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inet: make sure to grab rcu_read_lock before using ireq->ireq_opt
[linux/fpc-iii.git] / drivers / atm / eni.c
blob40c2d561417bdecd6bd386f3c92214a51a6faece
1 /* drivers/atm/eni.c - Efficient Networks ENI155P device driver */
2
3 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
4
5
6 #include <linux/module.h>
7 #include <linux/kernel.h>
8 #include <linux/mm.h>
9 #include <linux/pci.h>
10 #include <linux/errno.h>
11 #include <linux/atm.h>
12 #include <linux/atmdev.h>
13 #include <linux/sonet.h>
14 #include <linux/skbuff.h>
15 #include <linux/time.h>
16 #include <linux/delay.h>
17 #include <linux/uio.h>
18 #include <linux/init.h>
19 #include <linux/atm_eni.h>
20 #include <linux/bitops.h>
21 #include <linux/slab.h>
22 #include <asm/io.h>
23 #include <linux/atomic.h>
24 #include <asm/uaccess.h>
25 #include <asm/string.h>
26 #include <asm/byteorder.h>
27
28 #include "tonga.h"
29 #include "midway.h"
30 #include "suni.h"
31 #include "eni.h"
32
33 #if !defined(__i386__) && !defined(__x86_64__)
34 #ifndef ioremap_nocache
35 #define ioremap_nocache(X,Y) ioremap(X,Y)
36 #endif
37 #endif
38
39 /*
40 * TODO:
41 *
42 * Show stoppers
43 * none
44 *
45 * Minor
46 * - OAM support
47 * - fix bugs listed below
48 */
49
50 /*
51 * KNOWN BUGS:
52 *
53 * - may run into JK-JK bug and deadlock
54 * - should allocate UBR channel first
55 * - buffer space allocation algorithm is stupid
56 * (RX: should be maxSDU+maxdelay*rate
57 * TX: should be maxSDU+min(maxSDU,maxdelay*rate) )
58 * - doesn't support OAM cells
59 * - eni_put_free may hang if not putting memory fragments that _complete_
60 * 2^n block (never happens in real life, though)
61 */
62
63
64 #if 0
65 #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
66 #else
67 #define DPRINTK(format,args...)
68 #endif
69
70
71 #ifndef CONFIG_ATM_ENI_TUNE_BURST
72 #define CONFIG_ATM_ENI_BURST_TX_8W
73 #define CONFIG_ATM_ENI_BURST_RX_4W
74 #endif
75
76
77 #ifndef CONFIG_ATM_ENI_DEBUG
78
79
80 #define NULLCHECK(x)
81
82 #define EVENT(s,a,b)
83
84
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 /* Read/write registers on card */
159 #define eni_in(r) readl(eni_dev->reg+(r)*4)
160 #define eni_out(v,r) writel((v),eni_dev->reg+(r)*4)
161
162
163 /*-------------------------------- utilities --------------------------------*/
164
165
166 static void dump_mem(struct eni_dev *eni_dev)
167 {
168 int i;
169
170 for (i = 0; i < eni_dev->free_len; i++)
171 printk(KERN_DEBUG " %d: %p %d\n",i,
172 eni_dev->free_list[i].start,
173 1 << eni_dev->free_list[i].order);
174 }
175
176
177 static void dump(struct atm_dev *dev)
178 {
179 struct eni_dev *eni_dev;
180
181 int i;
182
183 eni_dev = ENI_DEV(dev);
184 printk(KERN_NOTICE "Free memory\n");
185 dump_mem(eni_dev);
186 printk(KERN_NOTICE "TX buffers\n");
187 for (i = 0; i < NR_CHAN; i++)
188 if (eni_dev->tx[i].send)
189 printk(KERN_NOTICE " TX %d @ %p: %ld\n",i,
190 eni_dev->tx[i].send,eni_dev->tx[i].words*4);
191 printk(KERN_NOTICE "RX buffers\n");
192 for (i = 0; i < 1024; i++)
193 if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx)
194 printk(KERN_NOTICE " RX %d @ %p: %ld\n",i,
195 ENI_VCC(eni_dev->rx_map[i])->recv,
196 ENI_VCC(eni_dev->rx_map[i])->words*4);
197 printk(KERN_NOTICE "----\n");
198 }
199
200
201 static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start,
202 unsigned long size)
203 {
204 struct eni_free *list;
205 int len,order;
206
207 DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size);
208 start += eni_dev->base_diff;
209 list = eni_dev->free_list;
210 len = eni_dev->free_len;
211 while (size) {
212 if (len >= eni_dev->free_list_size) {
213 printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n",
214 start,size);
215 break;
216 }
217 for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++);
218 if (MID_MIN_BUF_SIZE > (1 << order)) {
219 printk(KERN_CRIT "eni_put_free: order %d too small\n",
220 order);
221 break;
222 }
223 list[len].start = (void __iomem *) start;
224 list[len].order = order;
225 len++;
226 start += 1 << order;
227 size -= 1 << order;
228 }
229 eni_dev->free_len = len;
230 /*dump_mem(eni_dev);*/
231 }
232
233
234 static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size)
235 {
236 struct eni_free *list;
237 void __iomem *start;
238 int len,i,order,best_order,index;
239
240 list = eni_dev->free_list;
241 len = eni_dev->free_len;
242 if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE;
243 if (*size > MID_MAX_BUF_SIZE) return NULL;
244 for (order = 0; (1 << order) < *size; order++);
245 DPRINTK("trying: %ld->%d\n",*size,order);
246 best_order = 65; /* we don't have more than 2^64 of anything ... */
247 index = 0; /* silence GCC */
248 for (i = 0; i < len; i++)
249 if (list[i].order == order) {
250 best_order = order;
251 index = i;
252 break;
253 }
254 else if (best_order > list[i].order && list[i].order > order) {
255 best_order = list[i].order;
256 index = i;
257 }
258 if (best_order == 65) return NULL;
259 start = list[index].start-eni_dev->base_diff;
260 list[index] = list[--len];
261 eni_dev->free_len = len;
262 *size = 1 << order;
263 eni_put_free(eni_dev,start+*size,(1 << best_order)-*size);
264 DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start);
265 memset_io(start,0,*size); /* never leak data */
266 /*dump_mem(eni_dev);*/
267 return start;
268 }
269
270
271 static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start,
272 unsigned long size)
273 {
274 struct eni_free *list;
275 int len,i,order;
276
277 start += eni_dev->base_diff;
278 list = eni_dev->free_list;
279 len = eni_dev->free_len;
