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[PATCH] irq-flags: media: Use the new IRQF_ constants
[deliverable/linux.git] / drivers / atm / eni.c
CommitLineData
1da177e4
LT		 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>
1da177e4
LT		 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 <asm/system.h>
22#include <asm/io.h>
23#include <asm/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)
1da177e4
LT		 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
158static u32 *cpu_zeroes = NULL; /* aligned "magic" zeroes */
159static dma_addr_t zeroes;
160
161/* Read/write registers on card */
162#define eni_in(r) readl(eni_dev->reg+(r)*4)
163#define eni_out(v,r) writel((v),eni_dev->reg+(r)*4)
164
165
166/*-------------------------------- utilities --------------------------------*/
167
168
169static void dump_mem(struct eni_dev *eni_dev)
170{
171 int i;
172
173 for (i = 0; i < eni_dev->free_len; i++)
174 printk(KERN_DEBUG " %d: %p %d\n",i,
175 eni_dev->free_list[i].start,
176 1 << eni_dev->free_list[i].order);
177}
178
179
180static void dump(struct atm_dev *dev)
181{
182 struct eni_dev *eni_dev;
183
184 int i;
185
186 eni_dev = ENI_DEV(dev);
187 printk(KERN_NOTICE "Free memory\n");
188 dump_mem(eni_dev);
189 printk(KERN_NOTICE "TX buffers\n");
190 for (i = 0; i < NR_CHAN; i++)
191 if (eni_dev->tx[i].send)
192 printk(KERN_NOTICE " TX %d @ %p: %ld\n",i,
193 eni_dev->tx[i].send,eni_dev->tx[i].words*4);
194 printk(KERN_NOTICE "RX buffers\n");
195 for (i = 0; i < 1024; i++)
196 if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx)
197 printk(KERN_NOTICE " RX %d @ %p: %ld\n",i,
198 ENI_VCC(eni_dev->rx_map[i])->recv,
199 ENI_VCC(eni_dev->rx_map[i])->words*4);
200 printk(KERN_NOTICE "----\n");
201}
202
203
204static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start,
205 unsigned long size)
206{
207 struct eni_free *list;
208 int len,order;
209
210 DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size);
211 start += eni_dev->base_diff;
212 list = eni_dev->free_list;
213 len = eni_dev->free_len;
214 while (size) {
215 if (len >= eni_dev->free_list_size) {
216 printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n",
217 start,size);
218 break;
219 }
220 for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++);
221 if (MID_MIN_BUF_SIZE > (1 << order)) {
222 printk(KERN_CRIT "eni_put_free: order %d too small\n",
223 order);
224 break;
225 }
226 list[len].start = (void __iomem *) start;
227 list[len].order = order;
228 len++;
229 start += 1 << order;
230 size -= 1 << order;
231 }
232 eni_dev->free_len = len;
233 /*dump_mem(eni_dev);*/
234}
235
236
237static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size)
238{
239 struct eni_free *list;
240 void __iomem *start;
241 int len,i,order,best_order,index;
242
243 list = eni_dev->free_list;
244 len = eni_dev->free_len;
245 if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE;
246 if (*size > MID_MAX_BUF_SIZE) return NULL;
247 for (order = 0; (1 << order) < *size; order++);
248 DPRINTK("trying: %ld->%d\n",*size,order);
249 best_order = 65; /* we don't have more than 2^64 of anything ... */
250 index = 0; /* silence GCC */
251 for (i = 0; i < len; i++)
252 if (list[i].order == order) {
253 best_order = order;
254 index = i;
255 break;
256 }
257 else if (best_order > list[i].order && list[i].order > order) {
258 best_order = list[i].order;
259 index = i;
260 }
261 if (best_order == 65) return NULL;
262 start = list[index].start-eni_dev->base_diff;
263 list[index] = list[--len];
264 eni_dev->free_len = len;
265 *size = 1 << order;
266 eni_put_free(eni_dev,start+*size,(1 << best_order)-*size);
267 DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start);
268 memset_io(start,0,*size); /* never leak data */
269 /*dump_mem(eni_dev);*/
270 return start;
271}
272
273
274static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start,
275 unsigned long size)
276{
277 struct eni_free *list;
278 int len,i,order;
279
280 start += eni_dev->base_diff;
281 list = eni_dev->free_list;
282 len = eni_dev->free_len;
283 for (order = -1; size; order++) size >>= 1;
284 DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order);
285 for (i = 0; i < len; i++)
286 if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) &&
287 list[i].order == order) {
288 DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i,
289 list[i].start,start,1 << order,list[i].order,order);
290 list[i] = list[--len];
291 start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order));
292 order++;
293 i = -1;
294 continue;
295 }
296 if (len >= eni_dev->free_list_size) {
297 printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start,
298 order);
299 return;
300 }
301 list[len].start = start;
302 list[len].order = order;
303 eni_dev->free_len = len+1;
