1 /* drivers/atm/eni.c - Efficient Networks ENI155P device driver */
2
3 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
4
5
6 #include <linux/module.h>
7 #include <linux/kernel.h>
8 #include <linux/mm.h>
9 #include <linux/pci.h>
10 #include <linux/errno.h>
11 #include <linux/atm.h>
12 #include <linux/atmdev.h>
13 #include <linux/sonet.h>
14 #include <linux/skbuff.h>
15 #include <linux/time.h>
16 #include <linux/delay.h>
17 #include <linux/uio.h>
18 #include <linux/init.h>
19 #include <linux/atm_eni.h>
20 #include <linux/bitops.h>
21 #include <linux/slab.h>
22 #include <asm/io.h>
23 #include <linux/atomic.h>
24 #include <asm/uaccess.h>
25 #include <asm/string.h>
26 #include <asm/byteorder.h>
27
28 #include "tonga.h"
29 #include "midway.h"
30 #include "suni.h"
31 #include "eni.h"
32
33 #if !defined(__i386__) && !defined(__x86_64__)
34 #ifndef ioremap_nocache
35 #define ioremap_nocache(X,Y) ioremap(X,Y)
36 #endif
37 #endif
38
39 /*
40 * TODO:
41 *
42 * Show stoppers
43 * none
44 *
45 * Minor
46 * - OAM support
47 * - fix bugs listed below
48 */
49
50 /*
51 * KNOWN BUGS:
52 *
53 * - may run into JK-JK bug and deadlock
54 * - should allocate UBR channel first
55 * - buffer space allocation algorithm is stupid
56 * (RX: should be maxSDU+maxdelay*rate
57 * TX: should be maxSDU+min(maxSDU,maxdelay*rate) )
58 * - doesn't support OAM cells
59 * - eni_put_free may hang if not putting memory fragments that _complete_
60 * 2^n block (never happens in real life, though)
61 */
62
63
64 #if 0
65 #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
66 #else
67 #define DPRINTK(format,args...)
68 #endif
69
70
71 #ifndef CONFIG_ATM_ENI_TUNE_BURST
72 #define CONFIG_ATM_ENI_BURST_TX_8W
73 #define CONFIG_ATM_ENI_BURST_RX_4W
74 #endif
75
76
77 #ifndef CONFIG_ATM_ENI_DEBUG
78
79
80 #define NULLCHECK(x)
81
82 #define EVENT(s,a,b)
83
84
event_dump(void)85 static void event_dump(void)
86 {
87 }
88
89
90 #else
91
92
93 /*
94 * NULL pointer checking
95 */
96
97 #define NULLCHECK(x) \
98 if ((unsigned long) (x) < 0x30) \
99 printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x))
100
101 /*
102 * Very extensive activity logging. Greatly improves bug detection speed but
103 * costs a few Mbps if enabled.
104 */
105
106 #define EV 64
107
108 static const char *ev[EV];
109 static unsigned long ev_a[EV],ev_b[EV];
110 static int ec = 0;
111
112
EVENT(const char * s,unsigned long a,unsigned long b)113 static void EVENT(const char *s,unsigned long a,unsigned long b)
114 {
115 ev[ec] = s;
116 ev_a[ec] = a;
117 ev_b[ec] = b;
118 ec = (ec+1) % EV;
119 }
120
121
event_dump(void)122 static void event_dump(void)
123 {
124 int n,i;
125
126 for (n = 0; n < EV; n++) {
127 i = (ec+n) % EV;
128 printk(KERN_NOTICE);
129 printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]);
130 }
131 }
132
133
134 #endif /* CONFIG_ATM_ENI_DEBUG */
135
136
137 /*
138 * NExx must not be equal at end
139 * EExx may be equal at end
140 * xxPJOK verify validity of pointer jumps
141 * xxPMOK operating on a circular buffer of "c" words
142 */
143
144 #define NEPJOK(a0,a1,b) \
145 ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1))
146 #define EEPJOK(a0,a1,b) \
147 ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1))
148 #define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b)
149 #define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b)
150
151
152 static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0,
153 backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0,
154 putting = 0;
155
156 static struct atm_dev *eni_boards = NULL;
157
158 /* Read/write registers on card */
159 #define eni_in(r) readl(eni_dev->reg+(r)*4)
160 #define eni_out(v,r) writel((v),eni_dev->reg+(r)*4)
161
162
163 /*-------------------------------- utilities --------------------------------*/
164
165
dump_mem(struct eni_dev * eni_dev)166 static void dump_mem(struct eni_dev *eni_dev)
167 {
168 int i;
169
170 for (i = 0; i < eni_dev->free_len; i++)
171 printk(KERN_DEBUG " %d: %p %d\n",i,
172 eni_dev->free_list[i].start,
173 1 << eni_dev->free_list[i].order);
174 }
175
176
dump(struct atm_dev * dev)177 static void dump(struct atm_dev *dev)
178 {
179 struct eni_dev *eni_dev;
180
181 int i;
182
183 eni_dev = ENI_DEV(dev);
184 printk(KERN_NOTICE "Free memory\n");
185 dump_mem(eni_dev);
186 printk(KERN_NOTICE "TX buffers\n");
187 for (i = 0; i < NR_CHAN; i++)
188 if (eni_dev->tx[i].send)
189 printk(KERN_NOTICE " TX %d @ %p: %ld\n",i,
190 eni_dev->tx[i].send,eni_dev->tx[i].words*4);
191 printk(KERN_NOTICE "RX buffers\n");
192 for (i = 0; i < 1024; i++)
193 if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx)
194 printk(KERN_NOTICE " RX %d @ %p: %ld\n",i,
195 ENI_VCC(eni_dev->rx_map[i])->recv,
196 ENI_VCC(eni_dev->rx_map[i])->words*4);
197 printk(KERN_NOTICE "----\n");
198 }
199
200
eni_put_free(struct eni_dev * eni_dev,void __iomem * start,unsigned long size)201 static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start,
202 unsigned long size)
203 {
204 struct eni_free *list;
205 int len,order;
206
207 DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size);
208 start += eni_dev->base_diff;
209 list = eni_dev->free_list;
210 len = eni_dev->free_len;
211 while (size) {
212 if (len >= eni_dev->free_list_size) {
213 printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n",
214 start,size);
215 break;
216 }
217 for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++);
218 if (MID_MIN_BUF_SIZE > (1 << order)) {
219 printk(KERN_CRIT "eni_put_free: order %d too small\n",
220 order);
221 break;
222 }
223 list[len].start = (void __iomem *) start;
224 list[len].order = order;
225 len++;
226 start += 1 << order;
227 size -= 1 << order;
228 }
229 eni_dev->free_len = len;
230 /*dump_mem(eni_dev);*/
231 }
232
233
eni_alloc_mem(struct eni_dev * eni_dev,unsigned long * size)234 static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size)
235 {
236 struct eni_free *list;
237 void __iomem *start;
238 int len,i,order,best_order,index;
239
240 list = eni_dev->free_list;
241 len = eni_dev->free_len;
242 if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE;
243 if (*size > MID_MAX_BUF_SIZE) return NULL;
244 for (order = 0; (1 << order) < *size; order++);
245 DPRINTK("trying: %ld->%d\n",*size,order);
246 best_order = 65; /* we don't have more than 2^64 of anything ... */
247 index = 0; /* silence GCC */
248 for (i = 0; i < len; i++)
249 if (list[i].order == order) {
250 best_order = order;
251 index = i;
252 break;
253 }
254 else if (best_order > list[i].order && list[i].order > order) {
255 best_order = list[i].order;
256 index = i;
257 }
258 if (best_order == 65) return NULL;
259 start = list[index].start-eni_dev->base_diff;
260 list[index] = list[--len];
261 eni_dev->free_len = len;
262 *size = 1 << order;
263 eni_put_free(eni_dev,start+*size,(1 << best_order)-*size);
264 DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start);
265 memset_io(start,0,*size); /* never leak data */
266 /*dump_mem(eni_dev);*/
267 return start;
268 }
269
270
eni_free_mem(struct eni_dev * eni_dev,void __iomem * start,unsigned long size)271 static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start,
272 unsigned long size)
273 {
274 struct eni_free *list;
275 int len,i,order;
276
277 start += eni_dev->base_diff;
278 list = eni_dev->free_list;
279 len = eni_dev->free_len;
280 for (order = -1; size; order++) size >>= 1;
281 DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order);
282 for (i = 0; i < len; i++)
283 if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) &&
284 list[i].order == order) {
285 DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i,
286 list[i].start,start,1 << order,list[i].order,order);
287 list[i] = list[--len];
288 start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order));
289 order++;
290 i = -1;
291 continue;
292 }
293 if (len >= eni_dev->free_list_size) {
294 printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start,
295 order);
296 return;
297 }
298 list[len].start = start;
299 list[len].order = order;
300 eni_dev->free_len = len+1;
301 /*dump_mem(eni_dev);*/
302 }
303
304
305 /*----------------------------------- RX ------------------------------------*/
306
307
308 #define ENI_VCC_NOS ((struct atm_vcc *) 1)
309
310
rx_ident_err(struct atm_vcc * vcc)311 static void rx_ident_err(struct atm_vcc *vcc)
312 {
313 struct atm_dev *dev;
314 struct eni_dev *eni_dev;
315 struct eni_vcc *eni_vcc;
316
317 dev = vcc->dev;
318 eni_dev = ENI_DEV(dev);
319 /* immediately halt adapter */
320 eni_out(eni_in(MID_MC_S) &
321 ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S);
322 /* dump useful information */
323 eni_vcc = ENI_VCC(vcc);
324 printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident "
325 "mismatch\n",dev->number);
326 printk(KERN_ALERT " VCI %d, rxing %d, words %ld\n",vcc->vci,
327 eni_vcc->rxing,eni_vcc->words);
328 printk(KERN_ALERT " host descr 0x%lx, rx pos 0x%lx, descr value "
329 "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos,
330 (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4));
331 printk(KERN_ALERT " last %p, servicing %d\n",eni_vcc->last,
332 eni_vcc->servicing);
333 EVENT("---dump ends here---\n",0,0);
334 printk(KERN_NOTICE "---recent events---\n");
