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Merge remote-tracking branch 'cleancache/linux-next'
[linux-2.6/next.git] / drivers / atm / idt77252.c
blob1f8d724a18bf5932607478e0c89ae6667950fb31
1 /*******************************************************************
2 *
3 * Copyright (c) 2000 ATecoM GmbH
4 *
5 * The author may be reached at ecd@atecom.com.
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 *
12 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
13 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
14 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
15 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
16 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
17 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
18 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
19 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
20 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
21 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
22 *
23 * You should have received a copy of the GNU General Public License along
24 * with this program; if not, write to the Free Software Foundation, Inc.,
25 * 675 Mass Ave, Cambridge, MA 02139, USA.
26 *
27 *******************************************************************/
28
29 #include <linux/module.h>
30 #include <linux/pci.h>
31 #include <linux/poison.h>
32 #include <linux/skbuff.h>
33 #include <linux/kernel.h>
34 #include <linux/vmalloc.h>
35 #include <linux/netdevice.h>
36 #include <linux/atmdev.h>
37 #include <linux/atm.h>
38 #include <linux/delay.h>
39 #include <linux/init.h>
40 #include <linux/bitops.h>
41 #include <linux/wait.h>
42 #include <linux/jiffies.h>
43 #include <linux/mutex.h>
44 #include <linux/slab.h>
45
46 #include <asm/io.h>
47 #include <asm/uaccess.h>
48 #include <asm/atomic.h>
49 #include <asm/byteorder.h>
50
51 #ifdef CONFIG_ATM_IDT77252_USE_SUNI
52 #include "suni.h"
53 #endif /* CONFIG_ATM_IDT77252_USE_SUNI */
54
55
56 #include "idt77252.h"
57 #include "idt77252_tables.h"
58
59 static unsigned int vpibits = 1;
60
61
62 #define ATM_IDT77252_SEND_IDLE 1
63
64
65 /*
66 * Debug HACKs.
67 */
68 #define DEBUG_MODULE 1
69 #undef HAVE_EEPROM /* does not work, yet. */
70
71 #ifdef CONFIG_ATM_IDT77252_DEBUG
72 static unsigned long debug = DBG_GENERAL;
73 #endif
74
75
76 #define SAR_RX_DELAY (SAR_CFG_RXINT_NODELAY)
77
78
79 /*
80 * SCQ Handling.
81 */
82 static struct scq_info *alloc_scq(struct idt77252_dev *, int);
83 static void free_scq(struct idt77252_dev *, struct scq_info *);
84 static int queue_skb(struct idt77252_dev *, struct vc_map *,
85 struct sk_buff *, int oam);
86 static void drain_scq(struct idt77252_dev *, struct vc_map *);
87 static unsigned long get_free_scd(struct idt77252_dev *, struct vc_map *);
88 static void fill_scd(struct idt77252_dev *, struct scq_info *, int);
89
90 /*
91 * FBQ Handling.
92 */
93 static int push_rx_skb(struct idt77252_dev *,
94 struct sk_buff *, int queue);
95 static void recycle_rx_skb(struct idt77252_dev *, struct sk_buff *);
96 static void flush_rx_pool(struct idt77252_dev *, struct rx_pool *);
97 static void recycle_rx_pool_skb(struct idt77252_dev *,
98 struct rx_pool *);
99 static void add_rx_skb(struct idt77252_dev *, int queue,
100 unsigned int size, unsigned int count);
101
102 /*
103 * RSQ Handling.
104 */
105 static int init_rsq(struct idt77252_dev *);
106 static void deinit_rsq(struct idt77252_dev *);
107 static void idt77252_rx(struct idt77252_dev *);
108
109 /*
110 * TSQ handling.
111 */
112 static int init_tsq(struct idt77252_dev *);
113 static void deinit_tsq(struct idt77252_dev *);
114 static void idt77252_tx(struct idt77252_dev *);
115
116
117 /*
118 * ATM Interface.
119 */
120 static void idt77252_dev_close(struct atm_dev *dev);
121 static int idt77252_open(struct atm_vcc *vcc);
122 static void idt77252_close(struct atm_vcc *vcc);
123 static int idt77252_send(struct atm_vcc *vcc, struct sk_buff *skb);
124 static int idt77252_send_oam(struct atm_vcc *vcc, void *cell,
125 int flags);
126 static void idt77252_phy_put(struct atm_dev *dev, unsigned char value,
127 unsigned long addr);
128 static unsigned char idt77252_phy_get(struct atm_dev *dev, unsigned long addr);
129 static int idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos,
130 int flags);
131 static int idt77252_proc_read(struct atm_dev *dev, loff_t * pos,
132 char *page);
133 static void idt77252_softint(struct work_struct *work);
134
135
136 static struct atmdev_ops idt77252_ops =
137 {
138 .dev_close = idt77252_dev_close,
139 .open = idt77252_open,
140 .close = idt77252_close,
141 .send = idt77252_send,
142 .send_oam = idt77252_send_oam,
143 .phy_put = idt77252_phy_put,
144 .phy_get = idt77252_phy_get,
145 .change_qos = idt77252_change_qos,
146 .proc_read = idt77252_proc_read,
147 .owner = THIS_MODULE
148 };
149
150 static struct idt77252_dev *idt77252_chain = NULL;
151 static unsigned int idt77252_sram_write_errors = 0;
152
153 /*****************************************************************************/
154 /* */
155 /* I/O and Utility Bus */
156 /* */
157 /*****************************************************************************/
158
159 static void
160 waitfor_idle(struct idt77252_dev *card)
161 {
162 u32 stat;
163
164 stat = readl(SAR_REG_STAT);
165 while (stat & SAR_STAT_CMDBZ)
166 stat = readl(SAR_REG_STAT);
167 }
168
169 static u32
170 read_sram(struct idt77252_dev *card, unsigned long addr)
171 {
172 unsigned long flags;
173 u32 value;
174
175 spin_lock_irqsave(&card->cmd_lock, flags);
176 writel(SAR_CMD_READ_SRAM | (addr << 2), SAR_REG_CMD);
177 waitfor_idle(card);
178 value = readl(SAR_REG_DR0);
179 spin_unlock_irqrestore(&card->cmd_lock, flags);
180 return value;
181 }
182
183 static void
184 write_sram(struct idt77252_dev *card, unsigned long addr, u32 value)
185 {
186 unsigned long flags;
187
188 if ((idt77252_sram_write_errors == 0) &&
189 (((addr > card->tst[0] + card->tst_size - 2) &&
190 (addr < card->tst[0] + card->tst_size)) ||
191 ((addr > card->tst[1] + card->tst_size - 2) &&
192 (addr < card->tst[1] + card->tst_size)))) {
193 printk("%s: ERROR: TST JMP section at %08lx written: %08x\n",
194 card->name, addr, value);
195 }
196
197 spin_lock_irqsave(&card->cmd_lock, flags);
198 writel(value, SAR_REG_DR0);
199 writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD);
200 waitfor_idle(card);
201 spin_unlock_irqrestore(&card->cmd_lock, flags);
202 }
203
204 static u8
205 read_utility(void *dev, unsigned long ubus_addr)
206 {
207 struct idt77252_dev *card = dev;
208 unsigned long flags;
209 u8 value;
210
211 if (!card) {
212 printk("Error: No such device.\n");
213 return -1;
214 }
215
216 spin_lock_irqsave(&card->cmd_lock, flags);
217 writel(SAR_CMD_READ_UTILITY + ubus_addr, SAR_REG_CMD);
218 waitfor_idle(card);
219 value = readl(SAR_REG_DR0);
220 spin_unlock_irqrestore(&card->cmd_lock, flags);
221 return value;
222 }
223
224 static void
225 write_utility(void *dev, unsigned long ubus_addr, u8 value)
226 {
227 struct idt77252_dev *card = dev;
228 unsigned long flags;
229
230 if (!card) {
231 printk("Error: No such device.\n");
232 return;
233 }
234
235 spin_lock_irqsave(&card->cmd_lock, flags);
236 writel((u32) value, SAR_REG_DR0);
237 writel(SAR_CMD_WRITE_UTILITY + ubus_addr, SAR_REG_CMD);
238 waitfor_idle(card);
239 spin_unlock_irqrestore(&card->cmd_lock, flags);
240 }
241
242 #ifdef HAVE_EEPROM
243 static u32 rdsrtab[] =
244 {
245 SAR_GP_EECS | SAR_GP_EESCLK,
246 0,
247 SAR_GP_EESCLK, /* 0 */
248 0,
249 SAR_GP_EESCLK, /* 0 */
250 0,
251 SAR_GP_EESCLK, /* 0 */
252 0,
253 SAR_GP_EESCLK, /* 0 */
254 0,
255 SAR_GP_EESCLK, /* 0 */
256 SAR_GP_EEDO,
257 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
258 0,
259 SAR_GP_EESCLK, /* 0 */
260 SAR_GP_EEDO,
261 SAR_GP_EESCLK | SAR_GP_EEDO /* 1 */
262 };
263
264 static u32 wrentab[] =
265 {
266 SAR_GP_EECS | SAR_GP_EESCLK,
267 0,
268 SAR_GP_EESCLK, /* 0 */
269 0,
270 SAR_GP_EESCLK, /* 0 */
271 0,
272 SAR_GP_EESCLK, /* 0 */
273 0,
274 SAR_GP_EESCLK, /* 0 */
275 SAR_GP_EEDO,
276 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
277 SAR_GP_EEDO,
278 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
279 0,
280 SAR_GP_EESCLK, /* 0 */
281 0,
282 SAR_GP_EESCLK /* 0 */
283 };
284
285 static u32 rdtab[] =
286 {
287 SAR_GP_EECS | SAR_GP_EESCLK,
288 0,
289 SAR_GP_EESCLK, /* 0 */
290 0,
291 SAR_GP_EESCLK, /* 0 */
292 0,
293 SAR_GP_EESCLK, /* 0 */
294 0,
295 SAR_GP_EESCLK, /* 0 */
296 0,
297 SAR_GP_EESCLK, /* 0 */
298 0,
299 SAR_GP_EESCLK, /* 0 */
300 SAR_GP_EEDO,
301 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
302 SAR_GP_EEDO,
303 SAR_GP_EESCLK | SAR_GP_EEDO /* 1 */
304 };
305
306 static u32 wrtab[] =
307 {
308 SAR_GP_EECS | SAR_GP_EESCLK,
309 0,
310 SAR_GP_EESCLK, /* 0 */
311 0,
312 SAR_GP_EESCLK, /* 0 */
313 0,
314 SAR_GP_EESCLK, /* 0 */
315 0,
316 SAR_GP_EESCLK, /* 0 */
317 0,
318 SAR_GP_EESCLK, /* 0 */
319 0,
320 SAR_GP_EESCLK, /* 0 */
321 SAR_GP_EEDO,
322 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
323 0,
324 SAR_GP_EESCLK /* 0 */
325 };
326
327 static u32 clktab[] =
328 {
329 0,
330 SAR_GP_EESCLK,
331 0,
332 SAR_GP_EESCLK,
333 0,
334 SAR_GP_EESCLK,
335 0,
336 SAR_GP_EESCLK,
337 0,
338 SAR_GP_EESCLK,
339 0,
340 SAR_GP_EESCLK,
341 0,
342 SAR_GP_EESCLK,
343 0,
344 SAR_GP_EESCLK,
345 0
346 };
347
348 static u32
349 idt77252_read_gp(struct idt77252_dev *card)
350 {
351 u32 gp;
352
353 gp = readl(SAR_REG_GP);
354 #if 0
355 printk("RD: %s\n", gp & SAR_GP_EEDI ? "1" : "0");
356 #endif
357 return gp;
358 }
359
360 static void
361 idt77252_write_gp(struct idt77252_dev *card, u32 value)
362 {
363 unsigned long flags;
364
365 #if 0
366 printk("WR: %s %s %s\n", value & SAR_GP_EECS ? " " : "/CS",
367 value & SAR_GP_EESCLK ? "HIGH" : "LOW ",
368 value & SAR_GP_EEDO ? "1" : "0");
369 #endif
370
371 spin_lock_irqsave(&card->cmd_lock, flags);
372 waitfor_idle(card);
373 writel(value, SAR_REG_GP);
374 spin_unlock_irqrestore(&card->cmd_lock, flags);
375 }
376
377 static u8
378 idt77252_eeprom_read_status(struct idt77252_dev *card)
379 {
380 u8 byte;
381 u32 gp;
382 int i, j;
383
384 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
385
386 for (i = 0; i < ARRAY_SIZE(rdsrtab); i++) {
387 idt77252_write_gp(card, gp | rdsrtab[i]);
388 udelay(5);
389 }
390 idt77252_write_gp(card, gp | SAR_GP_EECS);
391 udelay(5);
392
393 byte = 0;
394 for (i = 0, j = 0; i < 8; i++) {
395 byte <<= 1;
396
397 idt77252_write_gp(card, gp | clktab[j++]);
398 udelay(5);
399
400 byte |= idt77252_read_gp(card) & SAR_GP_EEDI ? 1 : 0;
401
402 idt77252_write_gp(card, gp | clktab[j++]);
403 udelay(5);
404 }
405 idt77252_write_gp(card, gp | SAR_GP_EECS);
406 udelay(5);
407
408 return byte;
409 }
410
411 static u8
412 idt77252_eeprom_read_byte(struct idt77252_dev *card, u8 offset)
413 {
414 u8 byte;
415 u32 gp;
416 int i, j;
417
418 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
419
420 for (i = 0; i < ARRAY_SIZE(rdtab); i++) {
421 idt77252_write_gp(card, gp | rdtab[i]);
422 udelay(5);
423 }
424 idt77252_write_gp(card, gp | SAR_GP_EECS);
425 udelay(5);
426
427 for (i = 0, j = 0; i < 8; i++) {
428 idt77252_write_gp(card, gp | clktab[j++] |
429 (offset & 1 ? SAR_GP_EEDO : 0));
430 udelay(5);
431
432 idt77252_write_gp(card, gp | clktab[j++] |
433 (offset & 1 ? SAR_GP_EEDO : 0));
434 udelay(5);
435
436 offset >>= 1;
437 }
438 idt77252_write_gp(card, gp | SAR_GP_EECS);
439 udelay(5);
440
441 byte = 0;
442 for (i = 0, j = 0; i < 8; i++) {
443 byte <<= 1;
444
445 idt77252_write_gp(card, gp | clktab[j++]);
446 udelay(5);
447
448 byte |= idt77252_read_gp(card) & SAR_GP_EEDI ? 1 : 0;
449
450 idt77252_write_gp(card, gp | clktab[j++]);
451 udelay(5);
452 }
453 idt77252_write_gp(card, gp | SAR_GP_EECS);
454 udelay(5);
455
456 return byte;
457 }
458
459 static void
460 idt77252_eeprom_write_byte(struct idt77252_dev *card, u8 offset, u8 data)
461 {
462 u32 gp;
463 int i, j;
464
465 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
466
467 for (i = 0; i < ARRAY_SIZE(wrentab); i++) {
468 idt77252_write_gp(card, gp | wrentab[i]);
469 udelay(5);
470 }
471 idt77252_write_gp(card, gp | SAR_GP_EECS);
472 udelay(5);
473
474 for (i = 0; i < ARRAY_SIZE(wrtab); i++) {
475 idt77252_write_gp(card, gp | wrtab[i]);
476 udelay(5);
477 }
478 idt77252_write_gp(card, gp | SAR_GP_EECS);
479 udelay(5);
480
481 for (i = 0, j = 0; i < 8; i++) {
482 idt77252_write_gp(card, gp | clktab[j++] |
483 (offset & 1 ? SAR_GP_EEDO : 0));
484 udelay(5);
485
486 idt77252_write_gp(card, gp | clktab[j++] |
487 (offset & 1 ? SAR_GP_EEDO : 0));
488 udelay(5);
489
490 offset >>= 1;
491 }
492 idt77252_write_gp(card, gp | SAR_GP_EECS);
493 udelay(5);
494
495 for (i = 0, j = 0; i < 8; i++) {
496 idt77252_write_gp(card, gp | clktab[j++] |
497 (data & 1 ? SAR_GP_EEDO : 0));
498 udelay(5);
499
500 idt77252_write_gp(card, gp | clktab[j++] |
501 (data & 1 ? SAR_GP_EEDO : 0));
502 udelay(5);
503
504 data >>= 1;
505 }
506 idt77252_write_gp(card, gp | SAR_GP_EECS);
507 udelay(5);
508 }
509
510 static void
511 idt77252_eeprom_init(struct idt77252_dev *card)
512 {
513 u32 gp;
514
515 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
516
517 idt77252_write_gp(card, gp | SAR_GP_EECS | SAR_GP_EESCLK);
518 udelay(5);
519 idt77252_write_gp(card, gp | SAR_GP_EECS);
520 udelay(5);
521 idt77252_write_gp(card, gp | SAR_GP_EECS | SAR_GP_EESCLK);
522 udelay(5);
523 idt77252_write_gp(card, gp | SAR_GP_EECS);
524 udelay(5);
525 }
526 #endif /* HAVE_EEPROM */
527
528
529 #ifdef CONFIG_ATM_IDT77252_DEBUG
530 static void
531 dump_tct(struct idt77252_dev *card, int index)
532 {
533 unsigned long tct;
534 int i;
535
536 tct = (unsigned long) (card->tct_base + index * SAR_SRAM_TCT_SIZE);
537
538 printk("%s: TCT %x:", card->name, index);
539 for (i = 0; i < 8; i++) {
540 printk(" %08x", read_sram(card, tct + i));
541 }
542 printk("\n");
543 }
544
545 static void
546 idt77252_tx_dump(struct idt77252_dev *card)
547 {