304 /*dump_mem(eni_dev);*/
305}
306
307
308/*----------------------------------- RX ------------------------------------*/
309
310
311#define ENI_VCC_NOS ((struct atm_vcc *) 1)
312
313
314static void rx_ident_err(struct atm_vcc *vcc)
315{
316 struct atm_dev *dev;
317 struct eni_dev *eni_dev;
318 struct eni_vcc *eni_vcc;
319
320 dev = vcc->dev;
321 eni_dev = ENI_DEV(dev);
322 /* immediately halt adapter */
323 eni_out(eni_in(MID_MC_S) &
324 ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S);
325 /* dump useful information */
326 eni_vcc = ENI_VCC(vcc);
327 printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident "
328 "mismatch\n",dev->number);
329 printk(KERN_ALERT " VCI %d, rxing %d, words %ld\n",vcc->vci,
330 eni_vcc->rxing,eni_vcc->words);
331 printk(KERN_ALERT " host descr 0x%lx, rx pos 0x%lx, descr value "
332 "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos,
333 (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4));
334 printk(KERN_ALERT " last %p, servicing %d\n",eni_vcc->last,
335 eni_vcc->servicing);
336 EVENT("---dump ends here---\n",0,0);
337 printk(KERN_NOTICE "---recent events---\n");
338 event_dump();
339 ENI_DEV(dev)->fast = NULL; /* really stop it */
340 ENI_DEV(dev)->slow = NULL;
341 skb_queue_head_init(&ENI_DEV(dev)->rx_queue);
342}
343
344
345static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb,
346 unsigned long skip,unsigned long size,unsigned long eff)
347{
348 struct eni_dev *eni_dev;
349 struct eni_vcc *eni_vcc;
350 u32 dma_rd,dma_wr;
351 u32 dma[RX_DMA_BUF*2];
352 dma_addr_t paddr;
353 unsigned long here;
354 int i,j;
355
356 eni_dev = ENI_DEV(vcc->dev);
357 eni_vcc = ENI_VCC(vcc);
358 paddr = 0; /* GCC, shut up */
359 if (skb) {
360 paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len,
361 PCI_DMA_FROMDEVICE);
362 ENI_PRV_PADDR(skb) = paddr;
363 if (paddr & 3)
364 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has "
365 "mis-aligned RX data (0x%lx)\n",vcc->dev->number,
366 vcc->vci,(unsigned long) paddr);
367 ENI_PRV_SIZE(skb) = size+skip;
368 /* PDU plus descriptor */
369 ATM_SKB(skb)->vcc = vcc;
370 }
371 j = 0;
372 if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */
373 here = (eni_vcc->descr+skip) & (eni_vcc->words-1);
374 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci
375 << MID_DMA_VCI_SHIFT) | MID_DT_JK;
376 j++;
377 }
378 here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1);
379 if (!eff) size += skip;
380 else {
381 unsigned long words;
382
383 if (!size) {
384 DPRINTK("strange things happen ...\n");
385 EVENT("strange things happen ... (skip=%ld,eff=%ld)\n",
386 size,eff);
387 }
388 words = eff;
389 if (paddr & 15) {
390 unsigned long init;
391
392 init = 4-((paddr & 15) >> 2);
393 if (init > words) init = words;
394 dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
395 (vcc->vci << MID_DMA_VCI_SHIFT);
396 dma[j++] = paddr;
397 paddr += init << 2;
398 words -= init;
399 }
400#ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */
401 if (words & ~15) {
402 dma[j++] = MID_DT_16W | ((words >> 4) <<
403 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
404 MID_DMA_VCI_SHIFT);
405 dma[j++] = paddr;
406 paddr += (words & ~15) << 2;
407 words &= 15;
408 }
409#endif
410#ifdef CONFIG_ATM_ENI_BURST_RX_8W /* works only with *some* PCI chipsets ... */
411 if (words & ~7) {
412 dma[j++] = MID_DT_8W | ((words >> 3) <<
413 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
414 MID_DMA_VCI_SHIFT);
415 dma[j++] = paddr;
416 paddr += (words & ~7) << 2;
417 words &= 7;
418 }
419#endif
420#ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */
421 if (words & ~3) {
422 dma[j++] = MID_DT_4W | ((words >> 2) <<
423 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
424 MID_DMA_VCI_SHIFT);
425 dma[j++] = paddr;
426 paddr += (words & ~3) << 2;
427 words &= 3;
428 }
429#endif
430#ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */
431 if (words & ~1) {
432 dma[j++] = MID_DT_2W | ((words >> 1) <<
433 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
434 MID_DMA_VCI_SHIFT);
435 dma[j++] = paddr;
436 paddr += (words & ~1) << 2;
437 words &= 1;
438 }
439#endif
440 if (words) {
441 dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT)
442 | (vcc->vci << MID_DMA_VCI_SHIFT);
443 dma[j++] = paddr;
444 }
445 }
446 if (size != eff) {
447 dma[j++] = (here << MID_DMA_COUNT_SHIFT) |
448 (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK;
449 j++;
450 }
451 if (!j || j > 2*RX_DMA_BUF) {
452 printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n");
453 goto trouble;
454 }
455 dma[j-2] |= MID_DMA_END;
456 j = j >> 1;
457 dma_wr = eni_in(MID_DMA_WR_RX);
458 dma_rd = eni_in(MID_DMA_RD_RX);
459 /*
460 * Can I move the dma_wr pointer by 2j+1 positions without overwriting
461 * data that hasn't been read (position of dma_rd) yet ?