335 event_dump();
336 ENI_DEV(dev)->fast = NULL; /* really stop it */
337 ENI_DEV(dev)->slow = NULL;
338 skb_queue_head_init(&ENI_DEV(dev)->rx_queue);
339 }
340
341
do_rx_dma(struct atm_vcc * vcc,struct sk_buff * skb,unsigned long skip,unsigned long size,unsigned long eff)342 static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb,
343 unsigned long skip,unsigned long size,unsigned long eff)
344 {
345 struct eni_dev *eni_dev;
346 struct eni_vcc *eni_vcc;
347 u32 dma_rd,dma_wr;
348 u32 dma[RX_DMA_BUF*2];
349 dma_addr_t paddr;
350 unsigned long here;
351 int i,j;
352
353 eni_dev = ENI_DEV(vcc->dev);
354 eni_vcc = ENI_VCC(vcc);
355 paddr = 0; /* GCC, shut up */
356 if (skb) {
357 paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len,
358 PCI_DMA_FROMDEVICE);
359 ENI_PRV_PADDR(skb) = paddr;
360 if (paddr & 3)
361 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has "
362 "mis-aligned RX data (0x%lx)\n",vcc->dev->number,
363 vcc->vci,(unsigned long) paddr);
364 ENI_PRV_SIZE(skb) = size+skip;
365 /* PDU plus descriptor */
366 ATM_SKB(skb)->vcc = vcc;
367 }
368 j = 0;
369 if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */
370 here = (eni_vcc->descr+skip) & (eni_vcc->words-1);
371 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci
372 << MID_DMA_VCI_SHIFT) | MID_DT_JK;
373 j++;
374 }
375 here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1);
376 if (!eff) size += skip;
377 else {
378 unsigned long words;
379
380 if (!size) {
381 DPRINTK("strange things happen ...\n");
382 EVENT("strange things happen ... (skip=%ld,eff=%ld)\n",
383 size,eff);
384 }
385 words = eff;
386 if (paddr & 15) {
387 unsigned long init;
388
389 init = 4-((paddr & 15) >> 2);
390 if (init > words) init = words;
391 dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
392 (vcc->vci << MID_DMA_VCI_SHIFT);
393 dma[j++] = paddr;
394 paddr += init << 2;
395 words -= init;
396 }
397 #ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */
398 if (words & ~15) {
399 dma[j++] = MID_DT_16W | ((words >> 4) <<
400 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
401 MID_DMA_VCI_SHIFT);
402 dma[j++] = paddr;
403 paddr += (words & ~15) << 2;
404 words &= 15;
405 }
406 #endif
407 #ifdef CONFIG_ATM_ENI_BURST_RX_8W /* works only with *some* PCI chipsets ... */
408 if (words & ~7) {
409 dma[j++] = MID_DT_8W | ((words >> 3) <<
410 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
411 MID_DMA_VCI_SHIFT);
412 dma[j++] = paddr;
413 paddr += (words & ~7) << 2;
414 words &= 7;
415 }
416 #endif
417 #ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */
418 if (words & ~3) {
419 dma[j++] = MID_DT_4W | ((words >> 2) <<
420 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
421 MID_DMA_VCI_SHIFT);
422 dma[j++] = paddr;
423 paddr += (words & ~3) << 2;
424 words &= 3;
425 }
426 #endif
427 #ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */
428 if (words & ~1) {
429 dma[j++] = MID_DT_2W | ((words >> 1) <<
430 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
431 MID_DMA_VCI_SHIFT);
432 dma[j++] = paddr;
433 paddr += (words & ~1) << 2;
434 words &= 1;
435 }
436 #endif
437 if (words) {
438 dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT)
439 | (vcc->vci << MID_DMA_VCI_SHIFT);
440 dma[j++] = paddr;
441 }
442 }
443 if (size != eff) {
444 dma[j++] = (here << MID_DMA_COUNT_SHIFT) |
445 (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK;
446 j++;
447 }
448 if (!j || j > 2*RX_DMA_BUF) {
449 printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n");
450 goto trouble;
451 }
452 dma[j-2] |= MID_DMA_END;
453 j = j >> 1;
454 dma_wr = eni_in(MID_DMA_WR_RX);
455 dma_rd = eni_in(MID_DMA_RD_RX);
456 /*
457 * Can I move the dma_wr pointer by 2j+1 positions without overwriting
458 * data that hasn't been read (position of dma_rd) yet ?
459 */
460 if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */
461 printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n",
462 vcc->dev->number);
463 goto trouble;
464 }
465 for (i = 0; i < j; i++) {
466 writel(dma[i*2],eni_dev->rx_dma+dma_wr*8);
467 writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4);
468 dma_wr = (dma_wr+1) & (NR_DMA_RX-1);
469 }
470 if (skb) {
471 ENI_PRV_POS(skb) = eni_vcc->descr+size+1;
472 skb_queue_tail(&eni_dev->rx_queue,skb);
473 eni_vcc->last = skb;
474 rx_enqueued++;
475 }
476 eni_vcc->descr = here;
477 eni_out(dma_wr,MID_DMA_WR_RX);
478 return 0;
479
480 trouble:
481 if (paddr)
482 pci_unmap_single(eni_dev->pci_dev,paddr,skb->len,
483 PCI_DMA_FROMDEVICE);
484 if (skb) dev_kfree_skb_irq(skb);
485 return -1;
486 }
487
488
discard(struct atm_vcc * vcc,unsigned long size)489 static void discard(struct atm_vcc *vcc,unsigned long size)
490 {
491 struct eni_vcc *eni_vcc;
492
493 eni_vcc = ENI_VCC(vcc);
494 EVENT("discard (size=%ld)\n",size,0);
495 while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0);
496 /* could do a full fallback, but that might be more expensive */
497 if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1;
498 else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1);
499 }
500
501
502 /*
503 * TODO: should check whether direct copies (without DMA setup, dequeuing on
504 * interrupt, etc.) aren't much faster for AAL0
505 */
506
rx_aal0(struct atm_vcc * vcc)507 static int rx_aal0(struct atm_vcc *vcc)
508 {
509 struct eni_vcc *eni_vcc;
510 unsigned long descr;
511 unsigned long length;
512 struct sk_buff *skb;
513
514 DPRINTK(">rx_aal0\n");
515 eni_vcc = ENI_VCC(vcc);
516 descr = readl(eni_vcc->recv+eni_vcc->descr*4);
517 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
518 rx_ident_err(vcc);
519 return 1;
520 }
521 if (descr & MID_RED_T) {
522 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
523 vcc->dev->number);
524 length = 0;
525 atomic_inc(&vcc->stats->rx_err);
526 }
527 else {
528 length = ATM_CELL_SIZE-1; /* no HEC */
529 }
530 skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL;
531 if (!skb) {
532 discard(vcc,length >> 2);
533 return 0;
534 }
535 skb_put(skb,length);
536 skb->tstamp = eni_vcc->timestamp;
537 DPRINTK("got len %ld\n",length);
538 if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1;
539 eni_vcc->rxing++;
540 return 0;
541 }
542
543
rx_aal5(struct atm_vcc * vcc)544 static int rx_aal5(struct atm_vcc *vcc)
545 {
546 struct eni_vcc *eni_vcc;
547 unsigned long descr;
548 unsigned long size,eff,length;
549 struct sk_buff *skb;
550
551 EVENT("rx_aal5\n",0,0);
552 DPRINTK(">rx_aal5\n");
553 eni_vcc = ENI_VCC(vcc);
554 descr = readl(eni_vcc->recv+eni_vcc->descr*4);
555 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
556 rx_ident_err(vcc);
557 return 1;
558 }
559 if (descr & (MID_RED_T | MID_RED_CRC_ERR)) {
560 if (descr & MID_RED_T) {
561 EVENT("empty cell (descr=0x%lx)\n",descr,0);
562 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
563 vcc->dev->number);
564 size = 0;
565 }
566 else {
567 static unsigned long silence = 0;
568
569 if (time_after(jiffies, silence) || silence == 0) {
570 printk(KERN_WARNING DEV_LABEL "(itf %d): "
571 "discarding PDU(s) with CRC error\n",
572 vcc->dev->number);
573 silence = (jiffies+2*HZ)|1;
574 }
575 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
576 EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr,
577 size);
578 }
579 eff = length = 0;
580 atomic_inc(&vcc->stats->rx_err);
581 }
582 else {
583 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
584 DPRINTK("size=%ld\n",size);
585 length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) &
586 (eni_vcc->words-1)))*4) & 0xffff;
587 /* -trailer(2)+header(1) */
588 if (length && length <= (size << 2)-8 && length <=
589 ATM_MAX_AAL5_PDU) eff = (length+3) >> 2;
590 else { /* ^ trailer length (8) */
591 EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr,
592 length);
593 printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU "
594 "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n",
595 vcc->dev->number,vcc->vci,length,size << 2,descr);
596 length = eff = 0;
597 atomic_inc(&vcc->stats->rx_err);
598 }
599 }
600 skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL;
601 if (!skb) {
602 discard(vcc,size);
603 return 0;
604 }
605 skb_put(skb,length);
606 DPRINTK("got len %ld\n",length);
607 if (do_rx_dma(vcc,skb,1,size,eff)) return 1;
608 eni_vcc->rxing++;
609 return 0;
610 }
611
612
rx_vcc(struct atm_vcc * vcc)613 static inline int rx_vcc(struct atm_vcc *vcc)
614 {
615 void __iomem *vci_dsc;
616 unsigned long tmp;
617 struct eni_vcc *eni_vcc;
618
619 eni_vcc = ENI_VCC(vcc);
620 vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16;
621 EVENT("rx_vcc(1)\n",0,0);
622 while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >>
623 MID_VCI_DESCR_SHIFT)) {
624 EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n",
625 eni_vcc->descr,tmp);
626 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
627 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
628 MID_VCI_DESCR_SHIFT));
629 if (ENI_VCC(vcc)->rx(vcc)) return 1;
630 }
631 /* clear IN_SERVICE flag */
632 writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc);
633 /*
634 * If new data has arrived between evaluating the while condition and
635 * clearing IN_SERVICE, we wouldn't be notified until additional data
636 * follows. So we have to loop again to be sure.
