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Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / atm / idt77252.c
1 /*******************************************************************
2 * ident "$Id: idt77252.c,v 1.2 2001/11/11 08:13:54 ecd Exp $"
3 *
4 * $Author: ecd $
5 * $Date: 2001/11/11 08:13:54 $
6 *
7 * Copyright (c) 2000 ATecoM GmbH
8 *
9 * The author may be reached at ecd@atecom.com.
10 *
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the
13 * Free Software Foundation; either version 2 of the License, or (at your
14 * option) any later version.
15 *
16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
19 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
22 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
23 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 *
27 * You should have received a copy of the GNU General Public License along
28 * with this program; if not, write to the Free Software Foundation, Inc.,
29 * 675 Mass Ave, Cambridge, MA 02139, USA.
30 *
31 *******************************************************************/
32 static char const rcsid[] =
33 "$Id: idt77252.c,v 1.2 2001/11/11 08:13:54 ecd Exp $";
34
35
36 #include <linux/module.h>
37 #include <linux/pci.h>
38 #include <linux/poison.h>
39 #include <linux/skbuff.h>
40 #include <linux/kernel.h>
41 #include <linux/vmalloc.h>
42 #include <linux/netdevice.h>
43 #include <linux/atmdev.h>
44 #include <linux/atm.h>
45 #include <linux/delay.h>
46 #include <linux/init.h>
47 #include <linux/bitops.h>
48 #include <linux/wait.h>
49 #include <linux/jiffies.h>
50 #include <asm/semaphore.h>
51 #include <asm/io.h>
52 #include <asm/uaccess.h>
53 #include <asm/atomic.h>
54 #include <asm/byteorder.h>
55
56 #ifdef CONFIG_ATM_IDT77252_USE_SUNI
57 #include "suni.h"
58 #endif /* CONFIG_ATM_IDT77252_USE_SUNI */
59
60
61 #include "idt77252.h"
62 #include "idt77252_tables.h"
63
64 static unsigned int vpibits = 1;
65
66
67 #define CONFIG_ATM_IDT77252_SEND_IDLE 1
68
69
70 /*
71 * Debug HACKs.
72 */
73 #define DEBUG_MODULE 1
74 #undef HAVE_EEPROM /* does not work, yet. */
75
76 #ifdef CONFIG_ATM_IDT77252_DEBUG
77 static unsigned long debug = DBG_GENERAL;
78 #endif
79
80
81 #define SAR_RX_DELAY (SAR_CFG_RXINT_NODELAY)
82
83
84 /*
85 * SCQ Handling.
86 */
87 static struct scq_info *alloc_scq(struct idt77252_dev *, int);
88 static void free_scq(struct idt77252_dev *, struct scq_info *);
89 static int queue_skb(struct idt77252_dev *, struct vc_map *,
90 struct sk_buff *, int oam);
91 static void drain_scq(struct idt77252_dev *, struct vc_map *);
92 static unsigned long get_free_scd(struct idt77252_dev *, struct vc_map *);
93 static void fill_scd(struct idt77252_dev *, struct scq_info *, int);
94
95 /*
96 * FBQ Handling.
97 */
98 static int push_rx_skb(struct idt77252_dev *,
99 struct sk_buff *, int queue);
100 static void recycle_rx_skb(struct idt77252_dev *, struct sk_buff *);
101 static void flush_rx_pool(struct idt77252_dev *, struct rx_pool *);
102 static void recycle_rx_pool_skb(struct idt77252_dev *,
103 struct rx_pool *);
104 static void add_rx_skb(struct idt77252_dev *, int queue,
105 unsigned int size, unsigned int count);
106
107 /*
108 * RSQ Handling.
109 */
110 static int init_rsq(struct idt77252_dev *);
111 static void deinit_rsq(struct idt77252_dev *);
112 static void idt77252_rx(struct idt77252_dev *);
113
114 /*
115 * TSQ handling.
116 */
117 static int init_tsq(struct idt77252_dev *);
118 static void deinit_tsq(struct idt77252_dev *);
119 static void idt77252_tx(struct idt77252_dev *);
120
121
122 /*
123 * ATM Interface.
124 */
125 static void idt77252_dev_close(struct atm_dev *dev);
126 static int idt77252_open(struct atm_vcc *vcc);
127 static void idt77252_close(struct atm_vcc *vcc);
128 static int idt77252_send(struct atm_vcc *vcc, struct sk_buff *skb);
129 static int idt77252_send_oam(struct atm_vcc *vcc, void *cell,
130 int flags);
131 static void idt77252_phy_put(struct atm_dev *dev, unsigned char value,
132 unsigned long addr);
133 static unsigned char idt77252_phy_get(struct atm_dev *dev, unsigned long addr);
134 static int idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos,
135 int flags);
136 static int idt77252_proc_read(struct atm_dev *dev, loff_t * pos,
137 char *page);
138 static void idt77252_softint(struct work_struct *work);
139
140
141 static struct atmdev_ops idt77252_ops =
142 {
143 .dev_close = idt77252_dev_close,
144 .open = idt77252_open,
145 .close = idt77252_close,
146 .send = idt77252_send,
147 .send_oam = idt77252_send_oam,
148 .phy_put = idt77252_phy_put,
149 .phy_get = idt77252_phy_get,
150 .change_qos = idt77252_change_qos,
151 .proc_read = idt77252_proc_read,
152 .owner = THIS_MODULE
153 };
154
155 static struct idt77252_dev *idt77252_chain = NULL;
156 static unsigned int idt77252_sram_write_errors = 0;
157
158 /*****************************************************************************/
159 /* */
160 /* I/O and Utility Bus */
161 /* */
162 /*****************************************************************************/
163
164 static void
165 waitfor_idle(struct idt77252_dev *card)
166 {
167 u32 stat;
168
169 stat = readl(SAR_REG_STAT);
170 while (stat & SAR_STAT_CMDBZ)
171 stat = readl(SAR_REG_STAT);
172 }
173
174 static u32
175 read_sram(struct idt77252_dev *card, unsigned long addr)
176 {
177 unsigned long flags;
178 u32 value;
179
180 spin_lock_irqsave(&card->cmd_lock, flags);
181 writel(SAR_CMD_READ_SRAM | (addr << 2), SAR_REG_CMD);
182 waitfor_idle(card);
183 value = readl(SAR_REG_DR0);
184 spin_unlock_irqrestore(&card->cmd_lock, flags);
185 return value;
186 }
187
188 static void
189 write_sram(struct idt77252_dev *card, unsigned long addr, u32 value)
190 {
191 unsigned long flags;
192
193 if ((idt77252_sram_write_errors == 0) &&
194 (((addr > card->tst[0] + card->tst_size - 2) &&
195 (addr < card->tst[0] + card->tst_size)) ||
196 ((addr > card->tst[1] + card->tst_size - 2) &&
197 (addr < card->tst[1] + card->tst_size)))) {
198 printk("%s: ERROR: TST JMP section at %08lx written: %08x\n",
199 card->name, addr, value);
200 }
201
202 spin_lock_irqsave(&card->cmd_lock, flags);
203 writel(value, SAR_REG_DR0);
204 writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD);
205 waitfor_idle(card);
206 spin_unlock_irqrestore(&card->cmd_lock, flags);
207 }
208
209 static u8
210 read_utility(void *dev, unsigned long ubus_addr)
211 {
212 struct idt77252_dev *card = dev;
213 unsigned long flags;
214 u8 value;
215
216 if (!card) {
217 printk("Error: No such device.\n");
218 return -1;
219 }
220
221 spin_lock_irqsave(&card->cmd_lock, flags);
222 writel(SAR_CMD_READ_UTILITY + ubus_addr, SAR_REG_CMD);
223 waitfor_idle(card);
224 value = readl(SAR_REG_DR0);
225 spin_unlock_irqrestore(&card->cmd_lock, flags);
226 return value;
227 }
228
229 static void
230 write_utility(void *dev, unsigned long ubus_addr, u8 value)
231 {
232 struct idt77252_dev *card = dev;
233 unsigned long flags;
234
235 if (!card) {
236 printk("Error: No such device.\n");
237 return;
238 }
239
240 spin_lock_irqsave(&card->cmd_lock, flags);
241 writel((u32) value, SAR_REG_DR0);
242 writel(SAR_CMD_WRITE_UTILITY + ubus_addr, SAR_REG_CMD);
243 waitfor_idle(card);
244 spin_unlock_irqrestore(&card->cmd_lock, flags);
245 }
246
247 #ifdef HAVE_EEPROM
248 static u32 rdsrtab[] =
249 {
250 SAR_GP_EECS | SAR_GP_EESCLK,
251 0,
252 SAR_GP_EESCLK, /* 0 */
253 0,
254 SAR_GP_EESCLK, /* 0 */
255 0,
256 SAR_GP_EESCLK, /* 0 */
257 0,
258 SAR_GP_EESCLK, /* 0 */
259 0,
260 SAR_GP_EESCLK, /* 0 */
261 SAR_GP_EEDO,
262 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
263 0,
264 SAR_GP_EESCLK, /* 0 */
265 SAR_GP_EEDO,
266 SAR_GP_EESCLK | SAR_GP_EEDO /* 1 */
267 };
268
269 static u32 wrentab[] =
270 {
271 SAR_GP_EECS | SAR_GP_EESCLK,
272 0,
273 SAR_GP_EESCLK, /* 0 */
274 0,
275 SAR_GP_EESCLK, /* 0 */
276 0,
277 SAR_GP_EESCLK, /* 0 */
278 0,
279 SAR_GP_EESCLK, /* 0 */
280 SAR_GP_EEDO,
281 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
282 SAR_GP_EEDO,
283 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
284 0,
285 SAR_GP_EESCLK, /* 0 */
286 0,
287 SAR_GP_EESCLK /* 0 */
288 };
289
290 static u32 rdtab[] =
291 {
292 SAR_GP_EECS | SAR_GP_EESCLK,
293 0,
294 SAR_GP_EESCLK, /* 0 */
295 0,
296 SAR_GP_EESCLK, /* 0 */
297 0,
298 SAR_GP_EESCLK, /* 0 */
299 0,
300 SAR_GP_EESCLK, /* 0 */
301 0,
302 SAR_GP_EESCLK, /* 0 */
303 0,
304 SAR_GP_EESCLK, /* 0 */
305 SAR_GP_EEDO,
306 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
307 SAR_GP_EEDO,
308 SAR_GP_EESCLK | SAR_GP_EEDO /* 1 */
309 };
310
311 static u32 wrtab[] =
312 {
313 SAR_GP_EECS | SAR_GP_EESCLK,
314 0,
315 SAR_GP_EESCLK, /* 0 */
316 0,
317 SAR_GP_EESCLK, /* 0 */
318 0,
319 SAR_GP_EESCLK, /* 0 */
320 0,
321 SAR_GP_EESCLK, /* 0 */
322 0,
323 SAR_GP_EESCLK, /* 0 */
324 0,
325 SAR_GP_EESCLK, /* 0 */
326 SAR_GP_EEDO,
327 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
328 0,
329 SAR_GP_EESCLK /* 0 */
330 };
331
332 static u32 clktab[] =
333 {
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 SAR_GP_EESCLK,
346 0,
347 SAR_GP_EESCLK,
348 0,
349 SAR_GP_EESCLK,
350 0
351 };
352
353 static u32
354 idt77252_read_gp(struct idt77252_dev *card)
355 {
356 u32 gp;
357
358 gp = readl(SAR_REG_GP);
359 #if 0
360 printk("RD: %s\n", gp & SAR_GP_EEDI ? "1" : "0");
361 #endif
362 return gp;
363 }
364
365 static void
366 idt77252_write_gp(struct idt77252_dev *card, u32 value)
367 {
368 unsigned long flags;
369
370 #if 0
371 printk("WR: %s %s %s\n", value & SAR_GP_EECS ? " " : "/CS",
372 value & SAR_GP_EESCLK ? "HIGH" : "LOW ",
373 value & SAR_GP_EEDO ? "1" : "0");
374 #endif
375
376 spin_lock_irqsave(&card->cmd_lock, flags);
377 waitfor_idle(card);
378 writel(value, SAR_REG_GP);
379 spin_unlock_irqrestore(&card->cmd_lock, flags);
380 }
381
382 static u8
383 idt77252_eeprom_read_status(struct idt77252_dev *card)
384 {
385 u8 byte;
386 u32 gp;
387 int i, j;
388
389 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
390
391 for (i = 0; i < ARRAY_SIZE(rdsrtab); i++) {
392 idt77252_write_gp(card, gp | rdsrtab[i]);
393 udelay(5);
394 }
395 idt77252_write_gp(card, gp | SAR_GP_EECS);
396 udelay(5);
397
398 byte = 0;
399 for (i = 0, j = 0; i < 8; i++) {
400 byte <<= 1;
401
402 idt77252_write_gp(card, gp | clktab[j++]);
403 udelay(5);
404
405 byte |= idt77252_read_gp(card) & SAR_GP_EEDI ? 1 : 0;
406
407 idt77252_write_gp(card, gp | clktab[j++]);
408 udelay(5);
409 }
410 idt77252_write_gp(card, gp | SAR_GP_EECS);
411 udelay(5);
412
413 return byte;
414 }
415
416 static u8
417 idt77252_eeprom_read_byte(struct idt77252_dev *card, u8 offset)
418 {
419 u8 byte;
420 u32 gp;
421 int i, j;
422
423 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
424
425 for (i = 0; i < ARRAY_SIZE(rdtab); i++) {
426 idt77252_write_gp(card, gp | rdtab[i]);
427 udelay(5);
428 }
429 idt77252_write_gp(card, gp | SAR_GP_EECS);
430 udelay(5);
431
432 for (i = 0, j = 0; i < 8; i++) {
433 idt77252_write_gp(card, gp | clktab[j++] |
434 (offset & 1 ? SAR_GP_EEDO : 0));
435 udelay(5);
436
437 idt77252_write_gp(card, gp | clktab[j++] |
438 (offset & 1 ? SAR_GP_EEDO : 0));
439 udelay(5);
440
441 offset >>= 1;
442 }
443 idt77252_write_gp(card, gp | SAR_GP_EECS);
444 udelay(5);
445
446 byte = 0;
447 for (i = 0, j = 0; i < 8; i++) {
448 byte <<= 1;
449
450 idt77252_write_gp(card, gp | clktab[j++]);
451 udelay(5);
452
453 byte |= idt77252_read_gp(card) & SAR_GP_EEDI ? 1 : 0;
454
455 idt77252_write_gp(card, gp | clktab[j++]);
456 udelay(5);
457 }
458 idt77252_write_gp(card, gp | SAR_GP_EECS);
459 udelay(5);
460
461 return byte;
462 }
463
464 static void