462 */
463 if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */
464 printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n",
465 vcc->dev->number);
466 goto trouble;
467 }
468 for (i = 0; i < j; i++) {
469 writel(dma[i*2],eni_dev->rx_dma+dma_wr*8);
470 writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4);
471 dma_wr = (dma_wr+1) & (NR_DMA_RX-1);
472 }
473 if (skb) {
474 ENI_PRV_POS(skb) = eni_vcc->descr+size+1;
475 skb_queue_tail(&eni_dev->rx_queue,skb);
476 eni_vcc->last = skb;
477rx_enqueued++;
478 }
479 eni_vcc->descr = here;
480 eni_out(dma_wr,MID_DMA_WR_RX);
481 return 0;
482
483trouble:
484 if (paddr)
485 pci_unmap_single(eni_dev->pci_dev,paddr,skb->len,
486 PCI_DMA_FROMDEVICE);
487 if (skb) dev_kfree_skb_irq(skb);
488 return -1;
489}
490
491
492static void discard(struct atm_vcc *vcc,unsigned long size)
493{
494 struct eni_vcc *eni_vcc;
495
496 eni_vcc = ENI_VCC(vcc);
497 EVENT("discard (size=%ld)\n",size,0);
498 while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0);
499 /* could do a full fallback, but that might be more expensive */
500 if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1;
501 else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1);
502}
503
504
505/*
506 * TODO: should check whether direct copies (without DMA setup, dequeuing on
507 * interrupt, etc.) aren't much faster for AAL0
508 */
509
510static int rx_aal0(struct atm_vcc *vcc)
511{
512 struct eni_vcc *eni_vcc;
513 unsigned long descr;
514 unsigned long length;
515 struct sk_buff *skb;
516
517 DPRINTK(">rx_aal0\n");
518 eni_vcc = ENI_VCC(vcc);
519 descr = readl(eni_vcc->recv+eni_vcc->descr*4);
520 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
521 rx_ident_err(vcc);
522 return 1;
523 }
524 if (descr & MID_RED_T) {
525 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
526 vcc->dev->number);
527 length = 0;
528 atomic_inc(&vcc->stats->rx_err);
529 }
530 else {
531 length = ATM_CELL_SIZE-1; /* no HEC */
532 }
533 skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL;
534 if (!skb) {
535 discard(vcc,length >> 2);
536 return 0;
537 }
538 skb_put(skb,length);
a61bbcf2 539 skb_set_timestamp(skb, &eni_vcc->timestamp);
1da177e4
LT		 540 DPRINTK("got len %ld\n",length);
541 if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1;
542 eni_vcc->rxing++;
543 return 0;
544}
545
546
547static int rx_aal5(struct atm_vcc *vcc)
548{
549 struct eni_vcc *eni_vcc;
550 unsigned long descr;
551 unsigned long size,eff,length;
552 struct sk_buff *skb;
553
554 EVENT("rx_aal5\n",0,0);
555 DPRINTK(">rx_aal5\n");
556 eni_vcc = ENI_VCC(vcc);
557 descr = readl(eni_vcc->recv+eni_vcc->descr*4);
558 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
559 rx_ident_err(vcc);
560 return 1;
561 }
562 if (descr & (MID_RED_T | MID_RED_CRC_ERR)) {
563 if (descr & MID_RED_T) {
564 EVENT("empty cell (descr=0x%lx)\n",descr,0);
565 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
566 vcc->dev->number);
567 size = 0;
568 }
569 else {
570 static unsigned long silence = 0;
571
572 if (time_after(jiffies, silence) || silence == 0) {
573 printk(KERN_WARNING DEV_LABEL "(itf %d): "
574 "discarding PDU(s) with CRC error\n",
575 vcc->dev->number);
576 silence = (jiffies+2*HZ)|1;
577 }
578 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
579 EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr,
580 size);
581 }
582 eff = length = 0;
583 atomic_inc(&vcc->stats->rx_err);
584 }
585 else {
586 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
587 DPRINTK("size=%ld\n",size);
588 length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) &
589 (eni_vcc->words-1)))*4) & 0xffff;
590 /* -trailer(2)+header(1) */
591 if (length && length <= (size << 2)-8 && length <=
592 ATM_MAX_AAL5_PDU) eff = (length+3) >> 2;
593 else { /* ^ trailer length (8) */
594 EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr,
595 length);
596 printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU "
597 "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n",
598 vcc->dev->number,vcc->vci,length,size << 2,descr);
599 length = eff = 0;
600 atomic_inc(&vcc->stats->rx_err);
601 }
602 }
603 skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL;
604 if (!skb) {
605 discard(vcc,size);
606 return 0;
607 }
608 skb_put(skb,length);
609 DPRINTK("got len %ld\n",length);
610 if (do_rx_dma(vcc,skb,1,size,eff)) return 1;
611 eni_vcc->rxing++;
612 return 0;
613}
614
615
616static inline int rx_vcc(struct atm_vcc *vcc)
617{
618 void __iomem *vci_dsc;
619 unsigned long tmp;
620 struct eni_vcc *eni_vcc;
621
622 eni_vcc = ENI_VCC(vcc);
623 vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16;
624 EVENT("rx_vcc(1)\n",0,0);
625 while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >>
626 MID_VCI_DESCR_SHIFT)) {
627 EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n",
628 eni_vcc->descr,tmp);
629 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
630 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
631 MID_VCI_DESCR_SHIFT));
632 if (ENI_VCC(vcc)->rx(vcc)) return 1;
633 }
634 /* clear IN_SERVICE flag */
635 writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc);
636 /*
637 * If new data has arrived between evaluating the while condition and
638 * clearing IN_SERVICE, we wouldn't be notified until additional data
639 * follows. So we have to loop again to be sure.