637 */
638 EVENT("rx_vcc(3)\n",0,0);
639 while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR)
640 >> MID_VCI_DESCR_SHIFT)) {
641 EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n",
642 eni_vcc->descr,tmp);
643 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
644 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
645 MID_VCI_DESCR_SHIFT));
646 if (ENI_VCC(vcc)->rx(vcc)) return 1;
647 }
648 return 0;
649 }
650
651
poll_rx(struct atm_dev * dev)652 static void poll_rx(struct atm_dev *dev)
653 {
654 struct eni_dev *eni_dev;
655 struct atm_vcc *curr;
656
657 eni_dev = ENI_DEV(dev);
658 while ((curr = eni_dev->fast)) {
659 EVENT("poll_rx.fast\n",0,0);
660 if (rx_vcc(curr)) return;
661 eni_dev->fast = ENI_VCC(curr)->next;
662 ENI_VCC(curr)->next = ENI_VCC_NOS;
663 barrier();
664 ENI_VCC(curr)->servicing--;
665 }
666 while ((curr = eni_dev->slow)) {
667 EVENT("poll_rx.slow\n",0,0);
668 if (rx_vcc(curr)) return;
669 eni_dev->slow = ENI_VCC(curr)->next;
670 ENI_VCC(curr)->next = ENI_VCC_NOS;
671 barrier();
672 ENI_VCC(curr)->servicing--;
673 }
674 }
675
676
get_service(struct atm_dev * dev)677 static void get_service(struct atm_dev *dev)
678 {
679 struct eni_dev *eni_dev;
680 struct atm_vcc *vcc;
681 unsigned long vci;
682
683 DPRINTK(">get_service\n");
684 eni_dev = ENI_DEV(dev);
685 while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) {
686 vci = readl(eni_dev->service+eni_dev->serv_read*4);
687 eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1);
688 vcc = eni_dev->rx_map[vci & 1023];
689 if (!vcc) {
690 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not "
691 "found\n",dev->number,vci);
692 continue; /* nasty but we try to go on anyway */
693 /* @@@ nope, doesn't work */
694 }
695 EVENT("getting from service\n",0,0);
696 if (ENI_VCC(vcc)->next != ENI_VCC_NOS) {
697 EVENT("double service\n",0,0);
698 DPRINTK("Grr, servicing VCC %ld twice\n",vci);
699 continue;
700 }
701 ENI_VCC(vcc)->timestamp = ktime_get_real();
702 ENI_VCC(vcc)->next = NULL;
703 if (vcc->qos.rxtp.traffic_class == ATM_CBR) {
704 if (eni_dev->fast)
705 ENI_VCC(eni_dev->last_fast)->next = vcc;
706 else eni_dev->fast = vcc;
707 eni_dev->last_fast = vcc;
708 }
709 else {
710 if (eni_dev->slow)
711 ENI_VCC(eni_dev->last_slow)->next = vcc;
712 else eni_dev->slow = vcc;
713 eni_dev->last_slow = vcc;
714 }
715 putting++;
716 ENI_VCC(vcc)->servicing++;
717 }
718 }
719
720
dequeue_rx(struct atm_dev * dev)721 static void dequeue_rx(struct atm_dev *dev)
722 {
723 struct eni_dev *eni_dev;
724 struct eni_vcc *eni_vcc;
725 struct atm_vcc *vcc;
726 struct sk_buff *skb;
727 void __iomem *vci_dsc;
728 int first;
729
730 eni_dev = ENI_DEV(dev);
731 first = 1;
732 while (1) {
733 skb = skb_dequeue(&eni_dev->rx_queue);
734 if (!skb) {
735 if (first) {
736 DPRINTK(DEV_LABEL "(itf %d): RX but not "
737 "rxing\n",dev->number);
738 EVENT("nothing to dequeue\n",0,0);
739 }
740 break;
741 }
742 EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb),
743 ENI_PRV_POS(skb));
744 rx_dequeued++;
745 vcc = ATM_SKB(skb)->vcc;
746 eni_vcc = ENI_VCC(vcc);
747 first = 0;
748 vci_dsc = eni_dev->vci+vcc->vci*16;
749 if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb),
750 (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT,
751 eni_vcc->words)) {
752 EVENT("requeuing\n",0,0);
753 skb_queue_head(&eni_dev->rx_queue,skb);
754 break;
755 }
756 eni_vcc->rxing--;
757 eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1);
758 pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len,
759 PCI_DMA_TODEVICE);
760 if (!skb->len) dev_kfree_skb_irq(skb);
761 else {
762 EVENT("pushing (len=%ld)\n",skb->len,0);
763 if (vcc->qos.aal == ATM_AAL0)
764 *(unsigned long *) skb->data =
765 ntohl(*(unsigned long *) skb->data);
766 memset(skb->cb,0,sizeof(struct eni_skb_prv));
767 vcc->push(vcc,skb);
768 pushed++;
769 }
770 atomic_inc(&vcc->stats->rx);
771 }
772 wake_up(&eni_dev->rx_wait);
773 }
774
775
open_rx_first(struct atm_vcc * vcc)776 static int open_rx_first(struct atm_vcc *vcc)
777 {
778 struct eni_dev *eni_dev;
779 struct eni_vcc *eni_vcc;
780 unsigned long size;
781
782 DPRINTK("open_rx_first\n");
783 eni_dev = ENI_DEV(vcc->dev);
784 eni_vcc = ENI_VCC(vcc);
785 eni_vcc->rx = NULL;
786 if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0;
787 size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100;
788 if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <=
789 MID_MAX_BUF_SIZE)
790 size = MID_MAX_BUF_SIZE;
791 eni_vcc->recv = eni_alloc_mem(eni_dev,&size);
792 DPRINTK("rx at 0x%lx\n",eni_vcc->recv);
793 eni_vcc->words = size >> 2;
794 if (!eni_vcc->recv) return -ENOBUFS;
795 eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0;
796 eni_vcc->descr = 0;
797 eni_vcc->rx_pos = 0;
798 eni_vcc->rxing = 0;
799 eni_vcc->servicing = 0;
800 eni_vcc->next = ENI_VCC_NOS;
801 return 0;
802 }
803
804
open_rx_second(struct atm_vcc * vcc)805 static int open_rx_second(struct atm_vcc *vcc)
806 {
807 void __iomem *here;
808 struct eni_dev *eni_dev;
809 struct eni_vcc *eni_vcc;
810 unsigned long size;
811 int order;
812
813 DPRINTK("open_rx_second\n");
814 eni_dev = ENI_DEV(vcc->dev);
815 eni_vcc = ENI_VCC(vcc);
816 if (!eni_vcc->rx) return 0;
817 /* set up VCI descriptor */
818 here = eni_dev->vci+vcc->vci*16;
819 DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4);
820 size = eni_vcc->words >> 8;
821 for (order = -1; size; order++) size >>= 1;
822 writel(0,here+4); /* descr, read = 0 */
823 writel(0,here+8); /* write, state, count = 0 */
824 if (eni_dev->rx_map[vcc->vci])
825 printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already "
826 "in use\n",vcc->dev->number,vcc->vci);
827 eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */
828 writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) <<
829 MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE |
830 (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) <<
831 MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here);
832 return 0;
833 }
834
835
close_rx(struct atm_vcc * vcc)836 static void close_rx(struct atm_vcc *vcc)
837 {
838 DECLARE_WAITQUEUE(wait,current);
839 void __iomem *here;
840 struct eni_dev *eni_dev;
841 struct eni_vcc *eni_vcc;
842
843 eni_vcc = ENI_VCC(vcc);
844 if (!eni_vcc->rx) return;
845 eni_dev = ENI_DEV(vcc->dev);
846 if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) {
847 here = eni_dev->vci+vcc->vci*16;
848 /* block receiver */
849 writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH <<
850 MID_VCI_MODE_SHIFT),here);
851 /* wait for receiver to become idle */
852 udelay(27);
853 /* discard pending cell */
854 writel(readl(here) & ~MID_VCI_IN_SERVICE,here);
855 /* don't accept any new ones */
856 eni_dev->rx_map[vcc->vci] = NULL;
857 /* wait for RX queue to drain */
858 DPRINTK("eni_close: waiting for RX ...\n");
859 EVENT("RX closing\n",0,0);
860 add_wait_queue(&eni_dev->rx_wait,&wait);
861 set_current_state(TASK_UNINTERRUPTIBLE);
862 barrier();
863 for (;;) {
864 /* transition service->rx: rxing++, servicing-- */
865 if (!eni_vcc->servicing) {
866 barrier();
867 if (!eni_vcc->rxing) break;
868 }
869 EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing,
870 eni_vcc->servicing);
871 printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing,
872 eni_vcc->rxing);
873 schedule();
874 set_current_state(TASK_UNINTERRUPTIBLE);
875 }
876 for (;;) {
877 int at_end;
878 u32 tmp;
879
880 tasklet_disable(&eni_dev->task);
881 tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ;
882 at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT;
883 tasklet_enable(&eni_dev->task);
884 if (at_end) break;
885 EVENT("drain discard (host 0x%lx, nic 0x%lx)\n",
886 eni_vcc->rx_pos,tmp);
887 printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n",
888 eni_vcc->rx_pos,tmp);
889 schedule();
890 set_current_state(TASK_UNINTERRUPTIBLE);
891 }
892 set_current_state(TASK_RUNNING);
893 remove_wait_queue(&eni_dev->rx_wait,&wait);
894 }
895 eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2);
896 eni_vcc->rx = NULL;
897 }
898
899
start_rx(struct atm_dev * dev)900 static int start_rx(struct atm_dev *dev)
901 {
902 struct eni_dev *eni_dev;
903
904 eni_dev = ENI_DEV(dev);
905 eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL);
906 if (!eni_dev->rx_map) {
907 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
908 dev->number);
909 free_page((unsigned long) eni_dev->free_list);
910 return -ENOMEM;
911 }
912 eni_dev->rx_mult = DEFAULT_RX_MULT;
913 eni_dev->fast = eni_dev->last_fast = NULL;
914 eni_dev->slow = eni_dev->last_slow = NULL;
915 init_waitqueue_head(&eni_dev->rx_wait);
916 skb_queue_head_init(&eni_dev->rx_queue);
917 eni_dev->serv_read = eni_in(MID_SERV_WRITE);
918 eni_out(0,MID_DMA_WR_RX);
919 return 0;
920 }
921
922
923 /*----------------------------------- TX ------------------------------------*/
924
925
926 enum enq_res { enq_ok,enq_next,enq_jam };
927
928
put_dma(int chan,u32 * dma,int * j,dma_addr_t paddr,u32 size)929 static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr,
930 u32 size)
931 {
932 u32 init,words;
933
934 DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size);
935 EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size);
936 #if 0 /* don't complain anymore */
