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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// 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#if !defined(__i386__) && !defined(__x86_64__)
35#ifndef ioremap_nocache
36#define ioremap_nocache(X,Y) ioremap(X,Y)
37#endif
38#endif
39
40/*
41 * TODO:
42 *
43 * Show stoppers
44 * none
45 *
46 * Minor
47 * - OAM support
48 * - fix bugs listed below
49 */
50
51/*
52 * KNOWN BUGS:
53 *
54 * - may run into JK-JK bug and deadlock
55 * - should allocate UBR channel first
56 * - buffer space allocation algorithm is stupid
57 * (RX: should be maxSDU+maxdelay*rate
58 * TX: should be maxSDU+min(maxSDU,maxdelay*rate) )
59 * - doesn't support OAM cells
60 * - eni_put_free may hang if not putting memory fragments that _complete_
61 * 2^n block (never happens in real life, though)
62 */
63
64
65#if 0
66#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
67#else
68#define DPRINTK(format,args...)
69#endif
70
71
72#ifndef CONFIG_ATM_ENI_TUNE_BURST
73#define CONFIG_ATM_ENI_BURST_TX_8W
74#define CONFIG_ATM_ENI_BURST_RX_4W
75#endif
76
77
78#ifndef CONFIG_ATM_ENI_DEBUG
79
80
81#define NULLCHECK(x)
82
83#define EVENT(s,a,b)
84
85
86static void event_dump(void)
87{
88}
89
90
91#else
92
93
94/*
95 * NULL pointer checking
96 */
97
98#define NULLCHECK(x) \
99 if ((unsigned long) (x) < 0x30) \
100 printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x))
101
102/*
103 * Very extensive activity logging. Greatly improves bug detection speed but
104 * costs a few Mbps if enabled.
105 */
106
107#define EV 64
108
109static const char *ev[EV];
110static unsigned long ev_a[EV],ev_b[EV];
111static int ec = 0;
112
113
114static void EVENT(const char *s,unsigned long a,unsigned long b)
115{
116 ev[ec] = s;
117 ev_a[ec] = a;
118 ev_b[ec] = b;
119 ec = (ec+1) % EV;
120}
121
122
123static void event_dump(void)
124{
125 int n,i;
126
127 for (n = 0; n < EV; n++) {
128 i = (ec+n) % EV;
129 printk(KERN_NOTICE);
130 printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]);
131 }
132}
133
134
135#endif /* CONFIG_ATM_ENI_DEBUG */
136
137
138/*
139 * NExx must not be equal at end
140 * EExx may be equal at end
141 * xxPJOK verify validity of pointer jumps
142 * xxPMOK operating on a circular buffer of "c" words
143 */
144
145#define NEPJOK(a0,a1,b) \
146 ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1))
147#define EEPJOK(a0,a1,b) \
148 ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1))
149#define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b)
150#define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b)
151
152
153static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0,
154 backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0,
155 putting = 0;
156
157static struct atm_dev *eni_boards = NULL;
158
159/* Read/write registers on card */
160#define eni_in(r) readl(eni_dev->reg+(r)*4)
161#define eni_out(v,r) writel((v),eni_dev->reg+(r)*4)
162
163
164/*-------------------------------- utilities --------------------------------*/
165
166
167static void dump_mem(struct eni_dev *eni_dev)
168{
169 int i;
170
171 for (i = 0; i < eni_dev->free_len; i++)
172 printk(KERN_DEBUG " %d: %p %d\n",i,
173 eni_dev->free_list[i].start,
174 1 << eni_dev->free_list[i].order);
175}
176
177
178static void dump(struct atm_dev *dev)
179{
180 struct eni_dev *eni_dev;
181
182 int i;
183
184 eni_dev = ENI_DEV(dev);
185 printk(KERN_NOTICE "Free memory\n");
186 dump_mem(eni_dev);
187 printk(KERN_NOTICE "TX buffers\n");
188 for (i = 0; i < NR_CHAN; i++)
189 if (eni_dev->tx[i].send)
190 printk(KERN_NOTICE " TX %d @ %p: %ld\n",i,
191 eni_dev->tx[i].send,eni_dev->tx[i].words*4);
192 printk(KERN_NOTICE "RX buffers\n");
193 for (i = 0; i < 1024; i++)
194 if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx)
195 printk(KERN_NOTICE " RX %d @ %p: %ld\n",i,
196 ENI_VCC(eni_dev->rx_map[i])->recv,
197 ENI_VCC(eni_dev->rx_map[i])->words*4);
198 printk(KERN_NOTICE "----\n");
199}
200
201
202static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start,
203 unsigned long size)
204{
205 struct eni_free *list;
206 int len,order;
207
208 DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size);
209 start += eni_dev->base_diff;
210 list = eni_dev->free_list;
211 len = eni_dev->free_len;
212 while (size) {
213 if (len >= eni_dev->free_list_size) {
214 printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n",
215 start,size);
216 break;
217 }
218 for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++);
219 if (MID_MIN_BUF_SIZE > (1 << order)) {
220 printk(KERN_CRIT "eni_put_free: order %d too small\n",
221 order);
222 break;
223 }
224 list[len].start = (void __iomem *) start;
225 list[len].order = order;
226 len++;
227 start += 1 << order;
228 size -= 1 << order;
229 }
230 eni_dev->free_len = len;
231 /*dump_mem(eni_dev);*/
232}
233
234
235static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size)
236{
237 struct eni_free *list;
238 void __iomem *start;
239 int len,i,order,best_order,index;
240
241 list = eni_dev->free_list;
242 len = eni_dev->free_len;
243 if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE;
244 if (*size > MID_MAX_BUF_SIZE) return NULL;
245 for (order = 0; (1 << order) < *size; order++)
246 ;
247 DPRINTK("trying: %ld->%d\n",*size,order);
248 best_order = 65; /* we don't have more than 2^64 of anything ... */
249 index = 0; /* silence GCC */
250 for (i = 0; i < len; i++)
251 if (list[i].order == order) {
252 best_order = order;
253 index = i;
254 break;
255 }
256 else if (best_order > list[i].order && list[i].order > order) {
257 best_order = list[i].order;
258 index = i;
259 }
260 if (best_order == 65) return NULL;
261 start = list[index].start-eni_dev->base_diff;
262 list[index] = list[--len];
263 eni_dev->free_len = len;
264 *size = 1 << order;
265 eni_put_free(eni_dev,start+*size,(1 << best_order)-*size);
266 DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start);
267 memset_io(start,0,*size); /* never leak data */
268 /*dump_mem(eni_dev);*/
269 return start;
270}
271
272
273static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start,
274 unsigned long size)
275{
276 struct eni_free *list;
277 int len,i,order;
278
279 start += eni_dev->base_diff;
280 list = eni_dev->free_list;
281 len = eni_dev->free_len;
282 for (order = -1; size; order++) size >>= 1;
283 DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order);
284 for (i = 0; i < len; i++)
285 if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) &&
286 list[i].order == order) {
287 DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i,
288 list[i].start,start,1 << order,list[i].order,order);
289 list[i] = list[--len];
290 start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order));
291 order++;
292 i = -1;
293 continue;
294 }
295 if (len >= eni_dev->free_list_size) {
296 printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start,
297 order);
298 return;
299 }
300 list[len].start = start;
301 list[len].order = order;
302 eni_dev->free_len = len+1;
303 /*dump_mem(eni_dev);*/
304}
305
306
307/*----------------------------------- RX ------------------------------------*/
308
309
310#define ENI_VCC_NOS ((struct atm_vcc *) 1)
311
312
313static void rx_ident_err(struct atm_vcc *vcc)
314{
315 struct atm_dev *dev;
316 struct eni_dev *eni_dev;
317 struct eni_vcc *eni_vcc;
318
319 dev = vcc->dev;
320 eni_dev = ENI_DEV(dev);
321 /* immediately halt adapter */
322 eni_out(eni_in(MID_MC_S) &
323 ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S);
324 /* dump useful information */
325 eni_vcc = ENI_VCC(vcc);
326 printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident "
327 "mismatch\n",dev->number);
328 printk(KERN_ALERT " VCI %d, rxing %d, words %ld\n",vcc->vci,
329 eni_vcc->rxing,eni_vcc->words);
330 printk(KERN_ALERT " host descr 0x%lx, rx pos 0x%lx, descr value "
331 "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos,
332 (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4));
333 printk(KERN_ALERT " last %p, servicing %d\n",eni_vcc->last,
334 eni_vcc->servicing);
335 EVENT("---dump ends here---\n",0,0);
336 printk(KERN_NOTICE "---recent events---\n");
337 event_dump();
338 ENI_DEV(dev)->fast = NULL; /* really stop it */
339 ENI_DEV(dev)->slow = NULL;
340 skb_queue_head_init(&ENI_DEV(dev)->rx_queue);
341}
342
343
344static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb,
345 unsigned long skip,unsigned long size,unsigned long eff)
346{
347 struct eni_dev *eni_dev;
348 struct eni_vcc *eni_vcc;
349 u32 dma_rd,dma_wr;
350 u32 dma[RX_DMA_BUF*2];
351 dma_addr_t paddr;
352 unsigned long here;
353 int i,j;
