877 schedule();
878 set_current_state(TASK_UNINTERRUPTIBLE);
879 }
880 for (;;) {
881 int at_end;
882 u32 tmp;
883
884 tasklet_disable(&eni_dev->task);
885 tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ;
886 at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT;
887 tasklet_enable(&eni_dev->task);
888 if (at_end) break;
889 EVENT("drain discard (host 0x%lx, nic 0x%lx)\n",
890 eni_vcc->rx_pos,tmp);
891 printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n",
892 eni_vcc->rx_pos,tmp);
893 schedule();
894 set_current_state(TASK_UNINTERRUPTIBLE);
895 }
896 set_current_state(TASK_RUNNING);
897 remove_wait_queue(&eni_dev->rx_wait,&wait);
898 }
899 eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2);
900 eni_vcc->rx = NULL;
901}
902
903
904static int start_rx(struct atm_dev *dev)
905{
906 struct eni_dev *eni_dev;
907
908 eni_dev = ENI_DEV(dev);
909 eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL);
910 if (!eni_dev->rx_map) {
911 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
912 dev->number);
913 free_page((unsigned long) eni_dev->free_list);
914 return -ENOMEM;
915 }
916 eni_dev->rx_mult = DEFAULT_RX_MULT;
917 eni_dev->fast = eni_dev->last_fast = NULL;
918 eni_dev->slow = eni_dev->last_slow = NULL;
919 init_waitqueue_head(&eni_dev->rx_wait);
920 skb_queue_head_init(&eni_dev->rx_queue);
921 eni_dev->serv_read = eni_in(MID_SERV_WRITE);
922 eni_out(0,MID_DMA_WR_RX);
923 return 0;
924}
925
926
927/*----------------------------------- TX ------------------------------------*/
928
929
930enum enq_res { enq_ok,enq_next,enq_jam };
931
932
933static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr,
934 u32 size)
935{
936 u32 init,words;
937
938 DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size);
939 EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size);
940#if 0 /* don't complain anymore */
941 if (paddr & 3)
942 printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr);
943 if (size & 3)
944 printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size);
945#endif
946 if (paddr & 3) {
947 init = 4-(paddr & 3);
948 if (init > size || size < 7) init = size;
949 DPRINTK("put_dma: %lx DMA: %d/%d bytes\n",
950 (unsigned long) paddr,init,size);
951 dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) |
952 (chan << MID_DMA_CHAN_SHIFT);
953 dma[(*j)++] = paddr;
954 paddr += init;
955 size -= init;
956 }
957 words = size >> 2;
958 size &= 3;
959 if (words && (paddr & 31)) {
960 init = 8-((paddr & 31) >> 2);
961 if (init > words) init = words;
962 DPRINTK("put_dma: %lx DMA: %d/%d words\n",
963 (unsigned long) paddr,init,words);
964 dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
965 (chan << MID_DMA_CHAN_SHIFT);
966 dma[(*j)++] = paddr;
967 paddr += init << 2;
968 words -= init;
969 }
970#ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */
971 if (words & ~15) {
972 DPRINTK("put_dma: %lx DMA: %d*16/%d words\n",
973 (unsigned long) paddr,words >> 4,words);
974 dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT)
975 | (chan << MID_DMA_CHAN_SHIFT);
976 dma[(*j)++] = paddr;
977 paddr += (words & ~15) << 2;
978 words &= 15;
979 }
980#endif
981#ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */
982 if (words & ~7) {
983 DPRINTK("put_dma: %lx DMA: %d*8/%d words\n",
984 (unsigned long) paddr,words >> 3,words);
985 dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT)
986 | (chan << MID_DMA_CHAN_SHIFT);
987 dma[(*j)++] = paddr;
988 paddr += (words & ~7) << 2;
989 words &= 7;
990 }
991#endif
992#ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */
993 if (words & ~3) {
994 DPRINTK("put_dma: %lx DMA: %d*4/%d words\n",
995 (unsigned long) paddr,words >> 2,words);
996 dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT)
997 | (chan << MID_DMA_CHAN_SHIFT);
998 dma[(*j)++] = paddr;
999 paddr += (words & ~3) << 2;
1000 words &= 3;
1001 }
1002#endif
1003#ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */
1004 if (words & ~1) {
1005 DPRINTK("put_dma: %lx DMA: %d*2/%d words\n",
1006 (unsigned long) paddr,words >> 1,words);
1007 dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT)
1008 | (chan << MID_DMA_CHAN_SHIFT);
1009 dma[(*j)++] = paddr;
1010 paddr += (words & ~1) << 2;
1011 words &= 1;
1012 }
1013#endif
1014 if (words) {
1015 DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr,
1016 words);
1017 dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) |
1018 (chan << MID_DMA_CHAN_SHIFT);
1019 dma[(*j)++] = paddr;
1020 paddr += words << 2;
1021 }
1022 if (size) {
1023 DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr,
1024 size);
1025 dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) |
1026 (chan << MID_DMA_CHAN_SHIFT);
1027 dma[(*j)++] = paddr;
1028 }
1029}
1030
1031
1032static enum enq_res do_tx(struct sk_buff *skb)
1033{
1034 struct atm_vcc *vcc;
1035 struct eni_dev *eni_dev;
1036 struct eni_vcc *eni_vcc;
1037 struct eni_tx *tx;
1038 dma_addr_t paddr;
1039 u32 dma_rd,dma_wr;
1040 u32 size; /* in words */
1041 int aal5,dma_size,i,j;
1042
1043 DPRINTK(">do_tx\n");
1044 NULLCHECK(skb);
1045 EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len);
1046 vcc = ATM_SKB(skb)->vcc;
1047 NULLCHECK(vcc);
1048 eni_dev = ENI_DEV(vcc->dev);
1049 NULLCHECK(eni_dev);
1050 eni_vcc = ENI_VCC(vcc);
1051 tx = eni_vcc->tx;
1052 NULLCHECK(tx);
1053#if 0 /* Enable this for testing with the "align" program */
1054 {
1055 unsigned int hack = *((char *) skb->data)-'0';
1056
1057 if (hack < 8) {
1058 skb->data += hack;
1059 skb->len -= hack;
1060 }
1061 }
1062#endif
1063#if 0 /* should work now */
1064 if ((unsigned long) skb->data & 3)
1065 printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned "
1066 "TX data\n",vcc->dev->number,vcc->vci);
1067#endif
1068 /*
1069 * Potential future IP speedup: make hard_header big enough to put
1070 * segmentation descriptor directly into PDU. Saves: 4 slave writes,
1071 * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-)
1072 */
1073
1074 aal5 = vcc->qos.aal == ATM_AAL5;
1075 /* check space in buffer */
1076 if (!aal5)
1077 size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE;
1078 /* cell without HEC plus segmentation header (includes
1079 four-byte cell header) */
1080 else {
1081 size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1;
1082 /* add AAL5 trailer */
1083 size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE;
1084 /* add segmentation header */
1085 }
1086 /*
1087 * Can I move tx_pos by size bytes without getting closer than TX_GAP
1088 * to the read pointer ? TX_GAP means to leave some space for what
1089 * the manual calls "too close".