548 struct atm_vcc *vcc;
549 struct vc_map *vc;
550 int i;
551
552 printk("%s\n", __func__);
553 for (i = 0; i < card->tct_size; i++) {
554 vc = card->vcs[i];
555 if (!vc)
556 continue;
557
558 vcc = NULL;
559 if (vc->rx_vcc)
560 vcc = vc->rx_vcc;
561 else if (vc->tx_vcc)
562 vcc = vc->tx_vcc;
563
564 if (!vcc)
565 continue;
566
567 printk("%s: Connection %d:\n", card->name, vc->index);
568 dump_tct(card, vc->index);
569 }
570 }
571 #endif
572
573
574 /*****************************************************************************/
575 /* */
576 /* SCQ Handling */
577 /* */
578 /*****************************************************************************/
579
580 static int
581 sb_pool_add(struct idt77252_dev *card, struct sk_buff *skb, int queue)
582 {
583 struct sb_pool *pool = &card->sbpool[queue];
584 int index;
585
586 index = pool->index;
587 while (pool->skb[index]) {
588 index = (index + 1) & FBQ_MASK;
589 if (index == pool->index)
590 return -ENOBUFS;
591 }
592
593 pool->skb[index] = skb;
594 IDT77252_PRV_POOL(skb) = POOL_HANDLE(queue, index);
595
596 pool->index = (index + 1) & FBQ_MASK;
597 return 0;
598 }
599
600 static void
601 sb_pool_remove(struct idt77252_dev *card, struct sk_buff *skb)
602 {
603 unsigned int queue, index;
604 u32 handle;
605
606 handle = IDT77252_PRV_POOL(skb);
607
608 queue = POOL_QUEUE(handle);
609 if (queue > 3)
610 return;
611
612 index = POOL_INDEX(handle);
613 if (index > FBQ_SIZE - 1)
614 return;
615
616 card->sbpool[queue].skb[index] = NULL;
617 }
618
619 static struct sk_buff *
620 sb_pool_skb(struct idt77252_dev *card, u32 handle)
621 {
622 unsigned int queue, index;
623
624 queue = POOL_QUEUE(handle);
625 if (queue > 3)
626 return NULL;
627
628 index = POOL_INDEX(handle);
629 if (index > FBQ_SIZE - 1)
630 return NULL;
631
632 return card->sbpool[queue].skb[index];
633 }
634
635 static struct scq_info *
636 alloc_scq(struct idt77252_dev *card, int class)
637 {
638 struct scq_info *scq;
639
640 scq = kzalloc(sizeof(struct scq_info), GFP_KERNEL);
641 if (!scq)
642 return NULL;
643 scq->base = pci_alloc_consistent(card->pcidev, SCQ_SIZE,
644 &scq->paddr);
645 if (scq->base == NULL) {
646 kfree(scq);
647 return NULL;
648 }
649 memset(scq->base, 0, SCQ_SIZE);
650
651 scq->next = scq->base;
652 scq->last = scq->base + (SCQ_ENTRIES - 1);
653 atomic_set(&scq->used, 0);
654
655 spin_lock_init(&scq->lock);
656 spin_lock_init(&scq->skblock);
657
658 skb_queue_head_init(&scq->transmit);
659 skb_queue_head_init(&scq->pending);
660
661 TXPRINTK("idt77252: SCQ: base 0x%p, next 0x%p, last 0x%p, paddr %08llx\n",
662 scq->base, scq->next, scq->last, (unsigned long long)scq->paddr);
663
664 return scq;
665 }
666
667 static void
668 free_scq(struct idt77252_dev *card, struct scq_info *scq)
669 {
670 struct sk_buff *skb;
671 struct atm_vcc *vcc;
672
673 pci_free_consistent(card->pcidev, SCQ_SIZE,
674 scq->base, scq->paddr);
675
676 while ((skb = skb_dequeue(&scq->transmit))) {
677 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
678 skb->len, PCI_DMA_TODEVICE);
679
680 vcc = ATM_SKB(skb)->vcc;
681 if (vcc->pop)
682 vcc->pop(vcc, skb);
683 else
684 dev_kfree_skb(skb);
685 }
686
687 while ((skb = skb_dequeue(&scq->pending))) {
688 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
689 skb->len, PCI_DMA_TODEVICE);
690
691 vcc = ATM_SKB(skb)->vcc;
692 if (vcc->pop)
693 vcc->pop(vcc, skb);
694 else
695 dev_kfree_skb(skb);
696 }
697
698 kfree(scq);
699 }
700
701
702 static int
703 push_on_scq(struct idt77252_dev *card, struct vc_map *vc, struct sk_buff *skb)
704 {
705 struct scq_info *scq = vc->scq;
706 unsigned long flags;
707 struct scqe *tbd;
708 int entries;
709
710 TXPRINTK("%s: SCQ: next 0x%p\n", card->name, scq->next);
711
712 atomic_inc(&scq->used);
713 entries = atomic_read(&scq->used);
714 if (entries > (SCQ_ENTRIES - 1)) {
715 atomic_dec(&scq->used);
716 goto out;
717 }
718
719 skb_queue_tail(&scq->transmit, skb);
720
721 spin_lock_irqsave(&vc->lock, flags);
722 if (vc->estimator) {
723 struct atm_vcc *vcc = vc->tx_vcc;
724 struct sock *sk = sk_atm(vcc);
725
726 vc->estimator->cells += (skb->len + 47) / 48;
727 if (atomic_read(&sk->sk_wmem_alloc) >
728 (sk->sk_sndbuf >> 1)) {
729 u32 cps = vc->estimator->maxcps;
730
731 vc->estimator->cps = cps;
732 vc->estimator->avcps = cps << 5;
733 if (vc->lacr < vc->init_er) {
734 vc->lacr = vc->init_er;
735 writel(TCMDQ_LACR | (vc->lacr << 16) |
736 vc->index, SAR_REG_TCMDQ);
737 }
738 }
739 }
740 spin_unlock_irqrestore(&vc->lock, flags);
741
742 tbd = &IDT77252_PRV_TBD(skb);
743
744 spin_lock_irqsave(&scq->lock, flags);
745 scq->next->word_1 = cpu_to_le32(tbd->word_1 |
746 SAR_TBD_TSIF | SAR_TBD_GTSI);
747 scq->next->word_2 = cpu_to_le32(tbd->word_2);
748 scq->next->word_3 = cpu_to_le32(tbd->word_3);
749 scq->next->word_4 = cpu_to_le32(tbd->word_4);
750
751 if (scq->next == scq->last)
752 scq->next = scq->base;
753 else
754 scq->next++;
755
756 write_sram(card, scq->scd,
757 scq->paddr +
758 (u32)((unsigned long)scq->next - (unsigned long)scq->base));
759 spin_unlock_irqrestore(&scq->lock, flags);
760
761 scq->trans_start = jiffies;
762
763 if (test_and_clear_bit(VCF_IDLE, &vc->flags)) {
764 writel(TCMDQ_START_LACR | (vc->lacr << 16) | vc->index,
765 SAR_REG_TCMDQ);
766 }
767
768 TXPRINTK("%d entries in SCQ used (push).\n", atomic_read(&scq->used));
769
770 XPRINTK("%s: SCQ (after push %2d) head = 0x%x, next = 0x%p.\n",
771 card->name, atomic_read(&scq->used),
772 read_sram(card, scq->scd + 1), scq->next);
773
774 return 0;
775
776 out:
777 if (time_after(jiffies, scq->trans_start + HZ)) {
778 printk("%s: Error pushing TBD for %d.%d\n",
779 card->name, vc->tx_vcc->vpi, vc->tx_vcc->vci);
780 #ifdef CONFIG_ATM_IDT77252_DEBUG
781 idt77252_tx_dump(card);
782 #endif
783 scq->trans_start = jiffies;
784 }
785
786 return -ENOBUFS;
787 }
788
789
790 static void
791 drain_scq(struct idt77252_dev *card, struct vc_map *vc)
792 {
793 struct scq_info *scq = vc->scq;
794 struct sk_buff *skb;
795 struct atm_vcc *vcc;
796
797 TXPRINTK("%s: SCQ (before drain %2d) next = 0x%p.\n",
798 card->name, atomic_read(&scq->used), scq->next);
799
800 skb = skb_dequeue(&scq->transmit);
801 if (skb) {
802 TXPRINTK("%s: freeing skb at %p.\n", card->name, skb);
803
804 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
805 skb->len, PCI_DMA_TODEVICE);
806
807 vcc = ATM_SKB(skb)->vcc;
808
809 if (vcc->pop)
810 vcc->pop(vcc, skb);
811 else
812 dev_kfree_skb(skb);
813
814 atomic_inc(&vcc->stats->tx);
815 }
816
817 atomic_dec(&scq->used);
818
819 spin_lock(&scq->skblock);
820 while ((skb = skb_dequeue(&scq->pending))) {
821 if (push_on_scq(card, vc, skb)) {
822 skb_queue_head(&vc->scq->pending, skb);
823 break;
824 }
825 }
826 spin_unlock(&scq->skblock);
827 }
828
829 static int
830 queue_skb(struct idt77252_dev *card, struct vc_map *vc,
831 struct sk_buff *skb, int oam)
832 {
833 struct atm_vcc *vcc;
834 struct scqe *tbd;
835 unsigned long flags;
836 int error;
837 int aal;
838
839 if (skb->len == 0) {
840 printk("%s: invalid skb->len (%d)\n", card->name, skb->len);
841 return -EINVAL;
842 }
843
844 TXPRINTK("%s: Sending %d bytes of data.\n",
845 card->name, skb->len);
846
847 tbd = &IDT77252_PRV_TBD(skb);
848 vcc = ATM_SKB(skb)->vcc;
849
850 IDT77252_PRV_PADDR(skb) = pci_map_single(card->pcidev, skb->data,
851 skb->len, PCI_DMA_TODEVICE);
852
853 error = -EINVAL;
854
855 if (oam) {
856 if (skb->len != 52)
857 goto errout;
858
859 tbd->word_1 = SAR_TBD_OAM | ATM_CELL_PAYLOAD | SAR_TBD_EPDU;
860 tbd->word_2 = IDT77252_PRV_PADDR(skb) + 4;
861 tbd->word_3 = 0x00000000;
862 tbd->word_4 = (skb->data[0] << 24) | (skb->data[1] << 16) |
863 (skb->data[2] << 8) | (skb->data[3] << 0);
864
865 if (test_bit(VCF_RSV, &vc->flags))
866 vc = card->vcs[0];
867
868 goto done;
869 }
870
871 if (test_bit(VCF_RSV, &vc->flags)) {
872 printk("%s: Trying to transmit on reserved VC\n", card->name);
873 goto errout;
874 }
875
876 aal = vcc->qos.aal;
877
878 switch (aal) {
879 case ATM_AAL0:
880 case ATM_AAL34:
881 if (skb->len > 52)
882 goto errout;
883
884 if (aal == ATM_AAL0)
885 tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL0 |
886 ATM_CELL_PAYLOAD;
887 else
888 tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL34 |
889 ATM_CELL_PAYLOAD;
890
891 tbd->word_2 = IDT77252_PRV_PADDR(skb) + 4;
892 tbd->word_3 = 0x00000000;
893 tbd->word_4 = (skb->data[0] << 24) | (skb->data[1] << 16) |
894 (skb->data[2] << 8) | (skb->data[3] << 0);
895 break;
896
897 case ATM_AAL5:
898 tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL5 | skb->len;
899 tbd->word_2 = IDT77252_PRV_PADDR(skb);
900 tbd->word_3 = skb->len;
901 tbd->word_4 = (vcc->vpi << SAR_TBD_VPI_SHIFT) |
902 (vcc->vci << SAR_TBD_VCI_SHIFT);
903 break;
904
905 case ATM_AAL1:
906 case ATM_AAL2:
907 default:
908 printk("%s: Traffic type not supported.\n", card->name);
909 error = -EPROTONOSUPPORT;
910 goto errout;
911 }
912
913 done:
914 spin_lock_irqsave(&vc->scq->skblock, flags);
915 skb_queue_tail(&vc->scq->pending, skb);
916
917 while ((skb = skb_dequeue(&vc->scq->pending))) {
918 if (push_on_scq(card, vc, skb)) {
919 skb_queue_head(&vc->scq->pending, skb);
920 break;
921 }
922 }
923 spin_unlock_irqrestore(&vc->scq->skblock, flags);
924
925 return 0;
926
927 errout:
928 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
929 skb->len, PCI_DMA_TODEVICE);
930 return error;
931 }
932
933 static unsigned long
934 get_free_scd(struct idt77252_dev *card, struct vc_map *vc)
935 {
936 int i;
937
938 for (i = 0; i < card->scd_size; i++) {
939 if (!card->scd2vc[i]) {
940 card->scd2vc[i] = vc;
941 vc->scd_index = i;
942 return card->scd_base + i * SAR_SRAM_SCD_SIZE;
943 }
944 }
945 return 0;
946 }
947
948 static void
949 fill_scd(struct idt77252_dev *card, struct scq_info *scq, int class)
950 {
951 write_sram(card, scq->scd, scq->paddr);
952 write_sram(card, scq->scd + 1, 0x00000000);
953 write_sram(card, scq->scd + 2, 0xffffffff);
954 write_sram(card, scq->scd + 3, 0x00000000);
955 }
956
957 static void
958 clear_scd(struct idt77252_dev *card, struct scq_info *scq, int class)
959 {
960 return;
961 }
962
963 /*****************************************************************************/
964 /* */
965 /* RSQ Handling */
966 /* */
967 /*****************************************************************************/
968
969 static int
970 init_rsq(struct idt77252_dev *card)
971 {
972 struct rsq_entry *rsqe;
973
974 card->rsq.base = pci_alloc_consistent(card->pcidev, RSQSIZE,
975 &card->rsq.paddr);
976 if (card->rsq.base == NULL) {
977 printk("%s: can't allocate RSQ.\n", card->name);
978 return -1;
979 }
980 memset(card->rsq.base, 0, RSQSIZE);
981
982 card->rsq.last = card->rsq.base + RSQ_NUM_ENTRIES - 1;
983 card->rsq.next = card->rsq.last;
984 for (rsqe = card->rsq.base; rsqe <= card->rsq.last; rsqe++)
985 rsqe->word_4 = 0;
986
987 writel((unsigned long) card->rsq.last - (unsigned long) card->rsq.base,
988 SAR_REG_RSQH);
989 writel(card->rsq.paddr, SAR_REG_RSQB);
990
991 IPRINTK("%s: RSQ base at 0x%lx (0x%x).\n", card->name,
992 (unsigned long) card->rsq.base,
993 readl(SAR_REG_RSQB));
994 IPRINTK("%s: RSQ head = 0x%x, base = 0x%x, tail = 0x%x.\n",
995 card->name,
996 readl(SAR_REG_RSQH),
997 readl(SAR_REG_RSQB),
998 readl(SAR_REG_RSQT));
999
1000 return 0;
1001 }
1002
1003 static void
1004 deinit_rsq(struct idt77252_dev *card)
1005 {
1006 pci_free_consistent(card->pcidev, RSQSIZE,
1007 card->rsq.base, card->rsq.paddr);
1008 }
1009
1010 static void
1011 dequeue_rx(struct idt77252_dev *card, struct rsq_entry *rsqe)
1012 {
1013 struct atm_vcc *vcc;
1014 struct sk_buff *skb;
1015 struct rx_pool *rpp;
1016 struct vc_map *vc;
1017 u32 header, vpi, vci;
1018 u32 stat;
1019 int i;
1020
1021 stat = le32_to_cpu(rsqe->word_4);
1022
1023 if (stat & SAR_RSQE_IDLE) {
1024 RXPRINTK("%s: message about inactive connection.\n",
1025 card->name);
1026 return;
1027 }
1028
1029 skb = sb_pool_skb(card, le32_to_cpu(rsqe->word_2));
1030 if (skb == NULL) {
1031 printk("%s: NULL skb in %s, rsqe: %08x %08x %08x %08x\n",
1032 card->name, __func__,
1033 le32_to_cpu(rsqe->word_1), le32_to_cpu(rsqe->word_2),
1034 le32_to_cpu(rsqe->word_3), le32_to_cpu(rsqe->word_4));
1035 return;
1036 }
1037
1038 header = le32_to_cpu(rsqe->word_1);
1039 vpi = (header >> 16) & 0x00ff;
1040 vci = (header >> 0) & 0xffff;
1041
1042 RXPRINTK("%s: SDU for %d.%d received in buffer 0x%p (data 0x%p).\n",
1043 card->name, vpi, vci, skb, skb->data);
1044
1045 if ((vpi >= (1 << card->vpibits)) || (vci != (vci & card->vcimask))) {
1046 printk("%s: SDU received for out-of-range vc %u.%u\n",
1047 card->name, vpi, vci);
1048 recycle_rx_skb(card, skb);
1049 return;
1050 }
1051
1052 vc = card->vcs[VPCI2VC(card, vpi, vci)];
1053 if (!vc || !test_bit(VCF_RX, &vc->flags)) {
1054 printk("%s: SDU received on non RX vc %u.%u\n",
1055 card->name, vpi, vci);
1056 recycle_rx_skb(card, skb);
1057 return;
1058 }
1059
1060 vcc = vc->rx_vcc;
1061
1062 pci_dma_sync_single_for_cpu(card->pcidev, IDT77252_PRV_PADDR(skb),
1063 skb_end_pointer(skb) - skb->data,
1064 PCI_DMA_FROMDEVICE);
1065
1066 if ((vcc->qos.aal == ATM_AAL0) ||
1067 (vcc->qos.aal == ATM_AAL34)) {
1068 struct sk_buff *sb;
1069 unsigned char *cell;
1070 u32 aal0;
1071
1072 cell = skb->data;
1073 for (i = (stat & SAR_RSQE_CELLCNT); i; i--) {
1074 if ((sb = dev_alloc_skb(64)) == NULL) {
1075 printk("%s: Can't allocate buffers for aal0.\n",
1076 card->name);
1077 atomic_add(i, &vcc->stats->rx_drop);
1078 break;
1079 }
1080 if (!atm_charge(vcc, sb->truesize)) {
1081 RXPRINTK("%s: atm_charge() dropped aal0 packets.\n",
1082 card->name);
1083 atomic_add(i - 1, &vcc->stats->rx_drop);
1084 dev_kfree_skb(sb);
1085 break;
1086 }
1087 aal0 = (vpi << ATM_HDR_VPI_SHIFT) |
1088 (vci << ATM_HDR_VCI_SHIFT);
1089 aal0 |= (stat & SAR_RSQE_EPDU) ? 0x00000002 : 0;
1090 aal0 |= (stat & SAR_RSQE_CLP) ? 0x00000001 : 0;
1091
1092 *((u32 *) sb->data) = aal0;
1093 skb_put(sb, sizeof(u32));