354
355 eni_dev = ENI_DEV(vcc->dev);
356 eni_vcc = ENI_VCC(vcc);
357 paddr = 0; /* GCC, shut up */
358 if (skb) {
359 paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len,
360 DMA_FROM_DEVICE);
361 if (dma_mapping_error(&eni_dev->pci_dev->dev, paddr))
362 goto dma_map_error;
363 ENI_PRV_PADDR(skb) = paddr;
364 if (paddr & 3)
365 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has "
366 "mis-aligned RX data (0x%lx)\n",vcc->dev->number,
367 vcc->vci,(unsigned long) paddr);
368 ENI_PRV_SIZE(skb) = size+skip;
369 /* PDU plus descriptor */
370 ATM_SKB(skb)->vcc = vcc;
371 }
372 j = 0;
373 if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */
374 here = (eni_vcc->descr+skip) & (eni_vcc->words-1);
375 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci
376 << MID_DMA_VCI_SHIFT) | MID_DT_JK;
377 j++;
378 }
379 here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1);
380 if (!eff) size += skip;
381 else {
382 unsigned long words;
383
384 if (!size) {
385 DPRINTK("strange things happen ...\n");
386 EVENT("strange things happen ... (skip=%ld,eff=%ld)\n",
387 size,eff);
388 }
389 words = eff;
390 if (paddr & 15) {
391 unsigned long init;
392
393 init = 4-((paddr & 15) >> 2);
394 if (init > words) init = words;
395 dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
396 (vcc->vci << MID_DMA_VCI_SHIFT);
397 dma[j++] = paddr;
398 paddr += init << 2;
399 words -= init;
400 }
401#ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */
402 if (words & ~15) {
403 dma[j++] = MID_DT_16W | ((words >> 4) <<
404 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
405 MID_DMA_VCI_SHIFT);
406 dma[j++] = paddr;
407 paddr += (words & ~15) << 2;
408 words &= 15;
409 }
410#endif
411#ifdef CONFIG_ATM_ENI_BURST_RX_8W /* works only with *some* PCI chipsets ... */
412 if (words & ~7) {
413 dma[j++] = MID_DT_8W | ((words >> 3) <<
414 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
415 MID_DMA_VCI_SHIFT);
416 dma[j++] = paddr;
417 paddr += (words & ~7) << 2;
418 words &= 7;
419 }
420#endif
421#ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */
422 if (words & ~3) {
423 dma[j++] = MID_DT_4W | ((words >> 2) <<
424 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
425 MID_DMA_VCI_SHIFT);
426 dma[j++] = paddr;
427 paddr += (words & ~3) << 2;
428 words &= 3;
429 }
430#endif
431#ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */
432 if (words & ~1) {
433 dma[j++] = MID_DT_2W | ((words >> 1) <<
434 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
435 MID_DMA_VCI_SHIFT);
436 dma[j++] = paddr;
437 paddr += (words & ~1) << 2;
438 words &= 1;
439 }
440#endif
441 if (words) {
442 dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT)
443 | (vcc->vci << MID_DMA_VCI_SHIFT);
444 dma[j++] = paddr;
445 }
446 }
447 if (size != eff) {
448 dma[j++] = (here << MID_DMA_COUNT_SHIFT) |
449 (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK;
450 j++;
451 }
452 if (!j || j > 2*RX_DMA_BUF) {
453 printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n");
454 goto trouble;
455 }
456 dma[j-2] |= MID_DMA_END;
457 j = j >> 1;
458 dma_wr = eni_in(MID_DMA_WR_RX);
459 dma_rd = eni_in(MID_DMA_RD_RX);
460 /*
461 * Can I move the dma_wr pointer by 2j+1 positions without overwriting
462 * data that hasn't been read (position of dma_rd) yet ?
463 */
464 if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */
465 printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n",
466 vcc->dev->number);
467 goto trouble;
468 }
469 for (i = 0; i < j; i++) {
470 writel(dma[i*2],eni_dev->rx_dma+dma_wr*8);
471 writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4);
472 dma_wr = (dma_wr+1) & (NR_DMA_RX-1);
473 }
474 if (skb) {
475 ENI_PRV_POS(skb) = eni_vcc->descr+size+1;
476 skb_queue_tail(&eni_dev->rx_queue,skb);
477 eni_vcc->last = skb;
478 rx_enqueued++;
479 }
480 eni_vcc->descr = here;
481 eni_out(dma_wr,MID_DMA_WR_RX);
482 return 0;
483
484trouble:
485 if (paddr)
486 dma_unmap_single(&eni_dev->pci_dev->dev,paddr,skb->len,
487 DMA_FROM_DEVICE);
488dma_map_error:
489 if (skb) dev_kfree_skb_irq(skb);
490 return -1;
491}
492
493
494static void discard(struct atm_vcc *vcc,unsigned long size)
495{
496 struct eni_vcc *eni_vcc;
497
498 eni_vcc = ENI_VCC(vcc);
499 EVENT("discard (size=%ld)\n",size,0);
500 while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0);
501 /* could do a full fallback, but that might be more expensive */
502 if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1;
503 else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1);
504}
505
506
507/*
508 * TODO: should check whether direct copies (without DMA setup, dequeuing on
509 * interrupt, etc.) aren't much faster for AAL0
510 */
511
512static int rx_aal0(struct atm_vcc *vcc)
513{
514 struct eni_vcc *eni_vcc;
515 unsigned long descr;
516 unsigned long length;
517 struct sk_buff *skb;
518
519 DPRINTK(">rx_aal0\n");
520 eni_vcc = ENI_VCC(vcc);
521 descr = readl(eni_vcc->recv+eni_vcc->descr*4);
522 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
523 rx_ident_err(vcc);
524 return 1;
525 }
526 if (descr & MID_RED_T) {
527 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
528 vcc->dev->number);
529 length = 0;
530 atomic_inc(&vcc->stats->rx_err);
531 }
532 else {
533 length = ATM_CELL_SIZE-1; /* no HEC */
534 }
535 skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL;
536 if (!skb) {
537 discard(vcc,length >> 2);
538 return 0;
539 }
540 skb_put(skb,length);
541 skb->tstamp = eni_vcc->timestamp;
542 DPRINTK("got len %ld\n",length);
543 if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1;
544 eni_vcc->rxing++;
545 return 0;
546}
547
548
549static int rx_aal5(struct atm_vcc *vcc)
550{
551 struct eni_vcc *eni_vcc;
552 unsigned long descr;
553 unsigned long size,eff,length;
554 struct sk_buff *skb;
555
556 EVENT("rx_aal5\n",0,0);
557 DPRINTK(">rx_aal5\n");
558 eni_vcc = ENI_VCC(vcc);
559 descr = readl(eni_vcc->recv+eni_vcc->descr*4);
560 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
561 rx_ident_err(vcc);
562 return 1;
563 }
564 if (descr & (MID_RED_T | MID_RED_CRC_ERR)) {
565 if (descr & MID_RED_T) {
566 EVENT("empty cell (descr=0x%lx)\n",descr,0);
567 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
568 vcc->dev->number);
569 size = 0;
570 }
571 else {
572 static unsigned long silence = 0;
573
574 if (time_after(jiffies, silence) || silence == 0) {
575 printk(KERN_WARNING DEV_LABEL "(itf %d): "
576 "discarding PDU(s) with CRC error\n",
577 vcc->dev->number);
578 silence = (jiffies+2*HZ)|1;
579 }
580 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
581 EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr,
582 size);
583 }
584 eff = length = 0;
585 atomic_inc(&vcc->stats->rx_err);
586 }
587 else {
588 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
589 DPRINTK("size=%ld\n",size);
590 length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) &
591 (eni_vcc->words-1)))*4) & 0xffff;
592 /* -trailer(2)+header(1) */
593 if (length && length <= (size << 2)-8 && length <=
594 ATM_MAX_AAL5_PDU) eff = (length+3) >> 2;
595 else { /* ^ trailer length (8) */
596 EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr,
597 length);
598 printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU "
599 "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n",
600 vcc->dev->number,vcc->vci,length,size << 2,descr);
601 length = eff = 0;
602 atomic_inc(&vcc->stats->rx_err);
603 }
604 }
605 skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL;
606 if (!skb) {
607 discard(vcc,size);
608 return 0;
609 }
610 skb_put(skb,length);
611 DPRINTK("got len %ld\n",length);
612 if (do_rx_dma(vcc,skb,1,size,eff)) return 1;
613 eni_vcc->rxing++;
614 return 0;
615}
616
617
618static inline int rx_vcc(struct atm_vcc *vcc)
619{
620 void __iomem *vci_dsc;
621 unsigned long tmp;
622 struct eni_vcc *eni_vcc;
623
624 eni_vcc = ENI_VCC(vcc);
625 vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16;
626 EVENT("rx_vcc(1)\n",0,0);
627 while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >>
628 MID_VCI_DESCR_SHIFT)) {
629 EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n",
630 eni_vcc->descr,tmp);
631 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
632 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
633 MID_VCI_DESCR_SHIFT));
634 if (ENI_VCC(vcc)->rx(vcc)) return 1;
635 }
636 /* clear IN_SERVICE flag */
637 writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc);
638 /*
639 * If new data has arrived between evaluating the while condition and
640 * clearing IN_SERVICE, we wouldn't be notified until additional data
641 * follows. So we have to loop again to be sure.