1090 */
1091 if (!NEPMOK(tx->tx_pos,size+TX_GAP,
1092 eni_in(MID_TX_RDPTR(tx->index)),tx->words)) {
1093 DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n",
1094 vcc->dev->number,size);
1095 return enq_next;
1096 }
1097 /* check DMA */
1098 dma_wr = eni_in(MID_DMA_WR_TX);
1099 dma_rd = eni_in(MID_DMA_RD_TX);
1100 dma_size = 3; /* JK for descriptor and final fill, plus final size
1101 mis-alignment fix */
1102DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags);
1103 if (!skb_shinfo(skb)->nr_frags) dma_size += 5;
1104 else dma_size += 5*(skb_shinfo(skb)->nr_frags+1);
1105 if (dma_size > TX_DMA_BUF) {
1106 printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries "
1107 "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF);
1108 }
1109 DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos);
1110 if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) <
1111 dma_size) {
1112 printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n",
1113 vcc->dev->number);
1114 return enq_jam;
1115 }
1116 paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len,
1117 DMA_TO_DEVICE);
1118 ENI_PRV_PADDR(skb) = paddr;
1119 /* prepare DMA queue entries */
1120 j = 0;
1121 eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) <<
1122 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1123 MID_DT_JK;
1124 j++;
1125 if (!skb_shinfo(skb)->nr_frags)
1126 if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len);
1127 else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4);
1128 else {
1129DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */
1130 for (i = -1; i < skb_shinfo(skb)->nr_frags; i++)
1131 if (i == -1)
1132 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1133 skb->data,
1134 skb_headlen(skb));
1135 else
1136 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1137 skb_frag_page(&skb_shinfo(skb)->frags[i]) +
1138 skb_shinfo(skb)->frags[i].page_offset,
1139 skb_frag_size(&skb_shinfo(skb)->frags[i]));
1140 }
1141 if (skb->len & 3) {
1142 put_dma(tx->index, eni_dev->dma, &j, eni_dev->zero.dma,
1143 4 - (skb->len & 3));
1144 }
1145 /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */
1146 eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) <<
1147 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1148 MID_DMA_END | MID_DT_JK;
1149 j++;
1150 DPRINTK("DMA at end: %d\n",j);
1151 /* store frame */
1152 writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) |
1153 (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) |
1154 (tx->resolution << MID_SEG_RATE_SHIFT) |
1155 (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4);
1156/*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/
1157 writel((vcc->vci << MID_SEG_VCI_SHIFT) |
1158 (aal5 ? 0 : (skb->data[3] & 0xf)) |
1159 (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0),
1160 tx->send+((tx->tx_pos+1) & (tx->words-1))*4);
1161 DPRINTK("size: %d, len:%d\n",size,skb->len);
1162 if (aal5)
1163 writel(skb->len,tx->send+
1164 ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4);
1165 j = j >> 1;
1166 for (i = 0; i < j; i++) {
1167 writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8);
1168 writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4);
1169 dma_wr = (dma_wr+1) & (NR_DMA_TX-1);
1170 }
1171 ENI_PRV_POS(skb) = tx->tx_pos;
1172 ENI_PRV_SIZE(skb) = size;
1173 ENI_VCC(vcc)->txing += size;
1174 tx->tx_pos = (tx->tx_pos+size) & (tx->words-1);
1175 DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos);
1176 eni_out(dma_wr,MID_DMA_WR_TX);
1177 skb_queue_tail(&eni_dev->tx_queue,skb);
1178 queued++;
1179 return enq_ok;
1180}
1181
1182
1183static void poll_tx(struct atm_dev *dev)
1184{
1185 struct eni_tx *tx;
1186 struct sk_buff *skb;
1187 enum enq_res res;
1188 int i;
1189
1190 DPRINTK(">poll_tx\n");
1191 for (i = NR_CHAN-1; i >= 0; i--) {
1192 tx = &ENI_DEV(dev)->tx[i];
1193 if (tx->send)
1194 while ((skb = skb_dequeue(&tx->backlog))) {
1195 res = do_tx(skb);
1196 if (res == enq_ok) continue;
1197 DPRINTK("re-queuing TX PDU\n");
1198 skb_queue_head(&tx->backlog,skb);
1199 requeued++;
1200 if (res == enq_jam) return;
1201 break;
1202 }
1203 }
1204}
1205
1206
1207static void dequeue_tx(struct atm_dev *dev)
1208{
1209 struct eni_dev *eni_dev;
1210 struct atm_vcc *vcc;
1211 struct sk_buff *skb;
1212 struct eni_tx *tx;
1213
1214 NULLCHECK(dev);
1215 eni_dev = ENI_DEV(dev);
1216 NULLCHECK(eni_dev);
1217 while ((skb = skb_dequeue(&eni_dev->tx_queue))) {
1218 vcc = ATM_SKB(skb)->vcc;
1219 NULLCHECK(vcc);
1220 tx = ENI_VCC(vcc)->tx;
1221 NULLCHECK(ENI_VCC(vcc)->tx);
1222 DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb),
1223 (unsigned) eni_in(MID_TX_DESCRSTART(tx->index)));
1224 if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) ==
1225 eni_in(MID_TX_DESCRSTART(tx->index))) {
1226 skb_queue_head(&eni_dev->tx_queue,skb);
1227 break;
1228 }
1229 ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb);
1230 dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len,
1231 DMA_TO_DEVICE);
1232 if (vcc->pop) vcc->pop(vcc,skb);
1233 else dev_kfree_skb_irq(skb);
1234 atomic_inc(&vcc->stats->tx);
1235 wake_up(&eni_dev->tx_wait);
1236 dma_complete++;
1237 }
1238}
1239
1240
1241static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr)
1242{
1243 int i;
1244
1245 for (i = !ubr; i < NR_CHAN; i++)