280 for (order = -1; size; order++) size >>= 1;
281 DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order);
282 for (i = 0; i < len; i++)
283 if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) &&
284 list[i].order == order) {
285 DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i,
286 list[i].start,start,1 << order,list[i].order,order);
287 list[i] = list[--len];
288 start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order));
289 order++;
290 i = -1;
291 continue;
292 }
293 if (len >= eni_dev->free_list_size) {
294 printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start,
295 order);
296 return;
297 }
298 list[len].start = start;
299 list[len].order = order;
300 eni_dev->free_len = len+1;
301 /*dump_mem(eni_dev);*/
302 }
303
304
305 /*----------------------------------- RX ------------------------------------*/
306
307
308 #define ENI_VCC_NOS ((struct atm_vcc *) 1)
309
310
311 static void rx_ident_err(struct atm_vcc *vcc)
312 {
313 struct atm_dev *dev;
314 struct eni_dev *eni_dev;
315 struct eni_vcc *eni_vcc;
316
317 dev = vcc->dev;
318 eni_dev = ENI_DEV(dev);
319 /* immediately halt adapter */
320 eni_out(eni_in(MID_MC_S) &
321 ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S);
322 /* dump useful information */
323 eni_vcc = ENI_VCC(vcc);
324 printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident "
325 "mismatch\n",dev->number);
326 printk(KERN_ALERT " VCI %d, rxing %d, words %ld\n",vcc->vci,
327 eni_vcc->rxing,eni_vcc->words);
328 printk(KERN_ALERT " host descr 0x%lx, rx pos 0x%lx, descr value "
329 "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos,
330 (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4));
331 printk(KERN_ALERT " last %p, servicing %d\n",eni_vcc->last,
332 eni_vcc->servicing);
333 EVENT("---dump ends here---\n",0,0);
334 printk(KERN_NOTICE "---recent events---\n");
335 event_dump();
336 ENI_DEV(dev)->fast = NULL; /* really stop it */
337 ENI_DEV(dev)->slow = NULL;
338 skb_queue_head_init(&ENI_DEV(dev)->rx_queue);
339 }
340
341
342 static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb,
343 unsigned long skip,unsigned long size,unsigned long eff)
344 {
345 struct eni_dev *eni_dev;
346 struct eni_vcc *eni_vcc;
347 u32 dma_rd,dma_wr;
348 u32 dma[RX_DMA_BUF*2];
349 dma_addr_t paddr;
350 unsigned long here;
351 int i,j;
352
353 eni_dev = ENI_DEV(vcc->dev);
354 eni_vcc = ENI_VCC(vcc);
355 paddr = 0; /* GCC, shut up */
356 if (skb) {
357 paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len,
358 DMA_FROM_DEVICE);
359 if (dma_mapping_error(&eni_dev->pci_dev->dev, paddr))
360 goto dma_map_error;
361 ENI_PRV_PADDR(skb) = paddr;
362 if (paddr & 3)
363 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has "
364 "mis-aligned RX data (0x%lx)\n",vcc->dev->number,
365 vcc->vci,(unsigned long) paddr);
366 ENI_PRV_SIZE(skb) = size+skip;
367 /* PDU plus descriptor */
368 ATM_SKB(skb)->vcc = vcc;
369 }
370 j = 0;
371 if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */
372 here = (eni_vcc->descr+skip) & (eni_vcc->words-1);
373 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci
374 << MID_DMA_VCI_SHIFT) | MID_DT_JK;
375 j++;
376 }
377 here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1);
378 if (!eff) size += skip;
379 else {
380 unsigned long words;
381
382 if (!size) {
383 DPRINTK("strange things happen ...\n");
384 EVENT("strange things happen ... (skip=%ld,eff=%ld)\n",
385 size,eff);
386 }
387 words = eff;
388 if (paddr & 15) {
389 unsigned long init;
390
391 init = 4-((paddr & 15) >> 2);
392 if (init > words) init = words;
393 dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
394 (vcc->vci << MID_DMA_VCI_SHIFT);
395 dma[j++] = paddr;
396 paddr += init << 2;
397 words -= init;
398 }
399 #ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */
400 if (words & ~15) {
401 dma[j++] = MID_DT_16W | ((words >> 4) <<
402 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
403 MID_DMA_VCI_SHIFT);
404 dma[j++] = paddr;
405 paddr += (words & ~15) << 2;
406 words &= 15;
407 }
408 #endif
409 #ifdef CONFIG_ATM_ENI_BURST_RX_8W /* works only with *some* PCI chipsets ... */
410 if (words & ~7) {
411 dma[j++] = MID_DT_8W | ((words >> 3) <<
412 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
413 MID_DMA_VCI_SHIFT);
414 dma[j++] = paddr;
415 paddr += (words & ~7) << 2;
416 words &= 7;
417 }
418 #endif
419 #ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */
420 if (words & ~3) {
421 dma[j++] = MID_DT_4W | ((words >> 2) <<
422 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
423 MID_DMA_VCI_SHIFT);
424 dma[j++] = paddr;
425 paddr += (words & ~3) << 2;
426 words &= 3;
427 }
428 #endif
429 #ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */
430 if (words & ~1) {
431 dma[j++] = MID_DT_2W | ((words >> 1) <<
432 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
433 MID_DMA_VCI_SHIFT);
434 dma[j++] = paddr;
435 paddr += (words & ~1) << 2;
436 words &= 1;
437 }
438 #endif
439 if (words) {
440 dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT)
441 | (vcc->vci << MID_DMA_VCI_SHIFT);
442 dma[j++] = paddr;
443 }
444 }
445 if (size != eff) {
446 dma[j++] = (here << MID_DMA_COUNT_SHIFT) |
447 (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK;
448 j++;
449 }
450 if (!j || j > 2*RX_DMA_BUF) {
451 printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n");
452 goto trouble;
453 }
454 dma[j-2] |= MID_DMA_END;
455 j = j >> 1;
456 dma_wr = eni_in(MID_DMA_WR_RX);
457 dma_rd = eni_in(MID_DMA_RD_RX);
458 /*
459 * Can I move the dma_wr pointer by 2j+1 positions without overwriting
460 * data that hasn't been read (position of dma_rd) yet ?
