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dma_page_list ->base_address is a userland pointer
[pv_ops_mirror.git] / drivers / atm / eni.c
blob41b2204ebc6e1341dbc4b12d256309e0a33c3f18
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 <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)
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
85 static 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
108 static const char *ev[EV];
109 static unsigned long ev_a[EV],ev_b[EV];
110 static int ec = 0;
111
112
113 static 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
122 static 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
152 static 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
156 static struct atm_dev *eni_boards = NULL;
157
158 static u32 *cpu_zeroes = NULL; /* aligned "magic" zeroes */
159 static 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
169 static 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
180 static 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
204 static 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
237 static 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
274 static 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
314 static 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
345 static 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;
477 rx_enqueued++;
478 }
479 eni_vcc->descr = here;
480 eni_out(dma_wr,MID_DMA_WR_RX);
481 return 0;
482
483 trouble:
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
492 static 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
510 static 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);
539 skb->tstamp = eni_vcc->timestamp;
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
547 static 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
616 static 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
655 static 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
680 static 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 ENI_VCC(vcc)->timestamp = ktime_get_real();
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 }
718 putting++;
719 ENI_VCC(vcc)->servicing++;
720 }
721 }
722
723
724 static 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));
747 rx_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
779 static 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
808 static 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
839 static 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
903 static 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 eni_dev->rx_mult = DEFAULT_RX_MULT;
916 eni_dev->fast = eni_dev->last_fast = NULL;
917 eni_dev->slow = eni_dev->last_slow = NULL;
918 init_waitqueue_head(&eni_dev->rx_wait);
919 skb_queue_head_init(&eni_dev->rx_queue);
920 eni_dev->serv_read = eni_in(MID_SERV_WRITE);
921 eni_out(0,MID_DMA_WR_RX);
922 return 0;
923 }
924
925
926 /*----------------------------------- TX ------------------------------------*/
927
928
929 enum enq_res { enq_ok,enq_next,enq_jam };
930
931
932 static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr,
933 u32 size)
934 {
935 u32 init,words;
936
937 DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size);
938 EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size);
939 #if 0 /* don't complain anymore */
940 if (paddr & 3)
941 printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr);
942 if (size & 3)
943 printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size);
944 #endif
945 if (paddr & 3) {
946 init = 4-(paddr & 3);
947 if (init > size || size < 7) init = size;
948 DPRINTK("put_dma: %lx DMA: %d/%d bytes\n",
949 (unsigned long) paddr,init,size);
950 dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) |
951 (chan << MID_DMA_CHAN_SHIFT);
952 dma[(*j)++] = paddr;
953 paddr += init;
954 size -= init;
955 }
956 words = size >> 2;
957 size &= 3;
958 if (words && (paddr & 31)) {
959 init = 8-((paddr & 31) >> 2);
960 if (init > words) init = words;
961 DPRINTK("put_dma: %lx DMA: %d/%d words\n",
962 (unsigned long) paddr,init,words);
963 dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
964 (chan << MID_DMA_CHAN_SHIFT);
965 dma[(*j)++] = paddr;
966 paddr += init << 2;
967 words -= init;
968 }
969 #ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */
970 if (words & ~15) {
971 DPRINTK("put_dma: %lx DMA: %d*16/%d words\n",
972 (unsigned long) paddr,words >> 4,words);
973 dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT)
974 | (chan << MID_DMA_CHAN_SHIFT);
975 dma[(*j)++] = paddr;
976 paddr += (words & ~15) << 2;
977 words &= 15;
978 }
979 #endif
980 #ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */
981 if (words & ~7) {
982 DPRINTK("put_dma: %lx DMA: %d*8/%d words\n",
983 (unsigned long) paddr,words >> 3,words);
984 dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT)
985 | (chan << MID_DMA_CHAN_SHIFT);
986 dma[(*j)++] = paddr;
987 paddr += (words & ~7) << 2;
988 words &= 7;
989 }
990 #endif
991 #ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */
992 if (words & ~3) {
993 DPRINTK("put_dma: %lx DMA: %d*4/%d words\n",
994 (unsigned long) paddr,words >> 2,words);
995 dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT)
996 | (chan << MID_DMA_CHAN_SHIFT);
997 dma[(*j)++] = paddr;
998 paddr += (words & ~3) << 2;
999 words &= 3;
1000 }
1001 #endif
1002 #ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */
1003 if (words & ~1) {
1004 DPRINTK("put_dma: %lx DMA: %d*2/%d words\n",
1005 (unsigned long) paddr,words >> 1,words);
1006 dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT)
1007 | (chan << MID_DMA_CHAN_SHIFT);
1008 dma[(*j)++] = paddr;
1009 paddr += (words & ~1) << 2;
1010 words &= 1;
1011 }
1012 #endif
1013 if (words) {
1014 DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr,
1015 words);
1016 dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) |
1017 (chan << MID_DMA_CHAN_SHIFT);
1018 dma[(*j)++] = paddr;
1019 paddr += words << 2;
1020 }
1021 if (size) {
1022 DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr,
1023 size);
1024 dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) |
1025 (chan << MID_DMA_CHAN_SHIFT);
1026 dma[(*j)++] = paddr;
1027 }
1028 }
1029
1030
1031 static enum enq_res do_tx(struct sk_buff *skb)
1032 {