465 idt77252_eeprom_write_byte(struct idt77252_dev *card, u8 offset, u8 data)
466 {
467 u32 gp;
468 int i, j;
469
470 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
471
472 for (i = 0; i < ARRAY_SIZE(wrentab); i++) {
473 idt77252_write_gp(card, gp | wrentab[i]);
474 udelay(5);
475 }
476 idt77252_write_gp(card, gp | SAR_GP_EECS);
477 udelay(5);
478
479 for (i = 0; i < ARRAY_SIZE(wrtab); i++) {
480 idt77252_write_gp(card, gp | wrtab[i]);
481 udelay(5);
482 }
483 idt77252_write_gp(card, gp | SAR_GP_EECS);
484 udelay(5);
485
486 for (i = 0, j = 0; i < 8; i++) {
487 idt77252_write_gp(card, gp | clktab[j++] |
488 (offset & 1 ? SAR_GP_EEDO : 0));
489 udelay(5);
490
491 idt77252_write_gp(card, gp | clktab[j++] |
492 (offset & 1 ? SAR_GP_EEDO : 0));
493 udelay(5);
494
495 offset >>= 1;
496 }
497 idt77252_write_gp(card, gp | SAR_GP_EECS);
498 udelay(5);
499
500 for (i = 0, j = 0; i < 8; i++) {
501 idt77252_write_gp(card, gp | clktab[j++] |
502 (data & 1 ? SAR_GP_EEDO : 0));
503 udelay(5);
504
505 idt77252_write_gp(card, gp | clktab[j++] |
506 (data & 1 ? SAR_GP_EEDO : 0));
507 udelay(5);
508
509 data >>= 1;
510 }
511 idt77252_write_gp(card, gp | SAR_GP_EECS);
512 udelay(5);
513 }
514
515 static void
516 idt77252_eeprom_init(struct idt77252_dev *card)
517 {
518 u32 gp;
519
520 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
521
522 idt77252_write_gp(card, gp | SAR_GP_EECS | SAR_GP_EESCLK);
523 udelay(5);
524 idt77252_write_gp(card, gp | SAR_GP_EECS);
525 udelay(5);
526 idt77252_write_gp(card, gp | SAR_GP_EECS | SAR_GP_EESCLK);
527 udelay(5);
528 idt77252_write_gp(card, gp | SAR_GP_EECS);
529 udelay(5);
530 }
531 #endif /* HAVE_EEPROM */
532
533
534 #ifdef CONFIG_ATM_IDT77252_DEBUG
535 static void
536 dump_tct(struct idt77252_dev *card, int index)
537 {
538 unsigned long tct;
539 int i;
540
541 tct = (unsigned long) (card->tct_base + index * SAR_SRAM_TCT_SIZE);
542
543 printk("%s: TCT %x:", card->name, index);
544 for (i = 0; i < 8; i++) {
545 printk(" %08x", read_sram(card, tct + i));
546 }
547 printk("\n");
548 }
549
550 static void
551 idt77252_tx_dump(struct idt77252_dev *card)
552 {
553 struct atm_vcc *vcc;
554 struct vc_map *vc;
555 int i;
556
557 printk("%s\n", __FUNCTION__);
558 for (i = 0; i < card->tct_size; i++) {
559 vc = card->vcs[i];
560 if (!vc)
561 continue;
562
563 vcc = NULL;
564 if (vc->rx_vcc)
565 vcc = vc->rx_vcc;
566 else if (vc->tx_vcc)
567 vcc = vc->tx_vcc;
568
569 if (!vcc)
570 continue;
571
572 printk("%s: Connection %d:\n", card->name, vc->index);
573 dump_tct(card, vc->index);
574 }
575 }
576 #endif
577
578
579 /*****************************************************************************/
580 /* */
581 /* SCQ Handling */
582 /* */
583 /*****************************************************************************/
584
585 static int
586 sb_pool_add(struct idt77252_dev *card, struct sk_buff *skb, int queue)
587 {
588 struct sb_pool *pool = &card->sbpool[queue];
589 int index;
590
591 index = pool->index;
592 while (pool->skb[index]) {
593 index = (index + 1) & FBQ_MASK;
594 if (index == pool->index)
595 return -ENOBUFS;
596 }
597
598 pool->skb[index] = skb;
599 IDT77252_PRV_POOL(skb) = POOL_HANDLE(queue, index);
600
601 pool->index = (index + 1) & FBQ_MASK;
602 return 0;
603 }
604
605 static void
606 sb_pool_remove(struct idt77252_dev *card, struct sk_buff *skb)
607 {
608 unsigned int queue, index;
609 u32 handle;
610
611 handle = IDT77252_PRV_POOL(skb);
612
613 queue = POOL_QUEUE(handle);
614 if (queue > 3)
615 return;
616
617 index = POOL_INDEX(handle);
618 if (index > FBQ_SIZE - 1)
619 return;
620
621 card->sbpool[queue].skb[index] = NULL;
622 }
623
624 static struct sk_buff *
625 sb_pool_skb(struct idt77252_dev *card, u32 handle)
626 {
627 unsigned int queue, index;
628
629 queue = POOL_QUEUE(handle);
630 if (queue > 3)
631 return NULL;
632
633 index = POOL_INDEX(handle);
634 if (index > FBQ_SIZE - 1)
635 return NULL;
636
637 return card->sbpool[queue].skb[index];
638 }
639
640 static struct scq_info *
641 alloc_scq(struct idt77252_dev *card, int class)
642 {
643 struct scq_info *scq;
644
645 scq = kzalloc(sizeof(struct scq_info), GFP_KERNEL);
646 if (!scq)
647 return NULL;
648 scq->base = pci_alloc_consistent(card->pcidev, SCQ_SIZE,
649 &scq->paddr);
650 if (scq->base == NULL) {
651 kfree(scq);
652 return NULL;
653 }
654 memset(scq->base, 0, SCQ_SIZE);
655
656 scq->next = scq->base;
657 scq->last = scq->base + (SCQ_ENTRIES - 1);
658 atomic_set(&scq->used, 0);
659
660 spin_lock_init(&scq->lock);
661 spin_lock_init(&scq->skblock);
662
663 skb_queue_head_init(&scq->transmit);
664 skb_queue_head_init(&scq->pending);
665
666 TXPRINTK("idt77252: SCQ: base 0x%p, next 0x%p, last 0x%p, paddr %08llx\n",
667 scq->base, scq->next, scq->last, (unsigned long long)scq->paddr);
668
669 return scq;
670 }
671
672 static void
673 free_scq(struct idt77252_dev *card, struct scq_info *scq)
674 {
675 struct sk_buff *skb;
676 struct atm_vcc *vcc;
677
678 pci_free_consistent(card->pcidev, SCQ_SIZE,
679 scq->base, scq->paddr);
680
681 while ((skb = skb_dequeue(&scq->transmit))) {
682 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
683 skb->len, PCI_DMA_TODEVICE);
684
685 vcc = ATM_SKB(skb)->vcc;
686 if (vcc->pop)
687 vcc->pop(vcc, skb);
688 else
689 dev_kfree_skb(skb);
690 }
691
692 while ((skb = skb_dequeue(&scq->pending))) {
693 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
694 skb->len, PCI_DMA_TODEVICE);
695
696 vcc = ATM_SKB(skb)->vcc;
697 if (vcc->pop)
698 vcc->pop(vcc, skb);
699 else
700 dev_kfree_skb(skb);
701 }
702
703 kfree(scq);
704 }
705
706
707 static int
708 push_on_scq(struct idt77252_dev *card, struct vc_map *vc, struct sk_buff *skb)
709 {
710 struct scq_info *scq = vc->scq;
711 unsigned long flags;
712 struct scqe *tbd;
713 int entries;
714
715 TXPRINTK("%s: SCQ: next 0x%p\n", card->name, scq->next);
716
717 atomic_inc(&scq->used);
718 entries = atomic_read(&scq->used);
719 if (entries > (SCQ_ENTRIES - 1)) {
720 atomic_dec(&scq->used);
721 goto out;
722 }
723
724 skb_queue_tail(&scq->transmit, skb);
725
726 spin_lock_irqsave(&vc->lock, flags);
727 if (vc->estimator) {
728 struct atm_vcc *vcc = vc->tx_vcc;
729 struct sock *sk = sk_atm(vcc);
730
731 vc->estimator->cells += (skb->len + 47) / 48;
732 if (atomic_read(&sk->sk_wmem_alloc) >
733 (sk->sk_sndbuf >> 1)) {
734 u32 cps = vc->estimator->maxcps;
735
736 vc->estimator->cps = cps;
737 vc->estimator->avcps = cps << 5;
738 if (vc->lacr < vc->init_er) {
739 vc->lacr = vc->init_er;
740 writel(TCMDQ_LACR | (vc->lacr << 16) |
741 vc->index, SAR_REG_TCMDQ);
742 }
743 }
744 }
745 spin_unlock_irqrestore(&vc->lock, flags);
746
747 tbd = &IDT77252_PRV_TBD(skb);
748
749 spin_lock_irqsave(&scq->lock, flags);
750 scq->next->word_1 = cpu_to_le32(tbd->word_1 |
751 SAR_TBD_TSIF | SAR_TBD_GTSI);
752 scq->next->word_2 = cpu_to_le32(tbd->word_2);
753 scq->next->word_3 = cpu_to_le32(tbd->word_3);
754 scq->next->word_4 = cpu_to_le32(tbd->word_4);
755
756 if (scq->next == scq->last)
757 scq->next = scq->base;
758 else
759 scq->next++;
760
761 write_sram(card, scq->scd,
762 scq->paddr +
763 (u32)((unsigned long)scq->next - (unsigned long)scq->base));
764 spin_unlock_irqrestore(&scq->lock, flags);
765
766 scq->trans_start = jiffies;
767
768 if (test_and_clear_bit(VCF_IDLE, &vc->flags)) {
769 writel(TCMDQ_START_LACR | (vc->lacr << 16) | vc->index,
770 SAR_REG_TCMDQ);
771 }
772
773 TXPRINTK("%d entries in SCQ used (push).\n", atomic_read(&scq->used));
774
775 XPRINTK("%s: SCQ (after push %2d) head = 0x%x, next = 0x%p.\n",
776 card->name, atomic_read(&scq->used),
777 read_sram(card, scq->scd + 1), scq->next);
778
779 return 0;
780
781 out:
782 if (time_after(jiffies, scq->trans_start + HZ)) {
783 printk("%s: Error pushing TBD for %d.%d\n",
784 card->name, vc->tx_vcc->vpi, vc->tx_vcc->vci);
785 #ifdef CONFIG_ATM_IDT77252_DEBUG
786 idt77252_tx_dump(card);
787 #endif
788 scq->trans_start = jiffies;
789 }
790
791 return -ENOBUFS;
792 }
793
794
795 static void
796 drain_scq(struct idt77252_dev *card, struct vc_map *vc)
797 {
798 struct scq_info *scq = vc->scq;
799 struct sk_buff *skb;
800 struct atm_vcc *vcc;
801
802 TXPRINTK("%s: SCQ (before drain %2d) next = 0x%p.\n",
803 card->name, atomic_read(&scq->used), scq->next);
804
805 skb = skb_dequeue(&scq->transmit);
806 if (skb) {
807 TXPRINTK("%s: freeing skb at %p.\n", card->name, skb);
808
809 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
810 skb->len, PCI_DMA_TODEVICE);
811
812 vcc = ATM_SKB(skb)->vcc;
813
814 if (vcc->pop)
815 vcc->pop(vcc, skb);
816 else
817 dev_kfree_skb(skb);
818
819 atomic_inc(&vcc->stats->tx);
820 }
821
822 atomic_dec(&scq->used);
823
824 spin_lock(&scq->skblock);
825 while ((skb = skb_dequeue(&scq->pending))) {
826 if (push_on_scq(card, vc, skb)) {
827 skb_queue_head(&vc->scq->pending, skb);
828 break;
829 }
830 }
831 spin_unlock(&scq->skblock);
832 }
833
834 static int
835 queue_skb(struct idt77252_dev *card, struct vc_map *vc,
836 struct sk_buff *skb, int oam)
837 {
838 struct atm_vcc *vcc;
839 struct scqe *tbd;
840 unsigned long flags;
841 int error;
842 int aal;
843
844 if (skb->len == 0) {
845 printk("%s: invalid skb->len (%d)\n", card->name, skb->len);
846 return -EINVAL;
847 }
848
849 TXPRINTK("%s: Sending %d bytes of data.\n",
850 card->name, skb->len);
851
852 tbd = &IDT77252_PRV_TBD(skb);
853 vcc = ATM_SKB(skb)->vcc;
854
855 IDT77252_PRV_PADDR(skb) = pci_map_single(card->pcidev, skb->data,
856 skb->len, PCI_DMA_TODEVICE);
857
858 error = -EINVAL;
859
860 if (oam) {
861 if (skb->len != 52)
862 goto errout;
863
864 tbd->word_1 = SAR_TBD_OAM | ATM_CELL_PAYLOAD | SAR_TBD_EPDU;
865 tbd->word_2 = IDT77252_PRV_PADDR(skb) + 4;
866 tbd->word_3 = 0x00000000;
867 tbd->word_4 = (skb->data[0] << 24) | (skb->data[1] << 16) |
868 (skb->data[2] << 8) | (skb->data[3] << 0);
869
870 if (test_bit(VCF_RSV, &vc->flags))
871 vc = card->vcs[0];
872
873 goto done;
874 }
875
876 if (test_bit(VCF_RSV, &vc->flags)) {
877 printk("%s: Trying to transmit on reserved VC\n", card->name);
878 goto errout;
879 }
880
881 aal = vcc->qos.aal;
882
883 switch (aal) {
884 case ATM_AAL0:
885 case ATM_AAL34:
886 if (skb->len > 52)
887 goto errout;
888
889 if (aal == ATM_AAL0)
890 tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL0 |
891 ATM_CELL_PAYLOAD;
892 else
893 tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL34 |
894 ATM_CELL_PAYLOAD;
895
896 tbd->word_2 = IDT77252_PRV_PADDR(skb) + 4;
897 tbd->word_3 = 0x00000000;
898 tbd->word_4 = (skb->data[0] << 24) | (skb->data[1] << 16) |
899 (skb->data[2] << 8) | (skb->data[3] << 0);
900 break;
901
902 case ATM_AAL5:
903 tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL5 | skb->len;
904 tbd->word_2 = IDT77252_PRV_PADDR(skb);
905 tbd->word_3 = skb->len;
906 tbd->word_4 = (vcc->vpi << SAR_TBD_VPI_SHIFT) |
907 (vcc->vci << SAR_TBD_VCI_SHIFT);
908 break;
909
910 case ATM_AAL1:
911 case ATM_AAL2:
912 default:
913 printk("%s: Traffic type not supported.\n", card->name);
914 error = -EPROTONOSUPPORT;
915 goto errout;
916 }
917
918 done:
919 spin_lock_irqsave(&vc->scq->skblock, flags);
920 skb_queue_tail(&vc->scq->pending, skb);
921
922 while ((skb = skb_dequeue(&vc->scq->pending))) {
923 if (push_on_scq(card, vc, skb)) {
924 skb_queue_head(&vc->scq->pending, skb);
925 break;
926 }
927 }
928 spin_unlock_irqrestore(&vc->scq->skblock, flags);
929
930 return 0;
931
932 errout:
933 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
934 skb->len, PCI_DMA_TODEVICE);
935 return error;
936 }
937
938 static unsigned long
939 get_free_scd(struct idt77252_dev *card, struct vc_map *vc)