461 */
462 if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */
463 printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n",
464 vcc->dev->number);
465 goto trouble;
466 }
467 for (i = 0; i < j; i++) {
468 writel(dma[i*2],eni_dev->rx_dma+dma_wr*8);
469 writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4);
470 dma_wr = (dma_wr+1) & (NR_DMA_RX-1);
471 }
472 if (skb) {
473 ENI_PRV_POS(skb) = eni_vcc->descr+size+1;
474 skb_queue_tail(&eni_dev->rx_queue,skb);
475 eni_vcc->last = skb;
476 rx_enqueued++;
477 }
478 eni_vcc->descr = here;
479 eni_out(dma_wr,MID_DMA_WR_RX);
480 return 0;
481
482 trouble:
483 if (paddr)
484 dma_unmap_single(&eni_dev->pci_dev->dev,paddr,skb->len,
485 DMA_FROM_DEVICE);
486 dma_map_error:
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 dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len,
762 DMA_TO_DEVICE);
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 = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len,
1116 DMA_TO_DEVICE);
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_headlen(skb));
1134 else
1135 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1136 skb_frag_page(&skb_shinfo(skb)->frags[i]) +
1137 skb_shinfo(skb)->frags[i].page_offset,
1138 skb_frag_size(&skb_shinfo(skb)->frags[i]));
1139 }
1140 if (skb->len & 3) {
1141 put_dma(tx->index, eni_dev->dma, &j, eni_dev->zero.dma,
1142 4 - (skb->len & 3));
1143 }
1144 /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */
1145 eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) <<
1146 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1147 MID_DMA_END | MID_DT_JK;
1148 j++;
1149 DPRINTK("DMA at end: %d\n",j);
1150 /* store frame */
1151 writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) |
1152 (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) |
1153 (tx->resolution << MID_SEG_RATE_SHIFT) |
1154 (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4);
1155 /*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/
1156 writel((vcc->vci << MID_SEG_VCI_SHIFT) |
1157 (aal5 ? 0 : (skb->data[3] & 0xf)) |
1158 (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0),
1159 tx->send+((tx->tx_pos+1) & (tx->words-1))*4);
1160 DPRINTK("size: %d, len:%d\n",size,skb->len);
1161 if (aal5)
1162 writel(skb->len,tx->send+
1163 ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4);
1164 j = j >> 1;
1165 for (i = 0; i < j; i++) {
1166 writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8);
1167 writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4);
1168 dma_wr = (dma_wr+1) & (NR_DMA_TX-1);
1169 }
1170 ENI_PRV_POS(skb) = tx->tx_pos;
1171 ENI_PRV_SIZE(skb) = size;
1172 ENI_VCC(vcc)->txing += size;
1173 tx->tx_pos = (tx->tx_pos+size) & (tx->words-1);
1174 DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos);
1175 eni_out(dma_wr,MID_DMA_WR_TX);
1176 skb_queue_tail(&eni_dev->tx_queue,skb);
1177 queued++;
1178 return enq_ok;
1179 }
1180
1181
1182 static void poll_tx(struct atm_dev *dev)
1183 {
1184 struct eni_tx *tx;
1185 struct sk_buff *skb;
1186 enum enq_res res;
1187 int i;
1188
1189 DPRINTK(">poll_tx\n");
1190 for (i = NR_CHAN-1; i >= 0; i--) {
1191 tx = &ENI_DEV(dev)->tx[i];
1192 if (tx->send)
1193 while ((skb = skb_dequeue(&tx->backlog))) {
1194 res = do_tx(skb);
1195 if (res == enq_ok) continue;
1196 DPRINTK("re-queuing TX PDU\n");
1197 skb_queue_head(&tx->backlog,skb);
1198 requeued++;
1199 if (res == enq_jam) return;
1200 break;
1201 }
1202 }
1203 }
1204
1205
1206 static void dequeue_tx(struct atm_dev *dev)
1207 {
1208 struct eni_dev *eni_dev;
1209 struct atm_vcc *vcc;
1210 struct sk_buff *skb;
1211 struct eni_tx *tx;
1212
1213 NULLCHECK(dev);
1214 eni_dev = ENI_DEV(dev);
1215 NULLCHECK(eni_dev);
1216 while ((skb = skb_dequeue(&eni_dev->tx_queue))) {
1217 vcc = ATM_SKB(skb)->vcc;
1218 NULLCHECK(vcc);
1219 tx = ENI_VCC(vcc)->tx;
1220 NULLCHECK(ENI_VCC(vcc)->tx);
1221 DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb),
1222 (unsigned) eni_in(MID_TX_DESCRSTART(tx->index)));
1223 if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) ==
1224 eni_in(MID_TX_DESCRSTART(tx->index))) {
1225 skb_queue_head(&eni_dev->tx_queue,skb);
1226 break;
1227 }
1228 ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb);
1229 dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len,
1230 DMA_TO_DEVICE);
1231 if (vcc->pop) vcc->pop(vcc,skb);
1232 else dev_kfree_skb_irq(skb);
1233 atomic_inc(&vcc->stats->tx);
1234 wake_up(&eni_dev->tx_wait);
1235 dma_complete++;
1236 }
1237 }
1238
1239
1240 static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr)
1241 {
1242 int i;
1243
1244 for (i = !ubr; i < NR_CHAN; i++)
1245 if (!eni_dev->tx[i].send) return eni_dev->tx+i;
1246 return NULL;
1247 }
1248
1249
1250 static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre,
1251 int *res,int unlimited)
1252 {
1253 static const int pre_div[] = { 4,16,128,2048 };
1254 /* 2^(((x+2)^2-(x+2))/2+1) */
1255
1256 if (unlimited) *pre = *res = 0;
1257 else {