1033 struct atm_vcc *vcc;
1034 struct eni_dev *eni_dev;
1035 struct eni_vcc *eni_vcc;
1036 struct eni_tx *tx;
1037 dma_addr_t paddr;
1038 u32 dma_rd,dma_wr;
1039 u32 size; /* in words */
1040 int aal5,dma_size,i,j;
1041
1042 DPRINTK(">do_tx\n");
1043 NULLCHECK(skb);
1044 EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len);
1045 vcc = ATM_SKB(skb)->vcc;
1046 NULLCHECK(vcc);
1047 eni_dev = ENI_DEV(vcc->dev);
1048 NULLCHECK(eni_dev);
1049 eni_vcc = ENI_VCC(vcc);
1050 tx = eni_vcc->tx;
1051 NULLCHECK(tx);
1052 #if 0 /* Enable this for testing with the "align" program */
1053 {
1054 unsigned int hack = *((char *) skb->data)-'0';
1055
1056 if (hack < 8) {
1057 skb->data += hack;
1058 skb->len -= hack;
1059 }
1060 }
1061 #endif
1062 #if 0 /* should work now */
1063 if ((unsigned long) skb->data & 3)
1064 printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned "
1065 "TX data\n",vcc->dev->number,vcc->vci);
1066 #endif
1067 /*
1068 * Potential future IP speedup: make hard_header big enough to put
1069 * segmentation descriptor directly into PDU. Saves: 4 slave writes,
1070 * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-)
1071 */
1072
1073 aal5 = vcc->qos.aal == ATM_AAL5;
1074 /* check space in buffer */
1075 if (!aal5)
1076 size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE;
1077 /* cell without HEC plus segmentation header (includes
1078 four-byte cell header) */
1079 else {
1080 size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1;
1081 /* add AAL5 trailer */
1082 size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE;
1083 /* add segmentation header */
1084 }
1085 /*
1086 * Can I move tx_pos by size bytes without getting closer than TX_GAP
1087 * to the read pointer ? TX_GAP means to leave some space for what
1088 * the manual calls "too close".
1089 */
1090 if (!NEPMOK(tx->tx_pos,size+TX_GAP,
1091 eni_in(MID_TX_RDPTR(tx->index)),tx->words)) {
1092 DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n",
1093 vcc->dev->number,size);
1094 return enq_next;
1095 }
1096 /* check DMA */
1097 dma_wr = eni_in(MID_DMA_WR_TX);
1098 dma_rd = eni_in(MID_DMA_RD_TX);
1099 dma_size = 3; /* JK for descriptor and final fill, plus final size
1100 mis-alignment fix */
1101 DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags);
1102 if (!skb_shinfo(skb)->nr_frags) dma_size += 5;
1103 else dma_size += 5*(skb_shinfo(skb)->nr_frags+1);
1104 if (dma_size > TX_DMA_BUF) {
1105 printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries "
1106 "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF);
1107 }
1108 DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos);
1109 if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) <
1110 dma_size) {
1111 printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n",
1112 vcc->dev->number);
1113 return enq_jam;
1114 }
1115 paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len,
1116 PCI_DMA_TODEVICE);
1117 ENI_PRV_PADDR(skb) = paddr;
1118 /* prepare DMA queue entries */
1119 j = 0;
1120 eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) <<
1121 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1122 MID_DT_JK;
1123 j++;
1124 if (!skb_shinfo(skb)->nr_frags)
1125 if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len);
1126 else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4);
1127 else {
1128 DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */
1129 for (i = -1; i < skb_shinfo(skb)->nr_frags; i++)
1130 if (i == -1)
1131 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1132 skb->data,
1133 skb->len - skb->data_len);
1134 else
1135 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1136 skb_shinfo(skb)->frags[i].page + skb_shinfo(skb)->frags[i].page_offset,
1137 skb_shinfo(skb)->frags[i].size);
1138 }
1139 if (skb->len & 3)
1140 put_dma(tx->index,eni_dev->dma,&j,zeroes,4-(skb->len & 3));
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);
1174 queued++;
1175 return enq_ok;
1176 }
1177
1178
1179 static 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);
1195 requeued++;
1196 if (res == enq_jam) return;
1197 break;
1198 }
1199 }
1200 }
1201
1202
1203 static 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);
1232 dma_complete++;
1233 }
1234 }
1235
1236
1237 static 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
1247 static 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 = (TS_CLOCK+div-1)/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
1284 static 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
1372 static 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
1381 static int open_tx_second(struct atm_vcc *vcc)
1382 {
1383 return 0; /* nothing to do */
1384 }
1385
1386
1387 static 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
1430 static 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
1456 static void foo(void)
1457 {
1458 printk(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);
1463 if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost);
1464 }
1465
1466 #endif
1467
1468
1469 static void bug_int(struct atm_dev *dev,unsigned long reason)
1470 {
1471 struct eni_dev *eni_dev;
1472
1473 DPRINTK(">bug_int\n");
1474 eni_dev = ENI_DEV(dev);
1475 if (reason & MID_DMA_ERR_ACK)
1476 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1477 "error\n",dev->number);
1478 if (reason & MID_TX_IDENT_MISM)
1479 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident "
1480 "mismatch\n",dev->number);
1481 if (reason & MID_TX_DMA_OVFL)
1482 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1483 "overflow\n",dev->number);
1484 EVENT("---dump ends here---\n",0,0);
1485 printk(KERN_NOTICE "---recent events---\n");
1486 event_dump();
1487 }
1488
1489
1490 static irqreturn_t eni_int(int irq,void *dev_id)
1491 {
1492 struct atm_dev *dev;
1493 struct eni_dev *eni_dev;
1494 u32 reason;
1495
1496 DPRINTK(">eni_int\n");
1497 dev = dev_id;
1498 eni_dev = ENI_DEV(dev);
1499 reason = eni_in(MID_ISA);
1500 DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason);
1501 /*
1502 * Must handle these two right now, because reading ISA doesn't clear
1503 * them, so they re-occur and we never make it to the tasklet. Since
1504 * they're rare, we don't mind the occasional invocation of eni_tasklet
1505 * with eni_dev->events == 0.