1246 if (!eni_dev->tx[i].send) return eni_dev->tx+i;
1247 return NULL;
1248}
1249
1250
1251static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre,
1252 int *res,int unlimited)
1253{
1254 static const int pre_div[] = { 4,16,128,2048 };
1255 /* 2^(((x+2)^2-(x+2))/2+1) */
1256
1257 if (unlimited) *pre = *res = 0;
1258 else {
1259 if (*pcr > 0) {
1260 int div;
1261
1262 for (*pre = 0; *pre < 3; (*pre)++)
1263 if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break;
1264 div = pre_div[*pre]**pcr;
1265 DPRINTK("min div %d\n",div);
1266 *res = TS_CLOCK/div-1;
1267 }
1268 else {
1269 int div;
1270
1271 if (!*pcr) *pcr = eni_dev->tx_bw+reserved;
1272 for (*pre = 3; *pre >= 0; (*pre)--)
1273 if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break;
1274 if (*pre < 3) (*pre)++; /* else fail later */
1275 div = pre_div[*pre]*-*pcr;
1276 DPRINTK("max div %d\n",div);
1277 *res = DIV_ROUND_UP(TS_CLOCK, div)-1;
1278 }
1279 if (*res < 0) *res = 0;
1280 if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE;
1281 }
1282 *pcr = TS_CLOCK/pre_div[*pre]/(*res+1);
1283 DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res);
1284 return 0;
1285}
1286
1287
1288static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp,
1289 int set_rsv,int set_shp)
1290{
1291 struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1292 struct eni_vcc *eni_vcc = ENI_VCC(vcc);
1293 struct eni_tx *tx;
1294 unsigned long size;
1295 void __iomem *mem;
1296 int rate,ubr,unlimited,new_tx;
1297 int pre,res,order;
1298 int error;
1299
1300 rate = atm_pcr_goal(txtp);
1301 ubr = txtp->traffic_class == ATM_UBR;
1302 unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR ||
1303 rate >= ATM_OC3_PCR);
1304 if (!unlimited) {
1305 size = txtp->max_sdu*eni_dev->tx_mult/100;
1306 if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <=
1307 MID_MAX_BUF_SIZE)
1308 size = MID_MAX_BUF_SIZE;
1309 }
1310 else {
1311 if (eni_dev->ubr) {
1312 eni_vcc->tx = eni_dev->ubr;
1313 txtp->pcr = ATM_OC3_PCR;
1314 return 0;
1315 }
1316 size = UBR_BUFFER;
1317 }
1318 new_tx = !eni_vcc->tx;
1319 mem = NULL; /* for gcc */
1320 if (!new_tx) tx = eni_vcc->tx;
1321 else {
1322 mem = eni_alloc_mem(eni_dev,&size);
1323 if (!mem) return -ENOBUFS;
1324 tx = alloc_tx(eni_dev,unlimited);
1325 if (!tx) {
1326 eni_free_mem(eni_dev,mem,size);
1327 return -EBUSY;
1328 }
1329 DPRINTK("got chan %d\n",tx->index);
1330 tx->reserved = tx->shaping = 0;
1331 tx->send = mem;
1332 tx->words = size >> 2;
1333 skb_queue_head_init(&tx->backlog);
1334 for (order = 0; size > (1 << (order+10)); order++);
1335 eni_out((order << MID_SIZE_SHIFT) |
1336 ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)),
1337 MID_TX_PLACE(tx->index));
1338 tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) &
1339 MID_DESCR_START;
1340 }
1341 error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited);
1342 if (!error && txtp->min_pcr > rate) error = -EINVAL;
1343 if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR &&
1344 txtp->max_pcr < rate) error = -EINVAL;
1345 if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved)
1346 error = -EINVAL;
1347 if (!error && set_rsv && !set_shp && rate < tx->shaping)
1348 error = -EINVAL;
1349 if (!error && !set_rsv && rate > tx->reserved && !ubr)
1350 error = -EINVAL;
1351 if (error) {
1352 if (new_tx) {
1353 tx->send = NULL;
1354 eni_free_mem(eni_dev,mem,size);
1355 }
1356 return error;
1357 }
1358 txtp->pcr = rate;
1359 if (set_rsv && !ubr) {
1360 eni_dev->tx_bw += tx->reserved;
1361 tx->reserved = rate;
1362 eni_dev->tx_bw -= rate;
1363 }
1364 if (set_shp || (unlimited && new_tx)) {
1365 if (unlimited && new_tx) eni_dev->ubr = tx;
1366 tx->prescaler = pre;
1367 tx->resolution = res;
1368 tx->shaping = rate;
1369 }
1370 if (set_shp) eni_vcc->tx = tx;
1371 DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping);
1372 return 0;
1373}
1374
1375
1376static int open_tx_first(struct atm_vcc *vcc)
1377{
1378 ENI_VCC(vcc)->tx = NULL;
1379 if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0;
1380 ENI_VCC(vcc)->txing = 0;
1381 return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1);
1382}
1383
1384
1385static int open_tx_second(struct atm_vcc *vcc)
1386{
1387 return 0; /* nothing to do */
1388}
1389
1390
1391static void close_tx(struct atm_vcc *vcc)
1392{
1393 DECLARE_WAITQUEUE(wait,current);
1394 struct eni_dev *eni_dev;
1395 struct eni_vcc *eni_vcc;
1396
1397 eni_vcc = ENI_VCC(vcc);
1398 if (!eni_vcc->tx) return;
1399 eni_dev = ENI_DEV(vcc->dev);
1400 /* wait for TX queue to drain */
1401 DPRINTK("eni_close: waiting for TX ...\n");
1402 add_wait_queue(&eni_dev->tx_wait,&wait);
1403 set_current_state(TASK_UNINTERRUPTIBLE);
1404 for (;;) {
1405 int txing;
1406
1407 tasklet_disable(&eni_dev->task);
1408 txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing;
1409 tasklet_enable(&eni_dev->task);
1410 if (!txing) break;
1411 DPRINTK("%d TX left\n",eni_vcc->txing);
1412 schedule();
1413 set_current_state(TASK_UNINTERRUPTIBLE);
1414 }
1415 set_current_state(TASK_RUNNING);
1416 remove_wait_queue(&eni_dev->tx_wait,&wait);
1417 if (eni_vcc->tx != eni_dev->ubr) {
1418 /*
1419 * Looping a few times in here is probably far cheaper than
1420 * keeping track of TX completions all the time, so let's poll
1421 * a bit ...
