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1/* drivers/atm/zatm.c - ZeitNet ZN122x 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/netdevice.h>
16#include <linux/delay.h>
17#include <linux/uio.h>
18#include <linux/init.h>
19#include <linux/interrupt.h>
20#include <linux/dma-mapping.h>
21#include <linux/atm_zatm.h>
22#include <linux/capability.h>
23#include <linux/bitops.h>
24#include <linux/wait.h>
25#include <linux/slab.h>
26#include <asm/byteorder.h>
27#include <asm/system.h>
28#include <asm/string.h>
29#include <asm/io.h>
30#include <linux/atomic.h>
31#include <asm/uaccess.h>
32
33#include "uPD98401.h"
34#include "uPD98402.h"
35#include "zeprom.h"
36#include "zatm.h"
37
38
39/*
40 * TODO:
41 *
42 * Minor features
43 * - support 64 kB SDUs (will have to use multibuffer batches then :-( )
44 * - proper use of CDV, credit = max(1,CDVT*PCR)
45 * - AAL0
46 * - better receive timestamps
47 * - OAM
48 */
49
50#define ZATM_COPPER 1
51
52#if 0
53#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
54#else
55#define DPRINTK(format,args...)
56#endif
57
58#ifndef CONFIG_ATM_ZATM_DEBUG
59
60
61#define NULLCHECK(x)
62
63#define EVENT(s,a,b)
64
65
66static void event_dump(void)
67{
68}
69
70
71#else
72
73
74/*
75 * NULL pointer checking
76 */
77
78#define NULLCHECK(x) \
79 if ((unsigned long) (x) < 0x30) printk(KERN_CRIT #x "==0x%x\n", (int) (x))
80
81/*
82 * Very extensive activity logging. Greatly improves bug detection speed but
83 * costs a few Mbps if enabled.
84 */
85
86#define EV 64
87
88static const char *ev[EV];
89static unsigned long ev_a[EV],ev_b[EV];
90static int ec = 0;
91
92
93static void EVENT(const char *s,unsigned long a,unsigned long b)
94{
95 ev[ec] = s;
96 ev_a[ec] = a;
97 ev_b[ec] = b;
98 ec = (ec+1) % EV;
99}
100
101
102static void event_dump(void)
103{
104 int n,i;
105
106 printk(KERN_NOTICE "----- event dump follows -----\n");
107 for (n = 0; n < EV; n++) {
108 i = (ec+n) % EV;
109 printk(KERN_NOTICE);
110 printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]);
111 }
112 printk(KERN_NOTICE "----- event dump ends here -----\n");
113}
114
115
116#endif /* CONFIG_ATM_ZATM_DEBUG */
117
118
119#define RING_BUSY 1 /* indication from do_tx that PDU has to be
120 backlogged */
121
122static struct atm_dev *zatm_boards = NULL;
123static unsigned long dummy[2] = {0,0};
124
125
126#define zin_n(r) inl(zatm_dev->base+r*4)
127#define zin(r) inl(zatm_dev->base+uPD98401_##r*4)
128#define zout(v,r) outl(v,zatm_dev->base+uPD98401_##r*4)
129#define zwait while (zin(CMR) & uPD98401_BUSY)
130
131/* RX0, RX1, TX0, TX1 */
132static const int mbx_entries[NR_MBX] = { 1024,1024,1024,1024 };
133static const int mbx_esize[NR_MBX] = { 16,16,4,4 }; /* entry size in bytes */
134
135#define MBX_SIZE(i) (mbx_entries[i]*mbx_esize[i])
136
137
138/*-------------------------------- utilities --------------------------------*/
139
140
141static void zpokel(struct zatm_dev *zatm_dev,u32 value,u32 addr)
142{
143 zwait;
144 zout(value,CER);
145 zout(uPD98401_IND_ACC | uPD98401_IA_BALL |
146 (uPD98401_IA_TGT_CM << uPD98401_IA_TGT_SHIFT) | addr,CMR);
147}
148
149
150static u32 zpeekl(struct zatm_dev *zatm_dev,u32 addr)
151{
152 zwait;
153 zout(uPD98401_IND_ACC | uPD98401_IA_BALL | uPD98401_IA_RW |
154 (uPD98401_IA_TGT_CM << uPD98401_IA_TGT_SHIFT) | addr,CMR);
155 zwait;
156 return zin(CER);
157}
158
159
160/*------------------------------- free lists --------------------------------*/
161
162
163/*
164 * Free buffer head structure:
165 * [0] pointer to buffer (for SAR)
166 * [1] buffer descr link pointer (for SAR)
167 * [2] back pointer to skb (for poll_rx)
168 * [3] data
169 * ...
170 */
171
172struct rx_buffer_head {
173 u32 buffer; /* pointer to buffer (for SAR) */
174 u32 link; /* buffer descriptor link pointer (for SAR) */
175 struct sk_buff *skb; /* back pointer to skb (for poll_rx) */
176};
177
178
179static void refill_pool(struct atm_dev *dev,int pool)
180{
181 struct zatm_dev *zatm_dev;
182 struct sk_buff *skb;
183 struct rx_buffer_head *first;
184 unsigned long flags;
185 int align,offset,free,count,size;
186
187 EVENT("refill_pool\n",0,0);
188 zatm_dev = ZATM_DEV(dev);
189 size = (64 << (pool <= ZATM_AAL5_POOL_BASE ? 0 :
190 pool-ZATM_AAL5_POOL_BASE))+sizeof(struct rx_buffer_head);
191 if (size < PAGE_SIZE) {
192 align = 32; /* for 32 byte alignment */
193 offset = sizeof(struct rx_buffer_head);
194 }
195 else {
196 align = 4096;
197 offset = zatm_dev->pool_info[pool].offset+
198 sizeof(struct rx_buffer_head);
199 }
200 size += align;
201 spin_lock_irqsave(&zatm_dev->lock, flags);
202 free = zpeekl(zatm_dev,zatm_dev->pool_base+2*pool) &
203 uPD98401_RXFP_REMAIN;
204 spin_unlock_irqrestore(&zatm_dev->lock, flags);
205 if (free >= zatm_dev->pool_info[pool].low_water) return;
206 EVENT("starting ... POOL: 0x%x, 0x%x\n",
207 zpeekl(zatm_dev,zatm_dev->pool_base+2*pool),
208 zpeekl(zatm_dev,zatm_dev->pool_base+2*pool+1));
209 EVENT("dummy: 0x%08lx, 0x%08lx\n",dummy[0],dummy[1]);
210 count = 0;
211 first = NULL;
212 while (free < zatm_dev->pool_info[pool].high_water) {
213 struct rx_buffer_head *head;
214
215 skb = alloc_skb(size,GFP_ATOMIC);
216 if (!skb) {
217 printk(KERN_WARNING DEV_LABEL "(Itf %d): got no new "
218 "skb (%d) with %d free\n",dev->number,size,free);
219 break;
220 }
221 skb_reserve(skb,(unsigned char *) ((((unsigned long) skb->data+
222 align+offset-1) & ~(unsigned long) (align-1))-offset)-
223 skb->data);
224 head = (struct rx_buffer_head *) skb->data;
225 skb_reserve(skb,sizeof(struct rx_buffer_head));
226 if (!first) first = head;
227 count++;
228 head->buffer = virt_to_bus(skb->data);
229 head->link = 0;
230 head->skb = skb;
231 EVENT("enq skb 0x%08lx/0x%08lx\n",(unsigned long) skb,
232 (unsigned long) head);
233 spin_lock_irqsave(&zatm_dev->lock, flags);
234 if (zatm_dev->last_free[pool])
235 ((struct rx_buffer_head *) (zatm_dev->last_free[pool]->
236 data))[-1].link = virt_to_bus(head);
237 zatm_dev->last_free[pool] = skb;
238 skb_queue_tail(&zatm_dev->pool[pool],skb);
239 spin_unlock_irqrestore(&zatm_dev->lock, flags);
240 free++;
241 }
242 if (first) {
243 spin_lock_irqsave(&zatm_dev->lock, flags);
244 zwait;
245 zout(virt_to_bus(first),CER);
246 zout(uPD98401_ADD_BAT | (pool << uPD98401_POOL_SHIFT) | count,
247 CMR);
248 spin_unlock_irqrestore(&zatm_dev->lock, flags);
249 EVENT ("POOL: 0x%x, 0x%x\n",
250 zpeekl(zatm_dev,zatm_dev->pool_base+2*pool),
251 zpeekl(zatm_dev,zatm_dev->pool_base+2*pool+1));
252 EVENT("dummy: 0x%08lx, 0x%08lx\n",dummy[0],dummy[1]);
253 }
254}
255
256
257static void drain_free(struct atm_dev *dev,int pool)
258{
259 skb_queue_purge(&ZATM_DEV(dev)->pool[pool]);
260}
261
262
263static int pool_index(int max_pdu)
264{
265 int i;
266
267 if (max_pdu % ATM_CELL_PAYLOAD)
268 printk(KERN_ERR DEV_LABEL ": driver error in pool_index: "
269 "max_pdu is %d\n",max_pdu);
270 if (max_pdu > 65536) return -1;
271 for (i = 0; (64 << i) < max_pdu; i++);
272 return i+ZATM_AAL5_POOL_BASE;
273}
274
275
276/* use_pool isn't reentrant */
277
278
279static void use_pool(struct atm_dev *dev,int pool)
280{
281 struct zatm_dev *zatm_dev;
282 unsigned long flags;
283 int size;
284
285 zatm_dev = ZATM_DEV(dev);
286 if (!(zatm_dev->pool_info[pool].ref_count++)) {
287 skb_queue_head_init(&zatm_dev->pool[pool]);
288 size = pool-ZATM_AAL5_POOL_BASE;
289 if (size < 0) size = 0; /* 64B... */
290 else if (size > 10) size = 10; /* ... 64kB */
291 spin_lock_irqsave(&zatm_dev->lock, flags);
292 zpokel(zatm_dev,((zatm_dev->pool_info[pool].low_water/4) <<
293 uPD98401_RXFP_ALERT_SHIFT) |
294 (1 << uPD98401_RXFP_BTSZ_SHIFT) |
295 (size << uPD98401_RXFP_BFSZ_SHIFT),
296 zatm_dev->pool_base+pool*2);
297 zpokel(zatm_dev,(unsigned long) dummy,zatm_dev->pool_base+
298 pool*2+1);
299 spin_unlock_irqrestore(&zatm_dev->lock, flags);
300 zatm_dev->last_free[pool] = NULL;
301 refill_pool(dev,pool);
302 }
303 DPRINTK("pool %d: %d\n",pool,zatm_dev->pool_info[pool].ref_count);
304}
305
306
307static void unuse_pool(struct atm_dev *dev,int pool)
308{
309 if (!(--ZATM_DEV(dev)->pool_info[pool].ref_count))
310 drain_free(dev,pool);
311}
312
313/*----------------------------------- RX ------------------------------------*/
314
315
316#if 0
317static void exception(struct atm_vcc *vcc)
318{
319 static int count = 0;
320 struct zatm_dev *zatm_dev = ZATM_DEV(vcc->dev);
321 struct zatm_vcc *zatm_vcc = ZATM_VCC(vcc);
322 unsigned long *qrp;
323 int i;
324
325 if (count++ > 2) return;
326 for (i = 0; i < 8; i++)
327 printk("TX%d: 0x%08lx\n",i,
328 zpeekl(zatm_dev,zatm_vcc->tx_chan*VC_SIZE/4+i));
329 for (i = 0; i < 5; i++)
330 printk("SH%d: 0x%08lx\n",i,
331 zpeekl(zatm_dev,uPD98401_IM(zatm_vcc->shaper)+16*i));
332 qrp = (unsigned long *) zpeekl(zatm_dev,zatm_vcc->tx_chan*VC_SIZE/4+
333 uPD98401_TXVC_QRP);
334 printk("qrp=0x%08lx\n",(unsigned long) qrp);
335 for (i = 0; i < 4; i++) printk("QRP[%d]: 0x%08lx",i,qrp[i]);
336}
337#endif
338
339
340static const char *err_txt[] = {
341 "No error",
342 "RX buf underflow",
343 "RX FIFO overrun",
344 "Maximum len violation",
345 "CRC error",
346 "User abort",
347 "Length violation",
348 "T1 error",
349 "Deactivated",
350 "???",
351 "???",
352 "???",
353 "???",
354 "???",
355 "???",
356 "???"
357};
358
359
360static void poll_rx(struct atm_dev *dev,int mbx)
361{
362 struct zatm_dev *zatm_dev;
363 unsigned long pos;
364 u32 x;
365 int error;
366
367 EVENT("poll_rx\n",0,0);
368 zatm_dev = ZATM_DEV(dev);
369 pos = (zatm_dev->mbx_start[mbx] & ~0xffffUL) | zin(MTA(mbx));
370 while (x = zin(MWA(mbx)), (pos & 0xffff) != x) {
371 u32 *here;
372 struct sk_buff *skb;
373 struct atm_vcc *vcc;
374 int cells,size,chan;
375
376 EVENT("MBX: host 0x%lx, nic 0x%x\n",pos,x);
377 here = (u32 *) pos;
378 if (((pos += 16) & 0xffff) == zatm_dev->mbx_end[mbx])
379 pos = zatm_dev->mbx_start[mbx];
380 cells = here[0] & uPD98401_AAL5_SIZE;
381#if 0
382printk("RX IND: 0x%x, 0x%x, 0x%x, 0x%x\n",here[0],here[1],here[2],here[3]);
383{
384unsigned long *x;
385 printk("POOL: 0x%08x, 0x%08x\n",zpeekl(zatm_dev,
386 zatm_dev->pool_base),
387 zpeekl(zatm_dev,zatm_dev->pool_base+1));
388 x = (unsigned long *) here[2];
389 printk("[0..3] = 0x%08lx, 0x%08lx, 0x%08lx, 0x%08lx\n",
390 x[0],x[1],x[2],x[3]);
391}
392#endif
393 error = 0;
394 if (here[3] & uPD98401_AAL5_ERR) {
395 error = (here[3] & uPD98401_AAL5_ES) >>
396 uPD98401_AAL5_ES_SHIFT;
397 if (error == uPD98401_AAL5_ES_DEACT ||
398 error == uPD98401_AAL5_ES_FREE) continue;
399 }
400EVENT("error code 0x%x/0x%x\n",(here[3] & uPD98401_AAL5_ES) >>
401 uPD98401_AAL5_ES_SHIFT,error);
402 skb = ((struct rx_buffer_head *) bus_to_virt(here[2]))->skb;
403 __net_timestamp(skb);
404#if 0
405printk("[-3..0] 0x%08lx 0x%08lx 0x%08lx 0x%08lx\n",((unsigned *) skb->data)[-3],
406 ((unsigned *) skb->data)[-2],((unsigned *) skb->data)[-1],
407 ((unsigned *) skb->data)[0]);
408#endif
409 EVENT("skb 0x%lx, here 0x%lx\n",(unsigned long) skb,
410 (unsigned long) here);
411#if 0
412printk("dummy: 0x%08lx, 0x%08lx\n",dummy[0],dummy[1]);
413#endif
414 size = error ? 0 : ntohs(((__be16 *) skb->data)[cells*
415 ATM_CELL_PAYLOAD/sizeof(u16)-3]);
416 EVENT("got skb 0x%lx, size %d\n",(unsigned long) skb,size);
417 chan = (here[3] & uPD98401_AAL5_CHAN) >>
418 uPD98401_AAL5_CHAN_SHIFT;
419 if (chan < zatm_dev->chans && zatm_dev->rx_map[chan]) {
420 int pos;
421 vcc = zatm_dev->rx_map[chan];
422 pos = ZATM_VCC(vcc)->pool;
423 if (skb == zatm_dev->last_free[pos])
424 zatm_dev->last_free[pos] = NULL;
425 skb_unlink(skb, zatm_dev->pool + pos);
426 }
427 else {
428 printk(KERN_ERR DEV_LABEL "(itf %d): RX indication "
429 "for non-existing channel\n",dev->number);
430 size = 0;
431 vcc = NULL;
432 event_dump();
433 }
434 if (error) {
435 static unsigned long silence = 0;
436 static int last_error = 0;
437
438 if (error != last_error ||
439 time_after(jiffies, silence) || silence == 0){
440 printk(KERN_WARNING DEV_LABEL "(itf %d): "
441 "chan %d error %s\n",dev->number,chan,
442 err_txt[error]);
443 last_error = error;
444 silence = (jiffies+2*HZ)|1;
445 }
446 size = 0;
447 }
448 if (size && (size > cells*ATM_CELL_PAYLOAD-ATM_AAL5_TRAILER ||
449 size <= (cells-1)*ATM_CELL_PAYLOAD-ATM_AAL5_TRAILER)) {
450 printk(KERN_ERR DEV_LABEL "(itf %d): size %d with %d "
451 "cells\n",dev->number,size,cells);
452 size = 0;
453 event_dump();
454 }
455 if (size > ATM_MAX_AAL5_PDU) {
456 printk(KERN_ERR DEV_LABEL "(itf %d): size too big "
457 "(%d)\n",dev->number,size);
458 size = 0;
459 event_dump();
460 }
461 if (!size) {
462 dev_kfree_skb_irq(skb);
463 if (vcc) atomic_inc(&vcc->stats->rx_err);
464 continue;
465 }
466 if (!atm_charge(vcc,skb->truesize)) {
467 dev_kfree_skb_irq(skb);
468 continue;
469 }
470 skb->len = size;
471 ATM_SKB(skb)->vcc = vcc;
472 vcc->push(vcc,skb);
473 atomic_inc(&vcc->stats->rx);
474 }
475 zout(pos & 0xffff,MTA(mbx));
476#if 0 /* probably a stupid idea */
477 refill_pool(dev,zatm_vcc->pool);
478 /* maybe this saves us a few interrupts */
479#endif
480}
481
482
483static int open_rx_first(struct atm_vcc *vcc)
484{
485 struct zatm_dev *zatm_dev;
486 struct zatm_vcc *zatm_vcc;
487 unsigned long flags;
488 unsigned short chan;
489 int cells;
490
491 DPRINTK("open_rx_first (0x%x)\n",inb_p(0xc053));
492 zatm_dev = ZATM_DEV(vcc->dev);
493 zatm_vcc = ZATM_VCC(vcc);
494 zatm_vcc->rx_chan = 0;
495 if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0;
496 if (vcc->qos.aal == ATM_AAL5) {
497 if (vcc->qos.rxtp.max_sdu > 65464)
498 vcc->qos.rxtp.max_sdu = 65464;
499 /* fix this - we may want to receive 64kB SDUs
500 later */
501 cells = DIV_ROUND_UP(vcc->qos.rxtp.max_sdu + ATM_AAL5_TRAILER,
502 ATM_CELL_PAYLOAD);
503 zatm_vcc->pool = pool_index(cells*ATM_CELL_PAYLOAD);
504 }
505 else {
506 cells = 1;
507 zatm_vcc->pool = ZATM_AAL0_POOL;
508 }
509 if (zatm_vcc->pool < 0) return -EMSGSIZE;
510 spin_lock_irqsave(&zatm_dev->lock, flags);
511 zwait;
512 zout(uPD98401_OPEN_CHAN,CMR);
513 zwait;
514 DPRINTK("0x%x 0x%x\n",zin(CMR),zin(CER));
515 chan = (zin(CMR) & uPD98401_CHAN_ADDR) >> uPD98401_CHAN_ADDR_SHIFT;
516 spin_unlock_irqrestore(&zatm_dev->lock, flags);
517 DPRINTK("chan is %d\n",chan);
518 if (!chan) return -EAGAIN;
519 use_pool(vcc->dev,zatm_vcc->pool);
520 DPRINTK("pool %d\n",zatm_vcc->pool);
521 /* set up VC descriptor */
522 spin_lock_irqsave(&zatm_dev->lock, flags);
523 zpokel(zatm_dev,zatm_vcc->pool << uPD98401_RXVC_POOL_SHIFT,
524 chan*VC_SIZE/4);
525 zpokel(zatm_dev,uPD98401_RXVC_OD | (vcc->qos.aal == ATM_AAL5 ?