1506 */
1507 if (reason & MID_STAT_OVFL) {
1508 EVENT("stat overflow\n",0,0);
1509 eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH;
1510 }
1511 if (reason & MID_SUNI_INT) {
1512 EVENT("SUNI int\n",0,0);
1513 dev->phy->interrupt(dev);
1514 #if 0
1515 foo();
1516 #endif
1517 }
1518 spin_lock(&eni_dev->lock);
1519 eni_dev->events |= reason;
1520 spin_unlock(&eni_dev->lock);
1521 tasklet_schedule(&eni_dev->task);
1522 return IRQ_HANDLED;
1523 }
1524
1525
1526 static void eni_tasklet(unsigned long data)
1527 {
1528 struct atm_dev *dev = (struct atm_dev *) data;
1529 struct eni_dev *eni_dev = ENI_DEV(dev);
1530 unsigned long flags;
1531 u32 events;
1532
1533 DPRINTK("eni_tasklet (dev %p)\n",dev);
1534 spin_lock_irqsave(&eni_dev->lock,flags);
1535 events = xchg(&eni_dev->events,0);
1536 spin_unlock_irqrestore(&eni_dev->lock,flags);
1537 if (events & MID_RX_DMA_COMPLETE) {
1538 EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0);
1539 dequeue_rx(dev);
1540 EVENT("dequeue_rx done, starting poll_rx\n",0,0);
1541 poll_rx(dev);
1542 EVENT("poll_rx done\n",0,0);
1543 /* poll_tx ? */
1544 }
1545 if (events & MID_SERVICE) {
1546 EVENT("INT: service, starting get_service\n",0,0);
1547 get_service(dev);
1548 EVENT("get_service done, starting poll_rx\n",0,0);
1549 poll_rx(dev);
1550 EVENT("poll_rx done\n",0,0);
1551 }
1552 if (events & MID_TX_DMA_COMPLETE) {
1553 EVENT("INT: TX DMA COMPLETE\n",0,0);
1554 dequeue_tx(dev);
1555 }
1556 if (events & MID_TX_COMPLETE) {
1557 EVENT("INT: TX COMPLETE\n",0,0);
1558 tx_complete++;
1559 wake_up(&eni_dev->tx_wait);
1560 /* poll_rx ? */
1561 }
1562 if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) {
1563 EVENT("bug interrupt\n",0,0);
1564 bug_int(dev,events);
1565 }
1566 poll_tx(dev);
1567 }
1568
1569
1570 /*--------------------------------- entries ---------------------------------*/
1571
1572
1573 static const char *media_name[] __devinitdata = {
1574 "MMF", "SMF", "MMF", "03?", /* 0- 3 */
1575 "UTP", "05?", "06?", "07?", /* 4- 7 */
1576 "TAXI","09?", "10?", "11?", /* 8-11 */
1577 "12?", "13?", "14?", "15?", /* 12-15 */
1578 "MMF", "SMF", "18?", "19?", /* 16-19 */
1579 "UTP", "21?", "22?", "23?", /* 20-23 */
1580 "24?", "25?", "26?", "27?", /* 24-27 */
1581 "28?", "29?", "30?", "31?" /* 28-31 */
1582 };
1583
1584
1585 #define SET_SEPROM \
1586 ({ if (!error && !pci_error) { \
1587 pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \
1588 udelay(10); /* 10 usecs */ \
1589 } })
1590 #define GET_SEPROM \
1591 ({ if (!error && !pci_error) { \
1592 pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \
1593 udelay(10); /* 10 usecs */ \
1594 } })
1595
1596
1597 static int __devinit get_esi_asic(struct atm_dev *dev)
1598 {
1599 struct eni_dev *eni_dev;
1600 unsigned char tonga;
1601 int error,failed,pci_error;
1602 int address,i,j;
1603
1604 eni_dev = ENI_DEV(dev);
1605 error = pci_error = 0;
1606 tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK;
1607 SET_SEPROM;
1608 for (i = 0; i < ESI_LEN && !error && !pci_error; i++) {
1609 /* start operation */
1610 tonga |= SEPROM_DATA;
1611 SET_SEPROM;
1612 tonga |= SEPROM_CLK;
1613 SET_SEPROM;
1614 tonga &= ~SEPROM_DATA;
1615 SET_SEPROM;
1616 tonga &= ~SEPROM_CLK;
1617 SET_SEPROM;
1618 /* send address */
1619 address = ((i+SEPROM_ESI_BASE) << 1)+1;
1620 for (j = 7; j >= 0; j--) {
1621 tonga = (address >> j) & 1 ? tonga | SEPROM_DATA :
1622 tonga & ~SEPROM_DATA;
1623 SET_SEPROM;
1624 tonga |= SEPROM_CLK;
1625 SET_SEPROM;
1626 tonga &= ~SEPROM_CLK;
1627 SET_SEPROM;
1628 }
1629 /* get ack */
1630 tonga |= SEPROM_DATA;
1631 SET_SEPROM;
1632 tonga |= SEPROM_CLK;
1633 SET_SEPROM;
1634 GET_SEPROM;
1635 failed = tonga & SEPROM_DATA;
1636 tonga &= ~SEPROM_CLK;
1637 SET_SEPROM;
1638 tonga |= SEPROM_DATA;
1639 SET_SEPROM;
1640 if (failed) error = -EIO;
1641 else {
1642 dev->esi[i] = 0;
1643 for (j = 7; j >= 0; j--) {
1644 dev->esi[i] <<= 1;
1645 tonga |= SEPROM_DATA;
1646 SET_SEPROM;
1647 tonga |= SEPROM_CLK;
1648 SET_SEPROM;