640 */
641 EVENT("rx_vcc(3)\n",0,0);
642 while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR)
643 >> MID_VCI_DESCR_SHIFT)) {
644 EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n",
645 eni_vcc->descr,tmp);
646 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
647 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
648 MID_VCI_DESCR_SHIFT));
649 if (ENI_VCC(vcc)->rx(vcc)) return 1;
650 }
651 return 0;
652}
653
654
655static void poll_rx(struct atm_dev *dev)
656{
657 struct eni_dev *eni_dev;
658 struct atm_vcc *curr;
659
660 eni_dev = ENI_DEV(dev);
661 while ((curr = eni_dev->fast)) {
662 EVENT("poll_rx.fast\n",0,0);
663 if (rx_vcc(curr)) return;
664 eni_dev->fast = ENI_VCC(curr)->next;
665 ENI_VCC(curr)->next = ENI_VCC_NOS;
666 barrier();
667 ENI_VCC(curr)->servicing--;
668 }
669 while ((curr = eni_dev->slow)) {
670 EVENT("poll_rx.slow\n",0,0);
671 if (rx_vcc(curr)) return;
672 eni_dev->slow = ENI_VCC(curr)->next;
673 ENI_VCC(curr)->next = ENI_VCC_NOS;
674 barrier();
675 ENI_VCC(curr)->servicing--;
676 }
677}
678
679
680static void get_service(struct atm_dev *dev)
681{
682 struct eni_dev *eni_dev;
683 struct atm_vcc *vcc;
684 unsigned long vci;
685
686 DPRINTK(">get_service\n");
687 eni_dev = ENI_DEV(dev);
688 while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) {
689 vci = readl(eni_dev->service+eni_dev->serv_read*4);
690 eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1);
691 vcc = eni_dev->rx_map[vci & 1023];
692 if (!vcc) {
693 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not "
694 "found\n",dev->number,vci);
695 continue; /* nasty but we try to go on anyway */
696 /* @@@ nope, doesn't work */
697 }
698 EVENT("getting from service\n",0,0);
699 if (ENI_VCC(vcc)->next != ENI_VCC_NOS) {
700 EVENT("double service\n",0,0);
701 DPRINTK("Grr, servicing VCC %ld twice\n",vci);
702 continue;
703 }
704 do_gettimeofday(&ENI_VCC(vcc)->timestamp);
705 ENI_VCC(vcc)->next = NULL;
706 if (vcc->qos.rxtp.traffic_class == ATM_CBR) {
707 if (eni_dev->fast)
708 ENI_VCC(eni_dev->last_fast)->next = vcc;
709 else eni_dev->fast = vcc;
710 eni_dev->last_fast = vcc;
711 }
712 else {
713 if (eni_dev->slow)
714 ENI_VCC(eni_dev->last_slow)->next = vcc;
715 else eni_dev->slow = vcc;
716 eni_dev->last_slow = vcc;
717 }
718putting++;
719 ENI_VCC(vcc)->servicing++;
720 }
721}
722
723
724static void dequeue_rx(struct atm_dev *dev)
725{
726 struct eni_dev *eni_dev;
727 struct eni_vcc *eni_vcc;
728 struct atm_vcc *vcc;
729 struct sk_buff *skb;
730 void __iomem *vci_dsc;
731 int first;
732
733 eni_dev = ENI_DEV(dev);
734 first = 1;
735 while (1) {
736 skb = skb_dequeue(&eni_dev->rx_queue);
737 if (!skb) {
738 if (first) {
739 DPRINTK(DEV_LABEL "(itf %d): RX but not "
740 "rxing\n",dev->number);
741 EVENT("nothing to dequeue\n",0,0);
742 }
743 break;
744 }
745 EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb),
746 ENI_PRV_POS(skb));
747rx_dequeued++;
748 vcc = ATM_SKB(skb)->vcc;
749 eni_vcc = ENI_VCC(vcc);
750 first = 0;
751 vci_dsc = eni_dev->vci+vcc->vci*16;
752 if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb),
753 (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT,
754 eni_vcc->words)) {
755 EVENT("requeuing\n",0,0);
756 skb_queue_head(&eni_dev->rx_queue,skb);
757 break;
758 }
759 eni_vcc->rxing--;
760 eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1);
761 pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len,
762 PCI_DMA_TODEVICE);
763 if (!skb->len) dev_kfree_skb_irq(skb);
764 else {
765 EVENT("pushing (len=%ld)\n",skb->len,0);
766 if (vcc->qos.aal == ATM_AAL0)
767 *(unsigned long *) skb->data =
768 ntohl(*(unsigned long *) skb->data);
769 memset(skb->cb,0,sizeof(struct eni_skb_prv));
770 vcc->push(vcc,skb);
771 pushed++;
772 }
773 atomic_inc(&vcc->stats->rx);
774 }
775 wake_up(&eni_dev->rx_wait);
776}
777
778
779static int open_rx_first(struct atm_vcc *vcc)
780{
781 struct eni_dev *eni_dev;
782 struct eni_vcc *eni_vcc;
783 unsigned long size;
784
785 DPRINTK("open_rx_first\n");
786 eni_dev = ENI_DEV(vcc->dev);
787 eni_vcc = ENI_VCC(vcc);
788 eni_vcc->rx = NULL;
789 if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0;
790 size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100;
791 if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <=
792 MID_MAX_BUF_SIZE)
793 size = MID_MAX_BUF_SIZE;
794 eni_vcc->recv = eni_alloc_mem(eni_dev,&size);
795 DPRINTK("rx at 0x%lx\n",eni_vcc->recv);
796 eni_vcc->words = size >> 2;
797 if (!eni_vcc->recv) return -ENOBUFS;
798 eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0;
799 eni_vcc->descr = 0;
800 eni_vcc->rx_pos = 0;
801 eni_vcc->rxing = 0;
802 eni_vcc->servicing = 0;
803 eni_vcc->next = ENI_VCC_NOS;
804 return 0;
805}
806
807
808static int open_rx_second(struct atm_vcc *vcc)
809{
810 void __iomem *here;
811 struct eni_dev *eni_dev;