1094 memcpy(skb_put(sb, ATM_CELL_PAYLOAD),
1095 cell, ATM_CELL_PAYLOAD);
1096
1097 ATM_SKB(sb)->vcc = vcc;
1098 __net_timestamp(sb);
1099 vcc->push(vcc, sb);
1100 atomic_inc(&vcc->stats->rx);
1101
1102 cell += ATM_CELL_PAYLOAD;
1103 }
1104
1105 recycle_rx_skb(card, skb);
1106 return;
1107 }
1108 if (vcc->qos.aal != ATM_AAL5) {
1109 printk("%s: Unexpected AAL type in dequeue_rx(): %d.\n",
1110 card->name, vcc->qos.aal);
1111 recycle_rx_skb(card, skb);
1112 return;
1113 }
1114 skb->len = (stat & SAR_RSQE_CELLCNT) * ATM_CELL_PAYLOAD;
1115
1116 rpp = &vc->rcv.rx_pool;
1117
1118 __skb_queue_tail(&rpp->queue, skb);
1119 rpp->len += skb->len;
1120
1121 if (stat & SAR_RSQE_EPDU) {
1122 unsigned char *l1l2;
1123 unsigned int len;
1124
1125 l1l2 = (unsigned char *) ((unsigned long) skb->data + skb->len - 6);
1126
1127 len = (l1l2[0] << 8) | l1l2[1];
1128 len = len ? len : 0x10000;
1129
1130 RXPRINTK("%s: PDU has %d bytes.\n", card->name, len);
1131
1132 if ((len + 8 > rpp->len) || (len + (47 + 8) < rpp->len)) {
1133 RXPRINTK("%s: AAL5 PDU size mismatch: %d != %d. "
1134 "(CDC: %08x)\n",
1135 card->name, len, rpp->len, readl(SAR_REG_CDC));
1136 recycle_rx_pool_skb(card, rpp);
1137 atomic_inc(&vcc->stats->rx_err);
1138 return;
1139 }
1140 if (stat & SAR_RSQE_CRC) {
1141 RXPRINTK("%s: AAL5 CRC error.\n", card->name);
1142 recycle_rx_pool_skb(card, rpp);
1143 atomic_inc(&vcc->stats->rx_err);
1144 return;
1145 }
1146 if (skb_queue_len(&rpp->queue) > 1) {
1147 struct sk_buff *sb;
1148
1149 skb = dev_alloc_skb(rpp->len);
1150 if (!skb) {
1151 RXPRINTK("%s: Can't alloc RX skb.\n",
1152 card->name);
1153 recycle_rx_pool_skb(card, rpp);
1154 atomic_inc(&vcc->stats->rx_err);
1155 return;
1156 }
1157 if (!atm_charge(vcc, skb->truesize)) {
1158 recycle_rx_pool_skb(card, rpp);
1159 dev_kfree_skb(skb);
1160 return;
1161 }
1162 skb_queue_walk(&rpp->queue, sb)
1163 memcpy(skb_put(skb, sb->len),
1164 sb->data, sb->len);
1165
1166 recycle_rx_pool_skb(card, rpp);
1167
1168 skb_trim(skb, len);
1169 ATM_SKB(skb)->vcc = vcc;
1170 __net_timestamp(skb);
1171
1172 vcc->push(vcc, skb);
1173 atomic_inc(&vcc->stats->rx);
1174
1175 return;
1176 }
1177
1178 flush_rx_pool(card, rpp);
1179
1180 if (!atm_charge(vcc, skb->truesize)) {
1181 recycle_rx_skb(card, skb);
1182 return;
1183 }
1184
1185 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
1186 skb_end_pointer(skb) - skb->data,
1187 PCI_DMA_FROMDEVICE);
1188 sb_pool_remove(card, skb);
1189
1190 skb_trim(skb, len);
1191 ATM_SKB(skb)->vcc = vcc;
1192 __net_timestamp(skb);
1193
1194 vcc->push(vcc, skb);
1195 atomic_inc(&vcc->stats->rx);
1196
1197 if (skb->truesize > SAR_FB_SIZE_3)
1198 add_rx_skb(card, 3, SAR_FB_SIZE_3, 1);
1199 else if (skb->truesize > SAR_FB_SIZE_2)
1200 add_rx_skb(card, 2, SAR_FB_SIZE_2, 1);
1201 else if (skb->truesize > SAR_FB_SIZE_1)
1202 add_rx_skb(card, 1, SAR_FB_SIZE_1, 1);
1203 else
1204 add_rx_skb(card, 0, SAR_FB_SIZE_0, 1);
1205 return;
1206 }
1207 }
1208
1209 static void
1210 idt77252_rx(struct idt77252_dev *card)
1211 {
1212 struct rsq_entry *rsqe;
1213
1214 if (card->rsq.next == card->rsq.last)
1215 rsqe = card->rsq.base;
1216 else
1217 rsqe = card->rsq.next + 1;
1218
1219 if (!(le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID)) {
1220 RXPRINTK("%s: no entry in RSQ.\n", card->name);
1221 return;
1222 }
1223
1224 do {
1225 dequeue_rx(card, rsqe);
1226 rsqe->word_4 = 0;
1227 card->rsq.next = rsqe;
1228 if (card->rsq.next == card->rsq.last)
1229 rsqe = card->rsq.base;
1230 else
1231 rsqe = card->rsq.next + 1;
1232 } while (le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID);
1233
1234 writel((unsigned long) card->rsq.next - (unsigned long) card->rsq.base,
1235 SAR_REG_RSQH);
1236 }
1237
1238 static void
1239 idt77252_rx_raw(struct idt77252_dev *card)
1240 {
1241 struct sk_buff *queue;
1242 u32 head, tail;
1243 struct atm_vcc *vcc;
1244 struct vc_map *vc;
1245 struct sk_buff *sb;
1246
1247 if (card->raw_cell_head == NULL) {
1248 u32 handle = le32_to_cpu(*(card->raw_cell_hnd + 1));
1249 card->raw_cell_head = sb_pool_skb(card, handle);
1250 }
1251
1252 queue = card->raw_cell_head;
1253 if (!queue)
1254 return;
1255
1256 head = IDT77252_PRV_PADDR(queue) + (queue->data - queue->head - 16);
1257 tail = readl(SAR_REG_RAWCT);
1258
1259 pci_dma_sync_single_for_cpu(card->pcidev, IDT77252_PRV_PADDR(queue),
1260 skb_end_pointer(queue) - queue->head - 16,
1261 PCI_DMA_FROMDEVICE);
1262
1263 while (head != tail) {
1264 unsigned int vpi, vci;
1265 u32 header;
1266
1267 header = le32_to_cpu(*(u32 *) &queue->data[0]);
1268
1269 vpi = (header & ATM_HDR_VPI_MASK) >> ATM_HDR_VPI_SHIFT;
1270 vci = (header & ATM_HDR_VCI_MASK) >> ATM_HDR_VCI_SHIFT;
1271
1272 #ifdef CONFIG_ATM_IDT77252_DEBUG
1273 if (debug & DBG_RAW_CELL) {
1274 int i;
1275
1276 printk("%s: raw cell %x.%02x.%04x.%x.%x\n",
1277 card->name, (header >> 28) & 0x000f,
1278 (header >> 20) & 0x00ff,
1279 (header >> 4) & 0xffff,
1280 (header >> 1) & 0x0007,
1281 (header >> 0) & 0x0001);
1282 for (i = 16; i < 64; i++)
1283 printk(" %02x", queue->data[i]);
1284 printk("\n");
1285 }
1286 #endif
1287
1288 if (vpi >= (1<<card->vpibits) || vci >= (1<<card->vcibits)) {
1289 RPRINTK("%s: SDU received for out-of-range vc %u.%u\n",
1290 card->name, vpi, vci);
1291 goto drop;
1292 }
1293
1294 vc = card->vcs[VPCI2VC(card, vpi, vci)];
1295 if (!vc || !test_bit(VCF_RX, &vc->flags)) {
1296 RPRINTK("%s: SDU received on non RX vc %u.%u\n",
1297 card->name, vpi, vci);
1298 goto drop;
1299 }
1300
1301 vcc = vc->rx_vcc;
1302
1303 if (vcc->qos.aal != ATM_AAL0) {
1304 RPRINTK("%s: raw cell for non AAL0 vc %u.%u\n",
1305 card->name, vpi, vci);
1306 atomic_inc(&vcc->stats->rx_drop);
1307 goto drop;
1308 }
1309
1310 if ((sb = dev_alloc_skb(64)) == NULL) {
1311 printk("%s: Can't allocate buffers for AAL0.\n",
1312 card->name);
1313 atomic_inc(&vcc->stats->rx_err);
1314 goto drop;
1315 }
1316
1317 if (!atm_charge(vcc, sb->truesize)) {
1318 RXPRINTK("%s: atm_charge() dropped AAL0 packets.\n",
1319 card->name);
1320 dev_kfree_skb(sb);
1321 goto drop;
1322 }
1323
1324 *((u32 *) sb->data) = header;
1325 skb_put(sb, sizeof(u32));
1326 memcpy(skb_put(sb, ATM_CELL_PAYLOAD), &(queue->data[16]),
1327 ATM_CELL_PAYLOAD);
1328
1329 ATM_SKB(sb)->vcc = vcc;
1330 __net_timestamp(sb);
1331 vcc->push(vcc, sb);
1332 atomic_inc(&vcc->stats->rx);
1333
1334 drop:
1335 skb_pull(queue, 64);
1336
1337 head = IDT77252_PRV_PADDR(queue)
1338 + (queue->data - queue->head - 16);
1339
1340 if (queue->len < 128) {
1341 struct sk_buff *next;
1342 u32 handle;
1343
1344 head = le32_to_cpu(*(u32 *) &queue->data[0]);
1345 handle = le32_to_cpu(*(u32 *) &queue->data[4]);
1346
1347 next = sb_pool_skb(card, handle);
1348 recycle_rx_skb(card, queue);
1349
1350 if (next) {
1351 card->raw_cell_head = next;
1352 queue = card->raw_cell_head;
1353 pci_dma_sync_single_for_cpu(card->pcidev,
1354 IDT77252_PRV_PADDR(queue),
1355 (skb_end_pointer(queue) -
1356 queue->data),
1357 PCI_DMA_FROMDEVICE);
1358 } else {
1359 card->raw_cell_head = NULL;
1360 printk("%s: raw cell queue overrun\n",
1361 card->name);
1362 break;
1363 }
1364 }
1365 }
1366 }
1367
1368
1369 /*****************************************************************************/
1370 /* */
1371 /* TSQ Handling */
1372 /* */
1373 /*****************************************************************************/
1374
1375 static int
1376 init_tsq(struct idt77252_dev *card)
1377 {
1378 struct tsq_entry *tsqe;
1379
1380 card->tsq.base = pci_alloc_consistent(card->pcidev, RSQSIZE,
1381 &card->tsq.paddr);
1382 if (card->tsq.base == NULL) {
1383 printk("%s: can't allocate TSQ.\n", card->name);
1384 return -1;
1385 }
1386 memset(card->tsq.base, 0, TSQSIZE);
1387
1388 card->tsq.last = card->tsq.base + TSQ_NUM_ENTRIES - 1;
1389 card->tsq.next = card->tsq.last;
1390 for (tsqe = card->tsq.base; tsqe <= card->tsq.last; tsqe++)
1391 tsqe->word_2 = cpu_to_le32(SAR_TSQE_INVALID);
1392
1393 writel(card->tsq.paddr, SAR_REG_TSQB);
1394 writel((unsigned long) card->tsq.next - (unsigned long) card->tsq.base,
1395 SAR_REG_TSQH);
1396
1397 return 0;
1398 }
1399
1400 static void
1401 deinit_tsq(struct idt77252_dev *card)
1402 {
1403 pci_free_consistent(card->pcidev, TSQSIZE,
1404 card->tsq.base, card->tsq.paddr);
1405 }
1406
1407 static void
1408 idt77252_tx(struct idt77252_dev *card)
1409 {
1410 struct tsq_entry *tsqe;
1411 unsigned int vpi, vci;
1412 struct vc_map *vc;
1413 u32 conn, stat;
1414
1415 if (card->tsq.next == card->tsq.last)
1416 tsqe = card->tsq.base;
1417 else
1418 tsqe = card->tsq.next + 1;
1419
1420 TXPRINTK("idt77252_tx: tsq %p: base %p, next %p, last %p\n", tsqe,
1421 card->tsq.base, card->tsq.next, card->tsq.last);
1422 TXPRINTK("idt77252_tx: tsqb %08x, tsqt %08x, tsqh %08x, \n",
1423 readl(SAR_REG_TSQB),
1424 readl(SAR_REG_TSQT),
1425 readl(SAR_REG_TSQH));
1426
1427 stat = le32_to_cpu(tsqe->word_2);
1428
1429 if (stat & SAR_TSQE_INVALID)
1430 return;
1431
1432 do {
1433 TXPRINTK("tsqe: 0x%p [0x%08x 0x%08x]\n", tsqe,
1434 le32_to_cpu(tsqe->word_1),
1435 le32_to_cpu(tsqe->word_2));
1436
1437 switch (stat & SAR_TSQE_TYPE) {
1438 case SAR_TSQE_TYPE_TIMER:
1439 TXPRINTK("%s: Timer RollOver detected.\n", card->name);
1440 break;
1441
1442 case SAR_TSQE_TYPE_IDLE:
1443
1444 conn = le32_to_cpu(tsqe->word_1);
1445
1446 if (SAR_TSQE_TAG(stat) == 0x10) {
1447 #ifdef NOTDEF
1448 printk("%s: Connection %d halted.\n",
1449 card->name,
1450 le32_to_cpu(tsqe->word_1) & 0x1fff);
1451 #endif
1452 break;
1453 }
1454
1455 vc = card->vcs[conn & 0x1fff];
1456 if (!vc) {
1457 printk("%s: could not find VC from conn %d\n",
1458 card->name, conn & 0x1fff);
1459 break;
1460 }
1461
1462 printk("%s: Connection %d IDLE.\n",
1463 card->name, vc->index);
1464
1465 set_bit(VCF_IDLE, &vc->flags);
1466 break;
1467
1468 case SAR_TSQE_TYPE_TSR:
1469
1470 conn = le32_to_cpu(tsqe->word_1);
1471
1472 vc = card->vcs[conn & 0x1fff];
1473 if (!vc) {
1474 printk("%s: no VC at index %d\n",
1475 card->name,
1476 le32_to_cpu(tsqe->word_1) & 0x1fff);
1477 break;
1478 }
1479
1480 drain_scq(card, vc);
1481 break;
1482
1483 case SAR_TSQE_TYPE_TBD_COMP:
1484
1485 conn = le32_to_cpu(tsqe->word_1);
1486
1487 vpi = (conn >> SAR_TBD_VPI_SHIFT) & 0x00ff;
1488 vci = (conn >> SAR_TBD_VCI_SHIFT) & 0xffff;
1489
1490 if (vpi >= (1 << card->vpibits) ||
1491 vci >= (1 << card->vcibits)) {
1492 printk("%s: TBD complete: "
1493 "out of range VPI.VCI %u.%u\n",
1494 card->name, vpi, vci);
1495 break;
1496 }
1497
1498 vc = card->vcs[VPCI2VC(card, vpi, vci)];
1499 if (!vc) {
1500 printk("%s: TBD complete: "
1501 "no VC at VPI.VCI %u.%u\n",
1502 card->name, vpi, vci);
1503 break;
1504 }
1505
1506 drain_scq(card, vc);
1507 break;
1508 }
1509
1510 tsqe->word_2 = cpu_to_le32(SAR_TSQE_INVALID);
1511
1512 card->tsq.next = tsqe;
1513 if (card->tsq.next == card->tsq.last)
1514 tsqe = card->tsq.base;
1515 else
1516 tsqe = card->tsq.next + 1;
1517
1518 TXPRINTK("tsqe: %p: base %p, next %p, last %p\n", tsqe,
1519 card->tsq.base, card->tsq.next, card->tsq.last);
1520
1521 stat = le32_to_cpu(tsqe->word_2);
1522
1523 } while (!(stat & SAR_TSQE_INVALID));
1524
1525 writel((unsigned long)card->tsq.next - (unsigned long)card->tsq.base,
1526 SAR_REG_TSQH);
1527
1528 XPRINTK("idt77252_tx-after writel%d: TSQ head = 0x%x, tail = 0x%x, next = 0x%p.\n",
1529 card->index, readl(SAR_REG_TSQH),
1530 readl(SAR_REG_TSQT), card->tsq.next);
1531 }
1532
1533
1534 static void
1535 tst_timer(unsigned long data)
1536 {
1537 struct idt77252_dev *card = (struct idt77252_dev *)data;
1538 unsigned long base, idle, jump;
1539 unsigned long flags;
1540 u32 pc;
1541 int e;
1542
1543 spin_lock_irqsave(&card->tst_lock, flags);
1544
1545 base = card->tst[card->tst_index];
1546 idle = card->tst[card->tst_index ^ 1];
1547
1548 if (test_bit(TST_SWITCH_WAIT, &card->tst_state)) {
1549 jump = base + card->tst_size - 2;
1550
1551 pc = readl(SAR_REG_NOW) >> 2;
1552 if ((pc ^ idle) & ~(card->tst_size - 1)) {
1553 mod_timer(&card->tst_timer, jiffies + 1);
1554 goto out;
1555 }
1556
1557 clear_bit(TST_SWITCH_WAIT, &card->tst_state);
1558
1559 card->tst_index ^= 1;
1560 write_sram(card, jump, TSTE_OPC_JMP | (base << 2));
1561
1562 base = card->tst[card->tst_index];
1563 idle = card->tst[card->tst_index ^ 1];
1564
1565 for (e = 0; e < card->tst_size - 2; e++) {
1566 if (card->soft_tst[e].tste & TSTE_PUSH_IDLE) {
1567 write_sram(card, idle + e,
1568 card->soft_tst[e].tste & TSTE_MASK);
1569 card->soft_tst[e].tste &= ~(TSTE_PUSH_IDLE);
1570 }
1571 }
1572 }
1573
1574 if (test_and_clear_bit(TST_SWITCH_PENDING, &card->tst_state)) {
1575
1576 for (e = 0; e < card->tst_size - 2; e++) {
1577 if (card->soft_tst[e].tste & TSTE_PUSH_ACTIVE) {
1578 write_sram(card, idle + e,
1579 card->soft_tst[e].tste & TSTE_MASK);
1580 card->soft_tst[e].tste &= ~(TSTE_PUSH_ACTIVE);
1581 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1582 }
1583 }
1584
1585 jump = base + card->tst_size - 2;
1586
1587 write_sram(card, jump, TSTE_OPC_NULL);
1588 set_bit(TST_SWITCH_WAIT, &card->tst_state);
1589
1590 mod_timer(&card->tst_timer, jiffies + 1);
1591 }
1592
1593 out:
1594 spin_unlock_irqrestore(&card->tst_lock, flags);
1595 }
1596
1597 static int
1598 __fill_tst(struct idt77252_dev *card, struct vc_map *vc,
1599 int n, unsigned int opc)
1600 {
1601 unsigned long cl, avail;
1602 unsigned long idle;
1603 int e, r;
1604 u32 data;
1605
1606 avail = card->tst_size - 2;
1607 for (e = 0; e < avail; e++) {
1608 if (card->soft_tst[e].vc == NULL)
1609 break;
1610 }
1611 if (e >= avail) {
1612 printk("%s: No free TST entries found\n", card->name);
1613 return -1;
1614 }
1615
1616 NPRINTK("%s: conn %d: first TST entry at %d.\n",
1617 card->name, vc ? vc->index : -1, e);
1618
1619 r = n;
1620 cl = avail;
1621 data = opc & TSTE_OPC_MASK;
1622 if (vc && (opc != TSTE_OPC_NULL))
1623 data = opc | vc->index;
1624
1625 idle = card->tst[card->tst_index ^ 1];
1626
1627 /*
1628 * Fill Soft TST.