1649 GET_SEPROM;
1650 if (tonga & SEPROM_DATA) dev->esi[i] |= 1;
1651 tonga &= ~SEPROM_CLK;
1652 SET_SEPROM;
1653 tonga |= SEPROM_DATA;
1654 SET_SEPROM;
1655 }
1656 /* get ack */
1657 tonga |= SEPROM_DATA;
1658 SET_SEPROM;
1659 tonga |= SEPROM_CLK;
1660 SET_SEPROM;
1661 GET_SEPROM;
1662 if (!(tonga & SEPROM_DATA)) error = -EIO;
1663 tonga &= ~SEPROM_CLK;
1664 SET_SEPROM;
1665 tonga |= SEPROM_DATA;
1666 SET_SEPROM;
1667 }
1668 /* stop operation */
1669 tonga &= ~SEPROM_DATA;
1670 SET_SEPROM;
1671 tonga |= SEPROM_CLK;
1672 SET_SEPROM;
1673 tonga |= SEPROM_DATA;
1674 SET_SEPROM;
1675 }
1676 if (pci_error) {
1677 printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI "
1678 "(0x%02x)\n",dev->number,pci_error);
1679 error = -EIO;
1680 }
1681 return error;
1682 }
1683
1684
1685 #undef SET_SEPROM
1686 #undef GET_SEPROM
1687
1688
1689 static int __devinit get_esi_fpga(struct atm_dev *dev, void __iomem *base)
1690 {
1691 void __iomem *mac_base;
1692 int i;
1693
1694 mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom);
1695 for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3));
1696 return 0;
1697 }
1698
1699
1700 static int __devinit eni_do_init(struct atm_dev *dev)
1701 {
1702 struct midway_eprom __iomem *eprom;
1703 struct eni_dev *eni_dev;
1704 struct pci_dev *pci_dev;
1705 unsigned long real_base;
1706 void __iomem *base;
1707 int error,i,last;
1708
1709 DPRINTK(">eni_init\n");
1710 dev->ci_range.vpi_bits = 0;
1711 dev->ci_range.vci_bits = NR_VCI_LD;
1712 dev->link_rate = ATM_OC3_PCR;
1713 eni_dev = ENI_DEV(dev);
1714 pci_dev = eni_dev->pci_dev;
1715 real_base = pci_resource_start(pci_dev, 0);
1716 eni_dev->irq = pci_dev->irq;
1717 if ((error = pci_write_config_word(pci_dev,PCI_COMMAND,
1718 PCI_COMMAND_MEMORY |
1719 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1720 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory "
1721 "(0x%02x)\n",dev->number,error);
1722 return -EIO;
1723 }
1724 printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,",
1725 dev->number,pci_dev->revision,real_base,eni_dev->irq);
1726 if (!(base = ioremap_nocache(real_base,MAP_MAX_SIZE))) {
1727 printk("\n");
1728 printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page "
1729 "mapping\n",dev->number);
1730 return error;
1731 }
1732 eni_dev->base_diff = real_base - (unsigned long) base;
1733 /* id may not be present in ASIC Tonga boards - check this @@@ */
1734 if (!eni_dev->asic) {
1735 eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom));
1736 if (readl(&eprom->magic) != ENI155_MAGIC) {
1737 printk("\n");
1738 printk(KERN_ERR KERN_ERR DEV_LABEL "(itf %d): bad "
1739 "magic - expected 0x%x, got 0x%x\n",dev->number,
1740 ENI155_MAGIC,(unsigned) readl(&eprom->magic));
1741 error = -EINVAL;
1742 goto unmap;
1743 }
1744 }
1745 eni_dev->phy = base+PHY_BASE;
1746 eni_dev->reg = base+REG_BASE;
1747 eni_dev->ram = base+RAM_BASE;
1748 last = MAP_MAX_SIZE-RAM_BASE;
1749 for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) {
1750 writel(0x55555555,eni_dev->ram+i);
1751 if (readl(eni_dev->ram+i) != 0x55555555) last = i;
1752 else {
1753 writel(0xAAAAAAAA,eni_dev->ram+i);
1754 if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i;
1755 else writel(i,eni_dev->ram+i);
1756 }
1757 }
1758 for (i = 0; i < last; i += RAM_INCREMENT)
1759 if (readl(eni_dev->ram+i) != i) break;
1760 eni_dev->mem = i;
1761 memset_io(eni_dev->ram,0,eni_dev->mem);
1762 /* TODO: should shrink allocation now */
1763 printk("mem=%dkB (",eni_dev->mem >> 10);
1764 /* TODO: check for non-SUNI, check for TAXI ? */
1765 if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) {
1766 printk(")\n");
1767 printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n",
1768 dev->number,(unsigned) eni_in(MID_RES_ID_MCON));
1769 error = -EINVAL;
1770 goto unmap;
1771 }
1772 error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base);
1773 if (error)
1774 goto unmap;
1775 for (i = 0; i < ESI_LEN; i++)
1776 printk("%s%02X",i ? "-" : "",dev->esi[i]);
