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[/] [test_project/] [trunk/] [linux_sd_driver/] [drivers/] [atm/] [eni.c] - Blame information for rev 65

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Line No. Rev Author Line
1 62 marcus.erl
/* drivers/atm/eni.c - Efficient Networks ENI155P device driver */
2
 
3
/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
4
 
5
 
6
#include <linux/module.h>
7
#include <linux/kernel.h>
8
#include <linux/mm.h>
9
#include <linux/pci.h>
10
#include <linux/errno.h>
11
#include <linux/atm.h>
12
#include <linux/atmdev.h>
13
#include <linux/sonet.h>
14
#include <linux/skbuff.h>
15
#include <linux/time.h>
16
#include <linux/delay.h>
17
#include <linux/uio.h>
18
#include <linux/init.h>
19
#include <linux/atm_eni.h>
20
#include <linux/bitops.h>
21
#include <asm/system.h>
22
#include <asm/io.h>
23
#include <asm/atomic.h>
24
#include <asm/uaccess.h>
25
#include <asm/string.h>
26
#include <asm/byteorder.h>
27
 
28
#include "tonga.h"
29
#include "midway.h"
30
#include "suni.h"
31
#include "eni.h"
32
 
33
#if !defined(__i386__) && !defined(__x86_64__)
34
#ifndef ioremap_nocache
35
#define ioremap_nocache(X,Y) ioremap(X,Y)
36
#endif 
37
#endif
38
 
39
/*
40
 * TODO:
41
 *
42
 * Show stoppers
43
 *  none
44
 *
45
 * Minor
46
 *  - OAM support
47
 *  - fix bugs listed below
48
 */
49
 
50
/*
51
 * KNOWN BUGS:
52
 *
53
 * - may run into JK-JK bug and deadlock
54
 * - should allocate UBR channel first
55
 * - buffer space allocation algorithm is stupid
56
 *   (RX: should be maxSDU+maxdelay*rate
57
 *    TX: should be maxSDU+min(maxSDU,maxdelay*rate) )
58
 * - doesn't support OAM cells
59
 * - eni_put_free may hang if not putting memory fragments that _complete_
60
 *   2^n block (never happens in real life, though)
61
 */
62
 
63
 
64
#if 0
65
#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
66
#else
67
#define DPRINTK(format,args...)
68
#endif
69
 
70
 
71
#ifndef CONFIG_ATM_ENI_TUNE_BURST
72
#define CONFIG_ATM_ENI_BURST_TX_8W
73
#define CONFIG_ATM_ENI_BURST_RX_4W
74
#endif
75
 
76
 
77
#ifndef CONFIG_ATM_ENI_DEBUG
78
 
79
 
80
#define NULLCHECK(x)
81
 
82
#define EVENT(s,a,b)
83
 
84
 
85
static void event_dump(void)
86
{
87
}
88
 
89
 
90
#else
91
 
92
 
93
/*
94
 * NULL pointer checking
95
 */
96
 
97
#define NULLCHECK(x) \
98
        if ((unsigned long) (x) < 0x30) \
99
                printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x))
100
 
101
/*
102
 * Very extensive activity logging. Greatly improves bug detection speed but
103
 * costs a few Mbps if enabled.
104
 */
105
 
106
#define EV 64
107
 
108
static const char *ev[EV];
109
static unsigned long ev_a[EV],ev_b[EV];
110
static int ec = 0;
111
 
112
 
113
static void EVENT(const char *s,unsigned long a,unsigned long b)
114
{
115
        ev[ec] = s;
116
        ev_a[ec] = a;
117
        ev_b[ec] = b;
118
        ec = (ec+1) % EV;
119
}
120
 
121
 
122
static void event_dump(void)
123
{
124
        int n,i;
125
 
126
        for (n = 0; n < EV; n++) {
127
                i = (ec+n) % EV;
128
                printk(KERN_NOTICE);
129
                printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]);
130
        }
131
}
132
 
133
 
134
#endif /* CONFIG_ATM_ENI_DEBUG */
135
 
136
 
137
/*
138
 * NExx   must not be equal at end
139
 * EExx   may be equal at end
140
 * xxPJOK verify validity of pointer jumps
141
 * xxPMOK operating on a circular buffer of "c" words
142
 */
143
 
144
#define NEPJOK(a0,a1,b) \
145
    ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1))
146
#define EEPJOK(a0,a1,b) \
147
    ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1))
148
#define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b)
149
#define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b)
150
 
151
 
152
static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0,
153
  backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0,
154
  putting = 0;
155
 
156
static struct atm_dev *eni_boards = NULL;
157
 
158
static u32 *cpu_zeroes = NULL; /* aligned "magic" zeroes */
159
static dma_addr_t zeroes;
160
 
161
/* Read/write registers on card */
162
#define eni_in(r)       readl(eni_dev->reg+(r)*4)
163
#define eni_out(v,r)    writel((v),eni_dev->reg+(r)*4)
164
 
165
 
166
/*-------------------------------- utilities --------------------------------*/
167
 
168
 
169
static void dump_mem(struct eni_dev *eni_dev)
170
{
171
        int i;
172
 
173
        for (i = 0; i < eni_dev->free_len; i++)
174
                printk(KERN_DEBUG "  %d: %p %d\n",i,
175
                    eni_dev->free_list[i].start,
176
                    1 << eni_dev->free_list[i].order);
177
}
178
 
179
 
180
static void dump(struct atm_dev *dev)
181
{
182
        struct eni_dev *eni_dev;
183
 
184
        int i;
185
 
186
        eni_dev = ENI_DEV(dev);
187
        printk(KERN_NOTICE "Free memory\n");
188
        dump_mem(eni_dev);
189
        printk(KERN_NOTICE "TX buffers\n");
190
        for (i = 0; i < NR_CHAN; i++)
191
                if (eni_dev->tx[i].send)
192
                        printk(KERN_NOTICE "  TX %d @ %p: %ld\n",i,
193
                            eni_dev->tx[i].send,eni_dev->tx[i].words*4);
194
        printk(KERN_NOTICE "RX buffers\n");
195
        for (i = 0; i < 1024; i++)
196
                if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx)
197
                        printk(KERN_NOTICE "  RX %d @ %p: %ld\n",i,
198
                            ENI_VCC(eni_dev->rx_map[i])->recv,
199
                            ENI_VCC(eni_dev->rx_map[i])->words*4);
200
        printk(KERN_NOTICE "----\n");
201
}
202
 
203
 
204
static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start,
205
    unsigned long size)
206
{
207
        struct eni_free *list;
208
        int len,order;
209
 
210
        DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size);
211
        start += eni_dev->base_diff;
212
        list = eni_dev->free_list;
213
        len = eni_dev->free_len;
214
        while (size) {
215
                if (len >= eni_dev->free_list_size) {
216
                        printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n",
217
                            start,size);
218
                        break;
219
                }
220
                for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++);
221
                if (MID_MIN_BUF_SIZE > (1 << order)) {
222
                        printk(KERN_CRIT "eni_put_free: order %d too small\n",
223
                            order);
224
                        break;
225
                }
226
                list[len].start = (void __iomem *) start;
227
                list[len].order = order;
228
                len++;
229
                start += 1 << order;
230
                size -= 1 << order;
231
        }
232
        eni_dev->free_len = len;
233
        /*dump_mem(eni_dev);*/
234
}
235
 
236
 
237
static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size)
238
{
239
        struct eni_free *list;
240
        void __iomem *start;
241
        int len,i,order,best_order,index;
242
 
243
        list = eni_dev->free_list;
244
        len = eni_dev->free_len;
245
        if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE;
246
        if (*size > MID_MAX_BUF_SIZE) return NULL;
247
        for (order = 0; (1 << order) < *size; order++);
248
        DPRINTK("trying: %ld->%d\n",*size,order);
249
        best_order = 65; /* we don't have more than 2^64 of anything ... */
250
        index = 0; /* silence GCC */
251
        for (i = 0; i < len; i++)
252
                if (list[i].order == order) {
253
                        best_order = order;
254
                        index = i;
255
                        break;
256
                }
257
                else if (best_order > list[i].order && list[i].order > order) {
258
                                best_order = list[i].order;
259
                                index = i;
260
                        }
261
        if (best_order == 65) return NULL;
262
        start = list[index].start-eni_dev->base_diff;
263
        list[index] = list[--len];
264
        eni_dev->free_len = len;
265
        *size = 1 << order;
266
        eni_put_free(eni_dev,start+*size,(1 << best_order)-*size);
267
        DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start);
268
        memset_io(start,0,*size);       /* never leak data */
269
        /*dump_mem(eni_dev);*/
270
        return start;
271
}
272
 
273
 
274
static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start,
275
    unsigned long size)
276
{
277
        struct eni_free *list;
278
        int len,i,order;
279
 
280
        start += eni_dev->base_diff;
281
        list = eni_dev->free_list;
282
        len = eni_dev->free_len;
283
        for (order = -1; size; order++) size >>= 1;
284
        DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order);
285
        for (i = 0; i < len; i++)
286
                if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) &&
287
                    list[i].order == order) {
288
                        DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i,
289
                            list[i].start,start,1 << order,list[i].order,order);
290
                        list[i] = list[--len];
291
                        start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order));
292
                        order++;
293
                        i = -1;
294
                        continue;
295
                }
296
        if (len >= eni_dev->free_list_size) {
297
                printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start,
298
                    order);
299
                return;
300
        }
301
        list[len].start = start;
302
        list[len].order = order;
303
        eni_dev->free_len = len+1;
304
        /*dump_mem(eni_dev);*/
305
}
306
 
307
 
308
/*----------------------------------- RX ------------------------------------*/
309
 
310
 
311
#define ENI_VCC_NOS ((struct atm_vcc *) 1)
312
 
313
 
314
static void rx_ident_err(struct atm_vcc *vcc)
315
{
316
        struct atm_dev *dev;
317
        struct eni_dev *eni_dev;
318
        struct eni_vcc *eni_vcc;
319
 
320
        dev = vcc->dev;
321
        eni_dev = ENI_DEV(dev);
322
        /* immediately halt adapter */
323
        eni_out(eni_in(MID_MC_S) &
324
            ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S);
325
        /* dump useful information */
326
        eni_vcc = ENI_VCC(vcc);
327
        printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident "
328
            "mismatch\n",dev->number);
329
        printk(KERN_ALERT "  VCI %d, rxing %d, words %ld\n",vcc->vci,
330
            eni_vcc->rxing,eni_vcc->words);
331
        printk(KERN_ALERT "  host descr 0x%lx, rx pos 0x%lx, descr value "
332
            "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos,
333
            (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4));
334
        printk(KERN_ALERT "  last %p, servicing %d\n",eni_vcc->last,
335
            eni_vcc->servicing);
336
        EVENT("---dump ends here---\n",0,0);
337
        printk(KERN_NOTICE "---recent events---\n");
338
        event_dump();
339
        ENI_DEV(dev)->fast = NULL; /* really stop it */
340
        ENI_DEV(dev)->slow = NULL;
341
        skb_queue_head_init(&ENI_DEV(dev)->rx_queue);
342
}
343
 