1629 */
1630 while (r > 0) {
1631 if ((cl >= avail) && (card->soft_tst[e].vc == NULL)) {
1632 if (vc)
1633 card->soft_tst[e].vc = vc;
1634 else
1635 card->soft_tst[e].vc = (void *)-1;
1636
1637 card->soft_tst[e].tste = data;
1638 if (timer_pending(&card->tst_timer))
1639 card->soft_tst[e].tste |= TSTE_PUSH_ACTIVE;
1640 else {
1641 write_sram(card, idle + e, data);
1642 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1643 }
1644
1645 cl -= card->tst_size;
1646 r--;
1647 }
1648
1649 if (++e == avail)
1650 e = 0;
1651 cl += n;
1652 }
1653
1654 return 0;
1655 }
1656
1657 static int
1658 fill_tst(struct idt77252_dev *card, struct vc_map *vc, int n, unsigned int opc)
1659 {
1660 unsigned long flags;
1661 int res;
1662
1663 spin_lock_irqsave(&card->tst_lock, flags);
1664
1665 res = __fill_tst(card, vc, n, opc);
1666
1667 set_bit(TST_SWITCH_PENDING, &card->tst_state);
1668 if (!timer_pending(&card->tst_timer))
1669 mod_timer(&card->tst_timer, jiffies + 1);
1670
1671 spin_unlock_irqrestore(&card->tst_lock, flags);
1672 return res;
1673 }
1674
1675 static int
1676 __clear_tst(struct idt77252_dev *card, struct vc_map *vc)
1677 {
1678 unsigned long idle;
1679 int e;
1680
1681 idle = card->tst[card->tst_index ^ 1];
1682
1683 for (e = 0; e < card->tst_size - 2; e++) {
1684 if (card->soft_tst[e].vc == vc) {
1685 card->soft_tst[e].vc = NULL;
1686
1687 card->soft_tst[e].tste = TSTE_OPC_VAR;
1688 if (timer_pending(&card->tst_timer))
1689 card->soft_tst[e].tste |= TSTE_PUSH_ACTIVE;
1690 else {
1691 write_sram(card, idle + e, TSTE_OPC_VAR);
1692 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1693 }
1694 }
1695 }
1696
1697 return 0;
1698 }
1699
1700 static int
1701 clear_tst(struct idt77252_dev *card, struct vc_map *vc)
1702 {
1703 unsigned long flags;
1704 int res;
1705
1706 spin_lock_irqsave(&card->tst_lock, flags);
1707
1708 res = __clear_tst(card, vc);
1709
1710 set_bit(TST_SWITCH_PENDING, &card->tst_state);
1711 if (!timer_pending(&card->tst_timer))
1712 mod_timer(&card->tst_timer, jiffies + 1);
1713
1714 spin_unlock_irqrestore(&card->tst_lock, flags);
1715 return res;
1716 }
1717
1718 static int
1719 change_tst(struct idt77252_dev *card, struct vc_map *vc,
1720 int n, unsigned int opc)
1721 {
1722 unsigned long flags;
1723 int res;
1724
1725 spin_lock_irqsave(&card->tst_lock, flags);
1726
1727 __clear_tst(card, vc);
1728 res = __fill_tst(card, vc, n, opc);
1729
1730 set_bit(TST_SWITCH_PENDING, &card->tst_state);
1731 if (!timer_pending(&card->tst_timer))
1732 mod_timer(&card->tst_timer, jiffies + 1);
1733
1734 spin_unlock_irqrestore(&card->tst_lock, flags);
1735 return res;
1736 }
1737
1738
1739 static int
1740 set_tct(struct idt77252_dev *card, struct vc_map *vc)
1741 {
1742 unsigned long tct;
1743
1744 tct = (unsigned long) (card->tct_base + vc->index * SAR_SRAM_TCT_SIZE);
1745
1746 switch (vc->class) {
1747 case SCHED_CBR:
1748 OPRINTK("%s: writing TCT at 0x%lx, SCD 0x%lx.\n",
1749 card->name, tct, vc->scq->scd);
1750
1751 write_sram(card, tct + 0, TCT_CBR | vc->scq->scd);
1752 write_sram(card, tct + 1, 0);
1753 write_sram(card, tct + 2, 0);
1754 write_sram(card, tct + 3, 0);
1755 write_sram(card, tct + 4, 0);
1756 write_sram(card, tct + 5, 0);
1757 write_sram(card, tct + 6, 0);
1758 write_sram(card, tct + 7, 0);
1759 break;
1760
1761 case SCHED_UBR:
1762 OPRINTK("%s: writing TCT at 0x%lx, SCD 0x%lx.\n",
1763 card->name, tct, vc->scq->scd);
1764
1765 write_sram(card, tct + 0, TCT_UBR | vc->scq->scd);
1766 write_sram(card, tct + 1, 0);
1767 write_sram(card, tct + 2, TCT_TSIF);
1768 write_sram(card, tct + 3, TCT_HALT | TCT_IDLE);
1769 write_sram(card, tct + 4, 0);
1770 write_sram(card, tct + 5, vc->init_er);
1771 write_sram(card, tct + 6, 0);
1772 write_sram(card, tct + 7, TCT_FLAG_UBR);
1773 break;
1774
1775 case SCHED_VBR:
1776 case SCHED_ABR:
1777 default:
1778 return -ENOSYS;
1779 }
1780
1781 return 0;
1782 }
1783
1784 /*****************************************************************************/
1785 /* */
1786 /* FBQ Handling */
1787 /* */
1788 /*****************************************************************************/
1789
1790 static __inline__ int
1791 idt77252_fbq_level(struct idt77252_dev *card, int queue)
1792 {
1793 return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) & 0x0f;
1794 }
1795
1796 static __inline__ int
1797 idt77252_fbq_full(struct idt77252_dev *card, int queue)
1798 {
1799 return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) == 0x0f;
1800 }
1801
1802 static int
1803 push_rx_skb(struct idt77252_dev *card, struct sk_buff *skb, int queue)
1804 {
1805 unsigned long flags;
1806 u32 handle;
1807 u32 addr;
1808
1809 skb->data = skb->head;
1810 skb_reset_tail_pointer(skb);
1811 skb->len = 0;
1812
1813 skb_reserve(skb, 16);
1814
1815 switch (queue) {
1816 case 0:
1817 skb_put(skb, SAR_FB_SIZE_0);
1818 break;
1819 case 1:
1820 skb_put(skb, SAR_FB_SIZE_1);
1821 break;
1822 case 2:
1823 skb_put(skb, SAR_FB_SIZE_2);
1824 break;
1825 case 3:
1826 skb_put(skb, SAR_FB_SIZE_3);
1827 break;
1828 default:
1829 return -1;
1830 }
1831
1832 if (idt77252_fbq_full(card, queue))
1833 return -1;
1834
1835 memset(&skb->data[(skb->len & ~(0x3f)) - 64], 0, 2 * sizeof(u32));
1836
1837 handle = IDT77252_PRV_POOL(skb);
1838 addr = IDT77252_PRV_PADDR(skb);
1839
1840 spin_lock_irqsave(&card->cmd_lock, flags);
1841 writel(handle, card->fbq[queue]);
1842 writel(addr, card->fbq[queue]);
1843 spin_unlock_irqrestore(&card->cmd_lock, flags);
1844
1845 return 0;
1846 }
1847
1848 static void
1849 add_rx_skb(struct idt77252_dev *card, int queue,
1850 unsigned int size, unsigned int count)
1851 {
1852 struct sk_buff *skb;
1853 dma_addr_t paddr;
1854 u32 handle;
1855
1856 while (count--) {
1857 skb = dev_alloc_skb(size);
1858 if (!skb)
1859 return;
1860
1861 if (sb_pool_add(card, skb, queue)) {
1862 printk("%s: SB POOL full\n", __func__);
1863 goto outfree;
1864 }
1865
1866 paddr = pci_map_single(card->pcidev, skb->data,
1867 skb_end_pointer(skb) - skb->data,
1868 PCI_DMA_FROMDEVICE);
1869 IDT77252_PRV_PADDR(skb) = paddr;
1870
1871 if (push_rx_skb(card, skb, queue)) {
1872 printk("%s: FB QUEUE full\n", __func__);
1873 goto outunmap;
1874 }
1875 }
1876
1877 return;
1878
1879 outunmap:
1880 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
1881 skb_end_pointer(skb) - skb->data, PCI_DMA_FROMDEVICE);
1882
1883 handle = IDT77252_PRV_POOL(skb);
1884 card->sbpool[POOL_QUEUE(handle)].skb[POOL_INDEX(handle)] = NULL;
1885
1886 outfree:
1887 dev_kfree_skb(skb);
1888 }
1889
1890
1891 static void
1892 recycle_rx_skb(struct idt77252_dev *card, struct sk_buff *skb)
1893 {
1894 u32 handle = IDT77252_PRV_POOL(skb);
1895 int err;
1896
1897 pci_dma_sync_single_for_device(card->pcidev, IDT77252_PRV_PADDR(skb),
1898 skb_end_pointer(skb) - skb->data,
1899 PCI_DMA_FROMDEVICE);
1900
1901 err = push_rx_skb(card, skb, POOL_QUEUE(handle));
1902 if (err) {
1903 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
1904 skb_end_pointer(skb) - skb->data,
1905 PCI_DMA_FROMDEVICE);
1906 sb_pool_remove(card, skb);
1907 dev_kfree_skb(skb);
1908 }
1909 }
1910
1911 static void
1912 flush_rx_pool(struct idt77252_dev *card, struct rx_pool *rpp)
1913 {
1914 skb_queue_head_init(&rpp->queue);
1915 rpp->len = 0;
1916 }
1917
1918 static void
1919 recycle_rx_pool_skb(struct idt77252_dev *card, struct rx_pool *rpp)
1920 {
1921 struct sk_buff *skb, *tmp;
1922
1923 skb_queue_walk_safe(&rpp->queue, skb, tmp)
1924 recycle_rx_skb(card, skb);
1925
1926 flush_rx_pool(card, rpp);
1927 }
1928
1929 /*****************************************************************************/
1930 /* */
1931 /* ATM Interface */
1932 /* */
1933 /*****************************************************************************/
1934
1935 static void
1936 idt77252_phy_put(struct atm_dev *dev, unsigned char value, unsigned long addr)
1937 {
1938 write_utility(dev->dev_data, 0x100 + (addr & 0x1ff), value);
1939 }
1940
1941 static unsigned char
1942 idt77252_phy_get(struct atm_dev *dev, unsigned long addr)
1943 {
1944 return read_utility(dev->dev_data, 0x100 + (addr & 0x1ff));
1945 }
1946
1947 static inline int
1948 idt77252_send_skb(struct atm_vcc *vcc, struct sk_buff *skb, int oam)
1949 {
1950 struct atm_dev *dev = vcc->dev;
1951 struct idt77252_dev *card = dev->dev_data;
1952 struct vc_map *vc = vcc->dev_data;
1953 int err;
1954
1955 if (vc == NULL) {
1956 printk("%s: NULL connection in send().\n", card->name);
1957 atomic_inc(&vcc->stats->tx_err);
1958 dev_kfree_skb(skb);
1959 return -EINVAL;
1960 }
1961 if (!test_bit(VCF_TX, &vc->flags)) {
1962 printk("%s: Trying to transmit on a non-tx VC.\n", card->name);
1963 atomic_inc(&vcc->stats->tx_err);
1964 dev_kfree_skb(skb);
1965 return -EINVAL;
1966 }
1967
1968 switch (vcc->qos.aal) {
1969 case ATM_AAL0:
1970 case ATM_AAL1:
1971 case ATM_AAL5:
1972 break;
1973 default:
1974 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal);
1975 atomic_inc(&vcc->stats->tx_err);
1976 dev_kfree_skb(skb);
1977 return -EINVAL;
1978 }
1979
1980 if (skb_shinfo(skb)->nr_frags != 0) {
1981 printk("%s: No scatter-gather yet.\n", card->name);
1982 atomic_inc(&vcc->stats->tx_err);
1983 dev_kfree_skb(skb);
1984 return -EINVAL;
1985 }
1986 ATM_SKB(skb)->vcc = vcc;
1987
1988 err = queue_skb(card, vc, skb, oam);
1989 if (err) {
1990 atomic_inc(&vcc->stats->tx_err);
1991 dev_kfree_skb(skb);
1992 return err;
1993 }
1994
1995 return 0;
1996 }
1997
1998 static int idt77252_send(struct atm_vcc *vcc, struct sk_buff *skb)
1999 {
2000 return idt77252_send_skb(vcc, skb, 0);
2001 }
2002
2003 static int
2004 idt77252_send_oam(struct atm_vcc *vcc, void *cell, int flags)
2005 {
2006 struct atm_dev *dev = vcc->dev;
2007 struct idt77252_dev *card = dev->dev_data;
2008 struct sk_buff *skb;
2009
2010 skb = dev_alloc_skb(64);
2011 if (!skb) {
2012 printk("%s: Out of memory in send_oam().\n", card->name);
2013 atomic_inc(&vcc->stats->tx_err);
2014 return -ENOMEM;
2015 }
2016 atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
2017
2018 memcpy(skb_put(skb, 52), cell, 52);
2019
2020 return idt77252_send_skb(vcc, skb, 1);
2021 }
2022
2023 static __inline__ unsigned int
2024 idt77252_fls(unsigned int x)
2025 {
2026 int r = 1;
2027
2028 if (x == 0)
2029 return 0;
2030 if (x & 0xffff0000) {
2031 x >>= 16;
2032 r += 16;
2033 }
2034 if (x & 0xff00) {
2035 x >>= 8;
2036 r += 8;
2037 }
2038 if (x & 0xf0) {
2039 x >>= 4;
2040 r += 4;
2041 }
2042 if (x & 0xc) {
2043 x >>= 2;
2044 r += 2;
2045 }
2046 if (x & 0x2)
2047 r += 1;
2048 return r;
2049 }
2050
2051 static u16
2052 idt77252_int_to_atmfp(unsigned int rate)
2053 {
2054 u16 m, e;
2055
2056 if (rate == 0)
2057 return 0;
2058 e = idt77252_fls(rate) - 1;
2059 if (e < 9)
2060 m = (rate - (1 << e)) << (9 - e);
2061 else if (e == 9)
2062 m = (rate - (1 << e));
2063 else /* e > 9 */
2064 m = (rate - (1 << e)) >> (e - 9);
2065 return 0x4000 | (e << 9) | m;
2066 }
2067
2068 static u8
2069 idt77252_rate_logindex(struct idt77252_dev *card, int pcr)
2070 {
2071 u16 afp;
2072
2073 afp = idt77252_int_to_atmfp(pcr < 0 ? -pcr : pcr);
2074 if (pcr < 0)
2075 return rate_to_log[(afp >> 5) & 0x1ff];
2076 return rate_to_log[((afp >> 5) + 1) & 0x1ff];
2077 }
2078
2079 static void
2080 idt77252_est_timer(unsigned long data)
2081 {
2082 struct vc_map *vc = (struct vc_map *)data;
2083 struct idt77252_dev *card = vc->card;
2084 struct rate_estimator *est;
2085 unsigned long flags;
2086 u32 rate, cps;
2087 u64 ncells;
2088 u8 lacr;
2089
2090 spin_lock_irqsave(&vc->lock, flags);
2091 est = vc->estimator;
2092 if (!est)
2093 goto out;
2094
2095 ncells = est->cells;
2096
2097 rate = ((u32)(ncells - est->last_cells)) << (7 - est->interval);
2098 est->last_cells = ncells;
2099 est->avcps += ((long)rate - (long)est->avcps) >> est->ewma_log;
2100 est->cps = (est->avcps + 0x1f) >> 5;
2101
2102 cps = est->cps;
2103 if (cps < (est->maxcps >> 4))
2104 cps = est->maxcps >> 4;
2105
2106 lacr = idt77252_rate_logindex(card, cps);
2107 if (lacr > vc->max_er)
2108 lacr = vc->max_er;
2109
2110 if (lacr != vc->lacr) {
