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signals: dequeue_signal: don't check SIGNAL_GROUP_EXIT when setting SIGNAL_STOP_DEQUEUED
[linux-2.6/mini2440.git] / drivers / atm / idt77252.c
blob3a504e94a4d9439c5c017c5d32797218a03294fe
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
45 #include <asm/io.h>
46 #include <asm/uaccess.h>
47 #include <asm/atomic.h>
48 #include <asm/byteorder.h>
49
50 #ifdef CONFIG_ATM_IDT77252_USE_SUNI
51 #include "suni.h"
52 #endif /* CONFIG_ATM_IDT77252_USE_SUNI */
53
54
55 #include "idt77252.h"
56 #include "idt77252_tables.h"
57
58 static unsigned int vpibits = 1;
59
60
61 #define ATM_IDT77252_SEND_IDLE 1
62
63
64 /*
65 * Debug HACKs.
66 */
67 #define DEBUG_MODULE 1
68 #undef HAVE_EEPROM /* does not work, yet. */
69
70 #ifdef CONFIG_ATM_IDT77252_DEBUG
71 static unsigned long debug = DBG_GENERAL;
72 #endif
73
74
75 #define SAR_RX_DELAY (SAR_CFG_RXINT_NODELAY)
76
77
78 /*
79 * SCQ Handling.
80 */
81 static struct scq_info *alloc_scq(struct idt77252_dev *, int);
82 static void free_scq(struct idt77252_dev *, struct scq_info *);
83 static int queue_skb(struct idt77252_dev *, struct vc_map *,
84 struct sk_buff *, int oam);
85 static void drain_scq(struct idt77252_dev *, struct vc_map *);
86 static unsigned long get_free_scd(struct idt77252_dev *, struct vc_map *);
87 static void fill_scd(struct idt77252_dev *, struct scq_info *, int);
88
89 /*
90 * FBQ Handling.
91 */
92 static int push_rx_skb(struct idt77252_dev *,
93 struct sk_buff *, int queue);
94 static void recycle_rx_skb(struct idt77252_dev *, struct sk_buff *);
95 static void flush_rx_pool(struct idt77252_dev *, struct rx_pool *);
96 static void recycle_rx_pool_skb(struct idt77252_dev *,
97 struct rx_pool *);
98 static void add_rx_skb(struct idt77252_dev *, int queue,
99 unsigned int size, unsigned int count);
100
101 /*
102 * RSQ Handling.
103 */
104 static int init_rsq(struct idt77252_dev *);
105 static void deinit_rsq(struct idt77252_dev *);
106 static void idt77252_rx(struct idt77252_dev *);
107
108 /*
109 * TSQ handling.
110 */
111 static int init_tsq(struct idt77252_dev *);
112 static void deinit_tsq(struct idt77252_dev *);
113 static void idt77252_tx(struct idt77252_dev *);
114
115
116 /*
117 * ATM Interface.
118 */
119 static void idt77252_dev_close(struct atm_dev *dev);
120 static int idt77252_open(struct atm_vcc *vcc);
121 static void idt77252_close(struct atm_vcc *vcc);
122 static int idt77252_send(struct atm_vcc *vcc, struct sk_buff *skb);
123 static int idt77252_send_oam(struct atm_vcc *vcc, void *cell,
124 int flags);
125 static void idt77252_phy_put(struct atm_dev *dev, unsigned char value,
126 unsigned long addr);
127 static unsigned char idt77252_phy_get(struct atm_dev *dev, unsigned long addr);
128 static int idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos,
129 int flags);
130 static int idt77252_proc_read(struct atm_dev *dev, loff_t * pos,
131 char *page);
132 static void idt77252_softint(struct work_struct *work);
133
134
135 static struct atmdev_ops idt77252_ops =
136 {
137 .dev_close = idt77252_dev_close,
138 .open = idt77252_open,
139 .close = idt77252_close,
140 .send = idt77252_send,
141 .send_oam = idt77252_send_oam,
142 .phy_put = idt77252_phy_put,
143 .phy_get = idt77252_phy_get,
144 .change_qos = idt77252_change_qos,
145 .proc_read = idt77252_proc_read,
146 .owner = THIS_MODULE
147 };
148
149 static struct idt77252_dev *idt77252_chain = NULL;
150 static unsigned int idt77252_sram_write_errors = 0;
151
152 /*****************************************************************************/
153 /* */
154 /* I/O and Utility Bus */
155 /* */
156 /*****************************************************************************/
157
158 static void
159 waitfor_idle(struct idt77252_dev *card)
160 {
161 u32 stat;
162
163 stat = readl(SAR_REG_STAT);
164 while (stat & SAR_STAT_CMDBZ)
165 stat = readl(SAR_REG_STAT);
166 }
167
168 static u32
169 read_sram(struct idt77252_dev *card, unsigned long addr)
170 {
171 unsigned long flags;
172 u32 value;
173
174 spin_lock_irqsave(&card->cmd_lock, flags);
175 writel(SAR_CMD_READ_SRAM | (addr << 2), SAR_REG_CMD);
176 waitfor_idle(card);
177 value = readl(SAR_REG_DR0);
178 spin_unlock_irqrestore(&card->cmd_lock, flags);
179 return value;
180 }
181
182 static void
183 write_sram(struct idt77252_dev *card, unsigned long addr, u32 value)
184 {
185 unsigned long flags;
186
187 if ((idt77252_sram_write_errors == 0) &&
188 (((addr > card->tst[0] + card->tst_size - 2) &&
189 (addr < card->tst[0] + card->tst_size)) ||
190 ((addr > card->tst[1] + card->tst_size - 2) &&
191 (addr < card->tst[1] + card->tst_size)))) {
192 printk("%s: ERROR: TST JMP section at %08lx written: %08x\n",
193 card->name, addr, value);
194 }
195
196 spin_lock_irqsave(&card->cmd_lock, flags);
197 writel(value, SAR_REG_DR0);
198 writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD);
199 waitfor_idle(card);
200 spin_unlock_irqrestore(&card->cmd_lock, flags);
201 }
202
203 static u8
204 read_utility(void *dev, unsigned long ubus_addr)
205 {
206 struct idt77252_dev *card = dev;
207 unsigned long flags;
208 u8 value;
209
210 if (!card) {
211 printk("Error: No such device.\n");
212 return -1;
213 }
214
215 spin_lock_irqsave(&card->cmd_lock, flags);
216 writel(SAR_CMD_READ_UTILITY + ubus_addr, SAR_REG_CMD);
217 waitfor_idle(card);
218 value = readl(SAR_REG_DR0);
219 spin_unlock_irqrestore(&card->cmd_lock, flags);
220 return value;
221 }
222
223 static void
224 write_utility(void *dev, unsigned long ubus_addr, u8 value)
225 {
226 struct idt77252_dev *card = dev;
227 unsigned long flags;
228
229 if (!card) {
230 printk("Error: No such device.\n");
231 return;
232 }
233
234 spin_lock_irqsave(&card->cmd_lock, flags);
235 writel((u32) value, SAR_REG_DR0);
236 writel(SAR_CMD_WRITE_UTILITY + ubus_addr, SAR_REG_CMD);
237 waitfor_idle(card);
238 spin_unlock_irqrestore(&card->cmd_lock, flags);
239 }
240
241 #ifdef HAVE_EEPROM
242 static u32 rdsrtab[] =
243 {
244 SAR_GP_EECS | SAR_GP_EESCLK,
245 0,
246 SAR_GP_EESCLK, /* 0 */
247 0,
248 SAR_GP_EESCLK, /* 0 */
249 0,
250 SAR_GP_EESCLK, /* 0 */
251 0,
252 SAR_GP_EESCLK, /* 0 */
253 0,
254 SAR_GP_EESCLK, /* 0 */
255 SAR_GP_EEDO,
256 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
257 0,
258 SAR_GP_EESCLK, /* 0 */
259 SAR_GP_EEDO,
260 SAR_GP_EESCLK | SAR_GP_EEDO /* 1 */
261 };
262
263 static u32 wrentab[] =
264 {
265 SAR_GP_EECS | SAR_GP_EESCLK,
266 0,
267 SAR_GP_EESCLK, /* 0 */
268 0,
269 SAR_GP_EESCLK, /* 0 */
270 0,
271 SAR_GP_EESCLK, /* 0 */
272 0,
273 SAR_GP_EESCLK, /* 0 */
274 SAR_GP_EEDO,
275 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
276 SAR_GP_EEDO,
277 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
278 0,
279 SAR_GP_EESCLK, /* 0 */
280 0,
281 SAR_GP_EESCLK /* 0 */
282 };
283
284 static u32 rdtab[] =
285 {
286 SAR_GP_EECS | SAR_GP_EESCLK,
287 0,
288 SAR_GP_EESCLK, /* 0 */
289 0,
290 SAR_GP_EESCLK, /* 0 */
291 0,
292 SAR_GP_EESCLK, /* 0 */
293 0,
294 SAR_GP_EESCLK, /* 0 */
295 0,
296 SAR_GP_EESCLK, /* 0 */
297 0,
298 SAR_GP_EESCLK, /* 0 */
299 SAR_GP_EEDO,
300 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
301 SAR_GP_EEDO,
302 SAR_GP_EESCLK | SAR_GP_EEDO /* 1 */
303 };
304
305 static u32 wrtab[] =
306 {
307 SAR_GP_EECS | SAR_GP_EESCLK,
308 0,
309 SAR_GP_EESCLK, /* 0 */
310 0,
311 SAR_GP_EESCLK, /* 0 */
312 0,
313 SAR_GP_EESCLK, /* 0 */
314 0,
315 SAR_GP_EESCLK, /* 0 */
316 0,
317 SAR_GP_EESCLK, /* 0 */
318 0,
319 SAR_GP_EESCLK, /* 0 */
320 SAR_GP_EEDO,
321 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
322 0,
323 SAR_GP_EESCLK /* 0 */
324 };
325
326 static u32 clktab[] =
327 {
328 0,
329 SAR_GP_EESCLK,
330 0,
331 SAR_GP_EESCLK,
332 0,
333 SAR_GP_EESCLK,
334 0,
335 SAR_GP_EESCLK,
336 0,
337 SAR_GP_EESCLK,
338 0,
339 SAR_GP_EESCLK,
340 0,
341 SAR_GP_EESCLK,
342 0,
343 SAR_GP_EESCLK,
344 0
345 };
346
347 static u32
348 idt77252_read_gp(struct idt77252_dev *card)
349 {
350 u32 gp;
351
352 gp = readl(SAR_REG_GP);
353 #if 0
354 printk("RD: %s\n", gp & SAR_GP_EEDI ? "1" : "0");
355 #endif
356 return gp;
357 }
358
359 static void
360 idt77252_write_gp(struct idt77252_dev *card, u32 value)
361 {
362 unsigned long flags;
363
364 #if 0
365 printk("WR: %s %s %s\n", value & SAR_GP_EECS ? " " : "/CS",
366 value & SAR_GP_EESCLK ? "HIGH" : "LOW ",
367 value & SAR_GP_EEDO ? "1" : "0");
368 #endif
369
370 spin_lock_irqsave(&card->cmd_lock, flags);
371 waitfor_idle(card);
372 writel(value, SAR_REG_GP);
373 spin_unlock_irqrestore(&card->cmd_lock, flags);
374 }
375
376 static u8
377 idt77252_eeprom_read_status(struct idt77252_dev *card)
378 {
379 u8 byte;
380 u32 gp;
381 int i, j;
382
383 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
384
385 for (i = 0; i < ARRAY_SIZE(rdsrtab); i++) {
386 idt77252_write_gp(card, gp | rdsrtab[i]);
387 udelay(5);
388 }
389 idt77252_write_gp(card, gp | SAR_GP_EECS);
390 udelay(5);
391
392 byte = 0;
393 for (i = 0, j = 0; i < 8; i++) {
394 byte <<= 1;
395
396 idt77252_write_gp(card, gp | clktab[j++]);
397 udelay(5);
398
399 byte |= idt77252_read_gp(card) & SAR_GP_EEDI ? 1 : 0;
400
401 idt77252_write_gp(card, gp | clktab[j++]);
402 udelay(5);
403 }
404 idt77252_write_gp(card, gp | SAR_GP_EECS);
405 udelay(5);
406
407 return byte;
408 }
409
410 static u8
411 idt77252_eeprom_read_byte(struct idt77252_dev *card, u8 offset)
412 {
413 u8 byte;
414 u32 gp;
415 int i, j;
416
417 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
418
419 for (i = 0; i < ARRAY_SIZE(rdtab); i++) {
420 idt77252_write_gp(card, gp | rdtab[i]);
421 udelay(5);
422 }
423 idt77252_write_gp(card, gp | SAR_GP_EECS);
424 udelay(5);
425
426 for (i = 0, j = 0; i < 8; i++) {
427 idt77252_write_gp(card, gp | clktab[j++] |
428 (offset & 1 ? SAR_GP_EEDO : 0));
429 udelay(5);
430
431 idt77252_write_gp(card, gp | clktab[j++] |
432 (offset & 1 ? SAR_GP_EEDO : 0));
433 udelay(5);
434
435 offset >>= 1;
436 }
437 idt77252_write_gp(card, gp | SAR_GP_EECS);
438 udelay(5);
439
440 byte = 0;
441 for (i = 0, j = 0; i < 8; i++) {
442 byte <<= 1;
443
444 idt77252_write_gp(card, gp | clktab[j++]);
445 udelay(5);
446
447 byte |= idt77252_read_gp(card) & SAR_GP_EEDI ? 1 : 0;
448
449 idt77252_write_gp(card, gp | clktab[j++]);
450 udelay(5);
451 }
452 idt77252_write_gp(card, gp | SAR_GP_EECS);
453 udelay(5);
454
455 return byte;
456 }
457
458 static void
459 idt77252_eeprom_write_byte(struct idt77252_dev *card, u8 offset, u8 data)
460 {
461 u32 gp;
462 int i, j;
463
464 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
465
466 for (i = 0; i < ARRAY_SIZE(wrentab); i++) {
467 idt77252_write_gp(card, gp | wrentab[i]);
468 udelay(5);
469 }
470 idt77252_write_gp(card, gp | SAR_GP_EECS);
471 udelay(5);
472
473 for (i = 0; i < ARRAY_SIZE(wrtab); i++) {
474 idt77252_write_gp(card, gp | wrtab[i]);
475 udelay(5);
476 }
477 idt77252_write_gp(card, gp | SAR_GP_EECS);
478 udelay(5);
479
480 for (i = 0, j = 0; i < 8; i++) {
481 idt77252_write_gp(card, gp | clktab[j++] |
482 (offset & 1 ? SAR_GP_EEDO : 0));
483 udelay(5);
484
485 idt77252_write_gp(card, gp | clktab[j++] |
486 (offset & 1 ? SAR_GP_EEDO : 0));
487 udelay(5);
488
489 offset >>= 1;
490 }
491 idt77252_write_gp(card, gp | SAR_GP_EECS);
492 udelay(5);
493
494 for (i = 0, j = 0; i < 8; i++) {
495 idt77252_write_gp(card, gp | clktab[j++] |
496 (data & 1 ? SAR_GP_EEDO : 0));
497 udelay(5);
498
499 idt77252_write_gp(card, gp | clktab[j++] |
500 (data & 1 ? SAR_GP_EEDO : 0));
501 udelay(5);
502
503 data >>= 1;
504 }
505 idt77252_write_gp(card, gp | SAR_GP_EECS);
506 udelay(5);
507 }
508
509 static void
510 idt77252_eeprom_init(struct idt77252_dev *card)
511 {
512 u32 gp;
513
514 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
515
516 idt77252_write_gp(card, gp | SAR_GP_EECS | SAR_GP_EESCLK);
517 udelay(5);
518 idt77252_write_gp(card, gp | SAR_GP_EECS);
519 udelay(5);
520 idt77252_write_gp(card, gp | SAR_GP_EECS | SAR_GP_EESCLK);
521 udelay(5);
522 idt77252_write_gp(card, gp | SAR_GP_EECS);
523 udelay(5);
524 }
525 #endif /* HAVE_EEPROM */
526
527
528 #ifdef CONFIG_ATM_IDT77252_DEBUG
529 static void
530 dump_tct(struct idt77252_dev *card, int index)
531 {
532 unsigned long tct;
533 int i;
534
535 tct = (unsigned long) (card->tct_base + index * SAR_SRAM_TCT_SIZE);
536
537 printk("%s: TCT %x:", card->name, index);
538 for (i = 0; i < 8; i++) {
539 printk(" %08x", read_sram(card, tct + i));
540 }
541 printk("\n");
542 }
543
544 static void
545 idt77252_tx_dump(struct idt77252_dev *card)
546 {
547 struct atm_vcc *vcc;
548 struct vc_map *vc;
549 int i;
550
551 printk("%s\n", __func__);
552 for (i = 0; i < card->tct_size; i++) {
553 vc = card->vcs[i];
554 if (!vc)
555 continue;
556
557 vcc = NULL;
558 if (vc->rx_vcc)
559 vcc = vc->rx_vcc;
560 else if (vc->tx_vcc)
561 vcc = vc->tx_vcc;
562
563 if (!vcc)
564 continue;
565
566 printk("%s: Connection %d:\n", card->name, vc->index);
567 dump_tct(card, vc->index);
568 }
569 }
570 #endif
571
572
573 /*****************************************************************************/
574 /* */
575 /* SCQ Handling */
576 /* */
577 /*****************************************************************************/
578
579 static int
580 sb_pool_add(struct idt77252_dev *card, struct sk_buff *skb, int queue)
581 {
582 struct sb_pool *pool = &card->sbpool[queue];
583 int index;
584
585 index = pool->index;
586 while (pool->skb[index]) {
587 index = (index + 1) & FBQ_MASK;
588 if (index == pool->index)
589 return -ENOBUFS;
590 }
591
592 pool->skb[index] = skb;