344
 
345
static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb,
346
    unsigned long skip,unsigned long size,unsigned long eff)
347
{
348
        struct eni_dev *eni_dev;
349
        struct eni_vcc *eni_vcc;
350
        u32 dma_rd,dma_wr;
351
        u32 dma[RX_DMA_BUF*2];
352
        dma_addr_t paddr;
353
        unsigned long here;
354
        int i,j;
355
 
356
        eni_dev = ENI_DEV(vcc->dev);
357
        eni_vcc = ENI_VCC(vcc);
358
        paddr = 0; /* GCC, shut up */
359
        if (skb) {
360
                paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len,
361
                    PCI_DMA_FROMDEVICE);
362
                ENI_PRV_PADDR(skb) = paddr;
363
                if (paddr & 3)
364
                        printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has "
365
                            "mis-aligned RX data (0x%lx)\n",vcc->dev->number,
366
                            vcc->vci,(unsigned long) paddr);
367
                ENI_PRV_SIZE(skb) = size+skip;
368
                    /* PDU plus descriptor */
369
                ATM_SKB(skb)->vcc = vcc;
370
        }
371
        j = 0;
372
        if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */
373
                here = (eni_vcc->descr+skip) & (eni_vcc->words-1);
374
                dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci
375
                    << MID_DMA_VCI_SHIFT) | MID_DT_JK;
376
                j++;
377
        }
378
        here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1);
379
        if (!eff) size += skip;
380
        else {
381
                unsigned long words;
382
 
383
                if (!size) {
384
                        DPRINTK("strange things happen ...\n");
385
                        EVENT("strange things happen ... (skip=%ld,eff=%ld)\n",
386
                            size,eff);
387
                }
388
                words = eff;
389
                if (paddr & 15) {
390
                        unsigned long init;
391
 
392
                        init = 4-((paddr & 15) >> 2);
393
                        if (init > words) init = words;
394
                        dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
395
                            (vcc->vci << MID_DMA_VCI_SHIFT);
396
                        dma[j++] = paddr;
397
                        paddr += init << 2;
398
                        words -= init;
399
                }
400
#ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */
401
                if (words & ~15) {
402
                        dma[j++] = MID_DT_16W | ((words >> 4) <<
403
                            MID_DMA_COUNT_SHIFT) | (vcc->vci <<
404
                            MID_DMA_VCI_SHIFT);
405
                        dma[j++] = paddr;
406
                        paddr += (words & ~15) << 2;
407
                        words &= 15;
408
                }
409
#endif
410
#ifdef CONFIG_ATM_ENI_BURST_RX_8W  /* works only with *some* PCI chipsets ... */
411
                if (words & ~7) {
412
                        dma[j++] = MID_DT_8W | ((words >> 3) <<
413
                            MID_DMA_COUNT_SHIFT) | (vcc->vci <<
414
                            MID_DMA_VCI_SHIFT);
415
                        dma[j++] = paddr;
416
                        paddr += (words & ~7) << 2;
417
                        words &= 7;
418
                }
419
#endif
420
#ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */
421
                if (words & ~3) {
422
                        dma[j++] = MID_DT_4W | ((words >> 2) <<
423
                            MID_DMA_COUNT_SHIFT) | (vcc->vci <<
424
                            MID_DMA_VCI_SHIFT);
425
                        dma[j++] = paddr;
426
                        paddr += (words & ~3) << 2;
427
                        words &= 3;
428
                }
429
#endif
430
#ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */
431
                if (words & ~1) {
432
                        dma[j++] = MID_DT_2W | ((words >> 1) <<
433
                            MID_DMA_COUNT_SHIFT) | (vcc->vci <<
434
                            MID_DMA_VCI_SHIFT);
435
                        dma[j++] = paddr;
436
                        paddr += (words & ~1) << 2;
437
                        words &= 1;
438
                }
439
#endif
440
                if (words) {
441
                        dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT)
442
                            | (vcc->vci << MID_DMA_VCI_SHIFT);
443
                        dma[j++] = paddr;
444
                }
445
        }
446
        if (size != eff) {
447
                dma[j++] = (here << MID_DMA_COUNT_SHIFT) |
448
                    (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK;
449
                j++;
450
        }
451
        if (!j || j > 2*RX_DMA_BUF) {
452
                printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n");
453
                goto trouble;
454
        }
455
        dma[j-2] |= MID_DMA_END;
456
        j = j >> 1;
457
        dma_wr = eni_in(MID_DMA_WR_RX);
458
        dma_rd = eni_in(MID_DMA_RD_RX);
459
        /*
460
         * Can I move the dma_wr pointer by 2j+1 positions without overwriting
461
         * data that hasn't been read (position of dma_rd) yet ?
462
         */
463
        if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */
464
                printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n",
465
                    vcc->dev->number);
466
                goto trouble;
467
        }
468
        for (i = 0; i < j; i++) {
469
                writel(dma[i*2],eni_dev->rx_dma+dma_wr*8);
470
                writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4);
471
                dma_wr = (dma_wr+1) & (NR_DMA_RX-1);
472
        }
473
        if (skb) {
474
                ENI_PRV_POS(skb) = eni_vcc->descr+size+1;
475
                skb_queue_tail(&eni_dev->rx_queue,skb);
476
                eni_vcc->last = skb;
477
rx_enqueued++;
478
        }
479
        eni_vcc->descr = here;
480
        eni_out(dma_wr,MID_DMA_WR_RX);
481
        return 0;
482
 
483
trouble:
484
        if (paddr)
485
                pci_unmap_single(eni_dev->pci_dev,paddr,skb->len,
486
                    PCI_DMA_FROMDEVICE);
487
        if (skb) dev_kfree_skb_irq(skb);
488
        return -1;
489
}
490
 
491
 
492
static void discard(struct atm_vcc *vcc,unsigned long size)
493
{
494
        struct eni_vcc *eni_vcc;
495
 
496
        eni_vcc = ENI_VCC(vcc);
497
        EVENT("discard (size=%ld)\n",size,0);
498
        while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0);
499
            /* could do a full fallback, but that might be more expensive */
500
        if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1;
501
        else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1);
502
}
503
 
504
 
505
/*
506
 * TODO: should check whether direct copies (without DMA setup, dequeuing on
507
 * interrupt, etc.) aren't much faster for AAL0
508
 */
509
 
510
static int rx_aal0(struct atm_vcc *vcc)
511
{
512
        struct eni_vcc *eni_vcc;
513
        unsigned long descr;
514
        unsigned long length;
515
        struct sk_buff *skb;
516
 
517
        DPRINTK(">rx_aal0\n");
518
        eni_vcc = ENI_VCC(vcc);
519
        descr = readl(eni_vcc->recv+eni_vcc->descr*4);
520
        if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
521
                rx_ident_err(vcc);
522
                return 1;
523
        }
524
        if (descr & MID_RED_T) {
525
                DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
526
                    vcc->dev->number);
527
                length = 0;
528
                atomic_inc(&vcc->stats->rx_err);
529
        }
530
        else {
531
                length = ATM_CELL_SIZE-1; /* no HEC */
532
        }
533
        skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL;
534
        if (!skb) {
535
                discard(vcc,length >> 2);
536
                return 0;
537
        }
538
        skb_put(skb,length);
539
        skb->tstamp = eni_vcc->timestamp;
540
        DPRINTK("got len %ld\n",length);
541
        if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1;
542
        eni_vcc->rxing++;
543
        return 0;
544
}
545
 
546
 
547
static int rx_aal5(struct atm_vcc *vcc)
548
{
549
        struct eni_vcc *eni_vcc;
550
        unsigned long descr;
551
        unsigned long size,eff,length;
552
        struct sk_buff *skb;
553
 
554
        EVENT("rx_aal5\n",0,0);
555
        DPRINTK(">rx_aal5\n");
556
        eni_vcc = ENI_VCC(vcc);
557
        descr = readl(eni_vcc->recv+eni_vcc->descr*4);
558
        if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
559
                rx_ident_err(vcc);
560
                return 1;
561
        }
562
        if (descr & (MID_RED_T | MID_RED_CRC_ERR)) {
563
                if (descr & MID_RED_T) {
564
                        EVENT("empty cell (descr=0x%lx)\n",descr,0);
565
                        DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
566
                            vcc->dev->number);
567
                        size = 0;
568
                }
569
                else {
570
                        static unsigned long silence = 0;
571
 
572
                        if (time_after(jiffies, silence) || silence == 0) {
573
                                printk(KERN_WARNING DEV_LABEL "(itf %d): "
574
                                    "discarding PDU(s) with CRC error\n",
575
                                    vcc->dev->number);
576
                                silence = (jiffies+2*HZ)|1;
577
                        }
578
                        size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
579
                        EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr,
580
                            size);
581
                }
582
                eff = length = 0;
583
                atomic_inc(&vcc->stats->rx_err);
584
        }
585
        else {
586
                size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
587
                DPRINTK("size=%ld\n",size);
588
                length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) &
589
                    (eni_vcc->words-1)))*4) & 0xffff;
590
                                /* -trailer(2)+header(1) */
591
                if (length && length <= (size << 2)-8 && length <=
592
                  ATM_MAX_AAL5_PDU) eff = (length+3) >> 2;
593
                else {                           /* ^ trailer length (8) */
594
                        EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr,
595
                            length);
596
                        printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU "
597
                            "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n",
598
                            vcc->dev->number,vcc->vci,length,size << 2,descr);
599
                        length = eff = 0;
600
                        atomic_inc(&vcc->stats->rx_err);
601
                }
602
        }
603
        skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL;
604
        if (!skb) {
605
                discard(vcc,size);
606
                return 0;
607
        }
608
        skb_put(skb,length);
609
        DPRINTK("got len %ld\n",length);
610
        if (do_rx_dma(vcc,skb,1,size,eff)) return 1;
611
        eni_vcc->rxing++;
612
        return 0;
613
}
614
 
615
 
616
static inline int rx_vcc(struct atm_vcc *vcc)
617
{
618
        void __iomem *vci_dsc;
619
        unsigned long tmp;
620
        struct eni_vcc *eni_vcc;
621
 