2111 vc->lacr = lacr;
2112 writel(TCMDQ_LACR|(vc->lacr << 16)|vc->index, SAR_REG_TCMDQ);
2113 }
2114
2115 est->timer.expires = jiffies + ((HZ / 4) << est->interval);
2116 add_timer(&est->timer);
2117
2118 out:
2119 spin_unlock_irqrestore(&vc->lock, flags);
2120 }
2121
2122 static struct rate_estimator *
2123 idt77252_init_est(struct vc_map *vc, int pcr)
2124 {
2125 struct rate_estimator *est;
2126
2127 est = kzalloc(sizeof(struct rate_estimator), GFP_KERNEL);
2128 if (!est)
2129 return NULL;
2130 est->maxcps = pcr < 0 ? -pcr : pcr;
2131 est->cps = est->maxcps;
2132 est->avcps = est->cps << 5;
2133
2134 est->interval = 2; /* XXX: make this configurable */
2135 est->ewma_log = 2; /* XXX: make this configurable */
2136 init_timer(&est->timer);
2137 est->timer.data = (unsigned long)vc;
2138 est->timer.function = idt77252_est_timer;
2139
2140 est->timer.expires = jiffies + ((HZ / 4) << est->interval);
2141 add_timer(&est->timer);
2142
2143 return est;
2144 }
2145
2146 static int
2147 idt77252_init_cbr(struct idt77252_dev *card, struct vc_map *vc,
2148 struct atm_vcc *vcc, struct atm_qos *qos)
2149 {
2150 int tst_free, tst_used, tst_entries;
2151 unsigned long tmpl, modl;
2152 int tcr, tcra;
2153
2154 if ((qos->txtp.max_pcr == 0) &&
2155 (qos->txtp.pcr == 0) && (qos->txtp.min_pcr == 0)) {
2156 printk("%s: trying to open a CBR VC with cell rate = 0\n",
2157 card->name);
2158 return -EINVAL;
2159 }
2160
2161 tst_used = 0;
2162 tst_free = card->tst_free;
2163 if (test_bit(VCF_TX, &vc->flags))
2164 tst_used = vc->ntste;
2165 tst_free += tst_used;
2166
2167 tcr = atm_pcr_goal(&qos->txtp);
2168 tcra = tcr >= 0 ? tcr : -tcr;
2169
2170 TXPRINTK("%s: CBR target cell rate = %d\n", card->name, tcra);
2171
2172 tmpl = (unsigned long) tcra * ((unsigned long) card->tst_size - 2);
2173 modl = tmpl % (unsigned long)card->utopia_pcr;
2174
2175 tst_entries = (int) (tmpl / card->utopia_pcr);
2176 if (tcr > 0) {
2177 if (modl > 0)
2178 tst_entries++;
2179 } else if (tcr == 0) {
2180 tst_entries = tst_free - SAR_TST_RESERVED;
2181 if (tst_entries <= 0) {
2182 printk("%s: no CBR bandwidth free.\n", card->name);
2183 return -ENOSR;
2184 }
2185 }
2186
2187 if (tst_entries == 0) {
2188 printk("%s: selected CBR bandwidth < granularity.\n",
2189 card->name);
2190 return -EINVAL;
2191 }
2192
2193 if (tst_entries > (tst_free - SAR_TST_RESERVED)) {
2194 printk("%s: not enough CBR bandwidth free.\n", card->name);
2195 return -ENOSR;
2196 }
2197
2198 vc->ntste = tst_entries;
2199
2200 card->tst_free = tst_free - tst_entries;
2201 if (test_bit(VCF_TX, &vc->flags)) {
2202 if (tst_used == tst_entries)
2203 return 0;
2204
2205 OPRINTK("%s: modify %d -> %d entries in TST.\n",
2206 card->name, tst_used, tst_entries);
2207 change_tst(card, vc, tst_entries, TSTE_OPC_CBR);
2208 return 0;
2209 }
2210
2211 OPRINTK("%s: setting %d entries in TST.\n", card->name, tst_entries);
2212 fill_tst(card, vc, tst_entries, TSTE_OPC_CBR);
2213 return 0;
2214 }
2215
2216 static int
2217 idt77252_init_ubr(struct idt77252_dev *card, struct vc_map *vc,
2218 struct atm_vcc *vcc, struct atm_qos *qos)
2219 {
2220 unsigned long flags;
2221 int tcr;
2222
2223 spin_lock_irqsave(&vc->lock, flags);
2224 if (vc->estimator) {
2225 del_timer(&vc->estimator->timer);
2226 kfree(vc->estimator);
2227 vc->estimator = NULL;
2228 }
2229 spin_unlock_irqrestore(&vc->lock, flags);
2230
2231 tcr = atm_pcr_goal(&qos->txtp);
2232 if (tcr == 0)
2233 tcr = card->link_pcr;
2234
2235 vc->estimator = idt77252_init_est(vc, tcr);
2236
2237 vc->class = SCHED_UBR;
2238 vc->init_er = idt77252_rate_logindex(card, tcr);
2239 vc->lacr = vc->init_er;
2240 if (tcr < 0)
2241 vc->max_er = vc->init_er;
2242 else
2243 vc->max_er = 0xff;
2244
2245 return 0;
2246 }
2247
2248 static int
2249 idt77252_init_tx(struct idt77252_dev *card, struct vc_map *vc,
2250 struct atm_vcc *vcc, struct atm_qos *qos)
2251 {
2252 int error;
2253
2254 if (test_bit(VCF_TX, &vc->flags))
2255 return -EBUSY;
2256
2257 switch (qos->txtp.traffic_class) {
2258 case ATM_CBR:
2259 vc->class = SCHED_CBR;
2260 break;
2261
2262 case ATM_UBR:
2263 vc->class = SCHED_UBR;
2264 break;
2265
2266 case ATM_VBR:
2267 case ATM_ABR:
2268 default:
2269 return -EPROTONOSUPPORT;
2270 }
2271
2272 vc->scq = alloc_scq(card, vc->class);
2273 if (!vc->scq) {
2274 printk("%s: can't get SCQ.\n", card->name);
2275 return -ENOMEM;
2276 }
2277
2278 vc->scq->scd = get_free_scd(card, vc);
2279 if (vc->scq->scd == 0) {
2280 printk("%s: no SCD available.\n", card->name);
2281 free_scq(card, vc->scq);
2282 return -ENOMEM;
2283 }
2284
2285 fill_scd(card, vc->scq, vc->class);
2286
2287 if (set_tct(card, vc)) {
2288 printk("%s: class %d not supported.\n",
2289 card->name, qos->txtp.traffic_class);
2290
2291 card->scd2vc[vc->scd_index] = NULL;
2292 free_scq(card, vc->scq);
2293 return -EPROTONOSUPPORT;
2294 }
2295
2296 switch (vc->class) {
2297 case SCHED_CBR:
2298 error = idt77252_init_cbr(card, vc, vcc, qos);
2299 if (error) {
2300 card->scd2vc[vc->scd_index] = NULL;
2301 free_scq(card, vc->scq);
2302 return error;
2303 }
2304
2305 clear_bit(VCF_IDLE, &vc->flags);
2306 writel(TCMDQ_START | vc->index, SAR_REG_TCMDQ);
2307 break;
2308
2309 case SCHED_UBR:
2310 error = idt77252_init_ubr(card, vc, vcc, qos);
2311 if (error) {
2312 card->scd2vc[vc->scd_index] = NULL;
2313 free_scq(card, vc->scq);
2314 return error;
2315 }
2316
2317 set_bit(VCF_IDLE, &vc->flags);
2318 break;
2319 }
2320
2321 vc->tx_vcc = vcc;
2322 set_bit(VCF_TX, &vc->flags);
2323 return 0;
2324 }
2325
2326 static int
2327 idt77252_init_rx(struct idt77252_dev *card, struct vc_map *vc,
2328 struct atm_vcc *vcc, struct atm_qos *qos)
2329 {
2330 unsigned long flags;
2331 unsigned long addr;
2332 u32 rcte = 0;
2333
2334 if (test_bit(VCF_RX, &vc->flags))
2335 return -EBUSY;
2336
2337 vc->rx_vcc = vcc;
2338 set_bit(VCF_RX, &vc->flags);
2339
2340 if ((vcc->vci == 3) || (vcc->vci == 4))
2341 return 0;
2342
2343 flush_rx_pool(card, &vc->rcv.rx_pool);
2344
2345 rcte |= SAR_RCTE_CONNECTOPEN;
2346 rcte |= SAR_RCTE_RAWCELLINTEN;
2347
2348 switch (qos->aal) {
2349 case ATM_AAL0:
2350 rcte |= SAR_RCTE_RCQ;
2351 break;
2352 case ATM_AAL1:
2353 rcte |= SAR_RCTE_OAM; /* Let SAR drop Video */
2354 break;
2355 case ATM_AAL34:
2356 rcte |= SAR_RCTE_AAL34;
2357 break;
2358 case ATM_AAL5:
2359 rcte |= SAR_RCTE_AAL5;
2360 break;
2361 default:
2362 rcte |= SAR_RCTE_RCQ;
2363 break;
2364 }
2365
2366 if (qos->aal != ATM_AAL5)
2367 rcte |= SAR_RCTE_FBP_1;
2368 else if (qos->rxtp.max_sdu > SAR_FB_SIZE_2)
2369 rcte |= SAR_RCTE_FBP_3;
2370 else if (qos->rxtp.max_sdu > SAR_FB_SIZE_1)
2371 rcte |= SAR_RCTE_FBP_2;
2372 else if (qos->rxtp.max_sdu > SAR_FB_SIZE_0)
2373 rcte |= SAR_RCTE_FBP_1;
2374 else
2375 rcte |= SAR_RCTE_FBP_01;
2376
2377 addr = card->rct_base + (vc->index << 2);
2378
2379 OPRINTK("%s: writing RCT at 0x%lx\n", card->name, addr);
2380 write_sram(card, addr, rcte);
2381
2382 spin_lock_irqsave(&card->cmd_lock, flags);
2383 writel(SAR_CMD_OPEN_CONNECTION | (addr << 2), SAR_REG_CMD);
2384 waitfor_idle(card);
2385 spin_unlock_irqrestore(&card->cmd_lock, flags);
2386
2387 return 0;
2388 }
2389
2390 static int
2391 idt77252_open(struct atm_vcc *vcc)
2392 {
2393 struct atm_dev *dev = vcc->dev;
2394 struct idt77252_dev *card = dev->dev_data;
2395 struct vc_map *vc;
2396 unsigned int index;
2397 unsigned int inuse;
2398 int error;
2399 int vci = vcc->vci;
2400 short vpi = vcc->vpi;
2401
2402 if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC)
2403 return 0;
2404
2405 if (vpi >= (1 << card->vpibits)) {
2406 printk("%s: unsupported VPI: %d\n", card->name, vpi);
2407 return -EINVAL;
2408 }
2409
2410 if (vci >= (1 << card->vcibits)) {
2411 printk("%s: unsupported VCI: %d\n", card->name, vci);
2412 return -EINVAL;
2413 }
2414
2415 set_bit(ATM_VF_ADDR, &vcc->flags);
2416
2417 mutex_lock(&card->mutex);
2418
2419 OPRINTK("%s: opening vpi.vci: %d.%d\n", card->name, vpi, vci);
2420
2421 switch (vcc->qos.aal) {
2422 case ATM_AAL0:
2423 case ATM_AAL1:
2424 case ATM_AAL5:
2425 break;
2426 default:
2427 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal);
2428 mutex_unlock(&card->mutex);
2429 return -EPROTONOSUPPORT;
2430 }
2431
2432 index = VPCI2VC(card, vpi, vci);
2433 if (!card->vcs[index]) {
2434 card->vcs[index] = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2435 if (!card->vcs[index]) {
2436 printk("%s: can't alloc vc in open()\n", card->name);
2437 mutex_unlock(&card->mutex);
2438 return -ENOMEM;
2439 }
2440 card->vcs[index]->card = card;
2441 card->vcs[index]->index = index;
2442
2443 spin_lock_init(&card->vcs[index]->lock);
2444 }
2445 vc = card->vcs[index];
2446
2447 vcc->dev_data = vc;
2448
2449 IPRINTK("%s: idt77252_open: vc = %d (%d.%d) %s/%s (max RX SDU: %u)\n",
2450 card->name, vc->index, vcc->vpi, vcc->vci,
2451 vcc->qos.rxtp.traffic_class != ATM_NONE ? "rx" : "--",
2452 vcc->qos.txtp.traffic_class != ATM_NONE ? "tx" : "--",
2453 vcc->qos.rxtp.max_sdu);
2454
2455 inuse = 0;
2456 if (vcc->qos.txtp.traffic_class != ATM_NONE &&
2457 test_bit(VCF_TX, &vc->flags))
2458 inuse = 1;
2459 if (vcc->qos.rxtp.traffic_class != ATM_NONE &&
2460 test_bit(VCF_RX, &vc->flags))
2461 inuse += 2;
2462
2463 if (inuse) {
2464 printk("%s: %s vci already in use.\n", card->name,
2465 inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx");
2466 mutex_unlock(&card->mutex);
2467 return -EADDRINUSE;
2468 }
2469
2470 if (vcc->qos.txtp.traffic_class != ATM_NONE) {
2471 error = idt77252_init_tx(card, vc, vcc, &vcc->qos);
2472 if (error) {
2473 mutex_unlock(&card->mutex);
2474 return error;
2475 }
2476 }
2477
2478 if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
2479 error = idt77252_init_rx(card, vc, vcc, &vcc->qos);
2480 if (error) {
2481 mutex_unlock(&card->mutex);
2482 return error;
2483 }
2484 }
2485
2486 set_bit(ATM_VF_READY, &vcc->flags);
2487
2488 mutex_unlock(&card->mutex);
2489 return 0;
2490 }
2491
2492 static void
2493 idt77252_close(struct atm_vcc *vcc)
2494 {
2495 struct atm_dev *dev = vcc->dev;
2496 struct idt77252_dev *card = dev->dev_data;
2497 struct vc_map *vc = vcc->dev_data;
2498 unsigned long flags;
2499 unsigned long addr;
2500 unsigned long timeout;
2501
2502 mutex_lock(&card->mutex);
2503
2504 IPRINTK("%s: idt77252_close: vc = %d (%d.%d)\n",
2505 card->name, vc->index, vcc->vpi, vcc->vci);
2506
2507 clear_bit(ATM_VF_READY, &vcc->flags);
2508
2509 if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
2510
2511 spin_lock_irqsave(&vc->lock, flags);
2512 clear_bit(VCF_RX, &vc->flags);
2513 vc->rx_vcc = NULL;
2514 spin_unlock_irqrestore(&vc->lock, flags);
2515
2516 if ((vcc->vci == 3) || (vcc->vci == 4))
2517 goto done;
2518
2519 addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE;
2520
2521 spin_lock_irqsave(&card->cmd_lock, flags);
2522 writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2), SAR_REG_CMD);
2523 waitfor_idle(card);
2524 spin_unlock_irqrestore(&card->cmd_lock, flags);
2525
2526 if (skb_queue_len(&vc->rcv.rx_pool.queue) != 0) {
2527 DPRINTK("%s: closing a VC with pending rx buffers.\n",
2528 card->name);
2529
2530 recycle_rx_pool_skb(card, &vc->rcv.rx_pool);
2531 }
2532 }
2533
2534 done:
2535 if (vcc->qos.txtp.traffic_class != ATM_NONE) {
2536
2537 spin_lock_irqsave(&vc->lock, flags);
2538 clear_bit(VCF_TX, &vc->flags);
2539 clear_bit(VCF_IDLE, &vc->flags);
2540 clear_bit(VCF_RSV, &vc->flags);
2541 vc->tx_vcc = NULL;
2542
2543 if (vc->estimator) {
2544 del_timer(&vc->estimator->timer);
2545 kfree(vc->estimator);
2546 vc->estimator = NULL;
2547 }
2548 spin_unlock_irqrestore(&vc->lock, flags);
2549
2550 timeout = 5 * 1000;
2551 while (atomic_read(&vc->scq->used) > 0) {
2552 timeout = msleep_interruptible(timeout);
2553 if (!timeout)
2554 break;
2555 }
2556 if (!timeout)
2557 printk("%s: SCQ drain timeout: %u used\n",
2558 card->name, atomic_read(&vc->scq->used));
2559
2560 writel(TCMDQ_HALT | vc->index, SAR_REG_TCMDQ);
2561 clear_scd(card, vc->scq, vc->class);
2562
2563 if (vc->class == SCHED_CBR) {
2564 clear_tst(card, vc);
