Loading...
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/system.h>
23#include <asm/io.h>
24#include <linux/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 */
63
64
65#if 0
66#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
67#else
68#define DPRINTK(format,args...)
69#endif
70
71
72#ifndef CONFIG_ATM_ENI_TUNE_BURST
73#define CONFIG_ATM_ENI_BURST_TX_8W
74#define CONFIG_ATM_ENI_BURST_RX_4W
75#endif
76
77
78#ifndef CONFIG_ATM_ENI_DEBUG
79
80
81#define NULLCHECK(x)
82
83#define EVENT(s,a,b)
84
85
86static void event_dump(void)
87{
88}
89
90
91#else
92
93
94/*
95 * NULL pointer checking
96 */
97
98#define NULLCHECK(x) \
99 if ((unsigned long) (x) < 0x30) \
100 printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x))
101
102/*
103 * Very extensive activity logging. Greatly improves bug detection speed but
104 * costs a few Mbps if enabled.
105 */
106
107#define EV 64
108
109static const char *ev[EV];
110static unsigned long ev_a[EV],ev_b[EV];
111static int ec = 0;
112
113
114static void EVENT(const char *s,unsigned long a,unsigned long b)
115{
116 ev[ec] = s;
117 ev_a[ec] = a;
118 ev_b[ec] = b;
119 ec = (ec+1) % EV;
120}
121
122
123static void event_dump(void)
124{
125 int n,i;
126
127 for (n = 0; n < EV; n++) {
128 i = (ec+n) % EV;
129 printk(KERN_NOTICE);
130 printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]);
131 }
132}
133
134
135#endif /* CONFIG_ATM_ENI_DEBUG */
136
137
138/*
139 * NExx must not be equal at end
140 * EExx may be equal at end
141 * xxPJOK verify validity of pointer jumps
142 * xxPMOK operating on a circular buffer of "c" words
143 */
144
145#define NEPJOK(a0,a1,b) \
146 ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1))
147#define EEPJOK(a0,a1,b) \
148 ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1))
149#define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b)
150#define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b)
151
152
153static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0,
154 backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0,
155 putting = 0;
156
157static struct atm_dev *eni_boards = NULL;
158
159static u32 *cpu_zeroes = NULL; /* aligned "magic" zeroes */
160static dma_addr_t zeroes;
161
162/* Read/write registers on card */
163#define eni_in(r) readl(eni_dev->reg+(r)*4)
164#define eni_out(v,r) writel((v),eni_dev->reg+(r)*4)
165
166
167/*-------------------------------- utilities --------------------------------*/
168
169
170static void dump_mem(struct eni_dev *eni_dev)
171{
172 int i;
173
174 for (i = 0; i < eni_dev->free_len; i++)
175 printk(KERN_DEBUG " %d: %p %d\n",i,
176 eni_dev->free_list[i].start,
177 1 << eni_dev->free_list[i].order);
178}
179
180
181static void dump(struct atm_dev *dev)
182{
183 struct eni_dev *eni_dev;
184
185 int i;
186
187 eni_dev = ENI_DEV(dev);
188 printk(KERN_NOTICE "Free memory\n");
189 dump_mem(eni_dev);
190 printk(KERN_NOTICE "TX buffers\n");
191 for (i = 0; i < NR_CHAN; i++)
192 if (eni_dev->tx[i].send)
193 printk(KERN_NOTICE " TX %d @ %p: %ld\n",i,
194 eni_dev->tx[i].send,eni_dev->tx[i].words*4);
195 printk(KERN_NOTICE "RX buffers\n");
196 for (i = 0; i < 1024; i++)
197 if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx)
198 printk(KERN_NOTICE " RX %d @ %p: %ld\n",i,
199 ENI_VCC(eni_dev->rx_map[i])->recv,
200 ENI_VCC(eni_dev->rx_map[i])->words*4);
201 printk(KERN_NOTICE "----\n");
202}
203
204
205static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start,
206 unsigned long size)
207{
208 struct eni_free *list;
209 int len,order;
210
211 DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size);
212 start += eni_dev->base_diff;
213 list = eni_dev->free_list;
214 len = eni_dev->free_len;
215 while (size) {
216 if (len >= eni_dev->free_list_size) {
217 printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n",
218 start,size);
219 break;
220 }
221 for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++);
222 if (MID_MIN_BUF_SIZE > (1 << order)) {
223 printk(KERN_CRIT "eni_put_free: order %d too small\n",
224 order);
225 break;
226 }
227 list[len].start = (void __iomem *) start;
228 list[len].order = order;
229 len++;
230 start += 1 << order;
231 size -= 1 << order;
232 }
233 eni_dev->free_len = len;
234 /*dump_mem(eni_dev);*/
235}
236
237
238static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size)
239{
240 struct eni_free *list;
241 void __iomem *start;
242 int len,i,order,best_order,index;
243
244 list = eni_dev->free_list;
245 len = eni_dev->free_len;
246 if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE;
247 if (*size > MID_MAX_BUF_SIZE) return NULL;
248 for (order = 0; (1 << order) < *size; order++);
249 DPRINTK("trying: %ld->%d\n",*size,order);
250 best_order = 65; /* we don't have more than 2^64 of anything ... */
251 index = 0; /* silence GCC */
252 for (i = 0; i < len; i++)
253 if (list[i].order == order) {
254 best_order = order;
255 index = i;
256 break;
257 }
258 else if (best_order > list[i].order && list[i].order > order) {
259 best_order = list[i].order;
260 index = i;
261 }
262 if (best_order == 65) return NULL;
263 start = list[index].start-eni_dev->base_diff;
264 list[index] = list[--len];
265 eni_dev->free_len = len;
266 *size = 1 << order;
267 eni_put_free(eni_dev,start+*size,(1 << best_order)-*size);
268 DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start);
269 memset_io(start,0,*size); /* never leak data */
270 /*dump_mem(eni_dev);*/
271 return start;
272}
273
274
275static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start,
276 unsigned long size)
277{
278 struct eni_free *list;
279 int len,i,order;
280
281 start += eni_dev->base_diff;
282 list = eni_dev->free_list;
283 len = eni_dev->free_len;
284 for (order = -1; size; order++) size >>= 1;
285 DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order);
286 for (i = 0; i < len; i++)
287 if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) &&
288 list[i].order == order) {
289 DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i,
290 list[i].start,start,1 << order,list[i].order,order);
291 list[i] = list[--len];
292 start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order));
293 order++;
294 i = -1;
295 continue;
296 }
297 if (len >= eni_dev->free_list_size) {
298 printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start,
299 order);
300 return;
301 }
302 list[len].start = start;
303 list[len].order = order;
304 eni_dev->free_len = len+1;
305 /*dump_mem(eni_dev);*/
306}
307
308
309/*----------------------------------- RX ------------------------------------*/
310
311
312#define ENI_VCC_NOS ((struct atm_vcc *) 1)
313
314
315static void rx_ident_err(struct atm_vcc *vcc)
316{
317 struct atm_dev *dev;
318 struct eni_dev *eni_dev;
319 struct eni_vcc *eni_vcc;
320
321 dev = vcc->dev;
322 eni_dev = ENI_DEV(dev);
323 /* immediately halt adapter */
324 eni_out(eni_in(MID_MC_S) &
325 ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S);
326 /* dump useful information */
327 eni_vcc = ENI_VCC(vcc);
328 printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident "
329 "mismatch\n",dev->number);
330 printk(KERN_ALERT " VCI %d, rxing %d, words %ld\n",vcc->vci,
331 eni_vcc->rxing,eni_vcc->words);
332 printk(KERN_ALERT " host descr 0x%lx, rx pos 0x%lx, descr value "
333 "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos,
334 (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4));
335 printk(KERN_ALERT " last %p, servicing %d\n",eni_vcc->last,
336 eni_vcc->servicing);
337 EVENT("---dump ends here---\n",0,0);
338 printk(KERN_NOTICE "---recent events---\n");
339 event_dump();
340 ENI_DEV(dev)->fast = NULL; /* really stop it */
341 ENI_DEV(dev)->slow = NULL;
342 skb_queue_head_init(&ENI_DEV(dev)->rx_queue);
343}
344
345
346static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb,
347 unsigned long skip,unsigned long size,unsigned long eff)
348{
349 struct eni_dev *eni_dev;
350 struct eni_vcc *eni_vcc;
351 u32 dma_rd,dma_wr;
352 u32 dma[RX_DMA_BUF*2];
353 dma_addr_t paddr;
354 unsigned long here;
355 int i,j;
356
357 eni_dev = ENI_DEV(vcc->dev);
358 eni_vcc = ENI_VCC(vcc);
359 paddr = 0; /* GCC, shut up */
360 if (skb) {
361 paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len,
362 PCI_DMA_FROMDEVICE);
363 ENI_PRV_PADDR(skb) = paddr;
364 if (paddr & 3)
365 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has "
366 "mis-aligned RX data (0x%lx)\n",vcc->dev->number,
367 vcc->vci,(unsigned long) paddr);
368 ENI_PRV_SIZE(skb) = size+skip;
369 /* PDU plus descriptor */
370 ATM_SKB(skb)->vcc = vcc;
371 }
372 j = 0;
373 if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */
374 here = (eni_vcc->descr+skip) & (eni_vcc->words-1);
375 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci
376 << MID_DMA_VCI_SHIFT) | MID_DT_JK;
377 j++;
378 }
379 here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1);
380 if (!eff) size += skip;
381 else {
382 unsigned long words;
383
384 if (!size) {
385 DPRINTK("strange things happen ...\n");
386 EVENT("strange things happen ... (skip=%ld,eff=%ld)\n",
387 size,eff);
388 }
389 words = eff;
390 if (paddr & 15) {
391 unsigned long init;
392
393 init = 4-((paddr & 15) >> 2);
394 if (init > words) init = words;
395 dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
396 (vcc->vci << MID_DMA_VCI_SHIFT);
397 dma[j++] = paddr;
398 paddr += init << 2;
399 words -= init;
400 }
401#ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */
402 if (words & ~15) {
403 dma[j++] = MID_DT_16W | ((words >> 4) <<
404 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
405 MID_DMA_VCI_SHIFT);
406 dma[j++] = paddr;
407 paddr += (words & ~15) << 2;
408 words &= 15;
409 }
410#endif
411#ifdef CONFIG_ATM_ENI_BURST_RX_8W /* works only with *some* PCI chipsets ... */
412 if (words & ~7) {
413 dma[j++] = MID_DT_8W | ((words >> 3) <<
414 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
415 MID_DMA_VCI_SHIFT);
416 dma[j++] = paddr;
417 paddr += (words & ~7) << 2;
418 words &= 7;
419 }
420#endif
421#ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */
422 if (words & ~3) {
423 dma[j++] = MID_DT_4W | ((words >> 2) <<
424 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
425 MID_DMA_VCI_SHIFT);
426 dma[j++] = paddr;
427 paddr += (words & ~3) << 2;
428 words &= 3;
429 }
430#endif
431#ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */
432 if (words & ~1) {
433 dma[j++] = MID_DT_2W | ((words >> 1) <<
434 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
435 MID_DMA_VCI_SHIFT);
436 dma[j++] = paddr;
437 paddr += (words & ~1) << 2;
438 words &= 1;
439 }
440#endif
441 if (words) {
442 dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT)
443 | (vcc->vci << MID_DMA_VCI_SHIFT);
444 dma[j++] = paddr;
445 }
446 }
447 if (size != eff) {
448 dma[j++] = (here << MID_DMA_COUNT_SHIFT) |
449 (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK;
450 j++;
451 }
452 if (!j || j > 2*RX_DMA_BUF) {
453 printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n");
454 goto trouble;
455 }
456 dma[j-2] |= MID_DMA_END;
457 j = j >> 1;
458 dma_wr = eni_in(MID_DMA_WR_RX);
459 dma_rd = eni_in(MID_DMA_RD_RX);
460 /*
461 * Can I move the dma_wr pointer by 2j+1 positions without overwriting
462 * data that hasn't been read (position of dma_rd) yet ?