593 IDT77252_PRV_POOL(skb) = POOL_HANDLE(queue, index);
594
595 pool->index = (index + 1) & FBQ_MASK;
596 return 0;
597 }
598
599 static void
600 sb_pool_remove(struct idt77252_dev *card, struct sk_buff *skb)
601 {
602 unsigned int queue, index;
603 u32 handle;
604
605 handle = IDT77252_PRV_POOL(skb);
606
607 queue = POOL_QUEUE(handle);
608 if (queue > 3)
609 return;
610
611 index = POOL_INDEX(handle);
612 if (index > FBQ_SIZE - 1)
613 return;
614
615 card->sbpool[queue].skb[index] = NULL;
616 }
617
618 static struct sk_buff *
619 sb_pool_skb(struct idt77252_dev *card, u32 handle)
620 {
621 unsigned int queue, index;
622
623 queue = POOL_QUEUE(handle);
624 if (queue > 3)
625 return NULL;
626
627 index = POOL_INDEX(handle);
628 if (index > FBQ_SIZE - 1)
629 return NULL;
630
631 return card->sbpool[queue].skb[index];
632 }
633
634 static struct scq_info *
635 alloc_scq(struct idt77252_dev *card, int class)
636 {
637 struct scq_info *scq;
638
639 scq = kzalloc(sizeof(struct scq_info), GFP_KERNEL);
640 if (!scq)
641 return NULL;
642 scq->base = pci_alloc_consistent(card->pcidev, SCQ_SIZE,
643 &scq->paddr);
644 if (scq->base == NULL) {
645 kfree(scq);
646 return NULL;
647 }
648 memset(scq->base, 0, SCQ_SIZE);
649
650 scq->next = scq->base;
651 scq->last = scq->base + (SCQ_ENTRIES - 1);
652 atomic_set(&scq->used, 0);
653
654 spin_lock_init(&scq->lock);
655 spin_lock_init(&scq->skblock);
656
657 skb_queue_head_init(&scq->transmit);
658 skb_queue_head_init(&scq->pending);
659
660 TXPRINTK("idt77252: SCQ: base 0x%p, next 0x%p, last 0x%p, paddr %08llx\n",
661 scq->base, scq->next, scq->last, (unsigned long long)scq->paddr);
662
663 return scq;
664 }
665
666 static void
667 free_scq(struct idt77252_dev *card, struct scq_info *scq)
668 {
669 struct sk_buff *skb;
670 struct atm_vcc *vcc;
671
672 pci_free_consistent(card->pcidev, SCQ_SIZE,
673 scq->base, scq->paddr);
674
675 while ((skb = skb_dequeue(&scq->transmit))) {
676 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
677 skb->len, PCI_DMA_TODEVICE);
678
679 vcc = ATM_SKB(skb)->vcc;
680 if (vcc->pop)
681 vcc->pop(vcc, skb);
682 else
683 dev_kfree_skb(skb);
684 }
685
686 while ((skb = skb_dequeue(&scq->pending))) {
687 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
688 skb->len, PCI_DMA_TODEVICE);
689
690 vcc = ATM_SKB(skb)->vcc;
691 if (vcc->pop)
692 vcc->pop(vcc, skb);
693 else
694 dev_kfree_skb(skb);
695 }
696
697 kfree(scq);
698 }
699
700
701 static int
702 push_on_scq(struct idt77252_dev *card, struct vc_map *vc, struct sk_buff *skb)
703 {
704 struct scq_info *scq = vc->scq;
705 unsigned long flags;
706 struct scqe *tbd;
707 int entries;
708
709 TXPRINTK("%s: SCQ: next 0x%p\n", card->name, scq->next);
710
711 atomic_inc(&scq->used);
712 entries = atomic_read(&scq->used);
713 if (entries > (SCQ_ENTRIES - 1)) {
714 atomic_dec(&scq->used);
715 goto out;
716 }
717
718 skb_queue_tail(&scq->transmit, skb);
719
720 spin_lock_irqsave(&vc->lock, flags);
721 if (vc->estimator) {
722 struct atm_vcc *vcc = vc->tx_vcc;
723 struct sock *sk = sk_atm(vcc);
724
725 vc->estimator->cells += (skb->len + 47) / 48;
726 if (atomic_read(&sk->sk_wmem_alloc) >
727 (sk->sk_sndbuf >> 1)) {
728 u32 cps = vc->estimator->maxcps;
729
730 vc->estimator->cps = cps;
731 vc->estimator->avcps = cps << 5;
732 if (vc->lacr < vc->init_er) {
733 vc->lacr = vc->init_er;
734 writel(TCMDQ_LACR | (vc->lacr << 16) |
735 vc->index, SAR_REG_TCMDQ);
736 }
737 }
738 }
739 spin_unlock_irqrestore(&vc->lock, flags);
740
741 tbd = &IDT77252_PRV_TBD(skb);
742
743 spin_lock_irqsave(&scq->lock, flags);
744 scq->next->word_1 = cpu_to_le32(tbd->word_1 |
745 SAR_TBD_TSIF | SAR_TBD_GTSI);
746 scq->next->word_2 = cpu_to_le32(tbd->word_2);
747 scq->next->word_3 = cpu_to_le32(tbd->word_3);
748 scq->next->word_4 = cpu_to_le32(tbd->word_4);
749
750 if (scq->next == scq->last)
751 scq->next = scq->base;
752 else
753 scq->next++;
754
755 write_sram(card, scq->scd,
756 scq->paddr +
757 (u32)((unsigned long)scq->next - (unsigned long)scq->base));
758 spin_unlock_irqrestore(&scq->lock, flags);
759
760 scq->trans_start = jiffies;
761
762 if (test_and_clear_bit(VCF_IDLE, &vc->flags)) {
763 writel(TCMDQ_START_LACR | (vc->lacr << 16) | vc->index,
764 SAR_REG_TCMDQ);
765 }
766
767 TXPRINTK("%d entries in SCQ used (push).\n", atomic_read(&scq->used));
768
769 XPRINTK("%s: SCQ (after push %2d) head = 0x%x, next = 0x%p.\n",
770 card->name, atomic_read(&scq->used),
771 read_sram(card, scq->scd + 1), scq->next);
772
773 return 0;
774
775 out:
776 if (time_after(jiffies, scq->trans_start + HZ)) {
777 printk("%s: Error pushing TBD for %d.%d\n",
778 card->name, vc->tx_vcc->vpi, vc->tx_vcc->vci);
779 #ifdef CONFIG_ATM_IDT77252_DEBUG
780 idt77252_tx_dump(card);
781 #endif
782 scq->trans_start = jiffies;
783 }
784
785 return -ENOBUFS;
786 }
787
788
789 static void
790 drain_scq(struct idt77252_dev *card, struct vc_map *vc)
791 {
792 struct scq_info *scq = vc->scq;
793 struct sk_buff *skb;
794 struct atm_vcc *vcc;
795
796 TXPRINTK("%s: SCQ (before drain %2d) next = 0x%p.\n",
797 card->name, atomic_read(&scq->used), scq->next);
798
799 skb = skb_dequeue(&scq->transmit);
800 if (skb) {
801 TXPRINTK("%s: freeing skb at %p.\n", card->name, skb);
802
803 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
804 skb->len, PCI_DMA_TODEVICE);
805
806 vcc = ATM_SKB(skb)->vcc;
807
808 if (vcc->pop)
809 vcc->pop(vcc, skb);
810 else
811 dev_kfree_skb(skb);
812
813 atomic_inc(&vcc->stats->tx);
814 }
815
816 atomic_dec(&scq->used);
817
818 spin_lock(&scq->skblock);
819 while ((skb = skb_dequeue(&scq->pending))) {
820 if (push_on_scq(card, vc, skb)) {
821 skb_queue_head(&vc->scq->pending, skb);
822 break;
823 }
824 }
825 spin_unlock(&scq->skblock);
826 }
827
828 static int
829 queue_skb(struct idt77252_dev *card, struct vc_map *vc,
830 struct sk_buff *skb, int oam)
831 {
832 struct atm_vcc *vcc;
833 struct scqe *tbd;
834 unsigned long flags;
835 int error;
836 int aal;
837
838 if (skb->len == 0) {
839 printk("%s: invalid skb->len (%d)\n", card->name, skb->len);
840 return -EINVAL;
841 }
842
843 TXPRINTK("%s: Sending %d bytes of data.\n",
844 card->name, skb->len);
845
846 tbd = &IDT77252_PRV_TBD(skb);
847 vcc = ATM_SKB(skb)->vcc;
848
849 IDT77252_PRV_PADDR(skb) = pci_map_single(card->pcidev, skb->data,
850 skb->len, PCI_DMA_TODEVICE);
851
852 error = -EINVAL;
853
854 if (oam) {
855 if (skb->len != 52)
856 goto errout;
857
858 tbd->word_1 = SAR_TBD_OAM | ATM_CELL_PAYLOAD | SAR_TBD_EPDU;
859 tbd->word_2 = IDT77252_PRV_PADDR(skb) + 4;
860 tbd->word_3 = 0x00000000;
861 tbd->word_4 = (skb->data[0] << 24) | (skb->data[1] << 16) |
862 (skb->data[2] << 8) | (skb->data[3] << 0);
863
864 if (test_bit(VCF_RSV, &vc->flags))
865 vc = card->vcs[0];
866
867 goto done;
868 }
869
870 if (test_bit(VCF_RSV, &vc->flags)) {
871 printk("%s: Trying to transmit on reserved VC\n", card->name);
872 goto errout;
873 }
874
875 aal = vcc->qos.aal;
876
877 switch (aal) {
878 case ATM_AAL0:
879 case ATM_AAL34:
880 if (skb->len > 52)
881 goto errout;
882
883 if (aal == ATM_AAL0)
884 tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL0 |
885 ATM_CELL_PAYLOAD;
886 else
887 tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL34 |
888 ATM_CELL_PAYLOAD;
889
890 tbd->word_2 = IDT77252_PRV_PADDR(skb) + 4;
891 tbd->word_3 = 0x00000000;
892 tbd->word_4 = (skb->data[0] << 24) | (skb->data[1] << 16) |
893 (skb->data[2] << 8) | (skb->data[3] << 0);
894 break;
895
896 case ATM_AAL5:
897 tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL5 | skb->len;
898 tbd->word_2 = IDT77252_PRV_PADDR(skb);
899 tbd->word_3 = skb->len;
900 tbd->word_4 = (vcc->vpi << SAR_TBD_VPI_SHIFT) |
901 (vcc->vci << SAR_TBD_VCI_SHIFT);
902 break;
903
904 case ATM_AAL1:
905 case ATM_AAL2:
906 default:
907 printk("%s: Traffic type not supported.\n", card->name);
908 error = -EPROTONOSUPPORT;
909 goto errout;
910 }
911
912 done:
913 spin_lock_irqsave(&vc->scq->skblock, flags);
914 skb_queue_tail(&vc->scq->pending, skb);
915
916 while ((skb = skb_dequeue(&vc->scq->pending))) {
917 if (push_on_scq(card, vc, skb)) {
918 skb_queue_head(&vc->scq->pending, skb);
919 break;
920 }
921 }
922 spin_unlock_irqrestore(&vc->scq->skblock, flags);
923
924 return 0;
925
926 errout:
927 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
928 skb->len, PCI_DMA_TODEVICE);
929 return error;
930 }
931
932 static unsigned long
933 get_free_scd(struct idt77252_dev *card, struct vc_map *vc)
934 {
935 int i;
936
937 for (i = 0; i < card->scd_size; i++) {
938 if (!card->scd2vc[i]) {
939 card->scd2vc[i] = vc;
940 vc->scd_index = i;
941 return card->scd_base + i * SAR_SRAM_SCD_SIZE;
942 }
943 }
944 return 0;
945 }
946
947 static void
948 fill_scd(struct idt77252_dev *card, struct scq_info *scq, int class)
949 {
950 write_sram(card, scq->scd, scq->paddr);
951 write_sram(card, scq->scd + 1, 0x00000000);
952 write_sram(card, scq->scd + 2, 0xffffffff);
953 write_sram(card, scq->scd + 3, 0x00000000);
954 }
955
956 static void
957 clear_scd(struct idt77252_dev *card, struct scq_info *scq, int class)
958 {
959 return;
960 }
961
962 /*****************************************************************************/
963 /* */
964 /* RSQ Handling */
965 /* */
966 /*****************************************************************************/
967
968 static int
969 init_rsq(struct idt77252_dev *card)
970 {
971 struct rsq_entry *rsqe;
972
973 card->rsq.base = pci_alloc_consistent(card->pcidev, RSQSIZE,
974 &card->rsq.paddr);
975 if (card->rsq.base == NULL) {
976 printk("%s: can't allocate RSQ.\n", card->name);
977 return -1;
978 }
979 memset(card->rsq.base, 0, RSQSIZE);
980
981 card->rsq.last = card->rsq.base + RSQ_NUM_ENTRIES - 1;
982 card->rsq.next = card->rsq.last;
983 for (rsqe = card->rsq.base; rsqe <= card->rsq.last; rsqe++)
984 rsqe->word_4 = 0;
985
986 writel((unsigned long) card->rsq.last - (unsigned long) card->rsq.base,
987 SAR_REG_RSQH);
988 writel(card->rsq.paddr, SAR_REG_RSQB);
989
990 IPRINTK("%s: RSQ base at 0x%lx (0x%x).\n", card->name,
991 (unsigned long) card->rsq.base,
992 readl(SAR_REG_RSQB));
993 IPRINTK("%s: RSQ head = 0x%x, base = 0x%x, tail = 0x%x.\n",
994 card->name,
995 readl(SAR_REG_RSQH),
996 readl(SAR_REG_RSQB),
997 readl(SAR_REG_RSQT));
998
999 return 0;
1000 }
1001
1002 static void
1003 deinit_rsq(struct idt77252_dev *card)
1004 {
1005 pci_free_consistent(card->pcidev, RSQSIZE,
1006 card->rsq.base, card->rsq.paddr);
1007 }
1008
1009 static void
1010 dequeue_rx(struct idt77252_dev *card, struct rsq_entry *rsqe)
1011 {
1012 struct atm_vcc *vcc;
1013 struct sk_buff *skb;
1014 struct rx_pool *rpp;
1015 struct vc_map *vc;
1016 u32 header, vpi, vci;
1017 u32 stat;
1018 int i;
1019
1020 stat = le32_to_cpu(rsqe->word_4);
1021
1022 if (stat & SAR_RSQE_IDLE) {
1023 RXPRINTK("%s: message about inactive connection.\n",
1024 card->name);
1025 return;
1026 }
1027
1028 skb = sb_pool_skb(card, le32_to_cpu(rsqe->word_2));
1029 if (skb == NULL) {
1030 printk("%s: NULL skb in %s, rsqe: %08x %08x %08x %08x\n",
1031 card->name, __func__,
1032 le32_to_cpu(rsqe->word_1), le32_to_cpu(rsqe->word_2),
1033 le32_to_cpu(rsqe->word_3), le32_to_cpu(rsqe->word_4));
1034 return;
1035 }
1036
1037 header = le32_to_cpu(rsqe->word_1);
1038 vpi = (header >> 16) & 0x00ff;
1039 vci = (header >> 0) & 0xffff;
1040
1041 RXPRINTK("%s: SDU for %d.%d received in buffer 0x%p (data 0x%p).\n",
1042 card->name, vpi, vci, skb, skb->data);
1043
1044 if ((vpi >= (1 << card->vpibits)) || (vci != (vci & card->vcimask))) {
1045 printk("%s: SDU received for out-of-range vc %u.%u\n",
1046 card->name, vpi, vci);
1047 recycle_rx_skb(card, skb);
1048 return;
1049 }
1050
1051 vc = card->vcs[VPCI2VC(card, vpi, vci)];
1052 if (!vc || !test_bit(VCF_RX, &vc->flags)) {
1053 printk("%s: SDU received on non RX vc %u.%u\n",
1054 card->name, vpi, vci);
1055 recycle_rx_skb(card, skb);
1056 return;
1057 }
1058
1059 vcc = vc->rx_vcc;
1060
1061 pci_dma_sync_single_for_cpu(card->pcidev, IDT77252_PRV_PADDR(skb),
1062 skb_end_pointer(skb) - skb->data,
1063 PCI_DMA_FROMDEVICE);
1064
1065 if ((vcc->qos.aal == ATM_AAL0) ||
1066 (vcc->qos.aal == ATM_AAL34)) {
1067 struct sk_buff *sb;
1068 unsigned char *cell;
1069 u32 aal0;
1070
1071 cell = skb->data;
1072 for (i = (stat & SAR_RSQE_CELLCNT); i; i--) {
1073 if ((sb = dev_alloc_skb(64)) == NULL) {
1074 printk("%s: Can't allocate buffers for aal0.\n",
1075 card->name);
1076 atomic_add(i, &vcc->stats->rx_drop);
1077 break;
1078 }
1079 if (!atm_charge(vcc, sb->truesize)) {
1080 RXPRINTK("%s: atm_charge() dropped aal0 packets.\n",
1081 card->name);
1082 atomic_add(i - 1, &vcc->stats->rx_drop);
1083 dev_kfree_skb(sb);
1084 break;
1085 }
1086 aal0 = (vpi << ATM_HDR_VPI_SHIFT) |
1087 (vci << ATM_HDR_VCI_SHIFT);
1088 aal0 |= (stat & SAR_RSQE_EPDU) ? 0x00000002 : 0;
1089 aal0 |= (stat & SAR_RSQE_CLP) ? 0x00000001 : 0;
1090
1091 *((u32 *) sb->data) = aal0;
1092 skb_put(sb, sizeof(u32));
1093 memcpy(skb_put(sb, ATM_CELL_PAYLOAD),
1094 cell, ATM_CELL_PAYLOAD);
1095
1096 ATM_SKB(sb)->vcc = vcc;
1097 __net_timestamp(sb);
1098 vcc->push(vcc, sb);
1099 atomic_inc(&vcc->stats->rx);
1100
1101 cell += ATM_CELL_PAYLOAD;
1102 }
1103
1104 recycle_rx_skb(card, skb);
1105 return;
1106 }
1107 if (vcc->qos.aal != ATM_AAL5) {
1108 printk("%s: Unexpected AAL type in dequeue_rx(): %d.\n",
1109 card->name, vcc->qos.aal);
1110 recycle_rx_skb(card, skb);
1111 return;
1112 }
1113 skb->len = (stat & SAR_RSQE_CELLCNT) * ATM_CELL_PAYLOAD;
1114
1115 rpp = &vc->rcv.rx_pool;
1116
