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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
80static 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
103static const char *ev[EV];
104static unsigned long ev_a[EV],ev_b[EV];
105static int ec = 0;
106
107
108static 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
117static 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
147static 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
151static 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
161static 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
172static 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
196static 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
229static 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
267static 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
307static 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
338static 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
478trouble:
479 if (paddr)
480 dma_unmap_single(&eni_dev->pci_dev->dev,paddr,skb->len,
481 DMA_FROM_DEVICE);
482dma_map_error:
483 if (skb) dev_kfree_skb_irq(skb);
484 return -1;
485}
486
487
488static 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
506static 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
543static 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
612static 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
651static 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
676static 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
720static 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
775static 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
804static 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
835static 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
899static 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
925enum enq_res { enq_ok,enq_next,enq_jam };
926
927
928static 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
1027static 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 unsigned char skb_data3;
1038
1039 DPRINTK(">do_tx\n");
1040 NULLCHECK(skb);
1041 EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len);
1042 vcc = ATM_SKB(skb)->vcc;
1043 NULLCHECK(vcc);
1044 eni_dev = ENI_DEV(vcc->dev);
1045 NULLCHECK(eni_dev);
1046 eni_vcc = ENI_VCC(vcc);
1047 tx = eni_vcc->tx;
1048 NULLCHECK(tx);
1049#if 0 /* Enable this for testing with the "align" program */
1050 {
1051 unsigned int hack = *((char *) skb->data)-'0';
1052
1053 if (hack < 8) {
1054 skb->data += hack;
1055 skb->len -= hack;
1056 }
1057 }
1058#endif
1059#if 0 /* should work now */
1060 if ((unsigned long) skb->data & 3)
1061 printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned "
1062 "TX data\n",vcc->dev->number,vcc->vci);
1063#endif
1064 /*
1065 * Potential future IP speedup: make hard_header big enough to put
1066 * segmentation descriptor directly into PDU. Saves: 4 slave writes,
1067 * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-)
1068 */
1069
1070 aal5 = vcc->qos.aal == ATM_AAL5;
1071 /* check space in buffer */
1072 if (!aal5)
1073 size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE;
1074 /* cell without HEC plus segmentation header (includes
1075 four-byte cell header) */
1076 else {
1077 size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1;
1078 /* add AAL5 trailer */
1079 size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE;
1080 /* add segmentation header */
1081 }
1082 /*
1083 * Can I move tx_pos by size bytes without getting closer than TX_GAP
1084 * to the read pointer ? TX_GAP means to leave some space for what
1085 * the manual calls "too close".
1086 */
1087 if (!NEPMOK(tx->tx_pos,size+TX_GAP,
1088 eni_in(MID_TX_RDPTR(tx->index)),tx->words)) {
1089 DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n",
1090 vcc->dev->number,size);
1091 return enq_next;
1092 }
1093 /* check DMA */
1094 dma_wr = eni_in(MID_DMA_WR_TX);
1095 dma_rd = eni_in(MID_DMA_RD_TX);
1096 dma_size = 3; /* JK for descriptor and final fill, plus final size
1097 mis-alignment fix */
1098DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags);
1099 if (!skb_shinfo(skb)->nr_frags) dma_size += 5;
1100 else dma_size += 5*(skb_shinfo(skb)->nr_frags+1);
1101 if (dma_size > TX_DMA_BUF) {
1102 printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries "
1103 "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF);
1104 }
1105 DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos);
1106 if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) <
1107 dma_size) {
1108 printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n",
1109 vcc->dev->number);
1110 return enq_jam;
1111 }
1112 skb_data3 = skb->data[3];
1113 paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len,
1114 DMA_TO_DEVICE);
1115 if (dma_mapping_error(&eni_dev->pci_dev->dev, paddr))
1116 return enq_next;
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 {
1128DPRINTK("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_frag_off(&skb_shinfo(skb)->frags[i]),
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_data3 & 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
1182static 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
1206static 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
1240static 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
1250static 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
1287static 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
1375static 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
1384static int open_tx_second(struct atm_vcc *vcc)
1385{
1386 return 0; /* nothing to do */
1387}
1388
1389
1390static 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
1433static 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
1459static void foo(void)
1460{
1461printk(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);
1466if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost);
1467}
1468
1469#endif
1470
1471
1472static 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
1490static 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
1526static 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
1573static 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
1597static 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
1689static 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
1700static 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(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) & DAUGHTER_ID]);
1783
1784 error = suni_init(dev);
1785 if (error)
1786 goto unmap;
1787out:
1788 return error;
1789unmap:
1790 iounmap(base);
1791 goto out;
1792}
1793
1794static 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
1803static 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
1883free_list:
1884 kfree(eni_dev->free_list);
1885
1886free_irq:
1887 free_irq(eni_dev->irq, dev);
1888
1889out:
1890 return error;
1891}
1892
1893
1894static 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
1910static 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
1956static 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
1995static 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
2034static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb)
2035{
2036 enum enq_res res;
2037
2038 DPRINTK(">eni_send\n");
2039 if (!ENI_VCC(vcc)->tx) {
2040 if (vcc->pop) vcc->pop(vcc,skb);
2041 else dev_kfree_skb(skb);
2042 return -EINVAL;
2043 }
2044 if (!skb) {
2045 printk(KERN_CRIT "!skb in eni_send ?\n");
2046 if (vcc->pop) vcc->pop(vcc,skb);
2047 return -EINVAL;
2048 }
2049 if (vcc->qos.aal == ATM_AAL0) {
2050 if (skb->len != ATM_CELL_SIZE-1) {
2051 if (vcc->pop) vcc->pop(vcc,skb);
2052 else dev_kfree_skb(skb);
2053 return -EINVAL;
2054 }
2055 *(u32 *) skb->data = htonl(*(u32 *) skb->data);
2056 }
2057 submitted++;
2058 ATM_SKB(skb)->vcc = vcc;
2059 tasklet_disable_in_atomic(&ENI_DEV(vcc->dev)->task);
2060 res = do_tx(skb);
2061 tasklet_enable(&ENI_DEV(vcc->dev)->task);
2062 if (res == enq_ok) return 0;
2063 skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb);
2064 backlogged++;
2065 tasklet_schedule(&ENI_DEV(vcc->dev)->task);
2066 return 0;
2067}
2068
2069static void eni_phy_put(struct atm_dev *dev,unsigned char value,
2070 unsigned long addr)
2071{
2072 writel(value,ENI_DEV(dev)->phy+addr*4);
2073}
2074
2075
2076
2077static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr)
2078{
2079 return readl(ENI_DEV(dev)->phy+addr*4);
2080}
2081
2082
2083static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page)
2084{
2085 struct sock *s;
2086 static const char *signal[] = { "LOST","unknown","okay" };
2087 struct eni_dev *eni_dev = ENI_DEV(dev);
2088 struct atm_vcc *vcc;
2089 int left,i;
2090
2091 left = *pos;
2092 if (!left)
2093 return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, "
2094 "%d cps remaining\n",dev->number,signal[(int) dev->signal],
2095 eni_dev->mem >> 10,eni_dev->tx_bw);
2096 if (!--left)
2097 return sprintf(page,"%4sBursts: TX"
2098#if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \
2099 !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \
2100 !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \
2101 !defined(CONFIG_ATM_ENI_BURST_TX_2W)
2102 " none"
2103#endif
2104#ifdef CONFIG_ATM_ENI_BURST_TX_16W
2105 " 16W"
2106#endif
2107#ifdef CONFIG_ATM_ENI_BURST_TX_8W
2108 " 8W"
2109#endif
2110#ifdef CONFIG_ATM_ENI_BURST_TX_4W
2111 " 4W"
2112#endif
2113#ifdef CONFIG_ATM_ENI_BURST_TX_2W
2114 " 2W"
2115#endif
2116 ", RX"
2117#if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \
2118 !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \
2119 !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \
2120 !defined(CONFIG_ATM_ENI_BURST_RX_2W)
2121 " none"
2122#endif
2123#ifdef CONFIG_ATM_ENI_BURST_RX_16W
2124 " 16W"
2125#endif
2126#ifdef CONFIG_ATM_ENI_BURST_RX_8W
2127 " 8W"
2128#endif
2129#ifdef CONFIG_ATM_ENI_BURST_RX_4W
2130 " 4W"
2131#endif
2132#ifdef CONFIG_ATM_ENI_BURST_RX_2W
2133 " 2W"
2134#endif
2135#ifndef CONFIG_ATM_ENI_TUNE_BURST
2136 " (default)"
2137#endif
2138 "\n","");
2139 if (!--left)
2140 return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n",
2141 "",eni_dev->tx_mult,eni_dev->rx_mult);
2142 for (i = 0; i < NR_CHAN; i++) {
2143 struct eni_tx *tx = eni_dev->tx+i;
2144
2145 if (!tx->send) continue;
2146 if (!--left) {
2147 return sprintf(page, "tx[%d]: 0x%lx-0x%lx "
2148 "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i,
2149 (unsigned long) (tx->send - eni_dev->ram),
2150 tx->send-eni_dev->ram+tx->words*4-1,tx->words*4,
2151 tx->reserved,tx->shaping,
2152 tx == eni_dev->ubr ? " (UBR)" : "");
2153 }
2154 if (--left) continue;
2155 return sprintf(page,"%10sbacklog %u packets\n","",
2156 skb_queue_len(&tx->backlog));
2157 }
2158 read_lock(&vcc_sklist_lock);
2159 for(i = 0; i < VCC_HTABLE_SIZE; ++i) {
2160 struct hlist_head *head = &vcc_hash[i];
2161
2162 sk_for_each(s, head) {
2163 struct eni_vcc *eni_vcc;
2164 int length;
2165