463 */
464 if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */
465 printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n",
466 vcc->dev->number);
467 goto trouble;
468 }
469 for (i = 0; i < j; i++) {
470 writel(dma[i*2],eni_dev->rx_dma+dma_wr*8);
471 writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4);
472 dma_wr = (dma_wr+1) & (NR_DMA_RX-1);
473 }
474 if (skb) {
475 ENI_PRV_POS(skb) = eni_vcc->descr+size+1;
476 skb_queue_tail(&eni_dev->rx_queue,skb);
477 eni_vcc->last = skb;
478rx_enqueued++;
479 }
480 eni_vcc->descr = here;
481 eni_out(dma_wr,MID_DMA_WR_RX);
482 return 0;
483
484trouble:
485 if (paddr)
486 pci_unmap_single(eni_dev->pci_dev,paddr,skb->len,
487 PCI_DMA_FROMDEVICE);
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 }
719putting++;
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));
748rx_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 pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len,
763 PCI_DMA_TODEVICE);
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 = pci_map_single(eni_dev->pci_dev,skb->data,skb->len,
1117 PCI_DMA_TODEVICE);
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_shinfo(skb)->frags[i].page + skb_shinfo(skb)->frags[i].page_offset,
1138 skb_shinfo(skb)->frags[i].size);
1139 }
1140 if (skb->len & 3)
1141 put_dma(tx->index,eni_dev->dma,&j,zeroes,4-(skb->len & 3));
1142 /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */
1143 eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) <<
1144 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1145 MID_DMA_END | MID_DT_JK;
1146 j++;
1147 DPRINTK("DMA at end: %d\n",j);
1148 /* store frame */
1149 writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) |
1150 (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) |
1151 (tx->resolution << MID_SEG_RATE_SHIFT) |
1152 (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4);
1153/*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/
1154 writel((vcc->vci << MID_SEG_VCI_SHIFT) |
1155 (aal5 ? 0 : (skb->data[3] & 0xf)) |
1156 (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0),
1157 tx->send+((tx->tx_pos+1) & (tx->words-1))*4);
1158 DPRINTK("size: %d, len:%d\n",size,skb->len);
1159 if (aal5)
1160 writel(skb->len,tx->send+
1161 ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4);
1162 j = j >> 1;
1163 for (i = 0; i < j; i++) {
1164 writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8);
1165 writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4);
1166 dma_wr = (dma_wr+1) & (NR_DMA_TX-1);
1167 }
1168 ENI_PRV_POS(skb) = tx->tx_pos;
1169 ENI_PRV_SIZE(skb) = size;
1170 ENI_VCC(vcc)->txing += size;
1171 tx->tx_pos = (tx->tx_pos+size) & (tx->words-1);
1172 DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos);
1173 eni_out(dma_wr,MID_DMA_WR_TX);
1174 skb_queue_tail(&eni_dev->tx_queue,skb);
1175queued++;
1176 return enq_ok;
1177}
1178
1179
1180static void poll_tx(struct atm_dev *dev)
1181{
1182 struct eni_tx *tx;
1183 struct sk_buff *skb;
1184 enum enq_res res;
1185 int i;
1186
1187 DPRINTK(">poll_tx\n");
1188 for (i = NR_CHAN-1; i >= 0; i--) {
1189 tx = &ENI_DEV(dev)->tx[i];
1190 if (tx->send)
1191 while ((skb = skb_dequeue(&tx->backlog))) {
1192 res = do_tx(skb);
1193 if (res == enq_ok) continue;
1194 DPRINTK("re-queuing TX PDU\n");
1195 skb_queue_head(&tx->backlog,skb);
1196requeued++;
1197 if (res == enq_jam) return;
1198 break;
1199 }
1200 }
1201}
1202
1203
1204static void dequeue_tx(struct atm_dev *dev)
1205{
1206 struct eni_dev *eni_dev;
1207 struct atm_vcc *vcc;
1208 struct sk_buff *skb;
1209 struct eni_tx *tx;
1210
1211 NULLCHECK(dev);
1212 eni_dev = ENI_DEV(dev);
1213 NULLCHECK(eni_dev);
1214 while ((skb = skb_dequeue(&eni_dev->tx_queue))) {
1215 vcc = ATM_SKB(skb)->vcc;
1216 NULLCHECK(vcc);
1217 tx = ENI_VCC(vcc)->tx;
1218 NULLCHECK(ENI_VCC(vcc)->tx);
1219 DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb),
1220 (unsigned) eni_in(MID_TX_DESCRSTART(tx->index)));
1221 if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) ==
1222 eni_in(MID_TX_DESCRSTART(tx->index))) {
1223 skb_queue_head(&eni_dev->tx_queue,skb);
1224 break;
1225 }
1226 ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb);
1227 pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len,
1228 PCI_DMA_TODEVICE);
1229 if (vcc->pop) vcc->pop(vcc,skb);
1230 else dev_kfree_skb_irq(skb);
1231 atomic_inc(&vcc->stats->tx);
1232 wake_up(&eni_dev->tx_wait);
1233dma_complete++;
1234 }
1235}
1236
1237
1238static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr)
1239{
1240 int i;
1241
1242 for (i = !ubr; i < NR_CHAN; i++)
1243 if (!eni_dev->tx[i].send) return eni_dev->tx+i;
1244 return NULL;
1245}
1246
1247
1248static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre,
1249 int *res,int unlimited)
1250{
1251 static const int pre_div[] = { 4,16,128,2048 };
1252 /* 2^(((x+2)^2-(x+2))/2+1) */
1253
1254 if (unlimited) *pre = *res = 0;
1255 else {
1256 if (*pcr > 0) {
1257 int div;
1258
1259 for (*pre = 0; *pre < 3; (*pre)++)
1260 if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break;
1261 div = pre_div[*pre]**pcr;
1262 DPRINTK("min div %d\n",div);
1263 *res = TS_CLOCK/div-1;
1264 }
1265 else {
1266 int div;
1267
1268 if (!*pcr) *pcr = eni_dev->tx_bw+reserved;
1269 for (*pre = 3; *pre >= 0; (*pre)--)
1270 if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break;
1271 if (*pre < 3) (*pre)++; /* else fail later */
1272 div = pre_div[*pre]*-*pcr;
1273 DPRINTK("max div %d\n",div);
1274 *res = DIV_ROUND_UP(TS_CLOCK, div)-1;
1275 }
1276 if (*res < 0) *res = 0;
1277 if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE;
1278 }
1279 *pcr = TS_CLOCK/pre_div[*pre]/(*res+1);
1280 DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res);
1281 return 0;
1282}
1283
1284
1285static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp,
1286 int set_rsv,int set_shp)
1287{
1288 struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1289 struct eni_vcc *eni_vcc = ENI_VCC(vcc);
1290 struct eni_tx *tx;
1291 unsigned long size;
1292 void __iomem *mem;
1293 int rate,ubr,unlimited,new_tx;
1294 int pre,res,order;
1295 int error;
1296
1297 rate = atm_pcr_goal(txtp);
1298 ubr = txtp->traffic_class == ATM_UBR;
1299 unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR ||
1300 rate >= ATM_OC3_PCR);
1301 if (!unlimited) {
1302 size = txtp->max_sdu*eni_dev->tx_mult/100;
1303 if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <=
1304 MID_MAX_BUF_SIZE)
1305 size = MID_MAX_BUF_SIZE;
1306 }
1307 else {
1308 if (eni_dev->ubr) {
1309 eni_vcc->tx = eni_dev->ubr;
1310 txtp->pcr = ATM_OC3_PCR;
1311 return 0;
1312 }
1313 size = UBR_BUFFER;
1314 }
1315 new_tx = !eni_vcc->tx;
1316 mem = NULL; /* for gcc */
1317 if (!new_tx) tx = eni_vcc->tx;
1318 else {
1319 mem = eni_alloc_mem(eni_dev,&size);
1320 if (!mem) return -ENOBUFS;
1321 tx = alloc_tx(eni_dev,unlimited);
1322 if (!tx) {
1323 eni_free_mem(eni_dev,mem,size);
1324 return -EBUSY;
1325 }
1326 DPRINTK("got chan %d\n",tx->index);
1327 tx->reserved = tx->shaping = 0;
1328 tx->send = mem;
1329 tx->words = size >> 2;
1330 skb_queue_head_init(&tx->backlog);
1331 for (order = 0; size > (1 << (order+10)); order++);
1332 eni_out((order << MID_SIZE_SHIFT) |
1333 ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)),
1334 MID_TX_PLACE(tx->index));
1335 tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) &
1336 MID_DESCR_START;
1337 }
1338 error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited);
1339 if (!error && txtp->min_pcr > rate) error = -EINVAL;
1340 if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR &&
1341 txtp->max_pcr < rate) error = -EINVAL;
1342 if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved)
1343 error = -EINVAL;
1344 if (!error && set_rsv && !set_shp && rate < tx->shaping)
1345 error = -EINVAL;
1346 if (!error && !set_rsv && rate > tx->reserved && !ubr)
1347 error = -EINVAL;
1348 if (error) {
1349 if (new_tx) {
1350 tx->send = NULL;
1351 eni_free_mem(eni_dev,mem,size);
1352 }
1353 return error;
1354 }
1355 txtp->pcr = rate;
1356 if (set_rsv && !ubr) {
1357 eni_dev->tx_bw += tx->reserved;
1358 tx->reserved = rate;
1359 eni_dev->tx_bw -= rate;
1360 }
1361 if (set_shp || (unlimited && new_tx)) {
1362 if (unlimited && new_tx) eni_dev->ubr = tx;
1363 tx->prescaler = pre;
1364 tx->resolution = res;
1365 tx->shaping = rate;
1366 }
1367 if (set_shp) eni_vcc->tx = tx;
1368 DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping);
1369 return 0;
1370}
1371
1372
1373static int open_tx_first(struct atm_vcc *vcc)
1374{
1375 ENI_VCC(vcc)->tx = NULL;
1376 if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0;
1377 ENI_VCC(vcc)->txing = 0;
1378 return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1);
1379}
1380
1381
1382static int open_tx_second(struct atm_vcc *vcc)
1383{
1384 return 0; /* nothing to do */
1385}
1386
1387
1388static void close_tx(struct atm_vcc *vcc)
1389{
1390 DECLARE_WAITQUEUE(wait,current);
1391 struct eni_dev *eni_dev;
1392 struct eni_vcc *eni_vcc;
1393
1394 eni_vcc = ENI_VCC(vcc);
1395 if (!eni_vcc->tx) return;
1396 eni_dev = ENI_DEV(vcc->dev);
1397 /* wait for TX queue to drain */
1398 DPRINTK("eni_close: waiting for TX ...\n");
1399 add_wait_queue(&eni_dev->tx_wait,&wait);
1400 set_current_state(TASK_UNINTERRUPTIBLE);
1401 for (;;) {
1402 int txing;
1403
1404 tasklet_disable(&eni_dev->task);
1405 txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing;
1406 tasklet_enable(&eni_dev->task);
1407 if (!txing) break;
1408 DPRINTK("%d TX left\n",eni_vcc->txing);
1409 schedule();
1410 set_current_state(TASK_UNINTERRUPTIBLE);
1411 }
1412 set_current_state(TASK_RUNNING);
1413 remove_wait_queue(&eni_dev->tx_wait,&wait);
1414 if (eni_vcc->tx != eni_dev->ubr) {
1415 /*
1416 * Looping a few times in here is probably far cheaper than
1417 * keeping track of TX completions all the time, so let's poll
1418 * a bit ...
1419 */
1420 while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) !=
1421 eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index)))
1422 schedule();
1423 eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2);
1424 eni_vcc->tx->send = NULL;
1425 eni_dev->tx_bw += eni_vcc->tx->reserved;
1426 }
1427 eni_vcc->tx = NULL;
1428}
1429
1430
1431static int start_tx(struct atm_dev *dev)
1432{
1433 struct eni_dev *eni_dev;
1434 int i;
1435
1436 eni_dev = ENI_DEV(dev);
1437 eni_dev->lost = 0;
1438 eni_dev->tx_bw = ATM_OC3_PCR;
1439 eni_dev->tx_mult = DEFAULT_TX_MULT;
1440 init_waitqueue_head(&eni_dev->tx_wait);
1441 eni_dev->ubr = NULL;
1442 skb_queue_head_init(&eni_dev->tx_queue);
1443 eni_out(0,MID_DMA_WR_TX);
1444 for (i = 0; i < NR_CHAN; i++) {
1445 eni_dev->tx[i].send = NULL;
1446 eni_dev->tx[i].index = i;
1447 }
1448 return 0;
1449}
1450
1451
1452/*--------------------------------- common ----------------------------------*/
1453
1454
1455#if 0 /* may become useful again when tuning things */
1456
1457static void foo(void)
1458{
1459printk(KERN_INFO
1460 "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n"
1461 "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n",
1462 tx_complete,dma_complete,queued,requeued,submitted,backlogged,
1463 rx_enqueued,rx_dequeued,putting,pushed);
1464if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost);
1465}
1466
1467#endif
1468
1469
1470static void bug_int(struct atm_dev *dev,unsigned long reason)
1471{
1472 DPRINTK(">bug_int\n");
1473 if (reason & MID_DMA_ERR_ACK)
1474 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1475 "error\n",dev->number);
1476 if (reason & MID_TX_IDENT_MISM)
1477 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident "
1478 "mismatch\n",dev->number);
1479 if (reason & MID_TX_DMA_OVFL)
1480 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1481 "overflow\n",dev->number);
1482 EVENT("---dump ends here---\n",0,0);
1483 printk(KERN_NOTICE "---recent events---\n");
1484 event_dump();
1485}
1486
1487
1488static irqreturn_t eni_int(int irq,void *dev_id)
1489{
1490 struct atm_dev *dev;
1491 struct eni_dev *eni_dev;
1492 u32 reason;
1493
1494 DPRINTK(">eni_int\n");
1495 dev = dev_id;
1496 eni_dev = ENI_DEV(dev);
1497 reason = eni_in(MID_ISA);
1498 DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason);
1499 /*
1500 * Must handle these two right now, because reading ISA doesn't clear
1501 * them, so they re-occur and we never make it to the tasklet. Since
1502 * they're rare, we don't mind the occasional invocation of eni_tasklet
1503 * with eni_dev->events == 0.
1504 */
1505 if (reason & MID_STAT_OVFL) {
1506 EVENT("stat overflow\n",0,0);
1507 eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH;
1508 }
1509 if (reason & MID_SUNI_INT) {
1510 EVENT("SUNI int\n",0,0);
1511 dev->phy->interrupt(dev);
1512#if 0
1513 foo();
1514#endif
1515 }
1516 spin_lock(&eni_dev->lock);
1517 eni_dev->events |= reason;
1518 spin_unlock(&eni_dev->lock);
1519 tasklet_schedule(&eni_dev->task);
1520 return IRQ_HANDLED;
1521}
1522
1523
1524static void eni_tasklet(unsigned long data)
1525{
1526 struct atm_dev *dev = (struct atm_dev *) data;
1527 struct eni_dev *eni_dev = ENI_DEV(dev);
1528 unsigned long flags;
1529 u32 events;
1530
1531 DPRINTK("eni_tasklet (dev %p)\n",dev);
1532 spin_lock_irqsave(&eni_dev->lock,flags);
1533 events = xchg(&eni_dev->events,0);
1534 spin_unlock_irqrestore(&eni_dev->lock,flags);
1535 if (events & MID_RX_DMA_COMPLETE) {
1536 EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0);
1537 dequeue_rx(dev);
1538 EVENT("dequeue_rx done, starting poll_rx\n",0,0);
1539 poll_rx(dev);
1540 EVENT("poll_rx done\n",0,0);
1541 /* poll_tx ? */
1542 }
1543 if (events & MID_SERVICE) {
1544 EVENT("INT: service, starting get_service\n",0,0);
1545 get_service(dev);
1546 EVENT("get_service done, starting poll_rx\n",0,0);
1547 poll_rx(dev);
1548 EVENT("poll_rx done\n",0,0);
1549 }
1550 if (events & MID_TX_DMA_COMPLETE) {
1551 EVENT("INT: TX DMA COMPLETE\n",0,0);
1552 dequeue_tx(dev);
1553 }
1554 if (events & MID_TX_COMPLETE) {
1555 EVENT("INT: TX COMPLETE\n",0,0);
1556tx_complete++;
1557 wake_up(&eni_dev->tx_wait);
1558 /* poll_rx ? */
1559 }
1560 if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) {
1561 EVENT("bug interrupt\n",0,0);
1562 bug_int(dev,events);
1563 }
1564 poll_tx(dev);
1565}
1566
1567
1568/*--------------------------------- entries ---------------------------------*/
1569
1570
1571static const char *media_name[] __devinitdata = {
1572 "MMF", "SMF", "MMF", "03?", /* 0- 3 */
1573 "UTP", "05?", "06?", "07?", /* 4- 7 */
1574 "TAXI","09?", "10?", "11?", /* 8-11 */
1575 "12?", "13?", "14?", "15?", /* 12-15 */
1576 "MMF", "SMF", "18?", "19?", /* 16-19 */
1577 "UTP", "21?", "22?", "23?", /* 20-23 */