526 uPD98401_RXVC_AR : 0) | cells,chan*VC_SIZE/4+1);
527 zpokel(zatm_dev,0,chan*VC_SIZE/4+2);
528 zatm_vcc->rx_chan = chan;
529 zatm_dev->rx_map[chan] = vcc;
530 spin_unlock_irqrestore(&zatm_dev->lock, flags);
531 return 0;
532}
533
534
535static int open_rx_second(struct atm_vcc *vcc)
536{
537 struct zatm_dev *zatm_dev;
538 struct zatm_vcc *zatm_vcc;
539 unsigned long flags;
540 int pos,shift;
541
542 DPRINTK("open_rx_second (0x%x)\n",inb_p(0xc053));
543 zatm_dev = ZATM_DEV(vcc->dev);
544 zatm_vcc = ZATM_VCC(vcc);
545 if (!zatm_vcc->rx_chan) return 0;
546 spin_lock_irqsave(&zatm_dev->lock, flags);
547 /* should also handle VPI @@@ */
548 pos = vcc->vci >> 1;
549 shift = (1-(vcc->vci & 1)) << 4;
550 zpokel(zatm_dev,(zpeekl(zatm_dev,pos) & ~(0xffff << shift)) |
551 ((zatm_vcc->rx_chan | uPD98401_RXLT_ENBL) << shift),pos);
552 spin_unlock_irqrestore(&zatm_dev->lock, flags);
553 return 0;
554}
555
556
557static void close_rx(struct atm_vcc *vcc)
558{
559 struct zatm_dev *zatm_dev;
560 struct zatm_vcc *zatm_vcc;
561 unsigned long flags;
562 int pos,shift;
563
564 zatm_vcc = ZATM_VCC(vcc);
565 zatm_dev = ZATM_DEV(vcc->dev);
566 if (!zatm_vcc->rx_chan) return;
567 DPRINTK("close_rx\n");
568 /* disable receiver */
569 if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) {
570 spin_lock_irqsave(&zatm_dev->lock, flags);
571 pos = vcc->vci >> 1;
572 shift = (1-(vcc->vci & 1)) << 4;
573 zpokel(zatm_dev,zpeekl(zatm_dev,pos) & ~(0xffff << shift),pos);
574 zwait;
575 zout(uPD98401_NOP,CMR);
576 zwait;
577 zout(uPD98401_NOP,CMR);
578 spin_unlock_irqrestore(&zatm_dev->lock, flags);
579 }
580 spin_lock_irqsave(&zatm_dev->lock, flags);
581 zwait;
582 zout(uPD98401_DEACT_CHAN | uPD98401_CHAN_RT | (zatm_vcc->rx_chan <<
583 uPD98401_CHAN_ADDR_SHIFT),CMR);
584 zwait;
585 udelay(10); /* why oh why ... ? */
586 zout(uPD98401_CLOSE_CHAN | uPD98401_CHAN_RT | (zatm_vcc->rx_chan <<
587 uPD98401_CHAN_ADDR_SHIFT),CMR);
588 zwait;
589 if (!(zin(CMR) & uPD98401_CHAN_ADDR))
590 printk(KERN_CRIT DEV_LABEL "(itf %d): can't close RX channel "
591 "%d\n",vcc->dev->number,zatm_vcc->rx_chan);
592 spin_unlock_irqrestore(&zatm_dev->lock, flags);
593 zatm_dev->rx_map[zatm_vcc->rx_chan] = NULL;
594 zatm_vcc->rx_chan = 0;
595 unuse_pool(vcc->dev,zatm_vcc->pool);
596}
597
598
599static int start_rx(struct atm_dev *dev)
600{
601 struct zatm_dev *zatm_dev;
602 int size,i;
603
604DPRINTK("start_rx\n");
605 zatm_dev = ZATM_DEV(dev);
606 size = sizeof(struct atm_vcc *)*zatm_dev->chans;
607 zatm_dev->rx_map = kzalloc(size,GFP_KERNEL);
608 if (!zatm_dev->rx_map) return -ENOMEM;
609 /* set VPI/VCI split (use all VCIs and give what's left to VPIs) */
610 zpokel(zatm_dev,(1 << dev->ci_range.vci_bits)-1,uPD98401_VRR);
611 /* prepare free buffer pools */
612 for (i = 0; i <= ZATM_LAST_POOL; i++) {
613 zatm_dev->pool_info[i].ref_count = 0;
614 zatm_dev->pool_info[i].rqa_count = 0;
615 zatm_dev->pool_info[i].rqu_count = 0;
616 zatm_dev->pool_info[i].low_water = LOW_MARK;
617 zatm_dev->pool_info[i].high_water = HIGH_MARK;
618 zatm_dev->pool_info[i].offset = 0;
619 zatm_dev->pool_info[i].next_off = 0;
620 zatm_dev->pool_info[i].next_cnt = 0;
621 zatm_dev->pool_info[i].next_thres = OFF_CNG_THRES;
622 }
623 return 0;
624}
625
626
627/*----------------------------------- TX ------------------------------------*/
628
629
630static int do_tx(struct sk_buff *skb)
631{
632 struct atm_vcc *vcc;
633 struct zatm_dev *zatm_dev;
634 struct zatm_vcc *zatm_vcc;
635 u32 *dsc;
636 unsigned long flags;
637
638 EVENT("do_tx\n",0,0);
639 DPRINTK("sending skb %p\n",skb);
640 vcc = ATM_SKB(skb)->vcc;
641 zatm_dev = ZATM_DEV(vcc->dev);
642 zatm_vcc = ZATM_VCC(vcc);
643 EVENT("iovcnt=%d\n",skb_shinfo(skb)->nr_frags,0);
644 spin_lock_irqsave(&zatm_dev->lock, flags);
645 if (!skb_shinfo(skb)->nr_frags) {
646 if (zatm_vcc->txing == RING_ENTRIES-1) {
647 spin_unlock_irqrestore(&zatm_dev->lock, flags);
648 return RING_BUSY;
649 }
650 zatm_vcc->txing++;
651 dsc = zatm_vcc->ring+zatm_vcc->ring_curr;
652 zatm_vcc->ring_curr = (zatm_vcc->ring_curr+RING_WORDS) &
653 (RING_ENTRIES*RING_WORDS-1);
654 dsc[1] = 0;
655 dsc[2] = skb->len;
656 dsc[3] = virt_to_bus(skb->data);
657 mb();
658 dsc[0] = uPD98401_TXPD_V | uPD98401_TXPD_DP | uPD98401_TXPD_SM
659 | (vcc->qos.aal == ATM_AAL5 ? uPD98401_TXPD_AAL5 : 0 |
660 (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ?
661 uPD98401_CLPM_1 : uPD98401_CLPM_0));
662 EVENT("dsc (0x%lx)\n",(unsigned long) dsc,0);
663 }
664 else {
665printk("NONONONOO!!!!\n");
666 dsc = NULL;
667#if 0
668 u32 *put;
669 int i;
670
671 dsc = kmalloc(uPD98401_TXPD_SIZE * 2 +
672 uPD98401_TXBD_SIZE * ATM_SKB(skb)->iovcnt, GFP_ATOMIC);
673 if (!dsc) {
674 if (vcc->pop)
675 vcc->pop(vcc, skb);
676 else
677 dev_kfree_skb_irq(skb);
678 return -EAGAIN;
679 }
680 /* @@@ should check alignment */
681 put = dsc+8;
682 dsc[0] = uPD98401_TXPD_V | uPD98401_TXPD_DP |
683 (vcc->aal == ATM_AAL5 ? uPD98401_TXPD_AAL5 : 0 |
684 (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ?
685 uPD98401_CLPM_1 : uPD98401_CLPM_0));
686 dsc[1] = 0;
687 dsc[2] = ATM_SKB(skb)->iovcnt * uPD98401_TXBD_SIZE;
688 dsc[3] = virt_to_bus(put);
689 for (i = 0; i < ATM_SKB(skb)->iovcnt; i++) {
690 *put++ = ((struct iovec *) skb->data)[i].iov_len;
691 *put++ = virt_to_bus(((struct iovec *)
692 skb->data)[i].iov_base);
693 }
694 put[-2] |= uPD98401_TXBD_LAST;
695#endif
696 }
697 ZATM_PRV_DSC(skb) = dsc;
698 skb_queue_tail(&zatm_vcc->tx_queue,skb);
699 DPRINTK("QRP=0x%08lx\n",zpeekl(zatm_dev,zatm_vcc->tx_chan*VC_SIZE/4+
700 uPD98401_TXVC_QRP));
701 zwait;
702 zout(uPD98401_TX_READY | (zatm_vcc->tx_chan <<
703 uPD98401_CHAN_ADDR_SHIFT),CMR);
704 spin_unlock_irqrestore(&zatm_dev->lock, flags);
705 EVENT("done\n",0,0);
706 return 0;
707}
708
709
710static inline void dequeue_tx(struct atm_vcc *vcc)
711{
712 struct zatm_vcc *zatm_vcc;
713 struct sk_buff *skb;
714
715 EVENT("dequeue_tx\n",0,0);
716 zatm_vcc = ZATM_VCC(vcc);
717 skb = skb_dequeue(&zatm_vcc->tx_queue);
718 if (!skb) {
719 printk(KERN_CRIT DEV_LABEL "(itf %d): dequeue_tx but not "
720 "txing\n",vcc->dev->number);
721 return;
722 }
723#if 0 /* @@@ would fail on CLP */
724if (*ZATM_PRV_DSC(skb) != (uPD98401_TXPD_V | uPD98401_TXPD_DP |
725 uPD98401_TXPD_SM | uPD98401_TXPD_AAL5)) printk("@#*$!!!! (%08x)\n",
726 *ZATM_PRV_DSC(skb));
727#endif
728 *ZATM_PRV_DSC(skb) = 0; /* mark as invalid */
729 zatm_vcc->txing--;
730 if (vcc->pop) vcc->pop(vcc,skb);
731 else dev_kfree_skb_irq(skb);
732 while ((skb = skb_dequeue(&zatm_vcc->backlog)))
733 if (do_tx(skb) == RING_BUSY) {
734 skb_queue_head(&zatm_vcc->backlog,skb);
735 break;
736 }
737 atomic_inc(&vcc->stats->tx);
738 wake_up(&zatm_vcc->tx_wait);
739}
740
741
742static void poll_tx(struct atm_dev *dev,int mbx)
743{
744 struct zatm_dev *zatm_dev;
745 unsigned long pos;
746 u32 x;
747
748 EVENT("poll_tx\n",0,0);
749 zatm_dev = ZATM_DEV(dev);
750 pos = (zatm_dev->mbx_start[mbx] & ~0xffffUL) | zin(MTA(mbx));
751 while (x = zin(MWA(mbx)), (pos & 0xffff) != x) {
752 int chan;
753
754#if 1
755 u32 data,*addr;
756
757 EVENT("MBX: host 0x%lx, nic 0x%x\n",pos,x);
758 addr = (u32 *) pos;
759 data = *addr;
760 chan = (data & uPD98401_TXI_CONN) >> uPD98401_TXI_CONN_SHIFT;
761 EVENT("addr = 0x%lx, data = 0x%08x,",(unsigned long) addr,
762 data);
763 EVENT("chan = %d\n",chan,0);
764#else
765NO !
766 chan = (zatm_dev->mbx_start[mbx][pos >> 2] & uPD98401_TXI_CONN)
767 >> uPD98401_TXI_CONN_SHIFT;
768#endif
769 if (chan < zatm_dev->chans && zatm_dev->tx_map[chan])
770 dequeue_tx(zatm_dev->tx_map[chan]);
771 else {
772 printk(KERN_CRIT DEV_LABEL "(itf %d): TX indication "
773 "for non-existing channel %d\n",dev->number,chan);
774 event_dump();
775 }
776 if (((pos += 4) & 0xffff) == zatm_dev->mbx_end[mbx])
777 pos = zatm_dev->mbx_start[mbx];
778 }
779 zout(pos & 0xffff,MTA(mbx));
780}
781
782
783/*
784 * BUG BUG BUG: Doesn't handle "new-style" rate specification yet.