622
        eni_vcc = ENI_VCC(vcc);
623
        vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16;
624
        EVENT("rx_vcc(1)\n",0,0);
625
        while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >>
626
            MID_VCI_DESCR_SHIFT)) {
627
                EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n",
628
                    eni_vcc->descr,tmp);
629
                DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
630
                    (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
631
                    MID_VCI_DESCR_SHIFT));
632
                if (ENI_VCC(vcc)->rx(vcc)) return 1;
633
        }
634
        /* clear IN_SERVICE flag */
635
        writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc);
636
        /*
637
         * If new data has arrived between evaluating the while condition and
638
         * clearing IN_SERVICE, we wouldn't be notified until additional data
639
         * follows. So we have to loop again to be sure.
640
         */
641
        EVENT("rx_vcc(3)\n",0,0);
642
        while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR)
643
            >> MID_VCI_DESCR_SHIFT)) {
644
                EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n",
645
                    eni_vcc->descr,tmp);
646
                DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
647
                    (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
648
                    MID_VCI_DESCR_SHIFT));
649
                if (ENI_VCC(vcc)->rx(vcc)) return 1;
650
        }
651
        return 0;
652
}
653
 
654
 
655
static void poll_rx(struct atm_dev *dev)
656
{
657
        struct eni_dev *eni_dev;
658
        struct atm_vcc *curr;
659
 
660
        eni_dev = ENI_DEV(dev);
661
        while ((curr = eni_dev->fast)) {
662
                EVENT("poll_rx.fast\n",0,0);
663
                if (rx_vcc(curr)) return;
664
                eni_dev->fast = ENI_VCC(curr)->next;
665
                ENI_VCC(curr)->next = ENI_VCC_NOS;
666
                barrier();
667
                ENI_VCC(curr)->servicing--;
668
        }
669
        while ((curr = eni_dev->slow)) {
670
                EVENT("poll_rx.slow\n",0,0);
671
                if (rx_vcc(curr)) return;
672
                eni_dev->slow = ENI_VCC(curr)->next;
673
                ENI_VCC(curr)->next = ENI_VCC_NOS;
674
                barrier();
675
                ENI_VCC(curr)->servicing--;
676
        }
677
}
678
 
679
 
680
static void get_service(struct atm_dev *dev)
681
{
682
        struct eni_dev *eni_dev;
683
        struct atm_vcc *vcc;
684
        unsigned long vci;
685
 
686
        DPRINTK(">get_service\n");
687
        eni_dev = ENI_DEV(dev);
688
        while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) {
689
                vci = readl(eni_dev->service+eni_dev->serv_read*4);
690
                eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1);
691
                vcc = eni_dev->rx_map[vci & 1023];
692
                if (!vcc) {
693
                        printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not "
694
                            "found\n",dev->number,vci);
695
                        continue; /* nasty but we try to go on anyway */
696
                        /* @@@ nope, doesn't work */
697
                }
698
                EVENT("getting from service\n",0,0);
699
                if (ENI_VCC(vcc)->next != ENI_VCC_NOS) {
700
                        EVENT("double service\n",0,0);
701
                        DPRINTK("Grr, servicing VCC %ld twice\n",vci);
702
                        continue;
703
                }
704
                ENI_VCC(vcc)->timestamp = ktime_get_real();
705
                ENI_VCC(vcc)->next = NULL;
706
                if (vcc->qos.rxtp.traffic_class == ATM_CBR) {
707
                        if (eni_dev->fast)
708
                                ENI_VCC(eni_dev->last_fast)->next = vcc;
709
                        else eni_dev->fast = vcc;
710
                        eni_dev->last_fast = vcc;
711
                }
712
                else {
713
                        if (eni_dev->slow)
714
                                ENI_VCC(eni_dev->last_slow)->next = vcc;
715
                        else eni_dev->slow = vcc;
716
                        eni_dev->last_slow = vcc;
717
                }
718
putting++;
719
                ENI_VCC(vcc)->servicing++;
720
        }
721
}
722
 
723
 
724
static void dequeue_rx(struct atm_dev *dev)
725
{
726
        struct eni_dev *eni_dev;
727
        struct eni_vcc *eni_vcc;
728
        struct atm_vcc *vcc;
729
        struct sk_buff *skb;
730
        void __iomem *vci_dsc;
731
        int first;
732
 
733
        eni_dev = ENI_DEV(dev);
734
        first = 1;
735
        while (1) {
736
                skb = skb_dequeue(&eni_dev->rx_queue);
737
                if (!skb) {
738
                        if (first) {
739
                                DPRINTK(DEV_LABEL "(itf %d): RX but not "
740
                                    "rxing\n",dev->number);
741
                                EVENT("nothing to dequeue\n",0,0);
742
                        }
743
                        break;
744
                }
745
                EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb),
746
                    ENI_PRV_POS(skb));
747
rx_dequeued++;
748
                vcc = ATM_SKB(skb)->vcc;
749
                eni_vcc = ENI_VCC(vcc);
750
                first = 0;
751
                vci_dsc = eni_dev->vci+vcc->vci*16;
752
                if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb),
753
                    (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT,
754
                    eni_vcc->words)) {
755
                        EVENT("requeuing\n",0,0);
756
                        skb_queue_head(&eni_dev->rx_queue,skb);
757
                        break;
758
                }
759
                eni_vcc->rxing--;
760
                eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1);
761
                pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len,
762
                    PCI_DMA_TODEVICE);
763
                if (!skb->len) dev_kfree_skb_irq(skb);
764
                else {
765
                        EVENT("pushing (len=%ld)\n",skb->len,0);
766
                        if (vcc->qos.aal == ATM_AAL0)
767
                                *(unsigned long *) skb->data =
768
                                    ntohl(*(unsigned long *) skb->data);
769
                        memset(skb->cb,0,sizeof(struct eni_skb_prv));
770
                        vcc->push(vcc,skb);
771
                        pushed++;
772
                }
773
                atomic_inc(&vcc->stats->rx);
774
        }
775
        wake_up(&eni_dev->rx_wait);
776
}
777
 
778
 
779
static int open_rx_first(struct atm_vcc *vcc)
780
{
781
        struct eni_dev *eni_dev;
782
        struct eni_vcc *eni_vcc;
783
        unsigned long size;
784
 
785
        DPRINTK("open_rx_first\n");
786
        eni_dev = ENI_DEV(vcc->dev);
787
        eni_vcc = ENI_VCC(vcc);
788
        eni_vcc->rx = NULL;
789
        if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0;
790
        size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100;
791
        if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <=
792
            MID_MAX_BUF_SIZE)
793
                size = MID_MAX_BUF_SIZE;
794
        eni_vcc->recv = eni_alloc_mem(eni_dev,&size);
795
        DPRINTK("rx at 0x%lx\n",eni_vcc->recv);
796
        eni_vcc->words = size >> 2;
797
        if (!eni_vcc->recv) return -ENOBUFS;
798
        eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0;
799
        eni_vcc->descr = 0;
800
        eni_vcc->rx_pos = 0;
801
        eni_vcc->rxing = 0;
802
        eni_vcc->servicing = 0;
803
        eni_vcc->next = ENI_VCC_NOS;
804
        return 0;
805
}
806
 
807
 
808
static int open_rx_second(struct atm_vcc *vcc)
809
{
810
        void __iomem *here;
811
        struct eni_dev *eni_dev;
812
        struct eni_vcc *eni_vcc;
813
        unsigned long size;
814
        int order;
815
 
816
        DPRINTK("open_rx_second\n");
817
        eni_dev = ENI_DEV(vcc->dev);
818
        eni_vcc = ENI_VCC(vcc);
819
        if (!eni_vcc->rx) return 0;
820
        /* set up VCI descriptor */
821
        here = eni_dev->vci+vcc->vci*16;
822
        DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4);
823
        size = eni_vcc->words >> 8;
824
        for (order = -1; size; order++) size >>= 1;
825
        writel(0,here+4); /* descr, read = 0 */
826
        writel(0,here+8); /* write, state, count = 0 */
827
        if (eni_dev->rx_map[vcc->vci])
828
                printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already "
829
                    "in use\n",vcc->dev->number,vcc->vci);
830
        eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */
831
        writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) <<
832
            MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE |
833
            (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) <<
834
            MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here);
835
        return 0;
836
}
837
 
838
 
839
static void close_rx(struct atm_vcc *vcc)
840
{
841
        DECLARE_WAITQUEUE(wait,current);
842
        void __iomem *here;
843
        struct eni_dev *eni_dev;
844
        struct eni_vcc *eni_vcc;
845
 
846
        eni_vcc = ENI_VCC(vcc);
847
        if (!eni_vcc->rx) return;
848
        eni_dev = ENI_DEV(vcc->dev);
849
        if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) {
850
                here = eni_dev->vci+vcc->vci*16;
851
                /* block receiver */
852
                writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH <<
853
                    MID_VCI_MODE_SHIFT),here);
854
                /* wait for receiver to become idle */
855
                udelay(27);
856
                /* discard pending cell */
857
                writel(readl(here) & ~MID_VCI_IN_SERVICE,here);
858
                /* don't accept any new ones */
859
                eni_dev->rx_map[vcc->vci] = NULL;
860
                /* wait for RX queue to drain */
861
                DPRINTK("eni_close: waiting for RX ...\n");
862
                EVENT("RX closing\n",0,0);
863
                add_wait_queue(&eni_dev->rx_wait,&wait);
864
                set_current_state(TASK_UNINTERRUPTIBLE);
865
                barrier();
866
                for (;;) {
867
                        /* transition service->rx: rxing++, servicing-- */
868
                        if (!eni_vcc->servicing) {
869
                                barrier();
870
                                if (!eni_vcc->rxing) break;
871
                        }
872
                        EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing,
873
                            eni_vcc->servicing);
874
                        printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing,
875
                            eni_vcc->rxing);
876
                        schedule();
877
                        set_current_state(TASK_UNINTERRUPTIBLE);
878
                }
879
                for (;;) {
880
                        int at_end;
881
                        u32 tmp;
882
 
883
                        tasklet_disable(&eni_dev->task);
884
                        tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ;
885
                        at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT;
886
                        tasklet_enable(&eni_dev->task);
887
                        if (at_end) break;
888
                        EVENT("drain discard (host 0x%lx, nic 0x%lx)\n",
889
                            eni_vcc->rx_pos,tmp);
890
                        printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n",
891
                            eni_vcc->rx_pos,tmp);
892
                        schedule();
893
                        set_current_state(TASK_UNINTERRUPTIBLE);
894
                }
895
                set_current_state(TASK_RUNNING);
896
                remove_wait_queue(&eni_dev->rx_wait,&wait);
897
        }
898
        eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2);
899
        eni_vcc->rx = NULL;
900
}
901
 
902
 
903
static int start_rx(struct atm_dev *dev)
904
{
905
        struct eni_dev *eni_dev;
906
 
907
        eni_dev = ENI_DEV(dev);
908
        eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL);
909
        if (!eni_dev->rx_map) {
910
                printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
911
                    dev->number);
912
                free_page((unsigned long) eni_dev->free_list);
913
                return -ENOMEM;
914
        }
915
        eni_dev->rx_mult = DEFAULT_RX_MULT;
916
        eni_dev->fast = eni_dev->last_fast = NULL;
917
        eni_dev->slow = eni_dev->last_slow = NULL;
918
        init_waitqueue_head(&eni_dev->rx_wait);
919
        skb_queue_head_init(&eni_dev->rx_queue);
920
        eni_dev->serv_read = eni_in(MID_SERV_WRITE);
921
        eni_out(0,MID_DMA_WR_RX);
922
        return 0;
923
}
924
 