1258 if (*pcr > 0) {
1259 int div;
1260
1261 for (*pre = 0; *pre < 3; (*pre)++)
1262 if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break;
1263 div = pre_div[*pre]**pcr;
1264 DPRINTK("min div %d\n",div);
1265 *res = TS_CLOCK/div-1;
1266 }
1267 else {
1268 int div;
1269
1270 if (!*pcr) *pcr = eni_dev->tx_bw+reserved;
1271 for (*pre = 3; *pre >= 0; (*pre)--)
1272 if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break;
1273 if (*pre < 3) (*pre)++; /* else fail later */
1274 div = pre_div[*pre]*-*pcr;
1275 DPRINTK("max div %d\n",div);
1276 *res = DIV_ROUND_UP(TS_CLOCK, div)-1;
1277 }
1278 if (*res < 0) *res = 0;
1279 if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE;
1280 }
1281 *pcr = TS_CLOCK/pre_div[*pre]/(*res+1);
1282 DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res);
1283 return 0;
1284 }
1285
1286
1287 static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp,
1288 int set_rsv,int set_shp)
1289 {
1290 struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1291 struct eni_vcc *eni_vcc = ENI_VCC(vcc);
1292 struct eni_tx *tx;
1293 unsigned long size;
1294 void __iomem *mem;
1295 int rate,ubr,unlimited,new_tx;
1296 int pre,res,order;
1297 int error;
1298
1299 rate = atm_pcr_goal(txtp);
1300 ubr = txtp->traffic_class == ATM_UBR;
1301 unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR ||
1302 rate >= ATM_OC3_PCR);
1303 if (!unlimited) {
1304 size = txtp->max_sdu*eni_dev->tx_mult/100;
1305 if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <=
1306 MID_MAX_BUF_SIZE)
1307 size = MID_MAX_BUF_SIZE;
1308 }
1309 else {
1310 if (eni_dev->ubr) {
1311 eni_vcc->tx = eni_dev->ubr;
1312 txtp->pcr = ATM_OC3_PCR;
1313 return 0;
1314 }
1315 size = UBR_BUFFER;
1316 }
1317 new_tx = !eni_vcc->tx;
1318 mem = NULL; /* for gcc */
1319 if (!new_tx) tx = eni_vcc->tx;
1320 else {
1321 mem = eni_alloc_mem(eni_dev,&size);
1322 if (!mem) return -ENOBUFS;
1323 tx = alloc_tx(eni_dev,unlimited);
1324 if (!tx) {
1325 eni_free_mem(eni_dev,mem,size);
1326 return -EBUSY;
1327 }
1328 DPRINTK("got chan %d\n",tx->index);
1329 tx->reserved = tx->shaping = 0;
1330 tx->send = mem;
1331 tx->words = size >> 2;
1332 skb_queue_head_init(&tx->backlog);
1333 for (order = 0; size > (1 << (order+10)); order++);
1334 eni_out((order << MID_SIZE_SHIFT) |
1335 ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)),
1336 MID_TX_PLACE(tx->index));
1337 tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) &
1338 MID_DESCR_START;
1339 }
1340 error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited);
1341 if (!error && txtp->min_pcr > rate) error = -EINVAL;
1342 if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR &&
1343 txtp->max_pcr < rate) error = -EINVAL;
1344 if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved)
1345 error = -EINVAL;
1346 if (!error && set_rsv && !set_shp && rate < tx->shaping)
1347 error = -EINVAL;
1348 if (!error && !set_rsv && rate > tx->reserved && !ubr)
1349 error = -EINVAL;
1350 if (error) {
1351 if (new_tx) {
1352 tx->send = NULL;
1353 eni_free_mem(eni_dev,mem,size);
1354 }
1355 return error;
1356 }
1357 txtp->pcr = rate;
1358 if (set_rsv && !ubr) {
1359 eni_dev->tx_bw += tx->reserved;
1360 tx->reserved = rate;
1361 eni_dev->tx_bw -= rate;
1362 }
1363 if (set_shp || (unlimited && new_tx)) {
1364 if (unlimited && new_tx) eni_dev->ubr = tx;
1365 tx->prescaler = pre;
1366 tx->resolution = res;
1367 tx->shaping = rate;
1368 }
1369 if (set_shp) eni_vcc->tx = tx;
1370 DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping);
1371 return 0;
1372 }
1373
1374
1375 static int open_tx_first(struct atm_vcc *vcc)
1376 {
1377 ENI_VCC(vcc)->tx = NULL;
1378 if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0;
1379 ENI_VCC(vcc)->txing = 0;
1380 return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1);
1381 }
1382
1383
1384 static int open_tx_second(struct atm_vcc *vcc)
1385 {
1386 return 0; /* nothing to do */
1387 }
1388
1389
1390 static void close_tx(struct atm_vcc *vcc)
1391 {
1392 DECLARE_WAITQUEUE(wait,current);
1393 struct eni_dev *eni_dev;
1394 struct eni_vcc *eni_vcc;
1395
1396 eni_vcc = ENI_VCC(vcc);
1397 if (!eni_vcc->tx) return;
1398 eni_dev = ENI_DEV(vcc->dev);
1399 /* wait for TX queue to drain */
1400 DPRINTK("eni_close: waiting for TX ...\n");
1401 add_wait_queue(&eni_dev->tx_wait,&wait);
1402 set_current_state(TASK_UNINTERRUPTIBLE);
1403 for (;;) {
1404 int txing;
1405
1406 tasklet_disable(&eni_dev->task);
1407 txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing;
1408 tasklet_enable(&eni_dev->task);
1409 if (!txing) break;
1410 DPRINTK("%d TX left\n",eni_vcc->txing);
1411 schedule();
1412 set_current_state(TASK_UNINTERRUPTIBLE);
1413 }
1414 set_current_state(TASK_RUNNING);
1415 remove_wait_queue(&eni_dev->tx_wait,&wait);
1416 if (eni_vcc->tx != eni_dev->ubr) {
1417 /*
1418 * Looping a few times in here is probably far cheaper than
1419 * keeping track of TX completions all the time, so let's poll
1420 * a bit ...