2565 card->tst_free += vc->ntste;
2566 vc->ntste = 0;
2567 }
2568
2569 card->scd2vc[vc->scd_index] = NULL;
2570 free_scq(card, vc->scq);
2571 }
2572
2573 mutex_unlock(&card->mutex);
2574 }
2575
2576 static int
2577 idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos, int flags)
2578 {
2579 struct atm_dev *dev = vcc->dev;
2580 struct idt77252_dev *card = dev->dev_data;
2581 struct vc_map *vc = vcc->dev_data;
2582 int error = 0;
2583
2584 mutex_lock(&card->mutex);
2585
2586 if (qos->txtp.traffic_class != ATM_NONE) {
2587 if (!test_bit(VCF_TX, &vc->flags)) {
2588 error = idt77252_init_tx(card, vc, vcc, qos);
2589 if (error)
2590 goto out;
2591 } else {
2592 switch (qos->txtp.traffic_class) {
2593 case ATM_CBR:
2594 error = idt77252_init_cbr(card, vc, vcc, qos);
2595 if (error)
2596 goto out;
2597 break;
2598
2599 case ATM_UBR:
2600 error = idt77252_init_ubr(card, vc, vcc, qos);
2601 if (error)
2602 goto out;
2603
2604 if (!test_bit(VCF_IDLE, &vc->flags)) {
2605 writel(TCMDQ_LACR | (vc->lacr << 16) |
2606 vc->index, SAR_REG_TCMDQ);
2607 }
2608 break;
2609
2610 case ATM_VBR:
2611 case ATM_ABR:
2612 error = -EOPNOTSUPP;
2613 goto out;
2614 }
2615 }
2616 }
2617
2618 if ((qos->rxtp.traffic_class != ATM_NONE) &&
2619 !test_bit(VCF_RX, &vc->flags)) {
2620 error = idt77252_init_rx(card, vc, vcc, qos);
2621 if (error)
2622 goto out;
2623 }
2624
2625 memcpy(&vcc->qos, qos, sizeof(struct atm_qos));
2626
2627 set_bit(ATM_VF_HASQOS, &vcc->flags);
2628
2629 out:
2630 mutex_unlock(&card->mutex);
2631 return error;
2632 }
2633
2634 static int
2635 idt77252_proc_read(struct atm_dev *dev, loff_t * pos, char *page)
2636 {
2637 struct idt77252_dev *card = dev->dev_data;
2638 int i, left;
2639
2640 left = (int) *pos;
2641 if (!left--)
2642 return sprintf(page, "IDT77252 Interrupts:\n");
2643 if (!left--)
2644 return sprintf(page, "TSIF: %lu\n", card->irqstat[15]);
2645 if (!left--)
2646 return sprintf(page, "TXICP: %lu\n", card->irqstat[14]);
2647 if (!left--)
2648 return sprintf(page, "TSQF: %lu\n", card->irqstat[12]);
2649 if (!left--)
2650 return sprintf(page, "TMROF: %lu\n", card->irqstat[11]);
2651 if (!left--)
2652 return sprintf(page, "PHYI: %lu\n", card->irqstat[10]);
2653 if (!left--)
2654 return sprintf(page, "FBQ3A: %lu\n", card->irqstat[8]);
2655 if (!left--)
2656 return sprintf(page, "FBQ2A: %lu\n", card->irqstat[7]);
2657 if (!left--)
2658 return sprintf(page, "RSQF: %lu\n", card->irqstat[6]);
2659 if (!left--)
2660 return sprintf(page, "EPDU: %lu\n", card->irqstat[5]);
2661 if (!left--)
2662 return sprintf(page, "RAWCF: %lu\n", card->irqstat[4]);
2663 if (!left--)
2664 return sprintf(page, "FBQ1A: %lu\n", card->irqstat[3]);
2665 if (!left--)
2666 return sprintf(page, "FBQ0A: %lu\n", card->irqstat[2]);
2667 if (!left--)
2668 return sprintf(page, "RSQAF: %lu\n", card->irqstat[1]);
2669 if (!left--)
2670 return sprintf(page, "IDT77252 Transmit Connection Table:\n");
2671
2672 for (i = 0; i < card->tct_size; i++) {
2673 unsigned long tct;
2674 struct atm_vcc *vcc;
2675 struct vc_map *vc;
2676 char *p;
2677
2678 vc = card->vcs[i];
2679 if (!vc)
2680 continue;
2681
2682 vcc = NULL;
2683 if (vc->tx_vcc)
2684 vcc = vc->tx_vcc;
2685 if (!vcc)
2686 continue;
2687 if (left--)
2688 continue;
2689
2690 p = page;
2691 p += sprintf(p, " %4u: %u.%u: ", i, vcc->vpi, vcc->vci);
2692 tct = (unsigned long) (card->tct_base + i * SAR_SRAM_TCT_SIZE);
2693
2694 for (i = 0; i < 8; i++)
2695 p += sprintf(p, " %08x", read_sram(card, tct + i));
2696 p += sprintf(p, "\n");
2697 return p - page;
2698 }
2699 return 0;
2700 }
2701
2702 /*****************************************************************************/
2703 /* */
2704 /* Interrupt handler */
2705 /* */
2706 /*****************************************************************************/
2707
2708 static void
2709 idt77252_collect_stat(struct idt77252_dev *card)
2710 {
2711 (void) readl(SAR_REG_CDC);
2712 (void) readl(SAR_REG_VPEC);
2713 (void) readl(SAR_REG_ICC);
2714
2715 }
2716
2717 static irqreturn_t
2718 idt77252_interrupt(int irq, void *dev_id)
2719 {
2720 struct idt77252_dev *card = dev_id;
2721 u32 stat;
2722
2723 stat = readl(SAR_REG_STAT) & 0xffff;
2724 if (!stat) /* no interrupt for us */
2725 return IRQ_NONE;
2726
2727 if (test_and_set_bit(IDT77252_BIT_INTERRUPT, &card->flags)) {
2728 printk("%s: Re-entering irq_handler()\n", card->name);
2729 goto out;
2730 }
2731
2732 writel(stat, SAR_REG_STAT); /* reset interrupt */
2733
2734 if (stat & SAR_STAT_TSIF) { /* entry written to TSQ */
2735 INTPRINTK("%s: TSIF\n", card->name);
2736 card->irqstat[15]++;
2737 idt77252_tx(card);
2738 }
2739 if (stat & SAR_STAT_TXICP) { /* Incomplete CS-PDU has */
2740 INTPRINTK("%s: TXICP\n", card->name);
2741 card->irqstat[14]++;
2742 #ifdef CONFIG_ATM_IDT77252_DEBUG
2743 idt77252_tx_dump(card);
2744 #endif
2745 }
2746 if (stat & SAR_STAT_TSQF) { /* TSQ 7/8 full */
2747 INTPRINTK("%s: TSQF\n", card->name);
2748 card->irqstat[12]++;
2749 idt77252_tx(card);
2750 }
2751 if (stat & SAR_STAT_TMROF) { /* Timer overflow */
2752 INTPRINTK("%s: TMROF\n", card->name);
2753 card->irqstat[11]++;
2754 idt77252_collect_stat(card);
2755 }
2756
2757 if (stat & SAR_STAT_EPDU) { /* Got complete CS-PDU */
2758 INTPRINTK("%s: EPDU\n", card->name);
2759 card->irqstat[5]++;
2760 idt77252_rx(card);
2761 }
2762 if (stat & SAR_STAT_RSQAF) { /* RSQ is 7/8 full */
2763 INTPRINTK("%s: RSQAF\n", card->name);
2764 card->irqstat[1]++;
2765 idt77252_rx(card);
2766 }
2767 if (stat & SAR_STAT_RSQF) { /* RSQ is full */
2768 INTPRINTK("%s: RSQF\n", card->name);
2769 card->irqstat[6]++;
2770 idt77252_rx(card);
2771 }
2772 if (stat & SAR_STAT_RAWCF) { /* Raw cell received */
2773 INTPRINTK("%s: RAWCF\n", card->name);
2774 card->irqstat[4]++;
2775 idt77252_rx_raw(card);
2776 }
2777
2778 if (stat & SAR_STAT_PHYI) { /* PHY device interrupt */
2779 INTPRINTK("%s: PHYI", card->name);
2780 card->irqstat[10]++;
2781 if (card->atmdev->phy && card->atmdev->phy->interrupt)
2782 card->atmdev->phy->interrupt(card->atmdev);
2783 }
2784
2785 if (stat & (SAR_STAT_FBQ0A | SAR_STAT_FBQ1A |
2786 SAR_STAT_FBQ2A | SAR_STAT_FBQ3A)) {
2787
2788 writel(readl(SAR_REG_CFG) & ~(SAR_CFG_FBIE), SAR_REG_CFG);
2789
2790 INTPRINTK("%s: FBQA: %04x\n", card->name, stat);
2791
2792 if (stat & SAR_STAT_FBQ0A)
2793 card->irqstat[2]++;
2794 if (stat & SAR_STAT_FBQ1A)
2795 card->irqstat[3]++;
2796 if (stat & SAR_STAT_FBQ2A)
2797 card->irqstat[7]++;
2798 if (stat & SAR_STAT_FBQ3A)
2799 card->irqstat[8]++;
2800
2801 schedule_work(&card->tqueue);
2802 }
2803
2804 out:
2805 clear_bit(IDT77252_BIT_INTERRUPT, &card->flags);
2806 return IRQ_HANDLED;
2807 }
2808
2809 static void
2810 idt77252_softint(struct work_struct *work)
2811 {
2812 struct idt77252_dev *card =
2813 container_of(work, struct idt77252_dev, tqueue);
2814 u32 stat;
2815 int done;
2816
2817 for (done = 1; ; done = 1) {
2818 stat = readl(SAR_REG_STAT) >> 16;
2819
2820 if ((stat & 0x0f) < SAR_FBQ0_HIGH) {
2821 add_rx_skb(card, 0, SAR_FB_SIZE_0, 32);
2822 done = 0;
2823 }
2824
2825 stat >>= 4;
2826 if ((stat & 0x0f) < SAR_FBQ1_HIGH) {
2827 add_rx_skb(card, 1, SAR_FB_SIZE_1, 32);
2828 done = 0;
2829 }
2830
2831 stat >>= 4;
2832 if ((stat & 0x0f) < SAR_FBQ2_HIGH) {
2833 add_rx_skb(card, 2, SAR_FB_SIZE_2, 32);
2834 done = 0;
2835 }
2836
2837 stat >>= 4;
2838 if ((stat & 0x0f) < SAR_FBQ3_HIGH) {
2839 add_rx_skb(card, 3, SAR_FB_SIZE_3, 32);
2840 done = 0;
2841 }
2842
2843 if (done)
2844 break;
2845 }
2846
2847 writel(readl(SAR_REG_CFG) | SAR_CFG_FBIE, SAR_REG_CFG);
2848 }
2849
2850
2851 static int
2852 open_card_oam(struct idt77252_dev *card)
2853 {
2854 unsigned long flags;
2855 unsigned long addr;
2856 struct vc_map *vc;
2857 int vpi, vci;
2858 int index;
2859 u32 rcte;
2860
2861 for (vpi = 0; vpi < (1 << card->vpibits); vpi++) {
2862 for (vci = 3; vci < 5; vci++) {
2863 index = VPCI2VC(card, vpi, vci);
2864
2865 vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2866 if (!vc) {
2867 printk("%s: can't alloc vc\n", card->name);
2868 return -ENOMEM;
2869 }
2870 vc->index = index;
2871 card->vcs[index] = vc;
2872
2873 flush_rx_pool(card, &vc->rcv.rx_pool);
2874
2875 rcte = SAR_RCTE_CONNECTOPEN |
2876 SAR_RCTE_RAWCELLINTEN |
2877 SAR_RCTE_RCQ |
2878 SAR_RCTE_FBP_1;
2879
2880 addr = card->rct_base + (vc->index << 2);
2881 write_sram(card, addr, rcte);
2882
2883 spin_lock_irqsave(&card->cmd_lock, flags);
2884 writel(SAR_CMD_OPEN_CONNECTION | (addr << 2),
2885 SAR_REG_CMD);
2886 waitfor_idle(card);
2887 spin_unlock_irqrestore(&card->cmd_lock, flags);
2888 }
2889 }
2890
2891 return 0;
2892 }
2893
2894 static void
2895 close_card_oam(struct idt77252_dev *card)
2896 {
2897 unsigned long flags;
2898 unsigned long addr;
2899 struct vc_map *vc;
2900 int vpi, vci;
2901 int index;
2902
2903 for (vpi = 0; vpi < (1 << card->vpibits); vpi++) {
2904 for (vci = 3; vci < 5; vci++) {
2905 index = VPCI2VC(card, vpi, vci);
2906 vc = card->vcs[index];
2907
2908 addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE;
2909
2910 spin_lock_irqsave(&card->cmd_lock, flags);
2911 writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2),
2912 SAR_REG_CMD);
2913 waitfor_idle(card);
2914 spin_unlock_irqrestore(&card->cmd_lock, flags);
2915
2916 if (skb_queue_len(&vc->rcv.rx_pool.queue) != 0) {
2917 DPRINTK("%s: closing a VC "
2918 "with pending rx buffers.\n",
2919 card->name);
2920
2921 recycle_rx_pool_skb(card, &vc->rcv.rx_pool);
2922 }
2923 }
2924 }
2925 }
2926
2927 static int
2928 open_card_ubr0(struct idt77252_dev *card)
2929 {
2930 struct vc_map *vc;
2931
2932 vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2933 if (!vc) {
2934 printk("%s: can't alloc vc\n", card->name);
2935 return -ENOMEM;
2936 }
2937 card->vcs[0] = vc;
2938 vc->class = SCHED_UBR0;
2939
2940 vc->scq = alloc_scq(card, vc->class);
2941 if (!vc->scq) {
2942 printk("%s: can't get SCQ.\n", card->name);
2943 return -ENOMEM;
2944 }
2945
2946 card->scd2vc[0] = vc;
2947 vc->scd_index = 0;
2948 vc->scq->scd = card->scd_base;
2949
2950 fill_scd(card, vc->scq, vc->class);
2951
2952 write_sram(card, card->tct_base + 0, TCT_UBR | card->scd_base);
2953 write_sram(card, card->tct_base + 1, 0);
2954 write_sram(card, card->tct_base + 2, 0);
2955 write_sram(card, card->tct_base + 3, 0);
2956 write_sram(card, card->tct_base + 4, 0);
2957 write_sram(card, card->tct_base + 5, 0);
2958 write_sram(card, card->tct_base + 6, 0);
2959 write_sram(card, card->tct_base + 7, TCT_FLAG_UBR);
2960
2961 clear_bit(VCF_IDLE, &vc->flags);
2962 writel(TCMDQ_START | 0, SAR_REG_TCMDQ);
2963 return 0;
2964 }
2965
2966 static int
2967 idt77252_dev_open(struct idt77252_dev *card)
2968 {
2969 u32 conf;
2970
2971 if (!test_bit(IDT77252_BIT_INIT, &card->flags)) {
2972 printk("%s: SAR not yet initialized.\n", card->name);
2973 return -1;
2974 }
2975
2976 conf = SAR_CFG_RXPTH| /* enable receive path */
2977 SAR_RX_DELAY | /* interrupt on complete PDU */
2978 SAR_CFG_RAWIE | /* interrupt enable on raw cells */
2979 SAR_CFG_RQFIE | /* interrupt on RSQ almost full */
2980 SAR_CFG_TMOIE | /* interrupt on timer overflow */
2981 SAR_CFG_FBIE | /* interrupt on low free buffers */
2982 SAR_CFG_TXEN | /* transmit operation enable */
2983 SAR_CFG_TXINT | /* interrupt on transmit status */
2984 SAR_CFG_TXUIE | /* interrupt on transmit underrun */
2985 SAR_CFG_TXSFI | /* interrupt on TSQ almost full */
2986 SAR_CFG_PHYIE /* enable PHY interrupts */
2987 ;
2988
2989 #ifdef CONFIG_ATM_IDT77252_RCV_ALL
2990 /* Test RAW cell receive. */
2991 conf |= SAR_CFG_VPECA;
2992 #endif
2993
2994 writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG);
2995
2996 if (open_card_oam(card)) {
2997 printk("%s: Error initializing OAM.\n", card->name);
2998 return -1;
2999 }
3000
3001 if (open_card_ubr0(card)) {
3002 printk("%s: Error initializing UBR0.\n", card->name);
3003 return -1;
3004 }
3005
3006 IPRINTK("%s: opened IDT77252 ABR SAR.\n", card->name);
3007 return 0;
3008 }
3009
3010 static void idt77252_dev_close(struct atm_dev *dev)
3011 {
3012 struct idt77252_dev *card = dev->dev_data;
