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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / atm / eni.c
blob17d47ad03ab79e33cd8c57a453a84505e4530c82
1 // SPDX-License-Identifier: GPL-2.0-only
2 /* drivers/atm/eni.c - Efficient Networks ENI155P device driver */
3
4 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
5
6
7 #include <linux/module.h>
8 #include <linux/kernel.h>
9 #include <linux/mm.h>
10 #include <linux/pci.h>
11 #include <linux/errno.h>
12 #include <linux/atm.h>
13 #include <linux/atmdev.h>
14 #include <linux/sonet.h>
15 #include <linux/skbuff.h>
16 #include <linux/time.h>
17 #include <linux/delay.h>
18 #include <linux/uio.h>
19 #include <linux/init.h>
20 #include <linux/atm_eni.h>
21 #include <linux/bitops.h>
22 #include <linux/slab.h>
23 #include <asm/io.h>
24 #include <linux/atomic.h>
25 #include <linux/uaccess.h>
26 #include <asm/string.h>
27 #include <asm/byteorder.h>
28
29 #include "tonga.h"
30 #include "midway.h"
31 #include "suni.h"
32 #include "eni.h"
33
34 /*
35 * TODO:
36 *
37 * Show stoppers
38 * none
39 *
40 * Minor
41 * - OAM support
42 * - fix bugs listed below
43 */
44
45 /*
46 * KNOWN BUGS:
47 *
48 * - may run into JK-JK bug and deadlock
49 * - should allocate UBR channel first
50 * - buffer space allocation algorithm is stupid
51 * (RX: should be maxSDU+maxdelay*rate
52 * TX: should be maxSDU+min(maxSDU,maxdelay*rate) )
53 * - doesn't support OAM cells
54 * - eni_put_free may hang if not putting memory fragments that _complete_
55 * 2^n block (never happens in real life, though)
56 */
57
58
59 #if 0
60 #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
61 #else
62 #define DPRINTK(format,args...)
63 #endif
64
65
66 #ifndef CONFIG_ATM_ENI_TUNE_BURST
67 #define CONFIG_ATM_ENI_BURST_TX_8W
68 #define CONFIG_ATM_ENI_BURST_RX_4W
69 #endif
70
71
72 #ifndef CONFIG_ATM_ENI_DEBUG
73
74
75 #define NULLCHECK(x)
76
77 #define EVENT(s,a,b)
78
79
80 static void event_dump(void)
81 {
82 }
83
84
85 #else
86
87
88 /*
89 * NULL pointer checking
90 */
91
92 #define NULLCHECK(x) \
93 if ((unsigned long) (x) < 0x30) \
94 printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x))
95
96 /*
97 * Very extensive activity logging. Greatly improves bug detection speed but
98 * costs a few Mbps if enabled.
99 */
100
101 #define EV 64
102
103 static const char *ev[EV];
104 static unsigned long ev_a[EV],ev_b[EV];
105 static int ec = 0;
106
107
108 static void EVENT(const char *s,unsigned long a,unsigned long b)
109 {
110 ev[ec] = s;
111 ev_a[ec] = a;
112 ev_b[ec] = b;
113 ec = (ec+1) % EV;
114 }
115
116
117 static void event_dump(void)
118 {
119 int n,i;
120
121 for (n = 0; n < EV; n++) {
122 i = (ec+n) % EV;
123 printk(KERN_NOTICE);
124 printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]);
125 }
126 }
127
128
129 #endif /* CONFIG_ATM_ENI_DEBUG */
130
131
132 /*
133 * NExx must not be equal at end
134 * EExx may be equal at end
135 * xxPJOK verify validity of pointer jumps
136 * xxPMOK operating on a circular buffer of "c" words
137 */
138
139 #define NEPJOK(a0,a1,b) \
140 ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1))
141 #define EEPJOK(a0,a1,b) \
142 ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1))
143 #define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b)
144 #define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b)
145
146
147 static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0,
148 backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0,
149 putting = 0;
150
151 static struct atm_dev *eni_boards = NULL;
152
153 /* Read/write registers on card */
154 #define eni_in(r) readl(eni_dev->reg+(r)*4)
155 #define eni_out(v,r) writel((v),eni_dev->reg+(r)*4)
156
157
158 /*-------------------------------- utilities --------------------------------*/
159
160
161 static void dump_mem(struct eni_dev *eni_dev)
162 {
163 int i;
164
165 for (i = 0; i < eni_dev->free_len; i++)
166 printk(KERN_DEBUG " %d: %p %d\n",i,
167 eni_dev->free_list[i].start,
168 1 << eni_dev->free_list[i].order);
169 }
170
171
172 static void dump(struct atm_dev *dev)
173 {
174 struct eni_dev *eni_dev;
175
176 int i;
177
178 eni_dev = ENI_DEV(dev);
179 printk(KERN_NOTICE "Free memory\n");
180 dump_mem(eni_dev);
181 printk(KERN_NOTICE "TX buffers\n");
182 for (i = 0; i < NR_CHAN; i++)
183 if (eni_dev->tx[i].send)
184 printk(KERN_NOTICE " TX %d @ %p: %ld\n",i,
185 eni_dev->tx[i].send,eni_dev->tx[i].words*4);
186 printk(KERN_NOTICE "RX buffers\n");
187 for (i = 0; i < 1024; i++)
188 if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx)
189 printk(KERN_NOTICE " RX %d @ %p: %ld\n",i,
190 ENI_VCC(eni_dev->rx_map[i])->recv,
191 ENI_VCC(eni_dev->rx_map[i])->words*4);
192 printk(KERN_NOTICE "----\n");
193 }
194
195
196 static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start,
197 unsigned long size)
198 {
199 struct eni_free *list;
200 int len,order;
201
202 DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size);
203 start += eni_dev->base_diff;
204 list = eni_dev->free_list;
205 len = eni_dev->free_len;
206 while (size) {
207 if (len >= eni_dev->free_list_size) {
208 printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n",
209 start,size);
210 break;
211 }
212 for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++);
213 if (MID_MIN_BUF_SIZE > (1 << order)) {
214 printk(KERN_CRIT "eni_put_free: order %d too small\n",
215 order);
216 break;
217 }
218 list[len].start = (void __iomem *) start;
219 list[len].order = order;
220 len++;
221 start += 1 << order;
222 size -= 1 << order;
223 }
224 eni_dev->free_len = len;
225 /*dump_mem(eni_dev);*/
226 }
227
228
229 static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size)
230 {
231 struct eni_free *list;
232 void __iomem *start;
233 int len,i,order,best_order,index;
234
235 list = eni_dev->free_list;
236 len = eni_dev->free_len;
237 if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE;
238 if (*size > MID_MAX_BUF_SIZE) return NULL;
239 for (order = 0; (1 << order) < *size; order++)
240 ;
241 DPRINTK("trying: %ld->%d\n",*size,order);
242 best_order = 65; /* we don't have more than 2^64 of anything ... */
243 index = 0; /* silence GCC */
244 for (i = 0; i < len; i++)
245 if (list[i].order == order) {
246 best_order = order;
247 index = i;
248 break;
249 }
250 else if (best_order > list[i].order && list[i].order > order) {
251 best_order = list[i].order;
252 index = i;
253 }
254 if (best_order == 65) return NULL;
255 start = list[index].start-eni_dev->base_diff;
256 list[index] = list[--len];
257 eni_dev->free_len = len;
258 *size = 1 << order;
259 eni_put_free(eni_dev,start+*size,(1 << best_order)-*size);
260 DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start);
261 memset_io(start,0,*size); /* never leak data */
262 /*dump_mem(eni_dev);*/
263 return start;
264 }
265
266
267 static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start,
268 unsigned long size)
269 {
270 struct eni_free *list;
271 int len,i,order;
272
273 start += eni_dev->base_diff;
274 list = eni_dev->free_list;
275 len = eni_dev->free_len;
276 for (order = -1; size; order++) size >>= 1;
277 DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order);
278 for (i = 0; i < len; i++)
279 if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) &&
280 list[i].order == order) {
281 DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i,
282 list[i].start,start,1 << order,list[i].order,order);
283 list[i] = list[--len];
284 start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order));
285 order++;
286 i = -1;
287 continue;
288 }
289 if (len >= eni_dev->free_list_size) {
290 printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start,
291 order);
292 return;
293 }
294 list[len].start = start;
295 list[len].order = order;
296 eni_dev->free_len = len+1;
297 /*dump_mem(eni_dev);*/
298 }
299
300
301 /*----------------------------------- RX ------------------------------------*/
302
303
304 #define ENI_VCC_NOS ((struct atm_vcc *) 1)
305
306
307 static void rx_ident_err(struct atm_vcc *vcc)
308 {
309 struct atm_dev *dev;
310 struct eni_dev *eni_dev;
311 struct eni_vcc *eni_vcc;
312
313 dev = vcc->dev;
314 eni_dev = ENI_DEV(dev);
315 /* immediately halt adapter */
316 eni_out(eni_in(MID_MC_S) &
317 ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S);
318 /* dump useful information */
319 eni_vcc = ENI_VCC(vcc);
320 printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident "
321 "mismatch\n",dev->number);
322 printk(KERN_ALERT " VCI %d, rxing %d, words %ld\n",vcc->vci,
323 eni_vcc->rxing,eni_vcc->words);
324 printk(KERN_ALERT " host descr 0x%lx, rx pos 0x%lx, descr value "
325 "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos,
326 (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4));
327 printk(KERN_ALERT " last %p, servicing %d\n",eni_vcc->last,
328 eni_vcc->servicing);
329 EVENT("---dump ends here---\n",0,0);
330 printk(KERN_NOTICE "---recent events---\n");
331 event_dump();
332 ENI_DEV(dev)->fast = NULL; /* really stop it */
333 ENI_DEV(dev)->slow = NULL;