1421 */
1422 while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) !=
1423 eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index)))
1424 schedule();
1425 eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2);
1426 eni_vcc->tx->send = NULL;
1427 eni_dev->tx_bw += eni_vcc->tx->reserved;
1428 }
1429 eni_vcc->tx = NULL;
1430 }
1431
1432
1433 static int start_tx(struct atm_dev *dev)
1434 {
1435 struct eni_dev *eni_dev;
1436 int i;
1437
1438 eni_dev = ENI_DEV(dev);
1439 eni_dev->lost = 0;
1440 eni_dev->tx_bw = ATM_OC3_PCR;
1441 eni_dev->tx_mult = DEFAULT_TX_MULT;
1442 init_waitqueue_head(&eni_dev->tx_wait);
1443 eni_dev->ubr = NULL;
1444 skb_queue_head_init(&eni_dev->tx_queue);
1445 eni_out(0,MID_DMA_WR_TX);
1446 for (i = 0; i < NR_CHAN; i++) {
1447 eni_dev->tx[i].send = NULL;
1448 eni_dev->tx[i].index = i;
1449 }
1450 return 0;
1451 }
1452
1453
1454 /*--------------------------------- common ----------------------------------*/
1455
1456
1457 #if 0 /* may become useful again when tuning things */
1458
1459 static void foo(void)
1460 {
1461 printk(KERN_INFO
1462 "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n"
1463 "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n",
1464 tx_complete,dma_complete,queued,requeued,submitted,backlogged,
1465 rx_enqueued,rx_dequeued,putting,pushed);
1466 if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost);
1467 }
1468
1469 #endif
1470
1471
1472 static void bug_int(struct atm_dev *dev,unsigned long reason)
1473 {
1474 DPRINTK(">bug_int\n");
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 char * const media_name[] = {
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 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 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 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 -ENOMEM;
1731 }
1732 eni_dev->ioaddr = base;
1733 eni_dev->base_diff = real_base - (unsigned long) base;
1734 /* id may not be present in ASIC Tonga boards - check this @@@ */
1735 if (!eni_dev->asic) {
1736 eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom));
1737 if (readl(&eprom->magic) != ENI155_MAGIC) {
1738 printk("\n");
1739 printk(KERN_ERR DEV_LABEL
1740 "(itf %d): bad magic - expected 0x%x, got 0x%x\n",
1741 dev->number, ENI155_MAGIC,
1742 (unsigned)readl(&eprom->magic));
1743 error = -EINVAL;
1744 goto unmap;
1745 }
1746 }
1747 eni_dev->phy = base+PHY_BASE;
1748 eni_dev->reg = base+REG_BASE;
1749 eni_dev->ram = base+RAM_BASE;
1750 last = MAP_MAX_SIZE-RAM_BASE;
1751 for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) {
1752 writel(0x55555555,eni_dev->ram+i);
1753 if (readl(eni_dev->ram+i) != 0x55555555) last = i;
1754 else {
1755 writel(0xAAAAAAAA,eni_dev->ram+i);
1756 if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i;
1757 else writel(i,eni_dev->ram+i);
1758 }
1759 }
1760 for (i = 0; i < last; i += RAM_INCREMENT)
1761 if (readl(eni_dev->ram+i) != i) break;
1762 eni_dev->mem = i;
1763 memset_io(eni_dev->ram,0,eni_dev->mem);
1764 /* TODO: should shrink allocation now */
1765 printk("mem=%dkB (",eni_dev->mem >> 10);
1766 /* TODO: check for non-SUNI, check for TAXI ? */
1767 if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) {
1768 printk(")\n");
1769 printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n",
1770 dev->number,(unsigned) eni_in(MID_RES_ID_MCON));
1771 error = -EINVAL;
1772 goto unmap;
1773 }
1774 error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base);
1775 if (error)
1776 goto unmap;
1777 for (i = 0; i < ESI_LEN; i++)
1778 printk("%s%02X",i ? "-" : "",dev->esi[i]);
1779 printk(")\n");
1780 printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number,
1781 eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA",
1782 media_name[eni_in(MID_RES_ID_MCON) & DAUGTHER_ID]);
1783
1784 error = suni_init(dev);
1785 if (error)
1786 goto unmap;
1787 out:
1788 return error;
1789 unmap:
1790 iounmap(base);
1791 goto out;
1792 }
1793
1794 static void eni_do_release(struct atm_dev *dev)
1795 {
1796 struct eni_dev *ed = ENI_DEV(dev);
1797
1798 dev->phy->stop(dev);
1799 dev->phy = NULL;
1800 iounmap(ed->ioaddr);
1801 }
1802
1803 static int eni_start(struct atm_dev *dev)
1804 {
1805 struct eni_dev *eni_dev;
1806
1807 void __iomem *buf;
1808 unsigned long buffer_mem;
1809 int error;
1810
1811 DPRINTK(">eni_start\n");
1812 eni_dev = ENI_DEV(dev);
1813 if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) {
1814 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
1815 dev->number,eni_dev->irq);
1816 error = -EAGAIN;
1817 goto out;
1818 }
1819 pci_set_master(eni_dev->pci_dev);
1820 if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND,
1821 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
1822 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1823 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+"
1824 "master (0x%02x)\n",dev->number,error);
1825 goto free_irq;
1826 }
1827 if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,