1578 "24?", "25?", "26?", "27?", /* 24-27 */
1579 "28?", "29?", "30?", "31?" /* 28-31 */
1580};
1581
1582
1583#define SET_SEPROM \
1584 ({ if (!error && !pci_error) { \
1585 pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \
1586 udelay(10); /* 10 usecs */ \
1587 } })
1588#define GET_SEPROM \
1589 ({ if (!error && !pci_error) { \
1590 pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \
1591 udelay(10); /* 10 usecs */ \
1592 } })
1593
1594
1595static int __devinit get_esi_asic(struct atm_dev *dev)
1596{
1597 struct eni_dev *eni_dev;
1598 unsigned char tonga;
1599 int error,failed,pci_error;
1600 int address,i,j;
1601
1602 eni_dev = ENI_DEV(dev);
1603 error = pci_error = 0;
1604 tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK;
1605 SET_SEPROM;
1606 for (i = 0; i < ESI_LEN && !error && !pci_error; i++) {
1607 /* start operation */
1608 tonga |= SEPROM_DATA;
1609 SET_SEPROM;
1610 tonga |= SEPROM_CLK;
1611 SET_SEPROM;
1612 tonga &= ~SEPROM_DATA;
1613 SET_SEPROM;
1614 tonga &= ~SEPROM_CLK;
1615 SET_SEPROM;
1616 /* send address */
1617 address = ((i+SEPROM_ESI_BASE) << 1)+1;
1618 for (j = 7; j >= 0; j--) {
1619 tonga = (address >> j) & 1 ? tonga | SEPROM_DATA :
1620 tonga & ~SEPROM_DATA;
1621 SET_SEPROM;
1622 tonga |= SEPROM_CLK;
1623 SET_SEPROM;
1624 tonga &= ~SEPROM_CLK;
1625 SET_SEPROM;
1626 }
1627 /* get ack */
1628 tonga |= SEPROM_DATA;
1629 SET_SEPROM;
1630 tonga |= SEPROM_CLK;
1631 SET_SEPROM;
1632 GET_SEPROM;
1633 failed = tonga & SEPROM_DATA;
1634 tonga &= ~SEPROM_CLK;
1635 SET_SEPROM;
1636 tonga |= SEPROM_DATA;
1637 SET_SEPROM;
1638 if (failed) error = -EIO;
1639 else {
1640 dev->esi[i] = 0;
1641 for (j = 7; j >= 0; j--) {
1642 dev->esi[i] <<= 1;
1643 tonga |= SEPROM_DATA;
1644 SET_SEPROM;
1645 tonga |= SEPROM_CLK;
1646 SET_SEPROM;
1647 GET_SEPROM;
1648 if (tonga & SEPROM_DATA) dev->esi[i] |= 1;
1649 tonga &= ~SEPROM_CLK;
1650 SET_SEPROM;
1651 tonga |= SEPROM_DATA;
1652 SET_SEPROM;
1653 }
1654 /* get ack */
1655 tonga |= SEPROM_DATA;
1656 SET_SEPROM;
1657 tonga |= SEPROM_CLK;
1658 SET_SEPROM;
1659 GET_SEPROM;
1660 if (!(tonga & SEPROM_DATA)) error = -EIO;
1661 tonga &= ~SEPROM_CLK;
1662 SET_SEPROM;
1663 tonga |= SEPROM_DATA;
1664 SET_SEPROM;
1665 }
1666 /* stop operation */
1667 tonga &= ~SEPROM_DATA;
1668 SET_SEPROM;
1669 tonga |= SEPROM_CLK;
1670 SET_SEPROM;
1671 tonga |= SEPROM_DATA;
1672 SET_SEPROM;
1673 }
1674 if (pci_error) {
1675 printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI "
1676 "(0x%02x)\n",dev->number,pci_error);
1677 error = -EIO;
1678 }
1679 return error;
1680}
1681
1682
1683#undef SET_SEPROM
1684#undef GET_SEPROM
1685
1686
1687static int __devinit get_esi_fpga(struct atm_dev *dev, void __iomem *base)
1688{
1689 void __iomem *mac_base;
1690 int i;
1691
1692 mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom);
1693 for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3));
1694 return 0;
1695}
1696
1697
1698static int __devinit eni_do_init(struct atm_dev *dev)
1699{
1700 struct midway_eprom __iomem *eprom;
1701 struct eni_dev *eni_dev;
1702 struct pci_dev *pci_dev;
1703 unsigned long real_base;
1704 void __iomem *base;
1705 int error,i,last;
1706
1707 DPRINTK(">eni_init\n");
1708 dev->ci_range.vpi_bits = 0;
1709 dev->ci_range.vci_bits = NR_VCI_LD;
1710 dev->link_rate = ATM_OC3_PCR;
1711 eni_dev = ENI_DEV(dev);
1712 pci_dev = eni_dev->pci_dev;
1713 real_base = pci_resource_start(pci_dev, 0);
1714 eni_dev->irq = pci_dev->irq;
1715 if ((error = pci_write_config_word(pci_dev,PCI_COMMAND,
1716 PCI_COMMAND_MEMORY |
1717 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1718 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory "
1719 "(0x%02x)\n",dev->number,error);
1720 return -EIO;
1721 }
1722 printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,",
1723 dev->number,pci_dev->revision,real_base,eni_dev->irq);
1724 if (!(base = ioremap_nocache(real_base,MAP_MAX_SIZE))) {
1725 printk("\n");
1726 printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page "
1727 "mapping\n",dev->number);
1728 return error;
1729 }
1730 eni_dev->base_diff = real_base - (unsigned long) base;
1731 /* id may not be present in ASIC Tonga boards - check this @@@ */
1732 if (!eni_dev->asic) {
1733 eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom));
1734 if (readl(&eprom->magic) != ENI155_MAGIC) {
1735 printk("\n");
1736 printk(KERN_ERR DEV_LABEL
1737 "(itf %d): bad magic - expected 0x%x, got 0x%x\n",
1738 dev->number, ENI155_MAGIC,
1739 (unsigned)readl(&eprom->magic));
1740 error = -EINVAL;
1741 goto unmap;
1742 }
1743 }
1744 eni_dev->phy = base+PHY_BASE;
1745 eni_dev->reg = base+REG_BASE;
1746 eni_dev->ram = base+RAM_BASE;
1747 last = MAP_MAX_SIZE-RAM_BASE;
1748 for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) {
1749 writel(0x55555555,eni_dev->ram+i);
1750 if (readl(eni_dev->ram+i) != 0x55555555) last = i;
1751 else {
1752 writel(0xAAAAAAAA,eni_dev->ram+i);
1753 if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i;
1754 else writel(i,eni_dev->ram+i);
1755 }
1756 }
1757 for (i = 0; i < last; i += RAM_INCREMENT)
1758 if (readl(eni_dev->ram+i) != i) break;
1759 eni_dev->mem = i;
1760 memset_io(eni_dev->ram,0,eni_dev->mem);
1761 /* TODO: should shrink allocation now */
1762 printk("mem=%dkB (",eni_dev->mem >> 10);
1763 /* TODO: check for non-SUNI, check for TAXI ? */
1764 if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) {
1765 printk(")\n");
1766 printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n",
1767 dev->number,(unsigned) eni_in(MID_RES_ID_MCON));
1768 error = -EINVAL;
1769 goto unmap;
1770 }
1771 error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base);
1772 if (error)
1773 goto unmap;
1774 for (i = 0; i < ESI_LEN; i++)
1775 printk("%s%02X",i ? "-" : "",dev->esi[i]);
1776 printk(")\n");
1777 printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number,
1778 eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA",
1779 media_name[eni_in(MID_RES_ID_MCON) & DAUGTHER_ID]);
1780
1781 error = suni_init(dev);
1782 if (error)
1783 goto unmap;
1784out:
1785 return error;
1786unmap:
1787 iounmap(base);
1788 goto out;
1789}
1790
1791
1792static int __devinit eni_start(struct atm_dev *dev)
1793{
1794 struct eni_dev *eni_dev;
1795
1796 void __iomem *buf;
1797 unsigned long buffer_mem;
1798 int error;
1799
1800 DPRINTK(">eni_start\n");
1801 eni_dev = ENI_DEV(dev);
1802 if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) {
1803 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
1804 dev->number,eni_dev->irq);
1805 error = -EAGAIN;
1806 goto out;
1807 }
1808 pci_set_master(eni_dev->pci_dev);
1809 if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND,
1810 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
1811 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1812 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+"
1813 "master (0x%02x)\n",dev->number,error);
1814 goto free_irq;
1815 }
1816 if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,
1817 END_SWAP_DMA))) {
1818 printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap "
1819 "(0x%02x)\n",dev->number,error);
1820 goto free_irq;
1821 }
1822 /* determine addresses of internal tables */
1823 eni_dev->vci = eni_dev->ram;
1824 eni_dev->rx_dma = eni_dev->ram+NR_VCI*16;
1825 eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8;
1826 eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8;
1827 buf = eni_dev->service+NR_SERVICE*4;
1828 DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n",
1829 eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma,
1830 eni_dev->service,buf);
1831 spin_lock_init(&eni_dev->lock);
1832 tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev);
1833 eni_dev->events = 0;
1834 /* initialize memory management */
1835 buffer_mem = eni_dev->mem - (buf - eni_dev->ram);
1836 eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2;
1837 eni_dev->free_list = kmalloc(
1838 sizeof(struct eni_free)*(eni_dev->free_list_size+1),GFP_KERNEL);
1839 if (!eni_dev->free_list) {
1840 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
1841 dev->number);
1842 error = -ENOMEM;
1843 goto free_irq;
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) goto free_list;
1860 error = start_rx(dev);
1861 if (error) goto free_list;
1862 error = dev->phy->start(dev);
1863 if (error) goto free_list;
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
1871free_list:
1872 kfree(eni_dev->free_list);
1873
1874free_irq:
1875 free_irq(eni_dev->irq, eni_dev);
1876
1877out:
1878 return error;
1879}
1880
1881
1882static void eni_close(struct atm_vcc *vcc)
1883{
1884 DPRINTK(">eni_close\n");
1885 if (!ENI_VCC(vcc)) return;
1886 clear_bit(ATM_VF_READY,&vcc->flags);
1887 close_rx(vcc);
1888 close_tx(vcc);
1889 DPRINTK("eni_close: done waiting\n");
1890 /* deallocate memory */
1891 kfree(ENI_VCC(vcc));
1892 vcc->dev_data = NULL;
1893 clear_bit(ATM_VF_ADDR,&vcc->flags);
1894 /*foo();*/
1895}
1896
1897
1898static int eni_open(struct atm_vcc *vcc)
1899{
1900 struct eni_vcc *eni_vcc;
1901 int error;
1902 short vpi = vcc->vpi;
1903 int vci = vcc->vci;
1904
1905 DPRINTK(">eni_open\n");
1906 EVENT("eni_open\n",0,0);
1907 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1908 vcc->dev_data = NULL;
1909 if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
1910 set_bit(ATM_VF_ADDR,&vcc->flags);
1911 if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5)
1912 return -EINVAL;
1913 DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi,
1914 vcc->vci);
1915 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
1916 eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL);
1917 if (!eni_vcc) return -ENOMEM;
1918 vcc->dev_data = eni_vcc;
1919 eni_vcc->tx = NULL; /* for eni_close after open_rx */
1920 if ((error = open_rx_first(vcc))) {
1921 eni_close(vcc);
1922 return error;
1923 }
1924 if ((error = open_tx_first(vcc))) {
1925 eni_close(vcc);
1926 return error;
1927 }
1928 }
1929 if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0;
1930 if ((error = open_rx_second(vcc))) {
1931 eni_close(vcc);
1932 return error;
1933 }
1934 if ((error = open_tx_second(vcc))) {
1935 eni_close(vcc);
1936 return error;
1937 }
1938 set_bit(ATM_VF_READY,&vcc->flags);
1939 /* should power down SUNI while !ref_count @@@ */
1940 return 0;
1941}
1942
1943
1944static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs)
1945{
1946 struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1947 struct eni_tx *tx = ENI_VCC(vcc)->tx;
1948 struct sk_buff *skb;
1949 int error,rate,rsv,shp;
1950
1951 if (qos->txtp.traffic_class == ATM_NONE) return 0;
1952 if (tx == eni_dev->ubr) return -EBADFD;
1953 rate = atm_pcr_goal(&qos->txtp);
1954 if (rate < 0) rate = -rate;
1955 rsv = shp = 0;
1956 if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1;
1957 if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1;
1958 if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1;
1959 if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1;
1960 if (!rsv && !shp) return 0;
1961 error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp);
1962 if (error) return error;
1963 if (shp && !(flgs & ATM_MF_IMMED)) return 0;
1964 /*
1965 * Walk through the send buffer and patch the rate information in all
1966 * segmentation buffer descriptors of this VCC.
1967 */
1968 tasklet_disable(&eni_dev->task);
1969 skb_queue_walk(&eni_dev->tx_queue, skb) {
1970 void __iomem *dsc;
1971
1972 if (ATM_SKB(skb)->vcc != vcc) continue;
1973 dsc = tx->send+ENI_PRV_POS(skb)*4;
1974 writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) |
1975 (tx->prescaler << MID_SEG_PR_SHIFT) |
1976 (tx->resolution << MID_SEG_RATE_SHIFT), dsc);
1977 }
1978 tasklet_enable(&eni_dev->task);
1979 return 0;
1980}
1981
1982
1983static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
1984{
1985 struct eni_dev *eni_dev = ENI_DEV(dev);
1986
1987 if (cmd == ENI_MEMDUMP) {
1988 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1989 printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d "
1990 "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number);
1991 dump(dev);
1992 return 0;
1993 }
1994 if (cmd == ENI_SETMULT) {
1995 struct eni_multipliers mult;
1996
1997 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1998 if (copy_from_user(&mult, arg,
1999 sizeof(struct eni_multipliers)))
2000 return -EFAULT;
2001 if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) ||
2002 mult.tx > 65536 || mult.rx > 65536)
2003 return -EINVAL;
2004 if (mult.tx) eni_dev->tx_mult = mult.tx;
2005 if (mult.rx) eni_dev->rx_mult = mult.rx;
2006 return 0;
2007 }
2008 if (cmd == ATM_SETCIRANGE) {
2009 struct atm_cirange ci;
2010
2011 if (copy_from_user(&ci, arg,sizeof(struct atm_cirange)))
2012 return -EFAULT;
2013 if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) &&
2014 (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX))
2015 return 0;
2016 return -EINVAL;
2017 }
2018 if (!dev->phy->ioctl) return -ENOIOCTLCMD;
2019 return dev->phy->ioctl(dev,cmd,arg);
2020}
2021
2022
2023static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname,
2024 void __user *optval,int optlen)
2025{
2026 return -EINVAL;
2027}
2028
2029
2030static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname,
2031 void __user *optval,unsigned int optlen)
2032{
2033 return -EINVAL;
2034}
2035
2036
2037static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb)
2038{
2039 enum enq_res res;
2040
2041 DPRINTK(">eni_send\n");
2042 if (!ENI_VCC(vcc)->tx) {
2043 if (vcc->pop) vcc->pop(vcc,skb);
2044 else dev_kfree_skb(skb);
2045 return -EINVAL;
2046 }
2047 if (!skb) {
2048 printk(KERN_CRIT "!skb in eni_send ?\n");
2049 if (vcc->pop) vcc->pop(vcc,skb);
2050 return -EINVAL;
2051 }
2052 if (vcc->qos.aal == ATM_AAL0) {
2053 if (skb->len != ATM_CELL_SIZE-1) {
2054 if (vcc->pop) vcc->pop(vcc,skb);
2055 else dev_kfree_skb(skb);
2056 return -EINVAL;
2057 }
2058 *(u32 *) skb->data = htonl(*(u32 *) skb->data);
2059 }
2060submitted++;
2061 ATM_SKB(skb)->vcc = vcc;
2062 tasklet_disable(&ENI_DEV(vcc->dev)->task);
2063 res = do_tx(skb);
2064 tasklet_enable(&ENI_DEV(vcc->dev)->task);
2065 if (res == enq_ok) return 0;
2066 skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb);
2067backlogged++;
2068 tasklet_schedule(&ENI_DEV(vcc->dev)->task);
2069 return 0;
2070}
2071
2072static void eni_phy_put(struct atm_dev *dev,unsigned char value,
2073 unsigned long addr)
2074{
2075 writel(value,ENI_DEV(dev)->phy+addr*4);
2076}
2077
2078
2079
2080static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr)
2081{
2082 return readl(ENI_DEV(dev)->phy+addr*4);
2083}
2084
2085
2086static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page)