334 skb_queue_head_init(&ENI_DEV(dev)->rx_queue);
335 }
336
337
338 static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb,
339 unsigned long skip,unsigned long size,unsigned long eff)
340 {
341 struct eni_dev *eni_dev;
342 struct eni_vcc *eni_vcc;
343 u32 dma_rd,dma_wr;
344 u32 dma[RX_DMA_BUF*2];
345 dma_addr_t paddr;
346 unsigned long here;
347 int i,j;
348
349 eni_dev = ENI_DEV(vcc->dev);
350 eni_vcc = ENI_VCC(vcc);
351 paddr = 0; /* GCC, shut up */
352 if (skb) {
353 paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len,
354 DMA_FROM_DEVICE);
355 if (dma_mapping_error(&eni_dev->pci_dev->dev, paddr))
356 goto dma_map_error;
357 ENI_PRV_PADDR(skb) = paddr;
358 if (paddr & 3)
359 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has "
360 "mis-aligned RX data (0x%lx)\n",vcc->dev->number,
361 vcc->vci,(unsigned long) paddr);
362 ENI_PRV_SIZE(skb) = size+skip;
363 /* PDU plus descriptor */
364 ATM_SKB(skb)->vcc = vcc;
365 }
366 j = 0;
367 if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */
368 here = (eni_vcc->descr+skip) & (eni_vcc->words-1);
369 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci
370 << MID_DMA_VCI_SHIFT) | MID_DT_JK;
371 dma[j++] = 0;
372 }
373 here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1);
374 if (!eff) size += skip;
375 else {
376 unsigned long words;
377
378 if (!size) {
379 DPRINTK("strange things happen ...\n");
380 EVENT("strange things happen ... (skip=%ld,eff=%ld)\n",
381 size,eff);
382 }
383 words = eff;
384 if (paddr & 15) {
385 unsigned long init;
386
387 init = 4-((paddr & 15) >> 2);
388 if (init > words) init = words;
389 dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
390 (vcc->vci << MID_DMA_VCI_SHIFT);
391 dma[j++] = paddr;
392 paddr += init << 2;
393 words -= init;
394 }
395 #ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */
396 if (words & ~15) {
397 dma[j++] = MID_DT_16W | ((words >> 4) <<
398 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
399 MID_DMA_VCI_SHIFT);
400 dma[j++] = paddr;
401 paddr += (words & ~15) << 2;
402 words &= 15;
403 }
404 #endif
405 #ifdef CONFIG_ATM_ENI_BURST_RX_8W /* works only with *some* PCI chipsets ... */
406 if (words & ~7) {
407 dma[j++] = MID_DT_8W | ((words >> 3) <<
408 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
409 MID_DMA_VCI_SHIFT);
410 dma[j++] = paddr;
411 paddr += (words & ~7) << 2;
412 words &= 7;
413 }
414 #endif
415 #ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */
416 if (words & ~3) {
417 dma[j++] = MID_DT_4W | ((words >> 2) <<
418 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
419 MID_DMA_VCI_SHIFT);
420 dma[j++] = paddr;
421 paddr += (words & ~3) << 2;
422 words &= 3;
423 }
424 #endif
425 #ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */
426 if (words & ~1) {
427 dma[j++] = MID_DT_2W | ((words >> 1) <<
428 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
429 MID_DMA_VCI_SHIFT);
430 dma[j++] = paddr;
431 paddr += (words & ~1) << 2;
432 words &= 1;
433 }
434 #endif
435 if (words) {
436 dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT)
437 | (vcc->vci << MID_DMA_VCI_SHIFT);
438 dma[j++] = paddr;
439 }
440 }
441 if (size != eff) {
442 dma[j++] = (here << MID_DMA_COUNT_SHIFT) |
443 (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK;
444 dma[j++] = 0;
445 }
446 if (!j || j > 2*RX_DMA_BUF) {
447 printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n");
448 goto trouble;
449 }
450 dma[j-2] |= MID_DMA_END;
451 j = j >> 1;
452 dma_wr = eni_in(MID_DMA_WR_RX);
453 dma_rd = eni_in(MID_DMA_RD_RX);
454 /*
455 * Can I move the dma_wr pointer by 2j+1 positions without overwriting
456 * data that hasn't been read (position of dma_rd) yet ?
457 */
458 if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */
459 printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n",
460 vcc->dev->number);
461 goto trouble;
462 }
463 for (i = 0; i < j; i++) {
464 writel(dma[i*2],eni_dev->rx_dma+dma_wr*8);
465 writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4);
466 dma_wr = (dma_wr+1) & (NR_DMA_RX-1);
467 }
468 if (skb) {
469 ENI_PRV_POS(skb) = eni_vcc->descr+size+1;
470 skb_queue_tail(&eni_dev->rx_queue,skb);
471 eni_vcc->last = skb;
472 rx_enqueued++;
473 }
474 eni_vcc->descr = here;
475 eni_out(dma_wr,MID_DMA_WR_RX);
476 return 0;
477
478 trouble:
479 if (paddr)
480 dma_unmap_single(&eni_dev->pci_dev->dev,paddr,skb->len,
481 DMA_FROM_DEVICE);
482 dma_map_error:
483 if (skb) dev_kfree_skb_irq(skb);
484 return -1;
485 }
486
487
488 static void discard(struct atm_vcc *vcc,unsigned long size)
489 {
490 struct eni_vcc *eni_vcc;
491
492 eni_vcc = ENI_VCC(vcc);
493 EVENT("discard (size=%ld)\n",size,0);
494 while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0);
495 /* could do a full fallback, but that might be more expensive */
496 if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1;
497 else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1);
498 }
499
500
501 /*
502 * TODO: should check whether direct copies (without DMA setup, dequeuing on
503 * interrupt, etc.) aren't much faster for AAL0
504 */
505
506 static int rx_aal0(struct atm_vcc *vcc)
507 {
508 struct eni_vcc *eni_vcc;
509 unsigned long descr;
510 unsigned long length;
511 struct sk_buff *skb;
512
513 DPRINTK(">rx_aal0\n");
514 eni_vcc = ENI_VCC(vcc);
515 descr = readl(eni_vcc->recv+eni_vcc->descr*4);
516 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
517 rx_ident_err(vcc);
518 return 1;
519 }
520 if (descr & MID_RED_T) {
521 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
522 vcc->dev->number);
523 length = 0;
524 atomic_inc(&vcc->stats->rx_err);
525 }
526 else {
527 length = ATM_CELL_SIZE-1; /* no HEC */
528 }
529 skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL;
530 if (!skb) {
531 discard(vcc,length >> 2);
532 return 0;
533 }
534 skb_put(skb,length);
535 skb->tstamp = eni_vcc->timestamp;
536 DPRINTK("got len %ld\n",length);
537 if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1;
538 eni_vcc->rxing++;
539 return 0;
540 }
541
542
543 static int rx_aal5(struct atm_vcc *vcc)
544 {
545 struct eni_vcc *eni_vcc;
546 unsigned long descr;
547 unsigned long size,eff,length;
548 struct sk_buff *skb;
549
550 EVENT("rx_aal5\n",0,0);
551 DPRINTK(">rx_aal5\n");
552 eni_vcc = ENI_VCC(vcc);
553 descr = readl(eni_vcc->recv+eni_vcc->descr*4);
554 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
555 rx_ident_err(vcc);
556 return 1;
557 }
558 if (descr & (MID_RED_T | MID_RED_CRC_ERR)) {
559 if (descr & MID_RED_T) {
560 EVENT("empty cell (descr=0x%lx)\n",descr,0);
561 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
562 vcc->dev->number);
563 size = 0;
564 }
565 else {
566 static unsigned long silence = 0;
567
568 if (time_after(jiffies, silence) || silence == 0) {
569 printk(KERN_WARNING DEV_LABEL "(itf %d): "
570 "discarding PDU(s) with CRC error\n",
571 vcc->dev->number);
572 silence = (jiffies+2*HZ)|1;
573 }
574 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
575 EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr,
576 size);
577 }
578 eff = length = 0;
579 atomic_inc(&vcc->stats->rx_err);
580 }
581 else {
582 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
583 DPRINTK("size=%ld\n",size);
584 length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) &
585 (eni_vcc->words-1)))*4) & 0xffff;
586 /* -trailer(2)+header(1) */
587 if (length && length <= (size << 2)-8 && length <=
588 ATM_MAX_AAL5_PDU) eff = (length+3) >> 2;
589 else { /* ^ trailer length (8) */
590 EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr,
591 length);
592 printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU "
593 "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n",
594 vcc->dev->number,vcc->vci,length,size << 2,descr);
595 length = eff = 0;
596 atomic_inc(&vcc->stats->rx_err);
597 }
598 }
599 skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL;
600 if (!skb) {
601 discard(vcc,size);
602 return 0;
603 }
604 skb_put(skb,length);
605 DPRINTK("got len %ld\n",length);
606 if (do_rx_dma(vcc,skb,1,size,eff)) return 1;
607 eni_vcc->rxing++;
608 return 0;
609 }
610
611
612 static inline int rx_vcc(struct atm_vcc *vcc)
613 {
614 void __iomem *vci_dsc;
615 unsigned long tmp;
616 struct eni_vcc *eni_vcc;
617
618 eni_vcc = ENI_VCC(vcc);
619 vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16;
620 EVENT("rx_vcc(1)\n",0,0);
621 while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >>
622 MID_VCI_DESCR_SHIFT)) {
623 EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n",
624 eni_vcc->descr,tmp);
625 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
626 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
627 MID_VCI_DESCR_SHIFT));
628 if (ENI_VCC(vcc)->rx(vcc)) return 1;
629 }
630 /* clear IN_SERVICE flag */
631 writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc);
632 /*
633 * If new data has arrived between evaluating the while condition and
634 * clearing IN_SERVICE, we wouldn't be notified until additional data
635 * follows. So we have to loop again to be sure.