3013 u32 conf;
3014
3015 close_card_oam(card);
3016
3017 conf = SAR_CFG_RXPTH | /* enable receive path */
3018 SAR_RX_DELAY | /* interrupt on complete PDU */
3019 SAR_CFG_RAWIE | /* interrupt enable on raw cells */
3020 SAR_CFG_RQFIE | /* interrupt on RSQ almost full */
3021 SAR_CFG_TMOIE | /* interrupt on timer overflow */
3022 SAR_CFG_FBIE | /* interrupt on low free buffers */
3023 SAR_CFG_TXEN | /* transmit operation enable */
3024 SAR_CFG_TXINT | /* interrupt on transmit status */
3025 SAR_CFG_TXUIE | /* interrupt on xmit underrun */
3026 SAR_CFG_TXSFI /* interrupt on TSQ almost full */
3027 ;
3028
3029 writel(readl(SAR_REG_CFG) & ~(conf), SAR_REG_CFG);
3030
3031 DIPRINTK("%s: closed IDT77252 ABR SAR.\n", card->name);
3032 }
3033
3034
3035 /*****************************************************************************/
3036 /* */
3037 /* Initialisation and Deinitialization of IDT77252 */
3038 /* */
3039 /*****************************************************************************/
3040
3041
3042 static void
3043 deinit_card(struct idt77252_dev *card)
3044 {
3045 struct sk_buff *skb;
3046 int i, j;
3047
3048 if (!test_bit(IDT77252_BIT_INIT, &card->flags)) {
3049 printk("%s: SAR not yet initialized.\n", card->name);
3050 return;
3051 }
3052 DIPRINTK("idt77252: deinitialize card %u\n", card->index);
3053
3054 writel(0, SAR_REG_CFG);
3055
3056 if (card->atmdev)
3057 atm_dev_deregister(card->atmdev);
3058
3059 for (i = 0; i < 4; i++) {
3060 for (j = 0; j < FBQ_SIZE; j++) {
3061 skb = card->sbpool[i].skb[j];
3062 if (skb) {
3063 pci_unmap_single(card->pcidev,
3064 IDT77252_PRV_PADDR(skb),
3065 (skb_end_pointer(skb) -
3066 skb->data),
3067 PCI_DMA_FROMDEVICE);
3068 card->sbpool[i].skb[j] = NULL;
3069 dev_kfree_skb(skb);
3070 }
3071 }
3072 }
3073
3074 vfree(card->soft_tst);
3075
3076 vfree(card->scd2vc);
3077
3078 vfree(card->vcs);
3079
3080 if (card->raw_cell_hnd) {
3081 pci_free_consistent(card->pcidev, 2 * sizeof(u32),
3082 card->raw_cell_hnd, card->raw_cell_paddr);
3083 }
3084
3085 if (card->rsq.base) {
3086 DIPRINTK("%s: Release RSQ ...\n", card->name);
3087 deinit_rsq(card);
3088 }
3089
3090 if (card->tsq.base) {
3091 DIPRINTK("%s: Release TSQ ...\n", card->name);
3092 deinit_tsq(card);
3093 }
3094
3095 DIPRINTK("idt77252: Release IRQ.\n");
3096 free_irq(card->pcidev->irq, card);
3097
3098 for (i = 0; i < 4; i++) {
3099 if (card->fbq[i])
3100 iounmap(card->fbq[i]);
3101 }
3102
3103 if (card->membase)
3104 iounmap(card->membase);
3105
3106 clear_bit(IDT77252_BIT_INIT, &card->flags);
3107 DIPRINTK("%s: Card deinitialized.\n", card->name);
3108 }
3109
3110
3111 static void __devinit
3112 init_sram(struct idt77252_dev *card)
3113 {
3114 int i;
3115
3116 for (i = 0; i < card->sramsize; i += 4)
3117 write_sram(card, (i >> 2), 0);
3118
3119 /* set SRAM layout for THIS card */
3120 if (card->sramsize == (512 * 1024)) {
3121 card->tct_base = SAR_SRAM_TCT_128_BASE;
3122 card->tct_size = (SAR_SRAM_TCT_128_TOP - card->tct_base + 1)
3123 / SAR_SRAM_TCT_SIZE;
3124 card->rct_base = SAR_SRAM_RCT_128_BASE;
3125 card->rct_size = (SAR_SRAM_RCT_128_TOP - card->rct_base + 1)
3126 / SAR_SRAM_RCT_SIZE;
3127 card->rt_base = SAR_SRAM_RT_128_BASE;
3128 card->scd_base = SAR_SRAM_SCD_128_BASE;
3129 card->scd_size = (SAR_SRAM_SCD_128_TOP - card->scd_base + 1)
3130 / SAR_SRAM_SCD_SIZE;
3131 card->tst[0] = SAR_SRAM_TST1_128_BASE;
3132 card->tst[1] = SAR_SRAM_TST2_128_BASE;
3133 card->tst_size = SAR_SRAM_TST1_128_TOP - card->tst[0] + 1;
3134 card->abrst_base = SAR_SRAM_ABRSTD_128_BASE;
3135 card->abrst_size = SAR_ABRSTD_SIZE_8K;
3136 card->fifo_base = SAR_SRAM_FIFO_128_BASE;
3137 card->fifo_size = SAR_RXFD_SIZE_32K;
3138 } else {
3139 card->tct_base = SAR_SRAM_TCT_32_BASE;
3140 card->tct_size = (SAR_SRAM_TCT_32_TOP - card->tct_base + 1)
3141 / SAR_SRAM_TCT_SIZE;
3142 card->rct_base = SAR_SRAM_RCT_32_BASE;
3143 card->rct_size = (SAR_SRAM_RCT_32_TOP - card->rct_base + 1)
3144 / SAR_SRAM_RCT_SIZE;
3145 card->rt_base = SAR_SRAM_RT_32_BASE;
3146 card->scd_base = SAR_SRAM_SCD_32_BASE;
3147 card->scd_size = (SAR_SRAM_SCD_32_TOP - card->scd_base + 1)
3148 / SAR_SRAM_SCD_SIZE;
3149 card->tst[0] = SAR_SRAM_TST1_32_BASE;
3150 card->tst[1] = SAR_SRAM_TST2_32_BASE;
3151 card->tst_size = (SAR_SRAM_TST1_32_TOP - card->tst[0] + 1);
3152 card->abrst_base = SAR_SRAM_ABRSTD_32_BASE;
3153 card->abrst_size = SAR_ABRSTD_SIZE_1K;
3154 card->fifo_base = SAR_SRAM_FIFO_32_BASE;
3155 card->fifo_size = SAR_RXFD_SIZE_4K;
3156 }
3157
3158 /* Initialize TCT */
3159 for (i = 0; i < card->tct_size; i++) {
3160 write_sram(card, i * SAR_SRAM_TCT_SIZE + 0, 0);
3161 write_sram(card, i * SAR_SRAM_TCT_SIZE + 1, 0);
3162 write_sram(card, i * SAR_SRAM_TCT_SIZE + 2, 0);
3163 write_sram(card, i * SAR_SRAM_TCT_SIZE + 3, 0);
3164 write_sram(card, i * SAR_SRAM_TCT_SIZE + 4, 0);
3165 write_sram(card, i * SAR_SRAM_TCT_SIZE + 5, 0);
3166 write_sram(card, i * SAR_SRAM_TCT_SIZE + 6, 0);
3167 write_sram(card, i * SAR_SRAM_TCT_SIZE + 7, 0);
3168 }
3169
3170 /* Initialize RCT */
3171 for (i = 0; i < card->rct_size; i++) {
3172 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE,
3173 (u32) SAR_RCTE_RAWCELLINTEN);
3174 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 1,
3175 (u32) 0);
3176 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 2,
3177 (u32) 0);
3178 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 3,
3179 (u32) 0xffffffff);
3180 }
3181
3182 writel((SAR_FBQ0_LOW << 28) | 0x00000000 | 0x00000000 |
3183 (SAR_FB_SIZE_0 / 48), SAR_REG_FBQS0);
3184 writel((SAR_FBQ1_LOW << 28) | 0x00000000 | 0x00000000 |
3185 (SAR_FB_SIZE_1 / 48), SAR_REG_FBQS1);
3186 writel((SAR_FBQ2_LOW << 28) | 0x00000000 | 0x00000000 |
3187 (SAR_FB_SIZE_2 / 48), SAR_REG_FBQS2);
3188 writel((SAR_FBQ3_LOW << 28) | 0x00000000 | 0x00000000 |
3189 (SAR_FB_SIZE_3 / 48), SAR_REG_FBQS3);
3190
3191 /* Initialize rate table */
3192 for (i = 0; i < 256; i++) {
3193 write_sram(card, card->rt_base + i, log_to_rate[i]);
3194 }
3195
3196 for (i = 0; i < 128; i++) {
3197 unsigned int tmp;
3198
3199 tmp = rate_to_log[(i << 2) + 0] << 0;
3200 tmp |= rate_to_log[(i << 2) + 1] << 8;
3201 tmp |= rate_to_log[(i << 2) + 2] << 16;
3202 tmp |= rate_to_log[(i << 2) + 3] << 24;
3203 write_sram(card, card->rt_base + 256 + i, tmp);
3204 }
3205
3206 #if 0 /* Fill RDF and AIR tables. */
3207 for (i = 0; i < 128; i++) {
3208 unsigned int tmp;
3209
3210 tmp = RDF[0][(i << 1) + 0] << 16;
3211 tmp |= RDF[0][(i << 1) + 1] << 0;
3212 write_sram(card, card->rt_base + 512 + i, tmp);
3213 }
3214
3215 for (i = 0; i < 128; i++) {
3216 unsigned int tmp;
3217
3218 tmp = AIR[0][(i << 1) + 0] << 16;
3219 tmp |= AIR[0][(i << 1) + 1] << 0;
3220 write_sram(card, card->rt_base + 640 + i, tmp);
3221 }
3222 #endif
3223
3224 IPRINTK("%s: initialize rate table ...\n", card->name);
3225 writel(card->rt_base << 2, SAR_REG_RTBL);
3226
3227 /* Initialize TSTs */
3228 IPRINTK("%s: initialize TST ...\n", card->name);
3229 card->tst_free = card->tst_size - 2; /* last two are jumps */
3230
3231 for (i = card->tst[0]; i < card->tst[0] + card->tst_size - 2; i++)
3232 write_sram(card, i, TSTE_OPC_VAR);
3233 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2));
3234 idt77252_sram_write_errors = 1;
3235 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2));
3236 idt77252_sram_write_errors = 0;
3237 for (i = card->tst[1]; i < card->tst[1] + card->tst_size - 2; i++)
3238 write_sram(card, i, TSTE_OPC_VAR);
3239 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2));
3240 idt77252_sram_write_errors = 1;
3241 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2));
3242 idt77252_sram_write_errors = 0;
3243
3244 card->tst_index = 0;
3245 writel(card->tst[0] << 2, SAR_REG_TSTB);
3246
3247 /* Initialize ABRSTD and Receive FIFO */
3248 IPRINTK("%s: initialize ABRSTD ...\n", card->name);
3249 writel(card->abrst_size | (card->abrst_base << 2),
3250 SAR_REG_ABRSTD);
3251
3252 IPRINTK("%s: initialize receive fifo ...\n", card->name);
3253 writel(card->fifo_size | (card->fifo_base << 2),
3254 SAR_REG_RXFD);
3255
3256 IPRINTK("%s: SRAM initialization complete.\n", card->name);
3257 }
3258
3259 static int __devinit
3260 init_card(struct atm_dev *dev)
3261 {
3262 struct idt77252_dev *card = dev->dev_data;
3263 struct pci_dev *pcidev = card->pcidev;
3264 unsigned long tmpl, modl;
3265 unsigned int linkrate, rsvdcr;
3266 unsigned int tst_entries;
3267 struct net_device *tmp;
3268 char tname[10];
3269
3270 u32 size;
3271 u_char pci_byte;
3272 u32 conf;
3273 int i, k;
3274
3275 if (test_bit(IDT77252_BIT_INIT, &card->flags)) {
3276 printk("Error: SAR already initialized.\n");
3277 return -1;
3278 }
3279
3280 /*****************************************************************/
3281 /* P C I C O N F I G U R A T I O N */
3282 /*****************************************************************/
3283
3284 /* Set PCI Retry-Timeout and TRDY timeout */
3285 IPRINTK("%s: Checking PCI retries.\n", card->name);
3286 if (pci_read_config_byte(pcidev, 0x40, &pci_byte) != 0) {
3287 printk("%s: can't read PCI retry timeout.\n", card->name);
3288 deinit_card(card);
3289 return -1;
3290 }
3291 if (pci_byte != 0) {
3292 IPRINTK("%s: PCI retry timeout: %d, set to 0.\n",
3293 card->name, pci_byte);
3294 if (pci_write_config_byte(pcidev, 0x40, 0) != 0) {
3295 printk("%s: can't set PCI retry timeout.\n",
3296 card->name);
3297 deinit_card(card);
3298 return -1;
3299 }
3300 }
3301 IPRINTK("%s: Checking PCI TRDY.\n", card->name);
3302 if (pci_read_config_byte(pcidev, 0x41, &pci_byte) != 0) {
3303 printk("%s: can't read PCI TRDY timeout.\n", card->name);
3304 deinit_card(card);
3305 return -1;
3306 }
3307 if (pci_byte != 0) {
3308 IPRINTK("%s: PCI TRDY timeout: %d, set to 0.\n",
3309 card->name, pci_byte);
3310 if (pci_write_config_byte(pcidev, 0x41, 0) != 0) {
3311 printk("%s: can't set PCI TRDY timeout.\n", card->name);
3312 deinit_card(card);
3313 return -1;
3314 }
3315 }
3316 /* Reset Timer register */
3317 if (readl(SAR_REG_STAT) & SAR_STAT_TMROF) {
3318 printk("%s: resetting timer overflow.\n", card->name);
3319 writel(SAR_STAT_TMROF, SAR_REG_STAT);
3320 }
3321 IPRINTK("%s: Request IRQ ... ", card->name);
3322 if (request_irq(pcidev->irq, idt77252_interrupt, IRQF_SHARED,
3323 card->name, card) != 0) {
3324 printk("%s: can't allocate IRQ.\n", card->name);
3325 deinit_card(card);
3326 return -1;
3327 }
3328 IPRINTK("got %d.\n", pcidev->irq);
3329
3330 /*****************************************************************/
3331 /* C H E C K A N D I N I T S R A M */
3332 /*****************************************************************/
3333
3334 IPRINTK("%s: Initializing SRAM\n", card->name);
3335
3336 /* preset size of connecton table, so that init_sram() knows about it */
3337 conf = SAR_CFG_TX_FIFO_SIZE_9 | /* Use maximum fifo size */
3338 SAR_CFG_RXSTQ_SIZE_8k | /* Receive Status Queue is 8k */
3339 SAR_CFG_IDLE_CLP | /* Set CLP on idle cells */
3340 #ifndef ATM_IDT77252_SEND_IDLE
3341 SAR_CFG_NO_IDLE | /* Do not send idle cells */
3342 #endif
3343 0;
3344
3345 if (card->sramsize == (512 * 1024))
3346 conf |= SAR_CFG_CNTBL_1k;
3347 else
3348 conf |= SAR_CFG_CNTBL_512;
3349
3350 switch (vpibits) {
3351 case 0:
3352 conf |= SAR_CFG_VPVCS_0;
3353 break;
3354 default:
3355 case 1:
3356 conf |= SAR_CFG_VPVCS_1;
3357 break;
3358 case 2:
3359 conf |= SAR_CFG_VPVCS_2;
3360 break;
3361 case 8:
3362 conf |= SAR_CFG_VPVCS_8;
3363 break;
3364 }
3365
3366 writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG);
3367
3368 init_sram(card);
3369
3370 /********************************************************************/
3371 /* A L L O C R A M A N D S E T V A R I O U S T H I N G S */
3372 /********************************************************************/
3373 /* Initialize TSQ */
3374 if (0 != init_tsq(card)) {
3375 deinit_card(card);
3376 return -1;
3377 }
3378 /* Initialize RSQ */
3379 if (0 != init_rsq(card)) {
3380 deinit_card(card);
3381 return -1;
3382 }
3383
3384 card->vpibits = vpibits;
3385 if (card->sramsize == (512 * 1024)) {