937 if (paddr & 3)
938 printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr);
939 if (size & 3)
940 printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size);
941 #endif
942 if (paddr & 3) {
943 init = 4-(paddr & 3);
944 if (init > size || size < 7) init = size;
945 DPRINTK("put_dma: %lx DMA: %d/%d bytes\n",
946 (unsigned long) paddr,init,size);
947 dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) |
948 (chan << MID_DMA_CHAN_SHIFT);
949 dma[(*j)++] = paddr;
950 paddr += init;
951 size -= init;
952 }
953 words = size >> 2;
954 size &= 3;
955 if (words && (paddr & 31)) {
956 init = 8-((paddr & 31) >> 2);
957 if (init > words) init = words;
958 DPRINTK("put_dma: %lx DMA: %d/%d words\n",
959 (unsigned long) paddr,init,words);
960 dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
961 (chan << MID_DMA_CHAN_SHIFT);
962 dma[(*j)++] = paddr;
963 paddr += init << 2;
964 words -= init;
965 }
966 #ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */
967 if (words & ~15) {
968 DPRINTK("put_dma: %lx DMA: %d*16/%d words\n",
969 (unsigned long) paddr,words >> 4,words);
970 dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT)
971 | (chan << MID_DMA_CHAN_SHIFT);
972 dma[(*j)++] = paddr;
973 paddr += (words & ~15) << 2;
974 words &= 15;
975 }
976 #endif
977 #ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */
978 if (words & ~7) {
979 DPRINTK("put_dma: %lx DMA: %d*8/%d words\n",
980 (unsigned long) paddr,words >> 3,words);
981 dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT)
982 | (chan << MID_DMA_CHAN_SHIFT);
983 dma[(*j)++] = paddr;
984 paddr += (words & ~7) << 2;
985 words &= 7;
986 }
987 #endif
988 #ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */
989 if (words & ~3) {
990 DPRINTK("put_dma: %lx DMA: %d*4/%d words\n",
991 (unsigned long) paddr,words >> 2,words);
992 dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT)
993 | (chan << MID_DMA_CHAN_SHIFT);
994 dma[(*j)++] = paddr;
995 paddr += (words & ~3) << 2;
996 words &= 3;
997 }
998 #endif
999 #ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */
1000 if (words & ~1) {
1001 DPRINTK("put_dma: %lx DMA: %d*2/%d words\n",
1002 (unsigned long) paddr,words >> 1,words);
1003 dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT)
1004 | (chan << MID_DMA_CHAN_SHIFT);
1005 dma[(*j)++] = paddr;
1006 paddr += (words & ~1) << 2;
1007 words &= 1;
1008 }
1009 #endif
1010 if (words) {
1011 DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr,
1012 words);
1013 dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) |
1014 (chan << MID_DMA_CHAN_SHIFT);
1015 dma[(*j)++] = paddr;
1016 paddr += words << 2;
1017 }
1018 if (size) {
1019 DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr,
1020 size);
1021 dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) |
1022 (chan << MID_DMA_CHAN_SHIFT);
1023 dma[(*j)++] = paddr;
1024 }
1025 }
1026
1027
do_tx(struct sk_buff * skb)1028 static enum enq_res do_tx(struct sk_buff *skb)
1029 {
1030 struct atm_vcc *vcc;
1031 struct eni_dev *eni_dev;
1032 struct eni_vcc *eni_vcc;
1033 struct eni_tx *tx;
1034 dma_addr_t paddr;
1035 u32 dma_rd,dma_wr;
1036 u32 size; /* in words */
1037 int aal5,dma_size,i,j;
1038
1039 DPRINTK(">do_tx\n");
1040 NULLCHECK(skb);
1041 EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len);
1042 vcc = ATM_SKB(skb)->vcc;
1043 NULLCHECK(vcc);
1044 eni_dev = ENI_DEV(vcc->dev);
1045 NULLCHECK(eni_dev);
1046 eni_vcc = ENI_VCC(vcc);
1047 tx = eni_vcc->tx;
1048 NULLCHECK(tx);
1049 #if 0 /* Enable this for testing with the "align" program */
1050 {
1051 unsigned int hack = *((char *) skb->data)-'0';
1052
1053 if (hack < 8) {
1054 skb->data += hack;
1055 skb->len -= hack;
1056 }
1057 }
1058 #endif
1059 #if 0 /* should work now */
1060 if ((unsigned long) skb->data & 3)
1061 printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned "
1062 "TX data\n",vcc->dev->number,vcc->vci);
1063 #endif
1064 /*
1065 * Potential future IP speedup: make hard_header big enough to put
1066 * segmentation descriptor directly into PDU. Saves: 4 slave writes,
1067 * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-)
1068 */
1069
1070 aal5 = vcc->qos.aal == ATM_AAL5;
1071 /* check space in buffer */
1072 if (!aal5)
1073 size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE;
1074 /* cell without HEC plus segmentation header (includes
1075 four-byte cell header) */
1076 else {
1077 size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1;
1078 /* add AAL5 trailer */
1079 size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE;
1080 /* add segmentation header */
1081 }
1082 /*
1083 * Can I move tx_pos by size bytes without getting closer than TX_GAP
1084 * to the read pointer ? TX_GAP means to leave some space for what
1085 * the manual calls "too close".
1086 */
1087 if (!NEPMOK(tx->tx_pos,size+TX_GAP,
1088 eni_in(MID_TX_RDPTR(tx->index)),tx->words)) {
1089 DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n",
1090 vcc->dev->number,size);
1091 return enq_next;
1092 }
1093 /* check DMA */
1094 dma_wr = eni_in(MID_DMA_WR_TX);
1095 dma_rd = eni_in(MID_DMA_RD_TX);
1096 dma_size = 3; /* JK for descriptor and final fill, plus final size
1097 mis-alignment fix */
1098 DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags);
1099 if (!skb_shinfo(skb)->nr_frags) dma_size += 5;
1100 else dma_size += 5*(skb_shinfo(skb)->nr_frags+1);
1101 if (dma_size > TX_DMA_BUF) {
1102 printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries "
1103 "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF);
1104 }
1105 DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos);
1106 if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) <
1107 dma_size) {
1108 printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n",
1109 vcc->dev->number);
1110 return enq_jam;
1111 }
1112 paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len,
1113 PCI_DMA_TODEVICE);
1114 ENI_PRV_PADDR(skb) = paddr;
1115 /* prepare DMA queue entries */
1116 j = 0;
1117 eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) <<
1118 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1119 MID_DT_JK;
1120 j++;
1121 if (!skb_shinfo(skb)->nr_frags)
1122 if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len);
1123 else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4);
1124 else {
1125 DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */
1126 for (i = -1; i < skb_shinfo(skb)->nr_frags; i++)
1127 if (i == -1)
1128 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1129 skb->data,
1130 skb_headlen(skb));
1131 else
1132 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1133 skb_frag_page(&skb_shinfo(skb)->frags[i]) +
1134 skb_shinfo(skb)->frags[i].page_offset,
1135 skb_frag_size(&skb_shinfo(skb)->frags[i]));
1136 }
1137 if (skb->len & 3) {
1138 put_dma(tx->index, eni_dev->dma, &j, eni_dev->zero.dma,
1139 4 - (skb->len & 3));
1140 }
1141 /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */
1142 eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) <<
1143 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1144 MID_DMA_END | MID_DT_JK;
1145 j++;
1146 DPRINTK("DMA at end: %d\n",j);
1147 /* store frame */
1148 writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) |
1149 (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) |
1150 (tx->resolution << MID_SEG_RATE_SHIFT) |
1151 (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4);
1152 /*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/
1153 writel((vcc->vci << MID_SEG_VCI_SHIFT) |
1154 (aal5 ? 0 : (skb->data[3] & 0xf)) |
1155 (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0),
1156 tx->send+((tx->tx_pos+1) & (tx->words-1))*4);
1157 DPRINTK("size: %d, len:%d\n",size,skb->len);
1158 if (aal5)
1159 writel(skb->len,tx->send+
1160 ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4);
1161 j = j >> 1;
1162 for (i = 0; i < j; i++) {
1163 writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8);
1164 writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4);
1165 dma_wr = (dma_wr+1) & (NR_DMA_TX-1);
1166 }
1167 ENI_PRV_POS(skb) = tx->tx_pos;
1168 ENI_PRV_SIZE(skb) = size;
1169 ENI_VCC(vcc)->txing += size;
1170 tx->tx_pos = (tx->tx_pos+size) & (tx->words-1);
1171 DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos);
1172 eni_out(dma_wr,MID_DMA_WR_TX);
1173 skb_queue_tail(&eni_dev->tx_queue,skb);
1174 queued++;
1175 return enq_ok;
1176 }
1177
1178
poll_tx(struct atm_dev * dev)1179 static void poll_tx(struct atm_dev *dev)
1180 {
1181 struct eni_tx *tx;
1182 struct sk_buff *skb;
1183 enum enq_res res;
1184 int i;
1185
1186 DPRINTK(">poll_tx\n");
1187 for (i = NR_CHAN-1; i >= 0; i--) {
1188 tx = &ENI_DEV(dev)->tx[i];
1189 if (tx->send)
1190 while ((skb = skb_dequeue(&tx->backlog))) {
1191 res = do_tx(skb);
1192 if (res == enq_ok) continue;
1193 DPRINTK("re-queuing TX PDU\n");
1194 skb_queue_head(&tx->backlog,skb);
1195 requeued++;
1196 if (res == enq_jam) return;
1197 break;
1198 }
1199 }
1200 }
1201
1202
dequeue_tx(struct atm_dev * dev)1203 static void dequeue_tx(struct atm_dev *dev)
1204 {
1205 struct eni_dev *eni_dev;
1206 struct atm_vcc *vcc;
1207 struct sk_buff *skb;
1208 struct eni_tx *tx;
1209
1210 NULLCHECK(dev);
1211 eni_dev = ENI_DEV(dev);
1212 NULLCHECK(eni_dev);