1422 */
1423 while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) !=
1424 eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index)))
1425 schedule();
1426 eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2);
1427 eni_vcc->tx->send = NULL;
1428 eni_dev->tx_bw += eni_vcc->tx->reserved;
1429 }
1430 eni_vcc->tx = NULL;
1431}
1432
1433
1434static int start_tx(struct atm_dev *dev)
1435{
1436 struct eni_dev *eni_dev;
1437 int i;
1438
1439 eni_dev = ENI_DEV(dev);
1440 eni_dev->lost = 0;
1441 eni_dev->tx_bw = ATM_OC3_PCR;
1442 eni_dev->tx_mult = DEFAULT_TX_MULT;
1443 init_waitqueue_head(&eni_dev->tx_wait);
1444 eni_dev->ubr = NULL;
1445 skb_queue_head_init(&eni_dev->tx_queue);
1446 eni_out(0,MID_DMA_WR_TX);
1447 for (i = 0; i < NR_CHAN; i++) {
1448 eni_dev->tx[i].send = NULL;
1449 eni_dev->tx[i].index = i;
1450 }
1451 return 0;
1452}
1453
1454
1455/*--------------------------------- common ----------------------------------*/
1456
1457
1458#if 0 /* may become useful again when tuning things */
1459
1460static void foo(void)
1461{
1462printk(KERN_INFO
1463 "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n"
1464 "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n",
1465 tx_complete,dma_complete,queued,requeued,submitted,backlogged,
1466 rx_enqueued,rx_dequeued,putting,pushed);
1467if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost);
1468}
1469
1470#endif
1471
1472
1473static void bug_int(struct atm_dev *dev,unsigned long reason)
1474{
1475 DPRINTK(">bug_int\n");
1476 if (reason & MID_DMA_ERR_ACK)
1477 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1478 "error\n",dev->number);
1479 if (reason & MID_TX_IDENT_MISM)
1480 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident "
1481 "mismatch\n",dev->number);
1482 if (reason & MID_TX_DMA_OVFL)
1483 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1484 "overflow\n",dev->number);
1485 EVENT("---dump ends here---\n",0,0);
1486 printk(KERN_NOTICE "---recent events---\n");
1487 event_dump();
1488}
1489
1490
1491static irqreturn_t eni_int(int irq,void *dev_id)
1492{
1493 struct atm_dev *dev;
1494 struct eni_dev *eni_dev;
1495 u32 reason;
1496
1497 DPRINTK(">eni_int\n");
1498 dev = dev_id;
1499 eni_dev = ENI_DEV(dev);
1500 reason = eni_in(MID_ISA);
1501 DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason);
1502 /*
1503 * Must handle these two right now, because reading ISA doesn't clear
1504 * them, so they re-occur and we never make it to the tasklet. Since
1505 * they're rare, we don't mind the occasional invocation of eni_tasklet
1506 * with eni_dev->events == 0.
1507 */
1508 if (reason & MID_STAT_OVFL) {
1509 EVENT("stat overflow\n",0,0);
1510 eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH;
1511 }
1512 if (reason & MID_SUNI_INT) {
1513 EVENT("SUNI int\n",0,0);
1514 dev->phy->interrupt(dev);
1515#if 0
1516 foo();
1517#endif
1518 }
1519 spin_lock(&eni_dev->lock);
1520 eni_dev->events |= reason;
1521 spin_unlock(&eni_dev->lock);
1522 tasklet_schedule(&eni_dev->task);
1523 return IRQ_HANDLED;
1524}
1525
1526
1527static void eni_tasklet(unsigned long data)
1528{
1529 struct atm_dev *dev = (struct atm_dev *) data;
1530 struct eni_dev *eni_dev = ENI_DEV(dev);
1531 unsigned long flags;
1532 u32 events;
1533
1534 DPRINTK("eni_tasklet (dev %p)\n",dev);
1535 spin_lock_irqsave(&eni_dev->lock,flags);
1536 events = xchg(&eni_dev->events,0);
1537 spin_unlock_irqrestore(&eni_dev->lock,flags);
1538 if (events & MID_RX_DMA_COMPLETE) {
1539 EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0);
1540 dequeue_rx(dev);
1541 EVENT("dequeue_rx done, starting poll_rx\n",0,0);
1542 poll_rx(dev);
1543 EVENT("poll_rx done\n",0,0);
1544 /* poll_tx ? */
1545 }
1546 if (events & MID_SERVICE) {
1547 EVENT("INT: service, starting get_service\n",0,0);
1548 get_service(dev);
1549 EVENT("get_service done, starting poll_rx\n",0,0);
1550 poll_rx(dev);
1551 EVENT("poll_rx done\n",0,0);
1552 }
1553 if (events & MID_TX_DMA_COMPLETE) {
1554 EVENT("INT: TX DMA COMPLETE\n",0,0);
1555 dequeue_tx(dev);
1556 }
1557 if (events & MID_TX_COMPLETE) {
1558 EVENT("INT: TX COMPLETE\n",0,0);
1559 tx_complete++;
1560 wake_up(&eni_dev->tx_wait);
1561 /* poll_rx ? */
1562 }
1563 if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) {
1564 EVENT("bug interrupt\n",0,0);
1565 bug_int(dev,events);
1566 }
1567 poll_tx(dev);
1568}
1569
1570
1571/*--------------------------------- entries ---------------------------------*/
1572
1573
1574static char * const media_name[] = {
1575 "MMF", "SMF", "MMF", "03?", /* 0- 3 */
1576 "UTP", "05?", "06?", "07?", /* 4- 7 */
1577 "TAXI","09?", "10?", "11?", /* 8-11 */
1578 "12?", "13?", "14?", "15?", /* 12-15 */
1579 "MMF", "SMF", "18?", "19?", /* 16-19 */
1580 "UTP", "21?", "22?", "23?", /* 20-23 */
1581 "24?", "25?", "26?", "27?", /* 24-27 */
1582 "28?", "29?", "30?", "31?" /* 28-31 */
1583};
1584
1585
1586#define SET_SEPROM \
1587 ({ if (!error && !pci_error) { \
1588 pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \
1589 udelay(10); /* 10 usecs */ \
1590 } })
1591#define GET_SEPROM \
1592 ({ if (!error && !pci_error) { \
1593 pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \
1594 udelay(10); /* 10 usecs */ \
1595 } })
1596
1597
1598static int get_esi_asic(struct atm_dev *dev)
1599{
1600 struct eni_dev *eni_dev;
1601 unsigned char tonga;
1602 int error,failed,pci_error;
1603 int address,i,j;
1604
1605 eni_dev = ENI_DEV(dev);
1606 error = pci_error = 0;
1607 tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK;
1608 SET_SEPROM;
1609 for (i = 0; i < ESI_LEN && !error && !pci_error; i++) {
1610 /* start operation */