1777 printk(")\n");
1778 printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number,
1779 eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA",
1780 media_name[eni_in(MID_RES_ID_MCON) & DAUGTHER_ID]);
1781
1782 error = suni_init(dev);
1783 if (error)
1784 goto unmap;
1785 out:
1786 return error;
1787 unmap:
1788 iounmap(base);
1789 goto out;
1790 }
1791
1792
1793 static int __devinit eni_start(struct atm_dev *dev)
1794 {
1795 struct eni_dev *eni_dev;
1796
1797 void __iomem *buf;
1798 unsigned long buffer_mem;
1799 int error;
1800
1801 DPRINTK(">eni_start\n");
1802 eni_dev = ENI_DEV(dev);
1803 if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) {
1804 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
1805 dev->number,eni_dev->irq);
1806 error = -EAGAIN;
1807 goto out;
1808 }
1809 pci_set_master(eni_dev->pci_dev);
1810 if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND,
1811 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
1812 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1813 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+"
1814 "master (0x%02x)\n",dev->number,error);
1815 goto free_irq;
1816 }
1817 if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,
1818 END_SWAP_DMA))) {
1819 printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap "
1820 "(0x%02x)\n",dev->number,error);
1821 goto free_irq;
1822 }
1823 /* determine addresses of internal tables */
1824 eni_dev->vci = eni_dev->ram;
1825 eni_dev->rx_dma = eni_dev->ram+NR_VCI*16;
1826 eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8;
1827 eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8;
1828 buf = eni_dev->service+NR_SERVICE*4;
1829 DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n",
1830 eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma,
1831 eni_dev->service,buf);
1832 spin_lock_init(&eni_dev->lock);
1833 tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev);
1834 eni_dev->events = 0;
1835 /* initialize memory management */
1836 buffer_mem = eni_dev->mem - (buf - eni_dev->ram);
1837 eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2;
1838 eni_dev->free_list = kmalloc(
1839 sizeof(struct eni_free)*(eni_dev->free_list_size+1),GFP_KERNEL);
1840 if (!eni_dev->free_list) {
1841 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
1842 dev->number);
1843 error = -ENOMEM;
1844 goto free_irq;
1845 }
1846 eni_dev->free_len = 0;
1847 eni_put_free(eni_dev,buf,buffer_mem);
1848 memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */
1849 /*
1850 * byte_addr free (k)
1851 * 0x00000000 512 VCI table
1852 * 0x00004000 496 RX DMA
1853 * 0x00005000 492 TX DMA
1854 * 0x00006000 488 service list
1855 * 0x00007000 484 buffers
1856 * 0x00080000 0 end (512kB)
1857 */
1858 eni_out(0xffffffff,MID_IE);
1859 error = start_tx(dev);
1860 if (error) goto free_list;
1861 error = start_rx(dev);
1862 if (error) goto free_list;
1863 error = dev->phy->start(dev);
1864 if (error) goto free_list;
1865 eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) |
1866 MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE,
1867 MID_MC_S);
1868 /* Tonga uses SBus INTReq1 */
1869 (void) eni_in(MID_ISA); /* clear Midway interrupts */
1870 return 0;
1871
1872 free_list:
1873 kfree(eni_dev->free_list);
1874
1875 free_irq:
1876 free_irq(eni_dev->irq, eni_dev);
1877
1878 out:
1879 return error;
1880 }
1881
1882
1883 static void eni_close(struct atm_vcc *vcc)
1884 {
1885 DPRINTK(">eni_close\n");
1886 if (!ENI_VCC(vcc)) return;
1887 clear_bit(ATM_VF_READY,&vcc->flags);
1888 close_rx(vcc);
1889 close_tx(vcc);
1890 DPRINTK("eni_close: done waiting\n");
1891 /* deallocate memory */
1892 kfree(ENI_VCC(vcc));
1893 vcc->dev_data = NULL;
1894 clear_bit(ATM_VF_ADDR,&vcc->flags);
1895 /*foo();*/
1896 }
1897
1898
1899 static int eni_open(struct atm_vcc *vcc)
1900 {
1901 struct eni_dev *eni_dev;
1902 struct eni_vcc *eni_vcc;
1903 int error;
1904 short vpi = vcc->vpi;
1905 int vci = vcc->vci;
1906