2087{
2088 struct hlist_node *node;
2089 struct sock *s;
2090 static const char *signal[] = { "LOST","unknown","okay" };
2091 struct eni_dev *eni_dev = ENI_DEV(dev);
2092 struct atm_vcc *vcc;
2093 int left,i;
2094
2095 left = *pos;
2096 if (!left)
2097 return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, "
2098 "%d cps remaining\n",dev->number,signal[(int) dev->signal],
2099 eni_dev->mem >> 10,eni_dev->tx_bw);
2100 if (!--left)
2101 return sprintf(page,"%4sBursts: TX"
2102#if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \
2103 !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \
2104 !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \
2105 !defined(CONFIG_ATM_ENI_BURST_TX_2W)
2106 " none"
2107#endif
2108#ifdef CONFIG_ATM_ENI_BURST_TX_16W
2109 " 16W"
2110#endif
2111#ifdef CONFIG_ATM_ENI_BURST_TX_8W
2112 " 8W"
2113#endif
2114#ifdef CONFIG_ATM_ENI_BURST_TX_4W
2115 " 4W"
2116#endif
2117#ifdef CONFIG_ATM_ENI_BURST_TX_2W
2118 " 2W"
2119#endif
2120 ", RX"
2121#if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \
2122 !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \
2123 !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \
2124 !defined(CONFIG_ATM_ENI_BURST_RX_2W)
2125 " none"
2126#endif
2127#ifdef CONFIG_ATM_ENI_BURST_RX_16W
2128 " 16W"
2129#endif
2130#ifdef CONFIG_ATM_ENI_BURST_RX_8W
2131 " 8W"
2132#endif
2133#ifdef CONFIG_ATM_ENI_BURST_RX_4W
2134 " 4W"
2135#endif
2136#ifdef CONFIG_ATM_ENI_BURST_RX_2W
2137 " 2W"
2138#endif
2139#ifndef CONFIG_ATM_ENI_TUNE_BURST
2140 " (default)"
2141#endif
2142 "\n","");
2143 if (!--left)
2144 return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n",
2145 "",eni_dev->tx_mult,eni_dev->rx_mult);
2146 for (i = 0; i < NR_CHAN; i++) {
2147 struct eni_tx *tx = eni_dev->tx+i;
2148
2149 if (!tx->send) continue;
2150 if (!--left) {
2151 return sprintf(page,"tx[%d]: 0x%ld-0x%ld "
2152 "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i,
2153 (unsigned long) (tx->send - eni_dev->ram),
2154 tx->send-eni_dev->ram+tx->words*4-1,tx->words*4,
2155 tx->reserved,tx->shaping,
2156 tx == eni_dev->ubr ? " (UBR)" : "");
2157 }
2158 if (--left) continue;
2159 return sprintf(page,"%10sbacklog %u packets\n","",
2160 skb_queue_len(&tx->backlog));
2161 }
2162 read_lock(&vcc_sklist_lock);
2163 for(i = 0; i < VCC_HTABLE_SIZE; ++i) {
2164 struct hlist_head *head = &vcc_hash[i];
2165
2166 sk_for_each(s, node, head) {
2167 struct eni_vcc *eni_vcc;
2168 int length;
2169
2170 vcc = atm_sk(s);
2171 if (vcc->dev != dev)
2172 continue;
2173 eni_vcc = ENI_VCC(vcc);
2174 if (--left) continue;
2175 length = sprintf(page,"vcc %4d: ",vcc->vci);
2176 if (eni_vcc->rx) {
2177 length += sprintf(page+length,"0x%ld-0x%ld "
2178 "(%6ld bytes)",
2179 (unsigned long) (eni_vcc->recv - eni_dev->ram),
2180 eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1,
2181 eni_vcc->words*4);
2182 if (eni_vcc->tx) length += sprintf(page+length,", ");
2183 }
2184 if (eni_vcc->tx)
2185 length += sprintf(page+length,"tx[%d], txing %d bytes",
2186 eni_vcc->tx->index,eni_vcc->txing);
2187 page[length] = '\n';
2188 read_unlock(&vcc_sklist_lock);
2189 return length+1;
2190 }
2191 }
2192 read_unlock(&vcc_sklist_lock);
2193 for (i = 0; i < eni_dev->free_len; i++) {
2194 struct eni_free *fe = eni_dev->free_list+i;
2195 unsigned long offset;
2196
2197 if (--left) continue;
2198 offset = (unsigned long) eni_dev->ram+eni_dev->base_diff;
2199 return sprintf(page,"free %p-%p (%6d bytes)\n",
2200 fe->start-offset,fe->start-offset+(1 << fe->order)-1,
2201 1 << fe->order);
2202 }
2203 return 0;
2204}
2205
2206
2207static const struct atmdev_ops ops = {
2208 .open = eni_open,
2209 .close = eni_close,
2210 .ioctl = eni_ioctl,
2211 .getsockopt = eni_getsockopt,
2212 .setsockopt = eni_setsockopt,
2213 .send = eni_send,
2214 .phy_put = eni_phy_put,
2215 .phy_get = eni_phy_get,
2216 .change_qos = eni_change_qos,
2217 .proc_read = eni_proc_read
2218};
2219
2220
2221static int __devinit eni_init_one(struct pci_dev *pci_dev,
2222 const struct pci_device_id *ent)
2223{
2224 struct atm_dev *dev;
2225 struct eni_dev *eni_dev;
2226 int error = -ENOMEM;
2227
2228 DPRINTK("eni_init_one\n");
2229
2230 if (pci_enable_device(pci_dev)) {
2231 error = -EIO;
2232 goto out0;
2233 }
2234
2235 eni_dev = kmalloc(sizeof(struct eni_dev),GFP_KERNEL);
2236 if (!eni_dev) goto out0;
2237 if (!cpu_zeroes) {
2238 cpu_zeroes = pci_alloc_consistent(pci_dev,ENI_ZEROES_SIZE,
2239 &zeroes);
2240 if (!cpu_zeroes) goto out1;
2241 }
2242 dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL);
2243 if (!dev) goto out2;
2244 pci_set_drvdata(pci_dev, dev);
2245 eni_dev->pci_dev = pci_dev;
2246 dev->dev_data = eni_dev;
2247 eni_dev->asic = ent->driver_data;
2248 error = eni_do_init(dev);
2249 if (error) goto out3;
2250 error = eni_start(dev);
2251 if (error) goto out3;
2252 eni_dev->more = eni_boards;
2253 eni_boards = dev;
2254 return 0;
2255out3:
2256 atm_dev_deregister(dev);
2257out2:
2258 pci_free_consistent(eni_dev->pci_dev,ENI_ZEROES_SIZE,cpu_zeroes,zeroes);
2259 cpu_zeroes = NULL;
2260out1:
2261 kfree(eni_dev);
2262out0:
2263 return error;
2264}
2265
2266
2267static struct pci_device_id eni_pci_tbl[] = {
2268 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_FPGA), 0 /* FPGA */ },
2269 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_ASIC), 1 /* ASIC */ },
2270 { 0, }
2271};
2272MODULE_DEVICE_TABLE(pci,eni_pci_tbl);
2273
2274
2275static void __devexit eni_remove_one(struct pci_dev *pci_dev)
2276{
2277 /* grrr */
2278}
2279
2280
2281static struct pci_driver eni_driver = {
2282 .name = DEV_LABEL,
2283 .id_table = eni_pci_tbl,
2284 .probe = eni_init_one,
2285 .remove = __devexit_p(eni_remove_one),
2286};
2287
2288
2289static int __init eni_init(void)
2290{
2291 struct sk_buff *skb; /* dummy for sizeof */
2292
2293 if (sizeof(skb->cb) < sizeof(struct eni_skb_prv)) {
2294 printk(KERN_ERR "eni_detect: skb->cb is too small (%Zd < %Zd)\n",
2295 sizeof(skb->cb),sizeof(struct eni_skb_prv));
2296 return -EIO;
2297 }
2298 return pci_register_driver(&eni_driver);
2299}
2300
2301
2302module_init(eni_init);
2303/* @@@ since exit routine not defined, this module can not be unloaded */
2304
2305MODULE_LICENSE("GPL");
1/* drivers/atm/eni.c - Efficient Networks ENI155P device driver */
2
3/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
4
5
6#include <linux/module.h>
7#include <linux/kernel.h>
8#include <linux/mm.h>
9#include <linux/pci.h>
10#include <linux/errno.h>
11#include <linux/atm.h>
12#include <linux/atmdev.h>
13#include <linux/sonet.h>
14#include <linux/skbuff.h>
15#include <linux/time.h>
16#include <linux/delay.h>
17#include <linux/uio.h>
18#include <linux/init.h>
19#include <linux/atm_eni.h>
20#include <linux/bitops.h>
21#include <linux/slab.h>
22#include <asm/io.h>
23#include <linux/atomic.h>
24#include <asm/uaccess.h>
25#include <asm/string.h>
26#include <asm/byteorder.h>
27
28#include "tonga.h"
29#include "midway.h"
30#include "suni.h"
31#include "eni.h"
32
33#if !defined(__i386__) && !defined(__x86_64__)
34#ifndef ioremap_nocache
35#define ioremap_nocache(X,Y) ioremap(X,Y)
36#endif
37#endif
38
39/*
40 * TODO:
41 *
42 * Show stoppers
43 * none
44 *
45 * Minor
46 * - OAM support
47 * - fix bugs listed below
48 */
49
50/*
51 * KNOWN BUGS:
52 *
53 * - may run into JK-JK bug and deadlock
54 * - should allocate UBR channel first
55 * - buffer space allocation algorithm is stupid
56 * (RX: should be maxSDU+maxdelay*rate
57 * TX: should be maxSDU+min(maxSDU,maxdelay*rate) )
58 * - doesn't support OAM cells
59 * - eni_put_free may hang if not putting memory fragments that _complete_
60 * 2^n block (never happens in real life, though)
61 */
62
63
64#if 0
65#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
66#else
67#define DPRINTK(format,args...)
68#endif
69
70
71#ifndef CONFIG_ATM_ENI_TUNE_BURST
72#define CONFIG_ATM_ENI_BURST_TX_8W
73#define CONFIG_ATM_ENI_BURST_RX_4W
74#endif
75
76
77#ifndef CONFIG_ATM_ENI_DEBUG
78
79
80#define NULLCHECK(x)
81
82#define EVENT(s,a,b)
83
84
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 DPRINTK("trying: %ld->%d\n",*size,order);
246 best_order = 65; /* we don't have more than 2^64 of anything ... */
247 index = 0; /* silence GCC */
248 for (i = 0; i < len; i++)
249 if (list[i].order == order) {
250 best_order = order;
251 index = i;
252 break;
253 }
254 else if (best_order > list[i].order && list[i].order > order) {
255 best_order = list[i].order;
256 index = i;
257 }
258 if (best_order == 65) return NULL;
259 start = list[index].start-eni_dev->base_diff;
260 list[index] = list[--len];
261 eni_dev->free_len = len;
262 *size = 1 << order;
263 eni_put_free(eni_dev,start+*size,(1 << best_order)-*size);
264 DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start);
265 memset_io(start,0,*size); /* never leak data */
266 /*dump_mem(eni_dev);*/
267 return start;
268}
269
270
271static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start,
272 unsigned long size)
273{
274 struct eni_free *list;
275 int len,i,order;
276
277 start += eni_dev->base_diff;
278 list = eni_dev->free_list;
279 len = eni_dev->free_len;
280 for (order = -1; size; order++) size >>= 1;
281 DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order);
282 for (i = 0; i < len; i++)
283 if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) &&
284 list[i].order == order) {
285 DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i,
286 list[i].start,start,1 << order,list[i].order,order);
287 list[i] = list[--len];
288 start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order));
289 order++;
290 i = -1;
291 continue;
292 }
293 if (len >= eni_dev->free_list_size) {
294 printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start,
295 order);
296 return;
297 }
298 list[len].start = start;
299 list[len].order = order;
300 eni_dev->free_len = len+1;
301 /*dump_mem(eni_dev);*/
302}
303
304
305/*----------------------------------- RX ------------------------------------*/
306
307
308#define ENI_VCC_NOS ((struct atm_vcc *) 1)
309
310
311static void rx_ident_err(struct atm_vcc *vcc)
312{
313 struct atm_dev *dev;
314 struct eni_dev *eni_dev;
315 struct eni_vcc *eni_vcc;
316
317 dev = vcc->dev;
318 eni_dev = ENI_DEV(dev);
319 /* immediately halt adapter */
320 eni_out(eni_in(MID_MC_S) &
321 ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S);
322 /* dump useful information */
323 eni_vcc = ENI_VCC(vcc);
324 printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident "
325 "mismatch\n",dev->number);
326 printk(KERN_ALERT " VCI %d, rxing %d, words %ld\n",vcc->vci,
327 eni_vcc->rxing,eni_vcc->words);
328 printk(KERN_ALERT " host descr 0x%lx, rx pos 0x%lx, descr value "
329 "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos,
330 (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4));
331 printk(KERN_ALERT " last %p, servicing %d\n",eni_vcc->last,
332 eni_vcc->servicing);
333 EVENT("---dump ends here---\n",0,0);
334 printk(KERN_NOTICE "---recent events---\n");
335 event_dump();
336 ENI_DEV(dev)->fast = NULL; /* really stop it */
337 ENI_DEV(dev)->slow = NULL;
338 skb_queue_head_init(&ENI_DEV(dev)->rx_queue);
339}
340
341
342static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb,
343 unsigned long skip,unsigned long size,unsigned long eff)
344{
345 struct eni_dev *eni_dev;
346 struct eni_vcc *eni_vcc;
347 u32 dma_rd,dma_wr;
348 u32 dma[RX_DMA_BUF*2];
349 dma_addr_t paddr;
350 unsigned long here;
351 int i,j;
352
353 eni_dev = ENI_DEV(vcc->dev);
354 eni_vcc = ENI_VCC(vcc);
355 paddr = 0; /* GCC, shut up */
356 if (skb) {
357 paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len,
358 PCI_DMA_FROMDEVICE);
359 ENI_PRV_PADDR(skb) = paddr;
360 if (paddr & 3)
361 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has "
362 "mis-aligned RX data (0x%lx)\n",vcc->dev->number,
363 vcc->vci,(unsigned long) paddr);
364 ENI_PRV_SIZE(skb) = size+skip;
365 /* PDU plus descriptor */
366 ATM_SKB(skb)->vcc = vcc;
367 }
368 j = 0;
369 if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */
370 here = (eni_vcc->descr+skip) & (eni_vcc->words-1);
371 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci
372 << MID_DMA_VCI_SHIFT) | MID_DT_JK;
373 j++;
374 }
375 here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1);
376 if (!eff) size += skip;
377 else {
378 unsigned long words;
379
380 if (!size) {
381 DPRINTK("strange things happen ...\n");
382 EVENT("strange things happen ... (skip=%ld,eff=%ld)\n",
383 size,eff);
384 }
385 words = eff;
386 if (paddr & 15) {
387 unsigned long init;
388
389 init = 4-((paddr & 15) >> 2);
390 if (init > words) init = words;
391 dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
392 (vcc->vci << MID_DMA_VCI_SHIFT);
393 dma[j++] = paddr;
394 paddr += init << 2;
395 words -= init;
396 }
397#ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */
398 if (words & ~15) {
399 dma[j++] = MID_DT_16W | ((words >> 4) <<
400 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
401 MID_DMA_VCI_SHIFT);
402 dma[j++] = paddr;
403 paddr += (words & ~15) << 2;
404 words &= 15;
405 }
406#endif
407#ifdef CONFIG_ATM_ENI_BURST_RX_8W /* works only with *some* PCI chipsets ... */
408 if (words & ~7) {
409 dma[j++] = MID_DT_8W | ((words >> 3) <<
410 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
411 MID_DMA_VCI_SHIFT);
412 dma[j++] = paddr;
413 paddr += (words & ~7) << 2;
414 words &= 7;
415 }
416#endif
417#ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */
418 if (words & ~3) {
419 dma[j++] = MID_DT_4W | ((words >> 2) <<
420 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
421 MID_DMA_VCI_SHIFT);
422 dma[j++] = paddr;
423 paddr += (words & ~3) << 2;
424 words &= 3;
425 }
426#endif
427#ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */
428 if (words & ~1) {
429 dma[j++] = MID_DT_2W | ((words >> 1) <<
430 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
431 MID_DMA_VCI_SHIFT);
432 dma[j++] = paddr;
433 paddr += (words & ~1) << 2;
434 words &= 1;
435 }
436#endif
437 if (words) {
438 dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT)
439 | (vcc->vci << MID_DMA_VCI_SHIFT);
440 dma[j++] = paddr;
441 }
442 }
443 if (size != eff) {
444 dma[j++] = (here << MID_DMA_COUNT_SHIFT) |
445 (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK;
446 j++;
447 }
448 if (!j || j > 2*RX_DMA_BUF) {
449 printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n");
450 goto trouble;
451 }
452 dma[j-2] |= MID_DMA_END;
453 j = j >> 1;
454 dma_wr = eni_in(MID_DMA_WR_RX);
455 dma_rd = eni_in(MID_DMA_RD_RX);
456 /*
457 * Can I move the dma_wr pointer by 2j+1 positions without overwriting
458 * data that hasn't been read (position of dma_rd) yet ?