1213 while ((skb = skb_dequeue(&eni_dev->tx_queue))) {
1214 vcc = ATM_SKB(skb)->vcc;
1215 NULLCHECK(vcc);
1216 tx = ENI_VCC(vcc)->tx;
1217 NULLCHECK(ENI_VCC(vcc)->tx);
1218 DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb),
1219 (unsigned) eni_in(MID_TX_DESCRSTART(tx->index)));
1220 if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) ==
1221 eni_in(MID_TX_DESCRSTART(tx->index))) {
1222 skb_queue_head(&eni_dev->tx_queue,skb);
1223 break;
1224 }
1225 ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb);
1226 pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len,
1227 PCI_DMA_TODEVICE);
1228 if (vcc->pop) vcc->pop(vcc,skb);
1229 else dev_kfree_skb_irq(skb);
1230 atomic_inc(&vcc->stats->tx);
1231 wake_up(&eni_dev->tx_wait);
1232 dma_complete++;
1233 }
1234 }
1235
1236
alloc_tx(struct eni_dev * eni_dev,int ubr)1237 static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr)
1238 {
1239 int i;
1240
1241 for (i = !ubr; i < NR_CHAN; i++)
1242 if (!eni_dev->tx[i].send) return eni_dev->tx+i;
1243 return NULL;
1244 }
1245
1246
comp_tx(struct eni_dev * eni_dev,int * pcr,int reserved,int * pre,int * res,int unlimited)1247 static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre,
1248 int *res,int unlimited)
1249 {
1250 static const int pre_div[] = { 4,16,128,2048 };
1251 /* 2^(((x+2)^2-(x+2))/2+1) */
1252
1253 if (unlimited) *pre = *res = 0;
1254 else {
1255 if (*pcr > 0) {
1256 int div;
1257
1258 for (*pre = 0; *pre < 3; (*pre)++)
1259 if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break;
1260 div = pre_div[*pre]**pcr;
1261 DPRINTK("min div %d\n",div);
1262 *res = TS_CLOCK/div-1;
1263 }
1264 else {
1265 int div;
1266
1267 if (!*pcr) *pcr = eni_dev->tx_bw+reserved;
1268 for (*pre = 3; *pre >= 0; (*pre)--)
1269 if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break;
1270 if (*pre < 3) (*pre)++; /* else fail later */
1271 div = pre_div[*pre]*-*pcr;
1272 DPRINTK("max div %d\n",div);
1273 *res = DIV_ROUND_UP(TS_CLOCK, div)-1;
1274 }
1275 if (*res < 0) *res = 0;
1276 if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE;
1277 }
1278 *pcr = TS_CLOCK/pre_div[*pre]/(*res+1);
1279 DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res);
1280 return 0;
1281 }
1282
1283
reserve_or_set_tx(struct atm_vcc * vcc,struct atm_trafprm * txtp,int set_rsv,int set_shp)1284 static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp,
1285 int set_rsv,int set_shp)
1286 {
1287 struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1288 struct eni_vcc *eni_vcc = ENI_VCC(vcc);
1289 struct eni_tx *tx;
1290 unsigned long size;
1291 void __iomem *mem;
1292 int rate,ubr,unlimited,new_tx;
1293 int pre,res,order;
1294 int error;
1295
1296 rate = atm_pcr_goal(txtp);
1297 ubr = txtp->traffic_class == ATM_UBR;
1298 unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR ||
1299 rate >= ATM_OC3_PCR);
1300 if (!unlimited) {
1301 size = txtp->max_sdu*eni_dev->tx_mult/100;
1302 if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <=
1303 MID_MAX_BUF_SIZE)
1304 size = MID_MAX_BUF_SIZE;
1305 }
1306 else {
1307 if (eni_dev->ubr) {
1308 eni_vcc->tx = eni_dev->ubr;
1309 txtp->pcr = ATM_OC3_PCR;
1310 return 0;
1311 }
1312 size = UBR_BUFFER;
1313 }
1314 new_tx = !eni_vcc->tx;
1315 mem = NULL; /* for gcc */
1316 if (!new_tx) tx = eni_vcc->tx;
1317 else {
1318 mem = eni_alloc_mem(eni_dev,&size);
1319 if (!mem) return -ENOBUFS;
1320 tx = alloc_tx(eni_dev,unlimited);
1321 if (!tx) {
1322 eni_free_mem(eni_dev,mem,size);
1323 return -EBUSY;
1324 }
1325 DPRINTK("got chan %d\n",tx->index);
1326 tx->reserved = tx->shaping = 0;
1327 tx->send = mem;
1328 tx->words = size >> 2;
1329 skb_queue_head_init(&tx->backlog);
1330 for (order = 0; size > (1 << (order+10)); order++);
1331 eni_out((order << MID_SIZE_SHIFT) |
1332 ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)),
1333 MID_TX_PLACE(tx->index));
1334 tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) &
1335 MID_DESCR_START;
1336 }
1337 error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited);
1338 if (!error && txtp->min_pcr > rate) error = -EINVAL;
1339 if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR &&
1340 txtp->max_pcr < rate) error = -EINVAL;
1341 if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved)
1342 error = -EINVAL;
1343 if (!error && set_rsv && !set_shp && rate < tx->shaping)
1344 error = -EINVAL;
1345 if (!error && !set_rsv && rate > tx->reserved && !ubr)
1346 error = -EINVAL;
1347 if (error) {
1348 if (new_tx) {
1349 tx->send = NULL;
1350 eni_free_mem(eni_dev,mem,size);
1351 }
1352 return error;
1353 }
1354 txtp->pcr = rate;
1355 if (set_rsv && !ubr) {
1356 eni_dev->tx_bw += tx->reserved;
1357 tx->reserved = rate;
1358 eni_dev->tx_bw -= rate;
1359 }
1360 if (set_shp || (unlimited && new_tx)) {
1361 if (unlimited && new_tx) eni_dev->ubr = tx;
1362 tx->prescaler = pre;
1363 tx->resolution = res;
1364 tx->shaping = rate;
1365 }
1366 if (set_shp) eni_vcc->tx = tx;
1367 DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping);
1368 return 0;
1369 }
1370
1371
open_tx_first(struct atm_vcc * vcc)1372 static int open_tx_first(struct atm_vcc *vcc)
1373 {
1374 ENI_VCC(vcc)->tx = NULL;
1375 if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0;
1376 ENI_VCC(vcc)->txing = 0;
1377 return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1);
1378 }
1379
1380
open_tx_second(struct atm_vcc * vcc)1381 static int open_tx_second(struct atm_vcc *vcc)
1382 {
1383 return 0; /* nothing to do */
1384 }
1385
1386
close_tx(struct atm_vcc * vcc)1387 static void close_tx(struct atm_vcc *vcc)
1388 {
1389 DECLARE_WAITQUEUE(wait,current);
1390 struct eni_dev *eni_dev;
1391 struct eni_vcc *eni_vcc;
1392
1393 eni_vcc = ENI_VCC(vcc);
1394 if (!eni_vcc->tx) return;
1395 eni_dev = ENI_DEV(vcc->dev);
1396 /* wait for TX queue to drain */
1397 DPRINTK("eni_close: waiting for TX ...\n");
1398 add_wait_queue(&eni_dev->tx_wait,&wait);
1399 set_current_state(TASK_UNINTERRUPTIBLE);
1400 for (;;) {
1401 int txing;
1402
1403 tasklet_disable(&eni_dev->task);
1404 txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing;
1405 tasklet_enable(&eni_dev->task);
1406 if (!txing) break;
1407 DPRINTK("%d TX left\n",eni_vcc->txing);
1408 schedule();
1409 set_current_state(TASK_UNINTERRUPTIBLE);
1410 }
1411 set_current_state(TASK_RUNNING);
1412 remove_wait_queue(&eni_dev->tx_wait,&wait);
1413 if (eni_vcc->tx != eni_dev->ubr) {
1414 /*
1415 * Looping a few times in here is probably far cheaper than
1416 * keeping track of TX completions all the time, so let's poll
1417 * a bit ...
1418 */
1419 while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) !=
1420 eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index)))
1421 schedule();
1422 eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2);
1423 eni_vcc->tx->send = NULL;
1424 eni_dev->tx_bw += eni_vcc->tx->reserved;
1425 }
1426 eni_vcc->tx = NULL;
1427 }
1428
1429
start_tx(struct atm_dev * dev)1430 static int start_tx(struct atm_dev *dev)
1431 {
1432 struct eni_dev *eni_dev;
1433 int i;
1434
1435 eni_dev = ENI_DEV(dev);
1436 eni_dev->lost = 0;
1437 eni_dev->tx_bw = ATM_OC3_PCR;
1438 eni_dev->tx_mult = DEFAULT_TX_MULT;
1439 init_waitqueue_head(&eni_dev->tx_wait);
1440 eni_dev->ubr = NULL;
1441 skb_queue_head_init(&eni_dev->tx_queue);
1442 eni_out(0,MID_DMA_WR_TX);
1443 for (i = 0; i < NR_CHAN; i++) {
1444 eni_dev->tx[i].send = NULL;
1445 eni_dev->tx[i].index = i;
1446 }
1447 return 0;
1448 }
1449
1450
1451 /*--------------------------------- common ----------------------------------*/
1452
1453
1454 #if 0 /* may become useful again when tuning things */
1455
1456 static void foo(void)
1457 {
1458 printk(KERN_INFO
1459 "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n"
1460 "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n",
1461 tx_complete,dma_complete,queued,requeued,submitted,backlogged,
1462 rx_enqueued,rx_dequeued,putting,pushed);
1463 if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost);
1464 }
1465
1466 #endif
1467
1468
bug_int(struct atm_dev * dev,unsigned long reason)1469 static void bug_int(struct atm_dev *dev,unsigned long reason)
1470 {
1471 DPRINTK(">bug_int\n");
1472 if (reason & MID_DMA_ERR_ACK)
1473 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1474 "error\n",dev->number);
1475 if (reason & MID_TX_IDENT_MISM)
1476 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident "
1477 "mismatch\n",dev->number);
1478 if (reason & MID_TX_DMA_OVFL)
1479 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1480 "overflow\n",dev->number);
1481 EVENT("---dump ends here---\n",0,0);
1482 printk(KERN_NOTICE "---recent events---\n");
1483 event_dump();
1484 }
1485
1486
eni_int(int irq,void * dev_id)1487 static irqreturn_t eni_int(int irq,void *dev_id)
1488 {
1489 struct atm_dev *dev;
1490 struct eni_dev *eni_dev;
1491 u32 reason;
1492
1493 DPRINTK(">eni_int\n");
1494 dev = dev_id;
1495 eni_dev = ENI_DEV(dev);
1496 reason = eni_in(MID_ISA);
1497 DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason);
1498 /*
1499 * Must handle these two right now, because reading ISA doesn't clear
1500 * them, so they re-occur and we never make it to the tasklet. Since
1501 * they're rare, we don't mind the occasional invocation of eni_tasklet
1502 * with eni_dev->events == 0.