642 */
643 EVENT("rx_vcc(3)\n",0,0);
644 while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR)
645 >> MID_VCI_DESCR_SHIFT)) {
646 EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n",
647 eni_vcc->descr,tmp);
648 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
649 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
650 MID_VCI_DESCR_SHIFT));
651 if (ENI_VCC(vcc)->rx(vcc)) return 1;
652 }
653 return 0;
654}
655
656
657static void poll_rx(struct atm_dev *dev)
658{
659 struct eni_dev *eni_dev;
660 struct atm_vcc *curr;
661
662 eni_dev = ENI_DEV(dev);
663 while ((curr = eni_dev->fast)) {
664 EVENT("poll_rx.fast\n",0,0);
665 if (rx_vcc(curr)) return;
666 eni_dev->fast = ENI_VCC(curr)->next;
667 ENI_VCC(curr)->next = ENI_VCC_NOS;
668 barrier();
669 ENI_VCC(curr)->servicing--;
670 }
671 while ((curr = eni_dev->slow)) {
672 EVENT("poll_rx.slow\n",0,0);
673 if (rx_vcc(curr)) return;
674 eni_dev->slow = ENI_VCC(curr)->next;
675 ENI_VCC(curr)->next = ENI_VCC_NOS;
676 barrier();
677 ENI_VCC(curr)->servicing--;
678 }
679}
680
681
682static void get_service(struct atm_dev *dev)
683{
684 struct eni_dev *eni_dev;
685 struct atm_vcc *vcc;
686 unsigned long vci;
687
688 DPRINTK(">get_service\n");
689 eni_dev = ENI_DEV(dev);
690 while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) {
691 vci = readl(eni_dev->service+eni_dev->serv_read*4);
692 eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1);
693 vcc = eni_dev->rx_map[vci & 1023];
694 if (!vcc) {
695 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not "
696 "found\n",dev->number,vci);
697 continue; /* nasty but we try to go on anyway */
698 /* @@@ nope, doesn't work */
699 }
700 EVENT("getting from service\n",0,0);
701 if (ENI_VCC(vcc)->next != ENI_VCC_NOS) {
702 EVENT("double service\n",0,0);
703 DPRINTK("Grr, servicing VCC %ld twice\n",vci);
704 continue;
705 }
706 ENI_VCC(vcc)->timestamp = ktime_get_real();
707 ENI_VCC(vcc)->next = NULL;
708 if (vcc->qos.rxtp.traffic_class == ATM_CBR) {
709 if (eni_dev->fast)
710 ENI_VCC(eni_dev->last_fast)->next = vcc;
711 else eni_dev->fast = vcc;
712 eni_dev->last_fast = vcc;
713 }
714 else {
715 if (eni_dev->slow)
716 ENI_VCC(eni_dev->last_slow)->next = vcc;
717 else eni_dev->slow = vcc;
718 eni_dev->last_slow = vcc;
719 }
720 putting++;
721 ENI_VCC(vcc)->servicing++;
722 }
723}
724
725
726static void dequeue_rx(struct atm_dev *dev)
727{
728 struct eni_dev *eni_dev;
729 struct eni_vcc *eni_vcc;
730 struct atm_vcc *vcc;
731 struct sk_buff *skb;
732 void __iomem *vci_dsc;
733 int first;
734
735 eni_dev = ENI_DEV(dev);
736 first = 1;
737 while (1) {
738 skb = skb_dequeue(&eni_dev->rx_queue);
739 if (!skb) {
740 if (first) {
741 DPRINTK(DEV_LABEL "(itf %d): RX but not "
742 "rxing\n",dev->number);
743 EVENT("nothing to dequeue\n",0,0);
744 }
745 break;
746 }
747 EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb),
748 ENI_PRV_POS(skb));
749 rx_dequeued++;
750 vcc = ATM_SKB(skb)->vcc;
751 eni_vcc = ENI_VCC(vcc);
752 first = 0;
753 vci_dsc = eni_dev->vci+vcc->vci*16;
754 if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb),
755 (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT,
756 eni_vcc->words)) {
757 EVENT("requeuing\n",0,0);
758 skb_queue_head(&eni_dev->rx_queue,skb);
759 break;
760 }
761 eni_vcc->rxing--;
762 eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1);
763 dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len,
764 DMA_TO_DEVICE);
765 if (!skb->len) dev_kfree_skb_irq(skb);
766 else {
767 EVENT("pushing (len=%ld)\n",skb->len,0);
768 if (vcc->qos.aal == ATM_AAL0)
769 *(unsigned long *) skb->data =
770 ntohl(*(unsigned long *) skb->data);
771 memset(skb->cb,0,sizeof(struct eni_skb_prv));
772 vcc->push(vcc,skb);
773 pushed++;
774 }
775 atomic_inc(&vcc->stats->rx);
776 }
777 wake_up(&eni_dev->rx_wait);
778}
779
780
781static int open_rx_first(struct atm_vcc *vcc)
782{
783 struct eni_dev *eni_dev;
784 struct eni_vcc *eni_vcc;
785 unsigned long size;
786
787 DPRINTK("open_rx_first\n");
788 eni_dev = ENI_DEV(vcc->dev);
789 eni_vcc = ENI_VCC(vcc);
790 eni_vcc->rx = NULL;
791 if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0;
792 size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100;
793 if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <=
794 MID_MAX_BUF_SIZE)
795 size = MID_MAX_BUF_SIZE;
796 eni_vcc->recv = eni_alloc_mem(eni_dev,&size);
797 DPRINTK("rx at 0x%lx\n",eni_vcc->recv);
798 eni_vcc->words = size >> 2;
799 if (!eni_vcc->recv) return -ENOBUFS;
800 eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0;
801 eni_vcc->descr = 0;
802 eni_vcc->rx_pos = 0;
803 eni_vcc->rxing = 0;
804 eni_vcc->servicing = 0;
805 eni_vcc->next = ENI_VCC_NOS;
806 return 0;
807}
808
809
810static int open_rx_second(struct atm_vcc *vcc)
811{
812 void __iomem *here;
813 struct eni_dev *eni_dev;
814 struct eni_vcc *eni_vcc;
815 unsigned long size;
816 int order;
817
818 DPRINTK("open_rx_second\n");
819 eni_dev = ENI_DEV(vcc->dev);
820 eni_vcc = ENI_VCC(vcc);
821 if (!eni_vcc->rx) return 0;
822 /* set up VCI descriptor */
823 here = eni_dev->vci+vcc->vci*16;
824 DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4);
825 size = eni_vcc->words >> 8;
826 for (order = -1; size; order++) size >>= 1;
827 writel(0,here+4); /* descr, read = 0 */
828 writel(0,here+8); /* write, state, count = 0 */
829 if (eni_dev->rx_map[vcc->vci])
830 printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already "
831 "in use\n",vcc->dev->number,vcc->vci);
832 eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */
833 writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) <<
834 MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE |
835 (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) <<
836 MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here);
837 return 0;
838}
839
840
841static void close_rx(struct atm_vcc *vcc)
842{
843 DECLARE_WAITQUEUE(wait,current);
844 void __iomem *here;
845 struct eni_dev *eni_dev;
846 struct eni_vcc *eni_vcc;
847
848 eni_vcc = ENI_VCC(vcc);
849 if (!eni_vcc->rx) return;
850 eni_dev = ENI_DEV(vcc->dev);
851 if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) {
852 here = eni_dev->vci+vcc->vci*16;
853 /* block receiver */
854 writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH <<
855 MID_VCI_MODE_SHIFT),here);
856 /* wait for receiver to become idle */
857 udelay(27);
858 /* discard pending cell */
859 writel(readl(here) & ~MID_VCI_IN_SERVICE,here);
860 /* don't accept any new ones */
861 eni_dev->rx_map[vcc->vci] = NULL;
862 /* wait for RX queue to drain */
863 DPRINTK("eni_close: waiting for RX ...\n");
864 EVENT("RX closing\n",0,0);
865 add_wait_queue(&eni_dev->rx_wait,&wait);
866 set_current_state(TASK_UNINTERRUPTIBLE);
867 barrier();
868 for (;;) {
869 /* transition service->rx: rxing++, servicing-- */
870 if (!eni_vcc->servicing) {
871 barrier();
872 if (!eni_vcc->rxing) break;
873 }
874 EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing,
875 eni_vcc->servicing);
876 printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing,
877 eni_vcc->rxing);
878 schedule();
879 set_current_state(TASK_UNINTERRUPTIBLE);
880 }
881 for (;;) {
882 int at_end;
883 u32 tmp;
884
885 tasklet_disable(&eni_dev->task);
886 tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ;
887 at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT;
888 tasklet_enable(&eni_dev->task);
889 if (at_end) break;
890 EVENT("drain discard (host 0x%lx, nic 0x%lx)\n",
891 eni_vcc->rx_pos,tmp);
892 printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n",
893 eni_vcc->rx_pos,tmp);
894 schedule();
895 set_current_state(TASK_UNINTERRUPTIBLE);
896 }
897 set_current_state(TASK_RUNNING);
898 remove_wait_queue(&eni_dev->rx_wait,&wait);
899 }
900 eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2);
901 eni_vcc->rx = NULL;
902}
903
904
905static int start_rx(struct atm_dev *dev)
906{
907 struct eni_dev *eni_dev;
908
909 eni_dev = ENI_DEV(dev);
910 eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL);
911 if (!eni_dev->rx_map) {
912 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
913 dev->number);
914 free_page((unsigned long) eni_dev->free_list);
915 return -ENOMEM;
916 }
917 eni_dev->rx_mult = DEFAULT_RX_MULT;
918 eni_dev->fast = eni_dev->last_fast = NULL;
919 eni_dev->slow = eni_dev->last_slow = NULL;
920 init_waitqueue_head(&eni_dev->rx_wait);
921 skb_queue_head_init(&eni_dev->rx_queue);
922 eni_dev->serv_read = eni_in(MID_SERV_WRITE);
923 eni_out(0,MID_DMA_WR_RX);
924 return 0;
925}
926
927
928/*----------------------------------- TX ------------------------------------*/
929
930
931enum enq_res { enq_ok,enq_next,enq_jam };
932
933
934static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr,
935 u32 size)
936{
937 u32 init,words;
938
939 DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size);
940 EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size);
941#if 0 /* don't complain anymore */
942 if (paddr & 3)