1117 rpp->len += skb->len;
1118 if (!rpp->count++)
1119 rpp->first = skb;
1120 *rpp->last = skb;
1121 rpp->last = &skb->next;
1122
1123 if (stat & SAR_RSQE_EPDU) {
1124 unsigned char *l1l2;
1125 unsigned int len;
1126
1127 l1l2 = (unsigned char *) ((unsigned long) skb->data + skb->len - 6);
1128
1129 len = (l1l2[0] << 8) | l1l2[1];
1130 len = len ? len : 0x10000;
1131
1132 RXPRINTK("%s: PDU has %d bytes.\n", card->name, len);
1133
1134 if ((len + 8 > rpp->len) || (len + (47 + 8) < rpp->len)) {
1135 RXPRINTK("%s: AAL5 PDU size mismatch: %d != %d. "
1136 "(CDC: %08x)\n",
1137 card->name, len, rpp->len, readl(SAR_REG_CDC));
1138 recycle_rx_pool_skb(card, rpp);
1139 atomic_inc(&vcc->stats->rx_err);
1140 return;
1141 }
1142 if (stat & SAR_RSQE_CRC) {
1143 RXPRINTK("%s: AAL5 CRC error.\n", card->name);
1144 recycle_rx_pool_skb(card, rpp);
1145 atomic_inc(&vcc->stats->rx_err);
1146 return;
1147 }
1148 if (rpp->count > 1) {
1149 struct sk_buff *sb;
1150
1151 skb = dev_alloc_skb(rpp->len);
1152 if (!skb) {
1153 RXPRINTK("%s: Can't alloc RX skb.\n",
1154 card->name);
1155 recycle_rx_pool_skb(card, rpp);
1156 atomic_inc(&vcc->stats->rx_err);
1157 return;
1158 }
1159 if (!atm_charge(vcc, skb->truesize)) {
1160 recycle_rx_pool_skb(card, rpp);
1161 dev_kfree_skb(skb);
1162 return;
1163 }
1164 sb = rpp->first;
1165 for (i = 0; i < rpp->count; i++) {
1166 memcpy(skb_put(skb, sb->len),
1167 sb->data, sb->len);
1168 sb = sb->next;
1169 }
1170
1171 recycle_rx_pool_skb(card, rpp);
1172
1173 skb_trim(skb, len);
1174 ATM_SKB(skb)->vcc = vcc;
1175 __net_timestamp(skb);
1176
1177 vcc->push(vcc, skb);
1178 atomic_inc(&vcc->stats->rx);
1179
1180 return;
1181 }
1182
1183 skb->next = NULL;
1184 flush_rx_pool(card, rpp);
1185
1186 if (!atm_charge(vcc, skb->truesize)) {
1187 recycle_rx_skb(card, skb);
1188 return;
1189 }
1190
1191 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
1192 skb_end_pointer(skb) - skb->data,
1193 PCI_DMA_FROMDEVICE);
1194 sb_pool_remove(card, skb);
1195
1196 skb_trim(skb, len);
1197 ATM_SKB(skb)->vcc = vcc;
1198 __net_timestamp(skb);
1199
1200 vcc->push(vcc, skb);
1201 atomic_inc(&vcc->stats->rx);
1202
1203 if (skb->truesize > SAR_FB_SIZE_3)
1204 add_rx_skb(card, 3, SAR_FB_SIZE_3, 1);
1205 else if (skb->truesize > SAR_FB_SIZE_2)
1206 add_rx_skb(card, 2, SAR_FB_SIZE_2, 1);
1207 else if (skb->truesize > SAR_FB_SIZE_1)
1208 add_rx_skb(card, 1, SAR_FB_SIZE_1, 1);
1209 else
1210 add_rx_skb(card, 0, SAR_FB_SIZE_0, 1);
1211 return;
1212 }
1213 }
1214
1215 static void
1216 idt77252_rx(struct idt77252_dev *card)
1217 {
1218 struct rsq_entry *rsqe;
1219
1220 if (card->rsq.next == card->rsq.last)
1221 rsqe = card->rsq.base;
1222 else
1223 rsqe = card->rsq.next + 1;
1224
1225 if (!(le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID)) {
1226 RXPRINTK("%s: no entry in RSQ.\n", card->name);
1227 return;
1228 }
1229
1230 do {
1231 dequeue_rx(card, rsqe);
1232 rsqe->word_4 = 0;
1233 card->rsq.next = rsqe;
1234 if (card->rsq.next == card->rsq.last)
1235 rsqe = card->rsq.base;
1236 else
1237 rsqe = card->rsq.next + 1;
1238 } while (le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID);
1239
1240 writel((unsigned long) card->rsq.next - (unsigned long) card->rsq.base,
1241 SAR_REG_RSQH);
1242 }
1243
1244 static void
1245 idt77252_rx_raw(struct idt77252_dev *card)
1246 {
1247 struct sk_buff *queue;
1248 u32 head, tail;
1249 struct atm_vcc *vcc;
1250 struct vc_map *vc;
1251 struct sk_buff *sb;
1252
1253 if (card->raw_cell_head == NULL) {
1254 u32 handle = le32_to_cpu(*(card->raw_cell_hnd + 1));
1255 card->raw_cell_head = sb_pool_skb(card, handle);
1256 }
1257
1258 queue = card->raw_cell_head;
1259 if (!queue)
1260 return;
1261
1262 head = IDT77252_PRV_PADDR(queue) + (queue->data - queue->head - 16);
1263 tail = readl(SAR_REG_RAWCT);
1264
1265 pci_dma_sync_single_for_cpu(card->pcidev, IDT77252_PRV_PADDR(queue),
1266 skb_end_pointer(queue) - queue->head - 16,
1267 PCI_DMA_FROMDEVICE);
1268
1269 while (head != tail) {
1270 unsigned int vpi, vci, pti;
1271 u32 header;
1272
1273 header = le32_to_cpu(*(u32 *) &queue->data[0]);
1274
1275 vpi = (header & ATM_HDR_VPI_MASK) >> ATM_HDR_VPI_SHIFT;
1276 vci = (header & ATM_HDR_VCI_MASK) >> ATM_HDR_VCI_SHIFT;
1277 pti = (header & ATM_HDR_PTI_MASK) >> ATM_HDR_PTI_SHIFT;
1278
1279 #ifdef CONFIG_ATM_IDT77252_DEBUG
1280 if (debug & DBG_RAW_CELL) {
1281 int i;
1282
1283 printk("%s: raw cell %x.%02x.%04x.%x.%x\n",
1284 card->name, (header >> 28) & 0x000f,
1285 (header >> 20) & 0x00ff,
1286 (header >> 4) & 0xffff,
1287 (header >> 1) & 0x0007,
1288 (header >> 0) & 0x0001);
1289 for (i = 16; i < 64; i++)
1290 printk(" %02x", queue->data[i]);
1291 printk("\n");
1292 }
1293 #endif
1294
1295 if (vpi >= (1<<card->vpibits) || vci >= (1<<card->vcibits)) {
1296 RPRINTK("%s: SDU received for out-of-range vc %u.%u\n",
1297 card->name, vpi, vci);
1298 goto drop;
1299 }
1300
1301 vc = card->vcs[VPCI2VC(card, vpi, vci)];
1302 if (!vc || !test_bit(VCF_RX, &vc->flags)) {
1303 RPRINTK("%s: SDU received on non RX vc %u.%u\n",
1304 card->name, vpi, vci);
1305 goto drop;
1306 }
1307
1308 vcc = vc->rx_vcc;
1309
1310 if (vcc->qos.aal != ATM_AAL0) {
1311 RPRINTK("%s: raw cell for non AAL0 vc %u.%u\n",
1312 card->name, vpi, vci);
1313 atomic_inc(&vcc->stats->rx_drop);
1314 goto drop;
1315 }
1316
1317 if ((sb = dev_alloc_skb(64)) == NULL) {
1318 printk("%s: Can't allocate buffers for AAL0.\n",
1319 card->name);
1320 atomic_inc(&vcc->stats->rx_err);
1321 goto drop;
1322 }
1323
1324 if (!atm_charge(vcc, sb->truesize)) {
1325 RXPRINTK("%s: atm_charge() dropped AAL0 packets.\n",
1326 card->name);
1327 dev_kfree_skb(sb);
1328 goto drop;
1329 }
1330
1331 *((u32 *) sb->data) = header;
1332 skb_put(sb, sizeof(u32));
1333 memcpy(skb_put(sb, ATM_CELL_PAYLOAD), &(queue->data[16]),
1334 ATM_CELL_PAYLOAD);
1335
1336 ATM_SKB(sb)->vcc = vcc;
1337 __net_timestamp(sb);
1338 vcc->push(vcc, sb);
1339 atomic_inc(&vcc->stats->rx);
1340
1341 drop:
1342 skb_pull(queue, 64);
1343
1344 head = IDT77252_PRV_PADDR(queue)
1345 + (queue->data - queue->head - 16);
1346
1347 if (queue->len < 128) {
1348 struct sk_buff *next;
1349 u32 handle;
1350
1351 head = le32_to_cpu(*(u32 *) &queue->data[0]);
1352 handle = le32_to_cpu(*(u32 *) &queue->data[4]);
1353
1354 next = sb_pool_skb(card, handle);
1355 recycle_rx_skb(card, queue);
1356
1357 if (next) {
1358 card->raw_cell_head = next;
1359 queue = card->raw_cell_head;
1360 pci_dma_sync_single_for_cpu(card->pcidev,
1361 IDT77252_PRV_PADDR(queue),
1362 (skb_end_pointer(queue) -
1363 queue->data),
1364 PCI_DMA_FROMDEVICE);
1365 } else {
1366 card->raw_cell_head = NULL;
1367 printk("%s: raw cell queue overrun\n",
1368 card->name);
1369 break;
1370 }
1371 }
1372 }
1373 }
1374
1375
1376 /*****************************************************************************/
1377 /* */
1378 /* TSQ Handling */
1379 /* */
1380 /*****************************************************************************/
1381
1382 static int
1383 init_tsq(struct idt77252_dev *card)
1384 {
1385 struct tsq_entry *tsqe;
1386
1387 card->tsq.base = pci_alloc_consistent(card->pcidev, RSQSIZE,
1388 &card->tsq.paddr);
1389 if (card->tsq.base == NULL) {
1390 printk("%s: can't allocate TSQ.\n", card->name);
1391 return -1;
1392 }
1393 memset(card->tsq.base, 0, TSQSIZE);
1394
1395 card->tsq.last = card->tsq.base + TSQ_NUM_ENTRIES - 1;
1396 card->tsq.next = card->tsq.last;
1397 for (tsqe = card->tsq.base; tsqe <= card->tsq.last; tsqe++)
1398 tsqe->word_2 = cpu_to_le32(SAR_TSQE_INVALID);
1399
1400 writel(card->tsq.paddr, SAR_REG_TSQB);
1401 writel((unsigned long) card->tsq.next - (unsigned long) card->tsq.base,
1402 SAR_REG_TSQH);
1403
1404 return 0;
1405 }
1406
1407 static void
1408 deinit_tsq(struct idt77252_dev *card)
1409 {
1410 pci_free_consistent(card->pcidev, TSQSIZE,
1411 card->tsq.base, card->tsq.paddr);
1412 }
1413
1414 static void
1415 idt77252_tx(struct idt77252_dev *card)
1416 {
1417 struct tsq_entry *tsqe;
1418 unsigned int vpi, vci;
1419 struct vc_map *vc;
1420 u32 conn, stat;
1421
1422 if (card->tsq.next == card->tsq.last)
1423 tsqe = card->tsq.base;
1424 else
1425 tsqe = card->tsq.next + 1;
1426
1427 TXPRINTK("idt77252_tx: tsq %p: base %p, next %p, last %p\n", tsqe,
1428 card->tsq.base, card->tsq.next, card->tsq.last);
1429 TXPRINTK("idt77252_tx: tsqb %08x, tsqt %08x, tsqh %08x, \n",
1430 readl(SAR_REG_TSQB),
1431 readl(SAR_REG_TSQT),
1432 readl(SAR_REG_TSQH));
1433
1434 stat = le32_to_cpu(tsqe->word_2);
1435
1436 if (stat & SAR_TSQE_INVALID)
1437 return;
1438
1439 do {
1440 TXPRINTK("tsqe: 0x%p [0x%08x 0x%08x]\n", tsqe,
1441 le32_to_cpu(tsqe->word_1),
1442 le32_to_cpu(tsqe->word_2));
1443
1444 switch (stat & SAR_TSQE_TYPE) {
1445 case SAR_TSQE_TYPE_TIMER:
1446 TXPRINTK("%s: Timer RollOver detected.\n", card->name);
1447 break;
1448
1449 case SAR_TSQE_TYPE_IDLE:
1450
1451 conn = le32_to_cpu(tsqe->word_1);
1452
1453 if (SAR_TSQE_TAG(stat) == 0x10) {
1454 #ifdef NOTDEF
1455 printk("%s: Connection %d halted.\n",
1456 card->name,
1457 le32_to_cpu(tsqe->word_1) & 0x1fff);
1458 #endif
1459 break;
1460 }
1461
1462 vc = card->vcs[conn & 0x1fff];
1463 if (!vc) {
1464 printk("%s: could not find VC from conn %d\n",
1465 card->name, conn & 0x1fff);
1466 break;
1467 }
1468
1469 printk("%s: Connection %d IDLE.\n",
1470 card->name, vc->index);
1471
1472 set_bit(VCF_IDLE, &vc->flags);
1473 break;
1474
1475 case SAR_TSQE_TYPE_TSR:
1476
1477 conn = le32_to_cpu(tsqe->word_1);
1478
1479 vc = card->vcs[conn & 0x1fff];
1480 if (!vc) {
1481 printk("%s: no VC at index %d\n",
1482 card->name,
1483 le32_to_cpu(tsqe->word_1) & 0x1fff);
1484 break;
1485 }
1486
1487 drain_scq(card, vc);
1488 break;
1489
1490 case SAR_TSQE_TYPE_TBD_COMP:
1491
1492 conn = le32_to_cpu(tsqe->word_1);
1493
1494 vpi = (conn >> SAR_TBD_VPI_SHIFT) & 0x00ff;
1495 vci = (conn >> SAR_TBD_VCI_SHIFT) & 0xffff;
1496
1497 if (vpi >= (1 << card->vpibits) ||
1498 vci >= (1 << card->vcibits)) {
1499 printk("%s: TBD complete: "
1500 "out of range VPI.VCI %u.%u\n",
1501 card->name, vpi, vci);
1502 break;
1503 }
1504
1505 vc = card->vcs[VPCI2VC(card, vpi, vci)];
1506 if (!vc) {
1507 printk("%s: TBD complete: "
1508 "no VC at VPI.VCI %u.%u\n",
1509 card->name, vpi, vci);
1510 break;
1511 }
1512
1513 drain_scq(card, vc);
1514 break;
1515 }
1516
1517 tsqe->word_2 = cpu_to_le32(SAR_TSQE_INVALID);
1518
1519 card->tsq.next = tsqe;
1520 if (card->tsq.next == card->tsq.last)
1521 tsqe = card->tsq.base;
1522 else
1523 tsqe = card->tsq.next + 1;
1524
1525 TXPRINTK("tsqe: %p: base %p, next %p, last %p\n", tsqe,
1526 card->tsq.base, card->tsq.next, card->tsq.last);
1527
1528 stat = le32_to_cpu(tsqe->word_2);
1529
1530 } while (!(stat & SAR_TSQE_INVALID));
1531
1532 writel((unsigned long)card->tsq.next - (unsigned long)card->tsq.base,
1533 SAR_REG_TSQH);
1534
1535 XPRINTK("idt77252_tx-after writel%d: TSQ head = 0x%x, tail = 0x%x, next = 0x%p.\n",
1536 card->index, readl(SAR_REG_TSQH),
1537 readl(SAR_REG_TSQT), card->tsq.next);
1538 }
1539
1540
1541 static void
1542 tst_timer(unsigned long data)
1543 {
1544 struct idt77252_dev *card = (struct idt77252_dev *)data;
1545 unsigned long base, idle, jump;
1546 unsigned long flags;
1547 u32 pc;
1548 int e;
1549
1550 spin_lock_irqsave(&card->tst_lock, flags);
1551
1552 base = card->tst[card->tst_index];
1553 idle = card->tst[card->tst_index ^ 1];
1554
1555 if (test_bit(TST_SWITCH_WAIT, &card->tst_state)) {
1556 jump = base + card->tst_size - 2;
1557
1558 pc = readl(SAR_REG_NOW) >> 2;
1559 if ((pc ^ idle) & ~(card->tst_size - 1)) {
1560 mod_timer(&card->tst_timer, jiffies + 1);
1561 goto out;
1562 }
1563
1564 clear_bit(TST_SWITCH_WAIT, &card->tst_state);
1565
1566 card->tst_index ^= 1;
1567 write_sram(card, jump, TSTE_OPC_JMP | (base << 2));
1568
1569 base = card->tst[card->tst_index];
1570 idle = card->tst[card->tst_index ^ 1];
1571
1572 for (e = 0; e < card->tst_size - 2; e++) {
1573 if (card->soft_tst[e].tste & TSTE_PUSH_IDLE) {
1574 write_sram(card, idle + e,
1575 card->soft_tst[e].tste & TSTE_MASK);
1576 card->soft_tst[e].tste &= ~(TSTE_PUSH_IDLE);
1577 }
1578 }
1579 }
1580
1581 if (test_and_clear_bit(TST_SWITCH_PENDING, &card->tst_state)) {
1582
1583 for (e = 0; e < card->tst_size - 2; e++) {
1584 if (card->soft_tst[e].tste & TSTE_PUSH_ACTIVE) {
1585 write_sram(card, idle + e,
1586 card->soft_tst[e].tste & TSTE_MASK);
1587 card->soft_tst[e].tste &= ~(TSTE_PUSH_ACTIVE);
1588 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1589 }
1590 }
1591
1592 jump = base + card->tst_size - 2;
1593
1594 write_sram(card, jump, TSTE_OPC_NULL);
1595 set_bit(TST_SWITCH_WAIT, &card->tst_state);
1596
1597 mod_timer(&card->tst_timer, jiffies + 1);
1598 }
1599
1600 out:
1601 spin_unlock_irqrestore(&card->tst_lock, flags);
1602 }
1603
1604 static int
1605 __fill_tst(struct idt77252_dev *card, struct vc_map *vc,
1606 int n, unsigned int opc)
1607 {
1608 unsigned long cl, avail;
1609 unsigned long idle;
1610 int e, r;
1611 u32 data;
1612
1613 avail = card->tst_size - 2;
1614 for (e = 0; e < avail; e++) {
1615 if (card->soft_tst[e].vc == NULL)
1616 break;
1617 }
1618 if (e >= avail) {
1619 printk("%s: No free TST entries found\n", card->name);
1620 return -1;
1621 }
1622
1623 NPRINTK("%s: conn %d: first TST entry at %d.\n",
1624 card->name, vc ? vc->index : -1, e);
1625
1626 r = n;
1627 cl = avail;
1628 data = opc & TSTE_OPC_MASK;
1629 if (vc && (opc != TSTE_OPC_NULL))
1630 data = opc | vc->index;
1631
1632 idle = card->tst[card->tst_index ^ 1];
1633
1634 /*
1635 * Fill Soft TST.