1907 DPRINTK(">eni_open\n");
1908 EVENT("eni_open\n",0,0);
1909 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1910 vcc->dev_data = NULL;
1911 eni_dev = ENI_DEV(vcc->dev);
1912 if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
1913 set_bit(ATM_VF_ADDR,&vcc->flags);
1914 if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5)
1915 return -EINVAL;
1916 DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi,
1917 vcc->vci);
1918 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
1919 eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL);
1920 if (!eni_vcc) return -ENOMEM;
1921 vcc->dev_data = eni_vcc;
1922 eni_vcc->tx = NULL; /* for eni_close after open_rx */
1923 if ((error = open_rx_first(vcc))) {
1924 eni_close(vcc);
1925 return error;
1926 }
1927 if ((error = open_tx_first(vcc))) {
1928 eni_close(vcc);
1929 return error;
1930 }
1931 }
1932 if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0;
1933 if ((error = open_rx_second(vcc))) {
1934 eni_close(vcc);
1935 return error;
1936 }
1937 if ((error = open_tx_second(vcc))) {
1938 eni_close(vcc);
1939 return error;
1940 }
1941 set_bit(ATM_VF_READY,&vcc->flags);
1942 /* should power down SUNI while !ref_count @@@ */
1943 return 0;
1944 }
1945
1946
1947 static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs)
1948 {
1949 struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1950 struct eni_tx *tx = ENI_VCC(vcc)->tx;
1951 struct sk_buff *skb;
1952 int error,rate,rsv,shp;
1953
1954 if (qos->txtp.traffic_class == ATM_NONE) return 0;
1955 if (tx == eni_dev->ubr) return -EBADFD;
1956 rate = atm_pcr_goal(&qos->txtp);
1957 if (rate < 0) rate = -rate;
1958 rsv = shp = 0;
1959 if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1;
1960 if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1;
1961 if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1;
1962 if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1;
1963 if (!rsv && !shp) return 0;
1964 error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp);
1965 if (error) return error;
1966 if (shp && !(flgs & ATM_MF_IMMED)) return 0;
1967 /*
1968 * Walk through the send buffer and patch the rate information in all
1969 * segmentation buffer descriptors of this VCC.
1970 */
1971 tasklet_disable(&eni_dev->task);
1972 skb_queue_walk(&eni_dev->tx_queue, skb) {
1973 void __iomem *dsc;
1974
1975 if (ATM_SKB(skb)->vcc != vcc) continue;
1976 dsc = tx->send+ENI_PRV_POS(skb)*4;
1977 writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) |
1978 (tx->prescaler << MID_SEG_PR_SHIFT) |
1979 (tx->resolution << MID_SEG_RATE_SHIFT), dsc);
1980 }
1981 tasklet_enable(&eni_dev->task);
1982 return 0;
1983 }
1984
1985
1986 static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
1987 {
1988 struct eni_dev *eni_dev = ENI_DEV(dev);
1989
1990 if (cmd == ENI_MEMDUMP) {
1991 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1992 printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d "
1993 "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number);
1994 dump(dev);
1995 return 0;
1996 }
1997 if (cmd == ENI_SETMULT) {
1998 struct eni_multipliers mult;
1999
2000 if (!capable(CAP_NET_ADMIN)) return -EPERM;
2001 if (copy_from_user(&mult, arg,
2002 sizeof(struct eni_multipliers)))
2003 return -EFAULT;
2004 if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) ||
2005 mult.tx > 65536 || mult.rx > 65536)
2006 return -EINVAL;
2007 if (mult.tx) eni_dev->tx_mult = mult.tx;
2008 if (mult.rx) eni_dev->rx_mult = mult.rx;
2009 return 0;
2010 }
2011 if (cmd == ATM_SETCIRANGE) {
2012 struct atm_cirange ci;
2013
2014 if (copy_from_user(&ci, arg,sizeof(struct atm_cirange)))
2015 return -EFAULT;
2016 if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) &&
2017 (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX))
2018 return 0;
2019 return -EINVAL;
2020 }
2021 if (!dev->phy->ioctl) return -ENOIOCTLCMD;
2022 return dev->phy->ioctl(dev,cmd,arg);
2023 }
2024
2025