785 */
786
787static int alloc_shaper(struct atm_dev *dev,int *pcr,int min,int max,int ubr)
788{
789 struct zatm_dev *zatm_dev;
790 unsigned long flags;
791 unsigned long i,m,c;
792 int shaper;
793
794 DPRINTK("alloc_shaper (min = %d, max = %d)\n",min,max);
795 zatm_dev = ZATM_DEV(dev);
796 if (!zatm_dev->free_shapers) return -EAGAIN;
797 for (shaper = 0; !((zatm_dev->free_shapers >> shaper) & 1); shaper++);
798 zatm_dev->free_shapers &= ~1 << shaper;
799 if (ubr) {
800 c = 5;
801 i = m = 1;
802 zatm_dev->ubr_ref_cnt++;
803 zatm_dev->ubr = shaper;
804 *pcr = 0;
805 }
806 else {
807 if (min) {
808 if (min <= 255) {
809 i = min;
810 m = ATM_OC3_PCR;
811 }
812 else {
813 i = 255;
814 m = ATM_OC3_PCR*255/min;
815 }
816 }
817 else {
818 if (max > zatm_dev->tx_bw) max = zatm_dev->tx_bw;
819 if (max <= 255) {
820 i = max;
821 m = ATM_OC3_PCR;
822 }
823 else {
824 i = 255;
825 m = DIV_ROUND_UP(ATM_OC3_PCR*255, max);
826 }
827 }
828 if (i > m) {
829 printk(KERN_CRIT DEV_LABEL "shaper algorithm botched "
830 "[%d,%d] -> i=%ld,m=%ld\n",min,max,i,m);
831 m = i;
832 }
833 *pcr = i*ATM_OC3_PCR/m;
834 c = 20; /* @@@ should use max_cdv ! */
835 if ((min && *pcr < min) || (max && *pcr > max)) return -EINVAL;
836 if (zatm_dev->tx_bw < *pcr) return -EAGAIN;
837 zatm_dev->tx_bw -= *pcr;
838 }
839 spin_lock_irqsave(&zatm_dev->lock, flags);
840 DPRINTK("i = %d, m = %d, PCR = %d\n",i,m,*pcr);
841 zpokel(zatm_dev,(i << uPD98401_IM_I_SHIFT) | m,uPD98401_IM(shaper));
842 zpokel(zatm_dev,c << uPD98401_PC_C_SHIFT,uPD98401_PC(shaper));
843 zpokel(zatm_dev,0,uPD98401_X(shaper));
844 zpokel(zatm_dev,0,uPD98401_Y(shaper));
845 zpokel(zatm_dev,uPD98401_PS_E,uPD98401_PS(shaper));
846 spin_unlock_irqrestore(&zatm_dev->lock, flags);
847 return shaper;
848}
849
850
851static void dealloc_shaper(struct atm_dev *dev,int shaper)
852{
853 struct zatm_dev *zatm_dev;
854 unsigned long flags;
855
856 zatm_dev = ZATM_DEV(dev);
857 if (shaper == zatm_dev->ubr) {
858 if (--zatm_dev->ubr_ref_cnt) return;
859 zatm_dev->ubr = -1;
860 }
861 spin_lock_irqsave(&zatm_dev->lock, flags);
862 zpokel(zatm_dev,zpeekl(zatm_dev,uPD98401_PS(shaper)) & ~uPD98401_PS_E,
863 uPD98401_PS(shaper));
864 spin_unlock_irqrestore(&zatm_dev->lock, flags);
865 zatm_dev->free_shapers |= 1 << shaper;
866}
867
868
869static void close_tx(struct atm_vcc *vcc)
870{
871 struct zatm_dev *zatm_dev;
872 struct zatm_vcc *zatm_vcc;
873 unsigned long flags;
874 int chan;
875
876 zatm_vcc = ZATM_VCC(vcc);
877 zatm_dev = ZATM_DEV(vcc->dev);
878 chan = zatm_vcc->tx_chan;
879 if (!chan) return;
880 DPRINTK("close_tx\n");
881 if (skb_peek(&zatm_vcc->backlog)) {
882 printk("waiting for backlog to drain ...\n");
883 event_dump();
884 wait_event(zatm_vcc->tx_wait, !skb_peek(&zatm_vcc->backlog));
885 }
886 if (skb_peek(&zatm_vcc->tx_queue)) {
887 printk("waiting for TX queue to drain ...\n");
888 event_dump();
889 wait_event(zatm_vcc->tx_wait, !skb_peek(&zatm_vcc->tx_queue));
890 }
891 spin_lock_irqsave(&zatm_dev->lock, flags);
892#if 0
893 zwait;
894 zout(uPD98401_DEACT_CHAN | (chan << uPD98401_CHAN_ADDR_SHIFT),CMR);
895#endif
896 zwait;
897 zout(uPD98401_CLOSE_CHAN | (chan << uPD98401_CHAN_ADDR_SHIFT),CMR);
898 zwait;
899 if (!(zin(CMR) & uPD98401_CHAN_ADDR))
900 printk(KERN_CRIT DEV_LABEL "(itf %d): can't close TX channel "
901 "%d\n",vcc->dev->number,chan);
902 spin_unlock_irqrestore(&zatm_dev->lock, flags);
903 zatm_vcc->tx_chan = 0;
904 zatm_dev->tx_map[chan] = NULL;
905 if (zatm_vcc->shaper != zatm_dev->ubr) {
906 zatm_dev->tx_bw += vcc->qos.txtp.min_pcr;
907 dealloc_shaper(vcc->dev,zatm_vcc->shaper);
908 }
909 kfree(zatm_vcc->ring);
910}
911
912
913static int open_tx_first(struct atm_vcc *vcc)
914{
915 struct zatm_dev *zatm_dev;
916 struct zatm_vcc *zatm_vcc;
917 unsigned long flags;
918 u32 *loop;
919 unsigned short chan;
920 int unlimited;
921
922 DPRINTK("open_tx_first\n");
923 zatm_dev = ZATM_DEV(vcc->dev);
924 zatm_vcc = ZATM_VCC(vcc);
925 zatm_vcc->tx_chan = 0;
926 if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0;
927 spin_lock_irqsave(&zatm_dev->lock, flags);
928 zwait;
929 zout(uPD98401_OPEN_CHAN,CMR);
930 zwait;
931 DPRINTK("0x%x 0x%x\n",zin(CMR),zin(CER));
932 chan = (zin(CMR) & uPD98401_CHAN_ADDR) >> uPD98401_CHAN_ADDR_SHIFT;
933 spin_unlock_irqrestore(&zatm_dev->lock, flags);
934 DPRINTK("chan is %d\n",chan);
935 if (!chan) return -EAGAIN;
936 unlimited = vcc->qos.txtp.traffic_class == ATM_UBR &&
937 (!vcc->qos.txtp.max_pcr || vcc->qos.txtp.max_pcr == ATM_MAX_PCR ||
938 vcc->qos.txtp.max_pcr >= ATM_OC3_PCR);
939 if (unlimited && zatm_dev->ubr != -1) zatm_vcc->shaper = zatm_dev->ubr;
940 else {
941 int uninitialized_var(pcr);
942
943 if (unlimited) vcc->qos.txtp.max_sdu = ATM_MAX_AAL5_PDU;
944 if ((zatm_vcc->shaper = alloc_shaper(vcc->dev,&pcr,
945 vcc->qos.txtp.min_pcr,vcc->qos.txtp.max_pcr,unlimited))
946 < 0) {
947 close_tx(vcc);
948 return zatm_vcc->shaper;
949 }
950 if (pcr > ATM_OC3_PCR) pcr = ATM_OC3_PCR;
951 vcc->qos.txtp.min_pcr = vcc->qos.txtp.max_pcr = pcr;
952 }
953 zatm_vcc->tx_chan = chan;
954 skb_queue_head_init(&zatm_vcc->tx_queue);
955 init_waitqueue_head(&zatm_vcc->tx_wait);
956 /* initialize ring */
957 zatm_vcc->ring = kzalloc(RING_SIZE,GFP_KERNEL);
958 if (!zatm_vcc->ring) return -ENOMEM;
959 loop = zatm_vcc->ring+RING_ENTRIES*RING_WORDS;
960 loop[0] = uPD98401_TXPD_V;
961 loop[1] = loop[2] = 0;
962 loop[3] = virt_to_bus(zatm_vcc->ring);
963 zatm_vcc->ring_curr = 0;
964 zatm_vcc->txing = 0;
965 skb_queue_head_init(&zatm_vcc->backlog);
966 zpokel(zatm_dev,virt_to_bus(zatm_vcc->ring),
967 chan*VC_SIZE/4+uPD98401_TXVC_QRP);
968 return 0;
969}
970
971
972static int open_tx_second(struct atm_vcc *vcc)
973{
974 struct zatm_dev *zatm_dev;
975 struct zatm_vcc *zatm_vcc;
976 unsigned long flags;
977
978 DPRINTK("open_tx_second\n");
979 zatm_dev = ZATM_DEV(vcc->dev);
980 zatm_vcc = ZATM_VCC(vcc);
981 if (!zatm_vcc->tx_chan) return 0;
982 /* set up VC descriptor */
983 spin_lock_irqsave(&zatm_dev->lock, flags);
984 zpokel(zatm_dev,0,zatm_vcc->tx_chan*VC_SIZE/4);
985 zpokel(zatm_dev,uPD98401_TXVC_L | (zatm_vcc->shaper <<
986 uPD98401_TXVC_SHP_SHIFT) | (vcc->vpi << uPD98401_TXVC_VPI_SHIFT) |
987 vcc->vci,zatm_vcc->tx_chan*VC_SIZE/4+1);
988 zpokel(zatm_dev,0,zatm_vcc->tx_chan*VC_SIZE/4+2);
989 spin_unlock_irqrestore(&zatm_dev->lock, flags);
990 zatm_dev->tx_map[zatm_vcc->tx_chan] = vcc;
991 return 0;
992}
993
994
995static int start_tx(struct atm_dev *dev)
996{
997 struct zatm_dev *zatm_dev;
998 int i;
999
1000 DPRINTK("start_tx\n");
1001 zatm_dev = ZATM_DEV(dev);
1002 zatm_dev->tx_map = kmalloc(sizeof(struct atm_vcc *)*
1003 zatm_dev->chans,GFP_KERNEL);
1004 if (!zatm_dev->tx_map) return -ENOMEM;
1005 zatm_dev->tx_bw = ATM_OC3_PCR;
1006 zatm_dev->free_shapers = (1 << NR_SHAPERS)-1;
1007 zatm_dev->ubr = -1;
1008 zatm_dev->ubr_ref_cnt = 0;
1009 /* initialize shapers */
1010 for (i = 0; i < NR_SHAPERS; i++) zpokel(zatm_dev,0,uPD98401_PS(i));
1011 return 0;
1012}
1013
1014
1015/*------------------------------- interrupts --------------------------------*/
1016
1017
1018static irqreturn_t zatm_int(int irq,void *dev_id)
1019{
1020 struct atm_dev *dev;
1021 struct zatm_dev *zatm_dev;
1022 u32 reason;
1023 int handled = 0;
1024
1025 dev = dev_id;
1026 zatm_dev = ZATM_DEV(dev);
1027 while ((reason = zin(GSR))) {
1028 handled = 1;
1029 EVENT("reason 0x%x\n",reason,0);
1030 if (reason & uPD98401_INT_PI) {
1031 EVENT("PHY int\n",0,0);
1032 dev->phy->interrupt(dev);
1033 }
1034 if (reason & uPD98401_INT_RQA) {
1035 unsigned long pools;
1036 int i;
1037
1038 pools = zin(RQA);
1039 EVENT("RQA (0x%08x)\n",pools,0);
1040 for (i = 0; pools; i++) {
1041 if (pools & 1) {
1042 refill_pool(dev,i);
1043 zatm_dev->pool_info[i].rqa_count++;
1044 }
1045 pools >>= 1;
1046 }
1047 }
1048 if (reason & uPD98401_INT_RQU) {
1049 unsigned long pools;
1050 int i;
1051 pools = zin(RQU);
1052 printk(KERN_WARNING DEV_LABEL "(itf %d): RQU 0x%08lx\n",
1053 dev->number,pools);
1054 event_dump();
1055 for (i = 0; pools; i++) {
1056 if (pools & 1) {
1057 refill_pool(dev,i);
1058 zatm_dev->pool_info[i].rqu_count++;
1059 }
1060 pools >>= 1;
1061 }
1062 }
1063 /* don't handle RD */
1064 if (reason & uPD98401_INT_SPE)
1065 printk(KERN_ALERT DEV_LABEL "(itf %d): system parity "
1066 "error at 0x%08x\n",dev->number,zin(ADDR));
1067 if (reason & uPD98401_INT_CPE)
1068 printk(KERN_ALERT DEV_LABEL "(itf %d): control memory "
1069 "parity error at 0x%08x\n",dev->number,zin(ADDR));
1070 if (reason & uPD98401_INT_SBE) {
1071 printk(KERN_ALERT DEV_LABEL "(itf %d): system bus "
1072 "error at 0x%08x\n",dev->number,zin(ADDR));
1073 event_dump();
1074 }
1075 /* don't handle IND */
1076 if (reason & uPD98401_INT_MF) {
1077 printk(KERN_CRIT DEV_LABEL "(itf %d): mailbox full "
1078 "(0x%x)\n",dev->number,(reason & uPD98401_INT_MF)
1079 >> uPD98401_INT_MF_SHIFT);
1080 event_dump();
1081 /* @@@ should try to recover */
1082 }
1083 if (reason & uPD98401_INT_MM) {
1084 if (reason & 1) poll_rx(dev,0);
1085 if (reason & 2) poll_rx(dev,1);
1086 if (reason & 4) poll_tx(dev,2);
1087 if (reason & 8) poll_tx(dev,3);
1088 }
1089 /* @@@ handle RCRn */
1090 }
1091 return IRQ_RETVAL(handled);
1092}
1093
1094
1095/*----------------------------- (E)EPROM access -----------------------------*/
1096
1097
1098static void __devinit eprom_set(struct zatm_dev *zatm_dev,unsigned long value,
1099 unsigned short cmd)
1100{
1101 int error;
1102
1103 if ((error = pci_write_config_dword(zatm_dev->pci_dev,cmd,value)))
1104 printk(KERN_ERR DEV_LABEL ": PCI write failed (0x%02x)\n",
1105 error);
1106}
1107
1108
1109static unsigned long __devinit eprom_get(struct zatm_dev *zatm_dev,
1110 unsigned short cmd)
1111{
1112 unsigned int value;
1113 int error;
1114
1115 if ((error = pci_read_config_dword(zatm_dev->pci_dev,cmd,&value)))
1116 printk(KERN_ERR DEV_LABEL ": PCI read failed (0x%02x)\n",
1117 error);
1118 return value;
1119}
1120
1121
1122static void __devinit eprom_put_bits(struct zatm_dev *zatm_dev,
1123 unsigned long data,int bits,unsigned short cmd)
1124{
1125 unsigned long value;
1126 int i;
1127
1128 for (i = bits-1; i >= 0; i--) {
1129 value = ZEPROM_CS | (((data >> i) & 1) ? ZEPROM_DI : 0);
1130 eprom_set(zatm_dev,value,cmd);
1131 eprom_set(zatm_dev,value | ZEPROM_SK,cmd);
1132 eprom_set(zatm_dev,value,cmd);
1133 }
1134}
1135
1136
1137static void __devinit eprom_get_byte(struct zatm_dev *zatm_dev,
1138 unsigned char *byte,unsigned short cmd)
1139{
1140 int i;
1141
1142 *byte = 0;
1143 for (i = 8; i; i--) {
1144 eprom_set(zatm_dev,ZEPROM_CS,cmd);
1145 eprom_set(zatm_dev,ZEPROM_CS | ZEPROM_SK,cmd);
1146 *byte <<= 1;
1147 if (eprom_get(zatm_dev,cmd) & ZEPROM_DO) *byte |= 1;
1148 eprom_set(zatm_dev,ZEPROM_CS,cmd);
1149 }
1150}
1151
1152
1153static unsigned char __devinit eprom_try_esi(struct atm_dev *dev,
1154 unsigned short cmd,int offset,int swap)
1155{
1156 unsigned char buf[ZEPROM_SIZE];
1157 struct zatm_dev *zatm_dev;
1158 int i;
1159
1160 zatm_dev = ZATM_DEV(dev);
1161 for (i = 0; i < ZEPROM_SIZE; i += 2) {
1162 eprom_set(zatm_dev,ZEPROM_CS,cmd); /* select EPROM */
1163 eprom_put_bits(zatm_dev,ZEPROM_CMD_READ,ZEPROM_CMD_LEN,cmd);
1164 eprom_put_bits(zatm_dev,i >> 1,ZEPROM_ADDR_LEN,cmd);
1165 eprom_get_byte(zatm_dev,buf+i+swap,cmd);
1166 eprom_get_byte(zatm_dev,buf+i+1-swap,cmd);
1167 eprom_set(zatm_dev,0,cmd); /* deselect EPROM */
1168 }
1169 memcpy(dev->esi,buf+offset,ESI_LEN);
1170 return memcmp(dev->esi,"\0\0\0\0\0",ESI_LEN); /* assumes ESI_LEN == 6 */
1171}
1172
1173
1174static void __devinit eprom_get_esi(struct atm_dev *dev)
1175{
1176 if (eprom_try_esi(dev,ZEPROM_V1_REG,ZEPROM_V1_ESI_OFF,1)) return;
1177 (void) eprom_try_esi(dev,ZEPROM_V2_REG,ZEPROM_V2_ESI_OFF,0);
1178}
1179
1180
1181/*--------------------------------- entries ---------------------------------*/
1182
1183
1184static int __devinit zatm_init(struct atm_dev *dev)
1185{
1186 struct zatm_dev *zatm_dev;
1187 struct pci_dev *pci_dev;
1188 unsigned short command;
1189 int error,i,last;
1190 unsigned long t0,t1,t2;
1191
1192 DPRINTK(">zatm_init\n");
1193 zatm_dev = ZATM_DEV(dev);
1194 spin_lock_init(&zatm_dev->lock);
1195 pci_dev = zatm_dev->pci_dev;
1196 zatm_dev->base = pci_resource_start(pci_dev, 0);
1197 zatm_dev->irq = pci_dev->irq;
1198 if ((error = pci_read_config_word(pci_dev,PCI_COMMAND,&command))) {
1199 printk(KERN_ERR DEV_LABEL "(itf %d): init error 0x%02x\n",
1200 dev->number,error);
1201 return -EINVAL;
1202 }
1203 if ((error = pci_write_config_word(pci_dev,PCI_COMMAND,
1204 command | PCI_COMMAND_IO | PCI_COMMAND_MASTER))) {
1205 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable IO (0x%02x)"
1206 "\n",dev->number,error);
1207 return -EIO;
1208 }
1209 eprom_get_esi(dev);
1210 printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%x,irq=%d,",
1211 dev->number,pci_dev->revision,zatm_dev->base,zatm_dev->irq);
1212 /* reset uPD98401 */
1213 zout(0,SWR);
1214 while (!(zin(GSR) & uPD98401_INT_IND));
1215 zout(uPD98401_GMR_ONE /*uPD98401_BURST4*/,GMR);
1216 last = MAX_CRAM_SIZE;
1217 for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) {
1218 zpokel(zatm_dev,0x55555555,i);
1219 if (zpeekl(zatm_dev,i) != 0x55555555) last = i;
1220 else {
1221 zpokel(zatm_dev,0xAAAAAAAA,i);
1222 if (zpeekl(zatm_dev,i) != 0xAAAAAAAA) last = i;
1223 else zpokel(zatm_dev,i,i);
1224 }
1225 }
1226 for (i = 0; i < last; i += RAM_INCREMENT)
1227 if (zpeekl(zatm_dev,i) != i) break;
1228 zatm_dev->mem = i << 2;
1229 while (i) zpokel(zatm_dev,0,--i);
1230 /* reset again to rebuild memory pointers */
1231 zout(0,SWR);
1232 while (!(zin(GSR) & uPD98401_INT_IND));
1233 zout(uPD98401_GMR_ONE | uPD98401_BURST8 | uPD98401_BURST4 |
1234 uPD98401_BURST2 | uPD98401_GMR_PM | uPD98401_GMR_DR,GMR);
1235 /* TODO: should shrink allocation now */
1236 printk("mem=%dkB,%s (",zatm_dev->mem >> 10,zatm_dev->copper ? "UTP" :
1237 "MMF");
1238 for (i = 0; i < ESI_LEN; i++)
1239 printk("%02X%s",dev->esi[i],i == ESI_LEN-1 ? ")\n" : "-");
1240 do {
1241 unsigned long flags;
1242
1243 spin_lock_irqsave(&zatm_dev->lock, flags);
1244 t0 = zpeekl(zatm_dev,uPD98401_TSR);
1245 udelay(10);
1246 t1 = zpeekl(zatm_dev,uPD98401_TSR);
1247 udelay(1010);
1248 t2 = zpeekl(zatm_dev,uPD98401_TSR);
1249 spin_unlock_irqrestore(&zatm_dev->lock, flags);
1250 }
1251 while (t0 > t1 || t1 > t2); /* loop if wrapping ... */
1252 zatm_dev->khz = t2-2*t1+t0;
1253 printk(KERN_NOTICE DEV_LABEL "(itf %d): uPD98401 %d.%d at %d.%03d "
1254 "MHz\n",dev->number,
1255 (zin(VER) & uPD98401_MAJOR) >> uPD98401_MAJOR_SHIFT,
1256 zin(VER) & uPD98401_MINOR,zatm_dev->khz/1000,zatm_dev->khz % 1000);
1257 return uPD98402_init(dev);
1258}
1259
1260
1261static int __devinit zatm_start(struct atm_dev *dev)
1262{
1263 struct zatm_dev *zatm_dev = ZATM_DEV(dev);
1264 struct pci_dev *pdev = zatm_dev->pci_dev;
1265 unsigned long curr;
1266 int pools,vccs,rx;
1267 int error, i, ld;
1268
1269 DPRINTK("zatm_start\n");
1270 zatm_dev->rx_map = zatm_dev->tx_map = NULL;
1271 for (i = 0; i < NR_MBX; i++)
1272 zatm_dev->mbx_start[i] = 0;
1273 error = request_irq(zatm_dev->irq, zatm_int, IRQF_SHARED, DEV_LABEL, dev);
1274 if (error < 0) {
1275 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
1276 dev->number,zatm_dev->irq);
1277 goto done;
1278 }
1279 /* define memory regions */
1280 pools = NR_POOLS;
1281 if (NR_SHAPERS*SHAPER_SIZE > pools*POOL_SIZE)
1282 pools = NR_SHAPERS*SHAPER_SIZE/POOL_SIZE;
1283 vccs = (zatm_dev->mem-NR_SHAPERS*SHAPER_SIZE-pools*POOL_SIZE)/
1284 (2*VC_SIZE+RX_SIZE);
1285 ld = -1;
1286 for (rx = 1; rx < vccs; rx <<= 1) ld++;
1287 dev->ci_range.vpi_bits = 0; /* @@@ no VPI for now */
1288 dev->ci_range.vci_bits = ld;
1289 dev->link_rate = ATM_OC3_PCR;
1290 zatm_dev->chans = vccs; /* ??? */
1291 curr = rx*RX_SIZE/4;
1292 DPRINTK("RX pool 0x%08lx\n",curr);
1293 zpokel(zatm_dev,curr,uPD98401_PMA); /* receive pool */
1294 zatm_dev->pool_base = curr;
1295 curr += pools*POOL_SIZE/4;
1296 DPRINTK("Shapers 0x%08lx\n",curr);
1297 zpokel(zatm_dev,curr,uPD98401_SMA); /* shapers */
1298 curr += NR_SHAPERS*SHAPER_SIZE/4;
1299 DPRINTK("Free 0x%08lx\n",curr);
1300 zpokel(zatm_dev,curr,uPD98401_TOS); /* free pool */
1301 printk(KERN_INFO DEV_LABEL "(itf %d): %d shapers, %d pools, %d RX, "
1302 "%ld VCs\n",dev->number,NR_SHAPERS,pools,rx,
1303 (zatm_dev->mem-curr*4)/VC_SIZE);
1304 /* create mailboxes */
1305 for (i = 0; i < NR_MBX; i++) {
1306 void *mbx;
1307 dma_addr_t mbx_dma;
1308
1309 if (!mbx_entries[i])
1310 continue;
1311 mbx = pci_alloc_consistent(pdev, 2*MBX_SIZE(i), &mbx_dma);
1312 if (!mbx) {
1313 error = -ENOMEM;
1314 goto out;
1315 }
1316 /*
1317 * Alignment provided by pci_alloc_consistent() isn't enough
1318 * for this device.