925
 
926
/*----------------------------------- TX ------------------------------------*/
927
 
928
 
929
enum enq_res { enq_ok,enq_next,enq_jam };
930
 
931
 
932
static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr,
933
    u32 size)
934
{
935
        u32 init,words;
936
 
937
        DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size);
938
        EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size);
939
#if 0 /* don't complain anymore */
940
        if (paddr & 3)
941
                printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr);
942
        if (size & 3)
943
                printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size);
944
#endif
945
        if (paddr & 3) {
946
                init = 4-(paddr & 3);
947
                if (init > size || size < 7) init = size;
948
                DPRINTK("put_dma: %lx DMA: %d/%d bytes\n",
949
                    (unsigned long) paddr,init,size);
950
                dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) |
951
                    (chan << MID_DMA_CHAN_SHIFT);
952
                dma[(*j)++] = paddr;
953
                paddr += init;
954
                size -= init;
955
        }
956
        words = size >> 2;
957
        size &= 3;
958
        if (words && (paddr & 31)) {
959
                init = 8-((paddr & 31) >> 2);
960
                if (init > words) init = words;
961
                DPRINTK("put_dma: %lx DMA: %d/%d words\n",
962
                    (unsigned long) paddr,init,words);
963
                dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
964
                    (chan << MID_DMA_CHAN_SHIFT);
965
                dma[(*j)++] = paddr;
966
                paddr += init << 2;
967
                words -= init;
968
        }
969
#ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */
970
        if (words & ~15) {
971
                DPRINTK("put_dma: %lx DMA: %d*16/%d words\n",
972
                    (unsigned long) paddr,words >> 4,words);
973
                dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT)
974
                    | (chan << MID_DMA_CHAN_SHIFT);
975
                dma[(*j)++] = paddr;
976
                paddr += (words & ~15) << 2;
977
                words &= 15;
978
        }
979
#endif
980
#ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */
981
        if (words & ~7) {
982
                DPRINTK("put_dma: %lx DMA: %d*8/%d words\n",
983
                    (unsigned long) paddr,words >> 3,words);
984
                dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT)
985
                    | (chan << MID_DMA_CHAN_SHIFT);
986
                dma[(*j)++] = paddr;
987
                paddr += (words & ~7) << 2;
988
                words &= 7;
989
        }
990
#endif
991
#ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */
992
        if (words & ~3) {
993
                DPRINTK("put_dma: %lx DMA: %d*4/%d words\n",
994
                    (unsigned long) paddr,words >> 2,words);
995
                dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT)
996
                    | (chan << MID_DMA_CHAN_SHIFT);
997
                dma[(*j)++] = paddr;
998
                paddr += (words & ~3) << 2;
999
                words &= 3;
1000
        }
1001
#endif
1002
#ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */
1003
        if (words & ~1) {
1004
                DPRINTK("put_dma: %lx DMA: %d*2/%d words\n",
1005
                    (unsigned long) paddr,words >> 1,words);
1006
                dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT)
1007
                    | (chan << MID_DMA_CHAN_SHIFT);
1008
                dma[(*j)++] = paddr;
1009
                paddr += (words & ~1) << 2;
1010
                words &= 1;
1011
        }
1012
#endif
1013
        if (words) {
1014
                DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr,
1015
                    words);
1016
                dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) |
1017
                    (chan << MID_DMA_CHAN_SHIFT);
1018
                dma[(*j)++] = paddr;
1019
                paddr += words << 2;
1020
        }
1021
        if (size) {
1022
                DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr,
1023
                    size);
1024
                dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) |
1025
                    (chan << MID_DMA_CHAN_SHIFT);
1026
                dma[(*j)++] = paddr;
1027
        }
1028
}
1029
 
1030
 
1031
static enum enq_res do_tx(struct sk_buff *skb)
1032
{
1033
        struct atm_vcc *vcc;
1034
        struct eni_dev *eni_dev;
1035
        struct eni_vcc *eni_vcc;
1036
        struct eni_tx *tx;
1037
        dma_addr_t paddr;
1038
        u32 dma_rd,dma_wr;
1039
        u32 size; /* in words */
1040
        int aal5,dma_size,i,j;
1041
 
1042
        DPRINTK(">do_tx\n");
1043
        NULLCHECK(skb);
1044
        EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len);
1045
        vcc = ATM_SKB(skb)->vcc;
1046
        NULLCHECK(vcc);
1047
        eni_dev = ENI_DEV(vcc->dev);
1048
        NULLCHECK(eni_dev);
1049
        eni_vcc = ENI_VCC(vcc);
1050
        tx = eni_vcc->tx;
1051
        NULLCHECK(tx);
1052
#if 0 /* Enable this for testing with the "align" program */
1053
        {
1054
                unsigned int hack = *((char *) skb->data)-'0';
1055
 
1056
                if (hack < 8) {
1057
                        skb->data += hack;
1058
                        skb->len -= hack;
1059
                }
1060
        }
1061
#endif
1062
#if 0 /* should work now */
1063
        if ((unsigned long) skb->data & 3)
1064
                printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned "
1065
                    "TX data\n",vcc->dev->number,vcc->vci);
1066
#endif
1067
        /*
1068
         * Potential future IP speedup: make hard_header big enough to put
1069
         * segmentation descriptor directly into PDU. Saves: 4 slave writes,
1070
         * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-)
1071
         */
1072
 
1073
        aal5 = vcc->qos.aal == ATM_AAL5;
1074
        /* check space in buffer */
1075
        if (!aal5)
1076
                size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE;
1077
                        /* cell without HEC plus segmentation header (includes
1078
                           four-byte cell header) */
1079
        else {
1080
                size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1;
1081
                        /* add AAL5 trailer */
1082
                size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE;
1083
                                                /* add segmentation header */
1084
        }
1085
        /*
1086
         * Can I move tx_pos by size bytes without getting closer than TX_GAP
1087
         * to the read pointer ? TX_GAP means to leave some space for what
1088
         * the manual calls "too close".
1089
         */
1090
        if (!NEPMOK(tx->tx_pos,size+TX_GAP,
1091
            eni_in(MID_TX_RDPTR(tx->index)),tx->words)) {
1092
                DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n",
1093
                    vcc->dev->number,size);
1094
                return enq_next;
1095
        }
1096
        /* check DMA */
1097
        dma_wr = eni_in(MID_DMA_WR_TX);
1098
        dma_rd = eni_in(MID_DMA_RD_TX);
1099
        dma_size = 3; /* JK for descriptor and final fill, plus final size
1100
                         mis-alignment fix */
1101
DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags);
1102
        if (!skb_shinfo(skb)->nr_frags) dma_size += 5;
1103
        else dma_size += 5*(skb_shinfo(skb)->nr_frags+1);
1104
        if (dma_size > TX_DMA_BUF) {
1105
                printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries "
1106
                    "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF);
1107
        }
1108
        DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos);
1109
        if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) <
1110
             dma_size) {
1111
                printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n",
1112
                    vcc->dev->number);
1113
                return enq_jam;
1114
        }
1115
        paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len,
1116
            PCI_DMA_TODEVICE);
1117
        ENI_PRV_PADDR(skb) = paddr;
1118
        /* prepare DMA queue entries */
1119
        j = 0;
1120
        eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) <<
1121
             MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1122
             MID_DT_JK;
1123
        j++;
1124
        if (!skb_shinfo(skb)->nr_frags)
1125
                if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len);
1126
                else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4);
1127
        else {
1128
DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */
1129
                for (i = -1; i < skb_shinfo(skb)->nr_frags; i++)
1130
                        if (i == -1)
1131
                                put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1132
                                    skb->data,
1133
                                    skb->len - skb->data_len);
1134
                        else
1135
                                put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1136
                                    skb_shinfo(skb)->frags[i].page + skb_shinfo(skb)->frags[i].page_offset,
1137
                                    skb_shinfo(skb)->frags[i].size);
1138
        }
1139
        if (skb->len & 3)
1140
                put_dma(tx->index,eni_dev->dma,&j,zeroes,4-(skb->len & 3));
1141
        /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */
1142
        eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) <<
1143
             MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1144
             MID_DMA_END | MID_DT_JK;
1145
        j++;
1146
        DPRINTK("DMA at end: %d\n",j);
1147
        /* store frame */
1148
        writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) |
1149
            (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) |
1150
            (tx->resolution << MID_SEG_RATE_SHIFT) |
1151
            (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4);
1152
/*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/
1153
        writel((vcc->vci << MID_SEG_VCI_SHIFT) |
1154
            (aal5 ? 0 : (skb->data[3] & 0xf)) |
1155
            (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0),
1156
            tx->send+((tx->tx_pos+1) & (tx->words-1))*4);
1157
        DPRINTK("size: %d, len:%d\n",size,skb->len);
1158
        if (aal5)
1159
                writel(skb->len,tx->send+
1160
                    ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4);
1161
        j = j >> 1;
1162
        for (i = 0; i < j; i++) {
1163
                writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8);
1164
                writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4);
1165
                dma_wr = (dma_wr+1) & (NR_DMA_TX-1);
1166
        }
1167
        ENI_PRV_POS(skb) = tx->tx_pos;
1168
        ENI_PRV_SIZE(skb) = size;
1169
        ENI_VCC(vcc)->txing += size;
1170
        tx->tx_pos = (tx->tx_pos+size) & (tx->words-1);
1171
        DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos);
1172
        eni_out(dma_wr,MID_DMA_WR_TX);
1173
        skb_queue_tail(&eni_dev->tx_queue,skb);
1174
queued++;
1175
        return enq_ok;
1176
}
1177
 
1178
 
1179
static void poll_tx(struct atm_dev *dev)
1180
{
1181
        struct eni_tx *tx;
1182
        struct sk_buff *skb;
1183
        enum enq_res res;
1184
        int i;
1185
 
1186
        DPRINTK(">poll_tx\n");
1187
        for (i = NR_CHAN-1; i >= 0; i--) {
1188
                tx = &ENI_DEV(dev)->tx[i];
1189
                if (tx->send)
1190
                        while ((skb = skb_dequeue(&tx->backlog))) {
1191
                                res = do_tx(skb);
1192
                                if (res == enq_ok) continue;
1193
                                DPRINTK("re-queuing TX PDU\n");
1194
                                skb_queue_head(&tx->backlog,skb);
1195
requeued++;
1196
                                if (res == enq_jam) return;
1197
                                break;
1198
                        }
1199
        }
1200
}
1201
 