1636 */
1637 while (r > 0) {
1638 if ((cl >= avail) && (card->soft_tst[e].vc == NULL)) {
1639 if (vc)
1640 card->soft_tst[e].vc = vc;
1641 else
1642 card->soft_tst[e].vc = (void *)-1;
1643
1644 card->soft_tst[e].tste = data;
1645 if (timer_pending(&card->tst_timer))
1646 card->soft_tst[e].tste |= TSTE_PUSH_ACTIVE;
1647 else {
1648 write_sram(card, idle + e, data);
1649 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1650 }
1651
1652 cl -= card->tst_size;
1653 r--;
1654 }
1655
1656 if (++e == avail)
1657 e = 0;
1658 cl += n;
1659 }
1660
1661 return 0;
1662 }
1663
1664 static int
1665 fill_tst(struct idt77252_dev *card, struct vc_map *vc, int n, unsigned int opc)
1666 {
1667 unsigned long flags;
1668 int res;
1669
1670 spin_lock_irqsave(&card->tst_lock, flags);
1671
1672 res = __fill_tst(card, vc, n, opc);
1673
1674 set_bit(TST_SWITCH_PENDING, &card->tst_state);
1675 if (!timer_pending(&card->tst_timer))
1676 mod_timer(&card->tst_timer, jiffies + 1);
1677
1678 spin_unlock_irqrestore(&card->tst_lock, flags);
1679 return res;
1680 }
1681
1682 static int
1683 __clear_tst(struct idt77252_dev *card, struct vc_map *vc)
1684 {
1685 unsigned long idle;
1686 int e;
1687
1688 idle = card->tst[card->tst_index ^ 1];
1689
1690 for (e = 0; e < card->tst_size - 2; e++) {
1691 if (card->soft_tst[e].vc == vc) {
1692 card->soft_tst[e].vc = NULL;
1693
1694 card->soft_tst[e].tste = TSTE_OPC_VAR;
1695 if (timer_pending(&card->tst_timer))
1696 card->soft_tst[e].tste |= TSTE_PUSH_ACTIVE;
1697 else {
1698 write_sram(card, idle + e, TSTE_OPC_VAR);
1699 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1700 }
1701 }
1702 }
1703
1704 return 0;
1705 }
1706
1707 static int
1708 clear_tst(struct idt77252_dev *card, struct vc_map *vc)
1709 {
1710 unsigned long flags;
1711 int res;
1712
1713 spin_lock_irqsave(&card->tst_lock, flags);
1714
1715 res = __clear_tst(card, vc);
1716
1717 set_bit(TST_SWITCH_PENDING, &card->tst_state);
1718 if (!timer_pending(&card->tst_timer))
1719 mod_timer(&card->tst_timer, jiffies + 1);
1720
1721 spin_unlock_irqrestore(&card->tst_lock, flags);
1722 return res;
1723 }
1724
1725 static int
1726 change_tst(struct idt77252_dev *card, struct vc_map *vc,
1727 int n, unsigned int opc)
1728 {
1729 unsigned long flags;
1730 int res;
1731
1732 spin_lock_irqsave(&card->tst_lock, flags);
1733
1734 __clear_tst(card, vc);
1735 res = __fill_tst(card, vc, n, opc);
1736
1737 set_bit(TST_SWITCH_PENDING, &card->tst_state);
1738 if (!timer_pending(&card->tst_timer))
1739 mod_timer(&card->tst_timer, jiffies + 1);
1740
1741 spin_unlock_irqrestore(&card->tst_lock, flags);
1742 return res;
1743 }
1744
1745
1746 static int
1747 set_tct(struct idt77252_dev *card, struct vc_map *vc)
1748 {
1749 unsigned long tct;
1750
1751 tct = (unsigned long) (card->tct_base + vc->index * SAR_SRAM_TCT_SIZE);
1752
1753 switch (vc->class) {
1754 case SCHED_CBR:
1755 OPRINTK("%s: writing TCT at 0x%lx, SCD 0x%lx.\n",
1756 card->name, tct, vc->scq->scd);
1757
1758 write_sram(card, tct + 0, TCT_CBR | vc->scq->scd);
1759 write_sram(card, tct + 1, 0);
1760 write_sram(card, tct + 2, 0);
1761 write_sram(card, tct + 3, 0);
1762 write_sram(card, tct + 4, 0);
1763 write_sram(card, tct + 5, 0);
1764 write_sram(card, tct + 6, 0);
1765 write_sram(card, tct + 7, 0);
1766 break;
1767
1768 case SCHED_UBR:
1769 OPRINTK("%s: writing TCT at 0x%lx, SCD 0x%lx.\n",
1770 card->name, tct, vc->scq->scd);
1771
1772 write_sram(card, tct + 0, TCT_UBR | vc->scq->scd);
1773 write_sram(card, tct + 1, 0);
1774 write_sram(card, tct + 2, TCT_TSIF);
1775 write_sram(card, tct + 3, TCT_HALT | TCT_IDLE);
1776 write_sram(card, tct + 4, 0);
1777 write_sram(card, tct + 5, vc->init_er);
1778 write_sram(card, tct + 6, 0);
1779 write_sram(card, tct + 7, TCT_FLAG_UBR);
1780 break;
1781
1782 case SCHED_VBR:
1783 case SCHED_ABR:
1784 default:
1785 return -ENOSYS;
1786 }
1787
1788 return 0;
1789 }
1790
1791 /*****************************************************************************/
1792 /* */
1793 /* FBQ Handling */
1794 /* */
1795 /*****************************************************************************/
1796
1797 static __inline__ int
1798 idt77252_fbq_level(struct idt77252_dev *card, int queue)
1799 {
1800 return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) & 0x0f;
1801 }
1802
1803 static __inline__ int
1804 idt77252_fbq_full(struct idt77252_dev *card, int queue)
1805 {
1806 return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) == 0x0f;
1807 }
1808
1809 static int
1810 push_rx_skb(struct idt77252_dev *card, struct sk_buff *skb, int queue)
1811 {
1812 unsigned long flags;
1813 u32 handle;
1814 u32 addr;
1815
1816 skb->data = skb->head;
1817 skb_reset_tail_pointer(skb);
1818 skb->len = 0;
1819
1820 skb_reserve(skb, 16);
1821
1822 switch (queue) {
1823 case 0:
1824 skb_put(skb, SAR_FB_SIZE_0);
1825 break;
1826 case 1:
1827 skb_put(skb, SAR_FB_SIZE_1);
1828 break;
1829 case 2:
1830 skb_put(skb, SAR_FB_SIZE_2);
1831 break;
1832 case 3:
1833 skb_put(skb, SAR_FB_SIZE_3);
1834 break;
1835 default:
1836 return -1;
1837 }
1838
1839 if (idt77252_fbq_full(card, queue))
1840 return -1;
1841
1842 memset(&skb->data[(skb->len & ~(0x3f)) - 64], 0, 2 * sizeof(u32));
1843
1844 handle = IDT77252_PRV_POOL(skb);
1845 addr = IDT77252_PRV_PADDR(skb);
1846
1847 spin_lock_irqsave(&card->cmd_lock, flags);
1848 writel(handle, card->fbq[queue]);
1849 writel(addr, card->fbq[queue]);
1850 spin_unlock_irqrestore(&card->cmd_lock, flags);
1851
1852 return 0;
1853 }
1854
1855 static void
1856 add_rx_skb(struct idt77252_dev *card, int queue,
1857 unsigned int size, unsigned int count)
1858 {
1859 struct sk_buff *skb;
1860 dma_addr_t paddr;
1861 u32 handle;
1862
1863 while (count--) {
1864 skb = dev_alloc_skb(size);
1865 if (!skb)
1866 return;
1867
1868 if (sb_pool_add(card, skb, queue)) {
1869 printk("%s: SB POOL full\n", __func__);
1870 goto outfree;
1871 }
1872
1873 paddr = pci_map_single(card->pcidev, skb->data,
1874 skb_end_pointer(skb) - skb->data,
1875 PCI_DMA_FROMDEVICE);
1876 IDT77252_PRV_PADDR(skb) = paddr;
1877
1878 if (push_rx_skb(card, skb, queue)) {
1879 printk("%s: FB QUEUE full\n", __func__);
1880 goto outunmap;
1881 }
1882 }
1883
1884 return;
1885
1886 outunmap:
1887 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
1888 skb_end_pointer(skb) - skb->data, PCI_DMA_FROMDEVICE);
1889
1890 handle = IDT77252_PRV_POOL(skb);
1891 card->sbpool[POOL_QUEUE(handle)].skb[POOL_INDEX(handle)] = NULL;
1892
1893 outfree:
1894 dev_kfree_skb(skb);
1895 }
1896
1897
1898 static void
1899 recycle_rx_skb(struct idt77252_dev *card, struct sk_buff *skb)
1900 {
1901 u32 handle = IDT77252_PRV_POOL(skb);
1902 int err;
1903
1904 pci_dma_sync_single_for_device(card->pcidev, IDT77252_PRV_PADDR(skb),
1905 skb_end_pointer(skb) - skb->data,
1906 PCI_DMA_FROMDEVICE);
1907
1908 err = push_rx_skb(card, skb, POOL_QUEUE(handle));
1909 if (err) {
1910 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
1911 skb_end_pointer(skb) - skb->data,
1912 PCI_DMA_FROMDEVICE);
1913 sb_pool_remove(card, skb);
1914 dev_kfree_skb(skb);
1915 }
1916 }
1917
1918 static void
1919 flush_rx_pool(struct idt77252_dev *card, struct rx_pool *rpp)
1920 {
1921 rpp->len = 0;
1922 rpp->count = 0;
1923 rpp->first = NULL;
1924 rpp->last = &rpp->first;
1925 }
1926
1927 static void
1928 recycle_rx_pool_skb(struct idt77252_dev *card, struct rx_pool *rpp)
1929 {
1930 struct sk_buff *skb, *next;
1931 int i;
1932
1933 skb = rpp->first;
1934 for (i = 0; i < rpp->count; i++) {
1935 next = skb->next;
1936 skb->next = NULL;
1937 recycle_rx_skb(card, skb);
1938 skb = next;
1939 }
1940 flush_rx_pool(card, rpp);
1941 }
1942
1943 /*****************************************************************************/
1944 /* */
1945 /* ATM Interface */
1946 /* */
1947 /*****************************************************************************/
1948
1949 static void
1950 idt77252_phy_put(struct atm_dev *dev, unsigned char value, unsigned long addr)
1951 {
1952 write_utility(dev->dev_data, 0x100 + (addr & 0x1ff), value);
1953 }
1954
1955 static unsigned char
1956 idt77252_phy_get(struct atm_dev *dev, unsigned long addr)
1957 {
1958 return read_utility(dev->dev_data, 0x100 + (addr & 0x1ff));
1959 }
1960
1961 static inline int
1962 idt77252_send_skb(struct atm_vcc *vcc, struct sk_buff *skb, int oam)
1963 {
1964 struct atm_dev *dev = vcc->dev;
1965 struct idt77252_dev *card = dev->dev_data;
1966 struct vc_map *vc = vcc->dev_data;
1967 int err;
1968
1969 if (vc == NULL) {
1970 printk("%s: NULL connection in send().\n", card->name);
1971 atomic_inc(&vcc->stats->tx_err);
1972 dev_kfree_skb(skb);
1973 return -EINVAL;
1974 }
1975 if (!test_bit(VCF_TX, &vc->flags)) {
1976 printk("%s: Trying to transmit on a non-tx VC.\n", card->name);
1977 atomic_inc(&vcc->stats->tx_err);
1978 dev_kfree_skb(skb);
1979 return -EINVAL;
1980 }
1981
1982 switch (vcc->qos.aal) {
1983 case ATM_AAL0:
1984 case ATM_AAL1:
1985 case ATM_AAL5:
1986 break;
1987 default:
1988 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal);
1989 atomic_inc(&vcc->stats->tx_err);
1990 dev_kfree_skb(skb);
1991 return -EINVAL;
1992 }
1993
1994 if (skb_shinfo(skb)->nr_frags != 0) {
1995 printk("%s: No scatter-gather yet.\n", card->name);
1996 atomic_inc(&vcc->stats->tx_err);
1997 dev_kfree_skb(skb);
1998 return -EINVAL;
1999 }
2000 ATM_SKB(skb)->vcc = vcc;
2001
2002 err = queue_skb(card, vc, skb, oam);
2003 if (err) {
2004 atomic_inc(&vcc->stats->tx_err);
2005 dev_kfree_skb(skb);
2006 return err;
2007 }
2008
2009 return 0;
2010 }
2011
2012 static int idt77252_send(struct atm_vcc *vcc, struct sk_buff *skb)
2013 {
2014 return idt77252_send_skb(vcc, skb, 0);
2015 }
2016
2017 static int
2018 idt77252_send_oam(struct atm_vcc *vcc, void *cell, int flags)
2019 {
2020 struct atm_dev *dev = vcc->dev;
2021 struct idt77252_dev *card = dev->dev_data;
2022 struct sk_buff *skb;
2023
2024 skb = dev_alloc_skb(64);
2025 if (!skb) {
2026 printk("%s: Out of memory in send_oam().\n", card->name);
2027 atomic_inc(&vcc->stats->tx_err);
2028 return -ENOMEM;
2029 }
2030 atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
2031
2032 memcpy(skb_put(skb, 52), cell, 52);
2033
2034 return idt77252_send_skb(vcc, skb, 1);
2035 }
2036
2037 static __inline__ unsigned int
2038 idt77252_fls(unsigned int x)
2039 {
2040 int r = 1;
2041
2042 if (x == 0)
2043 return 0;
2044 if (x & 0xffff0000) {
2045 x >>= 16;
2046 r += 16;
2047 }
2048 if (x & 0xff00) {
2049 x >>= 8;
2050 r += 8;
2051 }
2052 if (x & 0xf0) {
2053 x >>= 4;
2054 r += 4;
2055 }
2056 if (x & 0xc) {
2057 x >>= 2;
2058 r += 2;
2059 }
2060 if (x & 0x2)
2061 r += 1;
2062 return r;
2063 }
2064
2065 static u16
2066 idt77252_int_to_atmfp(unsigned int rate)
2067 {
2068 u16 m, e;
2069
2070 if (rate == 0)
2071 return 0;
2072 e = idt77252_fls(rate) - 1;
2073 if (e < 9)
2074 m = (rate - (1 << e)) << (9 - e);
2075 else if (e == 9)
2076 m = (rate - (1 << e));
2077 else /* e > 9 */
2078 m = (rate - (1 << e)) >> (e - 9);
2079 return 0x4000 | (e << 9) | m;
2080 }
2081
2082 static u8
2083 idt77252_rate_logindex(struct idt77252_dev *card, int pcr)
2084 {
2085 u16 afp;
2086
2087 afp = idt77252_int_to_atmfp(pcr < 0 ? -pcr : pcr);
2088 if (pcr < 0)
2089 return rate_to_log[(afp >> 5) & 0x1ff];
2090 return rate_to_log[((afp >> 5) + 1) & 0x1ff];
2091 }
2092
2093 static void
2094 idt77252_est_timer(unsigned long data)
2095 {
2096 struct vc_map *vc = (struct vc_map *)data;
2097 struct idt77252_dev *card = vc->card;
2098 struct rate_estimator *est;
2099 unsigned long flags;
2100 u32 rate, cps;
2101 u64 ncells;
2102 u8 lacr;
2103
2104 spin_lock_irqsave(&vc->lock, flags);
2105 est = vc->estimator;
2106 if (!est)
2107 goto out;
2108
2109 ncells = est->cells;
2110
2111 rate = ((u32)(ncells - est->last_cells)) << (7 - est->interval);
2112 est->last_cells = ncells;
2113 est->avcps += ((long)rate - (long)est->avcps) >> est->ewma_log;
2114 est->cps = (est->avcps + 0x1f) >> 5;
2115
2116 cps = est->cps;
2117 if (cps < (est->maxcps >> 4))
2118 cps = est->maxcps >> 4;
2119
2120 lacr = idt77252_rate_logindex(card, cps);
2121 if (lacr > vc->max_er)
2122 lacr = vc->max_er;
2123
2124 if (lacr != vc->lacr) {
2125 vc->lacr = lacr;
2126 writel(TCMDQ_LACR|(vc->lacr << 16)|vc->index, SAR_REG_TCMDQ);
2127 }
2128
2129 est->timer.expires = jiffies + ((HZ / 4) << est->interval);
2130 add_timer(&est->timer);
2131
2132 out:
2133 spin_unlock_irqrestore(&vc->lock, flags);
2134 }
2135
2136 static struct rate_estimator *
2137 idt77252_init_est(struct vc_map *vc, int pcr)
2138 {
2139 struct rate_estimator *est;
2140
2141 est = kzalloc(sizeof(struct rate_estimator), GFP_KERNEL);
2142 if (!est)
2143 return NULL;
2144 est->maxcps = pcr < 0 ? -pcr : pcr;
2145 est->cps = est->maxcps;
2146 est->avcps = est->cps << 5;
2147
2148 est->interval = 2; /* XXX: make this configurable */
2149 est->ewma_log = 2; /* XXX: make this configurable */
2150 init_timer(&est->timer);
2151 est->timer.data = (unsigned long)vc;