1319 */
1320 if (((unsigned long)mbx ^ mbx_dma) & 0xffff) {
1321 printk(KERN_ERR DEV_LABEL "(itf %d): system "
1322 "bus incompatible with driver\n", dev->number);
1323 pci_free_consistent(pdev, 2*MBX_SIZE(i), mbx, mbx_dma);
1324 error = -ENODEV;
1325 goto out;
1326 }
1327 DPRINTK("mbx@0x%08lx-0x%08lx\n", mbx, mbx + MBX_SIZE(i));
1328 zatm_dev->mbx_start[i] = (unsigned long)mbx;
1329 zatm_dev->mbx_dma[i] = mbx_dma;
1330 zatm_dev->mbx_end[i] = (zatm_dev->mbx_start[i] + MBX_SIZE(i)) &
1331 0xffff;
1332 zout(mbx_dma >> 16, MSH(i));
1333 zout(mbx_dma, MSL(i));
1334 zout(zatm_dev->mbx_end[i], MBA(i));
1335 zout((unsigned long)mbx & 0xffff, MTA(i));
1336 zout((unsigned long)mbx & 0xffff, MWA(i));
1337 }
1338 error = start_tx(dev);
1339 if (error)
1340 goto out;
1341 error = start_rx(dev);
1342 if (error)
1343 goto out_tx;
1344 error = dev->phy->start(dev);
1345 if (error)
1346 goto out_rx;
1347 zout(0xffffffff,IMR); /* enable interrupts */
1348 /* enable TX & RX */
1349 zout(zin(GMR) | uPD98401_GMR_SE | uPD98401_GMR_RE,GMR);
1350done:
1351 return error;
1352
1353out_rx:
1354 kfree(zatm_dev->rx_map);
1355out_tx:
1356 kfree(zatm_dev->tx_map);
1357out:
1358 while (i-- > 0) {
1359 pci_free_consistent(pdev, 2*MBX_SIZE(i),
1360 (void *)zatm_dev->mbx_start[i],
1361 zatm_dev->mbx_dma[i]);
1362 }
1363 free_irq(zatm_dev->irq, dev);
1364 goto done;
1365}
1366
1367
1368static void zatm_close(struct atm_vcc *vcc)
1369{
1370 DPRINTK(">zatm_close\n");
1371 if (!ZATM_VCC(vcc)) return;
1372 clear_bit(ATM_VF_READY,&vcc->flags);
1373 close_rx(vcc);
1374 EVENT("close_tx\n",0,0);
1375 close_tx(vcc);
1376 DPRINTK("zatm_close: done waiting\n");
1377 /* deallocate memory */
1378 kfree(ZATM_VCC(vcc));
1379 vcc->dev_data = NULL;
1380 clear_bit(ATM_VF_ADDR,&vcc->flags);
1381}
1382
1383
1384static int zatm_open(struct atm_vcc *vcc)
1385{
1386 struct zatm_dev *zatm_dev;
1387 struct zatm_vcc *zatm_vcc;
1388 short vpi = vcc->vpi;
1389 int vci = vcc->vci;
1390 int error;
1391
1392 DPRINTK(">zatm_open\n");
1393 zatm_dev = ZATM_DEV(vcc->dev);
1394 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1395 vcc->dev_data = NULL;
1396 if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
1397 set_bit(ATM_VF_ADDR,&vcc->flags);
1398 if (vcc->qos.aal != ATM_AAL5) return -EINVAL; /* @@@ AAL0 */
1399 DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi,
1400 vcc->vci);
1401 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
1402 zatm_vcc = kmalloc(sizeof(struct zatm_vcc),GFP_KERNEL);
1403 if (!zatm_vcc) {
1404 clear_bit(ATM_VF_ADDR,&vcc->flags);
1405 return -ENOMEM;
1406 }
1407 vcc->dev_data = zatm_vcc;
1408 ZATM_VCC(vcc)->tx_chan = 0; /* for zatm_close after open_rx */
1409 if ((error = open_rx_first(vcc))) {
1410 zatm_close(vcc);
1411 return error;
1412 }
1413 if ((error = open_tx_first(vcc))) {
1414 zatm_close(vcc);
1415 return error;
1416 }
1417 }
1418 if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0;
1419 if ((error = open_rx_second(vcc))) {
1420 zatm_close(vcc);
1421 return error;
1422 }
1423 if ((error = open_tx_second(vcc))) {
1424 zatm_close(vcc);
1425 return error;
1426 }
1427 set_bit(ATM_VF_READY,&vcc->flags);
1428 return 0;
1429}
1430
1431
1432static int zatm_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flags)
1433{
1434 printk("Not yet implemented\n");
1435 return -ENOSYS;
1436 /* @@@ */
1437}
1438
1439
1440static int zatm_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
1441{
1442 struct zatm_dev *zatm_dev;
1443 unsigned long flags;
1444
1445 zatm_dev = ZATM_DEV(dev);
1446 switch (cmd) {
1447 case ZATM_GETPOOLZ:
1448 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1449 /* fall through */
1450 case ZATM_GETPOOL:
1451 {
1452 struct zatm_pool_info info;
1453 int pool;
1454
1455 if (get_user(pool,
1456 &((struct zatm_pool_req __user *) arg)->pool_num))
1457 return -EFAULT;
1458 if (pool < 0 || pool > ZATM_LAST_POOL)
1459 return -EINVAL;
1460 spin_lock_irqsave(&zatm_dev->lock, flags);
1461 info = zatm_dev->pool_info[pool];
1462 if (cmd == ZATM_GETPOOLZ) {
1463 zatm_dev->pool_info[pool].rqa_count = 0;
1464 zatm_dev->pool_info[pool].rqu_count = 0;
1465 }
1466 spin_unlock_irqrestore(&zatm_dev->lock, flags);
1467 return copy_to_user(
1468 &((struct zatm_pool_req __user *) arg)->info,
1469 &info,sizeof(info)) ? -EFAULT : 0;
1470 }
1471 case ZATM_SETPOOL:
1472 {
1473 struct zatm_pool_info info;
1474 int pool;
1475
1476 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1477 if (get_user(pool,
1478 &((struct zatm_pool_req __user *) arg)->pool_num))
1479 return -EFAULT;
1480 if (pool < 0 || pool > ZATM_LAST_POOL)
1481 return -EINVAL;
1482 if (copy_from_user(&info,
1483 &((struct zatm_pool_req __user *) arg)->info,
1484 sizeof(info))) return -EFAULT;
1485 if (!info.low_water)
1486 info.low_water = zatm_dev->
1487 pool_info[pool].low_water;
1488 if (!info.high_water)
1489 info.high_water = zatm_dev->
1490 pool_info[pool].high_water;
1491 if (!info.next_thres)
1492 info.next_thres = zatm_dev->
1493 pool_info[pool].next_thres;
1494 if (info.low_water >= info.high_water ||
1495 info.low_water < 0)
1496 return -EINVAL;
1497 spin_lock_irqsave(&zatm_dev->lock, flags);
1498 zatm_dev->pool_info[pool].low_water =
1499 info.low_water;
1500 zatm_dev->pool_info[pool].high_water =
1501 info.high_water;
1502 zatm_dev->pool_info[pool].next_thres =
1503 info.next_thres;
1504 spin_unlock_irqrestore(&zatm_dev->lock, flags);
1505 return 0;
1506 }
1507 default:
1508 if (!dev->phy->ioctl) return -ENOIOCTLCMD;
1509 return dev->phy->ioctl(dev,cmd,arg);
1510 }
1511}
1512
1513
1514static int zatm_getsockopt(struct atm_vcc *vcc,int level,int optname,
1515 void __user *optval,int optlen)
1516{
1517 return -EINVAL;
1518}
1519
1520
1521static int zatm_setsockopt(struct atm_vcc *vcc,int level,int optname,
1522 void __user *optval,unsigned int optlen)
1523{
1524 return -EINVAL;
1525}
1526
1527static int zatm_send(struct atm_vcc *vcc,struct sk_buff *skb)
1528{
1529 int error;
1530
1531 EVENT(">zatm_send 0x%lx\n",(unsigned long) skb,0);
1532 if (!ZATM_VCC(vcc)->tx_chan || !test_bit(ATM_VF_READY,&vcc->flags)) {
1533 if (vcc->pop) vcc->pop(vcc,skb);
1534 else dev_kfree_skb(skb);
1535 return -EINVAL;
1536 }
1537 if (!skb) {
1538 printk(KERN_CRIT "!skb in zatm_send ?\n");
1539 if (vcc->pop) vcc->pop(vcc,skb);
1540 return -EINVAL;
1541 }
1542 ATM_SKB(skb)->vcc = vcc;
1543 error = do_tx(skb);
1544 if (error != RING_BUSY) return error;
1545 skb_queue_tail(&ZATM_VCC(vcc)->backlog,skb);
1546 return 0;
1547}
1548
1549
1550static void zatm_phy_put(struct atm_dev *dev,unsigned char value,
1551 unsigned long addr)
1552{
1553 struct zatm_dev *zatm_dev;
1554
1555 zatm_dev = ZATM_DEV(dev);
1556 zwait;
1557 zout(value,CER);
1558 zout(uPD98401_IND_ACC | uPD98401_IA_B0 |
1559 (uPD98401_IA_TGT_PHY << uPD98401_IA_TGT_SHIFT) | addr,CMR);
1560}
1561
1562
1563static unsigned char zatm_phy_get(struct atm_dev *dev,unsigned long addr)
1564{
1565 struct zatm_dev *zatm_dev;
1566
1567 zatm_dev = ZATM_DEV(dev);
1568 zwait;
1569 zout(uPD98401_IND_ACC | uPD98401_IA_B0 | uPD98401_IA_RW |
1570 (uPD98401_IA_TGT_PHY << uPD98401_IA_TGT_SHIFT) | addr,CMR);
1571 zwait;
1572 return zin(CER) & 0xff;
1573}
1574
1575
1576static const struct atmdev_ops ops = {
1577 .open = zatm_open,
1578 .close = zatm_close,
1579 .ioctl = zatm_ioctl,
1580 .getsockopt = zatm_getsockopt,
1581 .setsockopt = zatm_setsockopt,
1582 .send = zatm_send,
1583 .phy_put = zatm_phy_put,
1584 .phy_get = zatm_phy_get,
1585 .change_qos = zatm_change_qos,
1586};
1587
1588static int __devinit zatm_init_one(struct pci_dev *pci_dev,
1589 const struct pci_device_id *ent)
1590{
1591 struct atm_dev *dev;
1592 struct zatm_dev *zatm_dev;
1593 int ret = -ENOMEM;
1594
1595 zatm_dev = kmalloc(sizeof(*zatm_dev), GFP_KERNEL);
1596 if (!zatm_dev) {
1597 printk(KERN_EMERG "%s: memory shortage\n", DEV_LABEL);
1598 goto out;
1599 }
1600
1601 dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL);
1602 if (!dev)
1603 goto out_free;
1604
1605 ret = pci_enable_device(pci_dev);
1606 if (ret < 0)
1607 goto out_deregister;
1608
1609 ret = pci_request_regions(pci_dev, DEV_LABEL);
1610 if (ret < 0)
1611 goto out_disable;
1612
1613 zatm_dev->pci_dev = pci_dev;
1614 dev->dev_data = zatm_dev;
1615 zatm_dev->copper = (int)ent->driver_data;
1616 if ((ret = zatm_init(dev)) || (ret = zatm_start(dev)))
1617 goto out_release;
1618
1619 pci_set_drvdata(pci_dev, dev);
1620 zatm_dev->more = zatm_boards;
1621 zatm_boards = dev;
1622 ret = 0;
1623out:
1624 return ret;
1625
1626out_release:
1627 pci_release_regions(pci_dev);
1628out_disable:
1629 pci_disable_device(pci_dev);
1630out_deregister:
1631 atm_dev_deregister(dev);
1632out_free:
1633 kfree(zatm_dev);
1634 goto out;
1635}
1636
1637
1638MODULE_LICENSE("GPL");
1639
1640static struct pci_device_id zatm_pci_tbl[] __devinitdata = {
1641 { PCI_VDEVICE(ZEITNET, PCI_DEVICE_ID_ZEITNET_1221), ZATM_COPPER },
1642 { PCI_VDEVICE(ZEITNET, PCI_DEVICE_ID_ZEITNET_1225), 0 },
1643 { 0, }
1644};
1645MODULE_DEVICE_TABLE(pci, zatm_pci_tbl);
1646
1647static struct pci_driver zatm_driver = {
1648 .name = DEV_LABEL,
1649 .id_table = zatm_pci_tbl,
1650 .probe = zatm_init_one,
1651};
1652
1653static int __init zatm_init_module(void)
1654{
1655 return pci_register_driver(&zatm_driver);
1656}
1657
1658module_init(zatm_init_module);
1659/* module_exit not defined so not unloadable */
1/* drivers/atm/zatm.c - ZeitNet ZN122x 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/netdevice.h>
16#include <linux/delay.h>
17#include <linux/uio.h>
18#include <linux/init.h>
19#include <linux/interrupt.h>
20#include <linux/dma-mapping.h>
21#include <linux/atm_zatm.h>
22#include <linux/capability.h>
23#include <linux/bitops.h>
24#include <linux/wait.h>
25#include <linux/slab.h>
26#include <asm/byteorder.h>
27#include <asm/string.h>
28#include <asm/io.h>
29#include <linux/atomic.h>
30#include <asm/uaccess.h>
31
32#include "uPD98401.h"
33#include "uPD98402.h"
34#include "zeprom.h"
35#include "zatm.h"
36
37
38/*
39 * TODO:
40 *
41 * Minor features
42 * - support 64 kB SDUs (will have to use multibuffer batches then :-( )
43 * - proper use of CDV, credit = max(1,CDVT*PCR)
44 * - AAL0
45 * - better receive timestamps
46 * - OAM
47 */
48
49#define ZATM_COPPER 1
50
51#if 0
52#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
53#else
54#define DPRINTK(format,args...)