2166 vcc = atm_sk(s);
2167 if (vcc->dev != dev)
2168 continue;
2169 eni_vcc = ENI_VCC(vcc);
2170 if (--left) continue;
2171 length = sprintf(page,"vcc %4d: ",vcc->vci);
2172 if (eni_vcc->rx) {
2173 length += sprintf(page+length, "0x%lx-0x%lx "
2174 "(%6ld bytes)",
2175 (unsigned long) (eni_vcc->recv - eni_dev->ram),
2176 eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1,
2177 eni_vcc->words*4);
2178 if (eni_vcc->tx) length += sprintf(page+length,", ");
2179 }
2180 if (eni_vcc->tx)
2181 length += sprintf(page+length,"tx[%d], txing %d bytes",
2182 eni_vcc->tx->index,eni_vcc->txing);
2183 page[length] = '\n';
2184 read_unlock(&vcc_sklist_lock);
2185 return length+1;
2186 }
2187 }
2188 read_unlock(&vcc_sklist_lock);
2189 for (i = 0; i < eni_dev->free_len; i++) {
2190 struct eni_free *fe = eni_dev->free_list+i;
2191 unsigned long offset;
2192
2193 if (--left) continue;
2194 offset = (unsigned long) eni_dev->ram+eni_dev->base_diff;
2195 return sprintf(page,"free %p-%p (%6d bytes)\n",
2196 fe->start-offset,fe->start-offset+(1 << fe->order)-1,
2197 1 << fe->order);
2198 }
2199 return 0;
2200}
2201
2202
2203static const struct atmdev_ops ops = {
2204 .open = eni_open,
2205 .close = eni_close,
2206 .ioctl = eni_ioctl,
2207 .send = eni_send,
2208 .phy_put = eni_phy_put,
2209 .phy_get = eni_phy_get,
2210 .change_qos = eni_change_qos,
2211 .proc_read = eni_proc_read
2212};
2213
2214
2215static int eni_init_one(struct pci_dev *pci_dev,
2216 const struct pci_device_id *ent)
2217{
2218 struct atm_dev *dev;
2219 struct eni_dev *eni_dev;
2220 struct eni_zero *zero;
2221 int rc;
2222
2223 rc = pci_enable_device(pci_dev);
2224 if (rc < 0)
2225 goto out;
2226
2227 rc = dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(32));
2228 if (rc < 0)
2229 goto err_disable;
2230
2231 rc = -ENOMEM;
2232 eni_dev = kmalloc(sizeof(struct eni_dev), GFP_KERNEL);
2233 if (!eni_dev)
2234 goto err_disable;
2235
2236 zero = &eni_dev->zero;
2237 zero->addr = dma_alloc_coherent(&pci_dev->dev,
2238 ENI_ZEROES_SIZE, &zero->dma, GFP_KERNEL);
2239 if (!zero->addr)
2240 goto err_kfree;
2241
2242 dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL);
2243 if (!dev)
2244 goto err_free_consistent;
2245
2246 dev->dev_data = eni_dev;
2247 pci_set_drvdata(pci_dev, dev);
2248 eni_dev->pci_dev = pci_dev;
2249 eni_dev->asic = ent->driver_data;
2250
2251 rc = eni_do_init(dev);
2252 if (rc < 0)
2253 goto err_unregister;
2254
2255 rc = eni_start(dev);
2256 if (rc < 0)
2257 goto err_eni_release;
2258
2259 eni_dev->more = eni_boards;
2260 eni_boards = dev;
2261out:
2262 return rc;
2263
2264err_eni_release:
2265 dev->phy = NULL;
2266 iounmap(ENI_DEV(dev)->ioaddr);
2267err_unregister:
2268 atm_dev_deregister(dev);
2269err_free_consistent:
2270 dma_free_coherent(&pci_dev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2271err_kfree:
2272 kfree(eni_dev);
2273err_disable:
2274 pci_disable_device(pci_dev);
2275 goto out;
2276}
2277
2278
2279static const struct pci_device_id eni_pci_tbl[] = {
2280 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_FPGA), 0 /* FPGA */ },
2281 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_ASIC), 1 /* ASIC */ },
2282 { 0, }
2283};
2284MODULE_DEVICE_TABLE(pci,eni_pci_tbl);
2285
2286
2287static void eni_remove_one(struct pci_dev *pdev)
2288{
2289 struct atm_dev *dev = pci_get_drvdata(pdev);
2290 struct eni_dev *ed = ENI_DEV(dev);
2291 struct eni_zero *zero = &ed->zero;
2292
2293 eni_do_release(dev);
2294 atm_dev_deregister(dev);
2295 dma_free_coherent(&pdev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2296 kfree(ed);
2297 pci_disable_device(pdev);
2298}
2299
2300
2301static struct pci_driver eni_driver = {
2302 .name = DEV_LABEL,
2303 .id_table = eni_pci_tbl,
2304 .probe = eni_init_one,
2305 .remove = eni_remove_one,
2306};
2307
2308
2309static int __init eni_init(void)
2310{
2311 struct sk_buff *skb; /* dummy for sizeof */
2312
2313 BUILD_BUG_ON(sizeof(skb->cb) < sizeof(struct eni_skb_prv));
2314 return pci_register_driver(&eni_driver);
2315}
2316
2317
2318module_init(eni_init);
2319/* @@@ since exit routine not defined, this module can not be unloaded */
2320
2321MODULE_DESCRIPTION("Efficient Networks ENI155P ATM NIC driver");
2322MODULE_LICENSE("GPL");
1/* drivers/atm/eni.c - Efficient Networks ENI155P device driver */
2
3/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
4
5
6#include <linux/module.h>
7#include <linux/kernel.h>
8#include <linux/mm.h>
9#include <linux/pci.h>
10#include <linux/errno.h>
11#include <linux/atm.h>
12#include <linux/atmdev.h>
13#include <linux/sonet.h>
14#include <linux/skbuff.h>
15#include <linux/time.h>
16#include <linux/delay.h>
17#include <linux/uio.h>
18#include <linux/init.h>
19#include <linux/atm_eni.h>
20#include <linux/bitops.h>
21#include <linux/slab.h>
22#include <asm/io.h>
23#include <linux/atomic.h>
24#include <asm/uaccess.h>
25#include <asm/string.h>
26#include <asm/byteorder.h>
27
28#include "tonga.h"
29#include "midway.h"
30#include "suni.h"
31#include "eni.h"
32
33#if !defined(__i386__) && !defined(__x86_64__)
34#ifndef ioremap_nocache
35#define ioremap_nocache(X,Y) ioremap(X,Y)
36#endif
37#endif
38
39/*
40 * TODO:
41 *
42 * Show stoppers
43 * none
44 *
45 * Minor
46 * - OAM support
47 * - fix bugs listed below
48 */
49
50/*
51 * KNOWN BUGS:
52 *
53 * - may run into JK-JK bug and deadlock
54 * - should allocate UBR channel first
55 * - buffer space allocation algorithm is stupid
56 * (RX: should be maxSDU+maxdelay*rate
57 * TX: should be maxSDU+min(maxSDU,maxdelay*rate) )
58 * - doesn't support OAM cells
59 * - eni_put_free may hang if not putting memory fragments that _complete_
60 * 2^n block (never happens in real life, though)
61 */
62
63
64#if 0
65#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
66#else
67#define DPRINTK(format,args...)
68#endif
69
70
71#ifndef CONFIG_ATM_ENI_TUNE_BURST
72#define CONFIG_ATM_ENI_BURST_TX_8W
73#define CONFIG_ATM_ENI_BURST_RX_4W
74#endif
75
76
77#ifndef CONFIG_ATM_ENI_DEBUG
78
79
80#define NULLCHECK(x)
81
82#define EVENT(s,a,b)
83
84
85static void event_dump(void)
86{
87}
88
89
90#else
91
92
93/*
94 * NULL pointer checking
95 */
96
97#define NULLCHECK(x) \
98 if ((unsigned long) (x) < 0x30) \
99 printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x))
100
101/*
102 * Very extensive activity logging. Greatly improves bug detection speed but
103 * costs a few Mbps if enabled.
104 */
105
106#define EV 64
107
108static const char *ev[EV];
109static unsigned long ev_a[EV],ev_b[EV];
110static int ec = 0;
111
112
113static void EVENT(const char *s,unsigned long a,unsigned long b)
114{
115 ev[ec] = s;
116 ev_a[ec] = a;
117 ev_b[ec] = b;
118 ec = (ec+1) % EV;
119}
120
121
122static void event_dump(void)
123{
124 int n,i;
125
126 for (n = 0; n < EV; n++) {
127 i = (ec+n) % EV;
128 printk(KERN_NOTICE);
129 printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]);
130 }
131}
132
133
134#endif /* CONFIG_ATM_ENI_DEBUG */
135
136
137/*
138 * NExx must not be equal at end
139 * EExx may be equal at end
140 * xxPJOK verify validity of pointer jumps
141 * xxPMOK operating on a circular buffer of "c" words
142 */
143
144#define NEPJOK(a0,a1,b) \
145 ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1))
146#define EEPJOK(a0,a1,b) \
147 ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1))
148#define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b)
149#define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b)
150
151
152static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0,
153 backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0,
154 putting = 0;
155
156static struct atm_dev *eni_boards = NULL;
157
158/* Read/write registers on card */
159#define eni_in(r) readl(eni_dev->reg+(r)*4)
160#define eni_out(v,r) writel((v),eni_dev->reg+(r)*4)
161
162
163/*-------------------------------- utilities --------------------------------*/
164
165
166static void dump_mem(struct eni_dev *eni_dev)
167{
168 int i;
169
170 for (i = 0; i < eni_dev->free_len; i++)
171 printk(KERN_DEBUG " %d: %p %d\n",i,
172 eni_dev->free_list[i].start,
173 1 << eni_dev->free_list[i].order);
174}
175
176
177static void dump(struct atm_dev *dev)
178{
179 struct eni_dev *eni_dev;
180
181 int i;
182
183 eni_dev = ENI_DEV(dev);
184 printk(KERN_NOTICE "Free memory\n");
185 dump_mem(eni_dev);
186 printk(KERN_NOTICE "TX buffers\n");
187 for (i = 0; i < NR_CHAN; i++)
188 if (eni_dev->tx[i].send)
189 printk(KERN_NOTICE " TX %d @ %p: %ld\n",i,
190 eni_dev->tx[i].send,eni_dev->tx[i].words*4);
191 printk(KERN_NOTICE "RX buffers\n");
192 for (i = 0; i < 1024; i++)
193 if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx)
194 printk(KERN_NOTICE " RX %d @ %p: %ld\n",i,
195 ENI_VCC(eni_dev->rx_map[i])->recv,
196 ENI_VCC(eni_dev->rx_map[i])->words*4);
197 printk(KERN_NOTICE "----\n");
198}
199
200
201static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start,
202 unsigned long size)
203{
204 struct eni_free *list;
205 int len,order;
206
207 DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size);
208 start += eni_dev->base_diff;
209 list = eni_dev->free_list;
210 len = eni_dev->free_len;
211 while (size) {
212 if (len >= eni_dev->free_list_size) {
213 printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n",
214 start,size);
215 break;
216 }
217 for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++);
218 if (MID_MIN_BUF_SIZE > (1 << order)) {
219 printk(KERN_CRIT "eni_put_free: order %d too small\n",
220 order);
221 break;
222 }
223 list[len].start = (void __iomem *) start;
224 list[len].order = order;
225 len++;
226 start += 1 << order;
227 size -= 1 << order;
228 }
229 eni_dev->free_len = len;
230 /*dump_mem(eni_dev);*/
231}
232
233
234static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size)
235{
236 struct eni_free *list;
237 void __iomem *start;
238 int len,i,order,best_order,index;
239
240 list = eni_dev->free_list;
241 len = eni_dev->free_len;
242 if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE;
243 if (*size > MID_MAX_BUF_SIZE) return NULL;
244 for (order = 0; (1 << order) < *size; order++);
245 DPRINTK("trying: %ld->%d\n",*size,order);
246 best_order = 65; /* we don't have more than 2^64 of anything ... */
247 index = 0; /* silence GCC */
248 for (i = 0; i < len; i++)
249 if (list[i].order == order) {
250 best_order = order;
251 index = i;
252 break;
253 }
254 else if (best_order > list[i].order && list[i].order > order) {
255 best_order = list[i].order;
256 index = i;
257 }
258 if (best_order == 65) return NULL;
259 start = list[index].start-eni_dev->base_diff;
260 list[index] = list[--len];
261 eni_dev->free_len = len;
262 *size = 1 << order;
263 eni_put_free(eni_dev,start+*size,(1 << best_order)-*size);
264 DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start);
265 memset_io(start,0,*size); /* never leak data */
266 /*dump_mem(eni_dev);*/
267 return start;
268}
269
270
271static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start,
272 unsigned long size)
273{