1202
 
1203
static void dequeue_tx(struct atm_dev *dev)
1204
{
1205
        struct eni_dev *eni_dev;
1206
        struct atm_vcc *vcc;
1207
        struct sk_buff *skb;
1208
        struct eni_tx *tx;
1209
 
1210
        NULLCHECK(dev);
1211
        eni_dev = ENI_DEV(dev);
1212
        NULLCHECK(eni_dev);
1213
        while ((skb = skb_dequeue(&eni_dev->tx_queue))) {
1214
                vcc = ATM_SKB(skb)->vcc;
1215
                NULLCHECK(vcc);
1216
                tx = ENI_VCC(vcc)->tx;
1217
                NULLCHECK(ENI_VCC(vcc)->tx);
1218
                DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb),
1219
                    (unsigned) eni_in(MID_TX_DESCRSTART(tx->index)));
1220
                if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) ==
1221
                    eni_in(MID_TX_DESCRSTART(tx->index))) {
1222
                        skb_queue_head(&eni_dev->tx_queue,skb);
1223
                        break;
1224
                }
1225
                ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb);
1226
                pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len,
1227
                    PCI_DMA_TODEVICE);
1228
                if (vcc->pop) vcc->pop(vcc,skb);
1229
                else dev_kfree_skb_irq(skb);
1230
                atomic_inc(&vcc->stats->tx);
1231
                wake_up(&eni_dev->tx_wait);
1232
dma_complete++;
1233
        }
1234
}
1235
 
1236
 
1237
static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr)
1238
{
1239
        int i;
1240
 
1241
        for (i = !ubr; i < NR_CHAN; i++)
1242
                if (!eni_dev->tx[i].send) return eni_dev->tx+i;
1243
        return NULL;
1244
}
1245
 
1246
 
1247
static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre,
1248
    int *res,int unlimited)
1249
{
1250
        static const int pre_div[] = { 4,16,128,2048 };
1251
            /* 2^(((x+2)^2-(x+2))/2+1) */
1252
 
1253
        if (unlimited) *pre = *res = 0;
1254
        else {
1255
                if (*pcr > 0) {
1256
                        int div;
1257
 
1258
                        for (*pre = 0; *pre < 3; (*pre)++)
1259
                                if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break;
1260
                        div = pre_div[*pre]**pcr;
1261
                        DPRINTK("min div %d\n",div);
1262
                        *res = TS_CLOCK/div-1;
1263
                }
1264
                else {
1265
                        int div;
1266
 
1267
                        if (!*pcr) *pcr = eni_dev->tx_bw+reserved;
1268
                        for (*pre = 3; *pre >= 0; (*pre)--)
1269
                                if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break;
1270
                        if (*pre < 3) (*pre)++; /* else fail later */
1271
                        div = pre_div[*pre]*-*pcr;
1272
                        DPRINTK("max div %d\n",div);
1273
                        *res = (TS_CLOCK+div-1)/div-1;
1274
                }
1275
                if (*res < 0) *res = 0;
1276
                if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE;
1277
        }
1278
        *pcr = TS_CLOCK/pre_div[*pre]/(*res+1);
1279
        DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res);
1280
        return 0;
1281
}
1282
 
1283
 
1284
static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp,
1285
    int set_rsv,int set_shp)
1286
{
1287
        struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1288
        struct eni_vcc *eni_vcc = ENI_VCC(vcc);
1289
        struct eni_tx *tx;
1290
        unsigned long size;
1291
        void __iomem *mem;
1292
        int rate,ubr,unlimited,new_tx;
1293
        int pre,res,order;
1294
        int error;
1295
 
1296
        rate = atm_pcr_goal(txtp);
1297
        ubr = txtp->traffic_class == ATM_UBR;
1298
        unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR ||
1299
            rate >= ATM_OC3_PCR);
1300
        if (!unlimited) {
1301
                size = txtp->max_sdu*eni_dev->tx_mult/100;
1302
                if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <=
1303
                    MID_MAX_BUF_SIZE)
1304
                        size = MID_MAX_BUF_SIZE;
1305
        }
1306
        else {
1307
                if (eni_dev->ubr) {
1308
                        eni_vcc->tx = eni_dev->ubr;
1309
                        txtp->pcr = ATM_OC3_PCR;
1310
                        return 0;
1311
                }
1312
                size = UBR_BUFFER;
1313
        }
1314
        new_tx = !eni_vcc->tx;
1315
        mem = NULL; /* for gcc */
1316
        if (!new_tx) tx = eni_vcc->tx;
1317
        else {
1318
                mem = eni_alloc_mem(eni_dev,&size);
1319
                if (!mem) return -ENOBUFS;
1320
                tx = alloc_tx(eni_dev,unlimited);
1321
                if (!tx) {
1322
                        eni_free_mem(eni_dev,mem,size);
1323
                        return -EBUSY;
1324
                }
1325
                DPRINTK("got chan %d\n",tx->index);
1326
                tx->reserved = tx->shaping = 0;
1327
                tx->send = mem;
1328
                tx->words = size >> 2;
1329
                skb_queue_head_init(&tx->backlog);
1330
                for (order = 0; size > (1 << (order+10)); order++);
1331
                eni_out((order << MID_SIZE_SHIFT) |
1332
                    ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)),
1333
                    MID_TX_PLACE(tx->index));
1334
                tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) &
1335
                    MID_DESCR_START;
1336
        }
1337
        error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited);
1338
        if (!error  && txtp->min_pcr > rate) error = -EINVAL;
1339
        if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR &&
1340
            txtp->max_pcr < rate) error = -EINVAL;
1341
        if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved)
1342
                error = -EINVAL;
1343
        if (!error && set_rsv && !set_shp && rate < tx->shaping)
1344
                error = -EINVAL;
1345
        if (!error && !set_rsv && rate > tx->reserved && !ubr)
1346
                error = -EINVAL;
1347
        if (error) {
1348
                if (new_tx) {
1349
                        tx->send = NULL;
1350
                        eni_free_mem(eni_dev,mem,size);
1351
                }
1352
                return error;
1353
        }
1354
        txtp->pcr = rate;
1355
        if (set_rsv && !ubr) {
1356
                eni_dev->tx_bw += tx->reserved;
1357
                tx->reserved = rate;
1358
                eni_dev->tx_bw -= rate;
1359
        }
1360
        if (set_shp || (unlimited && new_tx)) {
1361
                if (unlimited && new_tx) eni_dev->ubr = tx;
1362
                tx->prescaler = pre;
1363
                tx->resolution = res;
1364
                tx->shaping = rate;
1365
        }
1366
        if (set_shp) eni_vcc->tx = tx;
1367
        DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping);
1368
        return 0;
1369
}
1370
 
1371
 
1372
static int open_tx_first(struct atm_vcc *vcc)
1373
{
1374
        ENI_VCC(vcc)->tx = NULL;
1375
        if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0;
1376
        ENI_VCC(vcc)->txing = 0;
1377
        return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1);
1378
}
1379
 
1380
 
1381
static int open_tx_second(struct atm_vcc *vcc)
1382
{
1383
        return 0; /* nothing to do */
1384
}
1385
 
1386
 
1387
static void close_tx(struct atm_vcc *vcc)
1388
{
1389
        DECLARE_WAITQUEUE(wait,current);
1390
        struct eni_dev *eni_dev;
1391
        struct eni_vcc *eni_vcc;
1392
 
1393
        eni_vcc = ENI_VCC(vcc);
1394
        if (!eni_vcc->tx) return;
1395
        eni_dev = ENI_DEV(vcc->dev);
1396
        /* wait for TX queue to drain */
1397
        DPRINTK("eni_close: waiting for TX ...\n");
1398
        add_wait_queue(&eni_dev->tx_wait,&wait);
1399
        set_current_state(TASK_UNINTERRUPTIBLE);
1400
        for (;;) {
1401
                int txing;
1402
 
1403
                tasklet_disable(&eni_dev->task);
1404
                txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing;
1405
                tasklet_enable(&eni_dev->task);
1406
                if (!txing) break;
1407
                DPRINTK("%d TX left\n",eni_vcc->txing);
1408
                schedule();
1409
                set_current_state(TASK_UNINTERRUPTIBLE);
1410
        }
1411
        set_current_state(TASK_RUNNING);
1412
        remove_wait_queue(&eni_dev->tx_wait,&wait);
1413
        if (eni_vcc->tx != eni_dev->ubr) {
1414
                /*
1415
                 * Looping a few times in here is probably far cheaper than
1416
                 * keeping track of TX completions all the time, so let's poll
1417
                 * a bit ...
1418
                 */
1419
                while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) !=
1420
                    eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index)))
1421
                        schedule();
1422
                eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2);
1423
                eni_vcc->tx->send = NULL;
1424
                eni_dev->tx_bw += eni_vcc->tx->reserved;
1425
        }
1426
        eni_vcc->tx = NULL;
1427
}
1428
 
1429
 
1430
static int start_tx(struct atm_dev *dev)
1431
{
1432
        struct eni_dev *eni_dev;
1433
        int i;
1434
 
1435
        eni_dev = ENI_DEV(dev);
1436
        eni_dev->lost = 0;
1437
        eni_dev->tx_bw = ATM_OC3_PCR;
1438
        eni_dev->tx_mult = DEFAULT_TX_MULT;
1439
        init_waitqueue_head(&eni_dev->tx_wait);
1440
        eni_dev->ubr = NULL;
1441
        skb_queue_head_init(&eni_dev->tx_queue);
1442
        eni_out(0,MID_DMA_WR_TX);
1443
        for (i = 0; i < NR_CHAN; i++) {
1444
                eni_dev->tx[i].send = NULL;
1445
                eni_dev->tx[i].index = i;
1446
        }
1447
        return 0;
1448
}
1449
 
1450
 
1451
/*--------------------------------- common ----------------------------------*/
1452
 
1453
 
1454
#if 0 /* may become useful again when tuning things */
1455
 
1456
static void foo(void)
1457
{
1458
printk(KERN_INFO
1459
  "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n"
1460
  "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n",
1461
  tx_complete,dma_complete,queued,requeued,submitted,backlogged,
1462
  rx_enqueued,rx_dequeued,putting,pushed);
1463
if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost);
1464
}
1465
 
1466
#endif
1467
 
1468
 
1469
static void bug_int(struct atm_dev *dev,unsigned long reason)
1470
{
1471
        struct eni_dev *eni_dev;
1472
 
1473
        DPRINTK(">bug_int\n");
1474
        eni_dev = ENI_DEV(dev);
1475
        if (reason & MID_DMA_ERR_ACK)
1476
                printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1477
                    "error\n",dev->number);
1478
        if (reason & MID_TX_IDENT_MISM)
1479
                printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident "
1480
                    "mismatch\n",dev->number);
1481
        if (reason & MID_TX_DMA_OVFL)
1482
                printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1483
                    "overflow\n",dev->number);
1484
        EVENT("---dump ends here---\n",0,0);
1485
        printk(KERN_NOTICE "---recent events---\n");
1486
        event_dump();
1487
}
1488
 