1611 tonga |= SEPROM_DATA;
1612 SET_SEPROM;
1613 tonga |= SEPROM_CLK;
1614 SET_SEPROM;
1615 tonga &= ~SEPROM_DATA;
1616 SET_SEPROM;
1617 tonga &= ~SEPROM_CLK;
1618 SET_SEPROM;
1619 /* send address */
1620 address = ((i+SEPROM_ESI_BASE) << 1)+1;
1621 for (j = 7; j >= 0; j--) {
1622 tonga = (address >> j) & 1 ? tonga | SEPROM_DATA :
1623 tonga & ~SEPROM_DATA;
1624 SET_SEPROM;
1625 tonga |= SEPROM_CLK;
1626 SET_SEPROM;
1627 tonga &= ~SEPROM_CLK;
1628 SET_SEPROM;
1629 }
1630 /* get ack */
1631 tonga |= SEPROM_DATA;
1632 SET_SEPROM;
1633 tonga |= SEPROM_CLK;
1634 SET_SEPROM;
1635 GET_SEPROM;
1636 failed = tonga & SEPROM_DATA;
1637 tonga &= ~SEPROM_CLK;
1638 SET_SEPROM;
1639 tonga |= SEPROM_DATA;
1640 SET_SEPROM;
1641 if (failed) error = -EIO;
1642 else {
1643 dev->esi[i] = 0;
1644 for (j = 7; j >= 0; j--) {
1645 dev->esi[i] <<= 1;
1646 tonga |= SEPROM_DATA;
1647 SET_SEPROM;
1648 tonga |= SEPROM_CLK;
1649 SET_SEPROM;
1650 GET_SEPROM;
1651 if (tonga & SEPROM_DATA) dev->esi[i] |= 1;
1652 tonga &= ~SEPROM_CLK;
1653 SET_SEPROM;
1654 tonga |= SEPROM_DATA;
1655 SET_SEPROM;
1656 }
1657 /* get ack */
1658 tonga |= SEPROM_DATA;
1659 SET_SEPROM;
1660 tonga |= SEPROM_CLK;
1661 SET_SEPROM;
1662 GET_SEPROM;
1663 if (!(tonga & SEPROM_DATA)) error = -EIO;
1664 tonga &= ~SEPROM_CLK;
1665 SET_SEPROM;
1666 tonga |= SEPROM_DATA;
1667 SET_SEPROM;
1668 }
1669 /* stop operation */
1670 tonga &= ~SEPROM_DATA;
1671 SET_SEPROM;
1672 tonga |= SEPROM_CLK;
1673 SET_SEPROM;
1674 tonga |= SEPROM_DATA;
1675 SET_SEPROM;
1676 }
1677 if (pci_error) {
1678 printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI "
1679 "(0x%02x)\n",dev->number,pci_error);
1680 error = -EIO;
1681 }
1682 return error;
1683}
1684
1685
1686#undef SET_SEPROM
1687#undef GET_SEPROM
1688
1689
1690static int get_esi_fpga(struct atm_dev *dev, void __iomem *base)
1691{
1692 void __iomem *mac_base;
1693 int i;
1694
1695 mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom);
1696 for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3));
1697 return 0;
1698}
1699
1700
1701static int eni_do_init(struct atm_dev *dev)
1702{
1703 struct midway_eprom __iomem *eprom;
1704 struct eni_dev *eni_dev;
1705 struct pci_dev *pci_dev;
1706 unsigned long real_base;
1707 void __iomem *base;
1708 int error,i,last;
1709
1710 DPRINTK(">eni_init\n");
1711 dev->ci_range.vpi_bits = 0;
1712 dev->ci_range.vci_bits = NR_VCI_LD;
1713 dev->link_rate = ATM_OC3_PCR;
1714 eni_dev = ENI_DEV(dev);
1715 pci_dev = eni_dev->pci_dev;
1716 real_base = pci_resource_start(pci_dev, 0);
1717 eni_dev->irq = pci_dev->irq;
1718 if ((error = pci_write_config_word(pci_dev,PCI_COMMAND,
1719 PCI_COMMAND_MEMORY |
1720 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1721 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory "
1722 "(0x%02x)\n",dev->number,error);
1723 return -EIO;
1724 }
1725 printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,",
1726 dev->number,pci_dev->revision,real_base,eni_dev->irq);
1727 if (!(base = ioremap_nocache(real_base,MAP_MAX_SIZE))) {
1728 printk("\n");
1729 printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page "
1730 "mapping\n",dev->number);
1731 return -ENOMEM;
1732 }
1733 eni_dev->ioaddr = base;
1734 eni_dev->base_diff = real_base - (unsigned long) base;
1735 /* id may not be present in ASIC Tonga boards - check this @@@ */
1736 if (!eni_dev->asic) {
1737 eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom));
1738 if (readl(&eprom->magic) != ENI155_MAGIC) {
1739 printk("\n");
1740 printk(KERN_ERR DEV_LABEL
1741 "(itf %d): bad magic - expected 0x%x, got 0x%x\n",
1742 dev->number, ENI155_MAGIC,
1743 (unsigned)readl(&eprom->magic));
1744 error = -EINVAL;
1745 goto unmap;
1746 }
1747 }
1748 eni_dev->phy = base+PHY_BASE;
1749 eni_dev->reg = base+REG_BASE;
1750 eni_dev->ram = base+RAM_BASE;
1751 last = MAP_MAX_SIZE-RAM_BASE;
1752 for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) {
1753 writel(0x55555555,eni_dev->ram+i);
1754 if (readl(eni_dev->ram+i) != 0x55555555) last = i;
1755 else {
1756 writel(0xAAAAAAAA,eni_dev->ram+i);
1757 if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i;
1758 else writel(i,eni_dev->ram+i);
1759 }
1760 }
1761 for (i = 0; i < last; i += RAM_INCREMENT)
1762 if (readl(eni_dev->ram+i) != i) break;
1763 eni_dev->mem = i;
1764 memset_io(eni_dev->ram,0,eni_dev->mem);
1765 /* TODO: should shrink allocation now */
1766 printk("mem=%dkB (",eni_dev->mem >> 10);
1767 /* TODO: check for non-SUNI, check for TAXI ? */
1768 if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) {
1769 printk(")\n");
1770 printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n",
1771 dev->number,(unsigned) eni_in(MID_RES_ID_MCON));
1772 error = -EINVAL;
1773 goto unmap;
1774 }
1775 error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base);
1776 if (error)
1777 goto unmap;
1778 for (i = 0; i < ESI_LEN; i++)
1779 printk("%s%02X",i ? "-" : "",dev->esi[i]);
1780 printk(")\n");
1781 printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number,
1782 eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA",
1783 media_name[eni_in(MID_RES_ID_MCON) & DAUGHTER_ID]);
1784
1785 error = suni_init(dev);
1786 if (error)
1787 goto unmap;
1788out:
1789 return error;
1790unmap:
1791 iounmap(base);
1792 goto out;
1793}
1794
1795static void eni_do_release(struct atm_dev *dev)
1796{
1797 struct eni_dev *ed = ENI_DEV(dev);
1798
1799 dev->phy->stop(dev);
1800 dev->phy = NULL;
1801 iounmap(ed->ioaddr);
1802}
1803
1804static int eni_start(struct atm_dev *dev)
1805{
1806 struct eni_dev *eni_dev;
1807
1808 void __iomem *buf;
1809 unsigned long buffer_mem;