943 printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr);
944 if (size & 3)
945 printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size);
946#endif
947 if (paddr & 3) {
948 init = 4-(paddr & 3);
949 if (init > size || size < 7) init = size;
950 DPRINTK("put_dma: %lx DMA: %d/%d bytes\n",
951 (unsigned long) paddr,init,size);
952 dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) |
953 (chan << MID_DMA_CHAN_SHIFT);
954 dma[(*j)++] = paddr;
955 paddr += init;
956 size -= init;
957 }
958 words = size >> 2;
959 size &= 3;
960 if (words && (paddr & 31)) {
961 init = 8-((paddr & 31) >> 2);
962 if (init > words) init = words;
963 DPRINTK("put_dma: %lx DMA: %d/%d words\n",
964 (unsigned long) paddr,init,words);
965 dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
966 (chan << MID_DMA_CHAN_SHIFT);
967 dma[(*j)++] = paddr;
968 paddr += init << 2;
969 words -= init;
970 }
971#ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */
972 if (words & ~15) {
973 DPRINTK("put_dma: %lx DMA: %d*16/%d words\n",
974 (unsigned long) paddr,words >> 4,words);
975 dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT)
976 | (chan << MID_DMA_CHAN_SHIFT);
977 dma[(*j)++] = paddr;
978 paddr += (words & ~15) << 2;
979 words &= 15;
980 }
981#endif
982#ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */
983 if (words & ~7) {
984 DPRINTK("put_dma: %lx DMA: %d*8/%d words\n",
985 (unsigned long) paddr,words >> 3,words);
986 dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT)
987 | (chan << MID_DMA_CHAN_SHIFT);
988 dma[(*j)++] = paddr;
989 paddr += (words & ~7) << 2;
990 words &= 7;
991 }
992#endif
993#ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */
994 if (words & ~3) {
995 DPRINTK("put_dma: %lx DMA: %d*4/%d words\n",
996 (unsigned long) paddr,words >> 2,words);
997 dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT)
998 | (chan << MID_DMA_CHAN_SHIFT);
999 dma[(*j)++] = paddr;
1000 paddr += (words & ~3) << 2;
1001 words &= 3;
1002 }
1003#endif
1004#ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */
1005 if (words & ~1) {
1006 DPRINTK("put_dma: %lx DMA: %d*2/%d words\n",
1007 (unsigned long) paddr,words >> 1,words);
1008 dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT)
1009 | (chan << MID_DMA_CHAN_SHIFT);
1010 dma[(*j)++] = paddr;
1011 paddr += (words & ~1) << 2;
1012 words &= 1;
1013 }
1014#endif
1015 if (words) {
1016 DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr,
1017 words);
1018 dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) |
1019 (chan << MID_DMA_CHAN_SHIFT);
1020 dma[(*j)++] = paddr;
1021 paddr += words << 2;
1022 }
1023 if (size) {
1024 DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr,
1025 size);
1026 dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) |
1027 (chan << MID_DMA_CHAN_SHIFT);
1028 dma[(*j)++] = paddr;
1029 }
1030}
1031
1032
1033static enum enq_res do_tx(struct sk_buff *skb)
1034{
1035 struct atm_vcc *vcc;
1036 struct eni_dev *eni_dev;
1037 struct eni_vcc *eni_vcc;
1038 struct eni_tx *tx;
1039 dma_addr_t paddr;
1040 u32 dma_rd,dma_wr;
1041 u32 size; /* in words */
1042 int aal5,dma_size,i,j;
1043
1044 DPRINTK(">do_tx\n");
1045 NULLCHECK(skb);
1046 EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len);
1047 vcc = ATM_SKB(skb)->vcc;
1048 NULLCHECK(vcc);
1049 eni_dev = ENI_DEV(vcc->dev);
1050 NULLCHECK(eni_dev);
1051 eni_vcc = ENI_VCC(vcc);
1052 tx = eni_vcc->tx;
1053 NULLCHECK(tx);
1054#if 0 /* Enable this for testing with the "align" program */
1055 {
1056 unsigned int hack = *((char *) skb->data)-'0';
1057
1058 if (hack < 8) {
1059 skb->data += hack;
1060 skb->len -= hack;
1061 }
1062 }
1063#endif
1064#if 0 /* should work now */
1065 if ((unsigned long) skb->data & 3)
1066 printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned "
1067 "TX data\n",vcc->dev->number,vcc->vci);
1068#endif
1069 /*
1070 * Potential future IP speedup: make hard_header big enough to put
1071 * segmentation descriptor directly into PDU. Saves: 4 slave writes,
1072 * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-)
1073 */
1074
1075 aal5 = vcc->qos.aal == ATM_AAL5;
1076 /* check space in buffer */
1077 if (!aal5)
1078 size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE;
1079 /* cell without HEC plus segmentation header (includes
1080 four-byte cell header) */
1081 else {
1082 size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1;
1083 /* add AAL5 trailer */
1084 size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE;
1085 /* add segmentation header */
1086 }
1087 /*
1088 * Can I move tx_pos by size bytes without getting closer than TX_GAP
1089 * to the read pointer ? TX_GAP means to leave some space for what
1090 * the manual calls "too close".
1091 */
1092 if (!NEPMOK(tx->tx_pos,size+TX_GAP,
1093 eni_in(MID_TX_RDPTR(tx->index)),tx->words)) {
1094 DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n",
1095 vcc->dev->number,size);
1096 return enq_next;
1097 }
1098 /* check DMA */
1099 dma_wr = eni_in(MID_DMA_WR_TX);
1100 dma_rd = eni_in(MID_DMA_RD_TX);
1101 dma_size = 3; /* JK for descriptor and final fill, plus final size
1102 mis-alignment fix */
1103DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags);
1104 if (!skb_shinfo(skb)->nr_frags) dma_size += 5;
1105 else dma_size += 5*(skb_shinfo(skb)->nr_frags+1);
1106 if (dma_size > TX_DMA_BUF) {
1107 printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries "
1108 "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF);
1109 }
1110 DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos);
1111 if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) <
1112 dma_size) {
1113 printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n",
1114 vcc->dev->number);
1115 return enq_jam;
1116 }
1117 paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len,
1118 DMA_TO_DEVICE);
1119 ENI_PRV_PADDR(skb) = paddr;
1120 /* prepare DMA queue entries */
1121 j = 0;
1122 eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) <<
1123 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1124 MID_DT_JK;
1125 j++;
1126 if (!skb_shinfo(skb)->nr_frags)
1127 if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len);
1128 else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4);
1129 else {
1130DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */
1131 for (i = -1; i < skb_shinfo(skb)->nr_frags; i++)
1132 if (i == -1)
1133 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1134 skb->data,
1135 skb_headlen(skb));
1136 else
1137 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1138 skb_frag_page(&skb_shinfo(skb)->frags[i]) +
1139 skb_frag_off(&skb_shinfo(skb)->frags[i]),
1140 skb_frag_size(&skb_shinfo(skb)->frags[i]));
1141 }
1142 if (skb->len & 3) {
1143 put_dma(tx->index, eni_dev->dma, &j, eni_dev->zero.dma,
1144 4 - (skb->len & 3));
1145 }
1146 /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */
1147 eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) <<
1148 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1149 MID_DMA_END | MID_DT_JK;
1150 j++;
1151 DPRINTK("DMA at end: %d\n",j);
1152 /* store frame */
1153 writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) |
1154 (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) |
1155 (tx->resolution << MID_SEG_RATE_SHIFT) |
1156 (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4);
1157/*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/
1158 writel((vcc->vci << MID_SEG_VCI_SHIFT) |
1159 (aal5 ? 0 : (skb->data[3] & 0xf)) |
1160 (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0),
1161 tx->send+((tx->tx_pos+1) & (tx->words-1))*4);
1162 DPRINTK("size: %d, len:%d\n",size,skb->len);
1163 if (aal5)
1164 writel(skb->len,tx->send+
1165 ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4);
1166 j = j >> 1;
1167 for (i = 0; i < j; i++) {
1168 writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8);
1169 writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4);
1170 dma_wr = (dma_wr+1) & (NR_DMA_TX-1);
1171 }
1172 ENI_PRV_POS(skb) = tx->tx_pos;
1173 ENI_PRV_SIZE(skb) = size;
1174 ENI_VCC(vcc)->txing += size;
1175 tx->tx_pos = (tx->tx_pos+size) & (tx->words-1);
1176 DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos);
1177 eni_out(dma_wr,MID_DMA_WR_TX);
1178 skb_queue_tail(&eni_dev->tx_queue,skb);
1179 queued++;
1180 return enq_ok;
1181}
1182
1183
1184static void poll_tx(struct atm_dev *dev)
1185{
1186 struct eni_tx *tx;
1187 struct sk_buff *skb;
1188 enum enq_res res;
1189 int i;
1190
1191 DPRINTK(">poll_tx\n");
1192 for (i = NR_CHAN-1; i >= 0; i--) {
1193 tx = &ENI_DEV(dev)->tx[i];
1194 if (tx->send)
1195 while ((skb = skb_dequeue(&tx->backlog))) {
1196 res = do_tx(skb);
1197 if (res == enq_ok) continue;
1198 DPRINTK("re-queuing TX PDU\n");
1199 skb_queue_head(&tx->backlog,skb);
1200 requeued++;
1201 if (res == enq_jam) return;
1202 break;
1203 }
1204 }
1205}
1206
1207
1208static void dequeue_tx(struct atm_dev *dev)
1209{
1210 struct eni_dev *eni_dev;