812 struct eni_vcc *eni_vcc;
813 unsigned long size;
814 int order;
815
816 DPRINTK("open_rx_second\n");
817 eni_dev = ENI_DEV(vcc->dev);
818 eni_vcc = ENI_VCC(vcc);
819 if (!eni_vcc->rx) return 0;
820 /* set up VCI descriptor */
821 here = eni_dev->vci+vcc->vci*16;
822 DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4);
823 size = eni_vcc->words >> 8;
824 for (order = -1; size; order++) size >>= 1;
825 writel(0,here+4); /* descr, read = 0 */
826 writel(0,here+8); /* write, state, count = 0 */
827 if (eni_dev->rx_map[vcc->vci])
828 printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already "
829 "in use\n",vcc->dev->number,vcc->vci);
830 eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */
831 writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) <<
832 MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE |
833 (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) <<
834 MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here);
835 return 0;
836}
837
838
839static void close_rx(struct atm_vcc *vcc)
840{
841 DECLARE_WAITQUEUE(wait,current);
842 void __iomem *here;
843 struct eni_dev *eni_dev;
844 struct eni_vcc *eni_vcc;
845
846 eni_vcc = ENI_VCC(vcc);
847 if (!eni_vcc->rx) return;
848 eni_dev = ENI_DEV(vcc->dev);
849 if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) {
850 here = eni_dev->vci+vcc->vci*16;
851 /* block receiver */
852 writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH <<
853 MID_VCI_MODE_SHIFT),here);
854 /* wait for receiver to become idle */
855 udelay(27);
856 /* discard pending cell */
857 writel(readl(here) & ~MID_VCI_IN_SERVICE,here);
858 /* don't accept any new ones */
859 eni_dev->rx_map[vcc->vci] = NULL;
860 /* wait for RX queue to drain */
861 DPRINTK("eni_close: waiting for RX ...\n");
862 EVENT("RX closing\n",0,0);
863 add_wait_queue(&eni_dev->rx_wait,&wait);
864 set_current_state(TASK_UNINTERRUPTIBLE);
865 barrier();
866 for (;;) {
867 /* transition service->rx: rxing++, servicing-- */
868 if (!eni_vcc->servicing) {
869 barrier();
870 if (!eni_vcc->rxing) break;
871 }
872 EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing,
873 eni_vcc->servicing);
874 printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing,
875 eni_vcc->rxing);
876 schedule();
877 set_current_state(TASK_UNINTERRUPTIBLE);
878 }
879 for (;;) {
880 int at_end;
881 u32 tmp;
882
883 tasklet_disable(&eni_dev->task);
884 tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ;
885 at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT;
886 tasklet_enable(&eni_dev->task);
887 if (at_end) break;
888 EVENT("drain discard (host 0x%lx, nic 0x%lx)\n",
889 eni_vcc->rx_pos,tmp);
890 printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n",
891 eni_vcc->rx_pos,tmp);
892 schedule();
893 set_current_state(TASK_UNINTERRUPTIBLE);
894 }
895 set_current_state(TASK_RUNNING);
896 remove_wait_queue(&eni_dev->rx_wait,&wait);
897 }
898 eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2);
899 eni_vcc->rx = NULL;
900}
901
902
903static int start_rx(struct atm_dev *dev)
904{
905 struct eni_dev *eni_dev;
906
907 eni_dev = ENI_DEV(dev);
908 eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL);
909 if (!eni_dev->rx_map) {
910 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
911 dev->number);
912 free_page((unsigned long) eni_dev->free_list);
913 return -ENOMEM;
914 }
915 memset(eni_dev->rx_map,0,PAGE_SIZE);
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->len - skb->data_len);
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 = (TS_CLOCK+div-1)/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 struct eni_dev *eni_dev;
1473
1474 DPRINTK(">bug_int\n");
1475 eni_dev = ENI_DEV(dev);
1476 if (reason & MID_DMA_ERR_ACK)
1477 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1478 "error\n",dev->number);
1479 if (reason & MID_TX_IDENT_MISM)
1480 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident "
1481 "mismatch\n",dev->number);
1482 if (reason & MID_TX_DMA_OVFL)
1483 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1484 "overflow\n",dev->number);
1485 EVENT("---dump ends here---\n",0,0);
1486 printk(KERN_NOTICE "---recent events---\n");
1487 event_dump();
1488}
1489
1490
1491static irqreturn_t eni_int(int irq,void *dev_id,struct pt_regs *regs)
1492{
1493 struct atm_dev *dev;
1494 struct eni_dev *eni_dev;
1495 u32 reason;
1496
1497 DPRINTK(">eni_int\n");
1498 dev = dev_id;
1499 eni_dev = ENI_DEV(dev);
1500 reason = eni_in(MID_ISA);
1501 DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason);
1502 /*
1503 * Must handle these two right now, because reading ISA doesn't clear
1504 * them, so they re-occur and we never make it to the tasklet. Since
1505 * they're rare, we don't mind the occasional invocation of eni_tasklet
1506 * with eni_dev->events == 0.