2026 static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname,
2027 void __user *optval,int optlen)
2028 {
2029 return -EINVAL;
2030 }
2031
2032
2033 static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname,
2034 void __user *optval,int optlen)
2035 {
2036 return -EINVAL;
2037 }
2038
2039
2040 static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb)
2041 {
2042 enum enq_res res;
2043
2044 DPRINTK(">eni_send\n");
2045 if (!ENI_VCC(vcc)->tx) {
2046 if (vcc->pop) vcc->pop(vcc,skb);
2047 else dev_kfree_skb(skb);
2048 return -EINVAL;
2049 }
2050 if (!skb) {
2051 printk(KERN_CRIT "!skb in eni_send ?\n");
2052 if (vcc->pop) vcc->pop(vcc,skb);
2053 return -EINVAL;
2054 }
2055 if (vcc->qos.aal == ATM_AAL0) {
2056 if (skb->len != ATM_CELL_SIZE-1) {
2057 if (vcc->pop) vcc->pop(vcc,skb);
2058 else dev_kfree_skb(skb);
2059 return -EINVAL;
2060 }
2061 *(u32 *) skb->data = htonl(*(u32 *) skb->data);
2062 }
2063 submitted++;
2064 ATM_SKB(skb)->vcc = vcc;
2065 tasklet_disable(&ENI_DEV(vcc->dev)->task);
2066 res = do_tx(skb);
2067 tasklet_enable(&ENI_DEV(vcc->dev)->task);
2068 if (res == enq_ok) return 0;
2069 skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb);
2070 backlogged++;
2071 tasklet_schedule(&ENI_DEV(vcc->dev)->task);
2072 return 0;
2073 }
2074
2075 static void eni_phy_put(struct atm_dev *dev,unsigned char value,
2076 unsigned long addr)
2077 {
2078 writel(value,ENI_DEV(dev)->phy+addr*4);
2079 }
2080
2081
2082
2083 static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr)
2084 {
2085 return readl(ENI_DEV(dev)->phy+addr*4);
2086 }
2087
2088
2089 static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page)
2090 {
2091 struct hlist_node *node;
2092 struct sock *s;
2093 static const char *signal[] = { "LOST","unknown","okay" };
2094 struct eni_dev *eni_dev = ENI_DEV(dev);
2095 struct atm_vcc *vcc;
2096 int left,i;
2097
2098 left = *pos;
2099 if (!left)
2100 return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, "
2101 "%d cps remaining\n",dev->number,signal[(int) dev->signal],
2102 eni_dev->mem >> 10,eni_dev->tx_bw);
2103 if (!--left)
2104 return sprintf(page,"%4sBursts: TX"
2105 #if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \
2106 !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \
2107 !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \
2108 !defined(CONFIG_ATM_ENI_BURST_TX_2W)
2109 " none"
2110 #endif
2111 #ifdef CONFIG_ATM_ENI_BURST_TX_16W
2112 " 16W"
2113 #endif
2114 #ifdef CONFIG_ATM_ENI_BURST_TX_8W
2115 " 8W"
2116 #endif
2117 #ifdef CONFIG_ATM_ENI_BURST_TX_4W
2118 " 4W"
2119 #endif
2120 #ifdef CONFIG_ATM_ENI_BURST_TX_2W
2121 " 2W"
2122 #endif
2123 ", RX"
2124 #if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \
2125 !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \
2126 !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \
2127 !defined(CONFIG_ATM_ENI_BURST_RX_2W)
2128 " none"
2129 #endif
2130 #ifdef CONFIG_ATM_ENI_BURST_RX_16W
2131 " 16W"
2132 #endif
2133 #ifdef CONFIG_ATM_ENI_BURST_RX_8W
2134 " 8W"
2135 #endif
2136 #ifdef CONFIG_ATM_ENI_BURST_RX_4W
2137 " 4W"
2138 #endif
2139 #ifdef CONFIG_ATM_ENI_BURST_RX_2W
2140 " 2W"
2141 #endif
2142 #ifndef CONFIG_ATM_ENI_TUNE_BURST
2143 " (default)"
2144 #endif
2145 "\n","");
2146 if (!--left)
2147 return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n",
2148 "",eni_dev->tx_mult,eni_dev->rx_mult);
2149 for (i = 0; i < NR_CHAN; i++) {
2150 struct eni_tx *tx = eni_dev->tx+i;
2151
2152 if (!tx->send) continue;
2153 if (!--left) {
2154 return sprintf(page,"tx[%d]: 0x%ld-0x%ld "
2155 "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i,
2156 (unsigned long) (tx->send - eni_dev->ram),
2157 tx->send-eni_dev->ram+tx->words*4-1,tx->words*4,
2158 tx->reserved,tx->shaping,
2159 tx == eni_dev->ubr ? " (UBR)" : "");
2160 }
2161 if (--left) continue;
2162 return sprintf(page,"%10sbacklog %u packets\n","",
2163 skb_queue_len(&tx->backlog));
2164 }
2165 read_lock(&vcc_sklist_lock);
2166 for(i = 0; i < VCC_HTABLE_SIZE; ++i) {