940 {
941 int i;
942
943 for (i = 0; i < card->scd_size; i++) {
944 if (!card->scd2vc[i]) {
945 card->scd2vc[i] = vc;
946 vc->scd_index = i;
947 return card->scd_base + i * SAR_SRAM_SCD_SIZE;
948 }
949 }
950 return 0;
951 }
952
953 static void
954 fill_scd(struct idt77252_dev *card, struct scq_info *scq, int class)
955 {
956 write_sram(card, scq->scd, scq->paddr);
957 write_sram(card, scq->scd + 1, 0x00000000);
958 write_sram(card, scq->scd + 2, 0xffffffff);
959 write_sram(card, scq->scd + 3, 0x00000000);
960 }
961
962 static void
963 clear_scd(struct idt77252_dev *card, struct scq_info *scq, int class)
964 {
965 return;
966 }
967
968 /*****************************************************************************/
969 /* */
970 /* RSQ Handling */
971 /* */
972 /*****************************************************************************/
973
974 static int
975 init_rsq(struct idt77252_dev *card)
976 {
977 struct rsq_entry *rsqe;
978
979 card->rsq.base = pci_alloc_consistent(card->pcidev, RSQSIZE,
980 &card->rsq.paddr);
981 if (card->rsq.base == NULL) {
982 printk("%s: can't allocate RSQ.\n", card->name);
983 return -1;
984 }
985 memset(card->rsq.base, 0, RSQSIZE);
986
987 card->rsq.last = card->rsq.base + RSQ_NUM_ENTRIES - 1;
988 card->rsq.next = card->rsq.last;
989 for (rsqe = card->rsq.base; rsqe <= card->rsq.last; rsqe++)
990 rsqe->word_4 = 0;
991
992 writel((unsigned long) card->rsq.last - (unsigned long) card->rsq.base,
993 SAR_REG_RSQH);
994 writel(card->rsq.paddr, SAR_REG_RSQB);
995
996 IPRINTK("%s: RSQ base at 0x%lx (0x%x).\n", card->name,
997 (unsigned long) card->rsq.base,
998 readl(SAR_REG_RSQB));
999 IPRINTK("%s: RSQ head = 0x%x, base = 0x%x, tail = 0x%x.\n",
1000 card->name,
1001 readl(SAR_REG_RSQH),
1002 readl(SAR_REG_RSQB),
1003 readl(SAR_REG_RSQT));
1004
1005 return 0;
1006 }
1007
1008 static void
1009 deinit_rsq(struct idt77252_dev *card)
1010 {
1011 pci_free_consistent(card->pcidev, RSQSIZE,
1012 card->rsq.base, card->rsq.paddr);
1013 }
1014
1015 static void
1016 dequeue_rx(struct idt77252_dev *card, struct rsq_entry *rsqe)
1017 {
1018 struct atm_vcc *vcc;
1019 struct sk_buff *skb;
1020 struct rx_pool *rpp;
1021 struct vc_map *vc;
1022 u32 header, vpi, vci;
1023 u32 stat;
1024 int i;
1025
1026 stat = le32_to_cpu(rsqe->word_4);
1027
1028 if (stat & SAR_RSQE_IDLE) {
1029 RXPRINTK("%s: message about inactive connection.\n",
1030 card->name);
1031 return;
1032 }
1033
1034 skb = sb_pool_skb(card, le32_to_cpu(rsqe->word_2));
1035 if (skb == NULL) {
1036 printk("%s: NULL skb in %s, rsqe: %08x %08x %08x %08x\n",
1037 card->name, __FUNCTION__,
1038 le32_to_cpu(rsqe->word_1), le32_to_cpu(rsqe->word_2),
1039 le32_to_cpu(rsqe->word_3), le32_to_cpu(rsqe->word_4));
1040 return;
1041 }
1042
1043 header = le32_to_cpu(rsqe->word_1);
1044 vpi = (header >> 16) & 0x00ff;
1045 vci = (header >> 0) & 0xffff;
1046
1047 RXPRINTK("%s: SDU for %d.%d received in buffer 0x%p (data 0x%p).\n",
1048 card->name, vpi, vci, skb, skb->data);
1049
1050 if ((vpi >= (1 << card->vpibits)) || (vci != (vci & card->vcimask))) {
1051 printk("%s: SDU received for out-of-range vc %u.%u\n",
1052 card->name, vpi, vci);
1053 recycle_rx_skb(card, skb);
1054 return;
1055 }
1056
1057 vc = card->vcs[VPCI2VC(card, vpi, vci)];
1058 if (!vc || !test_bit(VCF_RX, &vc->flags)) {
1059 printk("%s: SDU received on non RX vc %u.%u\n",
1060 card->name, vpi, vci);
1061 recycle_rx_skb(card, skb);
1062 return;
1063 }
1064
1065 vcc = vc->rx_vcc;
1066
1067 pci_dma_sync_single_for_cpu(card->pcidev, IDT77252_PRV_PADDR(skb),
1068 skb_end_pointer(skb) - skb->data,
1069 PCI_DMA_FROMDEVICE);
1070
1071 if ((vcc->qos.aal == ATM_AAL0) ||
1072 (vcc->qos.aal == ATM_AAL34)) {
1073 struct sk_buff *sb;
1074 unsigned char *cell;
1075 u32 aal0;
1076
1077 cell = skb->data;
1078 for (i = (stat & SAR_RSQE_CELLCNT); i; i--) {
1079 if ((sb = dev_alloc_skb(64)) == NULL) {
1080 printk("%s: Can't allocate buffers for aal0.\n",
1081 card->name);
1082 atomic_add(i, &vcc->stats->rx_drop);
1083 break;
1084 }
1085 if (!atm_charge(vcc, sb->truesize)) {
1086 RXPRINTK("%s: atm_charge() dropped aal0 packets.\n",
1087 card->name);
1088 atomic_add(i - 1, &vcc->stats->rx_drop);
1089 dev_kfree_skb(sb);
1090 break;
1091 }
1092 aal0 = (vpi << ATM_HDR_VPI_SHIFT) |
1093 (vci << ATM_HDR_VCI_SHIFT);
1094 aal0 |= (stat & SAR_RSQE_EPDU) ? 0x00000002 : 0;
1095 aal0 |= (stat & SAR_RSQE_CLP) ? 0x00000001 : 0;
1096
1097 *((u32 *) sb->data) = aal0;
1098 skb_put(sb, sizeof(u32));
1099 memcpy(skb_put(sb, ATM_CELL_PAYLOAD),
1100 cell, ATM_CELL_PAYLOAD);
1101
1102 ATM_SKB(sb)->vcc = vcc;
1103 __net_timestamp(sb);
1104 vcc->push(vcc, sb);
1105 atomic_inc(&vcc->stats->rx);
1106
1107 cell += ATM_CELL_PAYLOAD;
1108 }
1109
1110 recycle_rx_skb(card, skb);
1111 return;
1112 }
1113 if (vcc->qos.aal != ATM_AAL5) {
1114 printk("%s: Unexpected AAL type in dequeue_rx(): %d.\n",
1115 card->name, vcc->qos.aal);
1116 recycle_rx_skb(card, skb);
1117 return;
1118 }
1119 skb->len = (stat & SAR_RSQE_CELLCNT) * ATM_CELL_PAYLOAD;
1120
1121 rpp = &vc->rcv.rx_pool;
1122
1123 rpp->len += skb->len;
1124 if (!rpp->count++)
1125 rpp->first = skb;
1126 *rpp->last = skb;
1127 rpp->last = &skb->next;
1128
1129 if (stat & SAR_RSQE_EPDU) {
1130 unsigned char *l1l2;
1131 unsigned int len;
1132
1133 l1l2 = (unsigned char *) ((unsigned long) skb->data + skb->len - 6);
1134
1135 len = (l1l2[0] << 8) | l1l2[1];
1136 len = len ? len : 0x10000;
1137
1138 RXPRINTK("%s: PDU has %d bytes.\n", card->name, len);
1139
1140 if ((len + 8 > rpp->len) || (len + (47 + 8) < rpp->len)) {
1141 RXPRINTK("%s: AAL5 PDU size mismatch: %d != %d. "
1142 "(CDC: %08x)\n",
1143 card->name, len, rpp->len, readl(SAR_REG_CDC));
1144 recycle_rx_pool_skb(card, rpp);
1145 atomic_inc(&vcc->stats->rx_err);
1146 return;
1147 }
1148 if (stat & SAR_RSQE_CRC) {
1149 RXPRINTK("%s: AAL5 CRC error.\n", card->name);
1150 recycle_rx_pool_skb(card, rpp);
1151 atomic_inc(&vcc->stats->rx_err);
1152 return;
1153 }
1154 if (rpp->count > 1) {
1155 struct sk_buff *sb;
1156
1157 skb = dev_alloc_skb(rpp->len);
1158 if (!skb) {
1159 RXPRINTK("%s: Can't alloc RX skb.\n",
1160 card->name);
1161 recycle_rx_pool_skb(card, rpp);
1162 atomic_inc(&vcc->stats->rx_err);
1163 return;
1164 }
1165 if (!atm_charge(vcc, skb->truesize)) {
1166 recycle_rx_pool_skb(card, rpp);
1167 dev_kfree_skb(skb);
1168 return;
1169 }
1170 sb = rpp->first;
1171 for (i = 0; i < rpp->count; i++) {
1172 memcpy(skb_put(skb, sb->len),
1173 sb->data, sb->len);
1174 sb = sb->next;
1175 }
1176
1177 recycle_rx_pool_skb(card, rpp);
1178
1179 skb_trim(skb, len);
1180 ATM_SKB(skb)->vcc = vcc;
1181 __net_timestamp(skb);
1182
1183 vcc->push(vcc, skb);
1184 atomic_inc(&vcc->stats->rx);
1185
1186 return;
1187 }
1188
1189 skb->next = NULL;
1190 flush_rx_pool(card, rpp);
1191
1192 if (!atm_charge(vcc, skb->truesize)) {
1193 recycle_rx_skb(card, skb);
1194 return;
1195 }
1196
1197 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
1198 skb_end_pointer(skb) - skb->data,
1199 PCI_DMA_FROMDEVICE);
1200 sb_pool_remove(card, skb);
1201
1202 skb_trim(skb, len);
1203 ATM_SKB(skb)->vcc = vcc;
1204 __net_timestamp(skb);
1205
1206 vcc->push(vcc, skb);
1207 atomic_inc(&vcc->stats->rx);
1208
1209 if (skb->truesize > SAR_FB_SIZE_3)
1210 add_rx_skb(card, 3, SAR_FB_SIZE_3, 1);
1211 else if (skb->truesize > SAR_FB_SIZE_2)
1212 add_rx_skb(card, 2, SAR_FB_SIZE_2, 1);
1213 else if (skb->truesize > SAR_FB_SIZE_1)
1214 add_rx_skb(card, 1, SAR_FB_SIZE_1, 1);
1215 else
1216 add_rx_skb(card, 0, SAR_FB_SIZE_0, 1);
1217 return;
1218 }
1219 }
1220
1221 static void
1222 idt77252_rx(struct idt77252_dev *card)
1223 {
1224 struct rsq_entry *rsqe;
1225
1226 if (card->rsq.next == card->rsq.last)
1227 rsqe = card->rsq.base;
1228 else
1229 rsqe = card->rsq.next + 1;
1230
1231 if (!(le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID)) {
1232 RXPRINTK("%s: no entry in RSQ.\n", card->name);
1233 return;
1234 }
1235
1236 do {
1237 dequeue_rx(card, rsqe);
1238 rsqe->word_4 = 0;
1239 card->rsq.next = rsqe;
1240 if (card->rsq.next == card->rsq.last)
1241 rsqe = card->rsq.base;
1242 else
1243 rsqe = card->rsq.next + 1;
1244 } while (le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID);
1245
1246 writel((unsigned long) card->rsq.next - (unsigned long) card->rsq.base,
1247 SAR_REG_RSQH);
1248 }
1249
1250 static void
1251 idt77252_rx_raw(struct idt77252_dev *card)
1252 {
1253 struct sk_buff *queue;
1254 u32 head, tail;
1255 struct atm_vcc *vcc;
1256 struct vc_map *vc;
1257 struct sk_buff *sb;
1258
1259 if (card->raw_cell_head == NULL) {
1260 u32 handle = le32_to_cpu(*(card->raw_cell_hnd + 1));
1261 card->raw_cell_head = sb_pool_skb(card, handle);
1262 }
1263
1264 queue = card->raw_cell_head;
1265 if (!queue)
1266 return;
1267
1268 head = IDT77252_PRV_PADDR(queue) + (queue->data - queue->head - 16);
1269 tail = readl(SAR_REG_RAWCT);
1270
1271 pci_dma_sync_single_for_cpu(card->pcidev, IDT77252_PRV_PADDR(queue),
1272 skb_end_pointer(queue) - queue->head - 16,
1273 PCI_DMA_FROMDEVICE);
1274
1275 while (head != tail) {
1276 unsigned int vpi, vci, pti;
1277 u32 header;
1278
1279 header = le32_to_cpu(*(u32 *) &queue->data[0]);
1280
1281 vpi = (header & ATM_HDR_VPI_MASK) >> ATM_HDR_VPI_SHIFT;
1282 vci = (header & ATM_HDR_VCI_MASK) >> ATM_HDR_VCI_SHIFT;
1283 pti = (header & ATM_HDR_PTI_MASK) >> ATM_HDR_PTI_SHIFT;
1284
1285 #ifdef CONFIG_ATM_IDT77252_DEBUG
1286 if (debug & DBG_RAW_CELL) {
1287 int i;
1288
1289 printk("%s: raw cell %x.%02x.%04x.%x.%x\n",
1290 card->name, (header >> 28) & 0x000f,
1291 (header >> 20) & 0x00ff,
1292 (header >> 4) & 0xffff,
1293 (header >> 1) & 0x0007,
1294 (header >> 0) & 0x0001);
1295 for (i = 16; i < 64; i++)
1296 printk(" %02x", queue->data[i]);
1297 printk("\n");
1298 }
1299 #endif
1300
1301 if (vpi >= (1<<card->vpibits) || vci >= (1<<card->vcibits)) {
1302 RPRINTK("%s: SDU received for out-of-range vc %u.%u\n",
1303 card->name, vpi, vci);
1304 goto drop;
1305 }
1306
1307 vc = card->vcs[VPCI2VC(card, vpi, vci)];
1308 if (!vc || !test_bit(VCF_RX, &vc->flags)) {
1309 RPRINTK("%s: SDU received on non RX vc %u.%u\n",
1310 card->name, vpi, vci);
1311 goto drop;
1312 }
1313
1314 vcc = vc->rx_vcc;
1315
1316 if (vcc->qos.aal != ATM_AAL0) {
1317 RPRINTK("%s: raw cell for non AAL0 vc %u.%u\n",
1318 card->name, vpi, vci);
1319 atomic_inc(&vcc->stats->rx_drop);
1320 goto drop;
1321 }
1322
1323 if ((sb = dev_alloc_skb(64)) == NULL) {
1324 printk("%s: Can't allocate buffers for AAL0.\n",
1325 card->name);
1326 atomic_inc(&vcc->stats->rx_err);
1327 goto drop;
1328 }
1329
1330 if (!atm_charge(vcc, sb->truesize)) {
1331 RXPRINTK("%s: atm_charge() dropped AAL0 packets.\n",
1332 card->name);
1333 dev_kfree_skb(sb);
1334 goto drop;
1335 }
1336
1337 *((u32 *) sb->data) = header;
1338 skb_put(sb, sizeof(u32));
1339 memcpy(skb_put(sb, ATM_CELL_PAYLOAD), &(queue->data[16]),
1340 ATM_CELL_PAYLOAD);
1341
1342 ATM_SKB(sb)->vcc = vcc;
1343 __net_timestamp(sb);
1344 vcc->push(vcc, sb);
1345 atomic_inc(&vcc->stats->rx);
1346
1347 drop:
1348 skb_pull(queue, 64);
1349
1350 head = IDT77252_PRV_PADDR(queue)
1351 + (queue->data - queue->head - 16);
1352
1353 if (queue->len < 128) {
1354 struct sk_buff *next;
1355 u32 handle;
1356
1357 head = le32_to_cpu(*(u32 *) &queue->data[0]);
1358 handle = le32_to_cpu(*(u32 *) &queue->data[4]);
1359
1360 next = sb_pool_skb(card, handle);
1361 recycle_rx_skb(card, queue);
1362
1363 if (next) {
1364 card->raw_cell_head = next;
1365 queue = card->raw_cell_head;
1366 pci_dma_sync_single_for_cpu(card->pcidev,
1367 IDT77252_PRV_PADDR(queue),
1368 (skb_end_pointer(queue) -