1211 struct atm_vcc *vcc;
1212 struct sk_buff *skb;
1213 struct eni_tx *tx;
1214
1215 NULLCHECK(dev);
1216 eni_dev = ENI_DEV(dev);
1217 NULLCHECK(eni_dev);
1218 while ((skb = skb_dequeue(&eni_dev->tx_queue))) {
1219 vcc = ATM_SKB(skb)->vcc;
1220 NULLCHECK(vcc);
1221 tx = ENI_VCC(vcc)->tx;
1222 NULLCHECK(ENI_VCC(vcc)->tx);
1223 DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb),
1224 (unsigned) eni_in(MID_TX_DESCRSTART(tx->index)));
1225 if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) ==
1226 eni_in(MID_TX_DESCRSTART(tx->index))) {
1227 skb_queue_head(&eni_dev->tx_queue,skb);
1228 break;
1229 }
1230 ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb);
1231 dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len,
1232 DMA_TO_DEVICE);
1233 if (vcc->pop) vcc->pop(vcc,skb);
1234 else dev_kfree_skb_irq(skb);
1235 atomic_inc(&vcc->stats->tx);
1236 wake_up(&eni_dev->tx_wait);
1237 dma_complete++;
1238 }
1239}
1240
1241
1242static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr)
1243{
1244 int i;
1245
1246 for (i = !ubr; i < NR_CHAN; i++)
1247 if (!eni_dev->tx[i].send) return eni_dev->tx+i;
1248 return NULL;
1249}
1250
1251
1252static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre,
1253 int *res,int unlimited)
1254{
1255 static const int pre_div[] = { 4,16,128,2048 };
1256 /* 2^(((x+2)^2-(x+2))/2+1) */
1257
1258 if (unlimited) *pre = *res = 0;
1259 else {
1260 if (*pcr > 0) {
1261 int div;
1262
1263 for (*pre = 0; *pre < 3; (*pre)++)
1264 if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break;
1265 div = pre_div[*pre]**pcr;
1266 DPRINTK("min div %d\n",div);
1267 *res = TS_CLOCK/div-1;
1268 }
1269 else {
1270 int div;
1271
1272 if (!*pcr) *pcr = eni_dev->tx_bw+reserved;
1273 for (*pre = 3; *pre >= 0; (*pre)--)
1274 if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break;
1275 if (*pre < 3) (*pre)++; /* else fail later */
1276 div = pre_div[*pre]*-*pcr;
1277 DPRINTK("max div %d\n",div);
1278 *res = DIV_ROUND_UP(TS_CLOCK, div)-1;
1279 }
1280 if (*res < 0) *res = 0;
1281 if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE;
1282 }
1283 *pcr = TS_CLOCK/pre_div[*pre]/(*res+1);
1284 DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res);
1285 return 0;
1286}
1287
1288
1289static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp,
1290 int set_rsv,int set_shp)
1291{
1292 struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1293 struct eni_vcc *eni_vcc = ENI_VCC(vcc);
1294 struct eni_tx *tx;
1295 unsigned long size;
1296 void __iomem *mem;
1297 int rate,ubr,unlimited,new_tx;
1298 int pre,res,order;
1299 int error;
1300
1301 rate = atm_pcr_goal(txtp);
1302 ubr = txtp->traffic_class == ATM_UBR;
1303 unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR ||
1304 rate >= ATM_OC3_PCR);
1305 if (!unlimited) {
1306 size = txtp->max_sdu*eni_dev->tx_mult/100;
1307 if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <=
1308 MID_MAX_BUF_SIZE)
1309 size = MID_MAX_BUF_SIZE;
1310 }
1311 else {
1312 if (eni_dev->ubr) {
1313 eni_vcc->tx = eni_dev->ubr;
1314 txtp->pcr = ATM_OC3_PCR;
1315 return 0;
1316 }
1317 size = UBR_BUFFER;
1318 }
1319 new_tx = !eni_vcc->tx;
1320 mem = NULL; /* for gcc */
1321 if (!new_tx) tx = eni_vcc->tx;
1322 else {
1323 mem = eni_alloc_mem(eni_dev,&size);
1324 if (!mem) return -ENOBUFS;
1325 tx = alloc_tx(eni_dev,unlimited);
1326 if (!tx) {
1327 eni_free_mem(eni_dev,mem,size);
1328 return -EBUSY;
1329 }
1330 DPRINTK("got chan %d\n",tx->index);
1331 tx->reserved = tx->shaping = 0;
1332 tx->send = mem;
1333 tx->words = size >> 2;
1334 skb_queue_head_init(&tx->backlog);
1335 for (order = 0; size > (1 << (order+10)); order++);
1336 eni_out((order << MID_SIZE_SHIFT) |
1337 ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)),
1338 MID_TX_PLACE(tx->index));
1339 tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) &
1340 MID_DESCR_START;
1341 }
1342 error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited);
1343 if (!error && txtp->min_pcr > rate) error = -EINVAL;
1344 if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR &&
1345 txtp->max_pcr < rate) error = -EINVAL;
1346 if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved)
1347 error = -EINVAL;
1348 if (!error && set_rsv && !set_shp && rate < tx->shaping)
1349 error = -EINVAL;
1350 if (!error && !set_rsv && rate > tx->reserved && !ubr)
1351 error = -EINVAL;
1352 if (error) {
1353 if (new_tx) {
1354 tx->send = NULL;
1355 eni_free_mem(eni_dev,mem,size);
1356 }
1357 return error;
1358 }
1359 txtp->pcr = rate;
1360 if (set_rsv && !ubr) {
1361 eni_dev->tx_bw += tx->reserved;
1362 tx->reserved = rate;
1363 eni_dev->tx_bw -= rate;
1364 }
1365 if (set_shp || (unlimited && new_tx)) {
1366 if (unlimited && new_tx) eni_dev->ubr = tx;
1367 tx->prescaler = pre;
1368 tx->resolution = res;
1369 tx->shaping = rate;
1370 }
1371 if (set_shp) eni_vcc->tx = tx;
1372 DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping);
1373 return 0;
1374}
1375
1376
1377static int open_tx_first(struct atm_vcc *vcc)
1378{
1379 ENI_VCC(vcc)->tx = NULL;
1380 if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0;
1381 ENI_VCC(vcc)->txing = 0;
1382 return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1);
1383}
1384
1385
1386static int open_tx_second(struct atm_vcc *vcc)
1387{
1388 return 0; /* nothing to do */
1389}
1390
1391
1392static void close_tx(struct atm_vcc *vcc)
1393{
1394 DECLARE_WAITQUEUE(wait,current);
1395 struct eni_dev *eni_dev;
1396 struct eni_vcc *eni_vcc;
1397
1398 eni_vcc = ENI_VCC(vcc);
1399 if (!eni_vcc->tx) return;
1400 eni_dev = ENI_DEV(vcc->dev);
1401 /* wait for TX queue to drain */
1402 DPRINTK("eni_close: waiting for TX ...\n");
1403 add_wait_queue(&eni_dev->tx_wait,&wait);
1404 set_current_state(TASK_UNINTERRUPTIBLE);
1405 for (;;) {
1406 int txing;
1407
1408 tasklet_disable(&eni_dev->task);
1409 txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing;
1410 tasklet_enable(&eni_dev->task);
1411 if (!txing) break;
1412 DPRINTK("%d TX left\n",eni_vcc->txing);
1413 schedule();
1414 set_current_state(TASK_UNINTERRUPTIBLE);
1415 }
1416 set_current_state(TASK_RUNNING);
1417 remove_wait_queue(&eni_dev->tx_wait,&wait);
1418 if (eni_vcc->tx != eni_dev->ubr) {
1419 /*
1420 * Looping a few times in here is probably far cheaper than
1421 * keeping track of TX completions all the time, so let's poll
1422 * a bit ...
1423 */
1424 while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) !=
1425 eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index)))
1426 schedule();
1427 eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2);
1428 eni_vcc->tx->send = NULL;
1429 eni_dev->tx_bw += eni_vcc->tx->reserved;
1430 }
1431 eni_vcc->tx = NULL;
1432}
1433
1434
1435static int start_tx(struct atm_dev *dev)
1436{
1437 struct eni_dev *eni_dev;
1438 int i;
1439
1440 eni_dev = ENI_DEV(dev);
1441 eni_dev->lost = 0;
1442 eni_dev->tx_bw = ATM_OC3_PCR;
1443 eni_dev->tx_mult = DEFAULT_TX_MULT;
1444 init_waitqueue_head(&eni_dev->tx_wait);
1445 eni_dev->ubr = NULL;
1446 skb_queue_head_init(&eni_dev->tx_queue);
1447 eni_out(0,MID_DMA_WR_TX);
1448 for (i = 0; i < NR_CHAN; i++) {
1449 eni_dev->tx[i].send = NULL;
1450 eni_dev->tx[i].index = i;
1451 }
1452 return 0;
1453}
1454
1455
1456/*--------------------------------- common ----------------------------------*/
1457
1458
1459#if 0 /* may become useful again when tuning things */
1460
1461static void foo(void)
1462{
1463printk(KERN_INFO
1464 "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n"
1465 "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n",
1466 tx_complete,dma_complete,queued,requeued,submitted,backlogged,
1467 rx_enqueued,rx_dequeued,putting,pushed);
1468if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost);
1469}
1470
1471#endif
1472
1473
1474static void bug_int(struct atm_dev *dev,unsigned long reason)
1475{
1476 DPRINTK(">bug_int\n");
1477 if (reason & MID_DMA_ERR_ACK)
1478 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1479 "error\n",dev->number);
1480 if (reason & MID_TX_IDENT_MISM)
1481 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident "
1482 "mismatch\n",dev->number);
1483 if (reason & MID_TX_DMA_OVFL)
1484 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1485 "overflow\n",dev->number);
1486 EVENT("---dump ends here---\n",0,0);
1487 printk(KERN_NOTICE "---recent events---\n");
1488 event_dump();
1489}
1490
1491
1492static irqreturn_t eni_int(int irq,void *dev_id)
1493{
1494 struct atm_dev *dev;
1495 struct eni_dev *eni_dev;
1496 u32 reason;
1497
1498 DPRINTK(">eni_int\n");
1499 dev = dev_id;
1500 eni_dev = ENI_DEV(dev);
1501 reason = eni_in(MID_ISA);
1502 DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason);
1503 /*
1504 * Must handle these two right now, because reading ISA doesn't clear
1505 * them, so they re-occur and we never make it to the tasklet. Since
1506 * they're rare, we don't mind the occasional invocation of eni_tasklet
1507 * with eni_dev->events == 0.