636 */
637 EVENT("rx_vcc(3)\n",0,0);
638 while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR)
639 >> MID_VCI_DESCR_SHIFT)) {
640 EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n",
641 eni_vcc->descr,tmp);
642 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
643 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
644 MID_VCI_DESCR_SHIFT));
645 if (ENI_VCC(vcc)->rx(vcc)) return 1;
646 }
647 return 0;
648 }
649
650
651 static void poll_rx(struct atm_dev *dev)
652 {
653 struct eni_dev *eni_dev;
654 struct atm_vcc *curr;
655
656 eni_dev = ENI_DEV(dev);
657 while ((curr = eni_dev->fast)) {
658 EVENT("poll_rx.fast\n",0,0);
659 if (rx_vcc(curr)) return;
660 eni_dev->fast = ENI_VCC(curr)->next;
661 ENI_VCC(curr)->next = ENI_VCC_NOS;
662 barrier();
663 ENI_VCC(curr)->servicing--;
664 }
665 while ((curr = eni_dev->slow)) {
666 EVENT("poll_rx.slow\n",0,0);
667 if (rx_vcc(curr)) return;
668 eni_dev->slow = ENI_VCC(curr)->next;
669 ENI_VCC(curr)->next = ENI_VCC_NOS;
670 barrier();
671 ENI_VCC(curr)->servicing--;
672 }
673 }
674
675
676 static void get_service(struct atm_dev *dev)
677 {
678 struct eni_dev *eni_dev;
679 struct atm_vcc *vcc;
680 unsigned long vci;
681
682 DPRINTK(">get_service\n");
683 eni_dev = ENI_DEV(dev);
684 while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) {
685 vci = readl(eni_dev->service+eni_dev->serv_read*4);
686 eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1);
687 vcc = eni_dev->rx_map[vci & 1023];
688 if (!vcc) {
689 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not "
690 "found\n",dev->number,vci);
691 continue; /* nasty but we try to go on anyway */
692 /* @@@ nope, doesn't work */
693 }
694 EVENT("getting from service\n",0,0);
695 if (ENI_VCC(vcc)->next != ENI_VCC_NOS) {
696 EVENT("double service\n",0,0);
697 DPRINTK("Grr, servicing VCC %ld twice\n",vci);
698 continue;
699 }
700 ENI_VCC(vcc)->timestamp = ktime_get_real();
701 ENI_VCC(vcc)->next = NULL;
702 if (vcc->qos.rxtp.traffic_class == ATM_CBR) {
703 if (eni_dev->fast)
704 ENI_VCC(eni_dev->last_fast)->next = vcc;
705 else eni_dev->fast = vcc;
706 eni_dev->last_fast = vcc;
707 }
708 else {
709 if (eni_dev->slow)
710 ENI_VCC(eni_dev->last_slow)->next = vcc;
711 else eni_dev->slow = vcc;
712 eni_dev->last_slow = vcc;
713 }
714 putting++;
715 ENI_VCC(vcc)->servicing++;
716 }
717 }
718
719
720 static void dequeue_rx(struct atm_dev *dev)
721 {
722 struct eni_dev *eni_dev;
723 struct eni_vcc *eni_vcc;
724 struct atm_vcc *vcc;
725 struct sk_buff *skb;
726 void __iomem *vci_dsc;
727 int first;
728
729 eni_dev = ENI_DEV(dev);
730 first = 1;
731 while (1) {
732 skb = skb_dequeue(&eni_dev->rx_queue);
733 if (!skb) {
734 if (first) {
735 DPRINTK(DEV_LABEL "(itf %d): RX but not "
736 "rxing\n",dev->number);
737 EVENT("nothing to dequeue\n",0,0);
738 }
739 break;
740 }
741 EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb),
742 ENI_PRV_POS(skb));
743 rx_dequeued++;
744 vcc = ATM_SKB(skb)->vcc;
745 eni_vcc = ENI_VCC(vcc);
746 first = 0;
747 vci_dsc = eni_dev->vci+vcc->vci*16;
748 if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb),
749 (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT,
750 eni_vcc->words)) {
751 EVENT("requeuing\n",0,0);
752 skb_queue_head(&eni_dev->rx_queue,skb);
753 break;
754 }
755 eni_vcc->rxing--;
756 eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1);
757 dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len,
758 DMA_TO_DEVICE);
759 if (!skb->len) dev_kfree_skb_irq(skb);
760 else {
761 EVENT("pushing (len=%ld)\n",skb->len,0);
762 if (vcc->qos.aal == ATM_AAL0)
763 *(unsigned long *) skb->data =
764 ntohl(*(unsigned long *) skb->data);
765 memset(skb->cb,0,sizeof(struct eni_skb_prv));
766 vcc->push(vcc,skb);
767 pushed++;
768 }
769 atomic_inc(&vcc->stats->rx);
770 }
771 wake_up(&eni_dev->rx_wait);
772 }
773
774
775 static int open_rx_first(struct atm_vcc *vcc)
776 {
777 struct eni_dev *eni_dev;
778 struct eni_vcc *eni_vcc;
779 unsigned long size;
780
781 DPRINTK("open_rx_first\n");
782 eni_dev = ENI_DEV(vcc->dev);
783 eni_vcc = ENI_VCC(vcc);
784 eni_vcc->rx = NULL;
785 if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0;
786 size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100;
787 if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <=
788 MID_MAX_BUF_SIZE)
789 size = MID_MAX_BUF_SIZE;
790 eni_vcc->recv = eni_alloc_mem(eni_dev,&size);
791 DPRINTK("rx at 0x%lx\n",eni_vcc->recv);
792 eni_vcc->words = size >> 2;
793 if (!eni_vcc->recv) return -ENOBUFS;
794 eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0;
795 eni_vcc->descr = 0;
796 eni_vcc->rx_pos = 0;
797 eni_vcc->rxing = 0;
798 eni_vcc->servicing = 0;
799 eni_vcc->next = ENI_VCC_NOS;
800 return 0;
801 }
802
803
804 static int open_rx_second(struct atm_vcc *vcc)
805 {
806 void __iomem *here;
807 struct eni_dev *eni_dev;
808 struct eni_vcc *eni_vcc;
809 unsigned long size;
810 int order;
811
812 DPRINTK("open_rx_second\n");
813 eni_dev = ENI_DEV(vcc->dev);
814 eni_vcc = ENI_VCC(vcc);
815 if (!eni_vcc->rx) return 0;
816 /* set up VCI descriptor */
817 here = eni_dev->vci+vcc->vci*16;
818 DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4);
819 size = eni_vcc->words >> 8;
820 for (order = -1; size; order++) size >>= 1;
821 writel(0,here+4); /* descr, read = 0 */
822 writel(0,here+8); /* write, state, count = 0 */
823 if (eni_dev->rx_map[vcc->vci])
824 printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already "
825 "in use\n",vcc->dev->number,vcc->vci);
826 eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */
827 writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) <<
828 MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE |
829 (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) <<
830 MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here);
831 return 0;
832 }
833
834
835 static void close_rx(struct atm_vcc *vcc)
836 {
837 DECLARE_WAITQUEUE(wait,current);
838 void __iomem *here;
839 struct eni_dev *eni_dev;
840 struct eni_vcc *eni_vcc;
841
842 eni_vcc = ENI_VCC(vcc);
843 if (!eni_vcc->rx) return;
844 eni_dev = ENI_DEV(vcc->dev);
845 if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) {
846 here = eni_dev->vci+vcc->vci*16;
847 /* block receiver */
848 writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH <<
849 MID_VCI_MODE_SHIFT),here);
850 /* wait for receiver to become idle */
851 udelay(27);
852 /* discard pending cell */
853 writel(readl(here) & ~MID_VCI_IN_SERVICE,here);
854 /* don't accept any new ones */
855 eni_dev->rx_map[vcc->vci] = NULL;
856 /* wait for RX queue to drain */
857 DPRINTK("eni_close: waiting for RX ...\n");
858 EVENT("RX closing\n",0,0);
859 add_wait_queue(&eni_dev->rx_wait,&wait);
860 set_current_state(TASK_UNINTERRUPTIBLE);
861 barrier();
862 for (;;) {
863 /* transition service->rx: rxing++, servicing-- */
864 if (!eni_vcc->servicing) {
865 barrier();
866 if (!eni_vcc->rxing) break;
867 }
868 EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing,
869 eni_vcc->servicing);
870 printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing,
871 eni_vcc->rxing);
872 schedule();
873 set_current_state(TASK_UNINTERRUPTIBLE);
874 }
875 for (;;) {
876 int at_end;
877 u32 tmp;
878
879 tasklet_disable(&eni_dev->task);
880 tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ;
881 at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT;
882 tasklet_enable(&eni_dev->task);
883 if (at_end) break;
884 EVENT("drain discard (host 0x%lx, nic 0x%lx)\n",
885 eni_vcc->rx_pos,tmp);
886 printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n",
887 eni_vcc->rx_pos,tmp);
888 schedule();
889 set_current_state(TASK_UNINTERRUPTIBLE);
890 }
891 set_current_state(TASK_RUNNING);
892 remove_wait_queue(&eni_dev->rx_wait,&wait);
893 }
894 eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2);
895 eni_vcc->rx = NULL;
896 }
897
898
899 static int start_rx(struct atm_dev *dev)
900 {
901 struct eni_dev *eni_dev;
902
903 eni_dev = ENI_DEV(dev);
904 eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL);
905 if (!eni_dev->rx_map) {
906 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
907 dev->number);
908 free_page((unsigned long) eni_dev->free_list);
909 return -ENOMEM;
910 }
911 eni_dev->rx_mult = DEFAULT_RX_MULT;
912 eni_dev->fast = eni_dev->last_fast = NULL;
913 eni_dev->slow = eni_dev->last_slow = NULL;
914 init_waitqueue_head(&eni_dev->rx_wait);
915 skb_queue_head_init(&eni_dev->rx_queue);
916 eni_dev->serv_read = eni_in(MID_SERV_WRITE);
917 eni_out(0,MID_DMA_WR_RX);
918 return 0;
919 }
920
921
922 /*----------------------------------- TX ------------------------------------*/
923
924
925 enum enq_res { enq_ok,enq_next,enq_jam };
926
927
928 static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr,
929 u32 size)
930 {
931 u32 init,words;
932
933 DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size);
934 EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size);
935 #if 0 /* don't complain anymore */
936 if (paddr & 3)