1369 queue->data),
1370 PCI_DMA_FROMDEVICE);
1371 } else {
1372 card->raw_cell_head = NULL;
1373 printk("%s: raw cell queue overrun\n",
1374 card->name);
1375 break;
1376 }
1377 }
1378 }
1379 }
1380
1381
1382 /*****************************************************************************/
1383 /* */
1384 /* TSQ Handling */
1385 /* */
1386 /*****************************************************************************/
1387
1388 static int
1389 init_tsq(struct idt77252_dev *card)
1390 {
1391 struct tsq_entry *tsqe;
1392
1393 card->tsq.base = pci_alloc_consistent(card->pcidev, RSQSIZE,
1394 &card->tsq.paddr);
1395 if (card->tsq.base == NULL) {
1396 printk("%s: can't allocate TSQ.\n", card->name);
1397 return -1;
1398 }
1399 memset(card->tsq.base, 0, TSQSIZE);
1400
1401 card->tsq.last = card->tsq.base + TSQ_NUM_ENTRIES - 1;
1402 card->tsq.next = card->tsq.last;
1403 for (tsqe = card->tsq.base; tsqe <= card->tsq.last; tsqe++)
1404 tsqe->word_2 = cpu_to_le32(SAR_TSQE_INVALID);
1405
1406 writel(card->tsq.paddr, SAR_REG_TSQB);
1407 writel((unsigned long) card->tsq.next - (unsigned long) card->tsq.base,
1408 SAR_REG_TSQH);
1409
1410 return 0;
1411 }
1412
1413 static void
1414 deinit_tsq(struct idt77252_dev *card)
1415 {
1416 pci_free_consistent(card->pcidev, TSQSIZE,
1417 card->tsq.base, card->tsq.paddr);
1418 }
1419
1420 static void
1421 idt77252_tx(struct idt77252_dev *card)
1422 {
1423 struct tsq_entry *tsqe;
1424 unsigned int vpi, vci;
1425 struct vc_map *vc;
1426 u32 conn, stat;
1427
1428 if (card->tsq.next == card->tsq.last)
1429 tsqe = card->tsq.base;
1430 else
1431 tsqe = card->tsq.next + 1;
1432
1433 TXPRINTK("idt77252_tx: tsq %p: base %p, next %p, last %p\n", tsqe,
1434 card->tsq.base, card->tsq.next, card->tsq.last);
1435 TXPRINTK("idt77252_tx: tsqb %08x, tsqt %08x, tsqh %08x, \n",
1436 readl(SAR_REG_TSQB),
1437 readl(SAR_REG_TSQT),
1438 readl(SAR_REG_TSQH));
1439
1440 stat = le32_to_cpu(tsqe->word_2);
1441
1442 if (stat & SAR_TSQE_INVALID)
1443 return;
1444
1445 do {
1446 TXPRINTK("tsqe: 0x%p [0x%08x 0x%08x]\n", tsqe,
1447 le32_to_cpu(tsqe->word_1),
1448 le32_to_cpu(tsqe->word_2));
1449
1450 switch (stat & SAR_TSQE_TYPE) {
1451 case SAR_TSQE_TYPE_TIMER:
1452 TXPRINTK("%s: Timer RollOver detected.\n", card->name);
1453 break;
1454
1455 case SAR_TSQE_TYPE_IDLE:
1456
1457 conn = le32_to_cpu(tsqe->word_1);
1458
1459 if (SAR_TSQE_TAG(stat) == 0x10) {
1460 #ifdef NOTDEF
1461 printk("%s: Connection %d halted.\n",
1462 card->name,
1463 le32_to_cpu(tsqe->word_1) & 0x1fff);
1464 #endif
1465 break;
1466 }
1467
1468 vc = card->vcs[conn & 0x1fff];
1469 if (!vc) {
1470 printk("%s: could not find VC from conn %d\n",
1471 card->name, conn & 0x1fff);
1472 break;
1473 }
1474
1475 printk("%s: Connection %d IDLE.\n",
1476 card->name, vc->index);
1477
1478 set_bit(VCF_IDLE, &vc->flags);
1479 break;
1480
1481 case SAR_TSQE_TYPE_TSR:
1482
1483 conn = le32_to_cpu(tsqe->word_1);
1484
1485 vc = card->vcs[conn & 0x1fff];
1486 if (!vc) {
1487 printk("%s: no VC at index %d\n",
1488 card->name,
1489 le32_to_cpu(tsqe->word_1) & 0x1fff);
1490 break;
1491 }
1492
1493 drain_scq(card, vc);
1494 break;
1495
1496 case SAR_TSQE_TYPE_TBD_COMP:
1497
1498 conn = le32_to_cpu(tsqe->word_1);
1499
1500 vpi = (conn >> SAR_TBD_VPI_SHIFT) & 0x00ff;
1501 vci = (conn >> SAR_TBD_VCI_SHIFT) & 0xffff;
1502
1503 if (vpi >= (1 << card->vpibits) ||
1504 vci >= (1 << card->vcibits)) {
1505 printk("%s: TBD complete: "
1506 "out of range VPI.VCI %u.%u\n",
1507 card->name, vpi, vci);
1508 break;
1509 }
1510
1511 vc = card->vcs[VPCI2VC(card, vpi, vci)];
1512 if (!vc) {
1513 printk("%s: TBD complete: "
1514 "no VC at VPI.VCI %u.%u\n",
1515 card->name, vpi, vci);
1516 break;
1517 }
1518
1519 drain_scq(card, vc);
1520 break;
1521 }
1522
1523 tsqe->word_2 = cpu_to_le32(SAR_TSQE_INVALID);
1524
1525 card->tsq.next = tsqe;
1526 if (card->tsq.next == card->tsq.last)
1527 tsqe = card->tsq.base;
1528 else
1529 tsqe = card->tsq.next + 1;
1530
1531 TXPRINTK("tsqe: %p: base %p, next %p, last %p\n", tsqe,
1532 card->tsq.base, card->tsq.next, card->tsq.last);
1533
1534 stat = le32_to_cpu(tsqe->word_2);
1535
1536 } while (!(stat & SAR_TSQE_INVALID));
1537
1538 writel((unsigned long)card->tsq.next - (unsigned long)card->tsq.base,
1539 SAR_REG_TSQH);
1540
1541 XPRINTK("idt77252_tx-after writel%d: TSQ head = 0x%x, tail = 0x%x, next = 0x%p.\n",
1542 card->index, readl(SAR_REG_TSQH),
1543 readl(SAR_REG_TSQT), card->tsq.next);
1544 }
1545
1546
1547 static void
1548 tst_timer(unsigned long data)
1549 {
1550 struct idt77252_dev *card = (struct idt77252_dev *)data;
1551 unsigned long base, idle, jump;
1552 unsigned long flags;
1553 u32 pc;
1554 int e;
1555
1556 spin_lock_irqsave(&card->tst_lock, flags);
1557
1558 base = card->tst[card->tst_index];
1559 idle = card->tst[card->tst_index ^ 1];
1560
1561 if (test_bit(TST_SWITCH_WAIT, &card->tst_state)) {
1562 jump = base + card->tst_size - 2;
1563
1564 pc = readl(SAR_REG_NOW) >> 2;
1565 if ((pc ^ idle) & ~(card->tst_size - 1)) {
1566 mod_timer(&card->tst_timer, jiffies + 1);
1567 goto out;
1568 }
1569
1570 clear_bit(TST_SWITCH_WAIT, &card->tst_state);
1571
1572 card->tst_index ^= 1;
1573 write_sram(card, jump, TSTE_OPC_JMP | (base << 2));
1574
1575 base = card->tst[card->tst_index];
1576 idle = card->tst[card->tst_index ^ 1];
1577
1578 for (e = 0; e < card->tst_size - 2; e++) {
1579 if (card->soft_tst[e].tste & TSTE_PUSH_IDLE) {
1580 write_sram(card, idle + e,
1581 card->soft_tst[e].tste & TSTE_MASK);
1582 card->soft_tst[e].tste &= ~(TSTE_PUSH_IDLE);
1583 }
1584 }
1585 }
1586
1587 if (test_and_clear_bit(TST_SWITCH_PENDING, &card->tst_state)) {
1588
1589 for (e = 0; e < card->tst_size - 2; e++) {
1590 if (card->soft_tst[e].tste & TSTE_PUSH_ACTIVE) {
1591 write_sram(card, idle + e,
1592 card->soft_tst[e].tste & TSTE_MASK);
1593 card->soft_tst[e].tste &= ~(TSTE_PUSH_ACTIVE);
1594 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1595 }
1596 }
1597
1598 jump = base + card->tst_size - 2;
1599
1600 write_sram(card, jump, TSTE_OPC_NULL);
1601 set_bit(TST_SWITCH_WAIT, &card->tst_state);
1602
1603 mod_timer(&card->tst_timer, jiffies + 1);
1604 }
1605
1606 out:
1607 spin_unlock_irqrestore(&card->tst_lock, flags);
1608 }
1609
1610 static int
1611 __fill_tst(struct idt77252_dev *card, struct vc_map *vc,
1612 int n, unsigned int opc)
1613 {
1614 unsigned long cl, avail;
1615 unsigned long idle;
1616 int e, r;
1617 u32 data;
1618
1619 avail = card->tst_size - 2;
1620 for (e = 0; e < avail; e++) {
1621 if (card->soft_tst[e].vc == NULL)
1622 break;
1623 }
1624 if (e >= avail) {
1625 printk("%s: No free TST entries found\n", card->name);
1626 return -1;
1627 }
1628
1629 NPRINTK("%s: conn %d: first TST entry at %d.\n",
1630 card->name, vc ? vc->index : -1, e);
1631
1632 r = n;
1633 cl = avail;
1634 data = opc & TSTE_OPC_MASK;
1635 if (vc && (opc != TSTE_OPC_NULL))
1636 data = opc | vc->index;
1637
1638 idle = card->tst[card->tst_index ^ 1];
1639
1640 /*
1641 * Fill Soft TST.
1642 */
1643 while (r > 0) {
1644 if ((cl >= avail) && (card->soft_tst[e].vc == NULL)) {
1645 if (vc)
1646 card->soft_tst[e].vc = vc;
1647 else
1648 card->soft_tst[e].vc = (void *)-1;
1649
1650 card->soft_tst[e].tste = data;
1651 if (timer_pending(&card->tst_timer))
1652 card->soft_tst[e].tste |= TSTE_PUSH_ACTIVE;
1653 else {
1654 write_sram(card, idle + e, data);
1655 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1656 }
1657
1658 cl -= card->tst_size;
1659 r--;
1660 }
1661
1662 if (++e == avail)
1663 e = 0;
1664 cl += n;
1665 }
1666
1667 return 0;
1668 }
1669
1670 static int
1671 fill_tst(struct idt77252_dev *card, struct vc_map *vc, int n, unsigned int opc)
1672 {
1673 unsigned long flags;
1674 int res;
1675
1676 spin_lock_irqsave(&card->tst_lock, flags);
1677
1678 res = __fill_tst(card, vc, n, opc);
1679
1680 set_bit(TST_SWITCH_PENDING, &card->tst_state);
1681 if (!timer_pending(&card->tst_timer))
1682 mod_timer(&card->tst_timer, jiffies + 1);
1683
1684 spin_unlock_irqrestore(&card->tst_lock, flags);
1685 return res;
1686 }
1687
1688 static int
1689 __clear_tst(struct idt77252_dev *card, struct vc_map *vc)
1690 {
1691 unsigned long idle;
1692 int e;
1693
1694 idle = card->tst[card->tst_index ^ 1];
1695
1696 for (e = 0; e < card->tst_size - 2; e++) {
1697 if (card->soft_tst[e].vc == vc) {
1698 card->soft_tst[e].vc = NULL;
1699
1700 card->soft_tst[e].tste = TSTE_OPC_VAR;
1701 if (timer_pending(&card->tst_timer))
1702 card->soft_tst[e].tste |= TSTE_PUSH_ACTIVE;
1703 else {
1704 write_sram(card, idle + e, TSTE_OPC_VAR);
1705 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1706 }
1707 }
1708 }
1709
1710 return 0;
1711 }
1712
1713 static int
1714 clear_tst(struct idt77252_dev *card, struct vc_map *vc)
1715 {
1716 unsigned long flags;
1717 int res;
1718
1719 spin_lock_irqsave(&card->tst_lock, flags);
1720
1721 res = __clear_tst(card, vc);
1722
1723 set_bit(TST_SWITCH_PENDING, &card->tst_state);
1724 if (!timer_pending(&card->tst_timer))
1725 mod_timer(&card->tst_timer, jiffies + 1);
1726
1727 spin_unlock_irqrestore(&card->tst_lock, flags);
1728 return res;
1729 }
1730
1731 static int
1732 change_tst(struct idt77252_dev *card, struct vc_map *vc,
1733 int n, unsigned int opc)
1734 {
1735 unsigned long flags;
1736 int res;
1737
1738 spin_lock_irqsave(&card->tst_lock, flags);
1739
1740 __clear_tst(card, vc);
1741 res = __fill_tst(card, vc, n, opc);
1742
1743 set_bit(TST_SWITCH_PENDING, &card->tst_state);
1744 if (!timer_pending(&card->tst_timer))
1745 mod_timer(&card->tst_timer, jiffies + 1);
1746
1747 spin_unlock_irqrestore(&card->tst_lock, flags);
1748 return res;
1749 }
1750
1751
1752 static int
1753 set_tct(struct idt77252_dev *card, struct vc_map *vc)
1754 {
1755 unsigned long tct;
1756
1757 tct = (unsigned long) (card->tct_base + vc->index * SAR_SRAM_TCT_SIZE);
1758
1759 switch (vc->class) {
1760 case SCHED_CBR:
1761 OPRINTK("%s: writing TCT at 0x%lx, SCD 0x%lx.\n",
1762 card->name, tct, vc->scq->scd);
1763
1764 write_sram(card, tct + 0, TCT_CBR | vc->scq->scd);
1765 write_sram(card, tct + 1, 0);
1766 write_sram(card, tct + 2, 0);
1767 write_sram(card, tct + 3, 0);
1768 write_sram(card, tct + 4, 0);
1769 write_sram(card, tct + 5, 0);
1770 write_sram(card, tct + 6, 0);
1771 write_sram(card, tct + 7, 0);
1772 break;
1773
1774 case SCHED_UBR:
1775 OPRINTK("%s: writing TCT at 0x%lx, SCD 0x%lx.\n",
1776 card->name, tct, vc->scq->scd);
1777
1778 write_sram(card, tct + 0, TCT_UBR | vc->scq->scd);
1779 write_sram(card, tct + 1, 0);
1780 write_sram(card, tct + 2, TCT_TSIF);
1781 write_sram(card, tct + 3, TCT_HALT | TCT_IDLE);
1782 write_sram(card, tct + 4, 0);
1783 write_sram(card, tct + 5, vc->init_er);
1784 write_sram(card, tct + 6, 0);
1785 write_sram(card, tct + 7, TCT_FLAG_UBR);
1786 break;
1787
1788 case SCHED_VBR:
1789 case SCHED_ABR:
1790 default:
1791 return -ENOSYS;
1792 }
1793
1794 return 0;
1795 }
1796
1797 /*****************************************************************************/
1798 /* */
1799 /* FBQ Handling */
1800 /* */
1801 /*****************************************************************************/
1802
1803 static __inline__ int
1804 idt77252_fbq_level(struct idt77252_dev *card, int queue)
1805 {
1806 return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) & 0x0f;
1807 }
1808
1809 static __inline__ int
1810 idt77252_fbq_full(struct idt77252_dev *card, int queue)
1811 {
1812 return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) == 0x0f;
1813 }
1814
1815 static int
1816 push_rx_skb(struct idt77252_dev *card, struct sk_buff *skb, int queue)
1817 {
1818 unsigned long flags;