1508 */
1509 if (reason & MID_STAT_OVFL) {
1510 EVENT("stat overflow\n",0,0);
1511 eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH;
1512 }
1513 if (reason & MID_SUNI_INT) {
1514 EVENT("SUNI int\n",0,0);
1515 dev->phy->interrupt(dev);
1516#if 0
1517 foo();
1518#endif
1519 }
1520 spin_lock(&eni_dev->lock);
1521 eni_dev->events |= reason;
1522 spin_unlock(&eni_dev->lock);
1523 tasklet_schedule(&eni_dev->task);
1524 return IRQ_HANDLED;
1525}
1526
1527
1528static void eni_tasklet(unsigned long data)
1529{
1530 struct atm_dev *dev = (struct atm_dev *) data;
1531 struct eni_dev *eni_dev = ENI_DEV(dev);
1532 unsigned long flags;
1533 u32 events;
1534
1535 DPRINTK("eni_tasklet (dev %p)\n",dev);
1536 spin_lock_irqsave(&eni_dev->lock,flags);
1537 events = xchg(&eni_dev->events,0);
1538 spin_unlock_irqrestore(&eni_dev->lock,flags);
1539 if (events & MID_RX_DMA_COMPLETE) {
1540 EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0);
1541 dequeue_rx(dev);
1542 EVENT("dequeue_rx done, starting poll_rx\n",0,0);
1543 poll_rx(dev);
1544 EVENT("poll_rx done\n",0,0);
1545 /* poll_tx ? */
1546 }
1547 if (events & MID_SERVICE) {
1548 EVENT("INT: service, starting get_service\n",0,0);
1549 get_service(dev);
1550 EVENT("get_service done, starting poll_rx\n",0,0);
1551 poll_rx(dev);
1552 EVENT("poll_rx done\n",0,0);
1553 }
1554 if (events & MID_TX_DMA_COMPLETE) {
1555 EVENT("INT: TX DMA COMPLETE\n",0,0);
1556 dequeue_tx(dev);
1557 }
1558 if (events & MID_TX_COMPLETE) {
1559 EVENT("INT: TX COMPLETE\n",0,0);
1560 tx_complete++;
1561 wake_up(&eni_dev->tx_wait);
1562 /* poll_rx ? */
1563 }
1564 if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) {
1565 EVENT("bug interrupt\n",0,0);
1566 bug_int(dev,events);
1567 }
1568 poll_tx(dev);
1569}
1570
1571
1572/*--------------------------------- entries ---------------------------------*/
1573
1574
1575static char * const media_name[] = {
1576 "MMF", "SMF", "MMF", "03?", /* 0- 3 */
1577 "UTP", "05?", "06?", "07?", /* 4- 7 */
1578 "TAXI","09?", "10?", "11?", /* 8-11 */
1579 "12?", "13?", "14?", "15?", /* 12-15 */
1580 "MMF", "SMF", "18?", "19?", /* 16-19 */
1581 "UTP", "21?", "22?", "23?", /* 20-23 */
1582 "24?", "25?", "26?", "27?", /* 24-27 */
1583 "28?", "29?", "30?", "31?" /* 28-31 */
1584};
1585
1586
1587#define SET_SEPROM \
1588 ({ if (!error && !pci_error) { \
1589 pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \
1590 udelay(10); /* 10 usecs */ \
1591 } })
1592#define GET_SEPROM \
1593 ({ if (!error && !pci_error) { \
1594 pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \
1595 udelay(10); /* 10 usecs */ \
1596 } })
1597
1598
1599static int get_esi_asic(struct atm_dev *dev)
1600{
1601 struct eni_dev *eni_dev;
1602 unsigned char tonga;
1603 int error,failed,pci_error;
1604 int address,i,j;
1605
1606 eni_dev = ENI_DEV(dev);
1607 error = pci_error = 0;
1608 tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK;
1609 SET_SEPROM;
1610 for (i = 0; i < ESI_LEN && !error && !pci_error; i++) {
1611 /* start operation */
1612 tonga |= SEPROM_DATA;
1613 SET_SEPROM;
1614 tonga |= SEPROM_CLK;
1615 SET_SEPROM;
1616 tonga &= ~SEPROM_DATA;
1617 SET_SEPROM;
1618 tonga &= ~SEPROM_CLK;
1619 SET_SEPROM;
1620 /* send address */
1621 address = ((i+SEPROM_ESI_BASE) << 1)+1;
1622 for (j = 7; j >= 0; j--) {
1623 tonga = (address >> j) & 1 ? tonga | SEPROM_DATA :
1624 tonga & ~SEPROM_DATA;
1625 SET_SEPROM;
1626 tonga |= SEPROM_CLK;
1627 SET_SEPROM;
1628 tonga &= ~SEPROM_CLK;
1629 SET_SEPROM;
1630 }
1631 /* get ack */
1632 tonga |= SEPROM_DATA;
1633 SET_SEPROM;
1634 tonga |= SEPROM_CLK;
1635 SET_SEPROM;
1636 GET_SEPROM;
1637 failed = tonga & SEPROM_DATA;
1638 tonga &= ~SEPROM_CLK;
1639 SET_SEPROM;
1640 tonga |= SEPROM_DATA;
1641 SET_SEPROM;
1642 if (failed) error = -EIO;
1643 else {
1644 dev->esi[i] = 0;
1645 for (j = 7; j >= 0; j--) {
1646 dev->esi[i] <<= 1;
1647 tonga |= SEPROM_DATA;
1648 SET_SEPROM;
1649 tonga |= SEPROM_CLK;
1650 SET_SEPROM;
1651 GET_SEPROM;
1652 if (tonga & SEPROM_DATA) dev->esi[i] |= 1;
1653 tonga &= ~SEPROM_CLK;
1654 SET_SEPROM;
1655 tonga |= SEPROM_DATA;
1656 SET_SEPROM;
1657 }
1658 /* get ack */
1659 tonga |= SEPROM_DATA;
1660 SET_SEPROM;
1661 tonga |= SEPROM_CLK;
1662 SET_SEPROM;
1663 GET_SEPROM;
1664 if (!(tonga & SEPROM_DATA)) error = -EIO;
1665 tonga &= ~SEPROM_CLK;
1666 SET_SEPROM;
1667 tonga |= SEPROM_DATA;
1668 SET_SEPROM;
1669 }
1670 /* stop operation */
1671 tonga &= ~SEPROM_DATA;
1672 SET_SEPROM;
1673 tonga |= SEPROM_CLK;
1674 SET_SEPROM;
1675 tonga |= SEPROM_DATA;
1676 SET_SEPROM;
1677 }
1678 if (pci_error) {
1679 printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI "
1680 "(0x%02x)\n",dev->number,pci_error);
1681 error = -EIO;
1682 }
1683 return error;
1684}
1685
1686
1687#undef SET_SEPROM
1688#undef GET_SEPROM
1689
1690
1691static int get_esi_fpga(struct atm_dev *dev, void __iomem *base)
1692{
1693 void __iomem *mac_base;
1694 int i;
1695
1696 mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom);
1697 for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3));
1698 return 0;
1699}
1700
1701
1702static int eni_do_init(struct atm_dev *dev)
1703{
1704 struct midway_eprom __iomem *eprom;
1705 struct eni_dev *eni_dev;
1706 struct pci_dev *pci_dev;
1707 unsigned long real_base;
1708 void __iomem *base;
1709 int error,i,last;
1710
1711 DPRINTK(">eni_init\n");
1712 dev->ci_range.vpi_bits = 0;
1713 dev->ci_range.vci_bits = NR_VCI_LD;
1714 dev->link_rate = ATM_OC3_PCR;
1715 eni_dev = ENI_DEV(dev);
1716 pci_dev = eni_dev->pci_dev;
1717 real_base = pci_resource_start(pci_dev, 0);
1718 eni_dev->irq = pci_dev->irq;
1719 if ((error = pci_write_config_word(pci_dev,PCI_COMMAND,
1720 PCI_COMMAND_MEMORY |
1721 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1722 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory "
1723 "(0x%02x)\n",dev->number,error);
1724 return -EIO;
1725 }
1726 printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,",
1727 dev->number,pci_dev->revision,real_base,eni_dev->irq);
1728 if (!(base = ioremap_nocache(real_base,MAP_MAX_SIZE))) {
1729 printk("\n");
1730 printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page "
1731 "mapping\n",dev->number);
1732 return -ENOMEM;
1733 }
1734 eni_dev->ioaddr = base;
1735 eni_dev->base_diff = real_base - (unsigned long) base;
1736 /* id may not be present in ASIC Tonga boards - check this @@@ */
1737 if (!eni_dev->asic) {
1738 eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom));
1739 if (readl(&eprom->magic) != ENI155_MAGIC) {
1740 printk("\n");
1741 printk(KERN_ERR DEV_LABEL
1742 "(itf %d): bad magic - expected 0x%x, got 0x%x\n",
1743 dev->number, ENI155_MAGIC,
1744 (unsigned)readl(&eprom->magic));
1745 error = -EINVAL;
1746 goto unmap;
1747 }
1748 }
1749 eni_dev->phy = base+PHY_BASE;
1750 eni_dev->reg = base+REG_BASE;
1751 eni_dev->ram = base+RAM_BASE;
1752 last = MAP_MAX_SIZE-RAM_BASE;
1753 for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) {
1754 writel(0x55555555,eni_dev->ram+i);
1755 if (readl(eni_dev->ram+i) != 0x55555555) last = i;
1756 else {
1757 writel(0xAAAAAAAA,eni_dev->ram+i);
1758 if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i;