459 */
460 if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */
461 printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n",
462 vcc->dev->number);
463 goto trouble;
464 }
465 for (i = 0; i < j; i++) {
466 writel(dma[i*2],eni_dev->rx_dma+dma_wr*8);
467 writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4);
468 dma_wr = (dma_wr+1) & (NR_DMA_RX-1);
469 }
470 if (skb) {
471 ENI_PRV_POS(skb) = eni_vcc->descr+size+1;
472 skb_queue_tail(&eni_dev->rx_queue,skb);
473 eni_vcc->last = skb;
474rx_enqueued++;
475 }
476 eni_vcc->descr = here;
477 eni_out(dma_wr,MID_DMA_WR_RX);
478 return 0;
479
480trouble:
481 if (paddr)
482 pci_unmap_single(eni_dev->pci_dev,paddr,skb->len,
483 PCI_DMA_FROMDEVICE);
484 if (skb) dev_kfree_skb_irq(skb);
485 return -1;
486}
487
488
489static void discard(struct atm_vcc *vcc,unsigned long size)
490{
491 struct eni_vcc *eni_vcc;
492
493 eni_vcc = ENI_VCC(vcc);
494 EVENT("discard (size=%ld)\n",size,0);
495 while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0);
496 /* could do a full fallback, but that might be more expensive */
497 if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1;
498 else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1);
499}
500
501
502/*
503 * TODO: should check whether direct copies (without DMA setup, dequeuing on
504 * interrupt, etc.) aren't much faster for AAL0
505 */
506
507static int rx_aal0(struct atm_vcc *vcc)
508{
509 struct eni_vcc *eni_vcc;
510 unsigned long descr;
511 unsigned long length;
512 struct sk_buff *skb;
513
514 DPRINTK(">rx_aal0\n");
515 eni_vcc = ENI_VCC(vcc);
516 descr = readl(eni_vcc->recv+eni_vcc->descr*4);
517 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
518 rx_ident_err(vcc);
519 return 1;
520 }
521 if (descr & MID_RED_T) {
522 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
523 vcc->dev->number);
524 length = 0;
525 atomic_inc(&vcc->stats->rx_err);
526 }
527 else {
528 length = ATM_CELL_SIZE-1; /* no HEC */
529 }
530 skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL;
531 if (!skb) {
532 discard(vcc,length >> 2);
533 return 0;
534 }
535 skb_put(skb,length);
536 skb->tstamp = eni_vcc->timestamp;
537 DPRINTK("got len %ld\n",length);
538 if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1;
539 eni_vcc->rxing++;
540 return 0;
541}
542
543
544static int rx_aal5(struct atm_vcc *vcc)
545{
546 struct eni_vcc *eni_vcc;
547 unsigned long descr;
548 unsigned long size,eff,length;
549 struct sk_buff *skb;
550
551 EVENT("rx_aal5\n",0,0);
552 DPRINTK(">rx_aal5\n");
553 eni_vcc = ENI_VCC(vcc);
554 descr = readl(eni_vcc->recv+eni_vcc->descr*4);
555 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
556 rx_ident_err(vcc);
557 return 1;
558 }
559 if (descr & (MID_RED_T | MID_RED_CRC_ERR)) {
560 if (descr & MID_RED_T) {
561 EVENT("empty cell (descr=0x%lx)\n",descr,0);
562 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
563 vcc->dev->number);
564 size = 0;
565 }
566 else {
567 static unsigned long silence = 0;
568
569 if (time_after(jiffies, silence) || silence == 0) {
570 printk(KERN_WARNING DEV_LABEL "(itf %d): "
571 "discarding PDU(s) with CRC error\n",
572 vcc->dev->number);
573 silence = (jiffies+2*HZ)|1;
574 }
575 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
576 EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr,
577 size);
578 }
579 eff = length = 0;
580 atomic_inc(&vcc->stats->rx_err);
581 }
582 else {
583 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
584 DPRINTK("size=%ld\n",size);
585 length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) &
586 (eni_vcc->words-1)))*4) & 0xffff;
587 /* -trailer(2)+header(1) */
588 if (length && length <= (size << 2)-8 && length <=
589 ATM_MAX_AAL5_PDU) eff = (length+3) >> 2;
590 else { /* ^ trailer length (8) */
591 EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr,
592 length);
593 printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU "
594 "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n",
595 vcc->dev->number,vcc->vci,length,size << 2,descr);
596 length = eff = 0;
597 atomic_inc(&vcc->stats->rx_err);
598 }
599 }
600 skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL;
601 if (!skb) {
602 discard(vcc,size);
603 return 0;
604 }
605 skb_put(skb,length);
606 DPRINTK("got len %ld\n",length);
607 if (do_rx_dma(vcc,skb,1,size,eff)) return 1;
608 eni_vcc->rxing++;
609 return 0;
610}
611
612
613static inline int rx_vcc(struct atm_vcc *vcc)
614{
615 void __iomem *vci_dsc;
616 unsigned long tmp;
617 struct eni_vcc *eni_vcc;
618
619 eni_vcc = ENI_VCC(vcc);
620 vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16;
621 EVENT("rx_vcc(1)\n",0,0);
622 while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >>
623 MID_VCI_DESCR_SHIFT)) {
624 EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n",
625 eni_vcc->descr,tmp);
626 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
627 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
628 MID_VCI_DESCR_SHIFT));
629 if (ENI_VCC(vcc)->rx(vcc)) return 1;
630 }
631 /* clear IN_SERVICE flag */
632 writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc);
633 /*
634 * If new data has arrived between evaluating the while condition and
635 * clearing IN_SERVICE, we wouldn't be notified until additional data
636 * follows. So we have to loop again to be sure.
637 */
638 EVENT("rx_vcc(3)\n",0,0);
639 while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR)
640 >> MID_VCI_DESCR_SHIFT)) {
641 EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n",
642 eni_vcc->descr,tmp);
643 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
644 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
645 MID_VCI_DESCR_SHIFT));
646 if (ENI_VCC(vcc)->rx(vcc)) return 1;
647 }
648 return 0;
649}
650
651
652static void poll_rx(struct atm_dev *dev)
653{
654 struct eni_dev *eni_dev;
655 struct atm_vcc *curr;
656
657 eni_dev = ENI_DEV(dev);
658 while ((curr = eni_dev->fast)) {
659 EVENT("poll_rx.fast\n",0,0);
660 if (rx_vcc(curr)) return;
661 eni_dev->fast = ENI_VCC(curr)->next;
662 ENI_VCC(curr)->next = ENI_VCC_NOS;
663 barrier();
664 ENI_VCC(curr)->servicing--;
665 }
666 while ((curr = eni_dev->slow)) {
667 EVENT("poll_rx.slow\n",0,0);
668 if (rx_vcc(curr)) return;
669 eni_dev->slow = ENI_VCC(curr)->next;
670 ENI_VCC(curr)->next = ENI_VCC_NOS;
671 barrier();
672 ENI_VCC(curr)->servicing--;
673 }
674}
675
676
677static void get_service(struct atm_dev *dev)
678{
679 struct eni_dev *eni_dev;
680 struct atm_vcc *vcc;
681 unsigned long vci;
682
683 DPRINTK(">get_service\n");
684 eni_dev = ENI_DEV(dev);
685 while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) {
686 vci = readl(eni_dev->service+eni_dev->serv_read*4);
687 eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1);
688 vcc = eni_dev->rx_map[vci & 1023];
689 if (!vcc) {
690 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not "
691 "found\n",dev->number,vci);
692 continue; /* nasty but we try to go on anyway */
693 /* @@@ nope, doesn't work */
694 }
695 EVENT("getting from service\n",0,0);
696 if (ENI_VCC(vcc)->next != ENI_VCC_NOS) {
697 EVENT("double service\n",0,0);
698 DPRINTK("Grr, servicing VCC %ld twice\n",vci);
699 continue;
700 }
701 ENI_VCC(vcc)->timestamp = ktime_get_real();
702 ENI_VCC(vcc)->next = NULL;
703 if (vcc->qos.rxtp.traffic_class == ATM_CBR) {
704 if (eni_dev->fast)
705 ENI_VCC(eni_dev->last_fast)->next = vcc;
706 else eni_dev->fast = vcc;
707 eni_dev->last_fast = vcc;
708 }
709 else {
710 if (eni_dev->slow)
711 ENI_VCC(eni_dev->last_slow)->next = vcc;
712 else eni_dev->slow = vcc;
713 eni_dev->last_slow = vcc;
714 }
715putting++;
716 ENI_VCC(vcc)->servicing++;
717 }
718}
719
720
721static void dequeue_rx(struct atm_dev *dev)
722{
723 struct eni_dev *eni_dev;
724 struct eni_vcc *eni_vcc;
725 struct atm_vcc *vcc;
726 struct sk_buff *skb;
727 void __iomem *vci_dsc;
728 int first;
729
730 eni_dev = ENI_DEV(dev);
731 first = 1;
732 while (1) {
733 skb = skb_dequeue(&eni_dev->rx_queue);
734 if (!skb) {
735 if (first) {
736 DPRINTK(DEV_LABEL "(itf %d): RX but not "
737 "rxing\n",dev->number);
738 EVENT("nothing to dequeue\n",0,0);
739 }
740 break;
741 }
742 EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb),
743 ENI_PRV_POS(skb));
744rx_dequeued++;
745 vcc = ATM_SKB(skb)->vcc;
746 eni_vcc = ENI_VCC(vcc);
747 first = 0;
748 vci_dsc = eni_dev->vci+vcc->vci*16;
749 if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb),
750 (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT,
751 eni_vcc->words)) {
752 EVENT("requeuing\n",0,0);
753 skb_queue_head(&eni_dev->rx_queue,skb);
754 break;
755 }
756 eni_vcc->rxing--;
757 eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1);
758 pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len,
759 PCI_DMA_TODEVICE);
760 if (!skb->len) dev_kfree_skb_irq(skb);
761 else {
762 EVENT("pushing (len=%ld)\n",skb->len,0);
763 if (vcc->qos.aal == ATM_AAL0)
764 *(unsigned long *) skb->data =
765 ntohl(*(unsigned long *) skb->data);
766 memset(skb->cb,0,sizeof(struct eni_skb_prv));
767 vcc->push(vcc,skb);
768 pushed++;
769 }
770 atomic_inc(&vcc->stats->rx);
771 }
772 wake_up(&eni_dev->rx_wait);
773}
774
775
776static int open_rx_first(struct atm_vcc *vcc)
777{
778 struct eni_dev *eni_dev;
779 struct eni_vcc *eni_vcc;
780 unsigned long size;
781
782 DPRINTK("open_rx_first\n");
783 eni_dev = ENI_DEV(vcc->dev);
784 eni_vcc = ENI_VCC(vcc);
785 eni_vcc->rx = NULL;
786 if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0;
787 size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100;
788 if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <=
789 MID_MAX_BUF_SIZE)
790 size = MID_MAX_BUF_SIZE;
791 eni_vcc->recv = eni_alloc_mem(eni_dev,&size);
792 DPRINTK("rx at 0x%lx\n",eni_vcc->recv);
793 eni_vcc->words = size >> 2;
794 if (!eni_vcc->recv) return -ENOBUFS;
795 eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0;
796 eni_vcc->descr = 0;
797 eni_vcc->rx_pos = 0;
798 eni_vcc->rxing = 0;
799 eni_vcc->servicing = 0;
800 eni_vcc->next = ENI_VCC_NOS;
801 return 0;
802}
803
804
805static int open_rx_second(struct atm_vcc *vcc)
806{
807 void __iomem *here;
808 struct eni_dev *eni_dev;
809 struct eni_vcc *eni_vcc;
810 unsigned long size;
811 int order;
812
813 DPRINTK("open_rx_second\n");
814 eni_dev = ENI_DEV(vcc->dev);
815 eni_vcc = ENI_VCC(vcc);
816 if (!eni_vcc->rx) return 0;
817 /* set up VCI descriptor */
818 here = eni_dev->vci+vcc->vci*16;
819 DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4);
820 size = eni_vcc->words >> 8;
821 for (order = -1; size; order++) size >>= 1;
822 writel(0,here+4); /* descr, read = 0 */
823 writel(0,here+8); /* write, state, count = 0 */
824 if (eni_dev->rx_map[vcc->vci])
825 printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already "
826 "in use\n",vcc->dev->number,vcc->vci);
827 eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */
828 writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) <<
829 MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE |
830 (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) <<
831 MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here);
832 return 0;
833}
834
835
836static void close_rx(struct atm_vcc *vcc)
837{
838 DECLARE_WAITQUEUE(wait,current);
839 void __iomem *here;
840 struct eni_dev *eni_dev;
841 struct eni_vcc *eni_vcc;
842
843 eni_vcc = ENI_VCC(vcc);
844 if (!eni_vcc->rx) return;
845 eni_dev = ENI_DEV(vcc->dev);
846 if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) {
847 here = eni_dev->vci+vcc->vci*16;
848 /* block receiver */
849 writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH <<
850 MID_VCI_MODE_SHIFT),here);
851 /* wait for receiver to become idle */
852 udelay(27);
853 /* discard pending cell */
854 writel(readl(here) & ~MID_VCI_IN_SERVICE,here);
855 /* don't accept any new ones */
856 eni_dev->rx_map[vcc->vci] = NULL;
857 /* wait for RX queue to drain */
858 DPRINTK("eni_close: waiting for RX ...\n");
859 EVENT("RX closing\n",0,0);
860 add_wait_queue(&eni_dev->rx_wait,&wait);
861 set_current_state(TASK_UNINTERRUPTIBLE);
862 barrier();
863 for (;;) {
864 /* transition service->rx: rxing++, servicing-- */
865 if (!eni_vcc->servicing) {
866 barrier();
867 if (!eni_vcc->rxing) break;
868 }
869 EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing,
870 eni_vcc->servicing);
871 printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing,
872 eni_vcc->rxing);
873 schedule();
874 set_current_state(TASK_UNINTERRUPTIBLE);
875 }
876 for (;;) {
877 int at_end;
878 u32 tmp;
879
880 tasklet_disable(&eni_dev->task);
881 tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ;
882 at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT;
883 tasklet_enable(&eni_dev->task);
884 if (at_end) break;
885 EVENT("drain discard (host 0x%lx, nic 0x%lx)\n",
886 eni_vcc->rx_pos,tmp);
887 printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n",
888 eni_vcc->rx_pos,tmp);
889 schedule();
890 set_current_state(TASK_UNINTERRUPTIBLE);
891 }
892 set_current_state(TASK_RUNNING);
893 remove_wait_queue(&eni_dev->rx_wait,&wait);
894 }
895 eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2);
896 eni_vcc->rx = NULL;
897}
898
899
900static int start_rx(struct atm_dev *dev)
901{
902 struct eni_dev *eni_dev;
903
904 eni_dev = ENI_DEV(dev);
905 eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL);
906 if (!eni_dev->rx_map) {
907 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
908 dev->number);
909 free_page((unsigned long) eni_dev->free_list);
910 return -ENOMEM;
911 }
912 eni_dev->rx_mult = DEFAULT_RX_MULT;
913 eni_dev->fast = eni_dev->last_fast = NULL;
914 eni_dev->slow = eni_dev->last_slow = NULL;
915 init_waitqueue_head(&eni_dev->rx_wait);
916 skb_queue_head_init(&eni_dev->rx_queue);
917 eni_dev->serv_read = eni_in(MID_SERV_WRITE);
918 eni_out(0,MID_DMA_WR_RX);
919 return 0;
920}
921
922
923/*----------------------------------- TX ------------------------------------*/
924
925
926enum enq_res { enq_ok,enq_next,enq_jam };
927
928
929static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr,
930 u32 size)
931{
932 u32 init,words;
933
934 DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size);
935 EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size);
936#if 0 /* don't complain anymore */
937 if (paddr & 3)
938 printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr);
939 if (size & 3)
940 printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size);
941#endif
942 if (paddr & 3) {
943 init = 4-(paddr & 3);
944 if (init > size || size < 7) init = size;
945 DPRINTK("put_dma: %lx DMA: %d/%d bytes\n",
946 (unsigned long) paddr,init,size);
947 dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) |
948 (chan << MID_DMA_CHAN_SHIFT);
949 dma[(*j)++] = paddr;
950 paddr += init;
951 size -= init;
952 }
953 words = size >> 2;
954 size &= 3;
955 if (words && (paddr & 31)) {
956 init = 8-((paddr & 31) >> 2);
957 if (init > words) init = words;
958 DPRINTK("put_dma: %lx DMA: %d/%d words\n",
959 (unsigned long) paddr,init,words);
960 dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
961 (chan << MID_DMA_CHAN_SHIFT);
962 dma[(*j)++] = paddr;
963 paddr += init << 2;
964 words -= init;
965 }
966#ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */
967 if (words & ~15) {
968 DPRINTK("put_dma: %lx DMA: %d*16/%d words\n",
969 (unsigned long) paddr,words >> 4,words);
970 dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT)
971 | (chan << MID_DMA_CHAN_SHIFT);
972 dma[(*j)++] = paddr;
973 paddr += (words & ~15) << 2;
974 words &= 15;
975 }
976#endif
977#ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */
978 if (words & ~7) {
979 DPRINTK("put_dma: %lx DMA: %d*8/%d words\n",
980 (unsigned long) paddr,words >> 3,words);
981 dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT)
982 | (chan << MID_DMA_CHAN_SHIFT);
983 dma[(*j)++] = paddr;
984 paddr += (words & ~7) << 2;
985 words &= 7;
986 }
987#endif
988#ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */
989 if (words & ~3) {
990 DPRINTK("put_dma: %lx DMA: %d*4/%d words\n",
991 (unsigned long) paddr,words >> 2,words);
992 dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT)
993 | (chan << MID_DMA_CHAN_SHIFT);
994 dma[(*j)++] = paddr;
995 paddr += (words & ~3) << 2;
996 words &= 3;
997 }
998#endif
999#ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */
1000 if (words & ~1) {
1001 DPRINTK("put_dma: %lx DMA: %d*2/%d words\n",
1002 (unsigned long) paddr,words >> 1,words);
1003 dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT)
1004 | (chan << MID_DMA_CHAN_SHIFT);
1005 dma[(*j)++] = paddr;
1006 paddr += (words & ~1) << 2;
1007 words &= 1;
1008 }
1009#endif
1010 if (words) {
1011 DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr,
1012 words);
1013 dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) |
1014 (chan << MID_DMA_CHAN_SHIFT);
1015 dma[(*j)++] = paddr;
1016 paddr += words << 2;
1017 }
1018 if (size) {
1019 DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr,
1020 size);
1021 dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) |
1022 (chan << MID_DMA_CHAN_SHIFT);
1023 dma[(*j)++] = paddr;
1024 }
1025}
1026
1027
1028static enum enq_res do_tx(struct sk_buff *skb)
1029{
1030 struct atm_vcc *vcc;
1031 struct eni_dev *eni_dev;
1032 struct eni_vcc *eni_vcc;
1033 struct eni_tx *tx;
1034 dma_addr_t paddr;
1035 u32 dma_rd,dma_wr;
1036 u32 size; /* in words */
1037 int aal5,dma_size,i,j;
1038
1039 DPRINTK(">do_tx\n");
1040 NULLCHECK(skb);
1041 EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len);
1042 vcc = ATM_SKB(skb)->vcc;
1043 NULLCHECK(vcc);
1044 eni_dev = ENI_DEV(vcc->dev);
1045 NULLCHECK(eni_dev);
1046 eni_vcc = ENI_VCC(vcc);
1047 tx = eni_vcc->tx;
1048 NULLCHECK(tx);
1049#if 0 /* Enable this for testing with the "align" program */
1050 {
1051 unsigned int hack = *((char *) skb->data)-'0';
1052
1053 if (hack < 8) {
1054 skb->data += hack;
1055 skb->len -= hack;
1056 }
1057 }
1058#endif
1059#if 0 /* should work now */
1060 if ((unsigned long) skb->data & 3)
1061 printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned "
1062 "TX data\n",vcc->dev->number,vcc->vci);
1063#endif
1064 /*
1065 * Potential future IP speedup: make hard_header big enough to put
1066 * segmentation descriptor directly into PDU. Saves: 4 slave writes,
1067 * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-)
1068 */
1069
1070 aal5 = vcc->qos.aal == ATM_AAL5;
1071 /* check space in buffer */
1072 if (!aal5)
1073 size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE;
1074 /* cell without HEC plus segmentation header (includes
1075 four-byte cell header) */
1076 else {
1077 size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1;
1078 /* add AAL5 trailer */
1079 size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE;
1080 /* add segmentation header */
1081 }
1082 /*
1083 * Can I move tx_pos by size bytes without getting closer than TX_GAP
1084 * to the read pointer ? TX_GAP means to leave some space for what
1085 * the manual calls "too close".