937 printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr);
938 if (size & 3)
939 printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size);
940 #endif
941 if (paddr & 3) {
942 init = 4-(paddr & 3);
943 if (init > size || size < 7) init = size;
944 DPRINTK("put_dma: %lx DMA: %d/%d bytes\n",
945 (unsigned long) paddr,init,size);
946 dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) |
947 (chan << MID_DMA_CHAN_SHIFT);
948 dma[(*j)++] = paddr;
949 paddr += init;
950 size -= init;
951 }
952 words = size >> 2;
953 size &= 3;
954 if (words && (paddr & 31)) {
955 init = 8-((paddr & 31) >> 2);
956 if (init > words) init = words;
957 DPRINTK("put_dma: %lx DMA: %d/%d words\n",
958 (unsigned long) paddr,init,words);
959 dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
960 (chan << MID_DMA_CHAN_SHIFT);
961 dma[(*j)++] = paddr;
962 paddr += init << 2;
963 words -= init;
964 }
965 #ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */
966 if (words & ~15) {
967 DPRINTK("put_dma: %lx DMA: %d*16/%d words\n",
968 (unsigned long) paddr,words >> 4,words);
969 dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT)
970 | (chan << MID_DMA_CHAN_SHIFT);
971 dma[(*j)++] = paddr;
972 paddr += (words & ~15) << 2;
973 words &= 15;
974 }
975 #endif
976 #ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */
977 if (words & ~7) {
978 DPRINTK("put_dma: %lx DMA: %d*8/%d words\n",
979 (unsigned long) paddr,words >> 3,words);
980 dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT)
981 | (chan << MID_DMA_CHAN_SHIFT);
982 dma[(*j)++] = paddr;
983 paddr += (words & ~7) << 2;
984 words &= 7;
985 }
986 #endif
987 #ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */
988 if (words & ~3) {
989 DPRINTK("put_dma: %lx DMA: %d*4/%d words\n",
990 (unsigned long) paddr,words >> 2,words);
991 dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT)
992 | (chan << MID_DMA_CHAN_SHIFT);
993 dma[(*j)++] = paddr;
994 paddr += (words & ~3) << 2;
995 words &= 3;
996 }
997 #endif
998 #ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */
999 if (words & ~1) {
1000 DPRINTK("put_dma: %lx DMA: %d*2/%d words\n",
1001 (unsigned long) paddr,words >> 1,words);
1002 dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT)
1003 | (chan << MID_DMA_CHAN_SHIFT);
1004 dma[(*j)++] = paddr;
1005 paddr += (words & ~1) << 2;
1006 words &= 1;
1007 }
1008 #endif
1009 if (words) {
1010 DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr,
1011 words);
1012 dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) |
1013 (chan << MID_DMA_CHAN_SHIFT);
1014 dma[(*j)++] = paddr;
1015 paddr += words << 2;
1016 }
1017 if (size) {
1018 DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr,
1019 size);
1020 dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) |
1021 (chan << MID_DMA_CHAN_SHIFT);
1022 dma[(*j)++] = paddr;
1023 }
1024 }
1025
1026
1027 static enum enq_res do_tx(struct sk_buff *skb)
1028 {
1029 struct atm_vcc *vcc;
1030 struct eni_dev *eni_dev;
1031 struct eni_vcc *eni_vcc;
1032 struct eni_tx *tx;
1033 dma_addr_t paddr;
1034 u32 dma_rd,dma_wr;
1035 u32 size; /* in words */
1036 int aal5,dma_size,i,j;
1037
1038 DPRINTK(">do_tx\n");
1039 NULLCHECK(skb);
1040 EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len);
1041 vcc = ATM_SKB(skb)->vcc;
1042 NULLCHECK(vcc);
1043 eni_dev = ENI_DEV(vcc->dev);
1044 NULLCHECK(eni_dev);
1045 eni_vcc = ENI_VCC(vcc);
1046 tx = eni_vcc->tx;
1047 NULLCHECK(tx);
1048 #if 0 /* Enable this for testing with the "align" program */
1049 {
1050 unsigned int hack = *((char *) skb->data)-'0';
1051
1052 if (hack < 8) {
1053 skb->data += hack;
1054 skb->len -= hack;
1055 }
1056 }
1057 #endif
1058 #if 0 /* should work now */
1059 if ((unsigned long) skb->data & 3)
1060 printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned "
1061 "TX data\n",vcc->dev->number,vcc->vci);
1062 #endif
1063 /*
1064 * Potential future IP speedup: make hard_header big enough to put
1065 * segmentation descriptor directly into PDU. Saves: 4 slave writes,
1066 * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-)
1067 */
1068
1069 aal5 = vcc->qos.aal == ATM_AAL5;
1070 /* check space in buffer */
1071 if (!aal5)
1072 size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE;
1073 /* cell without HEC plus segmentation header (includes
1074 four-byte cell header) */
1075 else {
1076 size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1;
1077 /* add AAL5 trailer */
1078 size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE;
1079 /* add segmentation header */
1080 }
1081 /*
1082 * Can I move tx_pos by size bytes without getting closer than TX_GAP
1083 * to the read pointer ? TX_GAP means to leave some space for what
1084 * the manual calls "too close".
1085 */
1086 if (!NEPMOK(tx->tx_pos,size+TX_GAP,
1087 eni_in(MID_TX_RDPTR(tx->index)),tx->words)) {
1088 DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n",
1089 vcc->dev->number,size);
1090 return enq_next;
1091 }
1092 /* check DMA */
1093 dma_wr = eni_in(MID_DMA_WR_TX);
1094 dma_rd = eni_in(MID_DMA_RD_TX);
1095 dma_size = 3; /* JK for descriptor and final fill, plus final size
1096 mis-alignment fix */
1097 DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags);
1098 if (!skb_shinfo(skb)->nr_frags) dma_size += 5;
1099 else dma_size += 5*(skb_shinfo(skb)->nr_frags+1);
1100 if (dma_size > TX_DMA_BUF) {
1101 printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries "
1102 "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF);
1103 }
1104 DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos);
1105 if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) <
1106 dma_size) {
1107 printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n",
1108 vcc->dev->number);
1109 return enq_jam;
1110 }
1111 paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len,
1112 DMA_TO_DEVICE);
1113 ENI_PRV_PADDR(skb) = paddr;
1114 /* prepare DMA queue entries */
1115 j = 0;
1116 eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) <<
1117 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1118 MID_DT_JK;
1119 j++;
1120 if (!skb_shinfo(skb)->nr_frags)
1121 if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len);
1122 else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4);
1123 else {
1124 DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */
1125 for (i = -1; i < skb_shinfo(skb)->nr_frags; i++)
1126 if (i == -1)
1127 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1128 skb->data,
1129 skb_headlen(skb));
1130 else
1131 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1132 skb_frag_page(&skb_shinfo(skb)->frags[i]) +
1133 skb_frag_off(&skb_shinfo(skb)->frags[i]),
1134 skb_frag_size(&skb_shinfo(skb)->frags[i]));
1135 }
1136 if (skb->len & 3) {
1137 put_dma(tx->index, eni_dev->dma, &j, eni_dev->zero.dma,
1138 4 - (skb->len & 3));
1139 }
1140 /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */
1141 eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) <<
1142 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1143 MID_DMA_END | MID_DT_JK;
1144 j++;
1145 DPRINTK("DMA at end: %d\n",j);
1146 /* store frame */
1147 writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) |
1148 (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) |
1149 (tx->resolution << MID_SEG_RATE_SHIFT) |
1150 (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4);
1151 /*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/
1152 writel((vcc->vci << MID_SEG_VCI_SHIFT) |
1153 (aal5 ? 0 : (skb->data[3] & 0xf)) |
1154 (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0),
1155 tx->send+((tx->tx_pos+1) & (tx->words-1))*4);
1156 DPRINTK("size: %d, len:%d\n",size,skb->len);
1157 if (aal5)
1158 writel(skb->len,tx->send+
1159 ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4);
1160 j = j >> 1;
1161 for (i = 0; i < j; i++) {
1162 writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8);
1163 writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4);
1164 dma_wr = (dma_wr+1) & (NR_DMA_TX-1);
1165 }
1166 ENI_PRV_POS(skb) = tx->tx_pos;
1167 ENI_PRV_SIZE(skb) = size;
1168 ENI_VCC(vcc)->txing += size;
1169 tx->tx_pos = (tx->tx_pos+size) & (tx->words-1);
1170 DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos);
1171 eni_out(dma_wr,MID_DMA_WR_TX);
1172 skb_queue_tail(&eni_dev->tx_queue,skb);
1173 queued++;
1174 return enq_ok;
1175 }
1176
1177
1178 static void poll_tx(struct atm_dev *dev)
1179 {
1180 struct eni_tx *tx;
1181 struct sk_buff *skb;
1182 enum enq_res res;
1183 int i;
1184
1185 DPRINTK(">poll_tx\n");
1186 for (i = NR_CHAN-1; i >= 0; i--) {
1187 tx = &ENI_DEV(dev)->tx[i];
1188 if (tx->send)
1189 while ((skb = skb_dequeue(&tx->backlog))) {
1190 res = do_tx(skb);
1191 if (res == enq_ok) continue;
1192 DPRINTK("re-queuing TX PDU\n");
1193 skb_queue_head(&tx->backlog,skb);
1194 requeued++;
1195 if (res == enq_jam) return;
1196 break;
1197 }
1198 }
1199 }
1200
1201
1202 static void dequeue_tx(struct atm_dev *dev)
1203 {
1204 struct eni_dev *eni_dev;