55#endif
56
57#ifndef CONFIG_ATM_ZATM_DEBUG
58
59
60#define NULLCHECK(x)
61
62#define EVENT(s,a,b)
63
64
65static void event_dump(void)
66{
67}
68
69
70#else
71
72
73/*
74 * NULL pointer checking
75 */
76
77#define NULLCHECK(x) \
78 if ((unsigned long) (x) < 0x30) printk(KERN_CRIT #x "==0x%x\n", (int) (x))
79
80/*
81 * Very extensive activity logging. Greatly improves bug detection speed but
82 * costs a few Mbps if enabled.
83 */
84
85#define EV 64
86
87static const char *ev[EV];
88static unsigned long ev_a[EV],ev_b[EV];
89static int ec = 0;
90
91
92static void EVENT(const char *s,unsigned long a,unsigned long b)
93{
94 ev[ec] = s;
95 ev_a[ec] = a;
96 ev_b[ec] = b;
97 ec = (ec+1) % EV;
98}
99
100
101static void event_dump(void)
102{
103 int n,i;
104
105 printk(KERN_NOTICE "----- event dump follows -----\n");
106 for (n = 0; n < EV; n++) {
107 i = (ec+n) % EV;
108 printk(KERN_NOTICE);
109 printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]);
110 }
111 printk(KERN_NOTICE "----- event dump ends here -----\n");
112}
113
114
115#endif /* CONFIG_ATM_ZATM_DEBUG */
116
117
118#define RING_BUSY 1 /* indication from do_tx that PDU has to be
119 backlogged */
120
121static struct atm_dev *zatm_boards = NULL;
122static unsigned long dummy[2] = {0,0};
123
124
125#define zin_n(r) inl(zatm_dev->base+r*4)
126#define zin(r) inl(zatm_dev->base+uPD98401_##r*4)
127#define zout(v,r) outl(v,zatm_dev->base+uPD98401_##r*4)
128#define zwait while (zin(CMR) & uPD98401_BUSY)
129
130/* RX0, RX1, TX0, TX1 */
131static const int mbx_entries[NR_MBX] = { 1024,1024,1024,1024 };
132static const int mbx_esize[NR_MBX] = { 16,16,4,4 }; /* entry size in bytes */
133
134#define MBX_SIZE(i) (mbx_entries[i]*mbx_esize[i])
135
136
137/*-------------------------------- utilities --------------------------------*/
138
139
140static void zpokel(struct zatm_dev *zatm_dev,u32 value,u32 addr)
141{
142 zwait;
143 zout(value,CER);
144 zout(uPD98401_IND_ACC | uPD98401_IA_BALL |
145 (uPD98401_IA_TGT_CM << uPD98401_IA_TGT_SHIFT) | addr,CMR);
146}
147
148
149static u32 zpeekl(struct zatm_dev *zatm_dev,u32 addr)
150{
151 zwait;
152 zout(uPD98401_IND_ACC | uPD98401_IA_BALL | uPD98401_IA_RW |
153 (uPD98401_IA_TGT_CM << uPD98401_IA_TGT_SHIFT) | addr,CMR);
154 zwait;
155 return zin(CER);
156}
157
158
159/*------------------------------- free lists --------------------------------*/
160
161
162/*
163 * Free buffer head structure:
164 * [0] pointer to buffer (for SAR)
165 * [1] buffer descr link pointer (for SAR)
166 * [2] back pointer to skb (for poll_rx)
167 * [3] data
168 * ...
169 */
170
171struct rx_buffer_head {
172 u32 buffer; /* pointer to buffer (for SAR) */
173 u32 link; /* buffer descriptor link pointer (for SAR) */
174 struct sk_buff *skb; /* back pointer to skb (for poll_rx) */
175};
176
177
178static void refill_pool(struct atm_dev *dev,int pool)
179{
180 struct zatm_dev *zatm_dev;
181 struct sk_buff *skb;
182 struct rx_buffer_head *first;
183 unsigned long flags;
184 int align,offset,free,count,size;
185
186 EVENT("refill_pool\n",0,0);
187 zatm_dev = ZATM_DEV(dev);
188 size = (64 << (pool <= ZATM_AAL5_POOL_BASE ? 0 :
189 pool-ZATM_AAL5_POOL_BASE))+sizeof(struct rx_buffer_head);
190 if (size < PAGE_SIZE) {
191 align = 32; /* for 32 byte alignment */
192 offset = sizeof(struct rx_buffer_head);
193 }
194 else {
195 align = 4096;
196 offset = zatm_dev->pool_info[pool].offset+
197 sizeof(struct rx_buffer_head);
198 }
199 size += align;
200 spin_lock_irqsave(&zatm_dev->lock, flags);
201 free = zpeekl(zatm_dev,zatm_dev->pool_base+2*pool) &
202 uPD98401_RXFP_REMAIN;
203 spin_unlock_irqrestore(&zatm_dev->lock, flags);
204 if (free >= zatm_dev->pool_info[pool].low_water) return;
205 EVENT("starting ... POOL: 0x%x, 0x%x\n",
206 zpeekl(zatm_dev,zatm_dev->pool_base+2*pool),
207 zpeekl(zatm_dev,zatm_dev->pool_base+2*pool+1));
208 EVENT("dummy: 0x%08lx, 0x%08lx\n",dummy[0],dummy[1]);
209 count = 0;
210 first = NULL;
211 while (free < zatm_dev->pool_info[pool].high_water) {
212 struct rx_buffer_head *head;
213
214 skb = alloc_skb(size,GFP_ATOMIC);
215 if (!skb) {
216 printk(KERN_WARNING DEV_LABEL "(Itf %d): got no new "
217 "skb (%d) with %d free\n",dev->number,size,free);
218 break;
219 }
220 skb_reserve(skb,(unsigned char *) ((((unsigned long) skb->data+
221 align+offset-1) & ~(unsigned long) (align-1))-offset)-
222 skb->data);
223 head = (struct rx_buffer_head *) skb->data;
224 skb_reserve(skb,sizeof(struct rx_buffer_head));
225 if (!first) first = head;
226 count++;
227 head->buffer = virt_to_bus(skb->data);
228 head->link = 0;
229 head->skb = skb;
230 EVENT("enq skb 0x%08lx/0x%08lx\n",(unsigned long) skb,
231 (unsigned long) head);
232 spin_lock_irqsave(&zatm_dev->lock, flags);
233 if (zatm_dev->last_free[pool])
234 ((struct rx_buffer_head *) (zatm_dev->last_free[pool]->
235 data))[-1].link = virt_to_bus(head);
236 zatm_dev->last_free[pool] = skb;
237 skb_queue_tail(&zatm_dev->pool[pool],skb);
238 spin_unlock_irqrestore(&zatm_dev->lock, flags);
239 free++;
240 }
241 if (first) {
242 spin_lock_irqsave(&zatm_dev->lock, flags);
243 zwait;
244 zout(virt_to_bus(first),CER);
245 zout(uPD98401_ADD_BAT | (pool << uPD98401_POOL_SHIFT) | count,
246 CMR);
247 spin_unlock_irqrestore(&zatm_dev->lock, flags);
248 EVENT ("POOL: 0x%x, 0x%x\n",
249 zpeekl(zatm_dev,zatm_dev->pool_base+2*pool),
250 zpeekl(zatm_dev,zatm_dev->pool_base+2*pool+1));
251 EVENT("dummy: 0x%08lx, 0x%08lx\n",dummy[0],dummy[1]);
252 }
253}
254
255
256static void drain_free(struct atm_dev *dev,int pool)
257{
258 skb_queue_purge(&ZATM_DEV(dev)->pool[pool]);
259}
260
261
262static int pool_index(int max_pdu)
263{
264 int i;
265
266 if (max_pdu % ATM_CELL_PAYLOAD)
267 printk(KERN_ERR DEV_LABEL ": driver error in pool_index: "
268 "max_pdu is %d\n",max_pdu);
269 if (max_pdu > 65536) return -1;
270 for (i = 0; (64 << i) < max_pdu; i++);
271 return i+ZATM_AAL5_POOL_BASE;
272}
273
274
275/* use_pool isn't reentrant */
276
277
278static void use_pool(struct atm_dev *dev,int pool)
279{
280 struct zatm_dev *zatm_dev;
281 unsigned long flags;
282 int size;
283
284 zatm_dev = ZATM_DEV(dev);
285 if (!(zatm_dev->pool_info[pool].ref_count++)) {
286 skb_queue_head_init(&zatm_dev->pool[pool]);
287 size = pool-ZATM_AAL5_POOL_BASE;
288 if (size < 0) size = 0; /* 64B... */
289 else if (size > 10) size = 10; /* ... 64kB */
290 spin_lock_irqsave(&zatm_dev->lock, flags);
291 zpokel(zatm_dev,((zatm_dev->pool_info[pool].low_water/4) <<
292 uPD98401_RXFP_ALERT_SHIFT) |
293 (1 << uPD98401_RXFP_BTSZ_SHIFT) |
294 (size << uPD98401_RXFP_BFSZ_SHIFT),
295 zatm_dev->pool_base+pool*2);
296 zpokel(zatm_dev,(unsigned long) dummy,zatm_dev->pool_base+
297 pool*2+1);
298 spin_unlock_irqrestore(&zatm_dev->lock, flags);
299 zatm_dev->last_free[pool] = NULL;
300 refill_pool(dev,pool);
301 }
302 DPRINTK("pool %d: %d\n",pool,zatm_dev->pool_info[pool].ref_count);
303}
304
305
306static void unuse_pool(struct atm_dev *dev,int pool)
307{
308 if (!(--ZATM_DEV(dev)->pool_info[pool].ref_count))
309 drain_free(dev,pool);
310}
311
312/*----------------------------------- RX ------------------------------------*/
313
314
315#if 0
316static void exception(struct atm_vcc *vcc)
317{
318 static int count = 0;
319 struct zatm_dev *zatm_dev = ZATM_DEV(vcc->dev);
320 struct zatm_vcc *zatm_vcc = ZATM_VCC(vcc);
321 unsigned long *qrp;
322 int i;
323
324 if (count++ > 2) return;
325 for (i = 0; i < 8; i++)
326 printk("TX%d: 0x%08lx\n",i,
327 zpeekl(zatm_dev,zatm_vcc->tx_chan*VC_SIZE/4+i));
328 for (i = 0; i < 5; i++)
329 printk("SH%d: 0x%08lx\n",i,
330 zpeekl(zatm_dev,uPD98401_IM(zatm_vcc->shaper)+16*i));
331 qrp = (unsigned long *) zpeekl(zatm_dev,zatm_vcc->tx_chan*VC_SIZE/4+
332 uPD98401_TXVC_QRP);
333 printk("qrp=0x%08lx\n",(unsigned long) qrp);
334 for (i = 0; i < 4; i++) printk("QRP[%d]: 0x%08lx",i,qrp[i]);
335}
336#endif
337
338
339static const char *err_txt[] = {
340 "No error",
341 "RX buf underflow",
342 "RX FIFO overrun",
343 "Maximum len violation",
344 "CRC error",
345 "User abort",
346 "Length violation",
347 "T1 error",
348 "Deactivated",
349 "???",
350 "???",
351 "???",
352 "???",
353 "???",
354 "???",
355 "???"
356};
357
358
359static void poll_rx(struct atm_dev *dev,int mbx)
360{
361 struct zatm_dev *zatm_dev;
362 unsigned long pos;
363 u32 x;
364 int error;
365
366 EVENT("poll_rx\n",0,0);
367 zatm_dev = ZATM_DEV(dev);
368 pos = (zatm_dev->mbx_start[mbx] & ~0xffffUL) | zin(MTA(mbx));
369 while (x = zin(MWA(mbx)), (pos & 0xffff) != x) {
370 u32 *here;
371 struct sk_buff *skb;
372 struct atm_vcc *vcc;
373 int cells,size,chan;
374
375 EVENT("MBX: host 0x%lx, nic 0x%x\n",pos,x);
376 here = (u32 *) pos;
377 if (((pos += 16) & 0xffff) == zatm_dev->mbx_end[mbx])
378 pos = zatm_dev->mbx_start[mbx];
379 cells = here[0] & uPD98401_AAL5_SIZE;
380#if 0
381printk("RX IND: 0x%x, 0x%x, 0x%x, 0x%x\n",here[0],here[1],here[2],here[3]);
382{
383unsigned long *x;
384 printk("POOL: 0x%08x, 0x%08x\n",zpeekl(zatm_dev,
385 zatm_dev->pool_base),
386 zpeekl(zatm_dev,zatm_dev->pool_base+1));
387 x = (unsigned long *) here[2];
388 printk("[0..3] = 0x%08lx, 0x%08lx, 0x%08lx, 0x%08lx\n",
389 x[0],x[1],x[2],x[3]);
390}
391#endif
392 error = 0;
393 if (here[3] & uPD98401_AAL5_ERR) {
394 error = (here[3] & uPD98401_AAL5_ES) >>
395 uPD98401_AAL5_ES_SHIFT;
396 if (error == uPD98401_AAL5_ES_DEACT ||
397 error == uPD98401_AAL5_ES_FREE) continue;
398 }
399EVENT("error code 0x%x/0x%x\n",(here[3] & uPD98401_AAL5_ES) >>
400 uPD98401_AAL5_ES_SHIFT,error);
401 skb = ((struct rx_buffer_head *) bus_to_virt(here[2]))->skb;
402 __net_timestamp(skb);
403#if 0
404printk("[-3..0] 0x%08lx 0x%08lx 0x%08lx 0x%08lx\n",((unsigned *) skb->data)[-3],
405 ((unsigned *) skb->data)[-2],((unsigned *) skb->data)[-1],
406 ((unsigned *) skb->data)[0]);
407#endif
408 EVENT("skb 0x%lx, here 0x%lx\n",(unsigned long) skb,
409 (unsigned long) here);
410#if 0
411printk("dummy: 0x%08lx, 0x%08lx\n",dummy[0],dummy[1]);
412#endif
413 size = error ? 0 : ntohs(((__be16 *) skb->data)[cells*
414 ATM_CELL_PAYLOAD/sizeof(u16)-3]);
415 EVENT("got skb 0x%lx, size %d\n",(unsigned long) skb,size);
416 chan = (here[3] & uPD98401_AAL5_CHAN) >>
417 uPD98401_AAL5_CHAN_SHIFT;
418 if (chan < zatm_dev->chans && zatm_dev->rx_map[chan]) {
419 int pos;
420 vcc = zatm_dev->rx_map[chan];
421 pos = ZATM_VCC(vcc)->pool;
422 if (skb == zatm_dev->last_free[pos])
423 zatm_dev->last_free[pos] = NULL;
424 skb_unlink(skb, zatm_dev->pool + pos);
425 }
426 else {
427 printk(KERN_ERR DEV_LABEL "(itf %d): RX indication "
428 "for non-existing channel\n",dev->number);
429 size = 0;
430 vcc = NULL;
431 event_dump();
432 }
433 if (error) {
434 static unsigned long silence = 0;
435 static int last_error = 0;
436
437 if (error != last_error ||
438 time_after(jiffies, silence) || silence == 0){
439 printk(KERN_WARNING DEV_LABEL "(itf %d): "
440 "chan %d error %s\n",dev->number,chan,
441 err_txt[error]);
442 last_error = error;
443 silence = (jiffies+2*HZ)|1;
444 }
445 size = 0;
446 }
447 if (size && (size > cells*ATM_CELL_PAYLOAD-ATM_AAL5_TRAILER ||
448 size <= (cells-1)*ATM_CELL_PAYLOAD-ATM_AAL5_TRAILER)) {
449 printk(KERN_ERR DEV_LABEL "(itf %d): size %d with %d "
450 "cells\n",dev->number,size,cells);
451 size = 0;
452 event_dump();
453 }
454 if (size > ATM_MAX_AAL5_PDU) {
455 printk(KERN_ERR DEV_LABEL "(itf %d): size too big "
456 "(%d)\n",dev->number,size);
457 size = 0;
458 event_dump();
459 }
460 if (!size) {
461 dev_kfree_skb_irq(skb);
462 if (vcc) atomic_inc(&vcc->stats->rx_err);
463 continue;
464 }
465 if (!atm_charge(vcc,skb->truesize)) {
466 dev_kfree_skb_irq(skb);
467 continue;
468 }
469 skb->len = size;
470 ATM_SKB(skb)->vcc = vcc;
471 vcc->push(vcc,skb);
472 atomic_inc(&vcc->stats->rx);
473 }
474 zout(pos & 0xffff,MTA(mbx));
475#if 0 /* probably a stupid idea */
476 refill_pool(dev,zatm_vcc->pool);
477 /* maybe this saves us a few interrupts */
478#endif
479}
480
481
482static int open_rx_first(struct atm_vcc *vcc)
483{
484 struct zatm_dev *zatm_dev;
485 struct zatm_vcc *zatm_vcc;
486 unsigned long flags;
487 unsigned short chan;
488 int cells;
489
490 DPRINTK("open_rx_first (0x%x)\n",inb_p(0xc053));
491 zatm_dev = ZATM_DEV(vcc->dev);
492 zatm_vcc = ZATM_VCC(vcc);
493 zatm_vcc->rx_chan = 0;
494 if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0;
495 if (vcc->qos.aal == ATM_AAL5) {
496 if (vcc->qos.rxtp.max_sdu > 65464)
497 vcc->qos.rxtp.max_sdu = 65464;
498 /* fix this - we may want to receive 64kB SDUs
499 later */
500 cells = DIV_ROUND_UP(vcc->qos.rxtp.max_sdu + ATM_AAL5_TRAILER,
501 ATM_CELL_PAYLOAD);
502 zatm_vcc->pool = pool_index(cells*ATM_CELL_PAYLOAD);
503 }
504 else {
505 cells = 1;
506 zatm_vcc->pool = ZATM_AAL0_POOL;
507 }
508 if (zatm_vcc->pool < 0) return -EMSGSIZE;
509 spin_lock_irqsave(&zatm_dev->lock, flags);
510 zwait;
511 zout(uPD98401_OPEN_CHAN,CMR);
512 zwait;
513 DPRINTK("0x%x 0x%x\n",zin(CMR),zin(CER));
514 chan = (zin(CMR) & uPD98401_CHAN_ADDR) >> uPD98401_CHAN_ADDR_SHIFT;
515 spin_unlock_irqrestore(&zatm_dev->lock, flags);
516 DPRINTK("chan is %d\n",chan);
517 if (!chan) return -EAGAIN;
518 use_pool(vcc->dev,zatm_vcc->pool);
519 DPRINTK("pool %d\n",zatm_vcc->pool);
520 /* set up VC descriptor */
521 spin_lock_irqsave(&zatm_dev->lock, flags);
522 zpokel(zatm_dev,zatm_vcc->pool << uPD98401_RXVC_POOL_SHIFT,
523 chan*VC_SIZE/4);
524 zpokel(zatm_dev,uPD98401_RXVC_OD | (vcc->qos.aal == ATM_AAL5 ?