1086 */
1087 if (!NEPMOK(tx->tx_pos,size+TX_GAP,
1088 eni_in(MID_TX_RDPTR(tx->index)),tx->words)) {
1089 DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n",
1090 vcc->dev->number,size);
1091 return enq_next;
1092 }
1093 /* check DMA */
1094 dma_wr = eni_in(MID_DMA_WR_TX);
1095 dma_rd = eni_in(MID_DMA_RD_TX);
1096 dma_size = 3; /* JK for descriptor and final fill, plus final size
1097 mis-alignment fix */
1098DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags);
1099 if (!skb_shinfo(skb)->nr_frags) dma_size += 5;
1100 else dma_size += 5*(skb_shinfo(skb)->nr_frags+1);
1101 if (dma_size > TX_DMA_BUF) {
1102 printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries "
1103 "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF);
1104 }
1105 DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos);
1106 if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) <
1107 dma_size) {
1108 printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n",
1109 vcc->dev->number);
1110 return enq_jam;
1111 }
1112 paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len,
1113 PCI_DMA_TODEVICE);
1114 ENI_PRV_PADDR(skb) = paddr;
1115 /* prepare DMA queue entries */
1116 j = 0;
1117 eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) <<
1118 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1119 MID_DT_JK;
1120 j++;
1121 if (!skb_shinfo(skb)->nr_frags)
1122 if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len);
1123 else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4);
1124 else {
1125DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */
1126 for (i = -1; i < skb_shinfo(skb)->nr_frags; i++)
1127 if (i == -1)
1128 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1129 skb->data,
1130 skb_headlen(skb));
1131 else
1132 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1133 skb_frag_page(&skb_shinfo(skb)->frags[i]) +
1134 skb_shinfo(skb)->frags[i].page_offset,
1135 skb_frag_size(&skb_shinfo(skb)->frags[i]));
1136 }
1137 if (skb->len & 3) {
1138 put_dma(tx->index, eni_dev->dma, &j, eni_dev->zero.dma,
1139 4 - (skb->len & 3));
1140 }
1141 /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */
1142 eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) <<
1143 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1144 MID_DMA_END | MID_DT_JK;
1145 j++;
1146 DPRINTK("DMA at end: %d\n",j);
1147 /* store frame */
1148 writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) |
1149 (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) |
1150 (tx->resolution << MID_SEG_RATE_SHIFT) |
1151 (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4);
1152/*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/
1153 writel((vcc->vci << MID_SEG_VCI_SHIFT) |
1154 (aal5 ? 0 : (skb->data[3] & 0xf)) |
1155 (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0),
1156 tx->send+((tx->tx_pos+1) & (tx->words-1))*4);
1157 DPRINTK("size: %d, len:%d\n",size,skb->len);
1158 if (aal5)
1159 writel(skb->len,tx->send+
1160 ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4);
1161 j = j >> 1;
1162 for (i = 0; i < j; i++) {
1163 writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8);
1164 writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4);
1165 dma_wr = (dma_wr+1) & (NR_DMA_TX-1);
1166 }
1167 ENI_PRV_POS(skb) = tx->tx_pos;
1168 ENI_PRV_SIZE(skb) = size;
1169 ENI_VCC(vcc)->txing += size;
1170 tx->tx_pos = (tx->tx_pos+size) & (tx->words-1);
1171 DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos);
1172 eni_out(dma_wr,MID_DMA_WR_TX);
1173 skb_queue_tail(&eni_dev->tx_queue,skb);
1174queued++;
1175 return enq_ok;
1176}
1177
1178
1179static void poll_tx(struct atm_dev *dev)
1180{
1181 struct eni_tx *tx;
1182 struct sk_buff *skb;
1183 enum enq_res res;
1184 int i;
1185
1186 DPRINTK(">poll_tx\n");
1187 for (i = NR_CHAN-1; i >= 0; i--) {
1188 tx = &ENI_DEV(dev)->tx[i];
1189 if (tx->send)
1190 while ((skb = skb_dequeue(&tx->backlog))) {
1191 res = do_tx(skb);
1192 if (res == enq_ok) continue;
1193 DPRINTK("re-queuing TX PDU\n");
1194 skb_queue_head(&tx->backlog,skb);
1195requeued++;
1196 if (res == enq_jam) return;
1197 break;
1198 }
1199 }
1200}
1201
1202
1203static void dequeue_tx(struct atm_dev *dev)
1204{
1205 struct eni_dev *eni_dev;
1206 struct atm_vcc *vcc;
1207 struct sk_buff *skb;
1208 struct eni_tx *tx;
1209
1210 NULLCHECK(dev);
1211 eni_dev = ENI_DEV(dev);
1212 NULLCHECK(eni_dev);
1213 while ((skb = skb_dequeue(&eni_dev->tx_queue))) {
1214 vcc = ATM_SKB(skb)->vcc;
1215 NULLCHECK(vcc);
1216 tx = ENI_VCC(vcc)->tx;
1217 NULLCHECK(ENI_VCC(vcc)->tx);
1218 DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb),
1219 (unsigned) eni_in(MID_TX_DESCRSTART(tx->index)));
1220 if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) ==
1221 eni_in(MID_TX_DESCRSTART(tx->index))) {
1222 skb_queue_head(&eni_dev->tx_queue,skb);
1223 break;
1224 }
1225 ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb);
1226 pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len,
1227 PCI_DMA_TODEVICE);
1228 if (vcc->pop) vcc->pop(vcc,skb);
1229 else dev_kfree_skb_irq(skb);
1230 atomic_inc(&vcc->stats->tx);
1231 wake_up(&eni_dev->tx_wait);
1232dma_complete++;
1233 }
1234}
1235
1236
1237static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr)
1238{
1239 int i;
1240
1241 for (i = !ubr; i < NR_CHAN; i++)
1242 if (!eni_dev->tx[i].send) return eni_dev->tx+i;
1243 return NULL;
1244}
1245
1246
1247static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre,
1248 int *res,int unlimited)
1249{
1250 static const int pre_div[] = { 4,16,128,2048 };
1251 /* 2^(((x+2)^2-(x+2))/2+1) */
1252
1253 if (unlimited) *pre = *res = 0;
1254 else {
1255 if (*pcr > 0) {
1256 int div;
1257
1258 for (*pre = 0; *pre < 3; (*pre)++)
1259 if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break;
1260 div = pre_div[*pre]**pcr;
1261 DPRINTK("min div %d\n",div);
1262 *res = TS_CLOCK/div-1;
1263 }
1264 else {
1265 int div;
1266
1267 if (!*pcr) *pcr = eni_dev->tx_bw+reserved;
1268 for (*pre = 3; *pre >= 0; (*pre)--)
1269 if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break;
1270 if (*pre < 3) (*pre)++; /* else fail later */
1271 div = pre_div[*pre]*-*pcr;
1272 DPRINTK("max div %d\n",div);
1273 *res = DIV_ROUND_UP(TS_CLOCK, div)-1;
1274 }
1275 if (*res < 0) *res = 0;
1276 if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE;
1277 }
1278 *pcr = TS_CLOCK/pre_div[*pre]/(*res+1);
1279 DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res);
1280 return 0;
1281}
1282
1283
1284static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp,
1285 int set_rsv,int set_shp)
1286{
1287 struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1288 struct eni_vcc *eni_vcc = ENI_VCC(vcc);
1289 struct eni_tx *tx;
1290 unsigned long size;
1291 void __iomem *mem;
1292 int rate,ubr,unlimited,new_tx;
1293 int pre,res,order;
1294 int error;
1295
1296 rate = atm_pcr_goal(txtp);
1297 ubr = txtp->traffic_class == ATM_UBR;
1298 unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR ||
1299 rate >= ATM_OC3_PCR);
1300 if (!unlimited) {
1301 size = txtp->max_sdu*eni_dev->tx_mult/100;
1302 if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <=
1303 MID_MAX_BUF_SIZE)
1304 size = MID_MAX_BUF_SIZE;
1305 }
1306 else {
1307 if (eni_dev->ubr) {
1308 eni_vcc->tx = eni_dev->ubr;
1309 txtp->pcr = ATM_OC3_PCR;
1310 return 0;
1311 }
1312 size = UBR_BUFFER;
1313 }
1314 new_tx = !eni_vcc->tx;
1315 mem = NULL; /* for gcc */
1316 if (!new_tx) tx = eni_vcc->tx;
1317 else {
1318 mem = eni_alloc_mem(eni_dev,&size);
1319 if (!mem) return -ENOBUFS;
1320 tx = alloc_tx(eni_dev,unlimited);
1321 if (!tx) {
1322 eni_free_mem(eni_dev,mem,size);
1323 return -EBUSY;
1324 }
1325 DPRINTK("got chan %d\n",tx->index);
1326 tx->reserved = tx->shaping = 0;
1327 tx->send = mem;
1328 tx->words = size >> 2;
1329 skb_queue_head_init(&tx->backlog);
1330 for (order = 0; size > (1 << (order+10)); order++);
1331 eni_out((order << MID_SIZE_SHIFT) |
1332 ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)),
1333 MID_TX_PLACE(tx->index));
1334 tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) &
1335 MID_DESCR_START;
1336 }
1337 error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited);
1338 if (!error && txtp->min_pcr > rate) error = -EINVAL;
1339 if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR &&
1340 txtp->max_pcr < rate) error = -EINVAL;
1341 if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved)
1342 error = -EINVAL;
1343 if (!error && set_rsv && !set_shp && rate < tx->shaping)
1344 error = -EINVAL;
1345 if (!error && !set_rsv && rate > tx->reserved && !ubr)
1346 error = -EINVAL;
1347 if (error) {
1348 if (new_tx) {
1349 tx->send = NULL;
1350 eni_free_mem(eni_dev,mem,size);
1351 }
1352 return error;
1353 }
1354 txtp->pcr = rate;
1355 if (set_rsv && !ubr) {
1356 eni_dev->tx_bw += tx->reserved;
1357 tx->reserved = rate;
1358 eni_dev->tx_bw -= rate;
1359 }
1360 if (set_shp || (unlimited && new_tx)) {
1361 if (unlimited && new_tx) eni_dev->ubr = tx;
1362 tx->prescaler = pre;
1363 tx->resolution = res;
1364 tx->shaping = rate;
1365 }
1366 if (set_shp) eni_vcc->tx = tx;
1367 DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping);
1368 return 0;
1369}
1370
1371
1372static int open_tx_first(struct atm_vcc *vcc)
1373{
1374 ENI_VCC(vcc)->tx = NULL;
1375 if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0;
1376 ENI_VCC(vcc)->txing = 0;
1377 return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1);
1378}
1379
1380
1381static int open_tx_second(struct atm_vcc *vcc)
1382{
1383 return 0; /* nothing to do */
1384}
1385
1386
1387static void close_tx(struct atm_vcc *vcc)
1388{
1389 DECLARE_WAITQUEUE(wait,current);
1390 struct eni_dev *eni_dev;
1391 struct eni_vcc *eni_vcc;
1392
1393 eni_vcc = ENI_VCC(vcc);
1394 if (!eni_vcc->tx) return;
1395 eni_dev = ENI_DEV(vcc->dev);
1396 /* wait for TX queue to drain */
1397 DPRINTK("eni_close: waiting for TX ...\n");
1398 add_wait_queue(&eni_dev->tx_wait,&wait);
1399 set_current_state(TASK_UNINTERRUPTIBLE);
1400 for (;;) {
1401 int txing;
1402
1403 tasklet_disable(&eni_dev->task);
1404 txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing;
1405 tasklet_enable(&eni_dev->task);
1406 if (!txing) break;
1407 DPRINTK("%d TX left\n",eni_vcc->txing);
1408 schedule();
1409 set_current_state(TASK_UNINTERRUPTIBLE);
1410 }
1411 set_current_state(TASK_RUNNING);
1412 remove_wait_queue(&eni_dev->tx_wait,&wait);
1413 if (eni_vcc->tx != eni_dev->ubr) {
1414 /*
1415 * Looping a few times in here is probably far cheaper than
1416 * keeping track of TX completions all the time, so let's poll
1417 * a bit ...