1503 */
1504 if (reason & MID_STAT_OVFL) {
1505 EVENT("stat overflow\n",0,0);
1506 eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH;
1507 }
1508 if (reason & MID_SUNI_INT) {
1509 EVENT("SUNI int\n",0,0);
1510 dev->phy->interrupt(dev);
1511 #if 0
1512 foo();
1513 #endif
1514 }
1515 spin_lock(&eni_dev->lock);
1516 eni_dev->events |= reason;
1517 spin_unlock(&eni_dev->lock);
1518 tasklet_schedule(&eni_dev->task);
1519 return IRQ_HANDLED;
1520 }
1521
1522
eni_tasklet(unsigned long data)1523 static void eni_tasklet(unsigned long data)
1524 {
1525 struct atm_dev *dev = (struct atm_dev *) data;
1526 struct eni_dev *eni_dev = ENI_DEV(dev);
1527 unsigned long flags;
1528 u32 events;
1529
1530 DPRINTK("eni_tasklet (dev %p)\n",dev);
1531 spin_lock_irqsave(&eni_dev->lock,flags);
1532 events = xchg(&eni_dev->events,0);
1533 spin_unlock_irqrestore(&eni_dev->lock,flags);
1534 if (events & MID_RX_DMA_COMPLETE) {
1535 EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0);
1536 dequeue_rx(dev);
1537 EVENT("dequeue_rx done, starting poll_rx\n",0,0);
1538 poll_rx(dev);
1539 EVENT("poll_rx done\n",0,0);
1540 /* poll_tx ? */
1541 }
1542 if (events & MID_SERVICE) {
1543 EVENT("INT: service, starting get_service\n",0,0);
1544 get_service(dev);
1545 EVENT("get_service done, starting poll_rx\n",0,0);
1546 poll_rx(dev);
1547 EVENT("poll_rx done\n",0,0);
1548 }
1549 if (events & MID_TX_DMA_COMPLETE) {
1550 EVENT("INT: TX DMA COMPLETE\n",0,0);
1551 dequeue_tx(dev);
1552 }
1553 if (events & MID_TX_COMPLETE) {
1554 EVENT("INT: TX COMPLETE\n",0,0);
1555 tx_complete++;
1556 wake_up(&eni_dev->tx_wait);
1557 /* poll_rx ? */
1558 }
1559 if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) {
1560 EVENT("bug interrupt\n",0,0);
1561 bug_int(dev,events);
1562 }
1563 poll_tx(dev);
1564 }
1565
1566
1567 /*--------------------------------- entries ---------------------------------*/
1568
1569
1570 static const char *media_name[] __devinitdata = {
1571 "MMF", "SMF", "MMF", "03?", /* 0- 3 */
1572 "UTP", "05?", "06?", "07?", /* 4- 7 */
1573 "TAXI","09?", "10?", "11?", /* 8-11 */
1574 "12?", "13?", "14?", "15?", /* 12-15 */
1575 "MMF", "SMF", "18?", "19?", /* 16-19 */
1576 "UTP", "21?", "22?", "23?", /* 20-23 */
1577 "24?", "25?", "26?", "27?", /* 24-27 */
1578 "28?", "29?", "30?", "31?" /* 28-31 */
1579 };
1580
1581
1582 #define SET_SEPROM \
1583 ({ if (!error && !pci_error) { \
1584 pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \
1585 udelay(10); /* 10 usecs */ \
1586 } })
1587 #define GET_SEPROM \
1588 ({ if (!error && !pci_error) { \
1589 pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \
1590 udelay(10); /* 10 usecs */ \
1591 } })
1592
1593
get_esi_asic(struct atm_dev * dev)1594 static int __devinit get_esi_asic(struct atm_dev *dev)
1595 {
1596 struct eni_dev *eni_dev;
1597 unsigned char tonga;
1598 int error,failed,pci_error;
1599 int address,i,j;
1600
1601 eni_dev = ENI_DEV(dev);
1602 error = pci_error = 0;
1603 tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK;
1604 SET_SEPROM;
1605 for (i = 0; i < ESI_LEN && !error && !pci_error; i++) {
1606 /* start operation */
1607 tonga |= SEPROM_DATA;
1608 SET_SEPROM;
1609 tonga |= SEPROM_CLK;
1610 SET_SEPROM;
1611 tonga &= ~SEPROM_DATA;
1612 SET_SEPROM;
1613 tonga &= ~SEPROM_CLK;
1614 SET_SEPROM;
1615 /* send address */
1616 address = ((i+SEPROM_ESI_BASE) << 1)+1;
1617 for (j = 7; j >= 0; j--) {
1618 tonga = (address >> j) & 1 ? tonga | SEPROM_DATA :
1619 tonga & ~SEPROM_DATA;
1620 SET_SEPROM;
1621 tonga |= SEPROM_CLK;
1622 SET_SEPROM;
1623 tonga &= ~SEPROM_CLK;
1624 SET_SEPROM;
1625 }
1626 /* get ack */
1627 tonga |= SEPROM_DATA;
1628 SET_SEPROM;
1629 tonga |= SEPROM_CLK;
1630 SET_SEPROM;
1631 GET_SEPROM;
1632 failed = tonga & SEPROM_DATA;
1633 tonga &= ~SEPROM_CLK;
1634 SET_SEPROM;
1635 tonga |= SEPROM_DATA;
1636 SET_SEPROM;
1637 if (failed) error = -EIO;
1638 else {
1639 dev->esi[i] = 0;
1640 for (j = 7; j >= 0; j--) {
1641 dev->esi[i] <<= 1;
1642 tonga |= SEPROM_DATA;
1643 SET_SEPROM;
1644 tonga |= SEPROM_CLK;
1645 SET_SEPROM;
1646 GET_SEPROM;
1647 if (tonga & SEPROM_DATA) dev->esi[i] |= 1;
1648 tonga &= ~SEPROM_CLK;
1649 SET_SEPROM;
1650 tonga |= SEPROM_DATA;
1651 SET_SEPROM;
1652 }
1653 /* get ack */
1654 tonga |= SEPROM_DATA;
1655 SET_SEPROM;
1656 tonga |= SEPROM_CLK;
1657 SET_SEPROM;
1658 GET_SEPROM;
1659 if (!(tonga & SEPROM_DATA)) error = -EIO;
1660 tonga &= ~SEPROM_CLK;
1661 SET_SEPROM;
1662 tonga |= SEPROM_DATA;
1663 SET_SEPROM;
1664 }
1665 /* stop operation */
1666 tonga &= ~SEPROM_DATA;
1667 SET_SEPROM;
1668 tonga |= SEPROM_CLK;
1669 SET_SEPROM;
1670 tonga |= SEPROM_DATA;
1671 SET_SEPROM;
1672 }
1673 if (pci_error) {
1674 printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI "
1675 "(0x%02x)\n",dev->number,pci_error);
1676 error = -EIO;
1677 }
1678 return error;
1679 }
1680
1681
1682 #undef SET_SEPROM
1683 #undef GET_SEPROM
1684
1685
get_esi_fpga(struct atm_dev * dev,void __iomem * base)1686 static int __devinit get_esi_fpga(struct atm_dev *dev, void __iomem *base)
1687 {
1688 void __iomem *mac_base;
1689 int i;
1690
1691 mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom);
1692 for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3));
1693 return 0;
1694 }
1695
1696
eni_do_init(struct atm_dev * dev)1697 static int __devinit eni_do_init(struct atm_dev *dev)
1698 {
1699 struct midway_eprom __iomem *eprom;
1700 struct eni_dev *eni_dev;
1701 struct pci_dev *pci_dev;
1702 unsigned long real_base;
1703 void __iomem *base;
1704 int error,i,last;
1705
1706 DPRINTK(">eni_init\n");
1707 dev->ci_range.vpi_bits = 0;
1708 dev->ci_range.vci_bits = NR_VCI_LD;
1709 dev->link_rate = ATM_OC3_PCR;
1710 eni_dev = ENI_DEV(dev);
1711 pci_dev = eni_dev->pci_dev;
1712 real_base = pci_resource_start(pci_dev, 0);
1713 eni_dev->irq = pci_dev->irq;
1714 if ((error = pci_write_config_word(pci_dev,PCI_COMMAND,
1715 PCI_COMMAND_MEMORY |
1716 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1717 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory "
1718 "(0x%02x)\n",dev->number,error);
1719 return -EIO;
1720 }
1721 printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,",
1722 dev->number,pci_dev->revision,real_base,eni_dev->irq);
1723 if (!(base = ioremap_nocache(real_base,MAP_MAX_SIZE))) {
1724 printk("\n");
1725 printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page "
1726 "mapping\n",dev->number);
1727 return error;
1728 }
1729 eni_dev->ioaddr = base;
1730 eni_dev->base_diff = real_base - (unsigned long) base;
1731 /* id may not be present in ASIC Tonga boards - check this @@@ */
1732 if (!eni_dev->asic) {
1733 eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom));
1734 if (readl(&eprom->magic) != ENI155_MAGIC) {
1735 printk("\n");
1736 printk(KERN_ERR DEV_LABEL
1737 "(itf %d): bad magic - expected 0x%x, got 0x%x\n",
1738 dev->number, ENI155_MAGIC,
1739 (unsigned)readl(&eprom->magic));
1740 error = -EINVAL;
1741 goto unmap;
1742 }
1743 }
1744 eni_dev->phy = base+PHY_BASE;
1745 eni_dev->reg = base+REG_BASE;
1746 eni_dev->ram = base+RAM_BASE;
1747 last = MAP_MAX_SIZE-RAM_BASE;
1748 for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) {
1749 writel(0x55555555,eni_dev->ram+i);
1750 if (readl(eni_dev->ram+i) != 0x55555555) last = i;
1751 else {
1752 writel(0xAAAAAAAA,eni_dev->ram+i);
1753 if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i;