525 uPD98401_RXVC_AR : 0) | cells,chan*VC_SIZE/4+1);
526 zpokel(zatm_dev,0,chan*VC_SIZE/4+2);
527 zatm_vcc->rx_chan = chan;
528 zatm_dev->rx_map[chan] = vcc;
529 spin_unlock_irqrestore(&zatm_dev->lock, flags);
530 return 0;
531}
532
533
534static int open_rx_second(struct atm_vcc *vcc)
535{
536 struct zatm_dev *zatm_dev;
537 struct zatm_vcc *zatm_vcc;
538 unsigned long flags;
539 int pos,shift;
540
541 DPRINTK("open_rx_second (0x%x)\n",inb_p(0xc053));
542 zatm_dev = ZATM_DEV(vcc->dev);
543 zatm_vcc = ZATM_VCC(vcc);
544 if (!zatm_vcc->rx_chan) return 0;
545 spin_lock_irqsave(&zatm_dev->lock, flags);
546 /* should also handle VPI @@@ */
547 pos = vcc->vci >> 1;
548 shift = (1-(vcc->vci & 1)) << 4;
549 zpokel(zatm_dev,(zpeekl(zatm_dev,pos) & ~(0xffff << shift)) |
550 ((zatm_vcc->rx_chan | uPD98401_RXLT_ENBL) << shift),pos);
551 spin_unlock_irqrestore(&zatm_dev->lock, flags);
552 return 0;
553}
554
555
556static void close_rx(struct atm_vcc *vcc)
557{
558 struct zatm_dev *zatm_dev;
559 struct zatm_vcc *zatm_vcc;
560 unsigned long flags;
561 int pos,shift;
562
563 zatm_vcc = ZATM_VCC(vcc);
564 zatm_dev = ZATM_DEV(vcc->dev);
565 if (!zatm_vcc->rx_chan) return;
566 DPRINTK("close_rx\n");
567 /* disable receiver */
568 if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) {
569 spin_lock_irqsave(&zatm_dev->lock, flags);
570 pos = vcc->vci >> 1;
571 shift = (1-(vcc->vci & 1)) << 4;
572 zpokel(zatm_dev,zpeekl(zatm_dev,pos) & ~(0xffff << shift),pos);
573 zwait;
574 zout(uPD98401_NOP,CMR);
575 zwait;
576 zout(uPD98401_NOP,CMR);
577 spin_unlock_irqrestore(&zatm_dev->lock, flags);
578 }
579 spin_lock_irqsave(&zatm_dev->lock, flags);
580 zwait;
581 zout(uPD98401_DEACT_CHAN | uPD98401_CHAN_RT | (zatm_vcc->rx_chan <<
582 uPD98401_CHAN_ADDR_SHIFT),CMR);
583 zwait;
584 udelay(10); /* why oh why ... ? */
585 zout(uPD98401_CLOSE_CHAN | uPD98401_CHAN_RT | (zatm_vcc->rx_chan <<
586 uPD98401_CHAN_ADDR_SHIFT),CMR);
587 zwait;
588 if (!(zin(CMR) & uPD98401_CHAN_ADDR))
589 printk(KERN_CRIT DEV_LABEL "(itf %d): can't close RX channel "
590 "%d\n",vcc->dev->number,zatm_vcc->rx_chan);
591 spin_unlock_irqrestore(&zatm_dev->lock, flags);
592 zatm_dev->rx_map[zatm_vcc->rx_chan] = NULL;
593 zatm_vcc->rx_chan = 0;
594 unuse_pool(vcc->dev,zatm_vcc->pool);
595}
596
597
598static int start_rx(struct atm_dev *dev)
599{
600 struct zatm_dev *zatm_dev;
601 int size,i;
602
603DPRINTK("start_rx\n");
604 zatm_dev = ZATM_DEV(dev);
605 size = sizeof(struct atm_vcc *)*zatm_dev->chans;
606 zatm_dev->rx_map = kzalloc(size,GFP_KERNEL);
607 if (!zatm_dev->rx_map) return -ENOMEM;
608 /* set VPI/VCI split (use all VCIs and give what's left to VPIs) */
609 zpokel(zatm_dev,(1 << dev->ci_range.vci_bits)-1,uPD98401_VRR);
610 /* prepare free buffer pools */
611 for (i = 0; i <= ZATM_LAST_POOL; i++) {
612 zatm_dev->pool_info[i].ref_count = 0;
613 zatm_dev->pool_info[i].rqa_count = 0;
614 zatm_dev->pool_info[i].rqu_count = 0;
615 zatm_dev->pool_info[i].low_water = LOW_MARK;
616 zatm_dev->pool_info[i].high_water = HIGH_MARK;
617 zatm_dev->pool_info[i].offset = 0;
618 zatm_dev->pool_info[i].next_off = 0;
619 zatm_dev->pool_info[i].next_cnt = 0;
620 zatm_dev->pool_info[i].next_thres = OFF_CNG_THRES;
621 }
622 return 0;
623}
624
625
626/*----------------------------------- TX ------------------------------------*/
627
628
629static int do_tx(struct sk_buff *skb)
630{
631 struct atm_vcc *vcc;
632 struct zatm_dev *zatm_dev;
633 struct zatm_vcc *zatm_vcc;
634 u32 *dsc;
635 unsigned long flags;
636
637 EVENT("do_tx\n",0,0);
638 DPRINTK("sending skb %p\n",skb);
639 vcc = ATM_SKB(skb)->vcc;
640 zatm_dev = ZATM_DEV(vcc->dev);
641 zatm_vcc = ZATM_VCC(vcc);
642 EVENT("iovcnt=%d\n",skb_shinfo(skb)->nr_frags,0);
643 spin_lock_irqsave(&zatm_dev->lock, flags);
644 if (!skb_shinfo(skb)->nr_frags) {
645 if (zatm_vcc->txing == RING_ENTRIES-1) {
646 spin_unlock_irqrestore(&zatm_dev->lock, flags);
647 return RING_BUSY;
648 }
649 zatm_vcc->txing++;
650 dsc = zatm_vcc->ring+zatm_vcc->ring_curr;
651 zatm_vcc->ring_curr = (zatm_vcc->ring_curr+RING_WORDS) &
652 (RING_ENTRIES*RING_WORDS-1);
653 dsc[1] = 0;
654 dsc[2] = skb->len;
655 dsc[3] = virt_to_bus(skb->data);
656 mb();
657 dsc[0] = uPD98401_TXPD_V | uPD98401_TXPD_DP | uPD98401_TXPD_SM
658 | (vcc->qos.aal == ATM_AAL5 ? uPD98401_TXPD_AAL5 : 0 |
659 (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ?
660 uPD98401_CLPM_1 : uPD98401_CLPM_0));
661 EVENT("dsc (0x%lx)\n",(unsigned long) dsc,0);
662 }
663 else {
664printk("NONONONOO!!!!\n");
665 dsc = NULL;
666#if 0
667 u32 *put;
668 int i;
669
670 dsc = kmalloc(uPD98401_TXPD_SIZE * 2 +
671 uPD98401_TXBD_SIZE * ATM_SKB(skb)->iovcnt, GFP_ATOMIC);
672 if (!dsc) {
673 if (vcc->pop)
674 vcc->pop(vcc, skb);
675 else
676 dev_kfree_skb_irq(skb);
677 return -EAGAIN;
678 }
679 /* @@@ should check alignment */
680 put = dsc+8;
681 dsc[0] = uPD98401_TXPD_V | uPD98401_TXPD_DP |
682 (vcc->aal == ATM_AAL5 ? uPD98401_TXPD_AAL5 : 0 |
683 (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ?
684 uPD98401_CLPM_1 : uPD98401_CLPM_0));
685 dsc[1] = 0;
686 dsc[2] = ATM_SKB(skb)->iovcnt * uPD98401_TXBD_SIZE;
687 dsc[3] = virt_to_bus(put);
688 for (i = 0; i < ATM_SKB(skb)->iovcnt; i++) {
689 *put++ = ((struct iovec *) skb->data)[i].iov_len;
690 *put++ = virt_to_bus(((struct iovec *)
691 skb->data)[i].iov_base);
692 }
693 put[-2] |= uPD98401_TXBD_LAST;
694#endif
695 }
696 ZATM_PRV_DSC(skb) = dsc;
697 skb_queue_tail(&zatm_vcc->tx_queue,skb);
698 DPRINTK("QRP=0x%08lx\n",zpeekl(zatm_dev,zatm_vcc->tx_chan*VC_SIZE/4+
699 uPD98401_TXVC_QRP));
700 zwait;
701 zout(uPD98401_TX_READY | (zatm_vcc->tx_chan <<
702 uPD98401_CHAN_ADDR_SHIFT),CMR);
703 spin_unlock_irqrestore(&zatm_dev->lock, flags);
704 EVENT("done\n",0,0);
705 return 0;
706}
707
708
709static inline void dequeue_tx(struct atm_vcc *vcc)
710{
711 struct zatm_vcc *zatm_vcc;
712 struct sk_buff *skb;
713
714 EVENT("dequeue_tx\n",0,0);
715 zatm_vcc = ZATM_VCC(vcc);
716 skb = skb_dequeue(&zatm_vcc->tx_queue);
717 if (!skb) {
718 printk(KERN_CRIT DEV_LABEL "(itf %d): dequeue_tx but not "
719 "txing\n",vcc->dev->number);
720 return;
721 }
722#if 0 /* @@@ would fail on CLP */
723if (*ZATM_PRV_DSC(skb) != (uPD98401_TXPD_V | uPD98401_TXPD_DP |
724 uPD98401_TXPD_SM | uPD98401_TXPD_AAL5)) printk("@#*$!!!! (%08x)\n",
725 *ZATM_PRV_DSC(skb));
726#endif
727 *ZATM_PRV_DSC(skb) = 0; /* mark as invalid */
728 zatm_vcc->txing--;
729 if (vcc->pop) vcc->pop(vcc,skb);
730 else dev_kfree_skb_irq(skb);
731 while ((skb = skb_dequeue(&zatm_vcc->backlog)))
732 if (do_tx(skb) == RING_BUSY) {
733 skb_queue_head(&zatm_vcc->backlog,skb);
734 break;
735 }
736 atomic_inc(&vcc->stats->tx);
737 wake_up(&zatm_vcc->tx_wait);
738}
739
740
741static void poll_tx(struct atm_dev *dev,int mbx)
742{
743 struct zatm_dev *zatm_dev;
744 unsigned long pos;
745 u32 x;
746
747 EVENT("poll_tx\n",0,0);
748 zatm_dev = ZATM_DEV(dev);
749 pos = (zatm_dev->mbx_start[mbx] & ~0xffffUL) | zin(MTA(mbx));
750 while (x = zin(MWA(mbx)), (pos & 0xffff) != x) {
751 int chan;
752
753#if 1
754 u32 data,*addr;
755
756 EVENT("MBX: host 0x%lx, nic 0x%x\n",pos,x);
757 addr = (u32 *) pos;
758 data = *addr;
759 chan = (data & uPD98401_TXI_CONN) >> uPD98401_TXI_CONN_SHIFT;
760 EVENT("addr = 0x%lx, data = 0x%08x,",(unsigned long) addr,
761 data);
762 EVENT("chan = %d\n",chan,0);
763#else
764NO !
765 chan = (zatm_dev->mbx_start[mbx][pos >> 2] & uPD98401_TXI_CONN)
766 >> uPD98401_TXI_CONN_SHIFT;
767#endif
768 if (chan < zatm_dev->chans && zatm_dev->tx_map[chan])
769 dequeue_tx(zatm_dev->tx_map[chan]);
770 else {
771 printk(KERN_CRIT DEV_LABEL "(itf %d): TX indication "
772 "for non-existing channel %d\n",dev->number,chan);
773 event_dump();
774 }
775 if (((pos += 4) & 0xffff) == zatm_dev->mbx_end[mbx])
776 pos = zatm_dev->mbx_start[mbx];
777 }
778 zout(pos & 0xffff,MTA(mbx));
779}
780
781
782/*
783 * BUG BUG BUG: Doesn't handle "new-style" rate specification yet.