1507 */
1508 if (reason & MID_STAT_OVFL) {
1509 EVENT("stat overflow\n",0,0);
1510 eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH;
1511 }
1512 if (reason & MID_SUNI_INT) {
1513 EVENT("SUNI int\n",0,0);
1514 dev->phy->interrupt(dev);
1515#if 0
1516 foo();
1517#endif
1518 }
1519 spin_lock(&eni_dev->lock);
1520 eni_dev->events |= reason;
1521 spin_unlock(&eni_dev->lock);
1522 tasklet_schedule(&eni_dev->task);
1523 return IRQ_HANDLED;
1524}
1525
1526
1527static void eni_tasklet(unsigned long data)
1528{
1529 struct atm_dev *dev = (struct atm_dev *) data;
1530 struct eni_dev *eni_dev = ENI_DEV(dev);
1531 unsigned long flags;
1532 u32 events;
1533
1534 DPRINTK("eni_tasklet (dev %p)\n",dev);
1535 spin_lock_irqsave(&eni_dev->lock,flags);
1536 events = xchg(&eni_dev->events,0);
1537 spin_unlock_irqrestore(&eni_dev->lock,flags);
1538 if (events & MID_RX_DMA_COMPLETE) {
1539 EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0);
1540 dequeue_rx(dev);
1541 EVENT("dequeue_rx done, starting poll_rx\n",0,0);
1542 poll_rx(dev);
1543 EVENT("poll_rx done\n",0,0);
1544 /* poll_tx ? */
1545 }
1546 if (events & MID_SERVICE) {
1547 EVENT("INT: service, starting get_service\n",0,0);
1548 get_service(dev);
1549 EVENT("get_service done, starting poll_rx\n",0,0);
1550 poll_rx(dev);
1551 EVENT("poll_rx done\n",0,0);
1552 }
1553 if (events & MID_TX_DMA_COMPLETE) {
1554 EVENT("INT: TX DMA COMPLETE\n",0,0);
1555 dequeue_tx(dev);
1556 }
1557 if (events & MID_TX_COMPLETE) {
1558 EVENT("INT: TX COMPLETE\n",0,0);
1559tx_complete++;
1560 wake_up(&eni_dev->tx_wait);
1561 /* poll_rx ? */
1562 }
1563 if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) {
1564 EVENT("bug interrupt\n",0,0);
1565 bug_int(dev,events);
1566 }
1567 poll_tx(dev);
1568}
1569
1570
1571/*--------------------------------- entries ---------------------------------*/
1572
1573
1574static const char *media_name[] __devinitdata = {
1575 "MMF", "SMF", "MMF", "03?", /* 0- 3 */
1576 "UTP", "05?", "06?", "07?", /* 4- 7 */
1577 "TAXI","09?", "10?", "11?", /* 8-11 */
1578 "12?", "13?", "14?", "15?", /* 12-15 */
1579 "MMF", "SMF", "18?", "19?", /* 16-19 */
1580 "UTP", "21?", "22?", "23?", /* 20-23 */
1581 "24?", "25?", "26?", "27?", /* 24-27 */
1582 "28?", "29?", "30?", "31?" /* 28-31 */
1583};
1584
1585
1586#define SET_SEPROM \
1587 ({ if (!error && !pci_error) { \
1588 pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \
1589 udelay(10); /* 10 usecs */ \
1590 } })
1591#define GET_SEPROM \
1592 ({ if (!error && !pci_error) { \
1593 pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \
1594 udelay(10); /* 10 usecs */ \
1595 } })
1596
1597
1598static int __devinit get_esi_asic(struct atm_dev *dev)
1599{
1600 struct eni_dev *eni_dev;
1601 unsigned char tonga;
1602 int error,failed,pci_error;
1603 int address,i,j;
1604
1605 eni_dev = ENI_DEV(dev);
1606 error = pci_error = 0;
1607 tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK;
1608 SET_SEPROM;
1609 for (i = 0; i < ESI_LEN && !error && !pci_error; i++) {
1610 /* start operation */
1611 tonga |= SEPROM_DATA;
1612 SET_SEPROM;
1613 tonga |= SEPROM_CLK;
1614 SET_SEPROM;
1615 tonga &= ~SEPROM_DATA;
1616 SET_SEPROM;
1617 tonga &= ~SEPROM_CLK;
1618 SET_SEPROM;
1619 /* send address */
1620 address = ((i+SEPROM_ESI_BASE) << 1)+1;
1621 for (j = 7; j >= 0; j--) {
1622 tonga = (address >> j) & 1 ? tonga | SEPROM_DATA :
1623 tonga & ~SEPROM_DATA;
1624 SET_SEPROM;
1625 tonga |= SEPROM_CLK;
1626 SET_SEPROM;
1627 tonga &= ~SEPROM_CLK;
1628 SET_SEPROM;
1629 }
1630 /* get ack */
1631 tonga |= SEPROM_DATA;
1632 SET_SEPROM;
1633 tonga |= SEPROM_CLK;
1634 SET_SEPROM;
1635 GET_SEPROM;
1636 failed = tonga & SEPROM_DATA;
1637 tonga &= ~SEPROM_CLK;
1638 SET_SEPROM;
1639 tonga |= SEPROM_DATA;
1640 SET_SEPROM;
1641 if (failed) error = -EIO;
1642 else {
1643 dev->esi[i] = 0;
1644 for (j = 7; j >= 0; j--) {
1645 dev->esi[i] <<= 1;
1646 tonga |= SEPROM_DATA;
1647 SET_SEPROM;
1648 tonga |= SEPROM_CLK;
1649 SET_SEPROM;
1650 GET_SEPROM;
1651 if (tonga & SEPROM_DATA) dev->esi[i] |= 1;
1652 tonga &= ~SEPROM_CLK;
1653 SET_SEPROM;
1654 tonga |= SEPROM_DATA;
1655 SET_SEPROM;
1656 }
1657 /* get ack */
1658 tonga |= SEPROM_DATA;
1659 SET_SEPROM;
1660 tonga |= SEPROM_CLK;
1661 SET_SEPROM;
1662 GET_SEPROM;
1663 if (!(tonga & SEPROM_DATA)) error = -EIO;
1664 tonga &= ~SEPROM_CLK;
1665 SET_SEPROM;
1666 tonga |= SEPROM_DATA;
1667 SET_SEPROM;
1668 }
1669 /* stop operation */
1670 tonga &= ~SEPROM_DATA;
1671 SET_SEPROM;
1672 tonga |= SEPROM_CLK;
1673 SET_SEPROM;
1674 tonga |= SEPROM_DATA;
1675 SET_SEPROM;
1676 }
1677 if (pci_error) {