2152 est->timer.function = idt77252_est_timer;
2153
2154 est->timer.expires = jiffies + ((HZ / 4) << est->interval);
2155 add_timer(&est->timer);
2156
2157 return est;
2158 }
2159
2160 static int
2161 idt77252_init_cbr(struct idt77252_dev *card, struct vc_map *vc,
2162 struct atm_vcc *vcc, struct atm_qos *qos)
2163 {
2164 int tst_free, tst_used, tst_entries;
2165 unsigned long tmpl, modl;
2166 int tcr, tcra;
2167
2168 if ((qos->txtp.max_pcr == 0) &&
2169 (qos->txtp.pcr == 0) && (qos->txtp.min_pcr == 0)) {
2170 printk("%s: trying to open a CBR VC with cell rate = 0\n",
2171 card->name);
2172 return -EINVAL;
2173 }
2174
2175 tst_used = 0;
2176 tst_free = card->tst_free;
2177 if (test_bit(VCF_TX, &vc->flags))
2178 tst_used = vc->ntste;
2179 tst_free += tst_used;
2180
2181 tcr = atm_pcr_goal(&qos->txtp);
2182 tcra = tcr >= 0 ? tcr : -tcr;
2183
2184 TXPRINTK("%s: CBR target cell rate = %d\n", card->name, tcra);
2185
2186 tmpl = (unsigned long) tcra * ((unsigned long) card->tst_size - 2);
2187 modl = tmpl % (unsigned long)card->utopia_pcr;
2188
2189 tst_entries = (int) (tmpl / card->utopia_pcr);
2190 if (tcr > 0) {
2191 if (modl > 0)
2192 tst_entries++;
2193 } else if (tcr == 0) {
2194 tst_entries = tst_free - SAR_TST_RESERVED;
2195 if (tst_entries <= 0) {
2196 printk("%s: no CBR bandwidth free.\n", card->name);
2197 return -ENOSR;
2198 }
2199 }
2200
2201 if (tst_entries == 0) {
2202 printk("%s: selected CBR bandwidth < granularity.\n",
2203 card->name);
2204 return -EINVAL;
2205 }
2206
2207 if (tst_entries > (tst_free - SAR_TST_RESERVED)) {
2208 printk("%s: not enough CBR bandwidth free.\n", card->name);
2209 return -ENOSR;
2210 }
2211
2212 vc->ntste = tst_entries;
2213
2214 card->tst_free = tst_free - tst_entries;
2215 if (test_bit(VCF_TX, &vc->flags)) {
2216 if (tst_used == tst_entries)
2217 return 0;
2218
2219 OPRINTK("%s: modify %d -> %d entries in TST.\n",
2220 card->name, tst_used, tst_entries);
2221 change_tst(card, vc, tst_entries, TSTE_OPC_CBR);
2222 return 0;
2223 }
2224
2225 OPRINTK("%s: setting %d entries in TST.\n", card->name, tst_entries);
2226 fill_tst(card, vc, tst_entries, TSTE_OPC_CBR);
2227 return 0;
2228 }
2229
2230 static int
2231 idt77252_init_ubr(struct idt77252_dev *card, struct vc_map *vc,
2232 struct atm_vcc *vcc, struct atm_qos *qos)
2233 {
2234 unsigned long flags;
2235 int tcr;
2236
2237 spin_lock_irqsave(&vc->lock, flags);
2238 if (vc->estimator) {
2239 del_timer(&vc->estimator->timer);
2240 kfree(vc->estimator);
2241 vc->estimator = NULL;
2242 }
2243 spin_unlock_irqrestore(&vc->lock, flags);
2244
2245 tcr = atm_pcr_goal(&qos->txtp);
2246 if (tcr == 0)
2247 tcr = card->link_pcr;
2248
2249 vc->estimator = idt77252_init_est(vc, tcr);
2250
2251 vc->class = SCHED_UBR;
2252 vc->init_er = idt77252_rate_logindex(card, tcr);
2253 vc->lacr = vc->init_er;
2254 if (tcr < 0)
2255 vc->max_er = vc->init_er;
2256 else
2257 vc->max_er = 0xff;
2258
2259 return 0;
2260 }
2261
2262 static int
2263 idt77252_init_tx(struct idt77252_dev *card, struct vc_map *vc,
2264 struct atm_vcc *vcc, struct atm_qos *qos)
2265 {
2266 int error;
2267
2268 if (test_bit(VCF_TX, &vc->flags))
2269 return -EBUSY;
2270
2271 switch (qos->txtp.traffic_class) {
2272 case ATM_CBR:
2273 vc->class = SCHED_CBR;
2274 break;
2275
2276 case ATM_UBR:
2277 vc->class = SCHED_UBR;
2278 break;
2279
2280 case ATM_VBR:
2281 case ATM_ABR:
2282 default:
2283 return -EPROTONOSUPPORT;
2284 }
2285
2286 vc->scq = alloc_scq(card, vc->class);
2287 if (!vc->scq) {
2288 printk("%s: can't get SCQ.\n", card->name);
2289 return -ENOMEM;
2290 }
2291
2292 vc->scq->scd = get_free_scd(card, vc);
2293 if (vc->scq->scd == 0) {
2294 printk("%s: no SCD available.\n", card->name);
2295 free_scq(card, vc->scq);
2296 return -ENOMEM;
2297 }
2298
2299 fill_scd(card, vc->scq, vc->class);
2300
2301 if (set_tct(card, vc)) {
2302 printk("%s: class %d not supported.\n",
2303 card->name, qos->txtp.traffic_class);
2304
2305 card->scd2vc[vc->scd_index] = NULL;
2306 free_scq(card, vc->scq);
2307 return -EPROTONOSUPPORT;
2308 }
2309
2310 switch (vc->class) {
2311 case SCHED_CBR:
2312 error = idt77252_init_cbr(card, vc, vcc, qos);
2313 if (error) {
2314 card->scd2vc[vc->scd_index] = NULL;
2315 free_scq(card, vc->scq);
2316 return error;
2317 }
2318
2319 clear_bit(VCF_IDLE, &vc->flags);
2320 writel(TCMDQ_START | vc->index, SAR_REG_TCMDQ);
2321 break;
2322
2323 case SCHED_UBR:
2324 error = idt77252_init_ubr(card, vc, vcc, qos);
2325 if (error) {
2326 card->scd2vc[vc->scd_index] = NULL;
2327 free_scq(card, vc->scq);
2328 return error;
2329 }
2330
2331 set_bit(VCF_IDLE, &vc->flags);
2332 break;
2333 }
2334
2335 vc->tx_vcc = vcc;
2336 set_bit(VCF_TX, &vc->flags);
2337 return 0;
2338 }
2339
2340 static int
2341 idt77252_init_rx(struct idt77252_dev *card, struct vc_map *vc,
2342 struct atm_vcc *vcc, struct atm_qos *qos)
2343 {
2344 unsigned long flags;
2345 unsigned long addr;
2346 u32 rcte = 0;
2347
2348 if (test_bit(VCF_RX, &vc->flags))
2349 return -EBUSY;
2350
2351 vc->rx_vcc = vcc;
2352 set_bit(VCF_RX, &vc->flags);
2353
2354 if ((vcc->vci == 3) || (vcc->vci == 4))
2355 return 0;
2356
2357 flush_rx_pool(card, &vc->rcv.rx_pool);
2358
2359 rcte |= SAR_RCTE_CONNECTOPEN;
2360 rcte |= SAR_RCTE_RAWCELLINTEN;
2361
2362 switch (qos->aal) {
2363 case ATM_AAL0:
2364 rcte |= SAR_RCTE_RCQ;
2365 break;
2366 case ATM_AAL1:
2367 rcte |= SAR_RCTE_OAM; /* Let SAR drop Video */
2368 break;
2369 case ATM_AAL34:
2370 rcte |= SAR_RCTE_AAL34;
2371 break;
2372 case ATM_AAL5:
2373 rcte |= SAR_RCTE_AAL5;
2374 break;
2375 default:
2376 rcte |= SAR_RCTE_RCQ;
2377 break;
2378 }
2379
2380 if (qos->aal != ATM_AAL5)
2381 rcte |= SAR_RCTE_FBP_1;
2382 else if (qos->rxtp.max_sdu > SAR_FB_SIZE_2)
2383 rcte |= SAR_RCTE_FBP_3;
2384 else if (qos->rxtp.max_sdu > SAR_FB_SIZE_1)
2385 rcte |= SAR_RCTE_FBP_2;
2386 else if (qos->rxtp.max_sdu > SAR_FB_SIZE_0)
2387 rcte |= SAR_RCTE_FBP_1;
2388 else
2389 rcte |= SAR_RCTE_FBP_01;
2390
2391 addr = card->rct_base + (vc->index << 2);
2392
2393 OPRINTK("%s: writing RCT at 0x%lx\n", card->name, addr);
2394 write_sram(card, addr, rcte);
2395
2396 spin_lock_irqsave(&card->cmd_lock, flags);
2397 writel(SAR_CMD_OPEN_CONNECTION | (addr << 2), SAR_REG_CMD);
2398 waitfor_idle(card);
2399 spin_unlock_irqrestore(&card->cmd_lock, flags);
2400
2401 return 0;
2402 }
2403
2404 static int
2405 idt77252_open(struct atm_vcc *vcc)
2406 {
2407 struct atm_dev *dev = vcc->dev;
2408 struct idt77252_dev *card = dev->dev_data;
2409 struct vc_map *vc;
2410 unsigned int index;
2411 unsigned int inuse;
2412 int error;
2413 int vci = vcc->vci;
2414 short vpi = vcc->vpi;
2415
2416 if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC)
2417 return 0;
2418
2419 if (vpi >= (1 << card->vpibits)) {
2420 printk("%s: unsupported VPI: %d\n", card->name, vpi);
2421 return -EINVAL;
2422 }
2423
2424 if (vci >= (1 << card->vcibits)) {
2425 printk("%s: unsupported VCI: %d\n", card->name, vci);
2426 return -EINVAL;
2427 }
2428
2429 set_bit(ATM_VF_ADDR, &vcc->flags);
2430
2431 mutex_lock(&card->mutex);
2432
2433 OPRINTK("%s: opening vpi.vci: %d.%d\n", card->name, vpi, vci);
2434
2435 switch (vcc->qos.aal) {
2436 case ATM_AAL0:
2437 case ATM_AAL1:
2438 case ATM_AAL5:
2439 break;
2440 default:
2441 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal);
2442 mutex_unlock(&card->mutex);
2443 return -EPROTONOSUPPORT;
2444 }
2445
2446 index = VPCI2VC(card, vpi, vci);
2447 if (!card->vcs[index]) {
2448 card->vcs[index] = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2449 if (!card->vcs[index]) {
2450 printk("%s: can't alloc vc in open()\n", card->name);
2451 mutex_unlock(&card->mutex);
2452 return -ENOMEM;
2453 }
2454 card->vcs[index]->card = card;
2455 card->vcs[index]->index = index;
2456
2457 spin_lock_init(&card->vcs[index]->lock);
2458 }
2459 vc = card->vcs[index];
2460
2461 vcc->dev_data = vc;
2462
2463 IPRINTK("%s: idt77252_open: vc = %d (%d.%d) %s/%s (max RX SDU: %u)\n",
2464 card->name, vc->index, vcc->vpi, vcc->vci,
2465 vcc->qos.rxtp.traffic_class != ATM_NONE ? "rx" : "--",
2466 vcc->qos.txtp.traffic_class != ATM_NONE ? "tx" : "--",
2467 vcc->qos.rxtp.max_sdu);
2468
2469 inuse = 0;
2470 if (vcc->qos.txtp.traffic_class != ATM_NONE &&
2471 test_bit(VCF_TX, &vc->flags))
2472 inuse = 1;
2473 if (vcc->qos.rxtp.traffic_class != ATM_NONE &&
2474 test_bit(VCF_RX, &vc->flags))
2475 inuse += 2;
2476
2477 if (inuse) {
2478 printk("%s: %s vci already in use.\n", card->name,
2479 inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx");
2480 mutex_unlock(&card->mutex);
2481 return -EADDRINUSE;
2482 }
2483
2484 if (vcc->qos.txtp.traffic_class != ATM_NONE) {
2485 error = idt77252_init_tx(card, vc, vcc, &vcc->qos);
2486 if (error) {
2487 mutex_unlock(&card->mutex);
2488 return error;
2489 }
2490 }
2491
2492 if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
2493 error = idt77252_init_rx(card, vc, vcc, &vcc->qos);
2494 if (error) {
2495 mutex_unlock(&card->mutex);
2496 return error;
2497 }
2498 }
2499
2500 set_bit(ATM_VF_READY, &vcc->flags);
2501
2502 mutex_unlock(&card->mutex);
2503 return 0;
2504 }
2505
2506 static void
2507 idt77252_close(struct atm_vcc *vcc)
2508 {
2509 struct atm_dev *dev = vcc->dev;
2510 struct idt77252_dev *card = dev->dev_data;
2511 struct vc_map *vc = vcc->dev_data;
2512 unsigned long flags;
2513 unsigned long addr;
2514 unsigned long timeout;
2515
2516 mutex_lock(&card->mutex);
2517
2518 IPRINTK("%s: idt77252_close: vc = %d (%d.%d)\n",
2519 card->name, vc->index, vcc->vpi, vcc->vci);
2520
2521 clear_bit(ATM_VF_READY, &vcc->flags);
2522
2523 if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
2524
2525 spin_lock_irqsave(&vc->lock, flags);
2526 clear_bit(VCF_RX, &vc->flags);
2527 vc->rx_vcc = NULL;
2528 spin_unlock_irqrestore(&vc->lock, flags);
2529
2530 if ((vcc->vci == 3) || (vcc->vci == 4))
2531 goto done;
2532
2533 addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE;
2534
2535 spin_lock_irqsave(&card->cmd_lock, flags);
2536 writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2), SAR_REG_CMD);
2537 waitfor_idle(card);
2538 spin_unlock_irqrestore(&card->cmd_lock, flags);
2539
2540 if (vc->rcv.rx_pool.count) {
2541 DPRINTK("%s: closing a VC with pending rx buffers.\n",
2542 card->name);
2543
2544 recycle_rx_pool_skb(card, &vc->rcv.rx_pool);
2545 }
2546 }
2547
2548 done:
2549 if (vcc->qos.txtp.traffic_class != ATM_NONE) {
2550
2551 spin_lock_irqsave(&vc->lock, flags);
2552 clear_bit(VCF_TX, &vc->flags);
2553 clear_bit(VCF_IDLE, &vc->flags);
2554 clear_bit(VCF_RSV, &vc->flags);
2555 vc->tx_vcc = NULL;
2556
2557 if (vc->estimator) {
2558 del_timer(&vc->estimator->timer);
2559 kfree(vc->estimator);
2560 vc->estimator = NULL;
2561 }
2562 spin_unlock_irqrestore(&vc->lock, flags);
2563
2564 timeout = 5 * 1000;
2565 while (atomic_read(&vc->scq->used) > 0) {
2566 timeout = msleep_interruptible(timeout);
2567 if (!timeout)
2568 break;
2569 }
2570 if (!timeout)
2571 printk("%s: SCQ drain timeout: %u used\n",
2572 card->name, atomic_read(&vc->scq->used));
2573
2574 writel(TCMDQ_HALT | vc->index, SAR_REG_TCMDQ);
2575 clear_scd(card, vc->scq, vc->class);
2576
2577 if (vc->class == SCHED_CBR) {
2578 clear_tst(card, vc);
2579 card->tst_free += vc->ntste;
2580 vc->ntste = 0;
2581 }
2582
2583 card->scd2vc[vc->scd_index] = NULL;
2584 free_scq(card, vc->scq);
2585 }
2586
2587 mutex_unlock(&card->mutex);
2588 }
2589
2590 static int
2591 idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos, int flags)
2592 {
2593 struct atm_dev *dev = vcc->dev;
2594 struct idt77252_dev *card = dev->dev_data;
2595 struct vc_map *vc = vcc->dev_data;
2596 int error = 0;
2597
2598 mutex_lock(&card->mutex);
2599
2600 if (qos->txtp.traffic_class != ATM_NONE) {
2601 if (!test_bit(VCF_TX, &vc->flags)) {
2602 error = idt77252_init_tx(card, vc, vcc, qos);
2603 if (error)
2604 goto out;
2605 } else {
2606 switch (qos->txtp.traffic_class) {
2607 case ATM_CBR:
2608 error = idt77252_init_cbr(card, vc, vcc, qos);
2609 if (error)
2610 goto out;
2611 break;
2612
2613 case ATM_UBR:
2614 error = idt77252_init_ubr(card, vc, vcc, qos);
2615 if (error)
2616 goto out;
2617
2618 if (!test_bit(VCF_IDLE, &vc->flags)) {
2619 writel(TCMDQ_LACR | (vc->lacr << 16) |
2620 vc->index, SAR_REG_TCMDQ);
2621 }
2622 break;
2623
2624 case ATM_VBR:
2625 case ATM_ABR:
2626 error = -EOPNOTSUPP;
2627 goto out;
2628 }
2629 }
2630 }
2631
2632 if ((qos->rxtp.traffic_class != ATM_NONE) &&
2633 !test_bit(VCF_RX, &vc->flags)) {
2634 error = idt77252_init_rx(card, vc, vcc, qos);
2635 if (error)
2636 goto out;
2637 }
2638
2639 memcpy(&vcc->qos, qos, sizeof(struct atm_qos));
2640
2641 set_bit(ATM_VF_HASQOS, &vcc->flags);
2642
2643 out:
2644 mutex_unlock(&card->mutex);
2645 return error;
2646 }
2647
2648 static int
2649 idt77252_proc_read(struct atm_dev *dev, loff_t * pos, char *page)
2650 {
2651 struct idt77252_dev *card = dev->dev_data;
2652 int i, left;
2653
2654 left = (int) *pos;
2655 if (!left--)