1205 struct atm_vcc *vcc;
1206 struct sk_buff *skb;
1207 struct eni_tx *tx;
1208
1209 NULLCHECK(dev);
1210 eni_dev = ENI_DEV(dev);
1211 NULLCHECK(eni_dev);
1212 while ((skb = skb_dequeue(&eni_dev->tx_queue))) {
1213 vcc = ATM_SKB(skb)->vcc;
1214 NULLCHECK(vcc);
1215 tx = ENI_VCC(vcc)->tx;
1216 NULLCHECK(ENI_VCC(vcc)->tx);
1217 DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb),
1218 (unsigned) eni_in(MID_TX_DESCRSTART(tx->index)));
1219 if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) ==
1220 eni_in(MID_TX_DESCRSTART(tx->index))) {
1221 skb_queue_head(&eni_dev->tx_queue,skb);
1222 break;
1223 }
1224 ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb);
1225 dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len,
1226 DMA_TO_DEVICE);
1227 if (vcc->pop) vcc->pop(vcc,skb);
1228 else dev_kfree_skb_irq(skb);
1229 atomic_inc(&vcc->stats->tx);
1230 wake_up(&eni_dev->tx_wait);
1231 dma_complete++;
1232 }
1233 }
1234
1235
1236 static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr)
1237 {
1238 int i;
1239
1240 for (i = !ubr; i < NR_CHAN; i++)
1241 if (!eni_dev->tx[i].send) return eni_dev->tx+i;
1242 return NULL;
1243 }
1244
1245
1246 static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre,
1247 int *res,int unlimited)
1248 {
1249 static const int pre_div[] = { 4,16,128,2048 };
1250 /* 2^(((x+2)^2-(x+2))/2+1) */
1251
1252 if (unlimited) *pre = *res = 0;
1253 else {
1254 if (*pcr > 0) {
1255 int div;
1256
1257 for (*pre = 0; *pre < 3; (*pre)++)
1258 if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break;
1259 div = pre_div[*pre]**pcr;
1260 DPRINTK("min div %d\n",div);
1261 *res = TS_CLOCK/div-1;
1262 }
1263 else {
1264 int div;
1265
1266 if (!*pcr) *pcr = eni_dev->tx_bw+reserved;
1267 for (*pre = 3; *pre >= 0; (*pre)--)
1268 if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break;
1269 if (*pre < 3) (*pre)++; /* else fail later */
1270 div = pre_div[*pre]*-*pcr;
1271 DPRINTK("max div %d\n",div);
1272 *res = DIV_ROUND_UP(TS_CLOCK, div)-1;
1273 }
1274 if (*res < 0) *res = 0;
1275 if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE;
1276 }
1277 *pcr = TS_CLOCK/pre_div[*pre]/(*res+1);
1278 DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res);
1279 return 0;
1280 }
1281
1282
1283 static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp,
1284 int set_rsv,int set_shp)
1285 {
1286 struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1287 struct eni_vcc *eni_vcc = ENI_VCC(vcc);
1288 struct eni_tx *tx;
1289 unsigned long size;
1290 void __iomem *mem;
1291 int rate,ubr,unlimited,new_tx;
1292 int pre,res,order;
1293 int error;
1294
1295 rate = atm_pcr_goal(txtp);
1296 ubr = txtp->traffic_class == ATM_UBR;
1297 unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR ||
1298 rate >= ATM_OC3_PCR);
1299 if (!unlimited) {
1300 size = txtp->max_sdu*eni_dev->tx_mult/100;
1301 if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <=
1302 MID_MAX_BUF_SIZE)
1303 size = MID_MAX_BUF_SIZE;
1304 }
1305 else {
1306 if (eni_dev->ubr) {
1307 eni_vcc->tx = eni_dev->ubr;
1308 txtp->pcr = ATM_OC3_PCR;
1309 return 0;
1310 }
1311 size = UBR_BUFFER;
1312 }
1313 new_tx = !eni_vcc->tx;
1314 mem = NULL; /* for gcc */
1315 if (!new_tx) tx = eni_vcc->tx;
1316 else {
1317 mem = eni_alloc_mem(eni_dev,&size);
1318 if (!mem) return -ENOBUFS;
1319 tx = alloc_tx(eni_dev,unlimited);
1320 if (!tx) {
1321 eni_free_mem(eni_dev,mem,size);
1322 return -EBUSY;
1323 }
1324 DPRINTK("got chan %d\n",tx->index);
1325 tx->reserved = tx->shaping = 0;
1326 tx->send = mem;
1327 tx->words = size >> 2;
1328 skb_queue_head_init(&tx->backlog);
1329 for (order = 0; size > (1 << (order+10)); order++);
1330 eni_out((order << MID_SIZE_SHIFT) |
1331 ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)),
1332 MID_TX_PLACE(tx->index));
1333 tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) &
1334 MID_DESCR_START;
1335 }
1336 error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited);
1337 if (!error && txtp->min_pcr > rate) error = -EINVAL;
1338 if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR &&
1339 txtp->max_pcr < rate) error = -EINVAL;
1340 if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved)
1341 error = -EINVAL;
1342 if (!error && set_rsv && !set_shp && rate < tx->shaping)
1343 error = -EINVAL;
1344 if (!error && !set_rsv && rate > tx->reserved && !ubr)
1345 error = -EINVAL;
1346 if (error) {
1347 if (new_tx) {
1348 tx->send = NULL;
1349 eni_free_mem(eni_dev,mem,size);
1350 }
1351 return error;
1352 }
1353 txtp->pcr = rate;
1354 if (set_rsv && !ubr) {
1355 eni_dev->tx_bw += tx->reserved;
1356 tx->reserved = rate;
1357 eni_dev->tx_bw -= rate;
1358 }
1359 if (set_shp || (unlimited && new_tx)) {
1360 if (unlimited && new_tx) eni_dev->ubr = tx;
1361 tx->prescaler = pre;
1362 tx->resolution = res;
1363 tx->shaping = rate;
1364 }
1365 if (set_shp) eni_vcc->tx = tx;
1366 DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping);
1367 return 0;
1368 }
1369
1370
1371 static int open_tx_first(struct atm_vcc *vcc)
1372 {
1373 ENI_VCC(vcc)->tx = NULL;
1374 if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0;
1375 ENI_VCC(vcc)->txing = 0;
1376 return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1);
1377 }
1378
1379
1380 static int open_tx_second(struct atm_vcc *vcc)
1381 {
1382 return 0; /* nothing to do */
1383 }
1384
1385
1386 static void close_tx(struct atm_vcc *vcc)
1387 {
1388 DECLARE_WAITQUEUE(wait,current);
1389 struct eni_dev *eni_dev;
1390 struct eni_vcc *eni_vcc;
1391
1392 eni_vcc = ENI_VCC(vcc);
1393 if (!eni_vcc->tx) return;
1394 eni_dev = ENI_DEV(vcc->dev);
1395 /* wait for TX queue to drain */
1396 DPRINTK("eni_close: waiting for TX ...\n");
1397 add_wait_queue(&eni_dev->tx_wait,&wait);
1398 set_current_state(TASK_UNINTERRUPTIBLE);
1399 for (;;) {
1400 int txing;
1401
1402 tasklet_disable(&eni_dev->task);
1403 txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing;
1404 tasklet_enable(&eni_dev->task);
1405 if (!txing) break;
1406 DPRINTK("%d TX left\n",eni_vcc->txing);
1407 schedule();
1408 set_current_state(TASK_UNINTERRUPTIBLE);
1409 }
1410 set_current_state(TASK_RUNNING);
1411 remove_wait_queue(&eni_dev->tx_wait,&wait);
1412 if (eni_vcc->tx != eni_dev->ubr) {
1413 /*
1414 * Looping a few times in here is probably far cheaper than
1415 * keeping track of TX completions all the time, so let's poll
1416 * a bit ...
1417 */
1418 while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) !=
1419 eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index)))
1420 schedule();
1421 eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2);
1422 eni_vcc->tx->send = NULL;
1423 eni_dev->tx_bw += eni_vcc->tx->reserved;
1424 }
1425 eni_vcc->tx = NULL;
1426 }
1427
1428
1429 static int start_tx(struct atm_dev *dev)
1430 {
1431 struct eni_dev *eni_dev;
1432 int i;
1433
1434 eni_dev = ENI_DEV(dev);
1435 eni_dev->lost = 0;
1436 eni_dev->tx_bw = ATM_OC3_PCR;
1437 eni_dev->tx_mult = DEFAULT_TX_MULT;
1438 init_waitqueue_head(&eni_dev->tx_wait);
1439 eni_dev->ubr = NULL;
1440 skb_queue_head_init(&eni_dev->tx_queue);
1441 eni_out(0,MID_DMA_WR_TX);
1442 for (i = 0; i < NR_CHAN; i++) {
1443 eni_dev->tx[i].send = NULL;
1444 eni_dev->tx[i].index = i;
1445 }
1446 return 0;
1447 }
1448
1449
1450 /*--------------------------------- common ----------------------------------*/
1451
1452
1453 #if 0 /* may become useful again when tuning things */
1454
1455 static void foo(void)
1456 {
1457 printk(KERN_INFO
1458 "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n"
1459 "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n",
1460 tx_complete,dma_complete,queued,requeued,submitted,backlogged,
1461 rx_enqueued,rx_dequeued,putting,pushed);
1462 if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost);
1463 }
1464
1465 #endif
1466
1467
1468 static void bug_int(struct atm_dev *dev,unsigned long reason)
1469 {
1470 DPRINTK(">bug_int\n");
1471 if (reason & MID_DMA_ERR_ACK)
1472 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1473 "error\n",dev->number);
1474 if (reason & MID_TX_IDENT_MISM)
1475 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident "
1476 "mismatch\n",dev->number);
1477 if (reason & MID_TX_DMA_OVFL)
1478 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1479 "overflow\n",dev->number);
1480 EVENT("---dump ends here---\n",0,0);
1481 printk(KERN_NOTICE "---recent events---\n");
1482 event_dump();
1483 }
1484
1485
1486 static irqreturn_t eni_int(int irq,void *dev_id)
1487 {
1488 struct atm_dev *dev;
1489 struct eni_dev *eni_dev;
1490 u32 reason;
1491
1492 DPRINTK(">eni_int\n");
1493 dev = dev_id;
1494 eni_dev = ENI_DEV(dev);
1495 reason = eni_in(MID_ISA);
1496 DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason);
1497 /*
1498 * Must handle these two right now, because reading ISA doesn't clear
1499 * them, so they re-occur and we never make it to the tasklet. Since
1500 * they're rare, we don't mind the occasional invocation of eni_tasklet
1501 * with eni_dev->events == 0.