1819 u32 handle;
1820 u32 addr;
1821
1822 skb->data = skb->head;
1823 skb_reset_tail_pointer(skb);
1824 skb->len = 0;
1825
1826 skb_reserve(skb, 16);
1827
1828 switch (queue) {
1829 case 0:
1830 skb_put(skb, SAR_FB_SIZE_0);
1831 break;
1832 case 1:
1833 skb_put(skb, SAR_FB_SIZE_1);
1834 break;
1835 case 2:
1836 skb_put(skb, SAR_FB_SIZE_2);
1837 break;
1838 case 3:
1839 skb_put(skb, SAR_FB_SIZE_3);
1840 break;
1841 default:
1842 return -1;
1843 }
1844
1845 if (idt77252_fbq_full(card, queue))
1846 return -1;
1847
1848 memset(&skb->data[(skb->len & ~(0x3f)) - 64], 0, 2 * sizeof(u32));
1849
1850 handle = IDT77252_PRV_POOL(skb);
1851 addr = IDT77252_PRV_PADDR(skb);
1852
1853 spin_lock_irqsave(&card->cmd_lock, flags);
1854 writel(handle, card->fbq[queue]);
1855 writel(addr, card->fbq[queue]);
1856 spin_unlock_irqrestore(&card->cmd_lock, flags);
1857
1858 return 0;
1859 }
1860
1861 static void
1862 add_rx_skb(struct idt77252_dev *card, int queue,
1863 unsigned int size, unsigned int count)
1864 {
1865 struct sk_buff *skb;
1866 dma_addr_t paddr;
1867 u32 handle;
1868
1869 while (count--) {
1870 skb = dev_alloc_skb(size);
1871 if (!skb)
1872 return;
1873
1874 if (sb_pool_add(card, skb, queue)) {
1875 printk("%s: SB POOL full\n", __FUNCTION__);
1876 goto outfree;
1877 }
1878
1879 paddr = pci_map_single(card->pcidev, skb->data,
1880 skb_end_pointer(skb) - skb->data,
1881 PCI_DMA_FROMDEVICE);
1882 IDT77252_PRV_PADDR(skb) = paddr;
1883
1884 if (push_rx_skb(card, skb, queue)) {
1885 printk("%s: FB QUEUE full\n", __FUNCTION__);
1886 goto outunmap;
1887 }
1888 }
1889
1890 return;
1891
1892 outunmap:
1893 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
1894 skb_end_pointer(skb) - skb->data, PCI_DMA_FROMDEVICE);
1895
1896 handle = IDT77252_PRV_POOL(skb);
1897 card->sbpool[POOL_QUEUE(handle)].skb[POOL_INDEX(handle)] = NULL;
1898
1899 outfree:
1900 dev_kfree_skb(skb);
1901 }
1902
1903
1904 static void
1905 recycle_rx_skb(struct idt77252_dev *card, struct sk_buff *skb)
1906 {
1907 u32 handle = IDT77252_PRV_POOL(skb);
1908 int err;
1909
1910 pci_dma_sync_single_for_device(card->pcidev, IDT77252_PRV_PADDR(skb),
1911 skb_end_pointer(skb) - skb->data,
1912 PCI_DMA_FROMDEVICE);
1913
1914 err = push_rx_skb(card, skb, POOL_QUEUE(handle));
1915 if (err) {
1916 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
1917 skb_end_pointer(skb) - skb->data,
1918 PCI_DMA_FROMDEVICE);
1919 sb_pool_remove(card, skb);
1920 dev_kfree_skb(skb);
1921 }
1922 }
1923
1924 static void
1925 flush_rx_pool(struct idt77252_dev *card, struct rx_pool *rpp)
1926 {
1927 rpp->len = 0;
1928 rpp->count = 0;
1929 rpp->first = NULL;
1930 rpp->last = &rpp->first;
1931 }
1932
1933 static void
1934 recycle_rx_pool_skb(struct idt77252_dev *card, struct rx_pool *rpp)
1935 {
1936 struct sk_buff *skb, *next;
1937 int i;
1938
1939 skb = rpp->first;
1940 for (i = 0; i < rpp->count; i++) {
1941 next = skb->next;
1942 skb->next = NULL;
1943 recycle_rx_skb(card, skb);
1944 skb = next;
1945 }
1946 flush_rx_pool(card, rpp);
1947 }
1948
1949 /*****************************************************************************/
1950 /* */
1951 /* ATM Interface */
1952 /* */
1953 /*****************************************************************************/
1954
1955 static void
1956 idt77252_phy_put(struct atm_dev *dev, unsigned char value, unsigned long addr)
1957 {
1958 write_utility(dev->dev_data, 0x100 + (addr & 0x1ff), value);
1959 }
1960
1961 static unsigned char
1962 idt77252_phy_get(struct atm_dev *dev, unsigned long addr)
1963 {
1964 return read_utility(dev->dev_data, 0x100 + (addr & 0x1ff));
1965 }
1966
1967 static inline int
1968 idt77252_send_skb(struct atm_vcc *vcc, struct sk_buff *skb, int oam)
1969 {
1970 struct atm_dev *dev = vcc->dev;
1971 struct idt77252_dev *card = dev->dev_data;
1972 struct vc_map *vc = vcc->dev_data;
1973 int err;
1974
1975 if (vc == NULL) {
1976 printk("%s: NULL connection in send().\n", card->name);
1977 atomic_inc(&vcc->stats->tx_err);
1978 dev_kfree_skb(skb);
1979 return -EINVAL;
1980 }
1981 if (!test_bit(VCF_TX, &vc->flags)) {
1982 printk("%s: Trying to transmit on a non-tx VC.\n", card->name);
1983 atomic_inc(&vcc->stats->tx_err);
1984 dev_kfree_skb(skb);
1985 return -EINVAL;
1986 }
1987
1988 switch (vcc->qos.aal) {
1989 case ATM_AAL0:
1990 case ATM_AAL1:
1991 case ATM_AAL5:
1992 break;
1993 default:
1994 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal);
1995 atomic_inc(&vcc->stats->tx_err);
1996 dev_kfree_skb(skb);
1997 return -EINVAL;
1998 }
1999
2000 if (skb_shinfo(skb)->nr_frags != 0) {
2001 printk("%s: No scatter-gather yet.\n", card->name);
2002 atomic_inc(&vcc->stats->tx_err);
2003 dev_kfree_skb(skb);
2004 return -EINVAL;
2005 }
2006 ATM_SKB(skb)->vcc = vcc;
2007
2008 err = queue_skb(card, vc, skb, oam);
2009 if (err) {
2010 atomic_inc(&vcc->stats->tx_err);
2011 dev_kfree_skb(skb);
2012 return err;
2013 }
2014
2015 return 0;
2016 }
2017
2018 int
2019 idt77252_send(struct atm_vcc *vcc, struct sk_buff *skb)
2020 {
2021 return idt77252_send_skb(vcc, skb, 0);
2022 }
2023
2024 static int
2025 idt77252_send_oam(struct atm_vcc *vcc, void *cell, int flags)
2026 {
2027 struct atm_dev *dev = vcc->dev;
2028 struct idt77252_dev *card = dev->dev_data;
2029 struct sk_buff *skb;
2030
2031 skb = dev_alloc_skb(64);
2032 if (!skb) {
2033 printk("%s: Out of memory in send_oam().\n", card->name);
2034 atomic_inc(&vcc->stats->tx_err);
2035 return -ENOMEM;
2036 }
2037 atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
2038
2039 memcpy(skb_put(skb, 52), cell, 52);
2040
2041 return idt77252_send_skb(vcc, skb, 1);
2042 }
2043
2044 static __inline__ unsigned int
2045 idt77252_fls(unsigned int x)
2046 {
2047 int r = 1;
2048
2049 if (x == 0)
2050 return 0;
2051 if (x & 0xffff0000) {
2052 x >>= 16;
2053 r += 16;
2054 }
2055 if (x & 0xff00) {
2056 x >>= 8;
2057 r += 8;
2058 }
2059 if (x & 0xf0) {
2060 x >>= 4;
2061 r += 4;
2062 }
2063 if (x & 0xc) {
2064 x >>= 2;
2065 r += 2;
2066 }
2067 if (x & 0x2)
2068 r += 1;
2069 return r;
2070 }
2071
2072 static u16
2073 idt77252_int_to_atmfp(unsigned int rate)
2074 {
2075 u16 m, e;
2076
2077 if (rate == 0)
2078 return 0;
2079 e = idt77252_fls(rate) - 1;
2080 if (e < 9)
2081 m = (rate - (1 << e)) << (9 - e);
2082 else if (e == 9)
2083 m = (rate - (1 << e));
2084 else /* e > 9 */
2085 m = (rate - (1 << e)) >> (e - 9);
2086 return 0x4000 | (e << 9) | m;
2087 }
2088
2089 static u8
2090 idt77252_rate_logindex(struct idt77252_dev *card, int pcr)
2091 {
2092 u16 afp;
2093
2094 afp = idt77252_int_to_atmfp(pcr < 0 ? -pcr : pcr);
2095 if (pcr < 0)
2096 return rate_to_log[(afp >> 5) & 0x1ff];
2097 return rate_to_log[((afp >> 5) + 1) & 0x1ff];
2098 }
2099
2100 static void
2101 idt77252_est_timer(unsigned long data)
2102 {
2103 struct vc_map *vc = (struct vc_map *)data;
2104 struct idt77252_dev *card = vc->card;
2105 struct rate_estimator *est;
2106 unsigned long flags;
2107 u32 rate, cps;
2108 u64 ncells;
2109 u8 lacr;
2110
2111 spin_lock_irqsave(&vc->lock, flags);
2112 est = vc->estimator;
2113 if (!est)
2114 goto out;
2115
2116 ncells = est->cells;
2117
2118 rate = ((u32)(ncells - est->last_cells)) << (7 - est->interval);
2119 est->last_cells = ncells;
2120 est->avcps += ((long)rate - (long)est->avcps) >> est->ewma_log;
2121 est->cps = (est->avcps + 0x1f) >> 5;
2122
2123 cps = est->cps;
2124 if (cps < (est->maxcps >> 4))
2125 cps = est->maxcps >> 4;
2126
2127 lacr = idt77252_rate_logindex(card, cps);
2128 if (lacr > vc->max_er)
2129 lacr = vc->max_er;
2130
2131 if (lacr != vc->lacr) {
2132 vc->lacr = lacr;
2133 writel(TCMDQ_LACR|(vc->lacr << 16)|vc->index, SAR_REG_TCMDQ);
2134 }
2135
2136 est->timer.expires = jiffies + ((HZ / 4) << est->interval);
2137 add_timer(&est->timer);
2138
2139 out:
2140 spin_unlock_irqrestore(&vc->lock, flags);
2141 }
2142
2143 static struct rate_estimator *
2144 idt77252_init_est(struct vc_map *vc, int pcr)
2145 {
2146 struct rate_estimator *est;
2147
2148 est = kzalloc(sizeof(struct rate_estimator), GFP_KERNEL);
2149 if (!est)
2150 return NULL;
2151 est->maxcps = pcr < 0 ? -pcr : pcr;
2152 est->cps = est->maxcps;
2153 est->avcps = est->cps << 5;
2154
2155 est->interval = 2; /* XXX: make this configurable */
2156 est->ewma_log = 2; /* XXX: make this configurable */
2157 init_timer(&est->timer);
2158 est->timer.data = (unsigned long)vc;
2159 est->timer.function = idt77252_est_timer;
2160
2161 est->timer.expires = jiffies + ((HZ / 4) << est->interval);
2162 add_timer(&est->timer);
2163
2164 return est;
2165 }
2166
2167 static int
2168 idt77252_init_cbr(struct idt77252_dev *card, struct vc_map *vc,
2169 struct atm_vcc *vcc, struct atm_qos *qos)
2170 {
2171 int tst_free, tst_used, tst_entries;
2172 unsigned long tmpl, modl;
2173 int tcr, tcra;
2174
2175 if ((qos->txtp.max_pcr == 0) &&
2176 (qos->txtp.pcr == 0) && (qos->txtp.min_pcr == 0)) {
2177 printk("%s: trying to open a CBR VC with cell rate = 0\n",
2178 card->name);
2179 return -EINVAL;
2180 }
2181
2182 tst_used = 0;
2183 tst_free = card->tst_free;
2184 if (test_bit(VCF_TX, &vc->flags))
2185 tst_used = vc->ntste;
2186 tst_free += tst_used;
2187
2188 tcr = atm_pcr_goal(&qos->txtp);
2189 tcra = tcr >= 0 ? tcr : -tcr;
2190
2191 TXPRINTK("%s: CBR target cell rate = %d\n", card->name, tcra);
2192
2193 tmpl = (unsigned long) tcra * ((unsigned long) card->tst_size - 2);
2194 modl = tmpl % (unsigned long)card->utopia_pcr;
2195
2196 tst_entries = (int) (tmpl / card->utopia_pcr);
2197 if (tcr > 0) {
2198 if (modl > 0)
2199 tst_entries++;
2200 } else if (tcr == 0) {
2201 tst_entries = tst_free - SAR_TST_RESERVED;
2202 if (tst_entries <= 0) {
2203 printk("%s: no CBR bandwidth free.\n", card->name);
2204 return -ENOSR;
2205 }
2206 }
2207
2208 if (tst_entries == 0) {
2209 printk("%s: selected CBR bandwidth < granularity.\n",
2210 card->name);
2211 return -EINVAL;
2212 }
2213
2214 if (tst_entries > (tst_free - SAR_TST_RESERVED)) {
2215 printk("%s: not enough CBR bandwidth free.\n", card->name);
2216 return -ENOSR;
2217 }
2218
2219 vc->ntste = tst_entries;
2220
2221 card->tst_free = tst_free - tst_entries;
2222 if (test_bit(VCF_TX, &vc->flags)) {
2223 if (tst_used == tst_entries)
2224 return 0;
2225
2226 OPRINTK("%s: modify %d -> %d entries in TST.\n",
2227 card->name, tst_used, tst_entries);
2228 change_tst(card, vc, tst_entries, TSTE_OPC_CBR);
2229 return 0;
2230 }
2231
2232 OPRINTK("%s: setting %d entries in TST.\n", card->name, tst_entries);
2233 fill_tst(card, vc, tst_entries, TSTE_OPC_CBR);
2234 return 0;
2235 }
2236
2237 static int
2238 idt77252_init_ubr(struct idt77252_dev *card, struct vc_map *vc,
2239 struct atm_vcc *vcc, struct atm_qos *qos)
2240 {
2241 unsigned long flags;
2242 int tcr;
2243
2244 spin_lock_irqsave(&vc->lock, flags);
2245 if (vc->estimator) {
2246 del_timer(&vc->estimator->timer);
2247 kfree(vc->estimator);
2248 vc->estimator = NULL;
2249 }
2250 spin_unlock_irqrestore(&vc->lock, flags);
2251
2252 tcr = atm_pcr_goal(&qos->txtp);
2253 if (tcr == 0)
2254 tcr = card->link_pcr;
2255
2256 vc->estimator = idt77252_init_est(vc, tcr);
2257
2258 vc->class = SCHED_UBR;
2259 vc->init_er = idt77252_rate_logindex(card, tcr);
2260 vc->lacr = vc->init_er;
2261 if (tcr < 0)
2262 vc->max_er = vc->init_er;
2263 else
2264 vc->max_er = 0xff;
2265
2266 return 0;
2267 }
2268
2269 static int
2270 idt77252_init_tx(struct idt77252_dev *card, struct vc_map *vc,
2271 struct atm_vcc *vcc, struct atm_qos *qos)
2272 {
2273 int error;
2274
2275 if (test_bit(VCF_TX, &vc->flags))
2276 return -EBUSY;
2277
2278 switch (qos->txtp.traffic_class) {
2279 case ATM_CBR:
2280 vc->class = SCHED_CBR;