1759 else writel(i,eni_dev->ram+i);
1760 }
1761 }
1762 for (i = 0; i < last; i += RAM_INCREMENT)
1763 if (readl(eni_dev->ram+i) != i) break;
1764 eni_dev->mem = i;
1765 memset_io(eni_dev->ram,0,eni_dev->mem);
1766 /* TODO: should shrink allocation now */
1767 printk("mem=%dkB (",eni_dev->mem >> 10);
1768 /* TODO: check for non-SUNI, check for TAXI ? */
1769 if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) {
1770 printk(")\n");
1771 printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n",
1772 dev->number,(unsigned) eni_in(MID_RES_ID_MCON));
1773 error = -EINVAL;
1774 goto unmap;
1775 }
1776 error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base);
1777 if (error)
1778 goto unmap;
1779 for (i = 0; i < ESI_LEN; i++)
1780 printk("%s%02X",i ? "-" : "",dev->esi[i]);
1781 printk(")\n");
1782 printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number,
1783 eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA",
1784 media_name[eni_in(MID_RES_ID_MCON) & DAUGHTER_ID]);
1785
1786 error = suni_init(dev);
1787 if (error)
1788 goto unmap;
1789out:
1790 return error;
1791unmap:
1792 iounmap(base);
1793 goto out;
1794}
1795
1796static void eni_do_release(struct atm_dev *dev)
1797{
1798 struct eni_dev *ed = ENI_DEV(dev);
1799
1800 dev->phy->stop(dev);
1801 dev->phy = NULL;
1802 iounmap(ed->ioaddr);
1803}
1804
1805static int eni_start(struct atm_dev *dev)
1806{
1807 struct eni_dev *eni_dev;
1808
1809 void __iomem *buf;
1810 unsigned long buffer_mem;
1811 int error;
1812
1813 DPRINTK(">eni_start\n");
1814 eni_dev = ENI_DEV(dev);
1815 if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) {
1816 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
1817 dev->number,eni_dev->irq);
1818 error = -EAGAIN;
1819 goto out;
1820 }
1821 pci_set_master(eni_dev->pci_dev);
1822 if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND,
1823 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
1824 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1825 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+"
1826 "master (0x%02x)\n",dev->number,error);
1827 goto free_irq;
1828 }
1829 if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,
1830 END_SWAP_DMA))) {
1831 printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap "
1832 "(0x%02x)\n",dev->number,error);
1833 goto free_irq;
1834 }
1835 /* determine addresses of internal tables */
1836 eni_dev->vci = eni_dev->ram;
1837 eni_dev->rx_dma = eni_dev->ram+NR_VCI*16;
1838 eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8;
1839 eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8;
1840 buf = eni_dev->service+NR_SERVICE*4;
1841 DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n",
1842 eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma,
1843 eni_dev->service,buf);
1844 spin_lock_init(&eni_dev->lock);
1845 tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev);
1846 eni_dev->events = 0;
1847 /* initialize memory management */
1848 buffer_mem = eni_dev->mem - (buf - eni_dev->ram);
1849 eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2;
1850 eni_dev->free_list = kmalloc_array(eni_dev->free_list_size + 1,
1851 sizeof(*eni_dev->free_list),
1852 GFP_KERNEL);
1853 if (!eni_dev->free_list) {
1854 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
1855 dev->number);
1856 error = -ENOMEM;
1857 goto free_irq;
1858 }
1859 eni_dev->free_len = 0;
1860 eni_put_free(eni_dev,buf,buffer_mem);
1861 memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */
1862 /*
1863 * byte_addr free (k)
1864 * 0x00000000 512 VCI table
1865 * 0x00004000 496 RX DMA
1866 * 0x00005000 492 TX DMA
1867 * 0x00006000 488 service list
1868 * 0x00007000 484 buffers
1869 * 0x00080000 0 end (512kB)
1870 */
1871 eni_out(0xffffffff,MID_IE);
1872 error = start_tx(dev);
1873 if (error) goto free_list;
1874 error = start_rx(dev);
1875 if (error) goto free_list;
1876 error = dev->phy->start(dev);
1877 if (error) goto free_list;
1878 eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) |
1879 MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE,
1880 MID_MC_S);
1881 /* Tonga uses SBus INTReq1 */
1882 (void) eni_in(MID_ISA); /* clear Midway interrupts */
1883 return 0;
1884
1885free_list:
1886 kfree(eni_dev->free_list);
1887
1888free_irq:
1889 free_irq(eni_dev->irq, dev);
1890
1891out:
1892 return error;
1893}
1894
1895
1896static void eni_close(struct atm_vcc *vcc)
1897{
1898 DPRINTK(">eni_close\n");
1899 if (!ENI_VCC(vcc)) return;
1900 clear_bit(ATM_VF_READY,&vcc->flags);
1901 close_rx(vcc);
1902 close_tx(vcc);
1903 DPRINTK("eni_close: done waiting\n");
1904 /* deallocate memory */
1905 kfree(ENI_VCC(vcc));
1906 vcc->dev_data = NULL;
1907 clear_bit(ATM_VF_ADDR,&vcc->flags);
1908 /*foo();*/
1909}
1910
1911
1912static int eni_open(struct atm_vcc *vcc)
1913{
1914 struct eni_vcc *eni_vcc;
1915 int error;
1916 short vpi = vcc->vpi;
1917 int vci = vcc->vci;
1918
1919 DPRINTK(">eni_open\n");
1920 EVENT("eni_open\n",0,0);
1921 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1922 vcc->dev_data = NULL;
1923 if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
1924 set_bit(ATM_VF_ADDR,&vcc->flags);
1925 if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5)
1926 return -EINVAL;
1927 DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi,
1928 vcc->vci);
1929 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
1930 eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL);
1931 if (!eni_vcc) return -ENOMEM;
1932 vcc->dev_data = eni_vcc;
1933 eni_vcc->tx = NULL; /* for eni_close after open_rx */
1934 if ((error = open_rx_first(vcc))) {
1935 eni_close(vcc);
1936 return error;
1937 }
1938 if ((error = open_tx_first(vcc))) {
1939 eni_close(vcc);
1940 return error;
1941 }
1942 }
1943 if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0;
1944 if ((error = open_rx_second(vcc))) {
1945 eni_close(vcc);
1946 return error;
1947 }
1948 if ((error = open_tx_second(vcc))) {
1949 eni_close(vcc);
1950 return error;
1951 }
1952 set_bit(ATM_VF_READY,&vcc->flags);
1953 /* should power down SUNI while !ref_count @@@ */
1954 return 0;
1955}
1956
1957
1958static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs)
1959{
1960 struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1961 struct eni_tx *tx = ENI_VCC(vcc)->tx;
1962 struct sk_buff *skb;
1963 int error,rate,rsv,shp;
1964
1965 if (qos->txtp.traffic_class == ATM_NONE) return 0;
1966 if (tx == eni_dev->ubr) return -EBADFD;
1967 rate = atm_pcr_goal(&qos->txtp);
1968 if (rate < 0) rate = -rate;
1969 rsv = shp = 0;
1970 if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1;
1971 if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1;
1972 if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1;
1973 if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1;
1974 if (!rsv && !shp) return 0;
1975 error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp);
1976 if (error) return error;
1977 if (shp && !(flgs & ATM_MF_IMMED)) return 0;
1978 /*
1979 * Walk through the send buffer and patch the rate information in all
1980 * segmentation buffer descriptors of this VCC.