784 */
785
786static int alloc_shaper(struct atm_dev *dev,int *pcr,int min,int max,int ubr)
787{
788 struct zatm_dev *zatm_dev;
789 unsigned long flags;
790 unsigned long i,m,c;
791 int shaper;
792
793 DPRINTK("alloc_shaper (min = %d, max = %d)\n",min,max);
794 zatm_dev = ZATM_DEV(dev);
795 if (!zatm_dev->free_shapers) return -EAGAIN;
796 for (shaper = 0; !((zatm_dev->free_shapers >> shaper) & 1); shaper++);
797 zatm_dev->free_shapers &= ~1 << shaper;
798 if (ubr) {
799 c = 5;
800 i = m = 1;
801 zatm_dev->ubr_ref_cnt++;
802 zatm_dev->ubr = shaper;
803 *pcr = 0;
804 }
805 else {
806 if (min) {
807 if (min <= 255) {
808 i = min;
809 m = ATM_OC3_PCR;
810 }
811 else {
812 i = 255;
813 m = ATM_OC3_PCR*255/min;
814 }
815 }
816 else {
817 if (max > zatm_dev->tx_bw) max = zatm_dev->tx_bw;
818 if (max <= 255) {
819 i = max;
820 m = ATM_OC3_PCR;
821 }
822 else {
823 i = 255;
824 m = DIV_ROUND_UP(ATM_OC3_PCR*255, max);
825 }
826 }
827 if (i > m) {
828 printk(KERN_CRIT DEV_LABEL "shaper algorithm botched "
829 "[%d,%d] -> i=%ld,m=%ld\n",min,max,i,m);
830 m = i;
831 }
832 *pcr = i*ATM_OC3_PCR/m;
833 c = 20; /* @@@ should use max_cdv ! */
834 if ((min && *pcr < min) || (max && *pcr > max)) return -EINVAL;
835 if (zatm_dev->tx_bw < *pcr) return -EAGAIN;
836 zatm_dev->tx_bw -= *pcr;
837 }
838 spin_lock_irqsave(&zatm_dev->lock, flags);
839 DPRINTK("i = %d, m = %d, PCR = %d\n",i,m,*pcr);
840 zpokel(zatm_dev,(i << uPD98401_IM_I_SHIFT) | m,uPD98401_IM(shaper));
841 zpokel(zatm_dev,c << uPD98401_PC_C_SHIFT,uPD98401_PC(shaper));
842 zpokel(zatm_dev,0,uPD98401_X(shaper));
843 zpokel(zatm_dev,0,uPD98401_Y(shaper));
844 zpokel(zatm_dev,uPD98401_PS_E,uPD98401_PS(shaper));
845 spin_unlock_irqrestore(&zatm_dev->lock, flags);
846 return shaper;
847}
848
849
850static void dealloc_shaper(struct atm_dev *dev,int shaper)
851{
852 struct zatm_dev *zatm_dev;
853 unsigned long flags;
854
855 zatm_dev = ZATM_DEV(dev);
856 if (shaper == zatm_dev->ubr) {
857 if (--zatm_dev->ubr_ref_cnt) return;
858 zatm_dev->ubr = -1;
859 }
860 spin_lock_irqsave(&zatm_dev->lock, flags);
861 zpokel(zatm_dev,zpeekl(zatm_dev,uPD98401_PS(shaper)) & ~uPD98401_PS_E,
862 uPD98401_PS(shaper));
863 spin_unlock_irqrestore(&zatm_dev->lock, flags);
864 zatm_dev->free_shapers |= 1 << shaper;
865}
866
867
868static void close_tx(struct atm_vcc *vcc)
869{
870 struct zatm_dev *zatm_dev;
871 struct zatm_vcc *zatm_vcc;
872 unsigned long flags;
873 int chan;
874
875 zatm_vcc = ZATM_VCC(vcc);
876 zatm_dev = ZATM_DEV(vcc->dev);
877 chan = zatm_vcc->tx_chan;
878 if (!chan) return;
879 DPRINTK("close_tx\n");
880 if (skb_peek(&zatm_vcc->backlog)) {
881 printk("waiting for backlog to drain ...\n");
882 event_dump();
883 wait_event(zatm_vcc->tx_wait, !skb_peek(&zatm_vcc->backlog));
884 }
885 if (skb_peek(&zatm_vcc->tx_queue)) {
886 printk("waiting for TX queue to drain ...\n");
887 event_dump();
888 wait_event(zatm_vcc->tx_wait, !skb_peek(&zatm_vcc->tx_queue));
889 }
890 spin_lock_irqsave(&zatm_dev->lock, flags);
891#if 0
892 zwait;
893 zout(uPD98401_DEACT_CHAN | (chan << uPD98401_CHAN_ADDR_SHIFT),CMR);
894#endif
895 zwait;
896 zout(uPD98401_CLOSE_CHAN | (chan << uPD98401_CHAN_ADDR_SHIFT),CMR);
897 zwait;
898 if (!(zin(CMR) & uPD98401_CHAN_ADDR))
899 printk(KERN_CRIT DEV_LABEL "(itf %d): can't close TX channel "
900 "%d\n",vcc->dev->number,chan);
901 spin_unlock_irqrestore(&zatm_dev->lock, flags);
902 zatm_vcc->tx_chan = 0;
903 zatm_dev->tx_map[chan] = NULL;
904 if (zatm_vcc->shaper != zatm_dev->ubr) {
905 zatm_dev->tx_bw += vcc->qos.txtp.min_pcr;
906 dealloc_shaper(vcc->dev,zatm_vcc->shaper);
907 }
908 kfree(zatm_vcc->ring);
909}
910
911
912static int open_tx_first(struct atm_vcc *vcc)
913{
914 struct zatm_dev *zatm_dev;
915 struct zatm_vcc *zatm_vcc;
916 unsigned long flags;
917 u32 *loop;
918 unsigned short chan;
919 int unlimited;
920
921 DPRINTK("open_tx_first\n");
922 zatm_dev = ZATM_DEV(vcc->dev);
923 zatm_vcc = ZATM_VCC(vcc);
924 zatm_vcc->tx_chan = 0;
925 if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0;
926 spin_lock_irqsave(&zatm_dev->lock, flags);
927 zwait;
928 zout(uPD98401_OPEN_CHAN,CMR);
929 zwait;
930 DPRINTK("0x%x 0x%x\n",zin(CMR),zin(CER));
931 chan = (zin(CMR) & uPD98401_CHAN_ADDR) >> uPD98401_CHAN_ADDR_SHIFT;
932 spin_unlock_irqrestore(&zatm_dev->lock, flags);
933 DPRINTK("chan is %d\n",chan);
934 if (!chan) return -EAGAIN;
935 unlimited = vcc->qos.txtp.traffic_class == ATM_UBR &&
936 (!vcc->qos.txtp.max_pcr || vcc->qos.txtp.max_pcr == ATM_MAX_PCR ||
937 vcc->qos.txtp.max_pcr >= ATM_OC3_PCR);
938 if (unlimited && zatm_dev->ubr != -1) zatm_vcc->shaper = zatm_dev->ubr;
939 else {
940 int uninitialized_var(pcr);
941
942 if (unlimited) vcc->qos.txtp.max_sdu = ATM_MAX_AAL5_PDU;
943 if ((zatm_vcc->shaper = alloc_shaper(vcc->dev,&pcr,
944 vcc->qos.txtp.min_pcr,vcc->qos.txtp.max_pcr,unlimited))
945 < 0) {
946 close_tx(vcc);
947 return zatm_vcc->shaper;
948 }
949 if (pcr > ATM_OC3_PCR) pcr = ATM_OC3_PCR;
950 vcc->qos.txtp.min_pcr = vcc->qos.txtp.max_pcr = pcr;
951 }
952 zatm_vcc->tx_chan = chan;
953 skb_queue_head_init(&zatm_vcc->tx_queue);
954 init_waitqueue_head(&zatm_vcc->tx_wait);
955 /* initialize ring */
956 zatm_vcc->ring = kzalloc(RING_SIZE,GFP_KERNEL);
957 if (!zatm_vcc->ring) return -ENOMEM;
958 loop = zatm_vcc->ring+RING_ENTRIES*RING_WORDS;
959 loop[0] = uPD98401_TXPD_V;
960 loop[1] = loop[2] = 0;
961 loop[3] = virt_to_bus(zatm_vcc->ring);
962 zatm_vcc->ring_curr = 0;
963 zatm_vcc->txing = 0;
964 skb_queue_head_init(&zatm_vcc->backlog);
965 zpokel(zatm_dev,virt_to_bus(zatm_vcc->ring),
966 chan*VC_SIZE/4+uPD98401_TXVC_QRP);
967 return 0;
968}
969
970
971static int open_tx_second(struct atm_vcc *vcc)
972{
973 struct zatm_dev *zatm_dev;
974 struct zatm_vcc *zatm_vcc;
975 unsigned long flags;
976
977 DPRINTK("open_tx_second\n");
978 zatm_dev = ZATM_DEV(vcc->dev);
979 zatm_vcc = ZATM_VCC(vcc);
980 if (!zatm_vcc->tx_chan) return 0;
981 /* set up VC descriptor */
982 spin_lock_irqsave(&zatm_dev->lock, flags);
983 zpokel(zatm_dev,0,zatm_vcc->tx_chan*VC_SIZE/4);
984 zpokel(zatm_dev,uPD98401_TXVC_L | (zatm_vcc->shaper <<
985 uPD98401_TXVC_SHP_SHIFT) | (vcc->vpi << uPD98401_TXVC_VPI_SHIFT) |
986 vcc->vci,zatm_vcc->tx_chan*VC_SIZE/4+1);
987 zpokel(zatm_dev,0,zatm_vcc->tx_chan*VC_SIZE/4+2);
988 spin_unlock_irqrestore(&zatm_dev->lock, flags);
989 zatm_dev->tx_map[zatm_vcc->tx_chan] = vcc;
990 return 0;
991}
992
993
994static int start_tx(struct atm_dev *dev)
995{
996 struct zatm_dev *zatm_dev;
997 int i;
998
999 DPRINTK("start_tx\n");
1000 zatm_dev = ZATM_DEV(dev);
1001 zatm_dev->tx_map = kmalloc(sizeof(struct atm_vcc *)*
1002 zatm_dev->chans,GFP_KERNEL);
1003 if (!zatm_dev->tx_map) return -ENOMEM;
1004 zatm_dev->tx_bw = ATM_OC3_PCR;
1005 zatm_dev->free_shapers = (1 << NR_SHAPERS)-1;
1006 zatm_dev->ubr = -1;
1007 zatm_dev->ubr_ref_cnt = 0;
1008 /* initialize shapers */
1009 for (i = 0; i < NR_SHAPERS; i++) zpokel(zatm_dev,0,uPD98401_PS(i));
1010 return 0;
1011}
1012
1013
1014/*------------------------------- interrupts --------------------------------*/
1015
1016
1017static irqreturn_t zatm_int(int irq,void *dev_id)
1018{
1019 struct atm_dev *dev;
1020 struct zatm_dev *zatm_dev;
1021 u32 reason;
1022 int handled = 0;
1023
1024 dev = dev_id;
1025 zatm_dev = ZATM_DEV(dev);
1026 while ((reason = zin(GSR))) {
1027 handled = 1;
1028 EVENT("reason 0x%x\n",reason,0);
1029 if (reason & uPD98401_INT_PI) {
1030 EVENT("PHY int\n",0,0);
1031 dev->phy->interrupt(dev);
1032 }
1033 if (reason & uPD98401_INT_RQA) {
1034 unsigned long pools;
1035 int i;
1036
1037 pools = zin(RQA);
1038 EVENT("RQA (0x%08x)\n",pools,0);
1039 for (i = 0; pools; i++) {
1040 if (pools & 1) {
1041 refill_pool(dev,i);
1042 zatm_dev->pool_info[i].rqa_count++;
1043 }
1044 pools >>= 1;
1045 }
1046 }
1047 if (reason & uPD98401_INT_RQU) {
1048 unsigned long pools;
1049 int i;
1050 pools = zin(RQU);
1051 printk(KERN_WARNING DEV_LABEL "(itf %d): RQU 0x%08lx\n",
1052 dev->number,pools);
1053 event_dump();
1054 for (i = 0; pools; i++) {
1055 if (pools & 1) {
1056 refill_pool(dev,i);
1057 zatm_dev->pool_info[i].rqu_count++;
1058 }
1059 pools >>= 1;
1060 }
1061 }
1062 /* don't handle RD */
1063 if (reason & uPD98401_INT_SPE)
1064 printk(KERN_ALERT DEV_LABEL "(itf %d): system parity "
1065 "error at 0x%08x\n",dev->number,zin(ADDR));
1066 if (reason & uPD98401_INT_CPE)
1067 printk(KERN_ALERT DEV_LABEL "(itf %d): control memory "
1068 "parity error at 0x%08x\n",dev->number,zin(ADDR));
1069 if (reason & uPD98401_INT_SBE) {
1070 printk(KERN_ALERT DEV_LABEL "(itf %d): system bus "
1071 "error at 0x%08x\n",dev->number,zin(ADDR));
1072 event_dump();
1073 }
1074 /* don't handle IND */
1075 if (reason & uPD98401_INT_MF) {
1076 printk(KERN_CRIT DEV_LABEL "(itf %d): mailbox full "
1077 "(0x%x)\n",dev->number,(reason & uPD98401_INT_MF)
1078 >> uPD98401_INT_MF_SHIFT);
1079 event_dump();
1080 /* @@@ should try to recover */
1081 }
1082 if (reason & uPD98401_INT_MM) {
1083 if (reason & 1) poll_rx(dev,0);
1084 if (reason & 2) poll_rx(dev,1);
1085 if (reason & 4) poll_tx(dev,2);
1086 if (reason & 8) poll_tx(dev,3);
1087 }
1088 /* @@@ handle RCRn */
1089 }
1090 return IRQ_RETVAL(handled);
1091}
1092
1093
1094/*----------------------------- (E)EPROM access -----------------------------*/
1095
1096
1097static void eprom_set(struct zatm_dev *zatm_dev, unsigned long value,
1098 unsigned short cmd)
1099{
1100 int error;
1101
1102 if ((error = pci_write_config_dword(zatm_dev->pci_dev,cmd,value)))
1103 printk(KERN_ERR DEV_LABEL ": PCI write failed (0x%02x)\n",
1104 error);
1105}
1106
1107
1108static unsigned long eprom_get(struct zatm_dev *zatm_dev, unsigned short cmd)
1109{
1110 unsigned int value;
1111 int error;
1112
1113 if ((error = pci_read_config_dword(zatm_dev->pci_dev,cmd,&value)))
1114 printk(KERN_ERR DEV_LABEL ": PCI read failed (0x%02x)\n",
1115 error);
1116 return value;
1117}
1118
1119
1120static void eprom_put_bits(struct zatm_dev *zatm_dev, unsigned long data,
1121 int bits, unsigned short cmd)
1122{
1123 unsigned long value;
1124 int i;
1125
1126 for (i = bits-1; i >= 0; i--) {
1127 value = ZEPROM_CS | (((data >> i) & 1) ? ZEPROM_DI : 0);
1128 eprom_set(zatm_dev,value,cmd);
1129 eprom_set(zatm_dev,value | ZEPROM_SK,cmd);
1130 eprom_set(zatm_dev,value,cmd);
1131 }
1132}
1133
1134
1135static void eprom_get_byte(struct zatm_dev *zatm_dev, unsigned char *byte,
1136 unsigned short cmd)
1137{
1138 int i;
1139
1140 *byte = 0;
1141 for (i = 8; i; i--) {
1142 eprom_set(zatm_dev,ZEPROM_CS,cmd);
1143 eprom_set(zatm_dev,ZEPROM_CS | ZEPROM_SK,cmd);
1144 *byte <<= 1;
1145 if (eprom_get(zatm_dev,cmd) & ZEPROM_DO) *byte |= 1;
1146 eprom_set(zatm_dev,ZEPROM_CS,cmd);
1147 }
1148}
1149
1150
1151static unsigned char eprom_try_esi(struct atm_dev *dev, unsigned short cmd,
1152 int offset, int swap)
1153{
1154 unsigned char buf[ZEPROM_SIZE];
1155 struct zatm_dev *zatm_dev;
1156 int i;
1157
1158 zatm_dev = ZATM_DEV(dev);
1159 for (i = 0; i < ZEPROM_SIZE; i += 2) {
1160 eprom_set(zatm_dev,ZEPROM_CS,cmd); /* select EPROM */
1161 eprom_put_bits(zatm_dev,ZEPROM_CMD_READ,ZEPROM_CMD_LEN,cmd);
1162 eprom_put_bits(zatm_dev,i >> 1,ZEPROM_ADDR_LEN,cmd);
1163 eprom_get_byte(zatm_dev,buf+i+swap,cmd);
1164 eprom_get_byte(zatm_dev,buf+i+1-swap,cmd);
1165 eprom_set(zatm_dev,0,cmd); /* deselect EPROM */
1166 }
1167 memcpy(dev->esi,buf+offset,ESI_LEN);
1168 return memcmp(dev->esi,"\0\0\0\0\0",ESI_LEN); /* assumes ESI_LEN == 6 */
1169}
1170
1171
1172static void eprom_get_esi(struct atm_dev *dev)
1173{
1174 if (eprom_try_esi(dev,ZEPROM_V1_REG,ZEPROM_V1_ESI_OFF,1)) return;
1175 (void) eprom_try_esi(dev,ZEPROM_V2_REG,ZEPROM_V2_ESI_OFF,0);
1176}
1177
1178
1179/*--------------------------------- entries ---------------------------------*/
1180
1181
1182static int zatm_init(struct atm_dev *dev)
1183{
1184 struct zatm_dev *zatm_dev;
1185 struct pci_dev *pci_dev;
1186 unsigned short command;
1187 int error,i,last;
1188 unsigned long t0,t1,t2;
1189
1190 DPRINTK(">zatm_init\n");
1191 zatm_dev = ZATM_DEV(dev);
1192 spin_lock_init(&zatm_dev->lock);
1193 pci_dev = zatm_dev->pci_dev;
1194 zatm_dev->base = pci_resource_start(pci_dev, 0);
1195 zatm_dev->irq = pci_dev->irq;
1196 if ((error = pci_read_config_word(pci_dev,PCI_COMMAND,&command))) {
1197 printk(KERN_ERR DEV_LABEL "(itf %d): init error 0x%02x\n",
1198 dev->number,error);
1199 return -EINVAL;
1200 }
1201 if ((error = pci_write_config_word(pci_dev,PCI_COMMAND,
1202 command | PCI_COMMAND_IO | PCI_COMMAND_MASTER))) {
1203 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable IO (0x%02x)"
1204 "\n",dev->number,error);
1205 return -EIO;
1206 }
1207 eprom_get_esi(dev);
1208 printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%x,irq=%d,",
1209 dev->number,pci_dev->revision,zatm_dev->base,zatm_dev->irq);
1210 /* reset uPD98401 */
1211 zout(0,SWR);
1212 while (!(zin(GSR) & uPD98401_INT_IND));
1213 zout(uPD98401_GMR_ONE /*uPD98401_BURST4*/,GMR);
1214 last = MAX_CRAM_SIZE;
1215 for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) {
1216 zpokel(zatm_dev,0x55555555,i);
1217 if (zpeekl(zatm_dev,i) != 0x55555555) last = i;
1218 else {
1219 zpokel(zatm_dev,0xAAAAAAAA,i);
1220 if (zpeekl(zatm_dev,i) != 0xAAAAAAAA) last = i;
1221 else zpokel(zatm_dev,i,i);
1222 }
1223 }
1224 for (i = 0; i < last; i += RAM_INCREMENT)
1225 if (zpeekl(zatm_dev,i) != i) break;
1226 zatm_dev->mem = i << 2;
1227 while (i) zpokel(zatm_dev,0,--i);
1228 /* reset again to rebuild memory pointers */
1229 zout(0,SWR);
1230 while (!(zin(GSR) & uPD98401_INT_IND));
1231 zout(uPD98401_GMR_ONE | uPD98401_BURST8 | uPD98401_BURST4 |
1232 uPD98401_BURST2 | uPD98401_GMR_PM | uPD98401_GMR_DR,GMR);
1233 /* TODO: should shrink allocation now */
1234 printk("mem=%dkB,%s (",zatm_dev->mem >> 10,zatm_dev->copper ? "UTP" :
1235 "MMF");
1236 for (i = 0; i < ESI_LEN; i++)
1237 printk("%02X%s",dev->esi[i],i == ESI_LEN-1 ? ")\n" : "-");
1238 do {
1239 unsigned long flags;
1240
1241 spin_lock_irqsave(&zatm_dev->lock, flags);
1242 t0 = zpeekl(zatm_dev,uPD98401_TSR);
1243 udelay(10);
1244 t1 = zpeekl(zatm_dev,uPD98401_TSR);
1245 udelay(1010);
1246 t2 = zpeekl(zatm_dev,uPD98401_TSR);
1247 spin_unlock_irqrestore(&zatm_dev->lock, flags);
1248 }
1249 while (t0 > t1 || t1 > t2); /* loop if wrapping ... */
1250 zatm_dev->khz = t2-2*t1+t0;
1251 printk(KERN_NOTICE DEV_LABEL "(itf %d): uPD98401 %d.%d at %d.%03d "
1252 "MHz\n",dev->number,
1253 (zin(VER) & uPD98401_MAJOR) >> uPD98401_MAJOR_SHIFT,
1254 zin(VER) & uPD98401_MINOR,zatm_dev->khz/1000,zatm_dev->khz % 1000);
1255 return uPD98402_init(dev);
1256}
1257
1258
1259static int zatm_start(struct atm_dev *dev)
1260{
1261 struct zatm_dev *zatm_dev = ZATM_DEV(dev);
1262 struct pci_dev *pdev = zatm_dev->pci_dev;
1263 unsigned long curr;
1264 int pools,vccs,rx;
1265 int error, i, ld;
1266
1267 DPRINTK("zatm_start\n");
1268 zatm_dev->rx_map = zatm_dev->tx_map = NULL;
1269 for (i = 0; i < NR_MBX; i++)
1270 zatm_dev->mbx_start[i] = 0;
1271 error = request_irq(zatm_dev->irq, zatm_int, IRQF_SHARED, DEV_LABEL, dev);
1272 if (error < 0) {
1273 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
1274 dev->number,zatm_dev->irq);
1275 goto done;
1276 }
1277 /* define memory regions */
1278 pools = NR_POOLS;
1279 if (NR_SHAPERS*SHAPER_SIZE > pools*POOL_SIZE)
1280 pools = NR_SHAPERS*SHAPER_SIZE/POOL_SIZE;
1281 vccs = (zatm_dev->mem-NR_SHAPERS*SHAPER_SIZE-pools*POOL_SIZE)/
1282 (2*VC_SIZE+RX_SIZE);
1283 ld = -1;
1284 for (rx = 1; rx < vccs; rx <<= 1) ld++;
1285 dev->ci_range.vpi_bits = 0; /* @@@ no VPI for now */
1286 dev->ci_range.vci_bits = ld;
1287 dev->link_rate = ATM_OC3_PCR;
1288 zatm_dev->chans = vccs; /* ??? */
1289 curr = rx*RX_SIZE/4;
1290 DPRINTK("RX pool 0x%08lx\n",curr);
1291 zpokel(zatm_dev,curr,uPD98401_PMA); /* receive pool */
1292 zatm_dev->pool_base = curr;
1293 curr += pools*POOL_SIZE/4;
1294 DPRINTK("Shapers 0x%08lx\n",curr);
1295 zpokel(zatm_dev,curr,uPD98401_SMA); /* shapers */
1296 curr += NR_SHAPERS*SHAPER_SIZE/4;
1297 DPRINTK("Free 0x%08lx\n",curr);
1298 zpokel(zatm_dev,curr,uPD98401_TOS); /* free pool */
1299 printk(KERN_INFO DEV_LABEL "(itf %d): %d shapers, %d pools, %d RX, "
1300 "%ld VCs\n",dev->number,NR_SHAPERS,pools,rx,
1301 (zatm_dev->mem-curr*4)/VC_SIZE);
1302 /* create mailboxes */
1303 for (i = 0; i < NR_MBX; i++) {
1304 void *mbx;
1305 dma_addr_t mbx_dma;
1306
1307 if (!mbx_entries[i])
1308 continue;
1309 mbx = dma_alloc_coherent(&pdev->dev,
1310 2 * MBX_SIZE(i), &mbx_dma, GFP_KERNEL);
1311 if (!mbx) {
1312 error = -ENOMEM;
1313 goto out;
1314 }
1315 /*
1316 * Alignment provided by dma_alloc_coherent() isn't enough
1317 * for this device.