2281 break;
2282
2283 case ATM_UBR:
2284 vc->class = SCHED_UBR;
2285 break;
2286
2287 case ATM_VBR:
2288 case ATM_ABR:
2289 default:
2290 return -EPROTONOSUPPORT;
2291 }
2292
2293 vc->scq = alloc_scq(card, vc->class);
2294 if (!vc->scq) {
2295 printk("%s: can't get SCQ.\n", card->name);
2296 return -ENOMEM;
2297 }
2298
2299 vc->scq->scd = get_free_scd(card, vc);
2300 if (vc->scq->scd == 0) {
2301 printk("%s: no SCD available.\n", card->name);
2302 free_scq(card, vc->scq);
2303 return -ENOMEM;
2304 }
2305
2306 fill_scd(card, vc->scq, vc->class);
2307
2308 if (set_tct(card, vc)) {
2309 printk("%s: class %d not supported.\n",
2310 card->name, qos->txtp.traffic_class);
2311
2312 card->scd2vc[vc->scd_index] = NULL;
2313 free_scq(card, vc->scq);
2314 return -EPROTONOSUPPORT;
2315 }
2316
2317 switch (vc->class) {
2318 case SCHED_CBR:
2319 error = idt77252_init_cbr(card, vc, vcc, qos);
2320 if (error) {
2321 card->scd2vc[vc->scd_index] = NULL;
2322 free_scq(card, vc->scq);
2323 return error;
2324 }
2325
2326 clear_bit(VCF_IDLE, &vc->flags);
2327 writel(TCMDQ_START | vc->index, SAR_REG_TCMDQ);
2328 break;
2329
2330 case SCHED_UBR:
2331 error = idt77252_init_ubr(card, vc, vcc, qos);
2332 if (error) {
2333 card->scd2vc[vc->scd_index] = NULL;
2334 free_scq(card, vc->scq);
2335 return error;
2336 }
2337
2338 set_bit(VCF_IDLE, &vc->flags);
2339 break;
2340 }
2341
2342 vc->tx_vcc = vcc;
2343 set_bit(VCF_TX, &vc->flags);
2344 return 0;
2345 }
2346
2347 static int
2348 idt77252_init_rx(struct idt77252_dev *card, struct vc_map *vc,
2349 struct atm_vcc *vcc, struct atm_qos *qos)
2350 {
2351 unsigned long flags;
2352 unsigned long addr;
2353 u32 rcte = 0;
2354
2355 if (test_bit(VCF_RX, &vc->flags))
2356 return -EBUSY;
2357
2358 vc->rx_vcc = vcc;
2359 set_bit(VCF_RX, &vc->flags);
2360
2361 if ((vcc->vci == 3) || (vcc->vci == 4))
2362 return 0;
2363
2364 flush_rx_pool(card, &vc->rcv.rx_pool);
2365
2366 rcte |= SAR_RCTE_CONNECTOPEN;
2367 rcte |= SAR_RCTE_RAWCELLINTEN;
2368
2369 switch (qos->aal) {
2370 case ATM_AAL0:
2371 rcte |= SAR_RCTE_RCQ;
2372 break;
2373 case ATM_AAL1:
2374 rcte |= SAR_RCTE_OAM; /* Let SAR drop Video */
2375 break;
2376 case ATM_AAL34:
2377 rcte |= SAR_RCTE_AAL34;
2378 break;
2379 case ATM_AAL5:
2380 rcte |= SAR_RCTE_AAL5;
2381 break;
2382 default:
2383 rcte |= SAR_RCTE_RCQ;
2384 break;
2385 }
2386
2387 if (qos->aal != ATM_AAL5)
2388 rcte |= SAR_RCTE_FBP_1;
2389 else if (qos->rxtp.max_sdu > SAR_FB_SIZE_2)
2390 rcte |= SAR_RCTE_FBP_3;
2391 else if (qos->rxtp.max_sdu > SAR_FB_SIZE_1)
2392 rcte |= SAR_RCTE_FBP_2;
2393 else if (qos->rxtp.max_sdu > SAR_FB_SIZE_0)
2394 rcte |= SAR_RCTE_FBP_1;
2395 else
2396 rcte |= SAR_RCTE_FBP_01;
2397
2398 addr = card->rct_base + (vc->index << 2);
2399
2400 OPRINTK("%s: writing RCT at 0x%lx\n", card->name, addr);
2401 write_sram(card, addr, rcte);
2402
2403 spin_lock_irqsave(&card->cmd_lock, flags);
2404 writel(SAR_CMD_OPEN_CONNECTION | (addr << 2), SAR_REG_CMD);
2405 waitfor_idle(card);
2406 spin_unlock_irqrestore(&card->cmd_lock, flags);
2407
2408 return 0;
2409 }
2410
2411 static int
2412 idt77252_open(struct atm_vcc *vcc)
2413 {
2414 struct atm_dev *dev = vcc->dev;
2415 struct idt77252_dev *card = dev->dev_data;
2416 struct vc_map *vc;
2417 unsigned int index;
2418 unsigned int inuse;
2419 int error;
2420 int vci = vcc->vci;
2421 short vpi = vcc->vpi;
2422
2423 if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC)
2424 return 0;
2425
2426 if (vpi >= (1 << card->vpibits)) {
2427 printk("%s: unsupported VPI: %d\n", card->name, vpi);
2428 return -EINVAL;
2429 }
2430
2431 if (vci >= (1 << card->vcibits)) {
2432 printk("%s: unsupported VCI: %d\n", card->name, vci);
2433 return -EINVAL;
2434 }
2435
2436 set_bit(ATM_VF_ADDR, &vcc->flags);
2437
2438 down(&card->mutex);
2439
2440 OPRINTK("%s: opening vpi.vci: %d.%d\n", card->name, vpi, vci);
2441
2442 switch (vcc->qos.aal) {
2443 case ATM_AAL0:
2444 case ATM_AAL1:
2445 case ATM_AAL5:
2446 break;
2447 default:
2448 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal);
2449 up(&card->mutex);
2450 return -EPROTONOSUPPORT;
2451 }
2452
2453 index = VPCI2VC(card, vpi, vci);
2454 if (!card->vcs[index]) {
2455 card->vcs[index] = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2456 if (!card->vcs[index]) {
2457 printk("%s: can't alloc vc in open()\n", card->name);
2458 up(&card->mutex);
2459 return -ENOMEM;
2460 }
2461 card->vcs[index]->card = card;
2462 card->vcs[index]->index = index;
2463
2464 spin_lock_init(&card->vcs[index]->lock);
2465 }
2466 vc = card->vcs[index];
2467
2468 vcc->dev_data = vc;
2469
2470 IPRINTK("%s: idt77252_open: vc = %d (%d.%d) %s/%s (max RX SDU: %u)\n",
2471 card->name, vc->index, vcc->vpi, vcc->vci,
2472 vcc->qos.rxtp.traffic_class != ATM_NONE ? "rx" : "--",
2473 vcc->qos.txtp.traffic_class != ATM_NONE ? "tx" : "--",
2474 vcc->qos.rxtp.max_sdu);
2475
2476 inuse = 0;
2477 if (vcc->qos.txtp.traffic_class != ATM_NONE &&
2478 test_bit(VCF_TX, &vc->flags))
2479 inuse = 1;
2480 if (vcc->qos.rxtp.traffic_class != ATM_NONE &&
2481 test_bit(VCF_RX, &vc->flags))
2482 inuse += 2;
2483
2484 if (inuse) {
2485 printk("%s: %s vci already in use.\n", card->name,
2486 inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx");
2487 up(&card->mutex);
2488 return -EADDRINUSE;
2489 }
2490
2491 if (vcc->qos.txtp.traffic_class != ATM_NONE) {
2492 error = idt77252_init_tx(card, vc, vcc, &vcc->qos);
2493 if (error) {
2494 up(&card->mutex);
2495 return error;
2496 }
2497 }
2498
2499 if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
2500 error = idt77252_init_rx(card, vc, vcc, &vcc->qos);
2501 if (error) {
2502 up(&card->mutex);
2503 return error;
2504 }
2505 }
2506
2507 set_bit(ATM_VF_READY, &vcc->flags);
2508
2509 up(&card->mutex);
2510 return 0;
2511 }
2512
2513 static void
2514 idt77252_close(struct atm_vcc *vcc)
2515 {
2516 struct atm_dev *dev = vcc->dev;
2517 struct idt77252_dev *card = dev->dev_data;
2518 struct vc_map *vc = vcc->dev_data;
2519 unsigned long flags;
2520 unsigned long addr;
2521 unsigned long timeout;
2522
2523 down(&card->mutex);
2524
2525 IPRINTK("%s: idt77252_close: vc = %d (%d.%d)\n",
2526 card->name, vc->index, vcc->vpi, vcc->vci);
2527
2528 clear_bit(ATM_VF_READY, &vcc->flags);
2529
2530 if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
2531
2532 spin_lock_irqsave(&vc->lock, flags);
2533 clear_bit(VCF_RX, &vc->flags);
2534 vc->rx_vcc = NULL;
2535 spin_unlock_irqrestore(&vc->lock, flags);
2536
2537 if ((vcc->vci == 3) || (vcc->vci == 4))
2538 goto done;
2539
2540 addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE;
2541
2542 spin_lock_irqsave(&card->cmd_lock, flags);
2543 writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2), SAR_REG_CMD);
2544 waitfor_idle(card);
2545 spin_unlock_irqrestore(&card->cmd_lock, flags);
2546
2547 if (vc->rcv.rx_pool.count) {
2548 DPRINTK("%s: closing a VC with pending rx buffers.\n",
2549 card->name);
2550
2551 recycle_rx_pool_skb(card, &vc->rcv.rx_pool);
2552 }
2553 }
2554
2555 done:
2556 if (vcc->qos.txtp.traffic_class != ATM_NONE) {
2557
2558 spin_lock_irqsave(&vc->lock, flags);
2559 clear_bit(VCF_TX, &vc->flags);
2560 clear_bit(VCF_IDLE, &vc->flags);
2561 clear_bit(VCF_RSV, &vc->flags);
2562 vc->tx_vcc = NULL;
2563
2564 if (vc->estimator) {
2565 del_timer(&vc->estimator->timer);
2566 kfree(vc->estimator);
2567 vc->estimator = NULL;
2568 }
2569 spin_unlock_irqrestore(&vc->lock, flags);
2570
2571 timeout = 5 * 1000;
2572 while (atomic_read(&vc->scq->used) > 0) {
2573 timeout = msleep_interruptible(timeout);
2574 if (!timeout)
2575 break;
2576 }
2577 if (!timeout)
2578 printk("%s: SCQ drain timeout: %u used\n",
2579 card->name, atomic_read(&vc->scq->used));
2580
2581 writel(TCMDQ_HALT | vc->index, SAR_REG_TCMDQ);
2582 clear_scd(card, vc->scq, vc->class);
2583
2584 if (vc->class == SCHED_CBR) {
2585 clear_tst(card, vc);
2586 card->tst_free += vc->ntste;
2587 vc->ntste = 0;
2588 }
2589
2590 card->scd2vc[vc->scd_index] = NULL;
2591 free_scq(card, vc->scq);
2592 }
2593
2594 up(&card->mutex);
2595 }
2596
2597 static int
2598 idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos, int flags)
2599 {
2600 struct atm_dev *dev = vcc->dev;
2601 struct idt77252_dev *card = dev->dev_data;
2602 struct vc_map *vc = vcc->dev_data;
2603 int error = 0;
2604
2605 down(&card->mutex);
2606
2607 if (qos->txtp.traffic_class != ATM_NONE) {
2608 if (!test_bit(VCF_TX, &vc->flags)) {
2609 error = idt77252_init_tx(card, vc, vcc, qos);
2610 if (error)
2611 goto out;
2612 } else {
2613 switch (qos->txtp.traffic_class) {
2614 case ATM_CBR:
2615 error = idt77252_init_cbr(card, vc, vcc, qos);
2616 if (error)
2617 goto out;
2618 break;
2619
2620 case ATM_UBR:
2621 error = idt77252_init_ubr(card, vc, vcc, qos);
2622 if (error)
2623 goto out;
2624
2625 if (!test_bit(VCF_IDLE, &vc->flags)) {
2626 writel(TCMDQ_LACR | (vc->lacr << 16) |
2627 vc->index, SAR_REG_TCMDQ);
2628 }
2629 break;
2630
2631 case ATM_VBR:
2632 case ATM_ABR:
2633 error = -EOPNOTSUPP;
2634 goto out;
2635 }
2636 }
2637 }
2638
2639 if ((qos->rxtp.traffic_class != ATM_NONE) &&
2640 !test_bit(VCF_RX, &vc->flags)) {
2641 error = idt77252_init_rx(card, vc, vcc, qos);
2642 if (error)
2643 goto out;
2644 }
2645
2646 memcpy(&vcc->qos, qos, sizeof(struct atm_qos));
2647
2648 set_bit(ATM_VF_HASQOS, &vcc->flags);
2649
2650 out:
2651 up(&card->mutex);
2652 return error;
2653 }
2654
2655 static int
2656 idt77252_proc_read(struct atm_dev *dev, loff_t * pos, char *page)
2657 {
2658 struct idt77252_dev *card = dev->dev_data;
2659 int i, left;
2660
2661 left = (int) *pos;
2662 if (!left--)
2663 return sprintf(page, "IDT77252 Interrupts:\n");
2664 if (!left--)
2665 return sprintf(page, "TSIF: %lu\n", card->irqstat[15]);
2666 if (!left--)
2667 return sprintf(page, "TXICP: %lu\n", card->irqstat[14]);
2668 if (!left--)
2669 return sprintf(page, "TSQF: %lu\n", card->irqstat[12]);
2670 if (!left--)
2671 return sprintf(page, "TMROF: %lu\n", card->irqstat[11]);
2672 if (!left--)
2673 return sprintf(page, "PHYI: %lu\n", card->irqstat[10]);
2674 if (!left--)
2675 return sprintf(page, "FBQ3A: %lu\n", card->irqstat[8]);
2676 if (!left--)
2677 return sprintf(page, "FBQ2A: %lu\n", card->irqstat[7]);
2678 if (!left--)
2679 return sprintf(page, "RSQF: %lu\n", card->irqstat[6]);
2680 if (!left--)
2681 return sprintf(page, "EPDU: %lu\n", card->irqstat[5]);
2682 if (!left--)
2683 return sprintf(page, "RAWCF: %lu\n", card->irqstat[4]);
2684 if (!left--)
2685 return sprintf(page, "FBQ1A: %lu\n", card->irqstat[3]);
2686 if (!left--)
2687 return sprintf(page, "FBQ0A: %lu\n", card->irqstat[2]);
2688 if (!left--)
2689 return sprintf(page, "RSQAF: %lu\n", card->irqstat[1]);
2690 if (!left--)
2691 return sprintf(page, "IDT77252 Transmit Connection Table:\n");
2692
2693 for (i = 0; i < card->tct_size; i++) {
2694 unsigned long tct;
2695 struct atm_vcc *vcc;
2696 struct vc_map *vc;
2697 char *p;
2698
2699 vc = card->vcs[i];
2700 if (!vc)
2701 continue;
2702
2703 vcc = NULL;
2704 if (vc->tx_vcc)
2705 vcc = vc->tx_vcc;
2706 if (!vcc)
2707 continue;
2708 if (left--)
2709 continue;
2710
2711 p = page;
2712 p += sprintf(p, " %4u: %u.%u: ", i, vcc->vpi, vcc->vci);
2713 tct = (unsigned long) (card->tct_base + i * SAR_SRAM_TCT_SIZE);
2714
2715 for (i = 0; i < 8; i++)
2716 p += sprintf(p, " %08x", read_sram(card, tct + i));
2717 p += sprintf(p, "\n");
2718 return p - page;
2719 }
2720 return 0;
2721 }
2722
2723 /*****************************************************************************/
2724 /* */
2725 /* Interrupt handler */
2726 /* */
2727 /*****************************************************************************/