1489
 
1490
static irqreturn_t eni_int(int irq,void *dev_id)
1491
{
1492
        struct atm_dev *dev;
1493
        struct eni_dev *eni_dev;
1494
        u32 reason;
1495
 
1496
        DPRINTK(">eni_int\n");
1497
        dev = dev_id;
1498
        eni_dev = ENI_DEV(dev);
1499
        reason = eni_in(MID_ISA);
1500
        DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason);
1501
        /*
1502
         * Must handle these two right now, because reading ISA doesn't clear
1503
         * them, so they re-occur and we never make it to the tasklet. Since
1504
         * they're rare, we don't mind the occasional invocation of eni_tasklet
1505
         * with eni_dev->events == 0.
1506
         */
1507
        if (reason & MID_STAT_OVFL) {
1508
                EVENT("stat overflow\n",0,0);
1509
                eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH;
1510
        }
1511
        if (reason & MID_SUNI_INT) {
1512
                EVENT("SUNI int\n",0,0);
1513
                dev->phy->interrupt(dev);
1514
#if 0
1515
                foo();
1516
#endif
1517
        }
1518
        spin_lock(&eni_dev->lock);
1519
        eni_dev->events |= reason;
1520
        spin_unlock(&eni_dev->lock);
1521
        tasklet_schedule(&eni_dev->task);
1522
        return IRQ_HANDLED;
1523
}
1524
 
1525
 
1526
static void eni_tasklet(unsigned long data)
1527
{
1528
        struct atm_dev *dev = (struct atm_dev *) data;
1529
        struct eni_dev *eni_dev = ENI_DEV(dev);
1530
        unsigned long flags;
1531
        u32 events;
1532
 
1533
        DPRINTK("eni_tasklet (dev %p)\n",dev);
1534
        spin_lock_irqsave(&eni_dev->lock,flags);
1535
        events = xchg(&eni_dev->events,0);
1536
        spin_unlock_irqrestore(&eni_dev->lock,flags);
1537
        if (events & MID_RX_DMA_COMPLETE) {
1538
                EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0);
1539
                dequeue_rx(dev);
1540
                EVENT("dequeue_rx done, starting poll_rx\n",0,0);
1541
                poll_rx(dev);
1542
                EVENT("poll_rx done\n",0,0);
1543
                /* poll_tx ? */
1544
        }
1545
        if (events & MID_SERVICE) {
1546
                EVENT("INT: service, starting get_service\n",0,0);
1547
                get_service(dev);
1548
                EVENT("get_service done, starting poll_rx\n",0,0);
1549
                poll_rx(dev);
1550
                EVENT("poll_rx done\n",0,0);
1551
        }
1552
        if (events & MID_TX_DMA_COMPLETE) {
1553
                EVENT("INT: TX DMA COMPLETE\n",0,0);
1554
                dequeue_tx(dev);
1555
        }
1556
        if (events & MID_TX_COMPLETE) {
1557
                EVENT("INT: TX COMPLETE\n",0,0);
1558
tx_complete++;
1559
                wake_up(&eni_dev->tx_wait);
1560
                /* poll_rx ? */
1561
        }
1562
        if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) {
1563
                EVENT("bug interrupt\n",0,0);
1564
                bug_int(dev,events);
1565
        }
1566
        poll_tx(dev);
1567
}
1568
 
1569
 
1570
/*--------------------------------- entries ---------------------------------*/
1571
 
1572
 
1573
static const char *media_name[] __devinitdata = {
1574
    "MMF", "SMF", "MMF", "03?", /*  0- 3 */
1575
    "UTP", "05?", "06?", "07?", /*  4- 7 */
1576
    "TAXI","09?", "10?", "11?", /*  8-11 */
1577
    "12?", "13?", "14?", "15?", /* 12-15 */
1578
    "MMF", "SMF", "18?", "19?", /* 16-19 */
1579
    "UTP", "21?", "22?", "23?", /* 20-23 */
1580
    "24?", "25?", "26?", "27?", /* 24-27 */
1581
    "28?", "29?", "30?", "31?"  /* 28-31 */
1582
};
1583
 
1584
 
1585
#define SET_SEPROM \
1586
  ({ if (!error && !pci_error) { \
1587
    pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \
1588
    udelay(10); /* 10 usecs */ \
1589
  } })
1590
#define GET_SEPROM \
1591
  ({ if (!error && !pci_error) { \
1592
    pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \
1593
    udelay(10); /* 10 usecs */ \
1594
  } })
1595
 
1596
 
1597
static int __devinit get_esi_asic(struct atm_dev *dev)
1598
{
1599
        struct eni_dev *eni_dev;
1600
        unsigned char tonga;
1601
        int error,failed,pci_error;
1602
        int address,i,j;
1603
 
1604
        eni_dev = ENI_DEV(dev);
1605
        error = pci_error = 0;
1606
        tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK;
1607
        SET_SEPROM;
1608
        for (i = 0; i < ESI_LEN && !error && !pci_error; i++) {
1609
                /* start operation */
1610
                tonga |= SEPROM_DATA;
1611
                SET_SEPROM;
1612
                tonga |= SEPROM_CLK;
1613
                SET_SEPROM;
1614
                tonga &= ~SEPROM_DATA;
1615
                SET_SEPROM;
1616
                tonga &= ~SEPROM_CLK;
1617
                SET_SEPROM;
1618
                /* send address */
1619
                address = ((i+SEPROM_ESI_BASE) << 1)+1;
1620
                for (j = 7; j >= 0; j--) {
1621
                        tonga = (address >> j) & 1 ? tonga | SEPROM_DATA :
1622
                            tonga & ~SEPROM_DATA;
1623
                        SET_SEPROM;
1624
                        tonga |= SEPROM_CLK;
1625
                        SET_SEPROM;
1626
                        tonga &= ~SEPROM_CLK;
1627
                        SET_SEPROM;
1628
                }
1629
                /* get ack */
1630
                tonga |= SEPROM_DATA;
1631
                SET_SEPROM;
1632
                tonga |= SEPROM_CLK;
1633
                SET_SEPROM;
1634
                GET_SEPROM;
1635
                failed = tonga & SEPROM_DATA;
1636
                tonga &= ~SEPROM_CLK;
1637
                SET_SEPROM;
1638
                tonga |= SEPROM_DATA;
1639
                SET_SEPROM;
1640
                if (failed) error = -EIO;
1641
                else {
1642
                        dev->esi[i] = 0;
1643
                        for (j = 7; j >= 0; j--) {
1644
                                dev->esi[i] <<= 1;
1645
                                tonga |= SEPROM_DATA;
1646
                                SET_SEPROM;
1647
                                tonga |= SEPROM_CLK;
1648
                                SET_SEPROM;
1649
                                GET_SEPROM;
1650
                                if (tonga & SEPROM_DATA) dev->esi[i] |= 1;
1651
                                tonga &= ~SEPROM_CLK;
1652
                                SET_SEPROM;
1653
                                tonga |= SEPROM_DATA;
1654
                                SET_SEPROM;
1655
                        }
1656
                        /* get ack */
1657
                        tonga |= SEPROM_DATA;
1658
                        SET_SEPROM;
1659
                        tonga |= SEPROM_CLK;
1660
                        SET_SEPROM;
1661
                        GET_SEPROM;
1662
                        if (!(tonga & SEPROM_DATA)) error = -EIO;
1663
                        tonga &= ~SEPROM_CLK;
1664
                        SET_SEPROM;
1665
                        tonga |= SEPROM_DATA;
1666
                        SET_SEPROM;
1667
                }
1668
                /* stop operation */
1669
                tonga &= ~SEPROM_DATA;
1670
                SET_SEPROM;
1671
                tonga |= SEPROM_CLK;
1672
                SET_SEPROM;
1673
                tonga |= SEPROM_DATA;
1674
                SET_SEPROM;
1675
        }
1676
        if (pci_error) {
1677
                printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI "
1678
                    "(0x%02x)\n",dev->number,pci_error);
1679
                error = -EIO;
1680
        }
1681
        return error;
1682
}
1683
 
1684
 
1685
#undef SET_SEPROM
1686
#undef GET_SEPROM
1687
 
1688
 
1689
static int __devinit get_esi_fpga(struct atm_dev *dev, void __iomem *base)
1690
{
1691
        void __iomem *mac_base;
1692
        int i;
1693
 
1694
        mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom);
1695
        for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3));
1696
        return 0;
1697
}
1698
 
1699
 
1700
static int __devinit eni_do_init(struct atm_dev *dev)
1701
{
1702
        struct midway_eprom __iomem *eprom;
1703
        struct eni_dev *eni_dev;
1704
        struct pci_dev *pci_dev;
1705
        unsigned long real_base;
1706
        void __iomem *base;
1707
        int error,i,last;
1708
 
1709
        DPRINTK(">eni_init\n");
1710
        dev->ci_range.vpi_bits = 0;
1711
        dev->ci_range.vci_bits = NR_VCI_LD;
1712
        dev->link_rate = ATM_OC3_PCR;
1713
        eni_dev = ENI_DEV(dev);
1714
        pci_dev = eni_dev->pci_dev;
1715
        real_base = pci_resource_start(pci_dev, 0);
1716
        eni_dev->irq = pci_dev->irq;
1717
        if ((error = pci_write_config_word(pci_dev,PCI_COMMAND,
1718
            PCI_COMMAND_MEMORY |
1719
            (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1720
                printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory "
1721
                    "(0x%02x)\n",dev->number,error);
1722
                return -EIO;
1723
        }
1724
        printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,",
1725
            dev->number,pci_dev->revision,real_base,eni_dev->irq);
1726
        if (!(base = ioremap_nocache(real_base,MAP_MAX_SIZE))) {
1727
                printk("\n");
1728
                printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page "
1729
                    "mapping\n",dev->number);
1730
                return error;
1731
        }
1732
        eni_dev->base_diff = real_base - (unsigned long) base;
1733
        /* id may not be present in ASIC Tonga boards - check this @@@ */
1734
        if (!eni_dev->asic) {
1735
                eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom));
1736
                if (readl(&eprom->magic) != ENI155_MAGIC) {
1737
                        printk("\n");
1738
                        printk(KERN_ERR KERN_ERR DEV_LABEL "(itf %d): bad "
1739
                            "magic - expected 0x%x, got 0x%x\n",dev->number,
1740
                            ENI155_MAGIC,(unsigned) readl(&eprom->magic));
1741
                        error = -EINVAL;
1742
                        goto unmap;
1743
                }
1744
        }
1745
        eni_dev->phy = base+PHY_BASE;
1746
        eni_dev->reg = base+REG_BASE;
1747
        eni_dev->ram = base+RAM_BASE;
1748
        last = MAP_MAX_SIZE-RAM_BASE;
1749
        for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) {
1750
                writel(0x55555555,eni_dev->ram+i);
1751
                if (readl(eni_dev->ram+i) != 0x55555555) last = i;
1752
                else {
1753
                        writel(0xAAAAAAAA,eni_dev->ram+i);
1754
                        if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i;
1755
                        else writel(i,eni_dev->ram+i);
1756
                }
1757
        }
1758
        for (i = 0; i < last; i += RAM_INCREMENT)
1759
                if (readl(eni_dev->ram+i) != i) break;
1760
        eni_dev->mem = i;
1761
        memset_io(eni_dev->ram,0,eni_dev->mem);
1762
        /* TODO: should shrink allocation now */
1763
        printk("mem=%dkB (",eni_dev->mem >> 10);
1764
        /* TODO: check for non-SUNI, check for TAXI ? */
1765
        if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) {
1766
                printk(")\n");
1767
                printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n",
1768
                    dev->number,(unsigned) eni_in(MID_RES_ID_MCON));
1769
                error = -EINVAL;
1770
                goto unmap;
1771
        }
1772
        error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base);
1773
        if (error)
1774
                goto unmap;
1775
        for (i = 0; i < ESI_LEN; i++)
1776
                printk("%s%02X",i ? "-" : "",dev->esi[i]);
1777
        printk(")\n");
1778
        printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number,
1779
            eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA",
1780
            media_name[eni_in(MID_RES_ID_MCON) & DAUGTHER_ID]);
1781
 