1828 END_SWAP_DMA))) {
1829 printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap "
1830 "(0x%02x)\n",dev->number,error);
1831 goto free_irq;
1832 }
1833 /* determine addresses of internal tables */
1834 eni_dev->vci = eni_dev->ram;
1835 eni_dev->rx_dma = eni_dev->ram+NR_VCI*16;
1836 eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8;
1837 eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8;
1838 buf = eni_dev->service+NR_SERVICE*4;
1839 DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n",
1840 eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma,
1841 eni_dev->service,buf);
1842 spin_lock_init(&eni_dev->lock);
1843 tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev);
1844 eni_dev->events = 0;
1845 /* initialize memory management */
1846 buffer_mem = eni_dev->mem - (buf - eni_dev->ram);
1847 eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2;
1848 eni_dev->free_list = kmalloc_array(eni_dev->free_list_size + 1,
1849 sizeof(*eni_dev->free_list),
1850 GFP_KERNEL);
1851 if (!eni_dev->free_list) {
1852 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
1853 dev->number);
1854 error = -ENOMEM;
1855 goto free_irq;
1856 }
1857 eni_dev->free_len = 0;
1858 eni_put_free(eni_dev,buf,buffer_mem);
1859 memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */
1860 /*
1861 * byte_addr free (k)
1862 * 0x00000000 512 VCI table
1863 * 0x00004000 496 RX DMA
1864 * 0x00005000 492 TX DMA
1865 * 0x00006000 488 service list
1866 * 0x00007000 484 buffers
1867 * 0x00080000 0 end (512kB)
1868 */
1869 eni_out(0xffffffff,MID_IE);
1870 error = start_tx(dev);
1871 if (error) goto free_list;
1872 error = start_rx(dev);
1873 if (error) goto free_list;
1874 error = dev->phy->start(dev);
1875 if (error) goto free_list;
1876 eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) |
1877 MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE,
1878 MID_MC_S);
1879 /* Tonga uses SBus INTReq1 */
1880 (void) eni_in(MID_ISA); /* clear Midway interrupts */
1881 return 0;
1882
1883 free_list:
1884 kfree(eni_dev->free_list);
1885
1886 free_irq:
1887 free_irq(eni_dev->irq, dev);
1888
1889 out:
1890 return error;
1891 }
1892
1893
1894 static void eni_close(struct atm_vcc *vcc)
1895 {
1896 DPRINTK(">eni_close\n");
1897 if (!ENI_VCC(vcc)) return;
1898 clear_bit(ATM_VF_READY,&vcc->flags);
1899 close_rx(vcc);
1900 close_tx(vcc);
1901 DPRINTK("eni_close: done waiting\n");
1902 /* deallocate memory */
1903 kfree(ENI_VCC(vcc));
1904 vcc->dev_data = NULL;
1905 clear_bit(ATM_VF_ADDR,&vcc->flags);
1906 /*foo();*/
1907 }
1908
1909
1910 static int eni_open(struct atm_vcc *vcc)
1911 {
1912 struct eni_vcc *eni_vcc;
1913 int error;
1914 short vpi = vcc->vpi;
1915 int vci = vcc->vci;
1916
1917 DPRINTK(">eni_open\n");
1918 EVENT("eni_open\n",0,0);
1919 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1920 vcc->dev_data = NULL;
1921 if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
1922 set_bit(ATM_VF_ADDR,&vcc->flags);
1923 if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5)
1924 return -EINVAL;
1925 DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi,
1926 vcc->vci);
1927 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
1928 eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL);
1929 if (!eni_vcc) return -ENOMEM;
1930 vcc->dev_data = eni_vcc;
1931 eni_vcc->tx = NULL; /* for eni_close after open_rx */
1932 if ((error = open_rx_first(vcc))) {
1933 eni_close(vcc);
1934 return error;
1935 }
1936 if ((error = open_tx_first(vcc))) {
1937 eni_close(vcc);
1938 return error;
1939 }
1940 }
1941 if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0;
1942 if ((error = open_rx_second(vcc))) {
1943 eni_close(vcc);
1944 return error;
1945 }
1946 if ((error = open_tx_second(vcc))) {
1947 eni_close(vcc);
1948 return error;
1949 }
1950 set_bit(ATM_VF_READY,&vcc->flags);
1951 /* should power down SUNI while !ref_count @@@ */
1952 return 0;
1953 }
1954
1955
1956 static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs)
1957 {
1958 struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1959 struct eni_tx *tx = ENI_VCC(vcc)->tx;
1960 struct sk_buff *skb;
1961 int error,rate,rsv,shp;
1962
1963 if (qos->txtp.traffic_class == ATM_NONE) return 0;
1964 if (tx == eni_dev->ubr) return -EBADFD;
1965 rate = atm_pcr_goal(&qos->txtp);
1966 if (rate < 0) rate = -rate;
1967 rsv = shp = 0;
1968 if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1;
1969 if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1;
1970 if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1;
1971 if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1;
1972 if (!rsv && !shp) return 0;
1973 error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp);
1974 if (error) return error;
1975 if (shp && !(flgs & ATM_MF_IMMED)) return 0;
1976 /*
1977 * Walk through the send buffer and patch the rate information in all
1978 * segmentation buffer descriptors of this VCC.