1810 int error;
1811
1812 DPRINTK(">eni_start\n");
1813 eni_dev = ENI_DEV(dev);
1814 if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) {
1815 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
1816 dev->number,eni_dev->irq);
1817 error = -EAGAIN;
1818 goto out;
1819 }
1820 pci_set_master(eni_dev->pci_dev);
1821 if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND,
1822 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
1823 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1824 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+"
1825 "master (0x%02x)\n",dev->number,error);
1826 goto free_irq;
1827 }
1828 if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,
1829 END_SWAP_DMA))) {
1830 printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap "
1831 "(0x%02x)\n",dev->number,error);
1832 goto free_irq;
1833 }
1834 /* determine addresses of internal tables */
1835 eni_dev->vci = eni_dev->ram;
1836 eni_dev->rx_dma = eni_dev->ram+NR_VCI*16;
1837 eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8;
1838 eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8;
1839 buf = eni_dev->service+NR_SERVICE*4;
1840 DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n",
1841 eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma,
1842 eni_dev->service,buf);
1843 spin_lock_init(&eni_dev->lock);
1844 tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev);
1845 eni_dev->events = 0;
1846 /* initialize memory management */
1847 buffer_mem = eni_dev->mem - (buf - eni_dev->ram);
1848 eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2;
1849 eni_dev->free_list = kmalloc_array(eni_dev->free_list_size + 1,
1850 sizeof(*eni_dev->free_list),
1851 GFP_KERNEL);
1852 if (!eni_dev->free_list) {
1853 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
1854 dev->number);
1855 error = -ENOMEM;
1856 goto free_irq;
1857 }
1858 eni_dev->free_len = 0;
1859 eni_put_free(eni_dev,buf,buffer_mem);
1860 memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */
1861 /*
1862 * byte_addr free (k)
1863 * 0x00000000 512 VCI table
1864 * 0x00004000 496 RX DMA
1865 * 0x00005000 492 TX DMA
1866 * 0x00006000 488 service list
1867 * 0x00007000 484 buffers
1868 * 0x00080000 0 end (512kB)
1869 */
1870 eni_out(0xffffffff,MID_IE);
1871 error = start_tx(dev);
1872 if (error) goto free_list;
1873 error = start_rx(dev);
1874 if (error) goto free_list;
1875 error = dev->phy->start(dev);
1876 if (error) goto free_list;
1877 eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) |
1878 MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE,
1879 MID_MC_S);
1880 /* Tonga uses SBus INTReq1 */
1881 (void) eni_in(MID_ISA); /* clear Midway interrupts */
1882 return 0;
1883
1884free_list:
1885 kfree(eni_dev->free_list);
1886
1887free_irq:
1888 free_irq(eni_dev->irq, dev);
1889
1890out:
1891 return error;
1892}
1893
1894
1895static void eni_close(struct atm_vcc *vcc)
1896{
1897 DPRINTK(">eni_close\n");
1898 if (!ENI_VCC(vcc)) return;
1899 clear_bit(ATM_VF_READY,&vcc->flags);
1900 close_rx(vcc);
1901 close_tx(vcc);
1902 DPRINTK("eni_close: done waiting\n");
1903 /* deallocate memory */
1904 kfree(ENI_VCC(vcc));
1905 vcc->dev_data = NULL;
1906 clear_bit(ATM_VF_ADDR,&vcc->flags);
1907 /*foo();*/
1908}
1909
1910
1911static int eni_open(struct atm_vcc *vcc)
1912{
1913 struct eni_vcc *eni_vcc;
1914 int error;
1915 short vpi = vcc->vpi;
1916 int vci = vcc->vci;
1917
1918 DPRINTK(">eni_open\n");
1919 EVENT("eni_open\n",0,0);
1920 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1921 vcc->dev_data = NULL;
1922 if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
1923 set_bit(ATM_VF_ADDR,&vcc->flags);
1924 if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5)
1925 return -EINVAL;
1926 DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi,
1927 vcc->vci);
1928 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
1929 eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL);
1930 if (!eni_vcc) return -ENOMEM;
1931 vcc->dev_data = eni_vcc;
1932 eni_vcc->tx = NULL; /* for eni_close after open_rx */
1933 if ((error = open_rx_first(vcc))) {
1934 eni_close(vcc);
1935 return error;
1936 }
1937 if ((error = open_tx_first(vcc))) {
1938 eni_close(vcc);
1939 return error;
1940 }
1941 }
1942 if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0;
1943 if ((error = open_rx_second(vcc))) {
1944 eni_close(vcc);
1945 return error;
1946 }
1947 if ((error = open_tx_second(vcc))) {
1948 eni_close(vcc);
1949 return error;
1950 }
1951 set_bit(ATM_VF_READY,&vcc->flags);
1952 /* should power down SUNI while !ref_count @@@ */
1953 return 0;
1954}
1955
1956
1957static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs)
1958{
1959 struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1960 struct eni_tx *tx = ENI_VCC(vcc)->tx;
1961 struct sk_buff *skb;
1962 int error,rate,rsv,shp;
1963
1964 if (qos->txtp.traffic_class == ATM_NONE) return 0;
1965 if (tx == eni_dev->ubr) return -EBADFD;
1966 rate = atm_pcr_goal(&qos->txtp);
1967 if (rate < 0) rate = -rate;
1968 rsv = shp = 0;
1969 if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1;
1970 if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1;
1971 if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1;
1972 if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1;
1973 if (!rsv && !shp) return 0;
1974 error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp);
1975 if (error) return error;
1976 if (shp && !(flgs & ATM_MF_IMMED)) return 0;
1977 /*
1978 * Walk through the send buffer and patch the rate information in all
1979 * segmentation buffer descriptors of this VCC.