1754 else writel(i,eni_dev->ram+i);
1755 }
1756 }
1757 for (i = 0; i < last; i += RAM_INCREMENT)
1758 if (readl(eni_dev->ram+i) != i) break;
1759 eni_dev->mem = i;
1760 memset_io(eni_dev->ram,0,eni_dev->mem);
1761 /* TODO: should shrink allocation now */
1762 printk("mem=%dkB (",eni_dev->mem >> 10);
1763 /* TODO: check for non-SUNI, check for TAXI ? */
1764 if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) {
1765 printk(")\n");
1766 printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n",
1767 dev->number,(unsigned) eni_in(MID_RES_ID_MCON));
1768 error = -EINVAL;
1769 goto unmap;
1770 }
1771 error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base);
1772 if (error)
1773 goto unmap;
1774 for (i = 0; i < ESI_LEN; i++)
1775 printk("%s%02X",i ? "-" : "",dev->esi[i]);
1776 printk(")\n");
1777 printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number,
1778 eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA",
1779 media_name[eni_in(MID_RES_ID_MCON) & DAUGTHER_ID]);
1780
1781 error = suni_init(dev);
1782 if (error)
1783 goto unmap;
1784 out:
1785 return error;
1786 unmap:
1787 iounmap(base);
1788 goto out;
1789 }
1790
eni_do_release(struct atm_dev * dev)1791 static void eni_do_release(struct atm_dev *dev)
1792 {
1793 struct eni_dev *ed = ENI_DEV(dev);
1794
1795 dev->phy->stop(dev);
1796 dev->phy = NULL;
1797 iounmap(ed->ioaddr);
1798 }
1799
eni_start(struct atm_dev * dev)1800 static int __devinit eni_start(struct atm_dev *dev)
1801 {
1802 struct eni_dev *eni_dev;
1803
1804 void __iomem *buf;
1805 unsigned long buffer_mem;
1806 int error;
1807
1808 DPRINTK(">eni_start\n");
1809 eni_dev = ENI_DEV(dev);
1810 if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) {
1811 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
1812 dev->number,eni_dev->irq);
1813 error = -EAGAIN;
1814 goto out;
1815 }
1816 pci_set_master(eni_dev->pci_dev);
1817 if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND,
1818 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
1819 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1820 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+"
1821 "master (0x%02x)\n",dev->number,error);
1822 goto free_irq;
1823 }
1824 if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,
1825 END_SWAP_DMA))) {
1826 printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap "
1827 "(0x%02x)\n",dev->number,error);
1828 goto free_irq;
1829 }
1830 /* determine addresses of internal tables */
1831 eni_dev->vci = eni_dev->ram;
1832 eni_dev->rx_dma = eni_dev->ram+NR_VCI*16;
1833 eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8;
1834 eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8;
1835 buf = eni_dev->service+NR_SERVICE*4;
1836 DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n",
1837 eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma,
1838 eni_dev->service,buf);
1839 spin_lock_init(&eni_dev->lock);
1840 tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev);
1841 eni_dev->events = 0;
1842 /* initialize memory management */
1843 buffer_mem = eni_dev->mem - (buf - eni_dev->ram);
1844 eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2;
1845 eni_dev->free_list = kmalloc(
1846 sizeof(struct eni_free)*(eni_dev->free_list_size+1),GFP_KERNEL);
1847 if (!eni_dev->free_list) {
1848 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
1849 dev->number);
1850 error = -ENOMEM;
1851 goto free_irq;
1852 }
1853 eni_dev->free_len = 0;
1854 eni_put_free(eni_dev,buf,buffer_mem);
1855 memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */
1856 /*
1857 * byte_addr free (k)
1858 * 0x00000000 512 VCI table
1859 * 0x00004000 496 RX DMA
1860 * 0x00005000 492 TX DMA
1861 * 0x00006000 488 service list
1862 * 0x00007000 484 buffers
1863 * 0x00080000 0 end (512kB)
1864 */
1865 eni_out(0xffffffff,MID_IE);
1866 error = start_tx(dev);
1867 if (error) goto free_list;
1868 error = start_rx(dev);
1869 if (error) goto free_list;
1870 error = dev->phy->start(dev);
1871 if (error) goto free_list;
1872 eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) |
1873 MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE,
1874 MID_MC_S);
1875 /* Tonga uses SBus INTReq1 */
1876 (void) eni_in(MID_ISA); /* clear Midway interrupts */
1877 return 0;
1878
1879 free_list:
1880 kfree(eni_dev->free_list);
1881
1882 free_irq:
1883 free_irq(eni_dev->irq, dev);
1884
1885 out:
1886 return error;
1887 }
1888
1889
eni_close(struct atm_vcc * vcc)1890 static void eni_close(struct atm_vcc *vcc)
1891 {
1892 DPRINTK(">eni_close\n");
1893 if (!ENI_VCC(vcc)) return;
1894 clear_bit(ATM_VF_READY,&vcc->flags);
1895 close_rx(vcc);
1896 close_tx(vcc);
1897 DPRINTK("eni_close: done waiting\n");
1898 /* deallocate memory */
1899 kfree(ENI_VCC(vcc));
1900 vcc->dev_data = NULL;
1901 clear_bit(ATM_VF_ADDR,&vcc->flags);
1902 /*foo();*/
1903 }
1904
1905
eni_open(struct atm_vcc * vcc)1906 static int eni_open(struct atm_vcc *vcc)
1907 {
1908 struct eni_vcc *eni_vcc;
1909 int error;
1910 short vpi = vcc->vpi;
1911 int vci = vcc->vci;
1912
1913 DPRINTK(">eni_open\n");
1914 EVENT("eni_open\n",0,0);
1915 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1916 vcc->dev_data = NULL;
1917 if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
1918 set_bit(ATM_VF_ADDR,&vcc->flags);
1919 if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5)
1920 return -EINVAL;
1921 DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi,
1922 vcc->vci);
1923 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
1924 eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL);
1925 if (!eni_vcc) return -ENOMEM;
1926 vcc->dev_data = eni_vcc;
1927 eni_vcc->tx = NULL; /* for eni_close after open_rx */
1928 if ((error = open_rx_first(vcc))) {
1929 eni_close(vcc);
1930 return error;
1931 }
1932 if ((error = open_tx_first(vcc))) {
1933 eni_close(vcc);
1934 return error;
1935 }
1936 }
1937 if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0;
1938 if ((error = open_rx_second(vcc))) {
1939 eni_close(vcc);
1940 return error;
1941 }
1942 if ((error = open_tx_second(vcc))) {
1943 eni_close(vcc);
1944 return error;
1945 }
1946 set_bit(ATM_VF_READY,&vcc->flags);
1947 /* should power down SUNI while !ref_count @@@ */
1948 return 0;
1949 }
1950
1951
eni_change_qos(struct atm_vcc * vcc,struct atm_qos * qos,int flgs)1952 static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs)
1953 {
1954 struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1955 struct eni_tx *tx = ENI_VCC(vcc)->tx;
1956 struct sk_buff *skb;
1957 int error,rate,rsv,shp;
1958
1959 if (qos->txtp.traffic_class == ATM_NONE) return 0;
1960 if (tx == eni_dev->ubr) return -EBADFD;
1961 rate = atm_pcr_goal(&qos->txtp);
1962 if (rate < 0) rate = -rate;
1963 rsv = shp = 0;
1964 if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1;
1965 if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1;
1966 if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1;
1967 if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1;
1968 if (!rsv && !shp) return 0;
1969 error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp);
1970 if (error) return error;
1971 if (shp && !(flgs & ATM_MF_IMMED)) return 0;
1972 /*
1973 * Walk through the send buffer and patch the rate information in all
1974 * segmentation buffer descriptors of this VCC.