1782
        error = suni_init(dev);
1783
        if (error)
1784
                goto unmap;
1785
out:
1786
        return error;
1787
unmap:
1788
        iounmap(base);
1789
        goto out;
1790
}
1791
 
1792
 
1793
static int __devinit eni_start(struct atm_dev *dev)
1794
{
1795
        struct eni_dev *eni_dev;
1796
 
1797
        void __iomem *buf;
1798
        unsigned long buffer_mem;
1799
        int error;
1800
 
1801
        DPRINTK(">eni_start\n");
1802
        eni_dev = ENI_DEV(dev);
1803
        if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) {
1804
                printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
1805
                    dev->number,eni_dev->irq);
1806
                error = -EAGAIN;
1807
                goto out;
1808
        }
1809
        pci_set_master(eni_dev->pci_dev);
1810
        if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND,
1811
            PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
1812
            (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1813
                printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+"
1814
                    "master (0x%02x)\n",dev->number,error);
1815
                goto free_irq;
1816
        }
1817
        if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,
1818
            END_SWAP_DMA))) {
1819
                printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap "
1820
                    "(0x%02x)\n",dev->number,error);
1821
                goto free_irq;
1822
        }
1823
        /* determine addresses of internal tables */
1824
        eni_dev->vci = eni_dev->ram;
1825
        eni_dev->rx_dma = eni_dev->ram+NR_VCI*16;
1826
        eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8;
1827
        eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8;
1828
        buf = eni_dev->service+NR_SERVICE*4;
1829
        DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n",
1830
             eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma,
1831
             eni_dev->service,buf);
1832
        spin_lock_init(&eni_dev->lock);
1833
        tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev);
1834
        eni_dev->events = 0;
1835
        /* initialize memory management */
1836
        buffer_mem = eni_dev->mem - (buf - eni_dev->ram);
1837
        eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2;
1838
        eni_dev->free_list = kmalloc(
1839
            sizeof(struct eni_free)*(eni_dev->free_list_size+1),GFP_KERNEL);
1840
        if (!eni_dev->free_list) {
1841
                printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
1842
                    dev->number);
1843
                error = -ENOMEM;
1844
                goto free_irq;
1845
        }
1846
        eni_dev->free_len = 0;
1847
        eni_put_free(eni_dev,buf,buffer_mem);
1848
        memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */
1849
        /*
1850
         * byte_addr  free (k)
1851
         * 0x00000000     512  VCI table
1852
         * 0x00004000     496  RX DMA
1853
         * 0x00005000     492  TX DMA
1854
         * 0x00006000     488  service list
1855
         * 0x00007000     484  buffers
1856
         * 0x00080000       0  end (512kB)
1857
         */
1858
        eni_out(0xffffffff,MID_IE);
1859
        error = start_tx(dev);
1860
        if (error) goto free_list;
1861
        error = start_rx(dev);
1862
        if (error) goto free_list;
1863
        error = dev->phy->start(dev);
1864
        if (error) goto free_list;
1865
        eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) |
1866
            MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE,
1867
            MID_MC_S);
1868
            /* Tonga uses SBus INTReq1 */
1869
        (void) eni_in(MID_ISA); /* clear Midway interrupts */
1870
        return 0;
1871
 
1872
free_list:
1873
        kfree(eni_dev->free_list);
1874
 
1875
free_irq:
1876
        free_irq(eni_dev->irq, eni_dev);
1877
 
1878
out:
1879
        return error;
1880
}
1881
 
1882
 
1883
static void eni_close(struct atm_vcc *vcc)
1884
{
1885
        DPRINTK(">eni_close\n");
1886
        if (!ENI_VCC(vcc)) return;
1887
        clear_bit(ATM_VF_READY,&vcc->flags);
1888
        close_rx(vcc);
1889
        close_tx(vcc);
1890
        DPRINTK("eni_close: done waiting\n");
1891
        /* deallocate memory */
1892
        kfree(ENI_VCC(vcc));
1893
        vcc->dev_data = NULL;
1894
        clear_bit(ATM_VF_ADDR,&vcc->flags);
1895
        /*foo();*/
1896
}
1897
 
1898
 
1899
static int eni_open(struct atm_vcc *vcc)
1900
{
1901
        struct eni_dev *eni_dev;
1902
        struct eni_vcc *eni_vcc;
1903
        int error;
1904
        short vpi = vcc->vpi;
1905
        int vci = vcc->vci;
1906
 
1907
        DPRINTK(">eni_open\n");
1908
        EVENT("eni_open\n",0,0);
1909
        if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1910
                vcc->dev_data = NULL;
1911
        eni_dev = ENI_DEV(vcc->dev);
1912
        if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
1913
                set_bit(ATM_VF_ADDR,&vcc->flags);
1914
        if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5)
1915
                return -EINVAL;
1916
        DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi,
1917
            vcc->vci);
1918
        if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
1919
                eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL);
1920
                if (!eni_vcc) return -ENOMEM;
1921
                vcc->dev_data = eni_vcc;
1922
                eni_vcc->tx = NULL; /* for eni_close after open_rx */
1923
                if ((error = open_rx_first(vcc))) {
1924
                        eni_close(vcc);
1925
                        return error;
1926
                }
1927
                if ((error = open_tx_first(vcc))) {
1928
                        eni_close(vcc);
1929
                        return error;
1930
                }
1931
        }
1932
        if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0;
1933
        if ((error = open_rx_second(vcc))) {
1934
                eni_close(vcc);
1935
                return error;
1936
        }
1937
        if ((error = open_tx_second(vcc))) {
1938
                eni_close(vcc);
1939
                return error;
1940
        }
1941
        set_bit(ATM_VF_READY,&vcc->flags);
1942
        /* should power down SUNI while !ref_count @@@ */
1943
        return 0;
1944
}
1945
 
1946
 
1947
static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs)
1948
{
1949
        struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1950
        struct eni_tx *tx = ENI_VCC(vcc)->tx;
1951
        struct sk_buff *skb;
1952
        int error,rate,rsv,shp;
1953
 
1954
        if (qos->txtp.traffic_class == ATM_NONE) return 0;
1955
        if (tx == eni_dev->ubr) return -EBADFD;
1956
        rate = atm_pcr_goal(&qos->txtp);
1957
        if (rate < 0) rate = -rate;
1958
        rsv = shp = 0;
1959
        if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1;
1960
        if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1;
1961
        if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1;
1962
        if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1;
1963
        if (!rsv && !shp) return 0;
1964
        error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp);
1965
        if (error) return error;
1966
        if (shp && !(flgs & ATM_MF_IMMED)) return 0;
1967
        /*
1968
         * Walk through the send buffer and patch the rate information in all
1969
         * segmentation buffer descriptors of this VCC.
1970
         */
1971
        tasklet_disable(&eni_dev->task);
1972
        skb_queue_walk(&eni_dev->tx_queue, skb) {
1973
                void __iomem *dsc;
1974
 
1975
                if (ATM_SKB(skb)->vcc != vcc) continue;
1976
                dsc = tx->send+ENI_PRV_POS(skb)*4;
1977
                writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) |
1978
                    (tx->prescaler << MID_SEG_PR_SHIFT) |
1979
                    (tx->resolution << MID_SEG_RATE_SHIFT), dsc);
1980
        }
1981
        tasklet_enable(&eni_dev->task);
1982
        return 0;
1983
}
1984
 
1985
 
1986
static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
1987
{
1988
        struct eni_dev *eni_dev = ENI_DEV(dev);
1989
 
1990
        if (cmd == ENI_MEMDUMP) {
1991
                if (!capable(CAP_NET_ADMIN)) return -EPERM;
1992
                printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d "
1993
                    "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number);
1994
                dump(dev);
1995
                return 0;
1996
        }
1997
        if (cmd == ENI_SETMULT) {
1998
                struct eni_multipliers mult;
1999
 
2000
                if (!capable(CAP_NET_ADMIN)) return -EPERM;
2001
                if (copy_from_user(&mult, arg,
2002
                    sizeof(struct eni_multipliers)))
2003
                        return -EFAULT;
2004
                if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) ||
2005
                    mult.tx > 65536 || mult.rx > 65536)
2006
                        return -EINVAL;
2007
                if (mult.tx) eni_dev->tx_mult = mult.tx;
2008
                if (mult.rx) eni_dev->rx_mult = mult.rx;
2009
                return 0;
2010
        }
2011
        if (cmd == ATM_SETCIRANGE) {
2012
                struct atm_cirange ci;
2013
 
2014
                if (copy_from_user(&ci, arg,sizeof(struct atm_cirange)))
2015
                        return -EFAULT;
2016
                if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) &&
2017
                    (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX))
2018
                    return 0;
2019
                return -EINVAL;
2020
        }
2021
        if (!dev->phy->ioctl) return -ENOIOCTLCMD;
2022
        return dev->phy->ioctl(dev,cmd,arg);
2023
}
2024
 
2025
 
2026
static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname,
2027
    void __user *optval,int optlen)
2028
{
2029
        return -EINVAL;
2030
}
2031
 
2032
 
2033
static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname,
2034
    void __user *optval,int optlen)
2035
{
2036
        return -EINVAL;
2037
}
2038
 
2039
 
2040
static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb)
2041
{
2042
        enum enq_res res;
2043
 