274 struct eni_free *list;
275 int len,i,order;
276
277 start += eni_dev->base_diff;
278 list = eni_dev->free_list;
279 len = eni_dev->free_len;
280 for (order = -1; size; order++) size >>= 1;
281 DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order);
282 for (i = 0; i < len; i++)
283 if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) &&
284 list[i].order == order) {
285 DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i,
286 list[i].start,start,1 << order,list[i].order,order);
287 list[i] = list[--len];
288 start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order));
289 order++;
290 i = -1;
291 continue;
292 }
293 if (len >= eni_dev->free_list_size) {
294 printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start,
295 order);
296 return;
297 }
298 list[len].start = start;
299 list[len].order = order;
300 eni_dev->free_len = len+1;
301 /*dump_mem(eni_dev);*/
302}
303
304
305/*----------------------------------- RX ------------------------------------*/
306
307
308#define ENI_VCC_NOS ((struct atm_vcc *) 1)
309
310
311static void rx_ident_err(struct atm_vcc *vcc)
312{
313 struct atm_dev *dev;
314 struct eni_dev *eni_dev;
315 struct eni_vcc *eni_vcc;
316
317 dev = vcc->dev;
318 eni_dev = ENI_DEV(dev);
319 /* immediately halt adapter */
320 eni_out(eni_in(MID_MC_S) &
321 ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S);
322 /* dump useful information */
323 eni_vcc = ENI_VCC(vcc);
324 printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident "
325 "mismatch\n",dev->number);
326 printk(KERN_ALERT " VCI %d, rxing %d, words %ld\n",vcc->vci,
327 eni_vcc->rxing,eni_vcc->words);
328 printk(KERN_ALERT " host descr 0x%lx, rx pos 0x%lx, descr value "
329 "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos,
330 (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4));
331 printk(KERN_ALERT " last %p, servicing %d\n",eni_vcc->last,
332 eni_vcc->servicing);
333 EVENT("---dump ends here---\n",0,0);
334 printk(KERN_NOTICE "---recent events---\n");
335 event_dump();
336 ENI_DEV(dev)->fast = NULL; /* really stop it */
337 ENI_DEV(dev)->slow = NULL;
338 skb_queue_head_init(&ENI_DEV(dev)->rx_queue);
339}
340
341
342static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb,
343 unsigned long skip,unsigned long size,unsigned long eff)
344{
345 struct eni_dev *eni_dev;
346 struct eni_vcc *eni_vcc;
347 u32 dma_rd,dma_wr;
348 u32 dma[RX_DMA_BUF*2];
349 dma_addr_t paddr;
350 unsigned long here;
351 int i,j;
352
353 eni_dev = ENI_DEV(vcc->dev);
354 eni_vcc = ENI_VCC(vcc);
355 paddr = 0; /* GCC, shut up */
356 if (skb) {
357 paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len,
358 PCI_DMA_FROMDEVICE);
359 ENI_PRV_PADDR(skb) = paddr;
360 if (paddr & 3)
361 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has "
362 "mis-aligned RX data (0x%lx)\n",vcc->dev->number,
363 vcc->vci,(unsigned long) paddr);
364 ENI_PRV_SIZE(skb) = size+skip;
365 /* PDU plus descriptor */
366 ATM_SKB(skb)->vcc = vcc;
367 }
368 j = 0;
369 if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */
370 here = (eni_vcc->descr+skip) & (eni_vcc->words-1);
371 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci
372 << MID_DMA_VCI_SHIFT) | MID_DT_JK;
373 j++;
374 }
375 here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1);
376 if (!eff) size += skip;
377 else {
378 unsigned long words;
379
380 if (!size) {
381 DPRINTK("strange things happen ...\n");
382 EVENT("strange things happen ... (skip=%ld,eff=%ld)\n",
383 size,eff);
384 }
385 words = eff;
386 if (paddr & 15) {
387 unsigned long init;
388
389 init = 4-((paddr & 15) >> 2);
390 if (init > words) init = words;
391 dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
392 (vcc->vci << MID_DMA_VCI_SHIFT);
393 dma[j++] = paddr;
394 paddr += init << 2;
395 words -= init;
396 }
397#ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */
398 if (words & ~15) {
399 dma[j++] = MID_DT_16W | ((words >> 4) <<
400 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
401 MID_DMA_VCI_SHIFT);
402 dma[j++] = paddr;
403 paddr += (words & ~15) << 2;
404 words &= 15;
405 }
406#endif
407#ifdef CONFIG_ATM_ENI_BURST_RX_8W /* works only with *some* PCI chipsets ... */
408 if (words & ~7) {
409 dma[j++] = MID_DT_8W | ((words >> 3) <<
410 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
411 MID_DMA_VCI_SHIFT);
412 dma[j++] = paddr;
413 paddr += (words & ~7) << 2;
414 words &= 7;
415 }
416#endif
417#ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */
418 if (words & ~3) {
419 dma[j++] = MID_DT_4W | ((words >> 2) <<
420 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
421 MID_DMA_VCI_SHIFT);
422 dma[j++] = paddr;
423 paddr += (words & ~3) << 2;
424 words &= 3;
425 }
426#endif
427#ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */
428 if (words & ~1) {
429 dma[j++] = MID_DT_2W | ((words >> 1) <<
430 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
431 MID_DMA_VCI_SHIFT);
432 dma[j++] = paddr;
433 paddr += (words & ~1) << 2;
434 words &= 1;
435 }
436#endif
437 if (words) {
438 dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT)
439 | (vcc->vci << MID_DMA_VCI_SHIFT);
440 dma[j++] = paddr;
441 }
442 }
443 if (size != eff) {
444 dma[j++] = (here << MID_DMA_COUNT_SHIFT) |
445 (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK;
446 j++;
447 }
448 if (!j || j > 2*RX_DMA_BUF) {
449 printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n");
450 goto trouble;
451 }
452 dma[j-2] |= MID_DMA_END;
453 j = j >> 1;
454 dma_wr = eni_in(MID_DMA_WR_RX);
455 dma_rd = eni_in(MID_DMA_RD_RX);
456 /*
457 * Can I move the dma_wr pointer by 2j+1 positions without overwriting
458 * data that hasn't been read (position of dma_rd) yet ?
459 */
460 if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */
461 printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n",
462 vcc->dev->number);
463 goto trouble;
464 }
465 for (i = 0; i < j; i++) {
466 writel(dma[i*2],eni_dev->rx_dma+dma_wr*8);
467 writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4);
468 dma_wr = (dma_wr+1) & (NR_DMA_RX-1);
469 }
470 if (skb) {
471 ENI_PRV_POS(skb) = eni_vcc->descr+size+1;
472 skb_queue_tail(&eni_dev->rx_queue,skb);
473 eni_vcc->last = skb;
474rx_enqueued++;
475 }
476 eni_vcc->descr = here;
477 eni_out(dma_wr,MID_DMA_WR_RX);
478 return 0;
479
480trouble:
481 if (paddr)
482 pci_unmap_single(eni_dev->pci_dev,paddr,skb->len,
483 PCI_DMA_FROMDEVICE);
484 if (skb) dev_kfree_skb_irq(skb);
485 return -1;
486}
487
488
489static void discard(struct atm_vcc *vcc,unsigned long size)
490{
491 struct eni_vcc *eni_vcc;
492
493 eni_vcc = ENI_VCC(vcc);
494 EVENT("discard (size=%ld)\n",size,0);
495 while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0);
496 /* could do a full fallback, but that might be more expensive */
497 if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1;
498 else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1);
499}
500
501
502/*
503 * TODO: should check whether direct copies (without DMA setup, dequeuing on
504 * interrupt, etc.) aren't much faster for AAL0
505 */
506
507static int rx_aal0(struct atm_vcc *vcc)
508{
509 struct eni_vcc *eni_vcc;
510 unsigned long descr;
511 unsigned long length;
512 struct sk_buff *skb;
513
514 DPRINTK(">rx_aal0\n");
515 eni_vcc = ENI_VCC(vcc);
516 descr = readl(eni_vcc->recv+eni_vcc->descr*4);
517 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
518 rx_ident_err(vcc);
519 return 1;
520 }
521 if (descr & MID_RED_T) {
522 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
523 vcc->dev->number);
524 length = 0;
525 atomic_inc(&vcc->stats->rx_err);
526 }
527 else {
528 length = ATM_CELL_SIZE-1; /* no HEC */
529 }
530 skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL;
531 if (!skb) {
532 discard(vcc,length >> 2);
533 return 0;
534 }
535 skb_put(skb,length);
536 skb->tstamp = eni_vcc->timestamp;
537 DPRINTK("got len %ld\n",length);
538 if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1;
539 eni_vcc->rxing++;
540 return 0;
541}
542
543
544static int rx_aal5(struct atm_vcc *vcc)
545{
546 struct eni_vcc *eni_vcc;
547 unsigned long descr;
548 unsigned long size,eff,length;
549 struct sk_buff *skb;
550
551 EVENT("rx_aal5\n",0,0);
552 DPRINTK(">rx_aal5\n");
553 eni_vcc = ENI_VCC(vcc);
554 descr = readl(eni_vcc->recv+eni_vcc->descr*4);
555 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
556 rx_ident_err(vcc);
557 return 1;
558 }
559 if (descr & (MID_RED_T | MID_RED_CRC_ERR)) {
560 if (descr & MID_RED_T) {
561 EVENT("empty cell (descr=0x%lx)\n",descr,0);
562 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
563 vcc->dev->number);
564 size = 0;
565 }
566 else {
567 static unsigned long silence = 0;
568
569 if (time_after(jiffies, silence) || silence == 0) {
570 printk(KERN_WARNING DEV_LABEL "(itf %d): "
571 "discarding PDU(s) with CRC error\n",
572 vcc->dev->number);
573 silence = (jiffies+2*HZ)|1;
574 }
575 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
576 EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr,
577 size);
578 }
579 eff = length = 0;
580 atomic_inc(&vcc->stats->rx_err);
581 }
582 else {
583 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
584 DPRINTK("size=%ld\n",size);
585 length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) &
586 (eni_vcc->words-1)))*4) & 0xffff;
587 /* -trailer(2)+header(1) */
588 if (length && length <= (size << 2)-8 && length <=
589 ATM_MAX_AAL5_PDU) eff = (length+3) >> 2;
590 else { /* ^ trailer length (8) */
591 EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr,
592 length);
593 printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU "
594 "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n",
595 vcc->dev->number,vcc->vci,length,size << 2,descr);
596 length = eff = 0;
597 atomic_inc(&vcc->stats->rx_err);
598 }
599 }
600 skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL;
601 if (!skb) {
602 discard(vcc,size);
603 return 0;
604 }
605 skb_put(skb,length);
606 DPRINTK("got len %ld\n",length);
607 if (do_rx_dma(vcc,skb,1,size,eff)) return 1;
608 eni_vcc->rxing++;
609 return 0;
610}
611
612
613static inline int rx_vcc(struct atm_vcc *vcc)
614{
615 void __iomem *vci_dsc;
616 unsigned long tmp;
617 struct eni_vcc *eni_vcc;
618
619 eni_vcc = ENI_VCC(vcc);
620 vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16;
621 EVENT("rx_vcc(1)\n",0,0);
622 while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >>
623 MID_VCI_DESCR_SHIFT)) {
624 EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n",
625 eni_vcc->descr,tmp);
626 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
627 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
628 MID_VCI_DESCR_SHIFT));
629 if (ENI_VCC(vcc)->rx(vcc)) return 1;
630 }
631 /* clear IN_SERVICE flag */
632 writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc);
633 /*
634 * If new data has arrived between evaluating the while condition and
635 * clearing IN_SERVICE, we wouldn't be notified until additional data
636 * follows. So we have to loop again to be sure.