1502 */
1503 if (reason & MID_STAT_OVFL) {
1504 EVENT("stat overflow\n",0,0);
1505 eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH;
1506 }
1507 if (reason & MID_SUNI_INT) {
1508 EVENT("SUNI int\n",0,0);
1509 dev->phy->interrupt(dev);
1510 #if 0
1511 foo();
1512 #endif
1513 }
1514 spin_lock(&eni_dev->lock);
1515 eni_dev->events |= reason;
1516 spin_unlock(&eni_dev->lock);
1517 tasklet_schedule(&eni_dev->task);
1518 return IRQ_HANDLED;
1519 }
1520
1521
1522 static void eni_tasklet(unsigned long data)
1523 {
1524 struct atm_dev *dev = (struct atm_dev *) data;
1525 struct eni_dev *eni_dev = ENI_DEV(dev);
1526 unsigned long flags;
1527 u32 events;
1528
1529 DPRINTK("eni_tasklet (dev %p)\n",dev);
1530 spin_lock_irqsave(&eni_dev->lock,flags);
1531 events = xchg(&eni_dev->events,0);
1532 spin_unlock_irqrestore(&eni_dev->lock,flags);
1533 if (events & MID_RX_DMA_COMPLETE) {
1534 EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0);
1535 dequeue_rx(dev);
1536 EVENT("dequeue_rx done, starting poll_rx\n",0,0);
1537 poll_rx(dev);
1538 EVENT("poll_rx done\n",0,0);
1539 /* poll_tx ? */
1540 }
1541 if (events & MID_SERVICE) {
1542 EVENT("INT: service, starting get_service\n",0,0);
1543 get_service(dev);
1544 EVENT("get_service done, starting poll_rx\n",0,0);
1545 poll_rx(dev);
1546 EVENT("poll_rx done\n",0,0);
1547 }
1548 if (events & MID_TX_DMA_COMPLETE) {
1549 EVENT("INT: TX DMA COMPLETE\n",0,0);
1550 dequeue_tx(dev);
1551 }
1552 if (events & MID_TX_COMPLETE) {
1553 EVENT("INT: TX COMPLETE\n",0,0);
1554 tx_complete++;
1555 wake_up(&eni_dev->tx_wait);
1556 /* poll_rx ? */
1557 }
1558 if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) {
1559 EVENT("bug interrupt\n",0,0);
1560 bug_int(dev,events);
1561 }
1562 poll_tx(dev);
1563 }
1564
1565
1566 /*--------------------------------- entries ---------------------------------*/
1567
1568
1569 static char * const media_name[] = {
1570 "MMF", "SMF", "MMF", "03?", /* 0- 3 */
1571 "UTP", "05?", "06?", "07?", /* 4- 7 */
1572 "TAXI","09?", "10?", "11?", /* 8-11 */
1573 "12?", "13?", "14?", "15?", /* 12-15 */
1574 "MMF", "SMF", "18?", "19?", /* 16-19 */
1575 "UTP", "21?", "22?", "23?", /* 20-23 */
1576 "24?", "25?", "26?", "27?", /* 24-27 */
1577 "28?", "29?", "30?", "31?" /* 28-31 */
1578 };
1579
1580
1581 #define SET_SEPROM \
1582 ({ if (!error && !pci_error) { \
1583 pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \
1584 udelay(10); /* 10 usecs */ \
1585 } })
1586 #define GET_SEPROM \
1587 ({ if (!error && !pci_error) { \
1588 pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \
1589 udelay(10); /* 10 usecs */ \
1590 } })
1591
1592
1593 static int get_esi_asic(struct atm_dev *dev)
1594 {
1595 struct eni_dev *eni_dev;
1596 unsigned char tonga;
1597 int error,failed,pci_error;
1598 int address,i,j;
1599
1600 eni_dev = ENI_DEV(dev);
1601 error = pci_error = 0;
1602 tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK;
1603 SET_SEPROM;
1604 for (i = 0; i < ESI_LEN && !error && !pci_error; i++) {
1605 /* start operation */
1606 tonga |= SEPROM_DATA;
1607 SET_SEPROM;
1608 tonga |= SEPROM_CLK;
1609 SET_SEPROM;
1610 tonga &= ~SEPROM_DATA;
1611 SET_SEPROM;
1612 tonga &= ~SEPROM_CLK;
1613 SET_SEPROM;
1614 /* send address */
1615 address = ((i+SEPROM_ESI_BASE) << 1)+1;
1616 for (j = 7; j >= 0; j--) {
1617 tonga = (address >> j) & 1 ? tonga | SEPROM_DATA :
1618 tonga & ~SEPROM_DATA;
1619 SET_SEPROM;
1620 tonga |= SEPROM_CLK;
1621 SET_SEPROM;
1622 tonga &= ~SEPROM_CLK;
1623 SET_SEPROM;
1624 }
1625 /* get ack */
1626 tonga |= SEPROM_DATA;
1627 SET_SEPROM;
1628 tonga |= SEPROM_CLK;
1629 SET_SEPROM;
1630 GET_SEPROM;
1631 failed = tonga & SEPROM_DATA;
1632 tonga &= ~SEPROM_CLK;
1633 SET_SEPROM;
1634 tonga |= SEPROM_DATA;
1635 SET_SEPROM;
1636 if (failed) error = -EIO;
1637 else {
1638 dev->esi[i] = 0;
1639 for (j = 7; j >= 0; j--) {
1640 dev->esi[i] <<= 1;
1641 tonga |= SEPROM_DATA;
1642 SET_SEPROM;
1643 tonga |= SEPROM_CLK;
1644 SET_SEPROM;
1645 GET_SEPROM;
1646 if (tonga & SEPROM_DATA) dev->esi[i] |= 1;
1647 tonga &= ~SEPROM_CLK;
1648 SET_SEPROM;
1649 tonga |= SEPROM_DATA;
1650 SET_SEPROM;
1651 }
1652 /* get ack */
1653 tonga |= SEPROM_DATA;
1654 SET_SEPROM;
1655 tonga |= SEPROM_CLK;
1656 SET_SEPROM;
1657 GET_SEPROM;
1658 if (!(tonga & SEPROM_DATA)) error = -EIO;
1659 tonga &= ~SEPROM_CLK;
1660 SET_SEPROM;
1661 tonga |= SEPROM_DATA;
1662 SET_SEPROM;
1663 }
1664 /* stop operation */
1665 tonga &= ~SEPROM_DATA;
1666 SET_SEPROM;
1667 tonga |= SEPROM_CLK;
1668 SET_SEPROM;
1669 tonga |= SEPROM_DATA;
1670 SET_SEPROM;
1671 }
1672 if (pci_error) {
1673 printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI "
1674 "(0x%02x)\n",dev->number,pci_error);
1675 error = -EIO;
1676 }
1677 return error;
1678 }
1679
1680
1681 #undef SET_SEPROM
1682 #undef GET_SEPROM
1683
1684
1685 static int get_esi_fpga(struct atm_dev *dev, void __iomem *base)
1686 {
1687 void __iomem *mac_base;
1688 int i;
1689
1690 mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom);
1691 for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3));
1692 return 0;
1693 }
1694
1695
1696 static int eni_do_init(struct atm_dev *dev)
1697 {
1698 struct midway_eprom __iomem *eprom;
1699 struct eni_dev *eni_dev;
1700 struct pci_dev *pci_dev;
1701 unsigned long real_base;
1702 void __iomem *base;
1703 int error,i,last;
1704
1705 DPRINTK(">eni_init\n");
1706 dev->ci_range.vpi_bits = 0;
1707 dev->ci_range.vci_bits = NR_VCI_LD;
1708 dev->link_rate = ATM_OC3_PCR;
1709 eni_dev = ENI_DEV(dev);
1710 pci_dev = eni_dev->pci_dev;
1711 real_base = pci_resource_start(pci_dev, 0);
1712 eni_dev->irq = pci_dev->irq;
1713 if ((error = pci_write_config_word(pci_dev,PCI_COMMAND,
1714 PCI_COMMAND_MEMORY |
1715 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1716 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory "
1717 "(0x%02x)\n",dev->number,error);
1718 return -EIO;
1719 }
1720 printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,",
1721 dev->number,pci_dev->revision,real_base,eni_dev->irq);
1722 if (!(base = ioremap(real_base,MAP_MAX_SIZE))) {
1723 printk("\n");
1724 printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page "
1725 "mapping\n",dev->number);
1726 return -ENOMEM;
1727 }
1728 eni_dev->ioaddr = base;
1729 eni_dev->base_diff = real_base - (unsigned long) base;
1730 /* id may not be present in ASIC Tonga boards - check this @@@ */
1731 if (!eni_dev->asic) {
1732 eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom));
1733 if (readl(&eprom->magic) != ENI155_MAGIC) {
1734 printk("\n");
1735 printk(KERN_ERR DEV_LABEL
1736 "(itf %d): bad magic - expected 0x%x, got 0x%x\n",
1737 dev->number, ENI155_MAGIC,
1738 (unsigned)readl(&eprom->magic));
1739 error = -EINVAL;
1740 goto unmap;
1741 }
1742 }
1743 eni_dev->phy = base+PHY_BASE;
1744 eni_dev->reg = base+REG_BASE;
1745 eni_dev->ram = base+RAM_BASE;
1746 last = MAP_MAX_SIZE-RAM_BASE;
1747 for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) {
1748 writel(0x55555555,eni_dev->ram+i);
1749 if (readl(eni_dev->ram+i) != 0x55555555) last = i;
1750 else {
1751 writel(0xAAAAAAAA,eni_dev->ram+i);
1752 if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i;