2656 return sprintf(page, "IDT77252 Interrupts:\n");
2657 if (!left--)
2658 return sprintf(page, "TSIF: %lu\n", card->irqstat[15]);
2659 if (!left--)
2660 return sprintf(page, "TXICP: %lu\n", card->irqstat[14]);
2661 if (!left--)
2662 return sprintf(page, "TSQF: %lu\n", card->irqstat[12]);
2663 if (!left--)
2664 return sprintf(page, "TMROF: %lu\n", card->irqstat[11]);
2665 if (!left--)
2666 return sprintf(page, "PHYI: %lu\n", card->irqstat[10]);
2667 if (!left--)
2668 return sprintf(page, "FBQ3A: %lu\n", card->irqstat[8]);
2669 if (!left--)
2670 return sprintf(page, "FBQ2A: %lu\n", card->irqstat[7]);
2671 if (!left--)
2672 return sprintf(page, "RSQF: %lu\n", card->irqstat[6]);
2673 if (!left--)
2674 return sprintf(page, "EPDU: %lu\n", card->irqstat[5]);
2675 if (!left--)
2676 return sprintf(page, "RAWCF: %lu\n", card->irqstat[4]);
2677 if (!left--)
2678 return sprintf(page, "FBQ1A: %lu\n", card->irqstat[3]);
2679 if (!left--)
2680 return sprintf(page, "FBQ0A: %lu\n", card->irqstat[2]);
2681 if (!left--)
2682 return sprintf(page, "RSQAF: %lu\n", card->irqstat[1]);
2683 if (!left--)
2684 return sprintf(page, "IDT77252 Transmit Connection Table:\n");
2685
2686 for (i = 0; i < card->tct_size; i++) {
2687 unsigned long tct;
2688 struct atm_vcc *vcc;
2689 struct vc_map *vc;
2690 char *p;
2691
2692 vc = card->vcs[i];
2693 if (!vc)
2694 continue;
2695
2696 vcc = NULL;
2697 if (vc->tx_vcc)
2698 vcc = vc->tx_vcc;
2699 if (!vcc)
2700 continue;
2701 if (left--)
2702 continue;
2703
2704 p = page;
2705 p += sprintf(p, " %4u: %u.%u: ", i, vcc->vpi, vcc->vci);
2706 tct = (unsigned long) (card->tct_base + i * SAR_SRAM_TCT_SIZE);
2707
2708 for (i = 0; i < 8; i++)
2709 p += sprintf(p, " %08x", read_sram(card, tct + i));
2710 p += sprintf(p, "\n");
2711 return p - page;
2712 }
2713 return 0;
2714 }
2715
2716 /*****************************************************************************/
2717 /* */
2718 /* Interrupt handler */
2719 /* */
2720 /*****************************************************************************/
2721
2722 static void
2723 idt77252_collect_stat(struct idt77252_dev *card)
2724 {
2725 u32 cdc, vpec, icc;
2726
2727 cdc = readl(SAR_REG_CDC);
2728 vpec = readl(SAR_REG_VPEC);
2729 icc = readl(SAR_REG_ICC);
2730
2731 #ifdef NOTDEF
2732 printk("%s:", card->name);
2733
2734 if (cdc & 0x7f0000) {
2735 char *s = "";
2736
2737 printk(" [");
2738 if (cdc & (1 << 22)) {
2739 printk("%sRM ID", s);
2740 s = " | ";
2741 }
2742 if (cdc & (1 << 21)) {
2743 printk("%sCON TAB", s);
2744 s = " | ";
2745 }
2746 if (cdc & (1 << 20)) {
2747 printk("%sNO FB", s);
2748 s = " | ";
2749 }
2750 if (cdc & (1 << 19)) {
2751 printk("%sOAM CRC", s);
2752 s = " | ";
2753 }
2754 if (cdc & (1 << 18)) {
2755 printk("%sRM CRC", s);
2756 s = " | ";
2757 }
2758 if (cdc & (1 << 17)) {
2759 printk("%sRM FIFO", s);
2760 s = " | ";
2761 }
2762 if (cdc & (1 << 16)) {
2763 printk("%sRX FIFO", s);
2764 s = " | ";
2765 }
2766 printk("]");
2767 }
2768
2769 printk(" CDC %04x, VPEC %04x, ICC: %04x\n",
2770 cdc & 0xffff, vpec & 0xffff, icc & 0xffff);
2771 #endif
2772 }
2773
2774 static irqreturn_t
2775 idt77252_interrupt(int irq, void *dev_id)
2776 {
2777 struct idt77252_dev *card = dev_id;
2778 u32 stat;
2779
2780 stat = readl(SAR_REG_STAT) & 0xffff;
2781 if (!stat) /* no interrupt for us */
2782 return IRQ_NONE;
2783
2784 if (test_and_set_bit(IDT77252_BIT_INTERRUPT, &card->flags)) {
2785 printk("%s: Re-entering irq_handler()\n", card->name);
2786 goto out;
2787 }
2788
2789 writel(stat, SAR_REG_STAT); /* reset interrupt */
2790
2791 if (stat & SAR_STAT_TSIF) { /* entry written to TSQ */
2792 INTPRINTK("%s: TSIF\n", card->name);
2793 card->irqstat[15]++;
2794 idt77252_tx(card);
2795 }
2796 if (stat & SAR_STAT_TXICP) { /* Incomplete CS-PDU has */
2797 INTPRINTK("%s: TXICP\n", card->name);
2798 card->irqstat[14]++;
2799 #ifdef CONFIG_ATM_IDT77252_DEBUG
2800 idt77252_tx_dump(card);
2801 #endif
2802 }
2803 if (stat & SAR_STAT_TSQF) { /* TSQ 7/8 full */
2804 INTPRINTK("%s: TSQF\n", card->name);
2805 card->irqstat[12]++;
2806 idt77252_tx(card);
2807 }
2808 if (stat & SAR_STAT_TMROF) { /* Timer overflow */
2809 INTPRINTK("%s: TMROF\n", card->name);
2810 card->irqstat[11]++;
2811 idt77252_collect_stat(card);
2812 }
2813
2814 if (stat & SAR_STAT_EPDU) { /* Got complete CS-PDU */
2815 INTPRINTK("%s: EPDU\n", card->name);
2816 card->irqstat[5]++;
2817 idt77252_rx(card);
2818 }
2819 if (stat & SAR_STAT_RSQAF) { /* RSQ is 7/8 full */
2820 INTPRINTK("%s: RSQAF\n", card->name);
2821 card->irqstat[1]++;
2822 idt77252_rx(card);
2823 }
2824 if (stat & SAR_STAT_RSQF) { /* RSQ is full */
2825 INTPRINTK("%s: RSQF\n", card->name);
2826 card->irqstat[6]++;
2827 idt77252_rx(card);
2828 }
2829 if (stat & SAR_STAT_RAWCF) { /* Raw cell received */
2830 INTPRINTK("%s: RAWCF\n", card->name);
2831 card->irqstat[4]++;
2832 idt77252_rx_raw(card);
2833 }
2834
2835 if (stat & SAR_STAT_PHYI) { /* PHY device interrupt */
2836 INTPRINTK("%s: PHYI", card->name);
2837 card->irqstat[10]++;
2838 if (card->atmdev->phy && card->atmdev->phy->interrupt)
2839 card->atmdev->phy->interrupt(card->atmdev);
2840 }
2841
2842 if (stat & (SAR_STAT_FBQ0A | SAR_STAT_FBQ1A |
2843 SAR_STAT_FBQ2A | SAR_STAT_FBQ3A)) {
2844
2845 writel(readl(SAR_REG_CFG) & ~(SAR_CFG_FBIE), SAR_REG_CFG);
2846
2847 INTPRINTK("%s: FBQA: %04x\n", card->name, stat);
2848
2849 if (stat & SAR_STAT_FBQ0A)
2850 card->irqstat[2]++;
2851 if (stat & SAR_STAT_FBQ1A)
2852 card->irqstat[3]++;
2853 if (stat & SAR_STAT_FBQ2A)
2854 card->irqstat[7]++;
2855 if (stat & SAR_STAT_FBQ3A)
2856 card->irqstat[8]++;
2857
2858 schedule_work(&card->tqueue);
2859 }
2860
2861 out:
2862 clear_bit(IDT77252_BIT_INTERRUPT, &card->flags);
2863 return IRQ_HANDLED;
2864 }
2865
2866 static void
2867 idt77252_softint(struct work_struct *work)
2868 {
2869 struct idt77252_dev *card =
2870 container_of(work, struct idt77252_dev, tqueue);
2871 u32 stat;
2872 int done;
2873
2874 for (done = 1; ; done = 1) {
2875 stat = readl(SAR_REG_STAT) >> 16;
2876
2877 if ((stat & 0x0f) < SAR_FBQ0_HIGH) {
2878 add_rx_skb(card, 0, SAR_FB_SIZE_0, 32);
2879 done = 0;
2880 }
2881
2882 stat >>= 4;
2883 if ((stat & 0x0f) < SAR_FBQ1_HIGH) {
2884 add_rx_skb(card, 1, SAR_FB_SIZE_1, 32);
2885 done = 0;
2886 }
2887
2888 stat >>= 4;
2889 if ((stat & 0x0f) < SAR_FBQ2_HIGH) {
2890 add_rx_skb(card, 2, SAR_FB_SIZE_2, 32);
2891 done = 0;
2892 }
2893
2894 stat >>= 4;
2895 if ((stat & 0x0f) < SAR_FBQ3_HIGH) {
2896 add_rx_skb(card, 3, SAR_FB_SIZE_3, 32);
2897 done = 0;
2898 }
2899
2900 if (done)
2901 break;
2902 }
2903
2904 writel(readl(SAR_REG_CFG) | SAR_CFG_FBIE, SAR_REG_CFG);
2905 }
2906
2907
2908 static int
2909 open_card_oam(struct idt77252_dev *card)
2910 {
2911 unsigned long flags;
2912 unsigned long addr;
2913 struct vc_map *vc;
2914 int vpi, vci;
2915 int index;
2916 u32 rcte;
2917
2918 for (vpi = 0; vpi < (1 << card->vpibits); vpi++) {
2919 for (vci = 3; vci < 5; vci++) {
2920 index = VPCI2VC(card, vpi, vci);
2921
2922 vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2923 if (!vc) {
2924 printk("%s: can't alloc vc\n", card->name);
2925 return -ENOMEM;
2926 }
2927 vc->index = index;
2928 card->vcs[index] = vc;
2929
2930 flush_rx_pool(card, &vc->rcv.rx_pool);
2931
2932 rcte = SAR_RCTE_CONNECTOPEN |
2933 SAR_RCTE_RAWCELLINTEN |
2934 SAR_RCTE_RCQ |
2935 SAR_RCTE_FBP_1;
2936
2937 addr = card->rct_base + (vc->index << 2);
2938 write_sram(card, addr, rcte);
2939
2940 spin_lock_irqsave(&card->cmd_lock, flags);
2941 writel(SAR_CMD_OPEN_CONNECTION | (addr << 2),
2942 SAR_REG_CMD);
2943 waitfor_idle(card);
2944 spin_unlock_irqrestore(&card->cmd_lock, flags);
2945 }
2946 }
2947
2948 return 0;
2949 }
2950
2951 static void
2952 close_card_oam(struct idt77252_dev *card)
2953 {
2954 unsigned long flags;
2955 unsigned long addr;
2956 struct vc_map *vc;
2957 int vpi, vci;
2958 int index;
2959
2960 for (vpi = 0; vpi < (1 << card->vpibits); vpi++) {
2961 for (vci = 3; vci < 5; vci++) {
2962 index = VPCI2VC(card, vpi, vci);
2963 vc = card->vcs[index];
2964
2965 addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE;
2966
2967 spin_lock_irqsave(&card->cmd_lock, flags);
2968 writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2),
2969 SAR_REG_CMD);
2970 waitfor_idle(card);
2971 spin_unlock_irqrestore(&card->cmd_lock, flags);
2972
2973 if (vc->rcv.rx_pool.count) {
2974 DPRINTK("%s: closing a VC "
2975 "with pending rx buffers.\n",
2976 card->name);
2977
2978 recycle_rx_pool_skb(card, &vc->rcv.rx_pool);
2979 }
2980 }
2981 }
2982 }
2983
2984 static int
2985 open_card_ubr0(struct idt77252_dev *card)
2986 {
2987 struct vc_map *vc;
2988
2989 vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2990 if (!vc) {
2991 printk("%s: can't alloc vc\n", card->name);
2992 return -ENOMEM;
2993 }
2994 card->vcs[0] = vc;
2995 vc->class = SCHED_UBR0;
2996
2997 vc->scq = alloc_scq(card, vc->class);
2998 if (!vc->scq) {
2999 printk("%s: can't get SCQ.\n", card->name);
3000 return -ENOMEM;
3001 }
3002
3003 card->scd2vc[0] = vc;
3004 vc->scd_index = 0;
3005 vc->scq->scd = card->scd_base;
3006
3007 fill_scd(card, vc->scq, vc->class);
3008
3009 write_sram(card, card->tct_base + 0, TCT_UBR | card->scd_base);
3010 write_sram(card, card->tct_base + 1, 0);
3011 write_sram(card, card->tct_base + 2, 0);
3012 write_sram(card, card->tct_base + 3, 0);
3013 write_sram(card, card->tct_base + 4, 0);
3014 write_sram(card, card->tct_base + 5, 0);
3015 write_sram(card, card->tct_base + 6, 0);
3016 write_sram(card, card->tct_base + 7, TCT_FLAG_UBR);
3017
3018 clear_bit(VCF_IDLE, &vc->flags);
3019 writel(TCMDQ_START | 0, SAR_REG_TCMDQ);
3020 return 0;
3021 }
3022
3023 static int
3024 idt77252_dev_open(struct idt77252_dev *card)
3025 {
3026 u32 conf;
3027
3028 if (!test_bit(IDT77252_BIT_INIT, &card->flags)) {
3029 printk("%s: SAR not yet initialized.\n", card->name);
3030 return -1;
3031 }
3032
3033 conf = SAR_CFG_RXPTH| /* enable receive path */
3034 SAR_RX_DELAY | /* interrupt on complete PDU */
3035 SAR_CFG_RAWIE | /* interrupt enable on raw cells */
3036 SAR_CFG_RQFIE | /* interrupt on RSQ almost full */
3037 SAR_CFG_TMOIE | /* interrupt on timer overflow */
3038 SAR_CFG_FBIE | /* interrupt on low free buffers */
3039 SAR_CFG_TXEN | /* transmit operation enable */
3040 SAR_CFG_TXINT | /* interrupt on transmit status */
3041 SAR_CFG_TXUIE | /* interrupt on transmit underrun */
3042 SAR_CFG_TXSFI | /* interrupt on TSQ almost full */
3043 SAR_CFG_PHYIE /* enable PHY interrupts */
3044 ;
3045
3046 #ifdef CONFIG_ATM_IDT77252_RCV_ALL
3047 /* Test RAW cell receive. */
3048 conf |= SAR_CFG_VPECA;
3049 #endif
3050
3051 writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG);
3052
3053 if (open_card_oam(card)) {
3054 printk("%s: Error initializing OAM.\n", card->name);
3055 return -1;
3056 }
3057
3058 if (open_card_ubr0(card)) {
3059 printk("%s: Error initializing UBR0.\n", card->name);
3060 return -1;
3061 }
3062
3063 IPRINTK("%s: opened IDT77252 ABR SAR.\n", card->name);
3064 return 0;
3065 }
3066
3067 static void idt77252_dev_close(struct atm_dev *dev)
3068 {
3069 struct idt77252_dev *card = dev->dev_data;
3070 u32 conf;
3071
3072 close_card_oam(card);
3073
3074 conf = SAR_CFG_RXPTH | /* enable receive path */
3075 SAR_RX_DELAY | /* interrupt on complete PDU */
3076 SAR_CFG_RAWIE | /* interrupt enable on raw cells */
3077 SAR_CFG_RQFIE | /* interrupt on RSQ almost full */
3078 SAR_CFG_TMOIE | /* interrupt on timer overflow */
3079 SAR_CFG_FBIE | /* interrupt on low free buffers */
3080 SAR_CFG_TXEN | /* transmit operation enable */
3081 SAR_CFG_TXINT | /* interrupt on transmit status */
3082 SAR_CFG_TXUIE | /* interrupt on xmit underrun */
3083 SAR_CFG_TXSFI /* interrupt on TSQ almost full */
3084 ;
3085
3086 writel(readl(SAR_REG_CFG) & ~(conf), SAR_REG_CFG);
3087
3088 DIPRINTK("%s: closed IDT77252 ABR SAR.\n", card->name);
3089 }
3090
3091
3092 /*****************************************************************************/
3093 /* */
3094 /* Initialisation and Deinitialization of IDT77252 */
3095 /* */
3096 /*****************************************************************************/
3097
3098
3099 static void
3100 deinit_card(struct idt77252_dev *card)
3101 {
3102 struct sk_buff *skb;
3103 int i, j;
3104
3105 if (!test_bit(IDT77252_BIT_INIT, &card->flags)) {
3106 printk("%s: SAR not yet initialized.\n", card->name);
3107 return;
3108 }
3109 DIPRINTK("idt77252: deinitialize card %u\n", card->index);
3110
3111 writel(0, SAR_REG_CFG);
3112
3113 if (card->atmdev)
3114 atm_dev_deregister(card->atmdev);
3115
3116 for (i = 0; i < 4; i++) {
3117 for (j = 0; j < FBQ_SIZE; j++) {
3118 skb = card->sbpool[i].skb[j];
3119 if (skb) {
3120 pci_unmap_single(card->pcidev,
3121 IDT77252_PRV_PADDR(skb),
3122 (skb_end_pointer(skb) -
3123 skb->data),
3124 PCI_DMA_FROMDEVICE);
3125 card->sbpool[i].skb[j] = NULL;
3126 dev_kfree_skb(skb);
3127 }
3128 }
3129 }
3130
3131 vfree(card->soft_tst);
3132
3133 vfree(card->scd2vc);