1980 */
1981 tasklet_disable(&eni_dev->task);
1982 skb_queue_walk(&eni_dev->tx_queue, skb) {
1983 void __iomem *dsc;
1984
1985 if (ATM_SKB(skb)->vcc != vcc) continue;
1986 dsc = tx->send+ENI_PRV_POS(skb)*4;
1987 writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) |
1988 (tx->prescaler << MID_SEG_PR_SHIFT) |
1989 (tx->resolution << MID_SEG_RATE_SHIFT), dsc);
1990 }
1991 tasklet_enable(&eni_dev->task);
1992 return 0;
1993}
1994
1995
1996static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
1997{
1998 struct eni_dev *eni_dev = ENI_DEV(dev);
1999
2000 if (cmd == ENI_MEMDUMP) {
2001 if (!capable(CAP_NET_ADMIN)) return -EPERM;
2002 printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d "
2003 "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number);
2004 dump(dev);
2005 return 0;
2006 }
2007 if (cmd == ENI_SETMULT) {
2008 struct eni_multipliers mult;
2009
2010 if (!capable(CAP_NET_ADMIN)) return -EPERM;
2011 if (copy_from_user(&mult, arg,
2012 sizeof(struct eni_multipliers)))
2013 return -EFAULT;
2014 if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) ||
2015 mult.tx > 65536 || mult.rx > 65536)
2016 return -EINVAL;
2017 if (mult.tx) eni_dev->tx_mult = mult.tx;
2018 if (mult.rx) eni_dev->rx_mult = mult.rx;
2019 return 0;
2020 }
2021 if (cmd == ATM_SETCIRANGE) {
2022 struct atm_cirange ci;
2023
2024 if (copy_from_user(&ci, arg,sizeof(struct atm_cirange)))
2025 return -EFAULT;
2026 if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) &&
2027 (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX))
2028 return 0;
2029 return -EINVAL;
2030 }
2031 if (!dev->phy->ioctl) return -ENOIOCTLCMD;
2032 return dev->phy->ioctl(dev,cmd,arg);
2033}
2034
2035
2036static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname,
2037 void __user *optval,int optlen)
2038{
2039 return -EINVAL;
2040}
2041
2042
2043static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname,
2044 void __user *optval,unsigned int optlen)
2045{
2046 return -EINVAL;
2047}
2048
2049
2050static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb)
2051{
2052 enum enq_res res;
2053
2054 DPRINTK(">eni_send\n");
2055 if (!ENI_VCC(vcc)->tx) {
2056 if (vcc->pop) vcc->pop(vcc,skb);
2057 else dev_kfree_skb(skb);
2058 return -EINVAL;
2059 }
2060 if (!skb) {
2061 printk(KERN_CRIT "!skb in eni_send ?\n");
2062 if (vcc->pop) vcc->pop(vcc,skb);
2063 return -EINVAL;
2064 }
2065 if (vcc->qos.aal == ATM_AAL0) {
2066 if (skb->len != ATM_CELL_SIZE-1) {
2067 if (vcc->pop) vcc->pop(vcc,skb);
2068 else dev_kfree_skb(skb);
2069 return -EINVAL;
2070 }
2071 *(u32 *) skb->data = htonl(*(u32 *) skb->data);
2072 }
2073 submitted++;
2074 ATM_SKB(skb)->vcc = vcc;
2075 tasklet_disable(&ENI_DEV(vcc->dev)->task);
2076 res = do_tx(skb);
2077 tasklet_enable(&ENI_DEV(vcc->dev)->task);
2078 if (res == enq_ok) return 0;
2079 skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb);
2080 backlogged++;
2081 tasklet_schedule(&ENI_DEV(vcc->dev)->task);
2082 return 0;
2083}
2084
2085static void eni_phy_put(struct atm_dev *dev,unsigned char value,
2086 unsigned long addr)
2087{
2088 writel(value,ENI_DEV(dev)->phy+addr*4);
2089}
2090
2091
2092
2093static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr)
2094{
2095 return readl(ENI_DEV(dev)->phy+addr*4);
2096}
2097
2098
2099static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page)
2100{
2101 struct sock *s;
2102 static const char *signal[] = { "LOST","unknown","okay" };
2103 struct eni_dev *eni_dev = ENI_DEV(dev);
2104 struct atm_vcc *vcc;
2105 int left,i;
2106
2107 left = *pos;
2108 if (!left)
2109 return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, "
2110 "%d cps remaining\n",dev->number,signal[(int) dev->signal],
2111 eni_dev->mem >> 10,eni_dev->tx_bw);
2112 if (!--left)
2113 return sprintf(page,"%4sBursts: TX"
2114#if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \
2115 !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \
2116 !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \
2117 !defined(CONFIG_ATM_ENI_BURST_TX_2W)
2118 " none"
2119#endif
2120#ifdef CONFIG_ATM_ENI_BURST_TX_16W
2121 " 16W"
2122#endif
2123#ifdef CONFIG_ATM_ENI_BURST_TX_8W
2124 " 8W"
2125#endif
2126#ifdef CONFIG_ATM_ENI_BURST_TX_4W
2127 " 4W"
2128#endif
2129#ifdef CONFIG_ATM_ENI_BURST_TX_2W
2130 " 2W"
2131#endif
2132 ", RX"
2133#if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \
2134 !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \
2135 !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \
2136 !defined(CONFIG_ATM_ENI_BURST_RX_2W)
2137 " none"
2138#endif
2139#ifdef CONFIG_ATM_ENI_BURST_RX_16W
2140 " 16W"
2141#endif
2142#ifdef CONFIG_ATM_ENI_BURST_RX_8W
2143 " 8W"
2144#endif
2145#ifdef CONFIG_ATM_ENI_BURST_RX_4W
2146 " 4W"
2147#endif
2148#ifdef CONFIG_ATM_ENI_BURST_RX_2W
2149 " 2W"
2150#endif
2151#ifndef CONFIG_ATM_ENI_TUNE_BURST
2152 " (default)"
2153#endif
2154 "\n","");
2155 if (!--left)
2156 return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n",