1753 else writel(i,eni_dev->ram+i);
1754 }
1755 }
1756 for (i = 0; i < last; i += RAM_INCREMENT)
1757 if (readl(eni_dev->ram+i) != i) break;
1758 eni_dev->mem = i;
1759 memset_io(eni_dev->ram,0,eni_dev->mem);
1760 /* TODO: should shrink allocation now */
1761 printk("mem=%dkB (",eni_dev->mem >> 10);
1762 /* TODO: check for non-SUNI, check for TAXI ? */
1763 if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) {
1764 printk(")\n");
1765 printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n",
1766 dev->number,(unsigned) eni_in(MID_RES_ID_MCON));
1767 error = -EINVAL;
1768 goto unmap;
1769 }
1770 error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base);
1771 if (error)
1772 goto unmap;
1773 for (i = 0; i < ESI_LEN; i++)
1774 printk("%s%02X",i ? "-" : "",dev->esi[i]);
1775 printk(")\n");
1776 printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number,
1777 eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA",
1778 media_name[eni_in(MID_RES_ID_MCON) & DAUGHTER_ID]);
1779
1780 error = suni_init(dev);
1781 if (error)
1782 goto unmap;
1783 out:
1784 return error;
1785 unmap:
1786 iounmap(base);
1787 goto out;
1788 }
1789
1790 static void eni_do_release(struct atm_dev *dev)
1791 {
1792 struct eni_dev *ed = ENI_DEV(dev);
1793
1794 dev->phy->stop(dev);
1795 dev->phy = NULL;
1796 iounmap(ed->ioaddr);
1797 }
1798
1799 static int eni_start(struct atm_dev *dev)
1800 {
1801 struct eni_dev *eni_dev;
1802
1803 void __iomem *buf;
1804 unsigned long buffer_mem;
1805 int error;
1806
1807 DPRINTK(">eni_start\n");
1808 eni_dev = ENI_DEV(dev);
1809 if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) {
1810 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
1811 dev->number,eni_dev->irq);
1812 error = -EAGAIN;
1813 goto out;
1814 }
1815 pci_set_master(eni_dev->pci_dev);
1816 if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND,
1817 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
1818 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1819 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+"
1820 "master (0x%02x)\n",dev->number,error);
1821 goto free_irq;
1822 }
1823 if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,
1824 END_SWAP_DMA))) {
1825 printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap "
1826 "(0x%02x)\n",dev->number,error);
1827 goto free_irq;
1828 }
1829 /* determine addresses of internal tables */
1830 eni_dev->vci = eni_dev->ram;
1831 eni_dev->rx_dma = eni_dev->ram+NR_VCI*16;
1832 eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8;
1833 eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8;
1834 buf = eni_dev->service+NR_SERVICE*4;
1835 DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n",
1836 eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma,
1837 eni_dev->service,buf);
1838 spin_lock_init(&eni_dev->lock);
1839 tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev);
1840 eni_dev->events = 0;
1841 /* initialize memory management */
1842 buffer_mem = eni_dev->mem - (buf - eni_dev->ram);
1843 eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2;
1844 eni_dev->free_list = kmalloc_array(eni_dev->free_list_size + 1,
1845 sizeof(*eni_dev->free_list),
1846 GFP_KERNEL);
1847 if (!eni_dev->free_list) {
1848 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
1849 dev->number);
1850 error = -ENOMEM;
1851 goto free_irq;
1852 }
1853 eni_dev->free_len = 0;
1854 eni_put_free(eni_dev,buf,buffer_mem);
1855 memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */
1856 /*
1857 * byte_addr free (k)
1858 * 0x00000000 512 VCI table
1859 * 0x00004000 496 RX DMA
1860 * 0x00005000 492 TX DMA
1861 * 0x00006000 488 service list
1862 * 0x00007000 484 buffers
1863 * 0x00080000 0 end (512kB)
1864 */
1865 eni_out(0xffffffff,MID_IE);
1866 error = start_tx(dev);
1867 if (error) goto free_list;
1868 error = start_rx(dev);
1869 if (error) goto free_list;
1870 error = dev->phy->start(dev);
1871 if (error) goto free_list;
1872 eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) |
1873 MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE,
1874 MID_MC_S);
1875 /* Tonga uses SBus INTReq1 */
1876 (void) eni_in(MID_ISA); /* clear Midway interrupts */
1877 return 0;
1878
1879 free_list:
1880 kfree(eni_dev->free_list);
1881
1882 free_irq:
1883 free_irq(eni_dev->irq, dev);
1884
1885 out:
1886 return error;
1887 }
1888
1889
1890 static void eni_close(struct atm_vcc *vcc)
1891 {
1892 DPRINTK(">eni_close\n");
1893 if (!ENI_VCC(vcc)) return;
1894 clear_bit(ATM_VF_READY,&vcc->flags);
1895 close_rx(vcc);
1896 close_tx(vcc);
1897 DPRINTK("eni_close: done waiting\n");
1898 /* deallocate memory */
1899 kfree(ENI_VCC(vcc));
1900 vcc->dev_data = NULL;
1901 clear_bit(ATM_VF_ADDR,&vcc->flags);
1902 /*foo();*/
1903 }
1904
1905
1906 static int eni_open(struct atm_vcc *vcc)
1907 {
1908 struct eni_vcc *eni_vcc;
1909 int error;
1910 short vpi = vcc->vpi;
1911 int vci = vcc->vci;
1912
1913 DPRINTK(">eni_open\n");
1914 EVENT("eni_open\n",0,0);
1915 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1916 vcc->dev_data = NULL;
1917 if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
1918 set_bit(ATM_VF_ADDR,&vcc->flags);
1919 if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5)
1920 return -EINVAL;
1921 DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi,
1922 vcc->vci);
1923 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
1924 eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL);
1925 if (!eni_vcc) return -ENOMEM;
1926 vcc->dev_data = eni_vcc;
1927 eni_vcc->tx = NULL; /* for eni_close after open_rx */
1928 if ((error = open_rx_first(vcc))) {
1929 eni_close(vcc);
1930 return error;
1931 }
1932 if ((error = open_tx_first(vcc))) {
1933 eni_close(vcc);
1934 return error;
1935 }
1936 }
1937 if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0;
1938 if ((error = open_rx_second(vcc))) {
1939 eni_close(vcc);
1940 return error;
1941 }
1942 if ((error = open_tx_second(vcc))) {
1943 eni_close(vcc);
1944 return error;
1945 }
1946 set_bit(ATM_VF_READY,&vcc->flags);
1947 /* should power down SUNI while !ref_count @@@ */
1948 return 0;
1949 }
1950
1951
1952 static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs)
1953 {
1954 struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1955 struct eni_tx *tx = ENI_VCC(vcc)->tx;
1956 struct sk_buff *skb;
1957 int error,rate,rsv,shp;
1958
1959 if (qos->txtp.traffic_class == ATM_NONE) return 0;
1960 if (tx == eni_dev->ubr) return -EBADFD;
1961 rate = atm_pcr_goal(&qos->txtp);
1962 if (rate < 0) rate = -rate;
1963 rsv = shp = 0;
1964 if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1;
1965 if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1;
1966 if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1;
1967 if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1;
1968 if (!rsv && !shp) return 0;
1969 error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp);
1970 if (error) return error;
1971 if (shp && !(flgs & ATM_MF_IMMED)) return 0;
1972 /*
1973 * Walk through the send buffer and patch the rate information in all
1974 * segmentation buffer descriptors of this VCC.