2044
        DPRINTK(">eni_send\n");
2045
        if (!ENI_VCC(vcc)->tx) {
2046
                if (vcc->pop) vcc->pop(vcc,skb);
2047
                else dev_kfree_skb(skb);
2048
                return -EINVAL;
2049
        }
2050
        if (!skb) {
2051
                printk(KERN_CRIT "!skb in eni_send ?\n");
2052
                if (vcc->pop) vcc->pop(vcc,skb);
2053
                return -EINVAL;
2054
        }
2055
        if (vcc->qos.aal == ATM_AAL0) {
2056
                if (skb->len != ATM_CELL_SIZE-1) {
2057
                        if (vcc->pop) vcc->pop(vcc,skb);
2058
                        else dev_kfree_skb(skb);
2059
                        return -EINVAL;
2060
                }
2061
                *(u32 *) skb->data = htonl(*(u32 *) skb->data);
2062
        }
2063
submitted++;
2064
        ATM_SKB(skb)->vcc = vcc;
2065
        tasklet_disable(&ENI_DEV(vcc->dev)->task);
2066
        res = do_tx(skb);
2067
        tasklet_enable(&ENI_DEV(vcc->dev)->task);
2068
        if (res == enq_ok) return 0;
2069
        skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb);
2070
backlogged++;
2071
        tasklet_schedule(&ENI_DEV(vcc->dev)->task);
2072
        return 0;
2073
}
2074
 
2075
static void eni_phy_put(struct atm_dev *dev,unsigned char value,
2076
    unsigned long addr)
2077
{
2078
        writel(value,ENI_DEV(dev)->phy+addr*4);
2079
}
2080
 
2081
 
2082
 
2083
static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr)
2084
{
2085
        return readl(ENI_DEV(dev)->phy+addr*4);
2086
}
2087
 
2088
 
2089
static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page)
2090
{
2091
        struct hlist_node *node;
2092
        struct sock *s;
2093
        static const char *signal[] = { "LOST","unknown","okay" };
2094
        struct eni_dev *eni_dev = ENI_DEV(dev);
2095
        struct atm_vcc *vcc;
2096
        int left,i;
2097
 
2098
        left = *pos;
2099
        if (!left)
2100
                return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, "
2101
                    "%d cps remaining\n",dev->number,signal[(int) dev->signal],
2102
                    eni_dev->mem >> 10,eni_dev->tx_bw);
2103
        if (!--left)
2104
                return sprintf(page,"%4sBursts: TX"
2105
#if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \
2106
    !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \
2107
    !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \
2108
    !defined(CONFIG_ATM_ENI_BURST_TX_2W)
2109
                    " none"
2110
#endif
2111
#ifdef CONFIG_ATM_ENI_BURST_TX_16W
2112
                    " 16W"
2113
#endif
2114
#ifdef CONFIG_ATM_ENI_BURST_TX_8W
2115
                    " 8W"
2116
#endif
2117
#ifdef CONFIG_ATM_ENI_BURST_TX_4W
2118
                    " 4W"
2119
#endif
2120
#ifdef CONFIG_ATM_ENI_BURST_TX_2W
2121
                    " 2W"
2122
#endif
2123
                    ", RX"
2124
#if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \
2125
    !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \
2126
    !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \
2127
    !defined(CONFIG_ATM_ENI_BURST_RX_2W)
2128
                    " none"
2129
#endif
2130
#ifdef CONFIG_ATM_ENI_BURST_RX_16W
2131
                    " 16W"
2132
#endif
2133
#ifdef CONFIG_ATM_ENI_BURST_RX_8W
2134
                    " 8W"
2135
#endif
2136
#ifdef CONFIG_ATM_ENI_BURST_RX_4W
2137
                    " 4W"
2138
#endif
2139
#ifdef CONFIG_ATM_ENI_BURST_RX_2W
2140
                    " 2W"
2141
#endif
2142
#ifndef CONFIG_ATM_ENI_TUNE_BURST
2143
                    " (default)"
2144
#endif
2145
                    "\n","");
2146
        if (!--left)
2147
                return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n",
2148
                    "",eni_dev->tx_mult,eni_dev->rx_mult);
2149
        for (i = 0; i < NR_CHAN; i++) {
2150
                struct eni_tx *tx = eni_dev->tx+i;
2151
 
2152
                if (!tx->send) continue;
2153
                if (!--left) {
2154
                        return sprintf(page,"tx[%d]:    0x%ld-0x%ld "
2155
                            "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i,
2156
                            (unsigned long) (tx->send - eni_dev->ram),
2157
                            tx->send-eni_dev->ram+tx->words*4-1,tx->words*4,
2158
                            tx->reserved,tx->shaping,
2159
                            tx == eni_dev->ubr ? " (UBR)" : "");
2160
                }
2161
                if (--left) continue;
2162
                return sprintf(page,"%10sbacklog %u packets\n","",
2163
                    skb_queue_len(&tx->backlog));
2164
        }
2165
        read_lock(&vcc_sklist_lock);
2166
        for(i = 0; i < VCC_HTABLE_SIZE; ++i) {
2167
                struct hlist_head *head = &vcc_hash[i];
2168
 
2169
                sk_for_each(s, node, head) {
2170
                        struct eni_vcc *eni_vcc;
2171
                        int length;
2172
 
2173
                        vcc = atm_sk(s);
2174
                        if (vcc->dev != dev)
2175
                                continue;
2176
                        eni_vcc = ENI_VCC(vcc);
2177
                        if (--left) continue;
2178
                        length = sprintf(page,"vcc %4d: ",vcc->vci);
2179
                        if (eni_vcc->rx) {
2180
                                length += sprintf(page+length,"0x%ld-0x%ld "
2181
                                    "(%6ld bytes)",
2182
                                    (unsigned long) (eni_vcc->recv - eni_dev->ram),
2183
                                    eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1,
2184
                                    eni_vcc->words*4);
2185
                                if (eni_vcc->tx) length += sprintf(page+length,", ");
2186
                        }
2187
                        if (eni_vcc->tx)
2188
                                length += sprintf(page+length,"tx[%d], txing %d bytes",
2189
                                    eni_vcc->tx->index,eni_vcc->txing);
2190
                        page[length] = '\n';
2191
                        read_unlock(&vcc_sklist_lock);
2192
                        return length+1;
2193
                }
2194
        }
2195
        read_unlock(&vcc_sklist_lock);
2196
        for (i = 0; i < eni_dev->free_len; i++) {
2197
                struct eni_free *fe = eni_dev->free_list+i;
2198
                unsigned long offset;
2199
 
2200
                if (--left) continue;
2201
                offset = (unsigned long) eni_dev->ram+eni_dev->base_diff;
2202
                return sprintf(page,"free      %p-%p (%6d bytes)\n",
2203
                    fe->start-offset,fe->start-offset+(1 << fe->order)-1,
2204
                    1 << fe->order);
2205
        }
2206
        return 0;
2207
}
2208
 
2209
 
2210
static const struct atmdev_ops ops = {
2211
        .open           = eni_open,
2212
        .close          = eni_close,
2213
        .ioctl          = eni_ioctl,
2214
        .getsockopt     = eni_getsockopt,
2215
        .setsockopt     = eni_setsockopt,
2216
        .send           = eni_send,
2217
        .phy_put        = eni_phy_put,
2218
        .phy_get        = eni_phy_get,
2219
        .change_qos     = eni_change_qos,
2220
        .proc_read      = eni_proc_read
2221
};
2222
 
2223
 
2224
static int __devinit eni_init_one(struct pci_dev *pci_dev,
2225
    const struct pci_device_id *ent)
2226
{
2227
        struct atm_dev *dev;
2228
        struct eni_dev *eni_dev;
2229
        int error = -ENOMEM;
2230
 
2231
        DPRINTK("eni_init_one\n");
2232
 
2233
        if (pci_enable_device(pci_dev)) {
2234
                error = -EIO;
2235
                goto out0;
2236
        }
2237
 
2238
        eni_dev = kmalloc(sizeof(struct eni_dev),GFP_KERNEL);
2239
        if (!eni_dev) goto out0;
2240
        if (!cpu_zeroes) {
2241
                cpu_zeroes = pci_alloc_consistent(pci_dev,ENI_ZEROES_SIZE,
2242
                    &zeroes);
2243
                if (!cpu_zeroes) goto out1;
2244
        }
2245
        dev = atm_dev_register(DEV_LABEL,&ops,-1,NULL);
2246
        if (!dev) goto out2;
2247
        pci_set_drvdata(pci_dev, dev);
2248
        eni_dev->pci_dev = pci_dev;
2249
        dev->dev_data = eni_dev;
2250
        eni_dev->asic = ent->driver_data;
2251
        error = eni_do_init(dev);
2252
        if (error) goto out3;
2253
        error = eni_start(dev);
2254
        if (error) goto out3;
2255
        eni_dev->more = eni_boards;
2256
        eni_boards = dev;
2257
        return 0;
2258
out3:
2259
        atm_dev_deregister(dev);
2260
out2:
2261
        pci_free_consistent(eni_dev->pci_dev,ENI_ZEROES_SIZE,cpu_zeroes,zeroes);
2262
        cpu_zeroes = NULL;
2263
out1:
2264
        kfree(eni_dev);
2265
out0:
2266
        return error;
2267
}
2268
 
2269
 
2270
static struct pci_device_id eni_pci_tbl[] = {
2271
        { PCI_VENDOR_ID_EF, PCI_DEVICE_ID_EF_ATM_FPGA, PCI_ANY_ID, PCI_ANY_ID,
2272
          0, 0, 0 /* FPGA */ },
2273
        { PCI_VENDOR_ID_EF, PCI_DEVICE_ID_EF_ATM_ASIC, PCI_ANY_ID, PCI_ANY_ID,
2274
          0, 0, 1 /* ASIC */ },
2275
        { 0, }
2276
};
2277
MODULE_DEVICE_TABLE(pci,eni_pci_tbl);
2278
 
2279
 
2280
static void __devexit eni_remove_one(struct pci_dev *pci_dev)
2281
{
2282
        /* grrr */
2283
}
2284
 
2285
 
2286
static struct pci_driver eni_driver = {
2287
        .name           = DEV_LABEL,
2288
        .id_table       = eni_pci_tbl,
2289
        .probe          = eni_init_one,
2290
        .remove         = __devexit_p(eni_remove_one),
2291
};
2292
 
2293
 
2294
static int __init eni_init(void)
2295
{
2296
        struct sk_buff *skb; /* dummy for sizeof */
2297
 
2298
        if (sizeof(skb->cb) < sizeof(struct eni_skb_prv)) {
2299
                printk(KERN_ERR "eni_detect: skb->cb is too small (%Zd < %Zd)\n",
2300
                    sizeof(skb->cb),sizeof(struct eni_skb_prv));
2301
                return -EIO;
2302
        }
2303
        return pci_register_driver(&eni_driver);
2304
}
2305
 
2306
 
2307
module_init(eni_init);
2308
/* @@@ since exit routine not defined, this module can not be unloaded */
2309
 
2310
MODULE_LICENSE("GPL");

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