637 */
638 EVENT("rx_vcc(3)\n",0,0);
639 while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR)
640 >> MID_VCI_DESCR_SHIFT)) {
641 EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n",
642 eni_vcc->descr,tmp);
643 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
644 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
645 MID_VCI_DESCR_SHIFT));
646 if (ENI_VCC(vcc)->rx(vcc)) return 1;
647 }
648 return 0;
649}
650
651
652static void poll_rx(struct atm_dev *dev)
653{
654 struct eni_dev *eni_dev;
655 struct atm_vcc *curr;
656
657 eni_dev = ENI_DEV(dev);
658 while ((curr = eni_dev->fast)) {
659 EVENT("poll_rx.fast\n",0,0);
660 if (rx_vcc(curr)) return;
661 eni_dev->fast = ENI_VCC(curr)->next;
662 ENI_VCC(curr)->next = ENI_VCC_NOS;
663 barrier();
664 ENI_VCC(curr)->servicing--;
665 }
666 while ((curr = eni_dev->slow)) {
667 EVENT("poll_rx.slow\n",0,0);
668 if (rx_vcc(curr)) return;
669 eni_dev->slow = ENI_VCC(curr)->next;
670 ENI_VCC(curr)->next = ENI_VCC_NOS;
671 barrier();
672 ENI_VCC(curr)->servicing--;
673 }
674}
675
676
677static void get_service(struct atm_dev *dev)
678{
679 struct eni_dev *eni_dev;
680 struct atm_vcc *vcc;
681 unsigned long vci;
682
683 DPRINTK(">get_service\n");
684 eni_dev = ENI_DEV(dev);
685 while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) {
686 vci = readl(eni_dev->service+eni_dev->serv_read*4);
687 eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1);
688 vcc = eni_dev->rx_map[vci & 1023];
689 if (!vcc) {
690 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not "
691 "found\n",dev->number,vci);
692 continue; /* nasty but we try to go on anyway */
693 /* @@@ nope, doesn't work */
694 }
695 EVENT("getting from service\n",0,0);
696 if (ENI_VCC(vcc)->next != ENI_VCC_NOS) {
697 EVENT("double service\n",0,0);
698 DPRINTK("Grr, servicing VCC %ld twice\n",vci);
699 continue;
700 }
701 ENI_VCC(vcc)->timestamp = ktime_get_real();
702 ENI_VCC(vcc)->next = NULL;
703 if (vcc->qos.rxtp.traffic_class == ATM_CBR) {
704 if (eni_dev->fast)
705 ENI_VCC(eni_dev->last_fast)->next = vcc;
706 else eni_dev->fast = vcc;
707 eni_dev->last_fast = vcc;
708 }
709 else {
710 if (eni_dev->slow)
711 ENI_VCC(eni_dev->last_slow)->next = vcc;
712 else eni_dev->slow = vcc;
713 eni_dev->last_slow = vcc;
714 }
715putting++;
716 ENI_VCC(vcc)->servicing++;
717 }
718}
719
720
721static void dequeue_rx(struct atm_dev *dev)
722{
723 struct eni_dev *eni_dev;
724 struct eni_vcc *eni_vcc;
725 struct atm_vcc *vcc;
726 struct sk_buff *skb;
727 void __iomem *vci_dsc;
728 int first;
729
730 eni_dev = ENI_DEV(dev);
731 first = 1;
732 while (1) {
733 skb = skb_dequeue(&eni_dev->rx_queue);
734 if (!skb) {
735 if (first) {
736 DPRINTK(DEV_LABEL "(itf %d): RX but not "
737 "rxing\n",dev->number);
738 EVENT("nothing to dequeue\n",0,0);
739 }
740 break;
741 }
742 EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb),
743 ENI_PRV_POS(skb));
744rx_dequeued++;
745 vcc = ATM_SKB(skb)->vcc;
746 eni_vcc = ENI_VCC(vcc);
747 first = 0;
748 vci_dsc = eni_dev->vci+vcc->vci*16;
749 if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb),
750 (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT,
751 eni_vcc->words)) {
752 EVENT("requeuing\n",0,0);
753 skb_queue_head(&eni_dev->rx_queue,skb);
754 break;
755 }
756 eni_vcc->rxing--;
757 eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1);
758 pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len,
759 PCI_DMA_TODEVICE);
760 if (!skb->len) dev_kfree_skb_irq(skb);
761 else {
762 EVENT("pushing (len=%ld)\n",skb->len,0);
763 if (vcc->qos.aal == ATM_AAL0)
764 *(unsigned long *) skb->data =
765 ntohl(*(unsigned long *) skb->data);
766 memset(skb->cb,0,sizeof(struct eni_skb_prv));
767 vcc->push(vcc,skb);
768 pushed++;
769 }
770 atomic_inc(&vcc->stats->rx);
771 }
772 wake_up(&eni_dev->rx_wait);
773}
774
775
776static int open_rx_first(struct atm_vcc *vcc)
777{
778 struct eni_dev *eni_dev;
779 struct eni_vcc *eni_vcc;
780 unsigned long size;
781
782 DPRINTK("open_rx_first\n");
783 eni_dev = ENI_DEV(vcc->dev);
784 eni_vcc = ENI_VCC(vcc);
785 eni_vcc->rx = NULL;
786 if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0;
787 size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100;
788 if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <=
789 MID_MAX_BUF_SIZE)
790 size = MID_MAX_BUF_SIZE;
791 eni_vcc->recv = eni_alloc_mem(eni_dev,&size);
792 DPRINTK("rx at 0x%lx\n",eni_vcc->recv);
793 eni_vcc->words = size >> 2;
794 if (!eni_vcc->recv) return -ENOBUFS;
795 eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0;
796 eni_vcc->descr = 0;
797 eni_vcc->rx_pos = 0;
798 eni_vcc->rxing = 0;
799 eni_vcc->servicing = 0;
800 eni_vcc->next = ENI_VCC_NOS;
801 return 0;
802}
803
804
805static int open_rx_second(struct atm_vcc *vcc)
806{
807 void __iomem *here;
808 struct eni_dev *eni_dev;
809 struct eni_vcc *eni_vcc;
810 unsigned long size;
811 int order;
812
813 DPRINTK("open_rx_second\n");
814 eni_dev = ENI_DEV(vcc->dev);
815 eni_vcc = ENI_VCC(vcc);
816 if (!eni_vcc->rx) return 0;
817 /* set up VCI descriptor */
818 here = eni_dev->vci+vcc->vci*16;
819 DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4);
820 size = eni_vcc->words >> 8;
821 for (order = -1; size; order++) size >>= 1;
822 writel(0,here+4); /* descr, read = 0 */
823 writel(0,here+8); /* write, state, count = 0 */
824 if (eni_dev->rx_map[vcc->vci])
825 printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already "
826 "in use\n",vcc->dev->number,vcc->vci);
827 eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */
828 writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) <<
829 MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE |
830 (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) <<
831 MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here);
832 return 0;
833}
834
835
836static void close_rx(struct atm_vcc *vcc)
837{
838 DECLARE_WAITQUEUE(wait,current);
839 void __iomem *here;
840 struct eni_dev *eni_dev;
841 struct eni_vcc *eni_vcc;
842
843 eni_vcc = ENI_VCC(vcc);
844 if (!eni_vcc->rx) return;
845 eni_dev = ENI_DEV(vcc->dev);
846 if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) {
847 here = eni_dev->vci+vcc->vci*16;
848 /* block receiver */
849 writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH <<
850 MID_VCI_MODE_SHIFT),here);
851 /* wait for receiver to become idle */
852 udelay(27);
853 /* discard pending cell */
854 writel(readl(here) & ~MID_VCI_IN_SERVICE,here);
855 /* don't accept any new ones */
856 eni_dev->rx_map[vcc->vci] = NULL;
857 /* wait for RX queue to drain */
858 DPRINTK("eni_close: waiting for RX ...\n");
859 EVENT("RX closing\n",0,0);
860 add_wait_queue(&eni_dev->rx_wait,&wait);
861 set_current_state(TASK_UNINTERRUPTIBLE);
862 barrier();
863 for (;;) {
864 /* transition service->rx: rxing++, servicing-- */
865 if (!eni_vcc->servicing) {
866 barrier();
867 if (!eni_vcc->rxing) break;
868 }
869 EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing,
870 eni_vcc->servicing);
871 printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing,
872 eni_vcc->rxing);
873 schedule();
874 set_current_state(TASK_UNINTERRUPTIBLE);
875 }
876 for (;;) {
877 int at_end;
878 u32 tmp;
879
880 tasklet_disable(&eni_dev->task);
881 tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ;
882 at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT;
883 tasklet_enable(&eni_dev->task);
884 if (at_end) break;
885 EVENT("drain discard (host 0x%lx, nic 0x%lx)\n",
886 eni_vcc->rx_pos,tmp);
887 printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n",
888 eni_vcc->rx_pos,tmp);
889 schedule();
890 set_current_state(TASK_UNINTERRUPTIBLE);
891 }
892 set_current_state(TASK_RUNNING);
893 remove_wait_queue(&eni_dev->rx_wait,&wait);
894 }
895 eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2);
896 eni_vcc->rx = NULL;
897}
898
899
900static int start_rx(struct atm_dev *dev)
901{
902 struct eni_dev *eni_dev;
903
904 eni_dev = ENI_DEV(dev);
905 eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL);
906 if (!eni_dev->rx_map) {
907 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
908 dev->number);
909 free_page((unsigned long) eni_dev->free_list);
910 return -ENOMEM;
911 }
912 eni_dev->rx_mult = DEFAULT_RX_MULT;
913 eni_dev->fast = eni_dev->last_fast = NULL;
914 eni_dev->slow = eni_dev->last_slow = NULL;
915 init_waitqueue_head(&eni_dev->rx_wait);
916 skb_queue_head_init(&eni_dev->rx_queue);
917 eni_dev->serv_read = eni_in(MID_SERV_WRITE);
918 eni_out(0,MID_DMA_WR_RX);
919 return 0;
920}
921
922
923/*----------------------------------- TX ------------------------------------*/
924
925
926enum enq_res { enq_ok,enq_next,enq_jam };
927
928
929static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr,
930 u32 size)
931{
932 u32 init,words;
933
934 DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size);
935 EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size);
936#if 0 /* don't complain anymore */
937 if (paddr & 3)