1979 */
1980 tasklet_disable(&eni_dev->task);
1981 skb_queue_walk(&eni_dev->tx_queue, skb) {
1982 void __iomem *dsc;
1983
1984 if (ATM_SKB(skb)->vcc != vcc) continue;
1985 dsc = tx->send+ENI_PRV_POS(skb)*4;
1986 writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) |
1987 (tx->prescaler << MID_SEG_PR_SHIFT) |
1988 (tx->resolution << MID_SEG_RATE_SHIFT), dsc);
1989 }
1990 tasklet_enable(&eni_dev->task);
1991 return 0;
1992 }
1993
1994
1995 static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
1996 {
1997 struct eni_dev *eni_dev = ENI_DEV(dev);
1998
1999 if (cmd == ENI_MEMDUMP) {
2000 if (!capable(CAP_NET_ADMIN)) return -EPERM;
2001 printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d "
2002 "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number);
2003 dump(dev);
2004 return 0;
2005 }
2006 if (cmd == ENI_SETMULT) {
2007 struct eni_multipliers mult;
2008
2009 if (!capable(CAP_NET_ADMIN)) return -EPERM;
2010 if (copy_from_user(&mult, arg,
2011 sizeof(struct eni_multipliers)))
2012 return -EFAULT;
2013 if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) ||
2014 mult.tx > 65536 || mult.rx > 65536)
2015 return -EINVAL;
2016 if (mult.tx) eni_dev->tx_mult = mult.tx;
2017 if (mult.rx) eni_dev->rx_mult = mult.rx;
2018 return 0;
2019 }
2020 if (cmd == ATM_SETCIRANGE) {
2021 struct atm_cirange ci;
2022
2023 if (copy_from_user(&ci, arg,sizeof(struct atm_cirange)))
2024 return -EFAULT;
2025 if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) &&
2026 (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX))
2027 return 0;
2028 return -EINVAL;
2029 }
2030 if (!dev->phy->ioctl) return -ENOIOCTLCMD;
2031 return dev->phy->ioctl(dev,cmd,arg);
2032 }
2033
2034
2035 static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname,
2036 void __user *optval,int optlen)
2037 {
2038 return -EINVAL;
2039 }
2040
2041
2042 static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname,
2043 void __user *optval,unsigned int optlen)
2044 {
2045 return -EINVAL;
2046 }
2047
2048
2049 static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb)
2050 {
2051 enum enq_res res;
2052
2053 DPRINTK(">eni_send\n");
2054 if (!ENI_VCC(vcc)->tx) {
2055 if (vcc->pop) vcc->pop(vcc,skb);
2056 else dev_kfree_skb(skb);
2057 return -EINVAL;
2058 }
2059 if (!skb) {
2060 printk(KERN_CRIT "!skb in eni_send ?\n");
2061 if (vcc->pop) vcc->pop(vcc,skb);
2062 return -EINVAL;
2063 }
2064 if (vcc->qos.aal == ATM_AAL0) {
2065 if (skb->len != ATM_CELL_SIZE-1) {
2066 if (vcc->pop) vcc->pop(vcc,skb);
2067 else dev_kfree_skb(skb);
2068 return -EINVAL;
2069 }
2070 *(u32 *) skb->data = htonl(*(u32 *) skb->data);
2071 }
2072 submitted++;
2073 ATM_SKB(skb)->vcc = vcc;
2074 tasklet_disable(&ENI_DEV(vcc->dev)->task);
2075 res = do_tx(skb);
2076 tasklet_enable(&ENI_DEV(vcc->dev)->task);
2077 if (res == enq_ok) return 0;
2078 skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb);
2079 backlogged++;
2080 tasklet_schedule(&ENI_DEV(vcc->dev)->task);
2081 return 0;
2082 }
2083
2084 static void eni_phy_put(struct atm_dev *dev,unsigned char value,
2085 unsigned long addr)
2086 {
2087 writel(value,ENI_DEV(dev)->phy+addr*4);
2088 }
2089
2090
2091
2092 static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr)
2093 {
2094 return readl(ENI_DEV(dev)->phy+addr*4);
2095 }
2096
2097
2098 static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page)
2099 {
2100 struct sock *s;
2101 static const char *signal[] = { "LOST","unknown","okay" };
2102 struct eni_dev *eni_dev = ENI_DEV(dev);
2103 struct atm_vcc *vcc;
2104 int left,i;
2105
2106 left = *pos;
2107 if (!left)
2108 return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, "
2109 "%d cps remaining\n",dev->number,signal[(int) dev->signal],
2110 eni_dev->mem >> 10,eni_dev->tx_bw);
2111 if (!--left)
2112 return sprintf(page,"%4sBursts: TX"
2113 #if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \
2114 !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \
2115 !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \
2116 !defined(CONFIG_ATM_ENI_BURST_TX_2W)
2117 " none"
2118 #endif
2119 #ifdef CONFIG_ATM_ENI_BURST_TX_16W
2120 " 16W"
2121 #endif
2122 #ifdef CONFIG_ATM_ENI_BURST_TX_8W
2123 " 8W"
2124 #endif
2125 #ifdef CONFIG_ATM_ENI_BURST_TX_4W
2126 " 4W"
2127 #endif
2128 #ifdef CONFIG_ATM_ENI_BURST_TX_2W
2129 " 2W"
2130 #endif
2131 ", RX"
2132 #if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \
2133 !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \
2134 !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \
2135 !defined(CONFIG_ATM_ENI_BURST_RX_2W)
2136 " none"
2137 #endif
2138 #ifdef CONFIG_ATM_ENI_BURST_RX_16W
2139 " 16W"
2140 #endif
2141 #ifdef CONFIG_ATM_ENI_BURST_RX_8W
2142 " 8W"
2143 #endif
2144 #ifdef CONFIG_ATM_ENI_BURST_RX_4W
2145 " 4W"
2146 #endif
2147 #ifdef CONFIG_ATM_ENI_BURST_RX_2W
2148 " 2W"
2149 #endif
2150 #ifndef CONFIG_ATM_ENI_TUNE_BURST
2151 " (default)"
2152 #endif
2153 "\n","");
2154 if (!--left)
2155 return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n",
2156 "",eni_dev->tx_mult,eni_dev->rx_mult);
2157 for (i = 0; i < NR_CHAN; i++) {