2728
2729 static void
2730 idt77252_collect_stat(struct idt77252_dev *card)
2731 {
2732 u32 cdc, vpec, icc;
2733
2734 cdc = readl(SAR_REG_CDC);
2735 vpec = readl(SAR_REG_VPEC);
2736 icc = readl(SAR_REG_ICC);
2737
2738 #ifdef NOTDEF
2739 printk("%s:", card->name);
2740
2741 if (cdc & 0x7f0000) {
2742 char *s = "";
2743
2744 printk(" [");
2745 if (cdc & (1 << 22)) {
2746 printk("%sRM ID", s);
2747 s = " | ";
2748 }
2749 if (cdc & (1 << 21)) {
2750 printk("%sCON TAB", s);
2751 s = " | ";
2752 }
2753 if (cdc & (1 << 20)) {
2754 printk("%sNO FB", s);
2755 s = " | ";
2756 }
2757 if (cdc & (1 << 19)) {
2758 printk("%sOAM CRC", s);
2759 s = " | ";
2760 }
2761 if (cdc & (1 << 18)) {
2762 printk("%sRM CRC", s);
2763 s = " | ";
2764 }
2765 if (cdc & (1 << 17)) {
2766 printk("%sRM FIFO", s);
2767 s = " | ";
2768 }
2769 if (cdc & (1 << 16)) {
2770 printk("%sRX FIFO", s);
2771 s = " | ";
2772 }
2773 printk("]");
2774 }
2775
2776 printk(" CDC %04x, VPEC %04x, ICC: %04x\n",
2777 cdc & 0xffff, vpec & 0xffff, icc & 0xffff);
2778 #endif
2779 }
2780
2781 static irqreturn_t
2782 idt77252_interrupt(int irq, void *dev_id)
2783 {
2784 struct idt77252_dev *card = dev_id;
2785 u32 stat;
2786
2787 stat = readl(SAR_REG_STAT) & 0xffff;
2788 if (!stat) /* no interrupt for us */
2789 return IRQ_NONE;
2790
2791 if (test_and_set_bit(IDT77252_BIT_INTERRUPT, &card->flags)) {
2792 printk("%s: Re-entering irq_handler()\n", card->name);
2793 goto out;
2794 }
2795
2796 writel(stat, SAR_REG_STAT); /* reset interrupt */
2797
2798 if (stat & SAR_STAT_TSIF) { /* entry written to TSQ */
2799 INTPRINTK("%s: TSIF\n", card->name);
2800 card->irqstat[15]++;
2801 idt77252_tx(card);
2802 }
2803 if (stat & SAR_STAT_TXICP) { /* Incomplete CS-PDU has */
2804 INTPRINTK("%s: TXICP\n", card->name);
2805 card->irqstat[14]++;
2806 #ifdef CONFIG_ATM_IDT77252_DEBUG
2807 idt77252_tx_dump(card);
2808 #endif
2809 }
2810 if (stat & SAR_STAT_TSQF) { /* TSQ 7/8 full */
2811 INTPRINTK("%s: TSQF\n", card->name);
2812 card->irqstat[12]++;
2813 idt77252_tx(card);
2814 }
2815 if (stat & SAR_STAT_TMROF) { /* Timer overflow */
2816 INTPRINTK("%s: TMROF\n", card->name);
2817 card->irqstat[11]++;
2818 idt77252_collect_stat(card);
2819 }
2820
2821 if (stat & SAR_STAT_EPDU) { /* Got complete CS-PDU */
2822 INTPRINTK("%s: EPDU\n", card->name);
2823 card->irqstat[5]++;
2824 idt77252_rx(card);
2825 }
2826 if (stat & SAR_STAT_RSQAF) { /* RSQ is 7/8 full */
2827 INTPRINTK("%s: RSQAF\n", card->name);
2828 card->irqstat[1]++;
2829 idt77252_rx(card);
2830 }
2831 if (stat & SAR_STAT_RSQF) { /* RSQ is full */
2832 INTPRINTK("%s: RSQF\n", card->name);
2833 card->irqstat[6]++;
2834 idt77252_rx(card);
2835 }
2836 if (stat & SAR_STAT_RAWCF) { /* Raw cell received */
2837 INTPRINTK("%s: RAWCF\n", card->name);
2838 card->irqstat[4]++;
2839 idt77252_rx_raw(card);
2840 }
2841
2842 if (stat & SAR_STAT_PHYI) { /* PHY device interrupt */
2843 INTPRINTK("%s: PHYI", card->name);
2844 card->irqstat[10]++;
2845 if (card->atmdev->phy && card->atmdev->phy->interrupt)
2846 card->atmdev->phy->interrupt(card->atmdev);
2847 }
2848
2849 if (stat & (SAR_STAT_FBQ0A | SAR_STAT_FBQ1A |
2850 SAR_STAT_FBQ2A | SAR_STAT_FBQ3A)) {
2851
2852 writel(readl(SAR_REG_CFG) & ~(SAR_CFG_FBIE), SAR_REG_CFG);
2853
2854 INTPRINTK("%s: FBQA: %04x\n", card->name, stat);
2855
2856 if (stat & SAR_STAT_FBQ0A)
2857 card->irqstat[2]++;
2858 if (stat & SAR_STAT_FBQ1A)
2859 card->irqstat[3]++;
2860 if (stat & SAR_STAT_FBQ2A)
2861 card->irqstat[7]++;
2862 if (stat & SAR_STAT_FBQ3A)
2863 card->irqstat[8]++;
2864
2865 schedule_work(&card->tqueue);
2866 }
2867
2868 out:
2869 clear_bit(IDT77252_BIT_INTERRUPT, &card->flags);
2870 return IRQ_HANDLED;
2871 }
2872
2873 static void
2874 idt77252_softint(struct work_struct *work)
2875 {
2876 struct idt77252_dev *card =
2877 container_of(work, struct idt77252_dev, tqueue);
2878 u32 stat;
2879 int done;
2880
2881 for (done = 1; ; done = 1) {
2882 stat = readl(SAR_REG_STAT) >> 16;
2883
2884 if ((stat & 0x0f) < SAR_FBQ0_HIGH) {
2885 add_rx_skb(card, 0, SAR_FB_SIZE_0, 32);
2886 done = 0;
2887 }
2888
2889 stat >>= 4;
2890 if ((stat & 0x0f) < SAR_FBQ1_HIGH) {
2891 add_rx_skb(card, 1, SAR_FB_SIZE_1, 32);
2892 done = 0;
2893 }
2894
2895 stat >>= 4;
2896 if ((stat & 0x0f) < SAR_FBQ2_HIGH) {
2897 add_rx_skb(card, 2, SAR_FB_SIZE_2, 32);
2898 done = 0;
2899 }
2900
2901 stat >>= 4;
2902 if ((stat & 0x0f) < SAR_FBQ3_HIGH) {
2903 add_rx_skb(card, 3, SAR_FB_SIZE_3, 32);
2904 done = 0;
2905 }
2906
2907 if (done)
2908 break;
2909 }
2910
2911 writel(readl(SAR_REG_CFG) | SAR_CFG_FBIE, SAR_REG_CFG);
2912 }
2913
2914
2915 static int
2916 open_card_oam(struct idt77252_dev *card)
2917 {
2918 unsigned long flags;
2919 unsigned long addr;
2920 struct vc_map *vc;
2921 int vpi, vci;
2922 int index;
2923 u32 rcte;
2924
2925 for (vpi = 0; vpi < (1 << card->vpibits); vpi++) {
2926 for (vci = 3; vci < 5; vci++) {
2927 index = VPCI2VC(card, vpi, vci);
2928
2929 vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2930 if (!vc) {
2931 printk("%s: can't alloc vc\n", card->name);
2932 return -ENOMEM;
2933 }
2934 vc->index = index;
2935 card->vcs[index] = vc;
2936
2937 flush_rx_pool(card, &vc->rcv.rx_pool);
2938
2939 rcte = SAR_RCTE_CONNECTOPEN |
2940 SAR_RCTE_RAWCELLINTEN |
2941 SAR_RCTE_RCQ |
2942 SAR_RCTE_FBP_1;
2943
2944 addr = card->rct_base + (vc->index << 2);
2945 write_sram(card, addr, rcte);
2946
2947 spin_lock_irqsave(&card->cmd_lock, flags);
2948 writel(SAR_CMD_OPEN_CONNECTION | (addr << 2),
2949 SAR_REG_CMD);
2950 waitfor_idle(card);
2951 spin_unlock_irqrestore(&card->cmd_lock, flags);
2952 }
2953 }
2954
2955 return 0;
2956 }
2957
2958 static void
2959 close_card_oam(struct idt77252_dev *card)
2960 {
2961 unsigned long flags;
2962 unsigned long addr;
2963 struct vc_map *vc;
2964 int vpi, vci;
2965 int index;
2966
2967 for (vpi = 0; vpi < (1 << card->vpibits); vpi++) {
2968 for (vci = 3; vci < 5; vci++) {
2969 index = VPCI2VC(card, vpi, vci);
2970 vc = card->vcs[index];
2971
2972 addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE;
2973
2974 spin_lock_irqsave(&card->cmd_lock, flags);
2975 writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2),
2976 SAR_REG_CMD);
2977 waitfor_idle(card);
2978 spin_unlock_irqrestore(&card->cmd_lock, flags);
2979
2980 if (vc->rcv.rx_pool.count) {
2981 DPRINTK("%s: closing a VC "
2982 "with pending rx buffers.\n",
2983 card->name);
2984
2985 recycle_rx_pool_skb(card, &vc->rcv.rx_pool);
2986 }
2987 }
2988 }
2989 }
2990
2991 static int
2992 open_card_ubr0(struct idt77252_dev *card)
2993 {
2994 struct vc_map *vc;
2995
2996 vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2997 if (!vc) {
2998 printk("%s: can't alloc vc\n", card->name);
2999 return -ENOMEM;
3000 }
3001 card->vcs[0] = vc;
3002 vc->class = SCHED_UBR0;
3003
3004 vc->scq = alloc_scq(card, vc->class);
3005 if (!vc->scq) {
3006 printk("%s: can't get SCQ.\n", card->name);
3007 return -ENOMEM;
3008 }
3009
3010 card->scd2vc[0] = vc;
3011 vc->scd_index = 0;
3012 vc->scq->scd = card->scd_base;
3013
3014 fill_scd(card, vc->scq, vc->class);
3015
3016 write_sram(card, card->tct_base + 0, TCT_UBR | card->scd_base);
3017 write_sram(card, card->tct_base + 1, 0);
3018 write_sram(card, card->tct_base + 2, 0);
3019 write_sram(card, card->tct_base + 3, 0);
3020 write_sram(card, card->tct_base + 4, 0);
3021 write_sram(card, card->tct_base + 5, 0);
3022 write_sram(card, card->tct_base + 6, 0);
3023 write_sram(card, card->tct_base + 7, TCT_FLAG_UBR);
3024
3025 clear_bit(VCF_IDLE, &vc->flags);
3026 writel(TCMDQ_START | 0, SAR_REG_TCMDQ);
3027 return 0;
3028 }
3029
3030 static int
3031 idt77252_dev_open(struct idt77252_dev *card)
3032 {
3033 u32 conf;
3034
3035 if (!test_bit(IDT77252_BIT_INIT, &card->flags)) {
3036 printk("%s: SAR not yet initialized.\n", card->name);
3037 return -1;
3038 }
3039
3040 conf = SAR_CFG_RXPTH| /* enable receive path */
3041 SAR_RX_DELAY | /* interrupt on complete PDU */
3042 SAR_CFG_RAWIE | /* interrupt enable on raw cells */
3043 SAR_CFG_RQFIE | /* interrupt on RSQ almost full */
3044 SAR_CFG_TMOIE | /* interrupt on timer overflow */
3045 SAR_CFG_FBIE | /* interrupt on low free buffers */
3046 SAR_CFG_TXEN | /* transmit operation enable */
3047 SAR_CFG_TXINT | /* interrupt on transmit status */
3048 SAR_CFG_TXUIE | /* interrupt on transmit underrun */
3049 SAR_CFG_TXSFI | /* interrupt on TSQ almost full */
3050 SAR_CFG_PHYIE /* enable PHY interrupts */
3051 ;
3052
3053 #ifdef CONFIG_ATM_IDT77252_RCV_ALL
3054 /* Test RAW cell receive. */
3055 conf |= SAR_CFG_VPECA;
3056 #endif
3057
3058 writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG);
3059
3060 if (open_card_oam(card)) {
3061 printk("%s: Error initializing OAM.\n", card->name);
3062 return -1;
3063 }
3064
3065 if (open_card_ubr0(card)) {
3066 printk("%s: Error initializing UBR0.\n", card->name);
3067 return -1;
3068 }
3069
3070 IPRINTK("%s: opened IDT77252 ABR SAR.\n", card->name);
3071 return 0;
3072 }
3073
3074 void
3075 idt77252_dev_close(struct atm_dev *dev)
3076 {
3077 struct idt77252_dev *card = dev->dev_data;
3078 u32 conf;
3079
3080 close_card_oam(card);
3081
3082 conf = SAR_CFG_RXPTH | /* enable receive path */
3083 SAR_RX_DELAY | /* interrupt on complete PDU */
3084 SAR_CFG_RAWIE | /* interrupt enable on raw cells */
3085 SAR_CFG_RQFIE | /* interrupt on RSQ almost full */
3086 SAR_CFG_TMOIE | /* interrupt on timer overflow */
3087 SAR_CFG_FBIE | /* interrupt on low free buffers */
3088 SAR_CFG_TXEN | /* transmit operation enable */
3089 SAR_CFG_TXINT | /* interrupt on transmit status */
3090 SAR_CFG_TXUIE | /* interrupt on xmit underrun */
3091 SAR_CFG_TXSFI /* interrupt on TSQ almost full */
3092 ;
3093
3094 writel(readl(SAR_REG_CFG) & ~(conf), SAR_REG_CFG);
3095
3096 DIPRINTK("%s: closed IDT77252 ABR SAR.\n", card->name);
3097 }
3098
3099
3100 /*****************************************************************************/
3101 /* */
3102 /* Initialisation and Deinitialization of IDT77252 */
3103 /* */
3104 /*****************************************************************************/
3105
3106
3107 static void
3108 deinit_card(struct idt77252_dev *card)
3109 {
3110 struct sk_buff *skb;
3111 int i, j;
3112
3113 if (!test_bit(IDT77252_BIT_INIT, &card->flags)) {
3114 printk("%s: SAR not yet initialized.\n", card->name);
3115 return;
3116 }
3117 DIPRINTK("idt77252: deinitialize card %u\n", card->index);
3118
3119 writel(0, SAR_REG_CFG);
3120
3121 if (card->atmdev)
3122 atm_dev_deregister(card->atmdev);
3123
3124 for (i = 0; i < 4; i++) {
3125 for (j = 0; j < FBQ_SIZE; j++) {
3126 skb = card->sbpool[i].skb[j];
3127 if (skb) {
3128 pci_unmap_single(card->pcidev,
3129 IDT77252_PRV_PADDR(skb),
3130 (skb_end_pointer(skb) -
3131 skb->data),
3132 PCI_DMA_FROMDEVICE);
3133 card->sbpool[i].skb[j] = NULL;
3134 dev_kfree_skb(skb);
3135 }
3136 }
3137 }
3138
3139 vfree(card->soft_tst);
3140
3141 vfree(card->scd2vc);
3142
3143 vfree(card->vcs);
3144
3145 if (card->raw_cell_hnd) {
3146 pci_free_consistent(card->pcidev, 2 * sizeof(u32),
3147 card->raw_cell_hnd, card->raw_cell_paddr);
3148 }
3149
3150 if (card->rsq.base) {
3151 DIPRINTK("%s: Release RSQ ...\n", card->name);
3152 deinit_rsq(card);
3153 }
3154
3155 if (card->tsq.base) {
3156 DIPRINTK("%s: Release TSQ ...\n", card->name);
3157 deinit_tsq(card);
3158 }
3159
3160 DIPRINTK("idt77252: Release IRQ.\n");
3161 free_irq(card->pcidev->irq, card);
3162
3163 for (i = 0; i < 4; i++) {
3164 if (card->fbq[i])
3165 iounmap(card->fbq[i]);
3166 }
3167
3168 if (card->membase)
3169 iounmap(card->membase);
3170