938 printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr);
939 if (size & 3)
940 printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size);
941#endif
942 if (paddr & 3) {
943 init = 4-(paddr & 3);
944 if (init > size || size < 7) init = size;
945 DPRINTK("put_dma: %lx DMA: %d/%d bytes\n",
946 (unsigned long) paddr,init,size);
947 dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) |
948 (chan << MID_DMA_CHAN_SHIFT);
949 dma[(*j)++] = paddr;
950 paddr += init;
951 size -= init;
952 }
953 words = size >> 2;
954 size &= 3;
955 if (words && (paddr & 31)) {
956 init = 8-((paddr & 31) >> 2);
957 if (init > words) init = words;
958 DPRINTK("put_dma: %lx DMA: %d/%d words\n",
959 (unsigned long) paddr,init,words);
960 dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
961 (chan << MID_DMA_CHAN_SHIFT);
962 dma[(*j)++] = paddr;
963 paddr += init << 2;
964 words -= init;
965 }
966#ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */
967 if (words & ~15) {
968 DPRINTK("put_dma: %lx DMA: %d*16/%d words\n",
969 (unsigned long) paddr,words >> 4,words);
970 dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT)
971 | (chan << MID_DMA_CHAN_SHIFT);
972 dma[(*j)++] = paddr;
973 paddr += (words & ~15) << 2;
974 words &= 15;
975 }
976#endif
977#ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */
978 if (words & ~7) {
979 DPRINTK("put_dma: %lx DMA: %d*8/%d words\n",
980 (unsigned long) paddr,words >> 3,words);
981 dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT)
982 | (chan << MID_DMA_CHAN_SHIFT);
983 dma[(*j)++] = paddr;
984 paddr += (words & ~7) << 2;
985 words &= 7;
986 }
987#endif
988#ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */
989 if (words & ~3) {
990 DPRINTK("put_dma: %lx DMA: %d*4/%d words\n",
991 (unsigned long) paddr,words >> 2,words);
992 dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT)
993 | (chan << MID_DMA_CHAN_SHIFT);
994 dma[(*j)++] = paddr;
995 paddr += (words & ~3) << 2;
996 words &= 3;
997 }
998#endif
999#ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */
1000 if (words & ~1) {
1001 DPRINTK("put_dma: %lx DMA: %d*2/%d words\n",
1002 (unsigned long) paddr,words >> 1,words);
1003 dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT)
1004 | (chan << MID_DMA_CHAN_SHIFT);
1005 dma[(*j)++] = paddr;
1006 paddr += (words & ~1) << 2;
1007 words &= 1;
1008 }
1009#endif
1010 if (words) {
1011 DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr,
1012 words);
1013 dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) |
1014 (chan << MID_DMA_CHAN_SHIFT);
1015 dma[(*j)++] = paddr;
1016 paddr += words << 2;
1017 }
1018 if (size) {
1019 DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr,
1020 size);
1021 dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) |
1022 (chan << MID_DMA_CHAN_SHIFT);
1023 dma[(*j)++] = paddr;
1024 }
1025}
1026
1027
1028static enum enq_res do_tx(struct sk_buff *skb)
1029{
1030 struct atm_vcc *vcc;
1031 struct eni_dev *eni_dev;
1032 struct eni_vcc *eni_vcc;
1033 struct eni_tx *tx;
1034 dma_addr_t paddr;
1035 u32 dma_rd,dma_wr;
1036 u32 size; /* in words */
1037 int aal5,dma_size,i,j;
1038
1039 DPRINTK(">do_tx\n");
1040 NULLCHECK(skb);
1041 EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len);
1042 vcc = ATM_SKB(skb)->vcc;
1043 NULLCHECK(vcc);
1044 eni_dev = ENI_DEV(vcc->dev);
1045 NULLCHECK(eni_dev);
1046 eni_vcc = ENI_VCC(vcc);
1047 tx = eni_vcc->tx;
1048 NULLCHECK(tx);
1049#if 0 /* Enable this for testing with the "align" program */
1050 {
1051 unsigned int hack = *((char *) skb->data)-'0';
1052
1053 if (hack < 8) {
1054 skb->data += hack;
1055 skb->len -= hack;
1056 }
1057 }
1058#endif
1059#if 0 /* should work now */
1060 if ((unsigned long) skb->data & 3)
1061 printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned "
1062 "TX data\n",vcc->dev->number,vcc->vci);
1063#endif
1064 /*
1065 * Potential future IP speedup: make hard_header big enough to put
1066 * segmentation descriptor directly into PDU. Saves: 4 slave writes,
1067 * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-)
1068 */
1069
1070 aal5 = vcc->qos.aal == ATM_AAL5;
1071 /* check space in buffer */
1072 if (!aal5)
1073 size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE;
1074 /* cell without HEC plus segmentation header (includes
1075 four-byte cell header) */
1076 else {
1077 size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1;
1078 /* add AAL5 trailer */
1079 size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE;
1080 /* add segmentation header */
1081 }
1082 /*
1083 * Can I move tx_pos by size bytes without getting closer than TX_GAP
1084 * to the read pointer ? TX_GAP means to leave some space for what
1085 * the manual calls "too close".
1086 */
1087 if (!NEPMOK(tx->tx_pos,size+TX_GAP,
1088 eni_in(MID_TX_RDPTR(tx->index)),tx->words)) {
1089 DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n",
1090 vcc->dev->number,size);
1091 return enq_next;
1092 }
1093 /* check DMA */
1094 dma_wr = eni_in(MID_DMA_WR_TX);
1095 dma_rd = eni_in(MID_DMA_RD_TX);
1096 dma_size = 3; /* JK for descriptor and final fill, plus final size
1097 mis-alignment fix */
1098DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags);
1099 if (!skb_shinfo(skb)->nr_frags) dma_size += 5;
1100 else dma_size += 5*(skb_shinfo(skb)->nr_frags+1);
1101 if (dma_size > TX_DMA_BUF) {
1102 printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries "
1103 "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF);
1104 }
1105 DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos);
1106 if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) <
1107 dma_size) {
1108 printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n",
1109 vcc->dev->number);
1110 return enq_jam;
1111 }
1112 paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len,
1113 PCI_DMA_TODEVICE);
1114 ENI_PRV_PADDR(skb) = paddr;
1115 /* prepare DMA queue entries */
1116 j = 0;
1117 eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) <<
1118 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1119 MID_DT_JK;
1120 j++;
1121 if (!skb_shinfo(skb)->nr_frags)
1122 if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len);
1123 else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4);
1124 else {
1125DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */
1126 for (i = -1; i < skb_shinfo(skb)->nr_frags; i++)
1127 if (i == -1)
1128 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1129 skb->data,
1130 skb_headlen(skb));
1131 else
1132 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1133 skb_frag_page(&skb_shinfo(skb)->frags[i]) +
1134 skb_shinfo(skb)->frags[i].page_offset,
1135 skb_frag_size(&skb_shinfo(skb)->frags[i]));
1136 }
1137 if (skb->len & 3) {
1138 put_dma(tx->index, eni_dev->dma, &j, eni_dev->zero.dma,
1139 4 - (skb->len & 3));
1140 }
1141 /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */
1142 eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) <<
1143 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1144 MID_DMA_END | MID_DT_JK;
1145 j++;
1146 DPRINTK("DMA at end: %d\n",j);
1147 /* store frame */
1148 writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) |
1149 (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) |
1150 (tx->resolution << MID_SEG_RATE_SHIFT) |
1151 (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4);
1152/*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/
1153 writel((vcc->vci << MID_SEG_VCI_SHIFT) |
1154 (aal5 ? 0 : (skb->data[3] & 0xf)) |
1155 (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0),
1156 tx->send+((tx->tx_pos+1) & (tx->words-1))*4);
1157 DPRINTK("size: %d, len:%d\n",size,skb->len);
1158 if (aal5)
1159 writel(skb->len,tx->send+
1160 ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4);
1161 j = j >> 1;
1162 for (i = 0; i < j; i++) {
1163 writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8);
1164 writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4);
1165 dma_wr = (dma_wr+1) & (NR_DMA_TX-1);
1166 }
1167 ENI_PRV_POS(skb) = tx->tx_pos;
1168 ENI_PRV_SIZE(skb) = size;
1169 ENI_VCC(vcc)->txing += size;
1170 tx->tx_pos = (tx->tx_pos+size) & (tx->words-1);
1171 DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos);
1172 eni_out(dma_wr,MID_DMA_WR_TX);
1173 skb_queue_tail(&eni_dev->tx_queue,skb);
1174queued++;
1175 return enq_ok;
1176}
1177
1178
1179static void poll_tx(struct atm_dev *dev)
1180{
1181 struct eni_tx *tx;
1182 struct sk_buff *skb;
1183 enum enq_res res;
1184 int i;
1185
1186 DPRINTK(">poll_tx\n");
1187 for (i = NR_CHAN-1; i >= 0; i--) {
1188 tx = &ENI_DEV(dev)->tx[i];
1189 if (tx->send)
1190 while ((skb = skb_dequeue(&tx->backlog))) {
1191 res = do_tx(skb);
1192 if (res == enq_ok) continue;
1193 DPRINTK("re-queuing TX PDU\n");
1194 skb_queue_head(&tx->backlog,skb);
1195requeued++;
1196 if (res == enq_jam) return;
1197 break;
1198 }
1199 }
1200}
1201
1202
1203static void dequeue_tx(struct atm_dev *dev)
1204{
1205 struct eni_dev *eni_dev;