3386 card->vcibits = 10 - card->vpibits;
3387 } else {
3388 card->vcibits = 9 - card->vpibits;
3389 }
3390
3391 card->vcimask = 0;
3392 for (k = 0, i = 1; k < card->vcibits; k++) {
3393 card->vcimask |= i;
3394 i <<= 1;
3395 }
3396
3397 IPRINTK("%s: Setting VPI/VCI mask to zero.\n", card->name);
3398 writel(0, SAR_REG_VPM);
3399
3400 /* Little Endian Order */
3401 writel(0, SAR_REG_GP);
3402
3403 /* Initialize RAW Cell Handle Register */
3404 card->raw_cell_hnd = pci_alloc_consistent(card->pcidev, 2 * sizeof(u32),
3405 &card->raw_cell_paddr);
3406 if (!card->raw_cell_hnd) {
3407 printk("%s: memory allocation failure.\n", card->name);
3408 deinit_card(card);
3409 return -1;
3410 }
3411 memset(card->raw_cell_hnd, 0, 2 * sizeof(u32));
3412 writel(card->raw_cell_paddr, SAR_REG_RAWHND);
3413 IPRINTK("%s: raw cell handle is at 0x%p.\n", card->name,
3414 card->raw_cell_hnd);
3415
3416 size = sizeof(struct vc_map *) * card->tct_size;
3417 IPRINTK("%s: allocate %d byte for VC map.\n", card->name, size);
3418 if (NULL == (card->vcs = vmalloc(size))) {
3419 printk("%s: memory allocation failure.\n", card->name);
3420 deinit_card(card);
3421 return -1;
3422 }
3423 memset(card->vcs, 0, size);
3424
3425 size = sizeof(struct vc_map *) * card->scd_size;
3426 IPRINTK("%s: allocate %d byte for SCD to VC mapping.\n",
3427 card->name, size);
3428 if (NULL == (card->scd2vc = vmalloc(size))) {
3429 printk("%s: memory allocation failure.\n", card->name);
3430 deinit_card(card);
3431 return -1;
3432 }
3433 memset(card->scd2vc, 0, size);
3434
3435 size = sizeof(struct tst_info) * (card->tst_size - 2);
3436 IPRINTK("%s: allocate %d byte for TST to VC mapping.\n",
3437 card->name, size);
3438 if (NULL == (card->soft_tst = vmalloc(size))) {
3439 printk("%s: memory allocation failure.\n", card->name);
3440 deinit_card(card);
3441 return -1;
3442 }
3443 for (i = 0; i < card->tst_size - 2; i++) {
3444 card->soft_tst[i].tste = TSTE_OPC_VAR;
3445 card->soft_tst[i].vc = NULL;
3446 }
3447
3448 if (dev->phy == NULL) {
3449 printk("%s: No LT device defined.\n", card->name);
3450 deinit_card(card);
3451 return -1;
3452 }
3453 if (dev->phy->ioctl == NULL) {
3454 printk("%s: LT had no IOCTL function defined.\n", card->name);
3455 deinit_card(card);
3456 return -1;
3457 }
3458
3459 #ifdef CONFIG_ATM_IDT77252_USE_SUNI
3460 /*
3461 * this is a jhs hack to get around special functionality in the
3462 * phy driver for the atecom hardware; the functionality doesn't
3463 * exist in the linux atm suni driver
3464 *
3465 * it isn't the right way to do things, but as the guy from NIST
3466 * said, talking about their measurement of the fine structure
3467 * constant, "it's good enough for government work."
3468 */
3469 linkrate = 149760000;
3470 #endif
3471
3472 card->link_pcr = (linkrate / 8 / 53);
3473 printk("%s: Linkrate on ATM line : %u bit/s, %u cell/s.\n",
3474 card->name, linkrate, card->link_pcr);
3475
3476 #ifdef ATM_IDT77252_SEND_IDLE
3477 card->utopia_pcr = card->link_pcr;
3478 #else
3479 card->utopia_pcr = (160000000 / 8 / 54);
3480 #endif
3481
3482 rsvdcr = 0;
3483 if (card->utopia_pcr > card->link_pcr)
3484 rsvdcr = card->utopia_pcr - card->link_pcr;
3485
3486 tmpl = (unsigned long) rsvdcr * ((unsigned long) card->tst_size - 2);
3487 modl = tmpl % (unsigned long)card->utopia_pcr;
3488 tst_entries = (int) (tmpl / (unsigned long)card->utopia_pcr);
3489 if (modl)
3490 tst_entries++;
3491 card->tst_free -= tst_entries;
3492 fill_tst(card, NULL, tst_entries, TSTE_OPC_NULL);
3493
3494 #ifdef HAVE_EEPROM
3495 idt77252_eeprom_init(card);
3496 printk("%s: EEPROM: %02x:", card->name,
3497 idt77252_eeprom_read_status(card));
3498
3499 for (i = 0; i < 0x80; i++) {
3500 printk(" %02x",
3501 idt77252_eeprom_read_byte(card, i)
3502 );
3503 }
3504 printk("\n");
3505 #endif /* HAVE_EEPROM */
3506
3507 /*
3508 * XXX: <hack>
3509 */
3510 sprintf(tname, "eth%d", card->index);
3511 tmp = dev_get_by_name(&init_net, tname); /* jhs: was "tmp = dev_get(tname);" */
3512 if (tmp) {
3513 memcpy(card->atmdev->esi, tmp->dev_addr, 6);
3514
3515 printk("%s: ESI %pM\n", card->name, card->atmdev->esi);
3516 }
3517 /*
3518 * XXX: </hack>
3519 */
3520
3521 /* Set Maximum Deficit Count for now. */
3522 writel(0xffff, SAR_REG_MDFCT);
3523
3524 set_bit(IDT77252_BIT_INIT, &card->flags);
3525
3526 XPRINTK("%s: IDT77252 ABR SAR initialization complete.\n", card->name);
3527 return 0;
3528 }
3529
3530
3531 /*****************************************************************************/
3532 /* */
3533 /* Probing of IDT77252 ABR SAR */
3534 /* */
3535 /*****************************************************************************/
3536
3537
3538 static int __devinit
3539 idt77252_preset(struct idt77252_dev *card)
3540 {
3541 u16 pci_command;
3542
3543 /*****************************************************************/
3544 /* P C I C O N F I G U R A T I O N */
3545 /*****************************************************************/
3546
3547 XPRINTK("%s: Enable PCI master and memory access for SAR.\n",
3548 card->name);
3549 if (pci_read_config_word(card->pcidev, PCI_COMMAND, &pci_command)) {
3550 printk("%s: can't read PCI_COMMAND.\n", card->name);
3551 deinit_card(card);
3552 return -1;
3553 }
3554 if (!(pci_command & PCI_COMMAND_IO)) {
3555 printk("%s: PCI_COMMAND: %04x (???)\n",
3556 card->name, pci_command);
3557 deinit_card(card);
3558 return (-1);
3559 }
3560 pci_command |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
3561 if (pci_write_config_word(card->pcidev, PCI_COMMAND, pci_command)) {
3562 printk("%s: can't write PCI_COMMAND.\n", card->name);
3563 deinit_card(card);
3564 return -1;
3565 }
3566 /*****************************************************************/
3567 /* G E N E R I C R E S E T */
3568 /*****************************************************************/
3569
3570 /* Software reset */
3571 writel(SAR_CFG_SWRST, SAR_REG_CFG);
3572 mdelay(1);
3573 writel(0, SAR_REG_CFG);
3574
3575 IPRINTK("%s: Software resetted.\n", card->name);
3576 return 0;
3577 }
3578
3579
3580 static unsigned long __devinit
3581 probe_sram(struct idt77252_dev *card)
3582 {
3583 u32 data, addr;
3584
3585 writel(0, SAR_REG_DR0);
3586 writel(SAR_CMD_WRITE_SRAM | (0 << 2), SAR_REG_CMD);
3587
3588 for (addr = 0x4000; addr < 0x80000; addr += 0x4000) {
3589 writel(ATM_POISON, SAR_REG_DR0);
3590 writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD);
3591
3592 writel(SAR_CMD_READ_SRAM | (0 << 2), SAR_REG_CMD);
3593 data = readl(SAR_REG_DR0);
3594
3595 if (data != 0)
3596 break;
3597 }
3598
3599 return addr * sizeof(u32);
3600 }
3601
3602 static int __devinit
3603 idt77252_init_one(struct pci_dev *pcidev, const struct pci_device_id *id)
3604 {
3605 static struct idt77252_dev **last = &idt77252_chain;
3606 static int index = 0;
3607
3608 unsigned long membase, srambase;
3609 struct idt77252_dev *card;
3610 struct atm_dev *dev;
3611 int i, err;
3612
3613
3614 if ((err = pci_enable_device(pcidev))) {
3615 printk("idt77252: can't enable PCI device at %s\n", pci_name(pcidev));
3616 return err;
3617 }
3618
3619 card = kzalloc(sizeof(struct idt77252_dev), GFP_KERNEL);
3620 if (!card) {
3621 printk("idt77252-%d: can't allocate private data\n", index);
3622 err = -ENOMEM;
3623 goto err_out_disable_pdev;
3624 }
3625 card->revision = pcidev->revision;
3626 card->index = index;
3627 card->pcidev = pcidev;
3628 sprintf(card->name, "idt77252-%d", card->index);
3629
3630 INIT_WORK(&card->tqueue, idt77252_softint);
3631
3632 membase = pci_resource_start(pcidev, 1);
3633 srambase = pci_resource_start(pcidev, 2);
3634
3635 mutex_init(&card->mutex);
3636 spin_lock_init(&card->cmd_lock);
3637 spin_lock_init(&card->tst_lock);
3638
3639 init_timer(&card->tst_timer);
3640 card->tst_timer.data = (unsigned long)card;
3641 card->tst_timer.function = tst_timer;
3642
3643 /* Do the I/O remapping... */
3644 card->membase = ioremap(membase, 1024);
3645 if (!card->membase) {
3646 printk("%s: can't ioremap() membase\n", card->name);
3647 err = -EIO;
3648 goto err_out_free_card;
3649 }
3650
3651 if (idt77252_preset(card)) {
3652 printk("%s: preset failed\n", card->name);
3653 err = -EIO;
3654 goto err_out_iounmap;
3655 }
3656
3657 dev = atm_dev_register("idt77252", &pcidev->dev, &idt77252_ops, -1,
3658 NULL);
3659 if (!dev) {
3660 printk("%s: can't register atm device\n", card->name);
3661 err = -EIO;
3662 goto err_out_iounmap;
3663 }
3664 dev->dev_data = card;
3665 card->atmdev = dev;
3666
3667 #ifdef CONFIG_ATM_IDT77252_USE_SUNI
3668 suni_init(dev);
3669 if (!dev->phy) {
3670 printk("%s: can't init SUNI\n", card->name);
3671 err = -EIO;
3672 goto err_out_deinit_card;
3673 }
3674 #endif /* CONFIG_ATM_IDT77252_USE_SUNI */
3675
3676 card->sramsize = probe_sram(card);
3677
3678 for (i = 0; i < 4; i++) {
3679 card->fbq[i] = ioremap(srambase | 0x200000 | (i << 18), 4);
3680 if (!card->fbq[i]) {
3681 printk("%s: can't ioremap() FBQ%d\n", card->name, i);
3682 err = -EIO;
3683 goto err_out_deinit_card;
3684 }
3685 }
3686
3687 printk("%s: ABR SAR (Rev %c): MEM %08lx SRAM %08lx [%u KB]\n",
3688 card->name, ((card->revision > 1) && (card->revision < 25)) ?
3689 'A' + card->revision - 1 : '?', membase, srambase,
3690 card->sramsize / 1024);
3691
3692 if (init_card(dev)) {
3693 printk("%s: init_card failed\n", card->name);
3694 err = -EIO;
3695 goto err_out_deinit_card;
3696 }
3697
3698 dev->ci_range.vpi_bits = card->vpibits;
3699 dev->ci_range.vci_bits = card->vcibits;
3700 dev->link_rate = card->link_pcr;
3701
3702 if (dev->phy->start)
3703 dev->phy->start(dev);
3704
3705 if (idt77252_dev_open(card)) {
3706 printk("%s: dev_open failed\n", card->name);
3707 err = -EIO;
3708 goto err_out_stop;
3709 }
3710
3711 *last = card;
3712 last = &card->next;
3713 index++;
3714
3715 return 0;
3716
3717 err_out_stop:
3718 if (dev->phy->stop)
3719 dev->phy->stop(dev);
3720
3721 err_out_deinit_card:
3722 deinit_card(card);
3723
3724 err_out_iounmap:
3725 iounmap(card->membase);
3726
3727 err_out_free_card:
3728 kfree(card);
3729
3730 err_out_disable_pdev:
3731 pci_disable_device(pcidev);
3732 return err;
3733 }
3734
3735 static struct pci_device_id idt77252_pci_tbl[] =
3736 {
3737 { PCI_VDEVICE(IDT, PCI_DEVICE_ID_IDT_IDT77252), 0 },
3738 { 0, }
3739 };
3740
3741 MODULE_DEVICE_TABLE(pci, idt77252_pci_tbl);
3742
3743 static struct pci_driver idt77252_driver = {
3744 .name = "idt77252",
3745 .id_table = idt77252_pci_tbl,
3746 .probe = idt77252_init_one,
3747 };
3748
3749 static int __init idt77252_init(void)
3750 {
3751 struct sk_buff *skb;
3752
3753 printk("%s: at %p\n", __func__, idt77252_init);
3754
3755 if (sizeof(skb->cb) < sizeof(struct atm_skb_data) +
3756 sizeof(struct idt77252_skb_prv)) {
3757 printk(KERN_ERR "%s: skb->cb is too small (%lu < %lu)\n",
3758 __func__, (unsigned long) sizeof(skb->cb),
3759 (unsigned long) sizeof(struct atm_skb_data) +
3760 sizeof(struct idt77252_skb_prv));
3761 return -EIO;
3762 }
3763
3764 return pci_register_driver(&idt77252_driver);
3765 }
3766
3767 static void __exit idt77252_exit(void)
3768 {
3769 struct idt77252_dev *card;
3770 struct atm_dev *dev;
3771
3772 pci_unregister_driver(&idt77252_driver);
3773
3774 while (idt77252_chain) {
3775 card = idt77252_chain;
3776 dev = card->atmdev;
3777 idt77252_chain = card->next;
3778
3779 if (dev->phy->stop)
3780 dev->phy->stop(dev);
3781 deinit_card(card);
3782 pci_disable_device(card->pcidev);
3783 kfree(card);
3784 }
3785
3786 DIPRINTK("idt77252: finished cleanup-module().\n");
3787 }
3788
3789 module_init(idt77252_init);
3790 module_exit(idt77252_exit);
3791
3792 MODULE_LICENSE("GPL");
3793
3794 module_param(vpibits, uint, 0);
3795 MODULE_PARM_DESC(vpibits, "number of VPI bits supported (0, 1, or 2)");
3796 #ifdef CONFIG_ATM_IDT77252_DEBUG
3797 module_param(debug, ulong, 0644);
3798 MODULE_PARM_DESC(debug, "debug bitmap, see drivers/atm/idt77252.h");
3799 #endif
3800
3801 MODULE_AUTHOR("Eddie C. Dost <ecd@atecom.com>");
3802 MODULE_DESCRIPTION("IDT77252 ABR SAR Driver");
linux-next