2167 struct hlist_head *head = &vcc_hash[i];
2168
2169 sk_for_each(s, node, head) {
2170 struct eni_vcc *eni_vcc;
2171 int length;
2172
2173 vcc = atm_sk(s);
2174 if (vcc->dev != dev)
2175 continue;
2176 eni_vcc = ENI_VCC(vcc);
2177 if (--left) continue;
2178 length = sprintf(page,"vcc %4d: ",vcc->vci);
2179 if (eni_vcc->rx) {
2180 length += sprintf(page+length,"0x%ld-0x%ld "
2181 "(%6ld bytes)",
2182 (unsigned long) (eni_vcc->recv - eni_dev->ram),
2183 eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1,
2184 eni_vcc->words*4);
2185 if (eni_vcc->tx) length += sprintf(page+length,", ");
2186 }
2187 if (eni_vcc->tx)
2188 length += sprintf(page+length,"tx[%d], txing %d bytes",
2189 eni_vcc->tx->index,eni_vcc->txing);
2190 page[length] = '\n';
2191 read_unlock(&vcc_sklist_lock);
2192 return length+1;
2193 }
2194 }
2195 read_unlock(&vcc_sklist_lock);
2196 for (i = 0; i < eni_dev->free_len; i++) {
2197 struct eni_free *fe = eni_dev->free_list+i;
2198 unsigned long offset;
2199
2200 if (--left) continue;
2201 offset = (unsigned long) eni_dev->ram+eni_dev->base_diff;
2202 return sprintf(page,"free %p-%p (%6d bytes)\n",
2203 fe->start-offset,fe->start-offset+(1 << fe->order)-1,
2204 1 << fe->order);
2205 }
2206 return 0;
2207 }
2208
2209
2210 static const struct atmdev_ops ops = {
2211 .open = eni_open,
2212 .close = eni_close,
2213 .ioctl = eni_ioctl,
2214 .getsockopt = eni_getsockopt,
2215 .setsockopt = eni_setsockopt,
2216 .send = eni_send,
2217 .phy_put = eni_phy_put,
2218 .phy_get = eni_phy_get,
2219 .change_qos = eni_change_qos,
2220 .proc_read = eni_proc_read
2221 };
2222
2223
2224 static int __devinit eni_init_one(struct pci_dev *pci_dev,
2225 const struct pci_device_id *ent)
2226 {
2227 struct atm_dev *dev;
2228 struct eni_dev *eni_dev;
2229 int error = -ENOMEM;
2230
2231 DPRINTK("eni_init_one\n");
2232
2233 if (pci_enable_device(pci_dev)) {
2234 error = -EIO;
2235 goto out0;
2236 }
2237
2238 eni_dev = kmalloc(sizeof(struct eni_dev),GFP_KERNEL);
2239 if (!eni_dev) goto out0;
2240 if (!cpu_zeroes) {
2241 cpu_zeroes = pci_alloc_consistent(pci_dev,ENI_ZEROES_SIZE,
2242 &zeroes);
2243 if (!cpu_zeroes) goto out1;
2244 }
2245 dev = atm_dev_register(DEV_LABEL,&ops,-1,NULL);
2246 if (!dev) goto out2;
2247 pci_set_drvdata(pci_dev, dev);
2248 eni_dev->pci_dev = pci_dev;
2249 dev->dev_data = eni_dev;
2250 eni_dev->asic = ent->driver_data;
2251 error = eni_do_init(dev);
2252 if (error) goto out3;
2253 error = eni_start(dev);
2254 if (error) goto out3;
2255 eni_dev->more = eni_boards;
2256 eni_boards = dev;
2257 return 0;
2258 out3:
2259 atm_dev_deregister(dev);
2260 out2:
2261 pci_free_consistent(eni_dev->pci_dev,ENI_ZEROES_SIZE,cpu_zeroes,zeroes);
2262 cpu_zeroes = NULL;
2263 out1:
2264 kfree(eni_dev);
2265 out0:
2266 return error;
2267 }
2268
2269
2270 static struct pci_device_id eni_pci_tbl[] = {
2271 { PCI_VENDOR_ID_EF, PCI_DEVICE_ID_EF_ATM_FPGA, PCI_ANY_ID, PCI_ANY_ID,
2272 0, 0, 0 /* FPGA */ },
2273 { PCI_VENDOR_ID_EF, PCI_DEVICE_ID_EF_ATM_ASIC, PCI_ANY_ID, PCI_ANY_ID,
2274 0, 0, 1 /* ASIC */ },
2275 { 0, }
2276 };
2277 MODULE_DEVICE_TABLE(pci,eni_pci_tbl);
2278
2279
2280 static void __devexit eni_remove_one(struct pci_dev *pci_dev)
2281 {
2282 /* grrr */
2283 }
2284
2285
2286 static struct pci_driver eni_driver = {
2287 .name = DEV_LABEL,
2288 .id_table = eni_pci_tbl,
2289 .probe = eni_init_one,
2290 .remove = __devexit_p(eni_remove_one),
2291 };
2292
2293
2294 static int __init eni_init(void)
2295 {
2296 struct sk_buff *skb; /* dummy for sizeof */
2297
2298 if (sizeof(skb->cb) < sizeof(struct eni_skb_prv)) {
2299 printk(KERN_ERR "eni_detect: skb->cb is too small (%Zd < %Zd)\n",
2300 sizeof(skb->cb),sizeof(struct eni_skb_prv));
2301 return -EIO;
2302 }
2303 return pci_register_driver(&eni_driver);
2304 }
2305
2306
2307 module_init(eni_init);
2308 /* @@@ since exit routine not defined, this module can not be unloaded */
2309
2310 MODULE_LICENSE("GPL");
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