1206 struct atm_vcc *vcc;
1207 struct sk_buff *skb;
1208 struct eni_tx *tx;
1209
1210 NULLCHECK(dev);
1211 eni_dev = ENI_DEV(dev);
1212 NULLCHECK(eni_dev);
1213 while ((skb = skb_dequeue(&eni_dev->tx_queue))) {
1214 vcc = ATM_SKB(skb)->vcc;
1215 NULLCHECK(vcc);
1216 tx = ENI_VCC(vcc)->tx;
1217 NULLCHECK(ENI_VCC(vcc)->tx);
1218 DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb),
1219 (unsigned) eni_in(MID_TX_DESCRSTART(tx->index)));
1220 if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) ==
1221 eni_in(MID_TX_DESCRSTART(tx->index))) {
1222 skb_queue_head(&eni_dev->tx_queue,skb);
1223 break;
1224 }
1225 ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb);
1226 pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len,
1227 PCI_DMA_TODEVICE);
1228 if (vcc->pop) vcc->pop(vcc,skb);
1229 else dev_kfree_skb_irq(skb);
1230 atomic_inc(&vcc->stats->tx);
1231 wake_up(&eni_dev->tx_wait);
1232dma_complete++;
1233 }
1234}
1235
1236
1237static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr)
1238{
1239 int i;
1240
1241 for (i = !ubr; i < NR_CHAN; i++)
1242 if (!eni_dev->tx[i].send) return eni_dev->tx+i;
1243 return NULL;
1244}
1245
1246
1247static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre,
1248 int *res,int unlimited)
1249{
1250 static const int pre_div[] = { 4,16,128,2048 };
1251 /* 2^(((x+2)^2-(x+2))/2+1) */
1252
1253 if (unlimited) *pre = *res = 0;
1254 else {
1255 if (*pcr > 0) {
1256 int div;
1257
1258 for (*pre = 0; *pre < 3; (*pre)++)
1259 if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break;
1260 div = pre_div[*pre]**pcr;
1261 DPRINTK("min div %d\n",div);
1262 *res = TS_CLOCK/div-1;
1263 }
1264 else {
1265 int div;
1266
1267 if (!*pcr) *pcr = eni_dev->tx_bw+reserved;
1268 for (*pre = 3; *pre >= 0; (*pre)--)
1269 if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break;
1270 if (*pre < 3) (*pre)++; /* else fail later */
1271 div = pre_div[*pre]*-*pcr;
1272 DPRINTK("max div %d\n",div);
1273 *res = DIV_ROUND_UP(TS_CLOCK, div)-1;
1274 }
1275 if (*res < 0) *res = 0;
1276 if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE;
1277 }
1278 *pcr = TS_CLOCK/pre_div[*pre]/(*res+1);
1279 DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res);
1280 return 0;
1281}
1282
1283
1284static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp,
1285 int set_rsv,int set_shp)
1286{
1287 struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1288 struct eni_vcc *eni_vcc = ENI_VCC(vcc);
1289 struct eni_tx *tx;
1290 unsigned long size;
1291 void __iomem *mem;
1292 int rate,ubr,unlimited,new_tx;
1293 int pre,res,order;
1294 int error;
1295
1296 rate = atm_pcr_goal(txtp);
1297 ubr = txtp->traffic_class == ATM_UBR;
1298 unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR ||
1299 rate >= ATM_OC3_PCR);
1300 if (!unlimited) {
1301 size = txtp->max_sdu*eni_dev->tx_mult/100;
1302 if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <=
1303 MID_MAX_BUF_SIZE)
1304 size = MID_MAX_BUF_SIZE;
1305 }
1306 else {
1307 if (eni_dev->ubr) {
1308 eni_vcc->tx = eni_dev->ubr;
1309 txtp->pcr = ATM_OC3_PCR;
1310 return 0;
1311 }
1312 size = UBR_BUFFER;
1313 }
1314 new_tx = !eni_vcc->tx;
1315 mem = NULL; /* for gcc */
1316 if (!new_tx) tx = eni_vcc->tx;
1317 else {
1318 mem = eni_alloc_mem(eni_dev,&size);
1319 if (!mem) return -ENOBUFS;
1320 tx = alloc_tx(eni_dev,unlimited);
1321 if (!tx) {
1322 eni_free_mem(eni_dev,mem,size);
1323 return -EBUSY;
1324 }
1325 DPRINTK("got chan %d\n",tx->index);
1326 tx->reserved = tx->shaping = 0;
1327 tx->send = mem;
1328 tx->words = size >> 2;
1329 skb_queue_head_init(&tx->backlog);
1330 for (order = 0; size > (1 << (order+10)); order++);
1331 eni_out((order << MID_SIZE_SHIFT) |
1332 ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)),
1333 MID_TX_PLACE(tx->index));
1334 tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) &
1335 MID_DESCR_START;
1336 }
1337 error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited);
1338 if (!error && txtp->min_pcr > rate) error = -EINVAL;
1339 if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR &&
1340 txtp->max_pcr < rate) error = -EINVAL;
1341 if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved)
1342 error = -EINVAL;
1343 if (!error && set_rsv && !set_shp && rate < tx->shaping)
1344 error = -EINVAL;
1345 if (!error && !set_rsv && rate > tx->reserved && !ubr)
1346 error = -EINVAL;
1347 if (error) {
1348 if (new_tx) {
1349 tx->send = NULL;
1350 eni_free_mem(eni_dev,mem,size);
1351 }
1352 return error;
1353 }
1354 txtp->pcr = rate;
1355 if (set_rsv && !ubr) {
1356 eni_dev->tx_bw += tx->reserved;
1357 tx->reserved = rate;
1358 eni_dev->tx_bw -= rate;
1359 }
1360 if (set_shp || (unlimited && new_tx)) {
1361 if (unlimited && new_tx) eni_dev->ubr = tx;
1362 tx->prescaler = pre;
1363 tx->resolution = res;
1364 tx->shaping = rate;
1365 }
1366 if (set_shp) eni_vcc->tx = tx;
1367 DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping);
1368 return 0;
1369}
1370
1371
1372static int open_tx_first(struct atm_vcc *vcc)
1373{
1374 ENI_VCC(vcc)->tx = NULL;
1375 if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0;
1376 ENI_VCC(vcc)->txing = 0;
1377 return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1);
1378}
1379
1380
1381static int open_tx_second(struct atm_vcc *vcc)
1382{
1383 return 0; /* nothing to do */
1384}
1385
1386
1387static void close_tx(struct atm_vcc *vcc)
1388{
1389 DECLARE_WAITQUEUE(wait,current);
1390 struct eni_dev *eni_dev;
1391 struct eni_vcc *eni_vcc;
1392
1393 eni_vcc = ENI_VCC(vcc);
1394 if (!eni_vcc->tx) return;
1395 eni_dev = ENI_DEV(vcc->dev);
1396 /* wait for TX queue to drain */
1397 DPRINTK("eni_close: waiting for TX ...\n");
1398 add_wait_queue(&eni_dev->tx_wait,&wait);
1399 set_current_state(TASK_UNINTERRUPTIBLE);
1400 for (;;) {
1401 int txing;
1402
1403 tasklet_disable(&eni_dev->task);
1404 txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing;
1405 tasklet_enable(&eni_dev->task);
1406 if (!txing) break;
1407 DPRINTK("%d TX left\n",eni_vcc->txing);
1408 schedule();
1409 set_current_state(TASK_UNINTERRUPTIBLE);
1410 }
1411 set_current_state(TASK_RUNNING);
1412 remove_wait_queue(&eni_dev->tx_wait,&wait);
1413 if (eni_vcc->tx != eni_dev->ubr) {
1414 /*
1415 * Looping a few times in here is probably far cheaper than
1416 * keeping track of TX completions all the time, so let's poll
1417 * a bit ...
1418 */
1419 while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) !=
1420 eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index)))
1421 schedule();
1422 eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2);
1423 eni_vcc->tx->send = NULL;
1424 eni_dev->tx_bw += eni_vcc->tx->reserved;
1425 }
1426 eni_vcc->tx = NULL;
1427}
1428
1429
1430static int start_tx(struct atm_dev *dev)
1431{
1432 struct eni_dev *eni_dev;
1433 int i;
1434
1435 eni_dev = ENI_DEV(dev);
1436 eni_dev->lost = 0;
1437 eni_dev->tx_bw = ATM_OC3_PCR;
1438 eni_dev->tx_mult = DEFAULT_TX_MULT;
1439 init_waitqueue_head(&eni_dev->tx_wait);
1440 eni_dev->ubr = NULL;
1441 skb_queue_head_init(&eni_dev->tx_queue);
1442 eni_out(0,MID_DMA_WR_TX);
1443 for (i = 0; i < NR_CHAN; i++) {
1444 eni_dev->tx[i].send = NULL;
1445 eni_dev->tx[i].index = i;
1446 }
1447 return 0;
1448}
1449
1450
1451/*--------------------------------- common ----------------------------------*/
1452
1453
1454#if 0 /* may become useful again when tuning things */
1455
1456static void foo(void)
1457{
1458printk(KERN_INFO
1459 "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n"
1460 "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n",
1461 tx_complete,dma_complete,queued,requeued,submitted,backlogged,
1462 rx_enqueued,rx_dequeued,putting,pushed);
1463if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost);
1464}
1465
1466#endif
1467
1468
1469static void bug_int(struct atm_dev *dev,unsigned long reason)
1470{
1471 DPRINTK(">bug_int\n");
1472 if (reason & MID_DMA_ERR_ACK)
1473 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1474 "error\n",dev->number);
1475 if (reason & MID_TX_IDENT_MISM)
1476 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident "
1477 "mismatch\n",dev->number);
1478 if (reason & MID_TX_DMA_OVFL)
1479 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1480 "overflow\n",dev->number);
1481 EVENT("---dump ends here---\n",0,0);
1482 printk(KERN_NOTICE "---recent events---\n");
1483 event_dump();
1484}
1485
1486
1487static irqreturn_t eni_int(int irq,void *dev_id)
1488{
1489 struct atm_dev *dev;
1490 struct eni_dev *eni_dev;
1491 u32 reason;
1492
1493 DPRINTK(">eni_int\n");
1494 dev = dev_id;
1495 eni_dev = ENI_DEV(dev);
1496 reason = eni_in(MID_ISA);
1497 DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason);
1498 /*
1499 * Must handle these two right now, because reading ISA doesn't clear
1500 * them, so they re-occur and we never make it to the tasklet. Since
1501 * they're rare, we don't mind the occasional invocation of eni_tasklet
1502 * with eni_dev->events == 0.