1418 */
1419 while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) !=
1420 eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index)))
1421 schedule();
1422 eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2);
1423 eni_vcc->tx->send = NULL;
1424 eni_dev->tx_bw += eni_vcc->tx->reserved;
1425 }
1426 eni_vcc->tx = NULL;
1427}
1428
1429
1430static int start_tx(struct atm_dev *dev)
1431{
1432 struct eni_dev *eni_dev;
1433 int i;
1434
1435 eni_dev = ENI_DEV(dev);
1436 eni_dev->lost = 0;
1437 eni_dev->tx_bw = ATM_OC3_PCR;
1438 eni_dev->tx_mult = DEFAULT_TX_MULT;
1439 init_waitqueue_head(&eni_dev->tx_wait);
1440 eni_dev->ubr = NULL;
1441 skb_queue_head_init(&eni_dev->tx_queue);
1442 eni_out(0,MID_DMA_WR_TX);
1443 for (i = 0; i < NR_CHAN; i++) {
1444 eni_dev->tx[i].send = NULL;
1445 eni_dev->tx[i].index = i;
1446 }
1447 return 0;
1448}
1449
1450
1451/*--------------------------------- common ----------------------------------*/
1452
1453
1454#if 0 /* may become useful again when tuning things */
1455
1456static void foo(void)
1457{
1458printk(KERN_INFO
1459 "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n"
1460 "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n",
1461 tx_complete,dma_complete,queued,requeued,submitted,backlogged,
1462 rx_enqueued,rx_dequeued,putting,pushed);
1463if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost);
1464}
1465
1466#endif
1467
1468
1469static void bug_int(struct atm_dev *dev,unsigned long reason)
1470{
1471 DPRINTK(">bug_int\n");
1472 if (reason & MID_DMA_ERR_ACK)
1473 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1474 "error\n",dev->number);
1475 if (reason & MID_TX_IDENT_MISM)
1476 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident "
1477 "mismatch\n",dev->number);
1478 if (reason & MID_TX_DMA_OVFL)
1479 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1480 "overflow\n",dev->number);
1481 EVENT("---dump ends here---\n",0,0);
1482 printk(KERN_NOTICE "---recent events---\n");
1483 event_dump();
1484}
1485
1486
1487static irqreturn_t eni_int(int irq,void *dev_id)
1488{
1489 struct atm_dev *dev;
1490 struct eni_dev *eni_dev;
1491 u32 reason;
1492
1493 DPRINTK(">eni_int\n");
1494 dev = dev_id;
1495 eni_dev = ENI_DEV(dev);
1496 reason = eni_in(MID_ISA);
1497 DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason);
1498 /*
1499 * Must handle these two right now, because reading ISA doesn't clear
1500 * them, so they re-occur and we never make it to the tasklet. Since
1501 * they're rare, we don't mind the occasional invocation of eni_tasklet
1502 * with eni_dev->events == 0.
1503 */
1504 if (reason & MID_STAT_OVFL) {
1505 EVENT("stat overflow\n",0,0);
1506 eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH;
1507 }
1508 if (reason & MID_SUNI_INT) {
1509 EVENT("SUNI int\n",0,0);
1510 dev->phy->interrupt(dev);
1511#if 0
1512 foo();
1513#endif
1514 }
1515 spin_lock(&eni_dev->lock);
1516 eni_dev->events |= reason;
1517 spin_unlock(&eni_dev->lock);
1518 tasklet_schedule(&eni_dev->task);
1519 return IRQ_HANDLED;
1520}
1521
1522
1523static void eni_tasklet(unsigned long data)
1524{
1525 struct atm_dev *dev = (struct atm_dev *) data;
1526 struct eni_dev *eni_dev = ENI_DEV(dev);
1527 unsigned long flags;
1528 u32 events;
1529
1530 DPRINTK("eni_tasklet (dev %p)\n",dev);
1531 spin_lock_irqsave(&eni_dev->lock,flags);
1532 events = xchg(&eni_dev->events,0);
1533 spin_unlock_irqrestore(&eni_dev->lock,flags);
1534 if (events & MID_RX_DMA_COMPLETE) {
1535 EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0);
1536 dequeue_rx(dev);
1537 EVENT("dequeue_rx done, starting poll_rx\n",0,0);
1538 poll_rx(dev);
1539 EVENT("poll_rx done\n",0,0);
1540 /* poll_tx ? */
1541 }
1542 if (events & MID_SERVICE) {
1543 EVENT("INT: service, starting get_service\n",0,0);
1544 get_service(dev);
1545 EVENT("get_service done, starting poll_rx\n",0,0);
1546 poll_rx(dev);
1547 EVENT("poll_rx done\n",0,0);
1548 }
1549 if (events & MID_TX_DMA_COMPLETE) {
1550 EVENT("INT: TX DMA COMPLETE\n",0,0);
1551 dequeue_tx(dev);
1552 }
1553 if (events & MID_TX_COMPLETE) {
1554 EVENT("INT: TX COMPLETE\n",0,0);
1555tx_complete++;
1556 wake_up(&eni_dev->tx_wait);
1557 /* poll_rx ? */
1558 }
1559 if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) {
1560 EVENT("bug interrupt\n",0,0);
1561 bug_int(dev,events);
1562 }
1563 poll_tx(dev);
1564}
1565
1566
1567/*--------------------------------- entries ---------------------------------*/
1568
1569
1570static const char *media_name[] __devinitdata = {
1571 "MMF", "SMF", "MMF", "03?", /* 0- 3 */
1572 "UTP", "05?", "06?", "07?", /* 4- 7 */
1573 "TAXI","09?", "10?", "11?", /* 8-11 */
1574 "12?", "13?", "14?", "15?", /* 12-15 */
1575 "MMF", "SMF", "18?", "19?", /* 16-19 */
1576 "UTP", "21?", "22?", "23?", /* 20-23 */
1577 "24?", "25?", "26?", "27?", /* 24-27 */
1578 "28?", "29?", "30?", "31?" /* 28-31 */
1579};
1580
1581
1582#define SET_SEPROM \
1583 ({ if (!error && !pci_error) { \
1584 pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \
1585 udelay(10); /* 10 usecs */ \
1586 } })
1587#define GET_SEPROM \
1588 ({ if (!error && !pci_error) { \
1589 pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \
1590 udelay(10); /* 10 usecs */ \
1591 } })
1592
1593
1594static int __devinit get_esi_asic(struct atm_dev *dev)
1595{
1596 struct eni_dev *eni_dev;
1597 unsigned char tonga;
1598 int error,failed,pci_error;
1599 int address,i,j;
1600
1601 eni_dev = ENI_DEV(dev);
1602 error = pci_error = 0;
1603 tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK;
1604 SET_SEPROM;
1605 for (i = 0; i < ESI_LEN && !error && !pci_error; i++) {
1606 /* start operation */
1607 tonga |= SEPROM_DATA;
1608 SET_SEPROM;
1609 tonga |= SEPROM_CLK;
1610 SET_SEPROM;
1611 tonga &= ~SEPROM_DATA;
1612 SET_SEPROM;
1613 tonga &= ~SEPROM_CLK;
1614 SET_SEPROM;
1615 /* send address */
1616 address = ((i+SEPROM_ESI_BASE) << 1)+1;
1617 for (j = 7; j >= 0; j--) {
1618 tonga = (address >> j) & 1 ? tonga | SEPROM_DATA :
1619 tonga & ~SEPROM_DATA;
1620 SET_SEPROM;
1621 tonga |= SEPROM_CLK;
1622 SET_SEPROM;
1623 tonga &= ~SEPROM_CLK;
1624 SET_SEPROM;
1625 }
1626 /* get ack */
1627 tonga |= SEPROM_DATA;
1628 SET_SEPROM;
1629 tonga |= SEPROM_CLK;
1630 SET_SEPROM;
1631 GET_SEPROM;
1632 failed = tonga & SEPROM_DATA;
1633 tonga &= ~SEPROM_CLK;
1634 SET_SEPROM;
1635 tonga |= SEPROM_DATA;
1636 SET_SEPROM;
1637 if (failed) error = -EIO;
1638 else {
1639 dev->esi[i] = 0;
1640 for (j = 7; j >= 0; j--) {
1641 dev->esi[i] <<= 1;
1642 tonga |= SEPROM_DATA;
1643 SET_SEPROM;
1644 tonga |= SEPROM_CLK;
1645 SET_SEPROM;
1646 GET_SEPROM;
1647 if (tonga & SEPROM_DATA) dev->esi[i] |= 1;
1648 tonga &= ~SEPROM_CLK;
1649 SET_SEPROM;
1650 tonga |= SEPROM_DATA;
1651 SET_SEPROM;
1652 }
1653 /* get ack */
1654 tonga |= SEPROM_DATA;
1655 SET_SEPROM;
1656 tonga |= SEPROM_CLK;
1657 SET_SEPROM;
1658 GET_SEPROM;
1659 if (!(tonga & SEPROM_DATA)) error = -EIO;
1660 tonga &= ~SEPROM_CLK;
1661 SET_SEPROM;
1662 tonga |= SEPROM_DATA;
1663 SET_SEPROM;
1664 }
1665 /* stop operation */
1666 tonga &= ~SEPROM_DATA;
1667 SET_SEPROM;
1668 tonga |= SEPROM_CLK;
1669 SET_SEPROM;
1670 tonga |= SEPROM_DATA;
1671 SET_SEPROM;
1672 }
1673 if (pci_error) {
1674 printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI "
1675 "(0x%02x)\n",dev->number,pci_error);
1676 error = -EIO;
1677 }
1678 return error;
1679}
1680
1681
1682#undef SET_SEPROM
1683#undef GET_SEPROM
1684
1685
1686static int __devinit get_esi_fpga(struct atm_dev *dev, void __iomem *base)
1687{
1688 void __iomem *mac_base;
1689 int i;
1690
1691 mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom);
1692 for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3));
1693 return 0;
1694}
1695
1696
1697static int __devinit eni_do_init(struct atm_dev *dev)
1698{
1699 struct midway_eprom __iomem *eprom;
1700 struct eni_dev *eni_dev;
1701 struct pci_dev *pci_dev;
1702 unsigned long real_base;
1703 void __iomem *base;
1704 int error,i,last;
1705
1706 DPRINTK(">eni_init\n");
1707 dev->ci_range.vpi_bits = 0;
1708 dev->ci_range.vci_bits = NR_VCI_LD;
1709 dev->link_rate = ATM_OC3_PCR;
1710 eni_dev = ENI_DEV(dev);
1711 pci_dev = eni_dev->pci_dev;
1712 real_base = pci_resource_start(pci_dev, 0);
1713 eni_dev->irq = pci_dev->irq;
1714 if ((error = pci_write_config_word(pci_dev,PCI_COMMAND,
1715 PCI_COMMAND_MEMORY |
1716 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1717 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory "
1718 "(0x%02x)\n",dev->number,error);
1719 return -EIO;
1720 }
1721 printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,",
1722 dev->number,pci_dev->revision,real_base,eni_dev->irq);
1723 if (!(base = ioremap_nocache(real_base,MAP_MAX_SIZE))) {
1724 printk("\n");
1725 printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page "
1726 "mapping\n",dev->number);
1727 return error;
1728 }
1729 eni_dev->ioaddr = base;
1730 eni_dev->base_diff = real_base - (unsigned long) base;
1731 /* id may not be present in ASIC Tonga boards - check this @@@ */
1732 if (!eni_dev->asic) {
1733 eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom));
1734 if (readl(&eprom->magic) != ENI155_MAGIC) {
1735 printk("\n");
1736 printk(KERN_ERR DEV_LABEL
1737 "(itf %d): bad magic - expected 0x%x, got 0x%x\n",
1738 dev->number, ENI155_MAGIC,
1739 (unsigned)readl(&eprom->magic));
1740 error = -EINVAL;
1741 goto unmap;
1742 }
1743 }
1744 eni_dev->phy = base+PHY_BASE;
1745 eni_dev->reg = base+REG_BASE;
1746 eni_dev->ram = base+RAM_BASE;
1747 last = MAP_MAX_SIZE-RAM_BASE;
1748 for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) {
1749 writel(0x55555555,eni_dev->ram+i);
1750 if (readl(eni_dev->ram+i) != 0x55555555) last = i;
1751 else {
1752 writel(0xAAAAAAAA,eni_dev->ram+i);
1753 if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i;
1754 else writel(i,eni_dev->ram+i);
1755 }
1756 }
1757 for (i = 0; i < last; i += RAM_INCREMENT)
1758 if (readl(eni_dev->ram+i) != i) break;
1759 eni_dev->mem = i;
1760 memset_io(eni_dev->ram,0,eni_dev->mem);
1761 /* TODO: should shrink allocation now */
1762 printk("mem=%dkB (",eni_dev->mem >> 10);
1763 /* TODO: check for non-SUNI, check for TAXI ? */
1764 if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) {
1765 printk(")\n");
1766 printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n",
1767 dev->number,(unsigned) eni_in(MID_RES_ID_MCON));
1768 error = -EINVAL;
1769 goto unmap;
1770 }
1771 error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base);
1772 if (error)
1773 goto unmap;
1774 for (i = 0; i < ESI_LEN; i++)
1775 printk("%s%02X",i ? "-" : "",dev->esi[i]);
1776 printk(")\n");
1777 printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number,
1778 eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA",
1779 media_name[eni_in(MID_RES_ID_MCON) & DAUGTHER_ID]);
1780
1781 error = suni_init(dev);
1782 if (error)
1783 goto unmap;
1784out:
1785 return error;
1786unmap:
1787 iounmap(base);
1788 goto out;
1789}
1790
1791static void eni_do_release(struct atm_dev *dev)
1792{
1793 struct eni_dev *ed = ENI_DEV(dev);
1794
1795 dev->phy->stop(dev);
1796 dev->phy = NULL;
1797 iounmap(ed->ioaddr);
1798}
1799
1800static int __devinit eni_start(struct atm_dev *dev)
1801{
1802 struct eni_dev *eni_dev;
1803
1804 void __iomem *buf;
1805 unsigned long buffer_mem;
1806 int error;
1807
1808 DPRINTK(">eni_start\n");
1809 eni_dev = ENI_DEV(dev);
1810 if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) {
1811 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
1812 dev->number,eni_dev->irq);
1813 error = -EAGAIN;
1814 goto out;
1815 }
1816 pci_set_master(eni_dev->pci_dev);
1817 if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND,
1818 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
1819 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1820 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+"
1821 "master (0x%02x)\n",dev->number,error);
1822 goto free_irq;
1823 }
1824 if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,
1825 END_SWAP_DMA))) {
1826 printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap "
1827 "(0x%02x)\n",dev->number,error);
1828 goto free_irq;
1829 }
1830 /* determine addresses of internal tables */
1831 eni_dev->vci = eni_dev->ram;
1832 eni_dev->rx_dma = eni_dev->ram+NR_VCI*16;
1833 eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8;
1834 eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8;
1835 buf = eni_dev->service+NR_SERVICE*4;
1836 DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n",
1837 eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma,
1838 eni_dev->service,buf);
1839 spin_lock_init(&eni_dev->lock);
1840 tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev);
1841 eni_dev->events = 0;
1842 /* initialize memory management */
1843 buffer_mem = eni_dev->mem - (buf - eni_dev->ram);
1844 eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2;
1845 eni_dev->free_list = kmalloc(
1846 sizeof(struct eni_free)*(eni_dev->free_list_size+1),GFP_KERNEL);
1847 if (!eni_dev->free_list) {
1848 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
1849 dev->number);
1850 error = -ENOMEM;
1851 goto free_irq;
1852 }
1853 eni_dev->free_len = 0;
1854 eni_put_free(eni_dev,buf,buffer_mem);
1855 memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */
1856 /*
1857 * byte_addr free (k)
1858 * 0x00000000 512 VCI table
1859 * 0x00004000 496 RX DMA
1860 * 0x00005000 492 TX DMA
1861 * 0x00006000 488 service list
1862 * 0x00007000 484 buffers
1863 * 0x00080000 0 end (512kB)
1864 */
1865 eni_out(0xffffffff,MID_IE);
1866 error = start_tx(dev);
1867 if (error) goto free_list;
1868 error = start_rx(dev);
1869 if (error) goto free_list;
1870 error = dev->phy->start(dev);
1871 if (error) goto free_list;
1872 eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) |
1873 MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE,
1874 MID_MC_S);
1875 /* Tonga uses SBus INTReq1 */
1876 (void) eni_in(MID_ISA); /* clear Midway interrupts */
1877 return 0;
1878
1879free_list:
1880 kfree(eni_dev->free_list);
1881
1882free_irq:
1883 free_irq(eni_dev->irq, dev);
1884
1885out:
1886 return error;
1887}
1888
1889
1890static void eni_close(struct atm_vcc *vcc)
1891{
1892 DPRINTK(">eni_close\n");
1893 if (!ENI_VCC(vcc)) return;
1894 clear_bit(ATM_VF_READY,&vcc->flags);
1895 close_rx(vcc);
1896 close_tx(vcc);
1897 DPRINTK("eni_close: done waiting\n");
1898 /* deallocate memory */
1899 kfree(ENI_VCC(vcc));
1900 vcc->dev_data = NULL;
1901 clear_bit(ATM_VF_ADDR,&vcc->flags);
1902 /*foo();*/
1903}
1904
1905
1906static int eni_open(struct atm_vcc *vcc)
1907{
1908 struct eni_vcc *eni_vcc;
1909 int error;
1910 short vpi = vcc->vpi;
1911 int vci = vcc->vci;
1912
1913 DPRINTK(">eni_open\n");
1914 EVENT("eni_open\n",0,0);
1915 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1916 vcc->dev_data = NULL;
1917 if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
1918 set_bit(ATM_VF_ADDR,&vcc->flags);
1919 if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5)
1920 return -EINVAL;
1921 DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi,
1922 vcc->vci);
1923 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
1924 eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL);
1925 if (!eni_vcc) return -ENOMEM;
1926 vcc->dev_data = eni_vcc;
1927 eni_vcc->tx = NULL; /* for eni_close after open_rx */
1928 if ((error = open_rx_first(vcc))) {
1929 eni_close(vcc);
1930 return error;
1931 }
1932 if ((error = open_tx_first(vcc))) {
1933 eni_close(vcc);
1934 return error;
1935 }
1936 }
1937 if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0;
1938 if ((error = open_rx_second(vcc))) {
1939 eni_close(vcc);
1940 return error;
1941 }
1942 if ((error = open_tx_second(vcc))) {
1943 eni_close(vcc);
1944 return error;
1945 }
1946 set_bit(ATM_VF_READY,&vcc->flags);
1947 /* should power down SUNI while !ref_count @@@ */
1948 return 0;
1949}
1950
1951
1952static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs)
1953{
1954 struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1955 struct eni_tx *tx = ENI_VCC(vcc)->tx;
1956 struct sk_buff *skb;
1957 int error,rate,rsv,shp;
1958
1959 if (qos->txtp.traffic_class == ATM_NONE) return 0;
1960 if (tx == eni_dev->ubr) return -EBADFD;
1961 rate = atm_pcr_goal(&qos->txtp);
1962 if (rate < 0) rate = -rate;
1963 rsv = shp = 0;
1964 if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1;
1965 if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1;
1966 if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1;
1967 if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1;
1968 if (!rsv && !shp) return 0;
1969 error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp);
1970 if (error) return error;
1971 if (shp && !(flgs & ATM_MF_IMMED)) return 0;
1972 /*
1973 * Walk through the send buffer and patch the rate information in all
1974 * segmentation buffer descriptors of this VCC.