1318 */
1319 if (((unsigned long)mbx ^ mbx_dma) & 0xffff) {
1320 printk(KERN_ERR DEV_LABEL "(itf %d): system "
1321 "bus incompatible with driver\n", dev->number);
1322 dma_free_coherent(&pdev->dev, 2*MBX_SIZE(i), mbx, mbx_dma);
1323 error = -ENODEV;
1324 goto out;
1325 }
1326 DPRINTK("mbx@0x%08lx-0x%08lx\n", mbx, mbx + MBX_SIZE(i));
1327 zatm_dev->mbx_start[i] = (unsigned long)mbx;
1328 zatm_dev->mbx_dma[i] = mbx_dma;
1329 zatm_dev->mbx_end[i] = (zatm_dev->mbx_start[i] + MBX_SIZE(i)) &
1330 0xffff;
1331 zout(mbx_dma >> 16, MSH(i));
1332 zout(mbx_dma, MSL(i));
1333 zout(zatm_dev->mbx_end[i], MBA(i));
1334 zout((unsigned long)mbx & 0xffff, MTA(i));
1335 zout((unsigned long)mbx & 0xffff, MWA(i));
1336 }
1337 error = start_tx(dev);
1338 if (error)
1339 goto out;
1340 error = start_rx(dev);
1341 if (error)
1342 goto out_tx;
1343 error = dev->phy->start(dev);
1344 if (error)
1345 goto out_rx;
1346 zout(0xffffffff,IMR); /* enable interrupts */
1347 /* enable TX & RX */
1348 zout(zin(GMR) | uPD98401_GMR_SE | uPD98401_GMR_RE,GMR);
1349done:
1350 return error;
1351
1352out_rx:
1353 kfree(zatm_dev->rx_map);
1354out_tx:
1355 kfree(zatm_dev->tx_map);
1356out:
1357 while (i-- > 0) {
1358 dma_free_coherent(&pdev->dev, 2 * MBX_SIZE(i),
1359 (void *)zatm_dev->mbx_start[i],
1360 zatm_dev->mbx_dma[i]);
1361 }
1362 free_irq(zatm_dev->irq, dev);
1363 goto done;
1364}
1365
1366
1367static void zatm_close(struct atm_vcc *vcc)
1368{
1369 DPRINTK(">zatm_close\n");
1370 if (!ZATM_VCC(vcc)) return;
1371 clear_bit(ATM_VF_READY,&vcc->flags);
1372 close_rx(vcc);
1373 EVENT("close_tx\n",0,0);
1374 close_tx(vcc);
1375 DPRINTK("zatm_close: done waiting\n");
1376 /* deallocate memory */
1377 kfree(ZATM_VCC(vcc));
1378 vcc->dev_data = NULL;
1379 clear_bit(ATM_VF_ADDR,&vcc->flags);
1380}
1381
1382
1383static int zatm_open(struct atm_vcc *vcc)
1384{
1385 struct zatm_dev *zatm_dev;
1386 struct zatm_vcc *zatm_vcc;
1387 short vpi = vcc->vpi;
1388 int vci = vcc->vci;
1389 int error;
1390
1391 DPRINTK(">zatm_open\n");
1392 zatm_dev = ZATM_DEV(vcc->dev);
1393 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1394 vcc->dev_data = NULL;
1395 if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
1396 set_bit(ATM_VF_ADDR,&vcc->flags);
1397 if (vcc->qos.aal != ATM_AAL5) return -EINVAL; /* @@@ AAL0 */
1398 DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi,
1399 vcc->vci);
1400 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
1401 zatm_vcc = kmalloc(sizeof(struct zatm_vcc),GFP_KERNEL);
1402 if (!zatm_vcc) {
1403 clear_bit(ATM_VF_ADDR,&vcc->flags);
1404 return -ENOMEM;
1405 }
1406 vcc->dev_data = zatm_vcc;
1407 ZATM_VCC(vcc)->tx_chan = 0; /* for zatm_close after open_rx */
1408 if ((error = open_rx_first(vcc))) {
1409 zatm_close(vcc);
1410 return error;
1411 }
1412 if ((error = open_tx_first(vcc))) {
1413 zatm_close(vcc);
1414 return error;
1415 }
1416 }
1417 if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0;
1418 if ((error = open_rx_second(vcc))) {
1419 zatm_close(vcc);
1420 return error;
1421 }
1422 if ((error = open_tx_second(vcc))) {
1423 zatm_close(vcc);
1424 return error;
1425 }
1426 set_bit(ATM_VF_READY,&vcc->flags);
1427 return 0;
1428}
1429
1430
1431static int zatm_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flags)
1432{
1433 printk("Not yet implemented\n");
1434 return -ENOSYS;
1435 /* @@@ */
1436}
1437
1438
1439static int zatm_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
1440{
1441 struct zatm_dev *zatm_dev;
1442 unsigned long flags;
1443
1444 zatm_dev = ZATM_DEV(dev);
1445 switch (cmd) {
1446 case ZATM_GETPOOLZ:
1447 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1448 /* fall through */
1449 case ZATM_GETPOOL:
1450 {
1451 struct zatm_pool_info info;
1452 int pool;
1453
1454 if (get_user(pool,
1455 &((struct zatm_pool_req __user *) arg)->pool_num))
1456 return -EFAULT;
1457 if (pool < 0 || pool > ZATM_LAST_POOL)
1458 return -EINVAL;
1459 spin_lock_irqsave(&zatm_dev->lock, flags);
1460 info = zatm_dev->pool_info[pool];
1461 if (cmd == ZATM_GETPOOLZ) {
1462 zatm_dev->pool_info[pool].rqa_count = 0;
1463 zatm_dev->pool_info[pool].rqu_count = 0;
1464 }
1465 spin_unlock_irqrestore(&zatm_dev->lock, flags);
1466 return copy_to_user(
1467 &((struct zatm_pool_req __user *) arg)->info,
1468 &info,sizeof(info)) ? -EFAULT : 0;
1469 }
1470 case ZATM_SETPOOL:
1471 {
1472 struct zatm_pool_info info;
1473 int pool;
1474
1475 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1476 if (get_user(pool,
1477 &((struct zatm_pool_req __user *) arg)->pool_num))
1478 return -EFAULT;
1479 if (pool < 0 || pool > ZATM_LAST_POOL)
1480 return -EINVAL;
1481 if (copy_from_user(&info,
1482 &((struct zatm_pool_req __user *) arg)->info,
1483 sizeof(info))) return -EFAULT;
1484 if (!info.low_water)
1485 info.low_water = zatm_dev->
1486 pool_info[pool].low_water;
1487 if (!info.high_water)
1488 info.high_water = zatm_dev->
1489 pool_info[pool].high_water;
1490 if (!info.next_thres)
1491 info.next_thres = zatm_dev->
1492 pool_info[pool].next_thres;
1493 if (info.low_water >= info.high_water ||
1494 info.low_water < 0)
1495 return -EINVAL;
1496 spin_lock_irqsave(&zatm_dev->lock, flags);
1497 zatm_dev->pool_info[pool].low_water =
1498 info.low_water;
1499 zatm_dev->pool_info[pool].high_water =
1500 info.high_water;
1501 zatm_dev->pool_info[pool].next_thres =
1502 info.next_thres;
1503 spin_unlock_irqrestore(&zatm_dev->lock, flags);
1504 return 0;
1505 }
1506 default:
1507 if (!dev->phy->ioctl) return -ENOIOCTLCMD;
1508 return dev->phy->ioctl(dev,cmd,arg);
1509 }
1510}
1511
1512
1513static int zatm_getsockopt(struct atm_vcc *vcc,int level,int optname,
1514 void __user *optval,int optlen)
1515{
1516 return -EINVAL;
1517}
1518
1519
1520static int zatm_setsockopt(struct atm_vcc *vcc,int level,int optname,
1521 void __user *optval,unsigned int optlen)
1522{
1523 return -EINVAL;
1524}
1525
1526static int zatm_send(struct atm_vcc *vcc,struct sk_buff *skb)
1527{
1528 int error;
1529
1530 EVENT(">zatm_send 0x%lx\n",(unsigned long) skb,0);
1531 if (!ZATM_VCC(vcc)->tx_chan || !test_bit(ATM_VF_READY,&vcc->flags)) {
1532 if (vcc->pop) vcc->pop(vcc,skb);
1533 else dev_kfree_skb(skb);
1534 return -EINVAL;
1535 }
1536 if (!skb) {
1537 printk(KERN_CRIT "!skb in zatm_send ?\n");
1538 if (vcc->pop) vcc->pop(vcc,skb);
1539 return -EINVAL;
1540 }
1541 ATM_SKB(skb)->vcc = vcc;
1542 error = do_tx(skb);
1543 if (error != RING_BUSY) return error;
1544 skb_queue_tail(&ZATM_VCC(vcc)->backlog,skb);
1545 return 0;
1546}
1547
1548
1549static void zatm_phy_put(struct atm_dev *dev,unsigned char value,
1550 unsigned long addr)
1551{
1552 struct zatm_dev *zatm_dev;
1553
1554 zatm_dev = ZATM_DEV(dev);
1555 zwait;
1556 zout(value,CER);
1557 zout(uPD98401_IND_ACC | uPD98401_IA_B0 |
1558 (uPD98401_IA_TGT_PHY << uPD98401_IA_TGT_SHIFT) | addr,CMR);
1559}
1560
1561
1562static unsigned char zatm_phy_get(struct atm_dev *dev,unsigned long addr)
1563{
1564 struct zatm_dev *zatm_dev;
1565
1566 zatm_dev = ZATM_DEV(dev);
1567 zwait;
1568 zout(uPD98401_IND_ACC | uPD98401_IA_B0 | uPD98401_IA_RW |
1569 (uPD98401_IA_TGT_PHY << uPD98401_IA_TGT_SHIFT) | addr,CMR);
1570 zwait;
1571 return zin(CER) & 0xff;
1572}
1573
1574
1575static const struct atmdev_ops ops = {
1576 .open = zatm_open,
1577 .close = zatm_close,
1578 .ioctl = zatm_ioctl,
1579 .getsockopt = zatm_getsockopt,
1580 .setsockopt = zatm_setsockopt,
1581 .send = zatm_send,
1582 .phy_put = zatm_phy_put,
1583 .phy_get = zatm_phy_get,
1584 .change_qos = zatm_change_qos,
1585};
1586
1587static int zatm_init_one(struct pci_dev *pci_dev,
1588 const struct pci_device_id *ent)
1589{
1590 struct atm_dev *dev;
1591 struct zatm_dev *zatm_dev;
1592 int ret = -ENOMEM;
1593
1594 zatm_dev = kmalloc(sizeof(*zatm_dev), GFP_KERNEL);
1595 if (!zatm_dev) {
1596 printk(KERN_EMERG "%s: memory shortage\n", DEV_LABEL);
1597 goto out;
1598 }
1599
1600 dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL);
1601 if (!dev)
1602 goto out_free;
1603
1604 ret = pci_enable_device(pci_dev);
1605 if (ret < 0)
1606 goto out_deregister;
1607
1608 ret = pci_request_regions(pci_dev, DEV_LABEL);
1609 if (ret < 0)
1610 goto out_disable;
1611
1612 ret = dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(32));
1613 if (ret < 0)
1614 goto out_disable;
1615
1616 zatm_dev->pci_dev = pci_dev;
1617 dev->dev_data = zatm_dev;
1618 zatm_dev->copper = (int)ent->driver_data;
1619 if ((ret = zatm_init(dev)) || (ret = zatm_start(dev)))
1620 goto out_release;
1621
1622 pci_set_drvdata(pci_dev, dev);
1623 zatm_dev->more = zatm_boards;
1624 zatm_boards = dev;
1625 ret = 0;
1626out:
1627 return ret;
1628
1629out_release:
1630 pci_release_regions(pci_dev);
1631out_disable:
1632 pci_disable_device(pci_dev);
1633out_deregister:
1634 atm_dev_deregister(dev);
1635out_free:
1636 kfree(zatm_dev);
1637 goto out;
1638}
1639
1640
1641MODULE_LICENSE("GPL");
1642
1643static struct pci_device_id zatm_pci_tbl[] = {
1644 { PCI_VDEVICE(ZEITNET, PCI_DEVICE_ID_ZEITNET_1221), ZATM_COPPER },
1645 { PCI_VDEVICE(ZEITNET, PCI_DEVICE_ID_ZEITNET_1225), 0 },
1646 { 0, }
1647};
1648MODULE_DEVICE_TABLE(pci, zatm_pci_tbl);
1649
1650static struct pci_driver zatm_driver = {
1651 .name = DEV_LABEL,
1652 .id_table = zatm_pci_tbl,
1653 .probe = zatm_init_one,
1654};
1655
1656static int __init zatm_init_module(void)
1657{
1658 return pci_register_driver(&zatm_driver);
1659}
1660
1661module_init(zatm_init_module);
1662/* module_exit not defined so not unloadable */