3134
3135 vfree(card->vcs);
3136
3137 if (card->raw_cell_hnd) {
3138 pci_free_consistent(card->pcidev, 2 * sizeof(u32),
3139 card->raw_cell_hnd, card->raw_cell_paddr);
3140 }
3141
3142 if (card->rsq.base) {
3143 DIPRINTK("%s: Release RSQ ...\n", card->name);
3144 deinit_rsq(card);
3145 }
3146
3147 if (card->tsq.base) {
3148 DIPRINTK("%s: Release TSQ ...\n", card->name);
3149 deinit_tsq(card);
3150 }
3151
3152 DIPRINTK("idt77252: Release IRQ.\n");
3153 free_irq(card->pcidev->irq, card);
3154
3155 for (i = 0; i < 4; i++) {
3156 if (card->fbq[i])
3157 iounmap(card->fbq[i]);
3158 }
3159
3160 if (card->membase)
3161 iounmap(card->membase);
3162
3163 clear_bit(IDT77252_BIT_INIT, &card->flags);
3164 DIPRINTK("%s: Card deinitialized.\n", card->name);
3165 }
3166
3167
3168 static int __devinit
3169 init_sram(struct idt77252_dev *card)
3170 {
3171 int i;
3172
3173 for (i = 0; i < card->sramsize; i += 4)
3174 write_sram(card, (i >> 2), 0);
3175
3176 /* set SRAM layout for THIS card */
3177 if (card->sramsize == (512 * 1024)) {
3178 card->tct_base = SAR_SRAM_TCT_128_BASE;
3179 card->tct_size = (SAR_SRAM_TCT_128_TOP - card->tct_base + 1)
3180 / SAR_SRAM_TCT_SIZE;
3181 card->rct_base = SAR_SRAM_RCT_128_BASE;
3182 card->rct_size = (SAR_SRAM_RCT_128_TOP - card->rct_base + 1)
3183 / SAR_SRAM_RCT_SIZE;
3184 card->rt_base = SAR_SRAM_RT_128_BASE;
3185 card->scd_base = SAR_SRAM_SCD_128_BASE;
3186 card->scd_size = (SAR_SRAM_SCD_128_TOP - card->scd_base + 1)
3187 / SAR_SRAM_SCD_SIZE;
3188 card->tst[0] = SAR_SRAM_TST1_128_BASE;
3189 card->tst[1] = SAR_SRAM_TST2_128_BASE;
3190 card->tst_size = SAR_SRAM_TST1_128_TOP - card->tst[0] + 1;
3191 card->abrst_base = SAR_SRAM_ABRSTD_128_BASE;
3192 card->abrst_size = SAR_ABRSTD_SIZE_8K;
3193 card->fifo_base = SAR_SRAM_FIFO_128_BASE;
3194 card->fifo_size = SAR_RXFD_SIZE_32K;
3195 } else {
3196 card->tct_base = SAR_SRAM_TCT_32_BASE;
3197 card->tct_size = (SAR_SRAM_TCT_32_TOP - card->tct_base + 1)
3198 / SAR_SRAM_TCT_SIZE;
3199 card->rct_base = SAR_SRAM_RCT_32_BASE;
3200 card->rct_size = (SAR_SRAM_RCT_32_TOP - card->rct_base + 1)
3201 / SAR_SRAM_RCT_SIZE;
3202 card->rt_base = SAR_SRAM_RT_32_BASE;
3203 card->scd_base = SAR_SRAM_SCD_32_BASE;
3204 card->scd_size = (SAR_SRAM_SCD_32_TOP - card->scd_base + 1)
3205 / SAR_SRAM_SCD_SIZE;
3206 card->tst[0] = SAR_SRAM_TST1_32_BASE;
3207 card->tst[1] = SAR_SRAM_TST2_32_BASE;
3208 card->tst_size = (SAR_SRAM_TST1_32_TOP - card->tst[0] + 1);
3209 card->abrst_base = SAR_SRAM_ABRSTD_32_BASE;
3210 card->abrst_size = SAR_ABRSTD_SIZE_1K;
3211 card->fifo_base = SAR_SRAM_FIFO_32_BASE;
3212 card->fifo_size = SAR_RXFD_SIZE_4K;
3213 }
3214
3215 /* Initialize TCT */
3216 for (i = 0; i < card->tct_size; i++) {
3217 write_sram(card, i * SAR_SRAM_TCT_SIZE + 0, 0);
3218 write_sram(card, i * SAR_SRAM_TCT_SIZE + 1, 0);
3219 write_sram(card, i * SAR_SRAM_TCT_SIZE + 2, 0);
3220 write_sram(card, i * SAR_SRAM_TCT_SIZE + 3, 0);
3221 write_sram(card, i * SAR_SRAM_TCT_SIZE + 4, 0);
3222 write_sram(card, i * SAR_SRAM_TCT_SIZE + 5, 0);
3223 write_sram(card, i * SAR_SRAM_TCT_SIZE + 6, 0);
3224 write_sram(card, i * SAR_SRAM_TCT_SIZE + 7, 0);
3225 }
3226
3227 /* Initialize RCT */
3228 for (i = 0; i < card->rct_size; i++) {
3229 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE,
3230 (u32) SAR_RCTE_RAWCELLINTEN);
3231 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 1,
3232 (u32) 0);
3233 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 2,
3234 (u32) 0);
3235 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 3,
3236 (u32) 0xffffffff);
3237 }
3238
3239 writel((SAR_FBQ0_LOW << 28) | 0x00000000 | 0x00000000 |
3240 (SAR_FB_SIZE_0 / 48), SAR_REG_FBQS0);
3241 writel((SAR_FBQ1_LOW << 28) | 0x00000000 | 0x00000000 |
3242 (SAR_FB_SIZE_1 / 48), SAR_REG_FBQS1);
3243 writel((SAR_FBQ2_LOW << 28) | 0x00000000 | 0x00000000 |
3244 (SAR_FB_SIZE_2 / 48), SAR_REG_FBQS2);
3245 writel((SAR_FBQ3_LOW << 28) | 0x00000000 | 0x00000000 |
3246 (SAR_FB_SIZE_3 / 48), SAR_REG_FBQS3);
3247
3248 /* Initialize rate table */
3249 for (i = 0; i < 256; i++) {
3250 write_sram(card, card->rt_base + i, log_to_rate[i]);
3251 }
3252
3253 for (i = 0; i < 128; i++) {
3254 unsigned int tmp;
3255
3256 tmp = rate_to_log[(i << 2) + 0] << 0;
3257 tmp |= rate_to_log[(i << 2) + 1] << 8;
3258 tmp |= rate_to_log[(i << 2) + 2] << 16;
3259 tmp |= rate_to_log[(i << 2) + 3] << 24;
3260 write_sram(card, card->rt_base + 256 + i, tmp);
3261 }
3262
3263 #if 0 /* Fill RDF and AIR tables. */
3264 for (i = 0; i < 128; i++) {
3265 unsigned int tmp;
3266
3267 tmp = RDF[0][(i << 1) + 0] << 16;
3268 tmp |= RDF[0][(i << 1) + 1] << 0;
3269 write_sram(card, card->rt_base + 512 + i, tmp);
3270 }
3271
3272 for (i = 0; i < 128; i++) {
3273 unsigned int tmp;
3274
3275 tmp = AIR[0][(i << 1) + 0] << 16;
3276 tmp |= AIR[0][(i << 1) + 1] << 0;
3277 write_sram(card, card->rt_base + 640 + i, tmp);
3278 }
3279 #endif
3280
3281 IPRINTK("%s: initialize rate table ...\n", card->name);
3282 writel(card->rt_base << 2, SAR_REG_RTBL);
3283
3284 /* Initialize TSTs */
3285 IPRINTK("%s: initialize TST ...\n", card->name);
3286 card->tst_free = card->tst_size - 2; /* last two are jumps */
3287
3288 for (i = card->tst[0]; i < card->tst[0] + card->tst_size - 2; i++)
3289 write_sram(card, i, TSTE_OPC_VAR);
3290 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2));
3291 idt77252_sram_write_errors = 1;
3292 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2));
3293 idt77252_sram_write_errors = 0;
3294 for (i = card->tst[1]; i < card->tst[1] + card->tst_size - 2; i++)
3295 write_sram(card, i, TSTE_OPC_VAR);
3296 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2));
3297 idt77252_sram_write_errors = 1;
3298 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2));
3299 idt77252_sram_write_errors = 0;
3300
3301 card->tst_index = 0;
3302 writel(card->tst[0] << 2, SAR_REG_TSTB);
3303
3304 /* Initialize ABRSTD and Receive FIFO */
3305 IPRINTK("%s: initialize ABRSTD ...\n", card->name);
3306 writel(card->abrst_size | (card->abrst_base << 2),
3307 SAR_REG_ABRSTD);
3308
3309 IPRINTK("%s: initialize receive fifo ...\n", card->name);
3310 writel(card->fifo_size | (card->fifo_base << 2),
3311 SAR_REG_RXFD);
3312
3313 IPRINTK("%s: SRAM initialization complete.\n", card->name);
3314 return 0;
3315 }
3316
3317 static int __devinit
3318 init_card(struct atm_dev *dev)
3319 {
3320 struct idt77252_dev *card = dev->dev_data;
3321 struct pci_dev *pcidev = card->pcidev;
3322 unsigned long tmpl, modl;
3323 unsigned int linkrate, rsvdcr;
3324 unsigned int tst_entries;
3325 struct net_device *tmp;
3326 char tname[10];
3327
3328 u32 size;
3329 u_char pci_byte;
3330 u32 conf;
3331 int i, k;
3332
3333 if (test_bit(IDT77252_BIT_INIT, &card->flags)) {
3334 printk("Error: SAR already initialized.\n");
3335 return -1;
3336 }
3337
3338 /*****************************************************************/
3339 /* P C I C O N F I G U R A T I O N */
3340 /*****************************************************************/
3341
3342 /* Set PCI Retry-Timeout and TRDY timeout */
3343 IPRINTK("%s: Checking PCI retries.\n", card->name);
3344 if (pci_read_config_byte(pcidev, 0x40, &pci_byte) != 0) {
3345 printk("%s: can't read PCI retry timeout.\n", card->name);
3346 deinit_card(card);
3347 return -1;
3348 }
3349 if (pci_byte != 0) {
3350 IPRINTK("%s: PCI retry timeout: %d, set to 0.\n",
3351 card->name, pci_byte);
3352 if (pci_write_config_byte(pcidev, 0x40, 0) != 0) {
3353 printk("%s: can't set PCI retry timeout.\n",
3354 card->name);
3355 deinit_card(card);
3356 return -1;
3357 }
3358 }
3359 IPRINTK("%s: Checking PCI TRDY.\n", card->name);
3360 if (pci_read_config_byte(pcidev, 0x41, &pci_byte) != 0) {
3361 printk("%s: can't read PCI TRDY timeout.\n", card->name);
3362 deinit_card(card);
3363 return -1;
3364 }
3365 if (pci_byte != 0) {
3366 IPRINTK("%s: PCI TRDY timeout: %d, set to 0.\n",
3367 card->name, pci_byte);
3368 if (pci_write_config_byte(pcidev, 0x41, 0) != 0) {
3369 printk("%s: can't set PCI TRDY timeout.\n", card->name);
3370 deinit_card(card);
3371 return -1;
3372 }
3373 }
3374 /* Reset Timer register */
3375 if (readl(SAR_REG_STAT) & SAR_STAT_TMROF) {
3376 printk("%s: resetting timer overflow.\n", card->name);
3377 writel(SAR_STAT_TMROF, SAR_REG_STAT);
3378 }
3379 IPRINTK("%s: Request IRQ ... ", card->name);
3380 if (request_irq(pcidev->irq, idt77252_interrupt, IRQF_DISABLED|IRQF_SHARED,
3381 card->name, card) != 0) {
3382 printk("%s: can't allocate IRQ.\n", card->name);
3383 deinit_card(card);
3384 return -1;
3385 }
3386 IPRINTK("got %d.\n", pcidev->irq);
3387
3388 /*****************************************************************/
3389 /* C H E C K A N D I N I T S R A M */
3390 /*****************************************************************/
3391
3392 IPRINTK("%s: Initializing SRAM\n", card->name);
3393
3394 /* preset size of connecton table, so that init_sram() knows about it */
3395 conf = SAR_CFG_TX_FIFO_SIZE_9 | /* Use maximum fifo size */
3396 SAR_CFG_RXSTQ_SIZE_8k | /* Receive Status Queue is 8k */
3397 SAR_CFG_IDLE_CLP | /* Set CLP on idle cells */
3398 #ifndef ATM_IDT77252_SEND_IDLE
3399 SAR_CFG_NO_IDLE | /* Do not send idle cells */
3400 #endif
3401 0;
3402
3403 if (card->sramsize == (512 * 1024))
3404 conf |= SAR_CFG_CNTBL_1k;
3405 else
3406 conf |= SAR_CFG_CNTBL_512;
3407
3408 switch (vpibits) {
3409 case 0:
3410 conf |= SAR_CFG_VPVCS_0;
3411 break;
3412 default:
3413 case 1:
3414 conf |= SAR_CFG_VPVCS_1;
3415 break;
3416 case 2:
3417 conf |= SAR_CFG_VPVCS_2;
3418 break;
3419 case 8:
3420 conf |= SAR_CFG_VPVCS_8;
3421 break;
3422 }
3423
3424 writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG);
3425
3426 if (init_sram(card) < 0)
3427 return -1;
3428
3429 /********************************************************************/
3430 /* 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 */
3431 /********************************************************************/
3432 /* Initialize TSQ */
3433 if (0 != init_tsq(card)) {
3434 deinit_card(card);
3435 return -1;
3436 }
3437 /* Initialize RSQ */
3438 if (0 != init_rsq(card)) {
3439 deinit_card(card);
3440 return -1;
3441 }
3442
3443 card->vpibits = vpibits;
3444 if (card->sramsize == (512 * 1024)) {
3445 card->vcibits = 10 - card->vpibits;
3446 } else {
3447 card->vcibits = 9 - card->vpibits;
3448 }
3449
3450 card->vcimask = 0;
3451 for (k = 0, i = 1; k < card->vcibits; k++) {
3452 card->vcimask |= i;
3453 i <<= 1;
3454 }
3455
3456 IPRINTK("%s: Setting VPI/VCI mask to zero.\n", card->name);
3457 writel(0, SAR_REG_VPM);
3458
3459 /* Little Endian Order */
3460 writel(0, SAR_REG_GP);
3461
3462 /* Initialize RAW Cell Handle Register */
3463 card->raw_cell_hnd = pci_alloc_consistent(card->pcidev, 2 * sizeof(u32),
3464 &card->raw_cell_paddr);
3465 if (!card->raw_cell_hnd) {
3466 printk("%s: memory allocation failure.\n", card->name);
3467 deinit_card(card);
3468 return -1;
3469 }
3470 memset(card->raw_cell_hnd, 0, 2 * sizeof(u32));
3471 writel(card->raw_cell_paddr, SAR_REG_RAWHND);
3472 IPRINTK("%s: raw cell handle is at 0x%p.\n", card->name,
3473 card->raw_cell_hnd);
3474
3475 size = sizeof(struct vc_map *) * card->tct_size;
3476 IPRINTK("%s: allocate %d byte for VC map.\n", card->name, size);
3477 if (NULL == (card->vcs = vmalloc(size))) {
3478 printk("%s: memory allocation failure.\n", card->name);
3479 deinit_card(card);
3480 return -1;
3481 }
3482 memset(card->vcs, 0, size);
3483
3484 size = sizeof(struct vc_map *) * card->scd_size;
3485 IPRINTK("%s: allocate %d byte for SCD to VC mapping.\n",
3486 card->name, size);
3487 if (NULL == (card->scd2vc = vmalloc(size))) {
3488 printk("%s: memory allocation failure.\n", card->name);
3489 deinit_card(card);
3490 return -1;
3491 }
3492 memset(card->scd2vc, 0, size);
3493
3494 size = sizeof(struct tst_info) * (card->tst_size - 2);
3495 IPRINTK("%s: allocate %d byte for TST to VC mapping.\n",
3496 card->name, size);
3497 if (NULL == (card->soft_tst = vmalloc(size))) {
3498 printk("%s: memory allocation failure.\n", card->name);
3499 deinit_card(card);
3500 return -1;
3501 }
3502 for (i = 0; i < card->tst_size - 2; i++) {
3503 card->soft_tst[i].tste = TSTE_OPC_VAR;
3504 card->soft_tst[i].vc = NULL;
3505 }
3506
3507 if (dev->phy == NULL) {
3508 printk("%s: No LT device defined.\n", card->name);
3509 deinit_card(card);
3510 return -1;
3511 }
3512 if (dev->phy->ioctl == NULL) {
3513 printk("%s: LT had no IOCTL funtion defined.\n", card->name);
3514 deinit_card(card);
3515 return -1;
3516 }
3517
3518 #ifdef CONFIG_ATM_IDT77252_USE_SUNI
3519 /*
3520 * this is a jhs hack to get around special functionality in the
3521 * phy driver for the atecom hardware; the functionality doesn't
3522 * exist in the linux atm suni driver
3523 *
3524 * it isn't the right way to do things, but as the guy from NIST
3525 * said, talking about their measurement of the fine structure
3526 * constant, "it's good enough for government work."