1975 */
1976 tasklet_disable(&eni_dev->task);
1977 skb_queue_walk(&eni_dev->tx_queue, skb) {
1978 void __iomem *dsc;
1979
1980 if (ATM_SKB(skb)->vcc != vcc) continue;
1981 dsc = tx->send+ENI_PRV_POS(skb)*4;
1982 writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) |
1983 (tx->prescaler << MID_SEG_PR_SHIFT) |
1984 (tx->resolution << MID_SEG_RATE_SHIFT), dsc);
1985 }
1986 tasklet_enable(&eni_dev->task);
1987 return 0;
1988}
1989
1990
1991static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
1992{
1993 struct eni_dev *eni_dev = ENI_DEV(dev);
1994
1995 if (cmd == ENI_MEMDUMP) {
1996 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1997 printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d "
1998 "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number);
1999 dump(dev);
2000 return 0;
2001 }
2002 if (cmd == ENI_SETMULT) {
2003 struct eni_multipliers mult;
2004
2005 if (!capable(CAP_NET_ADMIN)) return -EPERM;
2006 if (copy_from_user(&mult, arg,
2007 sizeof(struct eni_multipliers)))
2008 return -EFAULT;
2009 if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) ||
2010 mult.tx > 65536 || mult.rx > 65536)
2011 return -EINVAL;
2012 if (mult.tx) eni_dev->tx_mult = mult.tx;
2013 if (mult.rx) eni_dev->rx_mult = mult.rx;
2014 return 0;
2015 }
2016 if (cmd == ATM_SETCIRANGE) {
2017 struct atm_cirange ci;
2018
2019 if (copy_from_user(&ci, arg,sizeof(struct atm_cirange)))
2020 return -EFAULT;
2021 if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) &&
2022 (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX))
2023 return 0;
2024 return -EINVAL;
2025 }
2026 if (!dev->phy->ioctl) return -ENOIOCTLCMD;
2027 return dev->phy->ioctl(dev,cmd,arg);
2028}
2029
2030
2031static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname,
2032 void __user *optval,int optlen)
2033{
2034 return -EINVAL;
2035}
2036
2037
2038static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname,
2039 void __user *optval,unsigned int optlen)
2040{
2041 return -EINVAL;
2042}
2043
2044
2045static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb)
2046{
2047 enum enq_res res;
2048
2049 DPRINTK(">eni_send\n");
2050 if (!ENI_VCC(vcc)->tx) {
2051 if (vcc->pop) vcc->pop(vcc,skb);
2052 else dev_kfree_skb(skb);
2053 return -EINVAL;
2054 }
2055 if (!skb) {
2056 printk(KERN_CRIT "!skb in eni_send ?\n");
2057 if (vcc->pop) vcc->pop(vcc,skb);
2058 return -EINVAL;
2059 }
2060 if (vcc->qos.aal == ATM_AAL0) {
2061 if (skb->len != ATM_CELL_SIZE-1) {
2062 if (vcc->pop) vcc->pop(vcc,skb);
2063 else dev_kfree_skb(skb);
2064 return -EINVAL;
2065 }
2066 *(u32 *) skb->data = htonl(*(u32 *) skb->data);
2067 }
2068submitted++;
2069 ATM_SKB(skb)->vcc = vcc;
2070 tasklet_disable(&ENI_DEV(vcc->dev)->task);
2071 res = do_tx(skb);
2072 tasklet_enable(&ENI_DEV(vcc->dev)->task);
2073 if (res == enq_ok) return 0;
2074 skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb);
2075backlogged++;
2076 tasklet_schedule(&ENI_DEV(vcc->dev)->task);
2077 return 0;
2078}
2079
2080static void eni_phy_put(struct atm_dev *dev,unsigned char value,
2081 unsigned long addr)
2082{
2083 writel(value,ENI_DEV(dev)->phy+addr*4);
2084}
2085
2086
2087
2088static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr)
2089{
2090 return readl(ENI_DEV(dev)->phy+addr*4);
2091}
2092
2093
2094static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page)
2095{
2096 struct hlist_node *node;
2097 struct sock *s;
2098 static const char *signal[] = { "LOST","unknown","okay" };
2099 struct eni_dev *eni_dev = ENI_DEV(dev);
2100 struct atm_vcc *vcc;
2101 int left,i;
2102
2103 left = *pos;
2104 if (!left)
2105 return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, "
2106 "%d cps remaining\n",dev->number,signal[(int) dev->signal],
2107 eni_dev->mem >> 10,eni_dev->tx_bw);
2108 if (!--left)
2109 return sprintf(page,"%4sBursts: TX"
2110#if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \
2111 !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \
2112 !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \
2113 !defined(CONFIG_ATM_ENI_BURST_TX_2W)
2114 " none"
2115#endif
2116#ifdef CONFIG_ATM_ENI_BURST_TX_16W
2117 " 16W"
2118#endif
2119#ifdef CONFIG_ATM_ENI_BURST_TX_8W
2120 " 8W"
2121#endif
2122#ifdef CONFIG_ATM_ENI_BURST_TX_4W
2123 " 4W"
2124#endif
2125#ifdef CONFIG_ATM_ENI_BURST_TX_2W
2126 " 2W"
2127#endif
2128 ", RX"
2129#if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \
2130 !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \
2131 !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \
2132 !defined(CONFIG_ATM_ENI_BURST_RX_2W)
2133 " none"
2134#endif
2135#ifdef CONFIG_ATM_ENI_BURST_RX_16W
2136 " 16W"
2137#endif
2138#ifdef CONFIG_ATM_ENI_BURST_RX_8W
2139 " 8W"
2140#endif
2141#ifdef CONFIG_ATM_ENI_BURST_RX_4W
2142 " 4W"
2143#endif
2144#ifdef CONFIG_ATM_ENI_BURST_RX_2W
2145 " 2W"
2146#endif
2147#ifndef CONFIG_ATM_ENI_TUNE_BURST
2148 " (default)"
2149#endif
2150 "\n","");
2151 if (!--left)
2152 return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n",
2153 "",eni_dev->tx_mult,eni_dev->rx_mult);
2154 for (i = 0; i < NR_CHAN; i++) {
2155 struct eni_tx *tx = eni_dev->tx+i;
2156
2157 if (!tx->send) continue;
2158 if (!--left) {
2159 return sprintf(page,"tx[%d]: 0x%ld-0x%ld "
2160 "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i,
2161 (unsigned long) (tx->send - eni_dev->ram),
2162 tx->send-eni_dev->ram+tx->words*4-1,tx->words*4,
2163 tx->reserved,tx->shaping,
2164 tx == eni_dev->ubr ? " (UBR)" : "");
2165 }
2166 if (--left) continue;
2167 return sprintf(page,"%10sbacklog %u packets\n","",
2168 skb_queue_len(&tx->backlog));
2169 }
2170 read_lock(&vcc_sklist_lock);
2171 for(i = 0; i < VCC_HTABLE_SIZE; ++i) {
2172 struct hlist_head *head = &vcc_hash[i];
2173
2174 sk_for_each(s, node, head) {
2175 struct eni_vcc *eni_vcc;
2176 int length;
2177
2178 vcc = atm_sk(s);
2179 if (vcc->dev != dev)
2180 continue;
2181 eni_vcc = ENI_VCC(vcc);
2182 if (--left) continue;
2183 length = sprintf(page,"vcc %4d: ",vcc->vci);
2184 if (eni_vcc->rx) {
2185 length += sprintf(page+length,"0x%ld-0x%ld "
2186 "(%6ld bytes)",
2187 (unsigned long) (eni_vcc->recv - eni_dev->ram),
2188 eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1,
2189 eni_vcc->words*4);
2190 if (eni_vcc->tx) length += sprintf(page+length,", ");
2191 }
2192 if (eni_vcc->tx)
2193 length += sprintf(page+length,"tx[%d], txing %d bytes",
2194 eni_vcc->tx->index,eni_vcc->txing);
2195 page[length] = '\n';
2196 read_unlock(&vcc_sklist_lock);
2197 return length+1;
2198 }
2199 }
2200 read_unlock(&vcc_sklist_lock);
2201 for (i = 0; i < eni_dev->free_len; i++) {
2202 struct eni_free *fe = eni_dev->free_list+i;
2203 unsigned long offset;
2204
2205 if (--left) continue;
2206 offset = (unsigned long) eni_dev->ram+eni_dev->base_diff;
2207 return sprintf(page,"free %p-%p (%6d bytes)\n",
2208 fe->start-offset,fe->start-offset+(1 << fe->order)-1,
2209 1 << fe->order);
2210 }
2211 return 0;
2212}
2213
2214
2215static const struct atmdev_ops ops = {
2216 .open = eni_open,
2217 .close = eni_close,
2218 .ioctl = eni_ioctl,
2219 .getsockopt = eni_getsockopt,
2220 .setsockopt = eni_setsockopt,
2221 .send = eni_send,
2222 .phy_put = eni_phy_put,
2223 .phy_get = eni_phy_get,
2224 .change_qos = eni_change_qos,
2225 .proc_read = eni_proc_read
2226};
2227
2228
2229static int __devinit eni_init_one(struct pci_dev *pci_dev,
2230 const struct pci_device_id *ent)
2231{
2232 struct atm_dev *dev;
2233 struct eni_dev *eni_dev;
2234 struct eni_zero *zero;
2235 int rc;
2236
2237 rc = pci_enable_device(pci_dev);
2238 if (rc < 0)
2239 goto out;
2240
2241 rc = -ENOMEM;
2242 eni_dev = kmalloc(sizeof(struct eni_dev), GFP_KERNEL);
2243 if (!eni_dev)
2244 goto err_disable;
2245
2246 zero = &eni_dev->zero;
2247 zero->addr = pci_alloc_consistent(pci_dev, ENI_ZEROES_SIZE, &zero->dma);
2248 if (!zero->addr)
2249 goto err_kfree;
2250
2251 dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL);
2252 if (!dev)
2253 goto err_free_consistent;
2254
2255 dev->dev_data = eni_dev;
2256 pci_set_drvdata(pci_dev, dev);
2257 eni_dev->pci_dev = pci_dev;
2258 eni_dev->asic = ent->driver_data;
2259
2260 rc = eni_do_init(dev);
2261 if (rc < 0)
2262 goto err_unregister;
2263
2264 rc = eni_start(dev);
2265 if (rc < 0)
2266 goto err_eni_release;
2267
2268 eni_dev->more = eni_boards;
2269 eni_boards = dev;
2270out:
2271 return rc;
2272
2273err_eni_release:
2274 eni_do_release(dev);
2275err_unregister:
2276 atm_dev_deregister(dev);
2277err_free_consistent:
2278 pci_free_consistent(pci_dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2279err_kfree:
2280 kfree(eni_dev);
2281err_disable:
2282 pci_disable_device(pci_dev);
2283 goto out;
2284}
2285
2286
2287static struct pci_device_id eni_pci_tbl[] = {
2288 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_FPGA), 0 /* FPGA */ },
2289 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_ASIC), 1 /* ASIC */ },
2290 { 0, }
2291};
2292MODULE_DEVICE_TABLE(pci,eni_pci_tbl);
2293
2294
2295static void __devexit eni_remove_one(struct pci_dev *pdev)
2296{
2297 struct atm_dev *dev = pci_get_drvdata(pdev);
2298 struct eni_dev *ed = ENI_DEV(dev);
2299 struct eni_zero *zero = &ed->zero;
2300
2301 eni_do_release(dev);
2302 atm_dev_deregister(dev);
2303 pci_free_consistent(pdev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2304 kfree(ed);
2305 pci_disable_device(pdev);
2306}
2307
2308
2309static struct pci_driver eni_driver = {
2310 .name = DEV_LABEL,
2311 .id_table = eni_pci_tbl,
2312 .probe = eni_init_one,
2313 .remove = __devexit_p(eni_remove_one),
2314};
2315
2316
2317static int __init eni_init(void)
2318{
2319 struct sk_buff *skb; /* dummy for sizeof */
2320
2321 if (sizeof(skb->cb) < sizeof(struct eni_skb_prv)) {
2322 printk(KERN_ERR "eni_detect: skb->cb is too small (%Zd < %Zd)\n",
2323 sizeof(skb->cb),sizeof(struct eni_skb_prv));
2324 return -EIO;
2325 }
2326 return pci_register_driver(&eni_driver);
2327}
2328
2329
2330module_init(eni_init);
2331/* @@@ since exit routine not defined, this module can not be unloaded */
2332
2333MODULE_LICENSE("GPL");