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