1678 printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI "
1679 "(0x%02x)\n",dev->number,pci_error);
1680 error = -EIO;
1681 }
1682 return error;
1683}
1684
1685
1686#undef SET_SEPROM
1687#undef GET_SEPROM
1688
1689
1690static int __devinit get_esi_fpga(struct atm_dev *dev, void __iomem *base)
1691{
1692 void __iomem *mac_base;
1693 int i;
1694
1695 mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom);
1696 for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3));
1697 return 0;
1698}
1699
1700
1701static int __devinit eni_do_init(struct atm_dev *dev)
1702{
1703 struct midway_eprom __iomem *eprom;
1704 struct eni_dev *eni_dev;
1705 struct pci_dev *pci_dev;
1706 unsigned long real_base;
1707 void __iomem *base;
1708 unsigned char revision;
1709 int error,i,last;
1710
1711 DPRINTK(">eni_init\n");
1712 dev->ci_range.vpi_bits = 0;
1713 dev->ci_range.vci_bits = NR_VCI_LD;
1714 dev->link_rate = ATM_OC3_PCR;
1715 eni_dev = ENI_DEV(dev);
1716 pci_dev = eni_dev->pci_dev;
1717 real_base = pci_resource_start(pci_dev, 0);
1718 eni_dev->irq = pci_dev->irq;
1719 error = pci_read_config_byte(pci_dev,PCI_REVISION_ID,&revision);
1720 if (error) {
1721 printk(KERN_ERR DEV_LABEL "(itf %d): init error 0x%02x\n",
1722 dev->number,error);
1723 return -EINVAL;
1724 }
1725 if ((error = pci_write_config_word(pci_dev,PCI_COMMAND,
1726 PCI_COMMAND_MEMORY |
1727 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1728 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory "
1729 "(0x%02x)\n",dev->number,error);
1730 return -EIO;
1731 }
1732 printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,",
1733 dev->number,revision,real_base,eni_dev->irq);
1734 if (!(base = ioremap_nocache(real_base,MAP_MAX_SIZE))) {
1735 printk("\n");
1736 printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page "
1737 "mapping\n",dev->number);
1738 return error;
1739 }
1740 eni_dev->base_diff = real_base - (unsigned long) base;
1741 /* id may not be present in ASIC Tonga boards - check this @@@ */
1742 if (!eni_dev->asic) {
1743 eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom));
1744 if (readl(&eprom->magic) != ENI155_MAGIC) {
1745 printk("\n");
1746 printk(KERN_ERR KERN_ERR DEV_LABEL "(itf %d): bad "
1747 "magic - expected 0x%x, got 0x%x\n",dev->number,
1748 ENI155_MAGIC,(unsigned) readl(&eprom->magic));
1749 return -EINVAL;
1750 }
1751 }
1752 eni_dev->phy = base+PHY_BASE;
1753 eni_dev->reg = base+REG_BASE;
1754 eni_dev->ram = base+RAM_BASE;
1755 last = MAP_MAX_SIZE-RAM_BASE;
1756 for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) {
1757 writel(0x55555555,eni_dev->ram+i);
1758 if (readl(eni_dev->ram+i) != 0x55555555) last = i;
1759 else {
1760 writel(0xAAAAAAAA,eni_dev->ram+i);
1761 if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i;
1762 else writel(i,eni_dev->ram+i);
1763 }
1764 }
1765 for (i = 0; i < last; i += RAM_INCREMENT)
1766 if (readl(eni_dev->ram+i) != i) break;
1767 eni_dev->mem = i;
1768 memset_io(eni_dev->ram,0,eni_dev->mem);
1769 /* TODO: should shrink allocation now */
1770 printk("mem=%dkB (",eni_dev->mem >> 10);
1771 /* TODO: check for non-SUNI, check for TAXI ? */
1772 if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) {
1773 printk(")\n");
1774 printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n",
1775 dev->number,(unsigned) eni_in(MID_RES_ID_MCON));
1776 return -EINVAL;
1777 }
1778 error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base);
1779 if (error) return error;
1780 for (i = 0; i < ESI_LEN; i++)
1781 printk("%s%02X",i ? "-" : "",dev->esi[i]);
1782 printk(")\n");
1783 printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number,
1784 eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA",
1785 media_name[eni_in(MID_RES_ID_MCON) & DAUGTHER_ID]);
1786 return suni_init(dev);
1787}
1788
1789
1790static int __devinit eni_start(struct atm_dev *dev)
1791{
1792 struct eni_dev *eni_dev;
1793
1794 void __iomem *buf;
1795 unsigned long buffer_mem;
1796 int error;
1797
1798 DPRINTK(">eni_start\n");
1799 eni_dev = ENI_DEV(dev);
1800 if (request_irq(eni_dev->irq,&eni_int,SA_SHIRQ,DEV_LABEL,dev)) {
1801 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
1802 dev->number,eni_dev->irq);
758d11bf
AM		 1803 error = -EAGAIN;
1804 goto out;
1da177e4 1805 }
1da177e4
LT		 1806 pci_set_master(eni_dev->pci_dev);
1807 if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND,
1808 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
1809 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1810 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+"