1503 */
1504 if (reason & MID_STAT_OVFL) {
1505 EVENT("stat overflow\n",0,0);
1506 eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH;
1507 }
1508 if (reason & MID_SUNI_INT) {
1509 EVENT("SUNI int\n",0,0);
1510 dev->phy->interrupt(dev);
1511#if 0
1512 foo();
1513#endif
1514 }
1515 spin_lock(&eni_dev->lock);
1516 eni_dev->events |= reason;
1517 spin_unlock(&eni_dev->lock);
1518 tasklet_schedule(&eni_dev->task);
1519 return IRQ_HANDLED;
1520}
1521
1522
1523static void eni_tasklet(unsigned long data)
1524{
1525 struct atm_dev *dev = (struct atm_dev *) data;
1526 struct eni_dev *eni_dev = ENI_DEV(dev);
1527 unsigned long flags;
1528 u32 events;
1529
1530 DPRINTK("eni_tasklet (dev %p)\n",dev);
1531 spin_lock_irqsave(&eni_dev->lock,flags);
1532 events = xchg(&eni_dev->events,0);
1533 spin_unlock_irqrestore(&eni_dev->lock,flags);
1534 if (events & MID_RX_DMA_COMPLETE) {
1535 EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0);
1536 dequeue_rx(dev);
1537 EVENT("dequeue_rx done, starting poll_rx\n",0,0);
1538 poll_rx(dev);
1539 EVENT("poll_rx done\n",0,0);
1540 /* poll_tx ? */
1541 }
1542 if (events & MID_SERVICE) {
1543 EVENT("INT: service, starting get_service\n",0,0);
1544 get_service(dev);
1545 EVENT("get_service done, starting poll_rx\n",0,0);
1546 poll_rx(dev);
1547 EVENT("poll_rx done\n",0,0);
1548 }
1549 if (events & MID_TX_DMA_COMPLETE) {
1550 EVENT("INT: TX DMA COMPLETE\n",0,0);
1551 dequeue_tx(dev);
1552 }
1553 if (events & MID_TX_COMPLETE) {
1554 EVENT("INT: TX COMPLETE\n",0,0);
1555tx_complete++;
1556 wake_up(&eni_dev->tx_wait);
1557 /* poll_rx ? */
1558 }
1559 if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) {
1560 EVENT("bug interrupt\n",0,0);
1561 bug_int(dev,events);
1562 }
1563 poll_tx(dev);
1564}
1565
1566
1567/*--------------------------------- entries ---------------------------------*/
1568
1569
1570static char * const media_name[] = {
1571 "MMF", "SMF", "MMF", "03?", /* 0- 3 */
1572 "UTP", "05?", "06?", "07?", /* 4- 7 */
1573 "TAXI","09?", "10?", "11?", /* 8-11 */
1574 "12?", "13?", "14?", "15?", /* 12-15 */
1575 "MMF", "SMF", "18?", "19?", /* 16-19 */
1576 "UTP", "21?", "22?", "23?", /* 20-23 */
1577 "24?", "25?", "26?", "27?", /* 24-27 */
1578 "28?", "29?", "30?", "31?" /* 28-31 */
1579};
1580
1581
1582#define SET_SEPROM \
1583 ({ if (!error && !pci_error) { \
1584 pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \
1585 udelay(10); /* 10 usecs */ \
1586 } })
1587#define GET_SEPROM \
1588 ({ if (!error && !pci_error) { \
1589 pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \
1590 udelay(10); /* 10 usecs */ \
1591 } })
1592
1593
1594static int get_esi_asic(struct atm_dev *dev)
1595{
1596 struct eni_dev *eni_dev;
1597 unsigned char tonga;
1598 int error,failed,pci_error;
1599 int address,i,j;
1600
1601 eni_dev = ENI_DEV(dev);
1602 error = pci_error = 0;
1603 tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK;
1604 SET_SEPROM;
1605 for (i = 0; i < ESI_LEN && !error && !pci_error; i++) {
1606 /* start operation */
1607 tonga |= SEPROM_DATA;
1608 SET_SEPROM;
1609 tonga |= SEPROM_CLK;
1610 SET_SEPROM;
1611 tonga &= ~SEPROM_DATA;
1612 SET_SEPROM;
1613 tonga &= ~SEPROM_CLK;
1614 SET_SEPROM;
1615 /* send address */
1616 address = ((i+SEPROM_ESI_BASE) << 1)+1;
1617 for (j = 7; j >= 0; j--) {
1618 tonga = (address >> j) & 1 ? tonga | SEPROM_DATA :
1619 tonga & ~SEPROM_DATA;
1620 SET_SEPROM;
1621 tonga |= SEPROM_CLK;
1622 SET_SEPROM;
1623 tonga &= ~SEPROM_CLK;
1624 SET_SEPROM;
1625 }
1626 /* get ack */
1627 tonga |= SEPROM_DATA;
1628 SET_SEPROM;
1629 tonga |= SEPROM_CLK;
1630 SET_SEPROM;
1631 GET_SEPROM;
1632 failed = tonga & SEPROM_DATA;
1633 tonga &= ~SEPROM_CLK;
1634 SET_SEPROM;
1635 tonga |= SEPROM_DATA;
1636 SET_SEPROM;
1637 if (failed) error = -EIO;
1638 else {
1639 dev->esi[i] = 0;
1640 for (j = 7; j >= 0; j--) {
1641 dev->esi[i] <<= 1;
1642 tonga |= SEPROM_DATA;
1643 SET_SEPROM;
1644 tonga |= SEPROM_CLK;
1645 SET_SEPROM;
1646 GET_SEPROM;
1647 if (tonga & SEPROM_DATA) dev->esi[i] |= 1;
1648 tonga &= ~SEPROM_CLK;
1649 SET_SEPROM;
1650 tonga |= SEPROM_DATA;
1651 SET_SEPROM;
1652 }
1653 /* get ack */
1654 tonga |= SEPROM_DATA;
1655 SET_SEPROM;
1656 tonga |= SEPROM_CLK;
1657 SET_SEPROM;
1658 GET_SEPROM;
1659 if (!(tonga & SEPROM_DATA)) error = -EIO;
1660 tonga &= ~SEPROM_CLK;
1661 SET_SEPROM;
1662 tonga |= SEPROM_DATA;
1663 SET_SEPROM;
1664 }
1665 /* stop operation */
1666 tonga &= ~SEPROM_DATA;
1667 SET_SEPROM;
1668 tonga |= SEPROM_CLK;
1669 SET_SEPROM;
1670 tonga |= SEPROM_DATA;
1671 SET_SEPROM;
1672 }
1673 if (pci_error) {
1674 printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI "
1675 "(0x%02x)\n",dev->number,pci_error);
1676 error = -EIO;
1677 }
1678 return error;
1679}
1680
1681
1682#undef SET_SEPROM
1683#undef GET_SEPROM
1684
1685
1686static int get_esi_fpga(struct atm_dev *dev, void __iomem *base)
1687{
1688 void __iomem *mac_base;
1689 int i;
1690
1691 mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom);
1692 for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3));
1693 return 0;
1694}
1695
1696
1697static int eni_do_init(struct atm_dev *dev)
1698{
1699 struct midway_eprom __iomem *eprom;
1700 struct eni_dev *eni_dev;
1701 struct pci_dev *pci_dev;
1702 unsigned long real_base;
1703 void __iomem *base;
1704 int error,i,last;
1705
1706 DPRINTK(">eni_init\n");
1707 dev->ci_range.vpi_bits = 0;
1708 dev->ci_range.vci_bits = NR_VCI_LD;
1709 dev->link_rate = ATM_OC3_PCR;
1710 eni_dev = ENI_DEV(dev);
1711 pci_dev = eni_dev->pci_dev;
1712 real_base = pci_resource_start(pci_dev, 0);
1713 eni_dev->irq = pci_dev->irq;
1714 if ((error = pci_write_config_word(pci_dev,PCI_COMMAND,
1715 PCI_COMMAND_MEMORY |
1716 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1717 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory "
1718 "(0x%02x)\n",dev->number,error);
1719 return -EIO;
1720 }
1721 printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,",
1722 dev->number,pci_dev->revision,real_base,eni_dev->irq);
1723 if (!(base = ioremap_nocache(real_base,MAP_MAX_SIZE))) {
1724 printk("\n");
1725 printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page "
1726 "mapping\n",dev->number);
1727 return error;
1728 }
1729 eni_dev->ioaddr = base;
1730 eni_dev->base_diff = real_base - (unsigned long) base;
1731 /* id may not be present in ASIC Tonga boards - check this @@@ */
1732 if (!eni_dev->asic) {
1733 eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom));
1734 if (readl(&eprom->magic) != ENI155_MAGIC) {
1735 printk("\n");
1736 printk(KERN_ERR DEV_LABEL
1737 "(itf %d): bad magic - expected 0x%x, got 0x%x\n",
1738 dev->number, ENI155_MAGIC,
1739 (unsigned)readl(&eprom->magic));
1740 error = -EINVAL;
1741 goto unmap;
1742 }
1743 }
1744 eni_dev->phy = base+PHY_BASE;
1745 eni_dev->reg = base+REG_BASE;
1746 eni_dev->ram = base+RAM_BASE;
1747 last = MAP_MAX_SIZE-RAM_BASE;
1748 for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) {
1749 writel(0x55555555,eni_dev->ram+i);
1750 if (readl(eni_dev->ram+i) != 0x55555555) last = i;
1751 else {
1752 writel(0xAAAAAAAA,eni_dev->ram+i);
1753 if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i;
1754 else writel(i,eni_dev->ram+i);
1755 }
1756 }
1757 for (i = 0; i < last; i += RAM_INCREMENT)
1758 if (readl(eni_dev->ram+i) != i) break;
1759 eni_dev->mem = i;
1760 memset_io(eni_dev->ram,0,eni_dev->mem);
1761 /* TODO: should shrink allocation now */
1762 printk("mem=%dkB (",eni_dev->mem >> 10);
1763 /* TODO: check for non-SUNI, check for TAXI ? */
1764 if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) {
1765 printk(")\n");
1766 printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n",
1767 dev->number,(unsigned) eni_in(MID_RES_ID_MCON));
1768 error = -EINVAL;
1769 goto unmap;
1770 }
1771 error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base);
1772 if (error)
1773 goto unmap;
1774 for (i = 0; i < ESI_LEN; i++)
1775 printk("%s%02X",i ? "-" : "",dev->esi[i]);
1776 printk(")\n");
1777 printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number,
1778 eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA",
1779 media_name[eni_in(MID_RES_ID_MCON) & DAUGTHER_ID]);
1780
1781 error = suni_init(dev);
1782 if (error)
1783 goto unmap;
1784out:
1785 return error;
1786unmap:
1787 iounmap(base);
1788 goto out;
1789}
1790
1791static void eni_do_release(struct atm_dev *dev)
1792{
1793 struct eni_dev *ed = ENI_DEV(dev);
1794
1795 dev->phy->stop(dev);
1796 dev->phy = NULL;
1797 iounmap(ed->ioaddr);
1798}
1799
1800static int eni_start(struct atm_dev *dev)
1801{
1802 struct eni_dev *eni_dev;
1803
1804 void __iomem *buf;
1805 unsigned long buffer_mem;
1806 int error;
1807
1808 DPRINTK(">eni_start\n");
1809 eni_dev = ENI_DEV(dev);
1810 if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) {
1811 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
1812 dev->number,eni_dev->irq);
1813 error = -EAGAIN;
1814 goto out;
1815 }
1816 pci_set_master(eni_dev->pci_dev);
1817 if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND,
1818 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
1819 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1820 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+"
1821 "master (0x%02x)\n",dev->number,error);
1822 goto free_irq;
1823 }
1824 if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,
1825 END_SWAP_DMA))) {
1826 printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap "
1827 "(0x%02x)\n",dev->number,error);
1828 goto free_irq;
1829 }
1830 /* determine addresses of internal tables */
1831 eni_dev->vci = eni_dev->ram;
1832 eni_dev->rx_dma = eni_dev->ram+NR_VCI*16;
1833 eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8;
1834 eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8;
1835 buf = eni_dev->service+NR_SERVICE*4;
1836 DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n",
1837 eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma,
1838 eni_dev->service,buf);
1839 spin_lock_init(&eni_dev->lock);
1840 tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev);
1841 eni_dev->events = 0;
1842 /* initialize memory management */
1843 buffer_mem = eni_dev->mem - (buf - eni_dev->ram);