2157 "",eni_dev->tx_mult,eni_dev->rx_mult);
2158 for (i = 0; i < NR_CHAN; i++) {
2159 struct eni_tx *tx = eni_dev->tx+i;
2160
2161 if (!tx->send) continue;
2162 if (!--left) {
2163 return sprintf(page, "tx[%d]: 0x%lx-0x%lx "
2164 "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i,
2165 (unsigned long) (tx->send - eni_dev->ram),
2166 tx->send-eni_dev->ram+tx->words*4-1,tx->words*4,
2167 tx->reserved,tx->shaping,
2168 tx == eni_dev->ubr ? " (UBR)" : "");
2169 }
2170 if (--left) continue;
2171 return sprintf(page,"%10sbacklog %u packets\n","",
2172 skb_queue_len(&tx->backlog));
2173 }
2174 read_lock(&vcc_sklist_lock);
2175 for(i = 0; i < VCC_HTABLE_SIZE; ++i) {
2176 struct hlist_head *head = &vcc_hash[i];
2177
2178 sk_for_each(s, head) {
2179 struct eni_vcc *eni_vcc;
2180 int length;
2181
2182 vcc = atm_sk(s);
2183 if (vcc->dev != dev)
2184 continue;
2185 eni_vcc = ENI_VCC(vcc);
2186 if (--left) continue;
2187 length = sprintf(page,"vcc %4d: ",vcc->vci);
2188 if (eni_vcc->rx) {
2189 length += sprintf(page+length, "0x%lx-0x%lx "
2190 "(%6ld bytes)",
2191 (unsigned long) (eni_vcc->recv - eni_dev->ram),
2192 eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1,
2193 eni_vcc->words*4);
2194 if (eni_vcc->tx) length += sprintf(page+length,", ");
2195 }
2196 if (eni_vcc->tx)
2197 length += sprintf(page+length,"tx[%d], txing %d bytes",
2198 eni_vcc->tx->index,eni_vcc->txing);
2199 page[length] = '\n';
2200 read_unlock(&vcc_sklist_lock);
2201 return length+1;
2202 }
2203 }
2204 read_unlock(&vcc_sklist_lock);
2205 for (i = 0; i < eni_dev->free_len; i++) {
2206 struct eni_free *fe = eni_dev->free_list+i;
2207 unsigned long offset;
2208
2209 if (--left) continue;
2210 offset = (unsigned long) eni_dev->ram+eni_dev->base_diff;
2211 return sprintf(page,"free %p-%p (%6d bytes)\n",
2212 fe->start-offset,fe->start-offset+(1 << fe->order)-1,
2213 1 << fe->order);
2214 }
2215 return 0;
2216}
2217
2218
2219static const struct atmdev_ops ops = {
2220 .open = eni_open,
2221 .close = eni_close,
2222 .ioctl = eni_ioctl,
2223 .getsockopt = eni_getsockopt,
2224 .setsockopt = eni_setsockopt,
2225 .send = eni_send,
2226 .phy_put = eni_phy_put,
2227 .phy_get = eni_phy_get,
2228 .change_qos = eni_change_qos,
2229 .proc_read = eni_proc_read
2230};
2231
2232
2233static int eni_init_one(struct pci_dev *pci_dev,
2234 const struct pci_device_id *ent)
2235{
2236 struct atm_dev *dev;
2237 struct eni_dev *eni_dev;
2238 struct eni_zero *zero;
2239 int rc;
2240
2241 rc = pci_enable_device(pci_dev);
2242 if (rc < 0)
2243 goto out;
2244
2245 rc = dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(32));
2246 if (rc < 0)
2247 goto out;
2248
2249 rc = -ENOMEM;
2250 eni_dev = kmalloc(sizeof(struct eni_dev), GFP_KERNEL);
2251 if (!eni_dev)
2252 goto err_disable;
2253
2254 zero = &eni_dev->zero;
2255 zero->addr = dma_alloc_coherent(&pci_dev->dev,
2256 ENI_ZEROES_SIZE, &zero->dma, GFP_KERNEL);
2257 if (!zero->addr)
2258 goto err_kfree;
2259
2260 dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL);
2261 if (!dev)
2262 goto err_free_consistent;
2263
2264 dev->dev_data = eni_dev;
2265 pci_set_drvdata(pci_dev, dev);
2266 eni_dev->pci_dev = pci_dev;
2267 eni_dev->asic = ent->driver_data;
2268
2269 rc = eni_do_init(dev);
2270 if (rc < 0)
2271 goto err_unregister;
2272
2273 rc = eni_start(dev);
2274 if (rc < 0)
2275 goto err_eni_release;
2276
2277 eni_dev->more = eni_boards;
2278 eni_boards = dev;
2279out:
2280 return rc;
2281
2282err_eni_release:
2283 eni_do_release(dev);
2284err_unregister:
2285 atm_dev_deregister(dev);
2286err_free_consistent:
2287 dma_free_coherent(&pci_dev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2288err_kfree:
2289 kfree(eni_dev);
2290err_disable:
2291 pci_disable_device(pci_dev);
2292 goto out;
2293}
2294
2295
2296static const struct pci_device_id eni_pci_tbl[] = {
2297 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_FPGA), 0 /* FPGA */ },
2298 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_ASIC), 1 /* ASIC */ },
2299 { 0, }
2300};
2301MODULE_DEVICE_TABLE(pci,eni_pci_tbl);
2302
2303
2304static void eni_remove_one(struct pci_dev *pdev)
2305{
2306 struct atm_dev *dev = pci_get_drvdata(pdev);
2307 struct eni_dev *ed = ENI_DEV(dev);
2308 struct eni_zero *zero = &ed->zero;
2309
2310 eni_do_release(dev);
2311 atm_dev_deregister(dev);
2312 dma_free_coherent(&pdev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2313 kfree(ed);
2314 pci_disable_device(pdev);
2315}
2316
2317
2318static struct pci_driver eni_driver = {
2319 .name = DEV_LABEL,
2320 .id_table = eni_pci_tbl,
2321 .probe = eni_init_one,
2322 .remove = eni_remove_one,
2323};
2324
2325
2326static int __init eni_init(void)
2327{
2328 struct sk_buff *skb; /* dummy for sizeof */
2329
2330 BUILD_BUG_ON(sizeof(skb->cb) < sizeof(struct eni_skb_prv));
2331 return pci_register_driver(&eni_driver);
2332}
2333
2334
2335module_init(eni_init);
2336/* @@@ since exit routine not defined, this module can not be unloaded */
2337
2338MODULE_LICENSE("GPL");
2339