2158 struct eni_tx *tx = eni_dev->tx+i;
2159
2160 if (!tx->send) continue;
2161 if (!--left) {
2162 return sprintf(page, "tx[%d]: 0x%lx-0x%lx "
2163 "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i,
2164 (unsigned long) (tx->send - eni_dev->ram),
2165 tx->send-eni_dev->ram+tx->words*4-1,tx->words*4,
2166 tx->reserved,tx->shaping,
2167 tx == eni_dev->ubr ? " (UBR)" : "");
2168 }
2169 if (--left) continue;
2170 return sprintf(page,"%10sbacklog %u packets\n","",
2171 skb_queue_len(&tx->backlog));
2172 }
2173 read_lock(&vcc_sklist_lock);
2174 for(i = 0; i < VCC_HTABLE_SIZE; ++i) {
2175 struct hlist_head *head = &vcc_hash[i];
2176
2177 sk_for_each(s, head) {
2178 struct eni_vcc *eni_vcc;
2179 int length;
2180
2181 vcc = atm_sk(s);
2182 if (vcc->dev != dev)
2183 continue;
2184 eni_vcc = ENI_VCC(vcc);
2185 if (--left) continue;
2186 length = sprintf(page,"vcc %4d: ",vcc->vci);
2187 if (eni_vcc->rx) {
2188 length += sprintf(page+length, "0x%lx-0x%lx "
2189 "(%6ld bytes)",
2190 (unsigned long) (eni_vcc->recv - eni_dev->ram),
2191 eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1,
2192 eni_vcc->words*4);
2193 if (eni_vcc->tx) length += sprintf(page+length,", ");
2194 }
2195 if (eni_vcc->tx)
2196 length += sprintf(page+length,"tx[%d], txing %d bytes",
2197 eni_vcc->tx->index,eni_vcc->txing);
2198 page[length] = '\n';
2199 read_unlock(&vcc_sklist_lock);
2200 return length+1;
2201 }
2202 }
2203 read_unlock(&vcc_sklist_lock);
2204 for (i = 0; i < eni_dev->free_len; i++) {
2205 struct eni_free *fe = eni_dev->free_list+i;
2206 unsigned long offset;
2207
2208 if (--left) continue;
2209 offset = (unsigned long) eni_dev->ram+eni_dev->base_diff;
2210 return sprintf(page,"free %p-%p (%6d bytes)\n",
2211 fe->start-offset,fe->start-offset+(1 << fe->order)-1,
2212 1 << fe->order);
2213 }
2214 return 0;
2215 }
2216
2217
2218 static const struct atmdev_ops ops = {
2219 .open = eni_open,
2220 .close = eni_close,
2221 .ioctl = eni_ioctl,
2222 .getsockopt = eni_getsockopt,
2223 .setsockopt = eni_setsockopt,
2224 .send = eni_send,
2225 .phy_put = eni_phy_put,
2226 .phy_get = eni_phy_get,
2227 .change_qos = eni_change_qos,
2228 .proc_read = eni_proc_read
2229 };
2230
2231
2232 static int eni_init_one(struct pci_dev *pci_dev,
2233 const struct pci_device_id *ent)
2234 {
2235 struct atm_dev *dev;
2236 struct eni_dev *eni_dev;
2237 struct eni_zero *zero;
2238 int rc;
2239
2240 rc = pci_enable_device(pci_dev);
2241 if (rc < 0)
2242 goto out;
2243
2244 rc = dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(32));
2245 if (rc < 0)
2246 goto out;
2247
2248 rc = -ENOMEM;
2249 eni_dev = kmalloc(sizeof(struct eni_dev), GFP_KERNEL);
2250 if (!eni_dev)
2251 goto err_disable;
2252
2253 zero = &eni_dev->zero;
2254 zero->addr = dma_alloc_coherent(&pci_dev->dev,
2255 ENI_ZEROES_SIZE, &zero->dma, GFP_KERNEL);
2256 if (!zero->addr)
2257 goto err_kfree;
2258
2259 dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL);
2260 if (!dev)
2261 goto err_free_consistent;
2262
2263 dev->dev_data = eni_dev;
2264 pci_set_drvdata(pci_dev, dev);
2265 eni_dev->pci_dev = pci_dev;
2266 eni_dev->asic = ent->driver_data;
2267
2268 rc = eni_do_init(dev);
2269 if (rc < 0)
2270 goto err_unregister;
2271
2272 rc = eni_start(dev);
2273 if (rc < 0)
2274 goto err_eni_release;
2275
2276 eni_dev->more = eni_boards;
2277 eni_boards = dev;
2278 out:
2279 return rc;
2280
2281 err_eni_release:
2282 eni_do_release(dev);
2283 err_unregister:
2284 atm_dev_deregister(dev);
2285 err_free_consistent:
2286 dma_free_coherent(&pci_dev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2287 err_kfree:
2288 kfree(eni_dev);
2289 err_disable:
2290 pci_disable_device(pci_dev);
2291 goto out;
2292 }
2293
2294
2295 static struct pci_device_id eni_pci_tbl[] = {
2296 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_FPGA), 0 /* FPGA */ },
2297 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_ASIC), 1 /* ASIC */ },
2298 { 0, }
2299 };
2300 MODULE_DEVICE_TABLE(pci,eni_pci_tbl);
2301
2302
2303 static void eni_remove_one(struct pci_dev *pdev)
2304 {
2305 struct atm_dev *dev = pci_get_drvdata(pdev);
2306 struct eni_dev *ed = ENI_DEV(dev);
2307 struct eni_zero *zero = &ed->zero;
2308
2309 eni_do_release(dev);
2310 atm_dev_deregister(dev);
2311 dma_free_coherent(&pdev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2312 kfree(ed);
2313 pci_disable_device(pdev);
2314 }
2315
2316
2317 static struct pci_driver eni_driver = {
2318 .name = DEV_LABEL,
2319 .id_table = eni_pci_tbl,
2320 .probe = eni_init_one,
2321 .remove = eni_remove_one,
2322 };
2323
2324
2325 static int __init eni_init(void)
2326 {
2327 struct sk_buff *skb; /* dummy for sizeof */
2328
2329 if (sizeof(skb->cb) < sizeof(struct eni_skb_prv)) {
2330 printk(KERN_ERR "eni_detect: skb->cb is too small (%Zd < %Zd)\n",
2331 sizeof(skb->cb),sizeof(struct eni_skb_prv));
2332 return -EIO;
2333 }
2334 return pci_register_driver(&eni_driver);
2335 }
2336
2337
2338 module_init(eni_init);
2339 /* @@@ since exit routine not defined, this module can not be unloaded */
2340
2341 MODULE_LICENSE("GPL");
Linux with added FPC-III support