1975 */
1976 tasklet_disable(&eni_dev->task);
1977 skb_queue_walk(&eni_dev->tx_queue, skb) {
1978 void __iomem *dsc;
1979
1980 if (ATM_SKB(skb)->vcc != vcc) continue;
1981 dsc = tx->send+ENI_PRV_POS(skb)*4;
1982 writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) |
1983 (tx->prescaler << MID_SEG_PR_SHIFT) |
1984 (tx->resolution << MID_SEG_RATE_SHIFT), dsc);
1985 }
1986 tasklet_enable(&eni_dev->task);
1987 return 0;
1988 }
1989
1990
1991 static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
1992 {
1993 struct eni_dev *eni_dev = ENI_DEV(dev);
1994
1995 if (cmd == ENI_MEMDUMP) {
1996 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1997 printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d "
1998 "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number);
1999 dump(dev);
2000 return 0;
2001 }
2002 if (cmd == ENI_SETMULT) {
2003 struct eni_multipliers mult;
2004
2005 if (!capable(CAP_NET_ADMIN)) return -EPERM;
2006 if (copy_from_user(&mult, arg,
2007 sizeof(struct eni_multipliers)))
2008 return -EFAULT;
2009 if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) ||
2010 mult.tx > 65536 || mult.rx > 65536)
2011 return -EINVAL;
2012 if (mult.tx) eni_dev->tx_mult = mult.tx;
2013 if (mult.rx) eni_dev->rx_mult = mult.rx;
2014 return 0;
2015 }
2016 if (cmd == ATM_SETCIRANGE) {
2017 struct atm_cirange ci;
2018
2019 if (copy_from_user(&ci, arg,sizeof(struct atm_cirange)))
2020 return -EFAULT;
2021 if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) &&
2022 (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX))
2023 return 0;
2024 return -EINVAL;
2025 }
2026 if (!dev->phy->ioctl) return -ENOIOCTLCMD;
2027 return dev->phy->ioctl(dev,cmd,arg);
2028 }
2029
2030
2031 static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname,
2032 void __user *optval,int optlen)
2033 {
2034 return -EINVAL;
2035 }
2036
2037
2038 static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname,
2039 void __user *optval,unsigned int optlen)
2040 {
2041 return -EINVAL;
2042 }
2043
2044
2045 static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb)
2046 {
2047 enum enq_res res;
2048
2049 DPRINTK(">eni_send\n");
2050 if (!ENI_VCC(vcc)->tx) {
2051 if (vcc->pop) vcc->pop(vcc,skb);
2052 else dev_kfree_skb(skb);
2053 return -EINVAL;
2054 }
2055 if (!skb) {
2056 printk(KERN_CRIT "!skb in eni_send ?\n");
2057 if (vcc->pop) vcc->pop(vcc,skb);
2058 return -EINVAL;
2059 }
2060 if (vcc->qos.aal == ATM_AAL0) {
2061 if (skb->len != ATM_CELL_SIZE-1) {
2062 if (vcc->pop) vcc->pop(vcc,skb);
2063 else dev_kfree_skb(skb);
2064 return -EINVAL;
2065 }
2066 *(u32 *) skb->data = htonl(*(u32 *) skb->data);
2067 }
2068 submitted++;
2069 ATM_SKB(skb)->vcc = vcc;
2070 tasklet_disable(&ENI_DEV(vcc->dev)->task);
2071 res = do_tx(skb);
2072 tasklet_enable(&ENI_DEV(vcc->dev)->task);
2073 if (res == enq_ok) return 0;
2074 skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb);
2075 backlogged++;
2076 tasklet_schedule(&ENI_DEV(vcc->dev)->task);
2077 return 0;
2078 }
2079
2080 static void eni_phy_put(struct atm_dev *dev,unsigned char value,
2081 unsigned long addr)
2082 {
2083 writel(value,ENI_DEV(dev)->phy+addr*4);
2084 }
2085
2086
2087
2088 static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr)
2089 {
2090 return readl(ENI_DEV(dev)->phy+addr*4);
2091 }
2092
2093
2094 static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page)
2095 {
2096 struct sock *s;
2097 static const char *signal[] = { "LOST","unknown","okay" };
2098 struct eni_dev *eni_dev = ENI_DEV(dev);
2099 struct atm_vcc *vcc;
2100 int left,i;
2101
2102 left = *pos;
2103 if (!left)
2104 return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, "
2105 "%d cps remaining\n",dev->number,signal[(int) dev->signal],
2106 eni_dev->mem >> 10,eni_dev->tx_bw);
2107 if (!--left)
2108 return sprintf(page,"%4sBursts: TX"
2109 #if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \
2110 !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \
2111 !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \
2112 !defined(CONFIG_ATM_ENI_BURST_TX_2W)
2113 " none"
2114 #endif
2115 #ifdef CONFIG_ATM_ENI_BURST_TX_16W
2116 " 16W"
2117 #endif
2118 #ifdef CONFIG_ATM_ENI_BURST_TX_8W
2119 " 8W"
2120 #endif
2121 #ifdef CONFIG_ATM_ENI_BURST_TX_4W
2122 " 4W"
2123 #endif
2124 #ifdef CONFIG_ATM_ENI_BURST_TX_2W
2125 " 2W"
2126 #endif
2127 ", RX"
2128 #if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \
2129 !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \
2130 !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \
2131 !defined(CONFIG_ATM_ENI_BURST_RX_2W)
2132 " none"
2133 #endif
2134 #ifdef CONFIG_ATM_ENI_BURST_RX_16W
2135 " 16W"
2136 #endif
2137 #ifdef CONFIG_ATM_ENI_BURST_RX_8W
2138 " 8W"
2139 #endif
2140 #ifdef CONFIG_ATM_ENI_BURST_RX_4W
2141 " 4W"
2142 #endif
2143 #ifdef CONFIG_ATM_ENI_BURST_RX_2W
2144 " 2W"
2145 #endif
2146 #ifndef CONFIG_ATM_ENI_TUNE_BURST
2147 " (default)"
2148 #endif
2149 "\n","");
2150 if (!--left)
2151 return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n",
2152 "",eni_dev->tx_mult,eni_dev->rx_mult);
2153 for (i = 0; i < NR_CHAN; i++) {
2154 struct eni_tx *tx = eni_dev->tx+i;
2155
2156 if (!tx->send) continue;
2157 if (!--left) {
2158 return sprintf(page, "tx[%d]: 0x%lx-0x%lx "
2159 "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i,
2160 (unsigned long) (tx->send - eni_dev->ram),
2161 tx->send-eni_dev->ram+tx->words*4-1,tx->words*4,
2162 tx->reserved,tx->shaping,
2163 tx == eni_dev->ubr ? " (UBR)" : "");
2164 }
2165 if (--left) continue;
2166 return sprintf(page,"%10sbacklog %u packets\n","",
2167 skb_queue_len(&tx->backlog));
2168 }
2169 read_lock(&vcc_sklist_lock);
2170 for(i = 0; i < VCC_HTABLE_SIZE; ++i) {
2171 struct hlist_head *head = &vcc_hash[i];
2172
2173 sk_for_each(s, head) {
2174 struct eni_vcc *eni_vcc;
2175 int length;
2176
2177 vcc = atm_sk(s);
2178 if (vcc->dev != dev)
2179 continue;
2180 eni_vcc = ENI_VCC(vcc);
2181 if (--left) continue;
2182 length = sprintf(page,"vcc %4d: ",vcc->vci);
2183 if (eni_vcc->rx) {
2184 length += sprintf(page+length, "0x%lx-0x%lx "
2185 "(%6ld bytes)",
2186 (unsigned long) (eni_vcc->recv - eni_dev->ram),
2187 eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1,
2188 eni_vcc->words*4);
2189 if (eni_vcc->tx) length += sprintf(page+length,", ");
2190 }
2191 if (eni_vcc->tx)
2192 length += sprintf(page+length,"tx[%d], txing %d bytes",
2193 eni_vcc->tx->index,eni_vcc->txing);
2194 page[length] = '\n';
2195 read_unlock(&vcc_sklist_lock);
2196 return length+1;
2197 }
2198 }
2199 read_unlock(&vcc_sklist_lock);
2200 for (i = 0; i < eni_dev->free_len; i++) {
2201 struct eni_free *fe = eni_dev->free_list+i;
2202 unsigned long offset;
2203
2204 if (--left) continue;
2205 offset = (unsigned long) eni_dev->ram+eni_dev->base_diff;
2206 return sprintf(page,"free %p-%p (%6d bytes)\n",
2207 fe->start-offset,fe->start-offset+(1 << fe->order)-1,
2208 1 << fe->order);
2209 }
2210 return 0;
2211 }
2212
2213
2214 static const struct atmdev_ops ops = {
2215 .open = eni_open,
2216 .close = eni_close,
2217 .ioctl = eni_ioctl,
2218 .getsockopt = eni_getsockopt,
2219 .setsockopt = eni_setsockopt,
2220 .send = eni_send,
2221 .phy_put = eni_phy_put,
2222 .phy_get = eni_phy_get,
2223 .change_qos = eni_change_qos,
2224 .proc_read = eni_proc_read
2225 };
2226
2227
2228 static int eni_init_one(struct pci_dev *pci_dev,
2229 const struct pci_device_id *ent)
2230 {
2231 struct atm_dev *dev;
2232 struct eni_dev *eni_dev;
2233 struct eni_zero *zero;
2234 int rc;
2235
2236 rc = pci_enable_device(pci_dev);
2237 if (rc < 0)
2238 goto out;
2239
2240 rc = dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(32));
2241 if (rc < 0)
2242 goto out;
2243
2244 rc = -ENOMEM;
2245 eni_dev = kmalloc(sizeof(struct eni_dev), GFP_KERNEL);
2246 if (!eni_dev)
2247 goto err_disable;
2248
2249 zero = &eni_dev->zero;
2250 zero->addr = dma_alloc_coherent(&pci_dev->dev,
2251 ENI_ZEROES_SIZE, &zero->dma, GFP_KERNEL);
2252 if (!zero->addr)
2253 goto err_kfree;
2254
2255 dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL);
2256 if (!dev)
2257 goto err_free_consistent;
2258
2259 dev->dev_data = eni_dev;
2260 pci_set_drvdata(pci_dev, dev);
2261 eni_dev->pci_dev = pci_dev;
2262 eni_dev->asic = ent->driver_data;
2263
2264 rc = eni_do_init(dev);
2265 if (rc < 0)
2266 goto err_unregister;
2267
2268 rc = eni_start(dev);
2269 if (rc < 0)
2270 goto err_eni_release;
2271
2272 eni_dev->more = eni_boards;
2273 eni_boards = dev;
2274 out:
2275 return rc;
2276
2277 err_eni_release:
2278 eni_do_release(dev);
2279 err_unregister:
2280 atm_dev_deregister(dev);
2281 err_free_consistent:
2282 dma_free_coherent(&pci_dev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2283 err_kfree:
2284 kfree(eni_dev);
2285 err_disable:
2286 pci_disable_device(pci_dev);
2287 goto out;
2288 }
2289
2290
2291 static const struct pci_device_id eni_pci_tbl[] = {
2292 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_FPGA), 0 /* FPGA */ },
2293 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_ASIC), 1 /* ASIC */ },
2294 { 0, }
2295 };
2296 MODULE_DEVICE_TABLE(pci,eni_pci_tbl);
2297
2298
2299 static void eni_remove_one(struct pci_dev *pdev)
2300 {
2301 struct atm_dev *dev = pci_get_drvdata(pdev);
2302 struct eni_dev *ed = ENI_DEV(dev);
2303 struct eni_zero *zero = &ed->zero;
2304
2305 eni_do_release(dev);
2306 atm_dev_deregister(dev);
2307 dma_free_coherent(&pdev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2308 kfree(ed);
2309 pci_disable_device(pdev);
2310 }
2311
2312
2313 static struct pci_driver eni_driver = {
2314 .name = DEV_LABEL,
2315 .id_table = eni_pci_tbl,
2316 .probe = eni_init_one,
2317 .remove = eni_remove_one,
2318 };
2319
2320
2321 static int __init eni_init(void)
2322 {
2323 struct sk_buff *skb; /* dummy for sizeof */
2324
2325 BUILD_BUG_ON(sizeof(skb->cb) < sizeof(struct eni_skb_prv));
2326 return pci_register_driver(&eni_driver);
2327 }
2328
2329
2330 module_init(eni_init);
2331 /* @@@ since exit routine not defined, this module can not be unloaded */
2332
2333 MODULE_LICENSE("GPL");
Linux with added FPC-III support