3527 */
3528 linkrate = 149760000;
3529 #endif
3530
3531 card->link_pcr = (linkrate / 8 / 53);
3532 printk("%s: Linkrate on ATM line : %u bit/s, %u cell/s.\n",
3533 card->name, linkrate, card->link_pcr);
3534
3535 #ifdef ATM_IDT77252_SEND_IDLE
3536 card->utopia_pcr = card->link_pcr;
3537 #else
3538 card->utopia_pcr = (160000000 / 8 / 54);
3539 #endif
3540
3541 rsvdcr = 0;
3542 if (card->utopia_pcr > card->link_pcr)
3543 rsvdcr = card->utopia_pcr - card->link_pcr;
3544
3545 tmpl = (unsigned long) rsvdcr * ((unsigned long) card->tst_size - 2);
3546 modl = tmpl % (unsigned long)card->utopia_pcr;
3547 tst_entries = (int) (tmpl / (unsigned long)card->utopia_pcr);
3548 if (modl)
3549 tst_entries++;
3550 card->tst_free -= tst_entries;
3551 fill_tst(card, NULL, tst_entries, TSTE_OPC_NULL);
3552
3553 #ifdef HAVE_EEPROM
3554 idt77252_eeprom_init(card);
3555 printk("%s: EEPROM: %02x:", card->name,
3556 idt77252_eeprom_read_status(card));
3557
3558 for (i = 0; i < 0x80; i++) {
3559 printk(" %02x",
3560 idt77252_eeprom_read_byte(card, i)
3561 );
3562 }
3563 printk("\n");
3564 #endif /* HAVE_EEPROM */
3565
3566 /*
3567 * XXX: <hack>
3568 */
3569 sprintf(tname, "eth%d", card->index);
3570 tmp = dev_get_by_name(&init_net, tname); /* jhs: was "tmp = dev_get(tname);" */
3571 if (tmp) {
3572 memcpy(card->atmdev->esi, tmp->dev_addr, 6);
3573
3574 printk("%s: ESI %02x:%02x:%02x:%02x:%02x:%02x\n",
3575 card->name, card->atmdev->esi[0], card->atmdev->esi[1],
3576 card->atmdev->esi[2], card->atmdev->esi[3],
3577 card->atmdev->esi[4], card->atmdev->esi[5]);
3578 }
3579 /*
3580 * XXX: </hack>
3581 */
3582
3583 /* Set Maximum Deficit Count for now. */
3584 writel(0xffff, SAR_REG_MDFCT);
3585
3586 set_bit(IDT77252_BIT_INIT, &card->flags);
3587
3588 XPRINTK("%s: IDT77252 ABR SAR initialization complete.\n", card->name);
3589 return 0;
3590 }
3591
3592
3593 /*****************************************************************************/
3594 /* */
3595 /* Probing of IDT77252 ABR SAR */
3596 /* */
3597 /*****************************************************************************/
3598
3599
3600 static int __devinit
3601 idt77252_preset(struct idt77252_dev *card)
3602 {
3603 u16 pci_command;
3604
3605 /*****************************************************************/
3606 /* P C I C O N F I G U R A T I O N */
3607 /*****************************************************************/
3608
3609 XPRINTK("%s: Enable PCI master and memory access for SAR.\n",
3610 card->name);
3611 if (pci_read_config_word(card->pcidev, PCI_COMMAND, &pci_command)) {
3612 printk("%s: can't read PCI_COMMAND.\n", card->name);
3613 deinit_card(card);
3614 return -1;
3615 }
3616 if (!(pci_command & PCI_COMMAND_IO)) {
3617 printk("%s: PCI_COMMAND: %04x (???)\n",
3618 card->name, pci_command);
3619 deinit_card(card);
3620 return (-1);
3621 }
3622 pci_command |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
3623 if (pci_write_config_word(card->pcidev, PCI_COMMAND, pci_command)) {
3624 printk("%s: can't write PCI_COMMAND.\n", card->name);
3625 deinit_card(card);
3626 return -1;
3627 }
3628 /*****************************************************************/
3629 /* G E N E R I C R E S E T */
3630 /*****************************************************************/
3631
3632 /* Software reset */
3633 writel(SAR_CFG_SWRST, SAR_REG_CFG);
3634 mdelay(1);
3635 writel(0, SAR_REG_CFG);
3636
3637 IPRINTK("%s: Software resetted.\n", card->name);
3638 return 0;
3639 }
3640
3641
3642 static unsigned long __devinit
3643 probe_sram(struct idt77252_dev *card)
3644 {
3645 u32 data, addr;
3646
3647 writel(0, SAR_REG_DR0);
3648 writel(SAR_CMD_WRITE_SRAM | (0 << 2), SAR_REG_CMD);
3649
3650 for (addr = 0x4000; addr < 0x80000; addr += 0x4000) {
3651 writel(ATM_POISON, SAR_REG_DR0);
3652 writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD);
3653
3654 writel(SAR_CMD_READ_SRAM | (0 << 2), SAR_REG_CMD);
3655 data = readl(SAR_REG_DR0);
3656
3657 if (data != 0)
3658 break;
3659 }
3660
3661 return addr * sizeof(u32);
3662 }
3663
3664 static int __devinit
3665 idt77252_init_one(struct pci_dev *pcidev, const struct pci_device_id *id)
3666 {
3667 static struct idt77252_dev **last = &idt77252_chain;
3668 static int index = 0;
3669
3670 unsigned long membase, srambase;
3671 struct idt77252_dev *card;
3672 struct atm_dev *dev;
3673 int i, err;
3674
3675
3676 if ((err = pci_enable_device(pcidev))) {
3677 printk("idt77252: can't enable PCI device at %s\n", pci_name(pcidev));
3678 return err;
3679 }
3680
3681 card = kzalloc(sizeof(struct idt77252_dev), GFP_KERNEL);
3682 if (!card) {
3683 printk("idt77252-%d: can't allocate private data\n", index);
3684 err = -ENOMEM;
3685 goto err_out_disable_pdev;
3686 }
3687 card->revision = pcidev->revision;
3688 card->index = index;
3689 card->pcidev = pcidev;
3690 sprintf(card->name, "idt77252-%d", card->index);
3691
3692 INIT_WORK(&card->tqueue, idt77252_softint);
3693
3694 membase = pci_resource_start(pcidev, 1);
3695 srambase = pci_resource_start(pcidev, 2);
3696
3697 mutex_init(&card->mutex);
3698 spin_lock_init(&card->cmd_lock);
3699 spin_lock_init(&card->tst_lock);
3700
3701 init_timer(&card->tst_timer);
3702 card->tst_timer.data = (unsigned long)card;
3703 card->tst_timer.function = tst_timer;
3704
3705 /* Do the I/O remapping... */
3706 card->membase = ioremap(membase, 1024);
3707 if (!card->membase) {
3708 printk("%s: can't ioremap() membase\n", card->name);
3709 err = -EIO;
3710 goto err_out_free_card;
3711 }
3712
3713 if (idt77252_preset(card)) {
3714 printk("%s: preset failed\n", card->name);
3715 err = -EIO;
3716 goto err_out_iounmap;
3717 }
3718
3719 dev = atm_dev_register("idt77252", &idt77252_ops, -1, NULL);
3720 if (!dev) {
3721 printk("%s: can't register atm device\n", card->name);
3722 err = -EIO;
3723 goto err_out_iounmap;
3724 }
3725 dev->dev_data = card;
3726 card->atmdev = dev;
3727
3728 #ifdef CONFIG_ATM_IDT77252_USE_SUNI
3729 suni_init(dev);
3730 if (!dev->phy) {
3731 printk("%s: can't init SUNI\n", card->name);
3732 err = -EIO;
3733 goto err_out_deinit_card;
3734 }
3735 #endif /* CONFIG_ATM_IDT77252_USE_SUNI */
3736
3737 card->sramsize = probe_sram(card);
3738
3739 for (i = 0; i < 4; i++) {
3740 card->fbq[i] = ioremap(srambase | 0x200000 | (i << 18), 4);
3741 if (!card->fbq[i]) {
3742 printk("%s: can't ioremap() FBQ%d\n", card->name, i);
3743 err = -EIO;
3744 goto err_out_deinit_card;
3745 }
3746 }
3747
3748 printk("%s: ABR SAR (Rev %c): MEM %08lx SRAM %08lx [%u KB]\n",
3749 card->name, ((card->revision > 1) && (card->revision < 25)) ?
3750 'A' + card->revision - 1 : '?', membase, srambase,
3751 card->sramsize / 1024);
3752
3753 if (init_card(dev)) {
3754 printk("%s: init_card failed\n", card->name);
3755 err = -EIO;
3756 goto err_out_deinit_card;
3757 }
3758
3759 dev->ci_range.vpi_bits = card->vpibits;
3760 dev->ci_range.vci_bits = card->vcibits;
3761 dev->link_rate = card->link_pcr;
3762
3763 if (dev->phy->start)
3764 dev->phy->start(dev);
3765
3766 if (idt77252_dev_open(card)) {
3767 printk("%s: dev_open failed\n", card->name);
3768 err = -EIO;
3769 goto err_out_stop;
3770 }
3771
3772 *last = card;
3773 last = &card->next;
3774 index++;
3775
3776 return 0;
3777
3778 err_out_stop:
3779 if (dev->phy->stop)
3780 dev->phy->stop(dev);
3781
3782 err_out_deinit_card:
3783 deinit_card(card);
3784
3785 err_out_iounmap:
3786 iounmap(card->membase);
3787
3788 err_out_free_card:
3789 kfree(card);
3790
3791 err_out_disable_pdev:
3792 pci_disable_device(pcidev);
3793 return err;
3794 }
3795
3796 static struct pci_device_id idt77252_pci_tbl[] =
3797 {
3798 { PCI_VENDOR_ID_IDT, PCI_DEVICE_ID_IDT_IDT77252,
3799 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
3800 { 0, }
3801 };
3802
3803 MODULE_DEVICE_TABLE(pci, idt77252_pci_tbl);
3804
3805 static struct pci_driver idt77252_driver = {
3806 .name = "idt77252",
3807 .id_table = idt77252_pci_tbl,
3808 .probe = idt77252_init_one,
3809 };
3810
3811 static int __init idt77252_init(void)
3812 {
3813 struct sk_buff *skb;
3814
3815 printk("%s: at %p\n", __func__, idt77252_init);
3816
3817 if (sizeof(skb->cb) < sizeof(struct atm_skb_data) +
3818 sizeof(struct idt77252_skb_prv)) {
3819 printk(KERN_ERR "%s: skb->cb is too small (%lu < %lu)\n",
3820 __func__, (unsigned long) sizeof(skb->cb),
3821 (unsigned long) sizeof(struct atm_skb_data) +
3822 sizeof(struct idt77252_skb_prv));
3823 return -EIO;
3824 }
3825
3826 return pci_register_driver(&idt77252_driver);
3827 }
3828
3829 static void __exit idt77252_exit(void)
3830 {
3831 struct idt77252_dev *card;
3832 struct atm_dev *dev;
3833
3834 pci_unregister_driver(&idt77252_driver);
3835
3836 while (idt77252_chain) {
3837 card = idt77252_chain;
3838 dev = card->atmdev;
3839 idt77252_chain = card->next;
3840
3841 if (dev->phy->stop)
3842 dev->phy->stop(dev);
3843 deinit_card(card);
3844 pci_disable_device(card->pcidev);
3845 kfree(card);
3846 }
3847
3848 DIPRINTK("idt77252: finished cleanup-module().\n");
3849 }
3850
3851 module_init(idt77252_init);
3852 module_exit(idt77252_exit);
3853
3854 MODULE_LICENSE("GPL");
3855
3856 module_param(vpibits, uint, 0);
3857 MODULE_PARM_DESC(vpibits, "number of VPI bits supported (0, 1, or 2)");
3858 #ifdef CONFIG_ATM_IDT77252_DEBUG
3859 module_param(debug, ulong, 0644);
3860 MODULE_PARM_DESC(debug, "debug bitmap, see drivers/atm/idt77252.h");
3861 #endif
3862
3863 MODULE_AUTHOR("Eddie C. Dost <ecd@atecom.com>");
3864 MODULE_DESCRIPTION("IDT77252 ABR SAR Driver");
Support for the Chinese Samsung S3C2440 based development boards