1975 */
1976 tasklet_disable(&eni_dev->task);
1977 skb_queue_walk(&eni_dev->tx_queue, skb) {
1978 void __iomem *dsc;
1979
1980 if (ATM_SKB(skb)->vcc != vcc) continue;
1981 dsc = tx->send+ENI_PRV_POS(skb)*4;
1982 writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) |
1983 (tx->prescaler << MID_SEG_PR_SHIFT) |
1984 (tx->resolution << MID_SEG_RATE_SHIFT), dsc);
1985 }
1986 tasklet_enable(&eni_dev->task);
1987 return 0;
1988 }
1989
1990
eni_ioctl(struct atm_dev * dev,unsigned int cmd,void __user * arg)1991 static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
1992 {
1993 struct eni_dev *eni_dev = ENI_DEV(dev);
1994
1995 if (cmd == ENI_MEMDUMP) {
1996 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1997 printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d "
1998 "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number);
1999 dump(dev);
2000 return 0;
2001 }
2002 if (cmd == ENI_SETMULT) {
2003 struct eni_multipliers mult;
2004
2005 if (!capable(CAP_NET_ADMIN)) return -EPERM;
2006 if (copy_from_user(&mult, arg,
2007 sizeof(struct eni_multipliers)))
2008 return -EFAULT;
2009 if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) ||
2010 mult.tx > 65536 || mult.rx > 65536)
2011 return -EINVAL;
2012 if (mult.tx) eni_dev->tx_mult = mult.tx;
2013 if (mult.rx) eni_dev->rx_mult = mult.rx;
2014 return 0;
2015 }
2016 if (cmd == ATM_SETCIRANGE) {
2017 struct atm_cirange ci;
2018
2019 if (copy_from_user(&ci, arg,sizeof(struct atm_cirange)))
2020 return -EFAULT;
2021 if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) &&
2022 (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX))
2023 return 0;
2024 return -EINVAL;
2025 }
2026 if (!dev->phy->ioctl) return -ENOIOCTLCMD;
2027 return dev->phy->ioctl(dev,cmd,arg);
2028 }
2029
2030
eni_getsockopt(struct atm_vcc * vcc,int level,int optname,void __user * optval,int optlen)2031 static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname,
2032 void __user *optval,int optlen)
2033 {
2034 return -EINVAL;
2035 }
2036
2037
eni_setsockopt(struct atm_vcc * vcc,int level,int optname,void __user * optval,unsigned int optlen)2038 static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname,
2039 void __user *optval,unsigned int optlen)
2040 {
2041 return -EINVAL;
2042 }
2043
2044
eni_send(struct atm_vcc * vcc,struct sk_buff * skb)2045 static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb)
2046 {
2047 enum enq_res res;
2048
2049 DPRINTK(">eni_send\n");
2050 if (!ENI_VCC(vcc)->tx) {
2051 if (vcc->pop) vcc->pop(vcc,skb);
2052 else dev_kfree_skb(skb);
2053 return -EINVAL;
2054 }
2055 if (!skb) {
2056 printk(KERN_CRIT "!skb in eni_send ?\n");
2057 if (vcc->pop) vcc->pop(vcc,skb);
2058 return -EINVAL;
2059 }
2060 if (vcc->qos.aal == ATM_AAL0) {
2061 if (skb->len != ATM_CELL_SIZE-1) {
2062 if (vcc->pop) vcc->pop(vcc,skb);
2063 else dev_kfree_skb(skb);
2064 return -EINVAL;
2065 }
2066 *(u32 *) skb->data = htonl(*(u32 *) skb->data);
2067 }
2068 submitted++;
2069 ATM_SKB(skb)->vcc = vcc;
2070 tasklet_disable(&ENI_DEV(vcc->dev)->task);
2071 res = do_tx(skb);
2072 tasklet_enable(&ENI_DEV(vcc->dev)->task);
2073 if (res == enq_ok) return 0;
2074 skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb);
2075 backlogged++;
2076 tasklet_schedule(&ENI_DEV(vcc->dev)->task);
2077 return 0;
2078 }
2079
eni_phy_put(struct atm_dev * dev,unsigned char value,unsigned long addr)2080 static void eni_phy_put(struct atm_dev *dev,unsigned char value,
2081 unsigned long addr)
2082 {
2083 writel(value,ENI_DEV(dev)->phy+addr*4);
2084 }
2085
2086
2087
eni_phy_get(struct atm_dev * dev,unsigned long addr)2088 static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr)
2089 {
2090 return readl(ENI_DEV(dev)->phy+addr*4);
2091 }
2092
2093
eni_proc_read(struct atm_dev * dev,loff_t * pos,char * page)2094 static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page)
2095 {
2096 struct hlist_node *node;
2097 struct sock *s;
2098 static const char *signal[] = { "LOST","unknown","okay" };
2099 struct eni_dev *eni_dev = ENI_DEV(dev);
2100 struct atm_vcc *vcc;
2101 int left,i;
2102
2103 left = *pos;
2104 if (!left)
2105 return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, "
2106 "%d cps remaining\n",dev->number,signal[(int) dev->signal],
2107 eni_dev->mem >> 10,eni_dev->tx_bw);
2108 if (!--left)
2109 return sprintf(page,"%4sBursts: TX"
2110 #if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \
2111 !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \
2112 !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \
2113 !defined(CONFIG_ATM_ENI_BURST_TX_2W)
2114 " none"
2115 #endif
2116 #ifdef CONFIG_ATM_ENI_BURST_TX_16W
2117 " 16W"
2118 #endif
2119 #ifdef CONFIG_ATM_ENI_BURST_TX_8W
2120 " 8W"
2121 #endif
2122 #ifdef CONFIG_ATM_ENI_BURST_TX_4W
2123 " 4W"
2124 #endif
2125 #ifdef CONFIG_ATM_ENI_BURST_TX_2W
2126 " 2W"
2127 #endif
2128 ", RX"
2129 #if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \
2130 !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \
2131 !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \
2132 !defined(CONFIG_ATM_ENI_BURST_RX_2W)
2133 " none"
2134 #endif
2135 #ifdef CONFIG_ATM_ENI_BURST_RX_16W
2136 " 16W"
2137 #endif
2138 #ifdef CONFIG_ATM_ENI_BURST_RX_8W
2139 " 8W"
2140 #endif
2141 #ifdef CONFIG_ATM_ENI_BURST_RX_4W
2142 " 4W"
2143 #endif
2144 #ifdef CONFIG_ATM_ENI_BURST_RX_2W
2145 " 2W"
2146 #endif
2147 #ifndef CONFIG_ATM_ENI_TUNE_BURST
2148 " (default)"
2149 #endif
2150 "\n","");
2151 if (!--left)
2152 return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n",
2153 "",eni_dev->tx_mult,eni_dev->rx_mult);
2154 for (i = 0; i < NR_CHAN; i++) {
2155 struct eni_tx *tx = eni_dev->tx+i;
2156
2157 if (!tx->send) continue;
2158 if (!--left) {
2159 return sprintf(page,"tx[%d]: 0x%ld-0x%ld "
2160 "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i,
2161 (unsigned long) (tx->send - eni_dev->ram),
2162 tx->send-eni_dev->ram+tx->words*4-1,tx->words*4,
2163 tx->reserved,tx->shaping,
2164 tx == eni_dev->ubr ? " (UBR)" : "");
2165 }
2166 if (--left) continue;
2167 return sprintf(page,"%10sbacklog %u packets\n","",
2168 skb_queue_len(&tx->backlog));
2169 }
2170 read_lock(&vcc_sklist_lock);
2171 for(i = 0; i < VCC_HTABLE_SIZE; ++i) {
2172 struct hlist_head *head = &vcc_hash[i];
2173
2174 sk_for_each(s, node, head) {
2175 struct eni_vcc *eni_vcc;
2176 int length;
2177
2178 vcc = atm_sk(s);
2179 if (vcc->dev != dev)
2180 continue;
2181 eni_vcc = ENI_VCC(vcc);
2182 if (--left) continue;
2183 length = sprintf(page,"vcc %4d: ",vcc->vci);
2184 if (eni_vcc->rx) {
2185 length += sprintf(page+length,"0x%ld-0x%ld "
2186 "(%6ld bytes)",
2187 (unsigned long) (eni_vcc->recv - eni_dev->ram),
2188 eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1,
2189 eni_vcc->words*4);
2190 if (eni_vcc->tx) length += sprintf(page+length,", ");
2191 }
2192 if (eni_vcc->tx)
2193 length += sprintf(page+length,"tx[%d], txing %d bytes",
2194 eni_vcc->tx->index,eni_vcc->txing);
2195 page[length] = '\n';
2196 read_unlock(&vcc_sklist_lock);
2197 return length+1;
2198 }
2199 }
2200 read_unlock(&vcc_sklist_lock);
2201 for (i = 0; i < eni_dev->free_len; i++) {
2202 struct eni_free *fe = eni_dev->free_list+i;
2203 unsigned long offset;
2204
2205 if (--left) continue;
2206 offset = (unsigned long) eni_dev->ram+eni_dev->base_diff;
2207 return sprintf(page,"free %p-%p (%6d bytes)\n",
2208 fe->start-offset,fe->start-offset+(1 << fe->order)-1,
2209 1 << fe->order);
2210 }
2211 return 0;
2212 }
2213
2214
2215 static const struct atmdev_ops ops = {
2216 .open = eni_open,
2217 .close = eni_close,
2218 .ioctl = eni_ioctl,
2219 .getsockopt = eni_getsockopt,
2220 .setsockopt = eni_setsockopt,
2221 .send = eni_send,
2222 .phy_put = eni_phy_put,
2223 .phy_get = eni_phy_get,
2224 .change_qos = eni_change_qos,
2225 .proc_read = eni_proc_read
2226 };
2227
2228
eni_init_one(struct pci_dev * pci_dev,const struct pci_device_id * ent)2229 static int __devinit eni_init_one(struct pci_dev *pci_dev,
2230 const struct pci_device_id *ent)
2231 {
2232 struct atm_dev *dev;
2233 struct eni_dev *eni_dev;
2234 struct eni_zero *zero;
2235 int rc;
2236
2237 rc = pci_enable_device(pci_dev);
2238 if (rc < 0)
2239 goto out;
2240
2241 rc = -ENOMEM;
2242 eni_dev = kmalloc(sizeof(struct eni_dev), GFP_KERNEL);
2243 if (!eni_dev)
2244 goto err_disable;
2245
2246 zero = &eni_dev->zero;
2247 zero->addr = pci_alloc_consistent(pci_dev, ENI_ZEROES_SIZE, &zero->dma);
2248 if (!zero->addr)
2249 goto err_kfree;
2250
2251 dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL);
2252 if (!dev)
2253 goto err_free_consistent;
2254
2255 dev->dev_data = eni_dev;
2256 pci_set_drvdata(pci_dev, dev);
2257 eni_dev->pci_dev = pci_dev;
2258 eni_dev->asic = ent->driver_data;
2259
2260 rc = eni_do_init(dev);
2261 if (rc < 0)
2262 goto err_unregister;
2263
2264 rc = eni_start(dev);
2265 if (rc < 0)
2266 goto err_eni_release;
2267
2268 eni_dev->more = eni_boards;
2269 eni_boards = dev;
2270 out:
2271 return rc;
2272
2273 err_eni_release:
2274 eni_do_release(dev);
2275 err_unregister:
2276 atm_dev_deregister(dev);
2277 err_free_consistent:
2278 pci_free_consistent(pci_dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2279 err_kfree:
2280 kfree(eni_dev);
2281 err_disable:
2282 pci_disable_device(pci_dev);
2283 goto out;
2284 }
2285
2286
2287 static struct pci_device_id eni_pci_tbl[] = {
2288 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_FPGA), 0 /* FPGA */ },
2289 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_ASIC), 1 /* ASIC */ },
2290 { 0, }
2291 };
2292 MODULE_DEVICE_TABLE(pci,eni_pci_tbl);
2293
2294
eni_remove_one(struct pci_dev * pdev)2295 static void __devexit eni_remove_one(struct pci_dev *pdev)
2296 {
2297 struct atm_dev *dev = pci_get_drvdata(pdev);
2298 struct eni_dev *ed = ENI_DEV(dev);
2299 struct eni_zero *zero = &ed->zero;
2300
2301 eni_do_release(dev);
2302 atm_dev_deregister(dev);
2303 pci_free_consistent(pdev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2304 kfree(ed);
2305 pci_disable_device(pdev);
2306 }
2307
2308
2309 static struct pci_driver eni_driver = {
2310 .name = DEV_LABEL,
2311 .id_table = eni_pci_tbl,
2312 .probe = eni_init_one,
2313 .remove = __devexit_p(eni_remove_one),
2314 };
2315
2316
eni_init(void)2317 static int __init eni_init(void)
2318 {
2319 struct sk_buff *skb; /* dummy for sizeof */
2320
2321 if (sizeof(skb->cb) < sizeof(struct eni_skb_prv)) {
2322 printk(KERN_ERR "eni_detect: skb->cb is too small (%Zd < %Zd)\n",
2323 sizeof(skb->cb),sizeof(struct eni_skb_prv));
2324 return -EIO;
2325 }
2326 return pci_register_driver(&eni_driver);
2327 }
2328
2329
2330 module_init(eni_init);
2331 /* @@@ since exit routine not defined, this module can not be unloaded */
2332
2333 MODULE_LICENSE("GPL");
2334