1811 "master (0x%02x)\n",dev->number,error);
758d11bf 1812 goto free_irq;
1da177e4
LT		 1813 }
1814 if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,
1815 END_SWAP_DMA))) {
1816 printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap "
1817 "(0x%02x)\n",dev->number,error);
758d11bf 1818 goto free_irq;
1da177e4
LT		 1819 }
1820 /* determine addresses of internal tables */
1821 eni_dev->vci = eni_dev->ram;
1822 eni_dev->rx_dma = eni_dev->ram+NR_VCI*16;
1823 eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8;
1824 eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8;
1825 buf = eni_dev->service+NR_SERVICE*4;
1826 DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n",
1827 eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma,
1828 eni_dev->service,buf);
1829 spin_lock_init(&eni_dev->lock);
1830 tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev);
1831 eni_dev->events = 0;
1832 /* initialize memory management */
1833 buffer_mem = eni_dev->mem - (buf - eni_dev->ram);
1834 eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2;
1835 eni_dev->free_list = (struct eni_free *) kmalloc(
1836 sizeof(struct eni_free)*(eni_dev->free_list_size+1),GFP_KERNEL);
1837 if (!eni_dev->free_list) {
1838 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
1839 dev->number);
758d11bf
AM		 1840 error = -ENOMEM;
1841 goto free_irq;
1da177e4
LT		 1842 }
1843 eni_dev->free_len = 0;
1844 eni_put_free(eni_dev,buf,buffer_mem);
1845 memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */
1846 /*
1847 * byte_addr free (k)
1848 * 0x00000000 512 VCI table
1849 * 0x00004000 496 RX DMA
1850 * 0x00005000 492 TX DMA
1851 * 0x00006000 488 service list
1852 * 0x00007000 484 buffers
1853 * 0x00080000 0 end (512kB)
1854 */
1855 eni_out(0xffffffff,MID_IE);
1856 error = start_tx(dev);
758d11bf 1857 if (error) goto free_list;
1da177e4 1858 error = start_rx(dev);
758d11bf 1859 if (error) goto free_list;
1da177e4 1860 error = dev->phy->start(dev);
758d11bf 1861 if (error) goto free_list;
1da177e4
LT		 1862 eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) |
1863 MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE,
1864 MID_MC_S);
1865 /* Tonga uses SBus INTReq1 */
1866 (void) eni_in(MID_ISA); /* clear Midway interrupts */
1867 return 0;
758d11bf
AM		 1868
1869free_list:
1870 kfree(eni_dev->free_list);
1871
1872free_irq:
1873 free_irq(eni_dev->irq, eni_dev);
1874
1875out:
1876 return error;
1da177e4
LT		 1877}
1878
1879
1880static void eni_close(struct atm_vcc *vcc)
1881{
1882 DPRINTK(">eni_close\n");
1883 if (!ENI_VCC(vcc)) return;
1884 clear_bit(ATM_VF_READY,&vcc->flags);
1885 close_rx(vcc);
1886 close_tx(vcc);
1887 DPRINTK("eni_close: done waiting\n");
1888 /* deallocate memory */
1889 kfree(ENI_VCC(vcc));
1890 vcc->dev_data = NULL;
1891 clear_bit(ATM_VF_ADDR,&vcc->flags);
1892 /*foo();*/
1893}
1894
1895
1896static int eni_open(struct atm_vcc *vcc)
1897{
1898 struct eni_dev *eni_dev;
1899 struct eni_vcc *eni_vcc;
1900 int error;
1901 short vpi = vcc->vpi;
1902 int vci = vcc->vci;
1903
1904 DPRINTK(">eni_open\n");
1905 EVENT("eni_open\n",0,0);
1906 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1907 vcc->dev_data = NULL;
1908 eni_dev = ENI_DEV(vcc->dev);
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,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 = (struct 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,&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_VENDOR_ID_EF, PCI_DEVICE_ID_EF_ATM_FPGA, PCI_ANY_ID, PCI_ANY_ID,
2269 0, 0, 0 /* FPGA */ },
2270 { PCI_VENDOR_ID_EF, PCI_DEVICE_ID_EF_ATM_ASIC, PCI_ANY_ID, PCI_ANY_ID,
2271 0, 0, 1 /* ASIC */ },
2272 { 0, }
2273};
2274MODULE_DEVICE_TABLE(pci,eni_pci_tbl);
2275
2276
2277static void __devexit eni_remove_one(struct pci_dev *pci_dev)
2278{
2279 /* grrr */
2280}
2281
2282
2283static struct pci_driver eni_driver = {
2284 .name = DEV_LABEL,
2285 .id_table = eni_pci_tbl,
2286 .probe = eni_init_one,
2287 .remove = __devexit_p(eni_remove_one),
2288};
2289
2290
2291static int __init eni_init(void)
2292{
2293 struct sk_buff *skb; /* dummy for sizeof */
2294
2295 if (sizeof(skb->cb) < sizeof(struct eni_skb_prv)) {
2296 printk(KERN_ERR "eni_detect: skb->cb is too small (%Zd < %Zd)\n",
2297 sizeof(skb->cb),sizeof(struct eni_skb_prv));
2298 return -EIO;
2299 }
2300 return pci_register_driver(&eni_driver);
2301}
2302
2303
2304module_init(eni_init);
2305/* @@@ since exit routine not defined, this module can not be unloaded */
2306
2307MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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