1844 eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2;
1845 eni_dev->free_list = kmalloc(
1846 sizeof(struct eni_free)*(eni_dev->free_list_size+1),GFP_KERNEL);
1847 if (!eni_dev->free_list) {
1848 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
1849 dev->number);
1850 error = -ENOMEM;
1851 goto free_irq;
1852 }
1853 eni_dev->free_len = 0;
1854 eni_put_free(eni_dev,buf,buffer_mem);
1855 memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */
1856 /*
1857 * byte_addr free (k)
1858 * 0x00000000 512 VCI table
1859 * 0x00004000 496 RX DMA
1860 * 0x00005000 492 TX DMA
1861 * 0x00006000 488 service list
1862 * 0x00007000 484 buffers
1863 * 0x00080000 0 end (512kB)
1864 */
1865 eni_out(0xffffffff,MID_IE);
1866 error = start_tx(dev);
1867 if (error) goto free_list;
1868 error = start_rx(dev);
1869 if (error) goto free_list;
1870 error = dev->phy->start(dev);
1871 if (error) goto free_list;
1872 eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) |
1873 MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE,
1874 MID_MC_S);
1875 /* Tonga uses SBus INTReq1 */
1876 (void) eni_in(MID_ISA); /* clear Midway interrupts */
1877 return 0;
1878
1879free_list:
1880 kfree(eni_dev->free_list);
1881
1882free_irq:
1883 free_irq(eni_dev->irq, dev);
1884
1885out:
1886 return error;
1887}
1888
1889
1890static void eni_close(struct atm_vcc *vcc)
1891{
1892 DPRINTK(">eni_close\n");
1893 if (!ENI_VCC(vcc)) return;
1894 clear_bit(ATM_VF_READY,&vcc->flags);
1895 close_rx(vcc);
1896 close_tx(vcc);
1897 DPRINTK("eni_close: done waiting\n");
1898 /* deallocate memory */
1899 kfree(ENI_VCC(vcc));
1900 vcc->dev_data = NULL;
1901 clear_bit(ATM_VF_ADDR,&vcc->flags);
1902 /*foo();*/
1903}
1904
1905
1906static int eni_open(struct atm_vcc *vcc)
1907{
1908 struct eni_vcc *eni_vcc;
1909 int error;
1910 short vpi = vcc->vpi;
1911 int vci = vcc->vci;
1912
1913 DPRINTK(">eni_open\n");
1914 EVENT("eni_open\n",0,0);
1915 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1916 vcc->dev_data = NULL;
1917 if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
1918 set_bit(ATM_VF_ADDR,&vcc->flags);
1919 if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5)
1920 return -EINVAL;
1921 DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi,
1922 vcc->vci);
1923 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
1924 eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL);
1925 if (!eni_vcc) return -ENOMEM;
1926 vcc->dev_data = eni_vcc;
1927 eni_vcc->tx = NULL; /* for eni_close after open_rx */
1928 if ((error = open_rx_first(vcc))) {
1929 eni_close(vcc);
1930 return error;
1931 }
1932 if ((error = open_tx_first(vcc))) {
1933 eni_close(vcc);
1934 return error;
1935 }
1936 }
1937 if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0;
1938 if ((error = open_rx_second(vcc))) {
1939 eni_close(vcc);
1940 return error;
1941 }
1942 if ((error = open_tx_second(vcc))) {
1943 eni_close(vcc);
1944 return error;
1945 }
1946 set_bit(ATM_VF_READY,&vcc->flags);
1947 /* should power down SUNI while !ref_count @@@ */
1948 return 0;
1949}
1950
1951
1952static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs)
1953{
1954 struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1955 struct eni_tx *tx = ENI_VCC(vcc)->tx;
1956 struct sk_buff *skb;
1957 int error,rate,rsv,shp;
1958
1959 if (qos->txtp.traffic_class == ATM_NONE) return 0;
1960 if (tx == eni_dev->ubr) return -EBADFD;
1961 rate = atm_pcr_goal(&qos->txtp);
1962 if (rate < 0) rate = -rate;
1963 rsv = shp = 0;
1964 if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1;
1965 if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1;
1966 if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1;
1967 if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1;
1968 if (!rsv && !shp) return 0;
1969 error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp);
1970 if (error) return error;
1971 if (shp && !(flgs & ATM_MF_IMMED)) return 0;
1972 /*
1973 * Walk through the send buffer and patch the rate information in all
1974 * segmentation buffer descriptors of this VCC.
1975 */
1976 tasklet_disable(&eni_dev->task);
1977 skb_queue_walk(&eni_dev->tx_queue, skb) {
1978 void __iomem *dsc;
1979
1980 if (ATM_SKB(skb)->vcc != vcc) continue;
1981 dsc = tx->send+ENI_PRV_POS(skb)*4;
1982 writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) |
1983 (tx->prescaler << MID_SEG_PR_SHIFT) |
1984 (tx->resolution << MID_SEG_RATE_SHIFT), dsc);
1985 }
1986 tasklet_enable(&eni_dev->task);
1987 return 0;
1988}
1989
1990
1991static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
1992{
1993 struct eni_dev *eni_dev = ENI_DEV(dev);
1994
1995 if (cmd == ENI_MEMDUMP) {
1996 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1997 printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d "
1998 "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number);
1999 dump(dev);
2000 return 0;
2001 }
2002 if (cmd == ENI_SETMULT) {
2003 struct eni_multipliers mult;
2004
2005 if (!capable(CAP_NET_ADMIN)) return -EPERM;
2006 if (copy_from_user(&mult, arg,
2007 sizeof(struct eni_multipliers)))
2008 return -EFAULT;
2009 if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) ||
2010 mult.tx > 65536 || mult.rx > 65536)
2011 return -EINVAL;
2012 if (mult.tx) eni_dev->tx_mult = mult.tx;
2013 if (mult.rx) eni_dev->rx_mult = mult.rx;
2014 return 0;
2015 }
2016 if (cmd == ATM_SETCIRANGE) {
2017 struct atm_cirange ci;
2018
2019 if (copy_from_user(&ci, arg,sizeof(struct atm_cirange)))
2020 return -EFAULT;
2021 if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) &&
2022 (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX))
2023 return 0;
2024 return -EINVAL;
2025 }
2026 if (!dev->phy->ioctl) return -ENOIOCTLCMD;
2027 return dev->phy->ioctl(dev,cmd,arg);
2028}
2029
2030
2031static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname,
2032 void __user *optval,int optlen)
2033{
2034 return -EINVAL;
2035}
2036
2037
2038static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname,
2039 void __user *optval,unsigned int optlen)
2040{
2041 return -EINVAL;
2042}
2043
2044
2045static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb)
2046{
2047 enum enq_res res;
2048
2049 DPRINTK(">eni_send\n");
2050 if (!ENI_VCC(vcc)->tx) {
2051 if (vcc->pop) vcc->pop(vcc,skb);
2052 else dev_kfree_skb(skb);
2053 return -EINVAL;
2054 }
2055 if (!skb) {
2056 printk(KERN_CRIT "!skb in eni_send ?\n");
2057 if (vcc->pop) vcc->pop(vcc,skb);
2058 return -EINVAL;
2059 }
2060 if (vcc->qos.aal == ATM_AAL0) {
2061 if (skb->len != ATM_CELL_SIZE-1) {
2062 if (vcc->pop) vcc->pop(vcc,skb);
2063 else dev_kfree_skb(skb);
2064 return -EINVAL;
2065 }
2066 *(u32 *) skb->data = htonl(*(u32 *) skb->data);
2067 }
2068submitted++;
2069 ATM_SKB(skb)->vcc = vcc;
2070 tasklet_disable(&ENI_DEV(vcc->dev)->task);
2071 res = do_tx(skb);
2072 tasklet_enable(&ENI_DEV(vcc->dev)->task);
2073 if (res == enq_ok) return 0;
2074 skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb);
2075backlogged++;
2076 tasklet_schedule(&ENI_DEV(vcc->dev)->task);
2077 return 0;
2078}
2079
2080static void eni_phy_put(struct atm_dev *dev,unsigned char value,
2081 unsigned long addr)
2082{
2083 writel(value,ENI_DEV(dev)->phy+addr*4);
2084}
2085
2086
2087
2088static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr)
2089{
2090 return readl(ENI_DEV(dev)->phy+addr*4);
2091}
2092
2093
2094static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page)
2095{
2096 struct 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%ld-0x%ld "
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%ld-0x%ld "
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
2214static 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
2228static 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 = -ENOMEM;
2241 eni_dev = kmalloc(sizeof(struct eni_dev), GFP_KERNEL);
2242 if (!eni_dev)
2243 goto err_disable;
2244
2245 zero = &eni_dev->zero;
2246 zero->addr = pci_alloc_consistent(pci_dev, ENI_ZEROES_SIZE, &zero->dma);
2247 if (!zero->addr)
2248 goto err_kfree;
2249
2250 dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL);
2251 if (!dev)
2252 goto err_free_consistent;
2253
2254 dev->dev_data = eni_dev;
2255 pci_set_drvdata(pci_dev, dev);
2256 eni_dev->pci_dev = pci_dev;
2257 eni_dev->asic = ent->driver_data;
2258
2259 rc = eni_do_init(dev);
2260 if (rc < 0)
2261 goto err_unregister;
2262
2263 rc = eni_start(dev);
2264 if (rc < 0)
2265 goto err_eni_release;
2266
2267 eni_dev->more = eni_boards;
2268 eni_boards = dev;
2269out:
2270 return rc;
2271
2272err_eni_release:
2273 eni_do_release(dev);
2274err_unregister:
2275 atm_dev_deregister(dev);
2276err_free_consistent:
2277 pci_free_consistent(pci_dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2278err_kfree:
2279 kfree(eni_dev);
2280err_disable:
2281 pci_disable_device(pci_dev);
2282 goto out;
2283}
2284
2285
2286static struct pci_device_id eni_pci_tbl[] = {
2287 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_FPGA), 0 /* FPGA */ },
2288 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_ASIC), 1 /* ASIC */ },
2289 { 0, }
2290};
2291MODULE_DEVICE_TABLE(pci,eni_pci_tbl);
2292
2293
2294static void eni_remove_one(struct pci_dev *pdev)
2295{
2296 struct atm_dev *dev = pci_get_drvdata(pdev);
2297 struct eni_dev *ed = ENI_DEV(dev);
2298 struct eni_zero *zero = &ed->zero;
2299
2300 eni_do_release(dev);
2301 atm_dev_deregister(dev);
2302 pci_free_consistent(pdev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2303 kfree(ed);
2304 pci_disable_device(pdev);
2305}
2306
2307
2308static struct pci_driver eni_driver = {
2309 .name = DEV_LABEL,
2310 .id_table = eni_pci_tbl,
2311 .probe = eni_init_one,
2312 .remove = eni_remove_one,
2313};
2314
2315
2316static int __init eni_init(void)
2317{
2318 struct sk_buff *skb; /* dummy for sizeof */
2319
2320 if (sizeof(skb->cb) < sizeof(struct eni_skb_prv)) {
2321 printk(KERN_ERR "eni_detect: skb->cb is too small (%Zd < %Zd)\n",
2322 sizeof(skb->cb),sizeof(struct eni_skb_prv));
2323 return -EIO;
2324 }
2325 return pci_register_driver(&eni_driver);
2326}
2327
2328
2329module_init(eni_init);
2330/* @@@ since exit routine not defined, this module can not be unloaded */
2331
2332MODULE_LICENSE("GPL");