1981 */
1982 tasklet_disable(&eni_dev->task);
1983 skb_queue_walk(&eni_dev->tx_queue, skb) {
1984 void __iomem *dsc;
1985
1986 if (ATM_SKB(skb)->vcc != vcc) continue;
1987 dsc = tx->send+ENI_PRV_POS(skb)*4;
1988 writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) |
1989 (tx->prescaler << MID_SEG_PR_SHIFT) |
1990 (tx->resolution << MID_SEG_RATE_SHIFT), dsc);
1991 }
1992 tasklet_enable(&eni_dev->task);
1993 return 0;
1994}
1995
1996
1997static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
1998{
1999 struct eni_dev *eni_dev = ENI_DEV(dev);
2000
2001 if (cmd == ENI_MEMDUMP) {
2002 if (!capable(CAP_NET_ADMIN)) return -EPERM;
2003 printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d "
2004 "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number);
2005 dump(dev);
2006 return 0;
2007 }
2008 if (cmd == ENI_SETMULT) {
2009 struct eni_multipliers mult;
2010
2011 if (!capable(CAP_NET_ADMIN)) return -EPERM;
2012 if (copy_from_user(&mult, arg,
2013 sizeof(struct eni_multipliers)))
2014 return -EFAULT;
2015 if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) ||
2016 mult.tx > 65536 || mult.rx > 65536)
2017 return -EINVAL;
2018 if (mult.tx) eni_dev->tx_mult = mult.tx;
2019 if (mult.rx) eni_dev->rx_mult = mult.rx;
2020 return 0;
2021 }
2022 if (cmd == ATM_SETCIRANGE) {
2023 struct atm_cirange ci;
2024
2025 if (copy_from_user(&ci, arg,sizeof(struct atm_cirange)))
2026 return -EFAULT;
2027 if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) &&
2028 (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX))
2029 return 0;
2030 return -EINVAL;
2031 }
2032 if (!dev->phy->ioctl) return -ENOIOCTLCMD;
2033 return dev->phy->ioctl(dev,cmd,arg);
2034}
2035
2036
2037static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname,
2038 void __user *optval,int optlen)
2039{
2040 return -EINVAL;
2041}
2042
2043
2044static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname,
2045 void __user *optval,unsigned int optlen)
2046{
2047 return -EINVAL;
2048}
2049
2050
2051static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb)
2052{
2053 enum enq_res res;
2054
2055 DPRINTK(">eni_send\n");
2056 if (!ENI_VCC(vcc)->tx) {
2057 if (vcc->pop) vcc->pop(vcc,skb);
2058 else dev_kfree_skb(skb);
2059 return -EINVAL;
2060 }
2061 if (!skb) {
2062 printk(KERN_CRIT "!skb in eni_send ?\n");
2063 if (vcc->pop) vcc->pop(vcc,skb);
2064 return -EINVAL;
2065 }
2066 if (vcc->qos.aal == ATM_AAL0) {
2067 if (skb->len != ATM_CELL_SIZE-1) {
2068 if (vcc->pop) vcc->pop(vcc,skb);
2069 else dev_kfree_skb(skb);
2070 return -EINVAL;
2071 }
2072 *(u32 *) skb->data = htonl(*(u32 *) skb->data);
2073 }
2074 submitted++;
2075 ATM_SKB(skb)->vcc = vcc;
2076 tasklet_disable(&ENI_DEV(vcc->dev)->task);
2077 res = do_tx(skb);
2078 tasklet_enable(&ENI_DEV(vcc->dev)->task);
2079 if (res == enq_ok) return 0;
2080 skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb);
2081 backlogged++;
2082 tasklet_schedule(&ENI_DEV(vcc->dev)->task);
2083 return 0;
2084}
2085
2086static void eni_phy_put(struct atm_dev *dev,unsigned char value,
2087 unsigned long addr)
2088{
2089 writel(value,ENI_DEV(dev)->phy+addr*4);
2090}
2091
2092
2093
2094static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr)
2095{
2096 return readl(ENI_DEV(dev)->phy+addr*4);
2097}
2098
2099
2100static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page)
2101{
2102 struct sock *s;
2103 static const char *signal[] = { "LOST","unknown","okay" };
2104 struct eni_dev *eni_dev = ENI_DEV(dev);
2105 struct atm_vcc *vcc;
2106 int left,i;
2107
2108 left = *pos;
2109 if (!left)
2110 return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, "
2111 "%d cps remaining\n",dev->number,signal[(int) dev->signal],
2112 eni_dev->mem >> 10,eni_dev->tx_bw);
2113 if (!--left)
2114 return sprintf(page,"%4sBursts: TX"
2115#if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \
2116 !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \
2117 !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \
2118 !defined(CONFIG_ATM_ENI_BURST_TX_2W)
2119 " none"
2120#endif
2121#ifdef CONFIG_ATM_ENI_BURST_TX_16W
2122 " 16W"
2123#endif
2124#ifdef CONFIG_ATM_ENI_BURST_TX_8W
2125 " 8W"
2126#endif
2127#ifdef CONFIG_ATM_ENI_BURST_TX_4W
2128 " 4W"
2129#endif
2130#ifdef CONFIG_ATM_ENI_BURST_TX_2W
2131 " 2W"
2132#endif
2133 ", RX"
2134#if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \
2135 !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \
2136 !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \
2137 !defined(CONFIG_ATM_ENI_BURST_RX_2W)
2138 " none"
2139#endif
2140#ifdef CONFIG_ATM_ENI_BURST_RX_16W
2141 " 16W"
2142#endif
2143#ifdef CONFIG_ATM_ENI_BURST_RX_8W
2144 " 8W"
2145#endif
2146#ifdef CONFIG_ATM_ENI_BURST_RX_4W
2147 " 4W"
2148#endif
2149#ifdef CONFIG_ATM_ENI_BURST_RX_2W
2150 " 2W"
2151#endif
2152#ifndef CONFIG_ATM_ENI_TUNE_BURST
2153 " (default)"
2154#endif
2155 "\n","");
2156 if (!--left)
2157 return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n",
2158 "",eni_dev->tx_mult,eni_dev->rx_mult);
2159 for (i = 0; i < NR_CHAN; i++) {
2160 struct eni_tx *tx = eni_dev->tx+i;
2161
2162 if (!tx->send) continue;
2163 if (!--left) {
2164 return sprintf(page, "tx[%d]: 0x%lx-0x%lx "
2165 "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i,
2166 (unsigned long) (tx->send - eni_dev->ram),
2167 tx->send-eni_dev->ram+tx->words*4-1,tx->words*4,
2168 tx->reserved,tx->shaping,
2169 tx == eni_dev->ubr ? " (UBR)" : "");
2170 }
2171 if (--left) continue;
2172 return sprintf(page,"%10sbacklog %u packets\n","",
2173 skb_queue_len(&tx->backlog));
2174 }
2175 read_lock(&vcc_sklist_lock);
2176 for(i = 0; i < VCC_HTABLE_SIZE; ++i) {
2177 struct hlist_head *head = &vcc_hash[i];
2178
2179 sk_for_each(s, head) {
2180 struct eni_vcc *eni_vcc;
2181 int length;
2182
2183 vcc = atm_sk(s);
2184 if (vcc->dev != dev)
2185 continue;
2186 eni_vcc = ENI_VCC(vcc);
2187 if (--left) continue;
2188 length = sprintf(page,"vcc %4d: ",vcc->vci);
2189 if (eni_vcc->rx) {
2190 length += sprintf(page+length, "0x%lx-0x%lx "
2191 "(%6ld bytes)",
2192 (unsigned long) (eni_vcc->recv - eni_dev->ram),
2193 eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1,
2194 eni_vcc->words*4);
2195 if (eni_vcc->tx) length += sprintf(page+length,", ");
2196 }
2197 if (eni_vcc->tx)
2198 length += sprintf(page+length,"tx[%d], txing %d bytes",
2199 eni_vcc->tx->index,eni_vcc->txing);
2200 page[length] = '\n';
2201 read_unlock(&vcc_sklist_lock);
2202 return length+1;
2203 }
2204 }
2205 read_unlock(&vcc_sklist_lock);
2206 for (i = 0; i < eni_dev->free_len; i++) {
2207 struct eni_free *fe = eni_dev->free_list+i;
2208 unsigned long offset;
2209
2210 if (--left) continue;
2211 offset = (unsigned long) eni_dev->ram+eni_dev->base_diff;
2212 return sprintf(page,"free %p-%p (%6d bytes)\n",
2213 fe->start-offset,fe->start-offset+(1 << fe->order)-1,
2214 1 << fe->order);
2215 }
2216 return 0;
2217}
2218
2219
2220static const struct atmdev_ops ops = {
2221 .open = eni_open,
2222 .close = eni_close,
2223 .ioctl = eni_ioctl,
2224 .getsockopt = eni_getsockopt,
2225 .setsockopt = eni_setsockopt,
2226 .send = eni_send,
2227 .phy_put = eni_phy_put,
2228 .phy_get = eni_phy_get,
2229 .change_qos = eni_change_qos,
2230 .proc_read = eni_proc_read
2231};
2232
2233
2234static int eni_init_one(struct pci_dev *pci_dev,
2235 const struct pci_device_id *ent)
2236{
2237 struct atm_dev *dev;
2238 struct eni_dev *eni_dev;
2239 struct eni_zero *zero;
2240 int rc;
2241
2242 rc = pci_enable_device(pci_dev);
2243 if (rc < 0)
2244 goto out;
2245
2246 rc = dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(32));
2247 if (rc < 0)
2248 goto out;
2249
2250 rc = -ENOMEM;
2251 eni_dev = kmalloc(sizeof(struct eni_dev), GFP_KERNEL);
2252 if (!eni_dev)
2253 goto err_disable;
2254
2255 zero = &eni_dev->zero;
2256 zero->addr = dma_alloc_coherent(&pci_dev->dev,
2257 ENI_ZEROES_SIZE, &zero->dma, GFP_KERNEL);
2258 if (!zero->addr)
2259 goto err_kfree;
2260
2261 dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL);
2262 if (!dev)
2263 goto err_free_consistent;
2264
2265 dev->dev_data = eni_dev;
2266 pci_set_drvdata(pci_dev, dev);
2267 eni_dev->pci_dev = pci_dev;
2268 eni_dev->asic = ent->driver_data;
2269
2270 rc = eni_do_init(dev);
2271 if (rc < 0)
2272 goto err_unregister;
2273
2274 rc = eni_start(dev);
2275 if (rc < 0)
2276 goto err_eni_release;
2277
2278 eni_dev->more = eni_boards;
2279 eni_boards = dev;
2280out:
2281 return rc;
2282
2283err_eni_release:
2284 eni_do_release(dev);
2285err_unregister:
2286 atm_dev_deregister(dev);
2287err_free_consistent:
2288 dma_free_coherent(&pci_dev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2289err_kfree:
2290 kfree(eni_dev);
2291err_disable:
2292 pci_disable_device(pci_dev);
2293 goto out;
2294}
2295
2296
2297static const struct pci_device_id eni_pci_tbl[] = {
2298 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_FPGA), 0 /* FPGA */ },
2299 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_ASIC), 1 /* ASIC */ },
2300 { 0, }
2301};
2302MODULE_DEVICE_TABLE(pci,eni_pci_tbl);
2303
2304
2305static void eni_remove_one(struct pci_dev *pdev)
2306{
2307 struct atm_dev *dev = pci_get_drvdata(pdev);
2308 struct eni_dev *ed = ENI_DEV(dev);
2309 struct eni_zero *zero = &ed->zero;
2310
2311 eni_do_release(dev);
2312 atm_dev_deregister(dev);
2313 dma_free_coherent(&pdev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2314 kfree(ed);
2315 pci_disable_device(pdev);
2316}
2317
2318
2319static struct pci_driver eni_driver = {
2320 .name = DEV_LABEL,
2321 .id_table = eni_pci_tbl,
2322 .probe = eni_init_one,
2323 .remove = eni_remove_one,
2324};
2325
2326
2327static int __init eni_init(void)
2328{
2329 struct sk_buff *skb; /* dummy for sizeof */
2330
2331 BUILD_BUG_ON(sizeof(skb->cb) < sizeof(struct eni_skb_prv));
2332 return pci_register_driver(&eni_driver);
2333}
2334
2335
2336module_init(eni_init);
2337/* @@@ since exit routine not defined, this module can not be unloaded */
2338
2339MODULE_LICENSE("GPL");