3171 clear_bit(IDT77252_BIT_INIT, &card->flags);
3172 DIPRINTK("%s: Card deinitialized.\n", card->name);
3173 }
3174
3175
3176 static int __devinit
3177 init_sram(struct idt77252_dev *card)
3178 {
3179 int i;
3180
3181 for (i = 0; i < card->sramsize; i += 4)
3182 write_sram(card, (i >> 2), 0);
3183
3184 /* set SRAM layout for THIS card */
3185 if (card->sramsize == (512 * 1024)) {
3186 card->tct_base = SAR_SRAM_TCT_128_BASE;
3187 card->tct_size = (SAR_SRAM_TCT_128_TOP - card->tct_base + 1)
3188 / SAR_SRAM_TCT_SIZE;
3189 card->rct_base = SAR_SRAM_RCT_128_BASE;
3190 card->rct_size = (SAR_SRAM_RCT_128_TOP - card->rct_base + 1)
3191 / SAR_SRAM_RCT_SIZE;
3192 card->rt_base = SAR_SRAM_RT_128_BASE;
3193 card->scd_base = SAR_SRAM_SCD_128_BASE;
3194 card->scd_size = (SAR_SRAM_SCD_128_TOP - card->scd_base + 1)
3195 / SAR_SRAM_SCD_SIZE;
3196 card->tst[0] = SAR_SRAM_TST1_128_BASE;
3197 card->tst[1] = SAR_SRAM_TST2_128_BASE;
3198 card->tst_size = SAR_SRAM_TST1_128_TOP - card->tst[0] + 1;
3199 card->abrst_base = SAR_SRAM_ABRSTD_128_BASE;
3200 card->abrst_size = SAR_ABRSTD_SIZE_8K;
3201 card->fifo_base = SAR_SRAM_FIFO_128_BASE;
3202 card->fifo_size = SAR_RXFD_SIZE_32K;
3203 } else {
3204 card->tct_base = SAR_SRAM_TCT_32_BASE;
3205 card->tct_size = (SAR_SRAM_TCT_32_TOP - card->tct_base + 1)
3206 / SAR_SRAM_TCT_SIZE;
3207 card->rct_base = SAR_SRAM_RCT_32_BASE;
3208 card->rct_size = (SAR_SRAM_RCT_32_TOP - card->rct_base + 1)
3209 / SAR_SRAM_RCT_SIZE;
3210 card->rt_base = SAR_SRAM_RT_32_BASE;
3211 card->scd_base = SAR_SRAM_SCD_32_BASE;
3212 card->scd_size = (SAR_SRAM_SCD_32_TOP - card->scd_base + 1)
3213 / SAR_SRAM_SCD_SIZE;
3214 card->tst[0] = SAR_SRAM_TST1_32_BASE;
3215 card->tst[1] = SAR_SRAM_TST2_32_BASE;
3216 card->tst_size = (SAR_SRAM_TST1_32_TOP - card->tst[0] + 1);
3217 card->abrst_base = SAR_SRAM_ABRSTD_32_BASE;
3218 card->abrst_size = SAR_ABRSTD_SIZE_1K;
3219 card->fifo_base = SAR_SRAM_FIFO_32_BASE;
3220 card->fifo_size = SAR_RXFD_SIZE_4K;
3221 }
3222
3223 /* Initialize TCT */
3224 for (i = 0; i < card->tct_size; i++) {
3225 write_sram(card, i * SAR_SRAM_TCT_SIZE + 0, 0);
3226 write_sram(card, i * SAR_SRAM_TCT_SIZE + 1, 0);
3227 write_sram(card, i * SAR_SRAM_TCT_SIZE + 2, 0);
3228 write_sram(card, i * SAR_SRAM_TCT_SIZE + 3, 0);
3229 write_sram(card, i * SAR_SRAM_TCT_SIZE + 4, 0);
3230 write_sram(card, i * SAR_SRAM_TCT_SIZE + 5, 0);
3231 write_sram(card, i * SAR_SRAM_TCT_SIZE + 6, 0);
3232 write_sram(card, i * SAR_SRAM_TCT_SIZE + 7, 0);
3233 }
3234
3235 /* Initialize RCT */
3236 for (i = 0; i < card->rct_size; i++) {
3237 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE,
3238 (u32) SAR_RCTE_RAWCELLINTEN);
3239 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 1,
3240 (u32) 0);
3241 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 2,
3242 (u32) 0);
3243 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 3,
3244 (u32) 0xffffffff);
3245 }
3246
3247 writel((SAR_FBQ0_LOW << 28) | 0x00000000 | 0x00000000 |
3248 (SAR_FB_SIZE_0 / 48), SAR_REG_FBQS0);
3249 writel((SAR_FBQ1_LOW << 28) | 0x00000000 | 0x00000000 |
3250 (SAR_FB_SIZE_1 / 48), SAR_REG_FBQS1);
3251 writel((SAR_FBQ2_LOW << 28) | 0x00000000 | 0x00000000 |
3252 (SAR_FB_SIZE_2 / 48), SAR_REG_FBQS2);
3253 writel((SAR_FBQ3_LOW << 28) | 0x00000000 | 0x00000000 |
3254 (SAR_FB_SIZE_3 / 48), SAR_REG_FBQS3);
3255
3256 /* Initialize rate table */
3257 for (i = 0; i < 256; i++) {
3258 write_sram(card, card->rt_base + i, log_to_rate[i]);
3259 }
3260
3261 for (i = 0; i < 128; i++) {
3262 unsigned int tmp;
3263
3264 tmp = rate_to_log[(i << 2) + 0] << 0;
3265 tmp |= rate_to_log[(i << 2) + 1] << 8;
3266 tmp |= rate_to_log[(i << 2) + 2] << 16;
3267 tmp |= rate_to_log[(i << 2) + 3] << 24;
3268 write_sram(card, card->rt_base + 256 + i, tmp);
3269 }
3270
3271 #if 0 /* Fill RDF and AIR tables. */
3272 for (i = 0; i < 128; i++) {
3273 unsigned int tmp;
3274
3275 tmp = RDF[0][(i << 1) + 0] << 16;
3276 tmp |= RDF[0][(i << 1) + 1] << 0;
3277 write_sram(card, card->rt_base + 512 + i, tmp);
3278 }
3279
3280 for (i = 0; i < 128; i++) {
3281 unsigned int tmp;
3282
3283 tmp = AIR[0][(i << 1) + 0] << 16;
3284 tmp |= AIR[0][(i << 1) + 1] << 0;
3285 write_sram(card, card->rt_base + 640 + i, tmp);
3286 }
3287 #endif
3288
3289 IPRINTK("%s: initialize rate table ...\n", card->name);
3290 writel(card->rt_base << 2, SAR_REG_RTBL);
3291
3292 /* Initialize TSTs */
3293 IPRINTK("%s: initialize TST ...\n", card->name);
3294 card->tst_free = card->tst_size - 2; /* last two are jumps */
3295
3296 for (i = card->tst[0]; i < card->tst[0] + card->tst_size - 2; i++)
3297 write_sram(card, i, TSTE_OPC_VAR);
3298 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2));
3299 idt77252_sram_write_errors = 1;
3300 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2));
3301 idt77252_sram_write_errors = 0;
3302 for (i = card->tst[1]; i < card->tst[1] + card->tst_size - 2; i++)
3303 write_sram(card, i, TSTE_OPC_VAR);
3304 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2));
3305 idt77252_sram_write_errors = 1;
3306 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2));
3307 idt77252_sram_write_errors = 0;
3308
3309 card->tst_index = 0;
3310 writel(card->tst[0] << 2, SAR_REG_TSTB);
3311
3312 /* Initialize ABRSTD and Receive FIFO */
3313 IPRINTK("%s: initialize ABRSTD ...\n", card->name);
3314 writel(card->abrst_size | (card->abrst_base << 2),
3315 SAR_REG_ABRSTD);
3316
3317 IPRINTK("%s: initialize receive fifo ...\n", card->name);
3318 writel(card->fifo_size | (card->fifo_base << 2),
3319 SAR_REG_RXFD);
3320
3321 IPRINTK("%s: SRAM initialization complete.\n", card->name);
3322 return 0;
3323 }
3324
3325 static int __devinit
3326 init_card(struct atm_dev *dev)
3327 {
3328 struct idt77252_dev *card = dev->dev_data;
3329 struct pci_dev *pcidev = card->pcidev;
3330 unsigned long tmpl, modl;
3331 unsigned int linkrate, rsvdcr;
3332 unsigned int tst_entries;
3333 struct net_device *tmp;
3334 char tname[10];
3335
3336 u32 size;
3337 u_char pci_byte;
3338 u32 conf;
3339 int i, k;
3340
3341 if (test_bit(IDT77252_BIT_INIT, &card->flags)) {
3342 printk("Error: SAR already initialized.\n");
3343 return -1;
3344 }
3345
3346 /*****************************************************************/
3347 /* P C I C O N F I G U R A T I O N */
3348 /*****************************************************************/
3349
3350 /* Set PCI Retry-Timeout and TRDY timeout */
3351 IPRINTK("%s: Checking PCI retries.\n", card->name);
3352 if (pci_read_config_byte(pcidev, 0x40, &pci_byte) != 0) {
3353 printk("%s: can't read PCI retry timeout.\n", card->name);
3354 deinit_card(card);
3355 return -1;
3356 }
3357 if (pci_byte != 0) {
3358 IPRINTK("%s: PCI retry timeout: %d, set to 0.\n",
3359 card->name, pci_byte);
3360 if (pci_write_config_byte(pcidev, 0x40, 0) != 0) {
3361 printk("%s: can't set PCI retry timeout.\n",
3362 card->name);
3363 deinit_card(card);
3364 return -1;
3365 }
3366 }
3367 IPRINTK("%s: Checking PCI TRDY.\n", card->name);
3368 if (pci_read_config_byte(pcidev, 0x41, &pci_byte) != 0) {
3369 printk("%s: can't read PCI TRDY timeout.\n", card->name);
3370 deinit_card(card);
3371 return -1;
3372 }
3373 if (pci_byte != 0) {
3374 IPRINTK("%s: PCI TRDY timeout: %d, set to 0.\n",
3375 card->name, pci_byte);
3376 if (pci_write_config_byte(pcidev, 0x41, 0) != 0) {
3377 printk("%s: can't set PCI TRDY timeout.\n", card->name);
3378 deinit_card(card);
3379 return -1;
3380 }
3381 }
3382 /* Reset Timer register */
3383 if (readl(SAR_REG_STAT) & SAR_STAT_TMROF) {
3384 printk("%s: resetting timer overflow.\n", card->name);
3385 writel(SAR_STAT_TMROF, SAR_REG_STAT);
3386 }
3387 IPRINTK("%s: Request IRQ ... ", card->name);
3388 if (request_irq(pcidev->irq, idt77252_interrupt, IRQF_DISABLED|IRQF_SHARED,
3389 card->name, card) != 0) {
3390 printk("%s: can't allocate IRQ.\n", card->name);
3391 deinit_card(card);
3392 return -1;
3393 }
3394 IPRINTK("got %d.\n", pcidev->irq);
3395
3396 /*****************************************************************/
3397 /* C H E C K A N D I N I T S R A M */
3398 /*****************************************************************/
3399
3400 IPRINTK("%s: Initializing SRAM\n", card->name);
3401
3402 /* preset size of connecton table, so that init_sram() knows about it */
3403 conf = SAR_CFG_TX_FIFO_SIZE_9 | /* Use maximum fifo size */
3404 SAR_CFG_RXSTQ_SIZE_8k | /* Receive Status Queue is 8k */
3405 SAR_CFG_IDLE_CLP | /* Set CLP on idle cells */
3406 #ifndef CONFIG_ATM_IDT77252_SEND_IDLE
3407 SAR_CFG_NO_IDLE | /* Do not send idle cells */
3408 #endif
3409 0;
3410
3411 if (card->sramsize == (512 * 1024))
3412 conf |= SAR_CFG_CNTBL_1k;
3413 else
3414 conf |= SAR_CFG_CNTBL_512;
3415
3416 switch (vpibits) {
3417 case 0:
3418 conf |= SAR_CFG_VPVCS_0;
3419 break;
3420 default:
3421 case 1:
3422 conf |= SAR_CFG_VPVCS_1;
3423 break;
3424 case 2:
3425 conf |= SAR_CFG_VPVCS_2;
3426 break;
3427 case 8:
3428 conf |= SAR_CFG_VPVCS_8;
3429 break;
3430 }
3431
3432 writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG);
3433
3434 if (init_sram(card) < 0)
3435 return -1;
3436
3437 /********************************************************************/
3438 /* 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 */
3439 /********************************************************************/
3440 /* Initialize TSQ */
3441 if (0 != init_tsq(card)) {
3442 deinit_card(card);
3443 return -1;
3444 }
3445 /* Initialize RSQ */
3446 if (0 != init_rsq(card)) {
3447 deinit_card(card);
3448 return -1;
3449 }
3450
3451 card->vpibits = vpibits;
3452 if (card->sramsize == (512 * 1024)) {
3453 card->vcibits = 10 - card->vpibits;
3454 } else {
3455 card->vcibits = 9 - card->vpibits;
3456 }
3457
3458 card->vcimask = 0;
3459 for (k = 0, i = 1; k < card->vcibits; k++) {
3460 card->vcimask |= i;
3461 i <<= 1;
3462 }
3463
3464 IPRINTK("%s: Setting VPI/VCI mask to zero.\n", card->name);
3465 writel(0, SAR_REG_VPM);
3466
3467 /* Little Endian Order */
3468 writel(0, SAR_REG_GP);
3469
3470 /* Initialize RAW Cell Handle Register */
3471 card->raw_cell_hnd = pci_alloc_consistent(card->pcidev, 2 * sizeof(u32),
3472 &card->raw_cell_paddr);
3473 if (!card->raw_cell_hnd) {
3474 printk("%s: memory allocation failure.\n", card->name);
3475 deinit_card(card);
3476 return -1;
3477 }
3478 memset(card->raw_cell_hnd, 0, 2 * sizeof(u32));
3479 writel(card->raw_cell_paddr, SAR_REG_RAWHND);
3480 IPRINTK("%s: raw cell handle is at 0x%p.\n", card->name,
3481 card->raw_cell_hnd);
3482
3483 size = sizeof(struct vc_map *) * card->tct_size;
3484 IPRINTK("%s: allocate %d byte for VC map.\n", card->name, size);
3485 if (NULL == (card->vcs = vmalloc(size))) {
3486 printk("%s: memory allocation failure.\n", card->name);
3487 deinit_card(card);
3488 return -1;
3489 }
3490 memset(card->vcs, 0, size);
3491
3492 size = sizeof(struct vc_map *) * card->scd_size;
3493 IPRINTK("%s: allocate %d byte for SCD to VC mapping.\n",
3494 card->name, size);
3495 if (NULL == (card->scd2vc = vmalloc(size))) {
3496 printk("%s: memory allocation failure.\n", card->name);
3497 deinit_card(card);
3498 return -1;
3499 }
3500 memset(card->scd2vc, 0, size);
3501
3502 size = sizeof(struct tst_info) * (card->tst_size - 2);
3503 IPRINTK("%s: allocate %d byte for TST to VC mapping.\n",
3504 card->name, size);
3505 if (NULL == (card->soft_tst = vmalloc(size))) {
3506 printk("%s: memory allocation failure.\n", card->name);
3507 deinit_card(card);
3508 return -1;
3509 }
3510 for (i = 0; i < card->tst_size - 2; i++) {
3511 card->soft_tst[i].tste = TSTE_OPC_VAR;
3512 card->soft_tst[i].vc = NULL;
3513 }
3514
3515 if (dev->phy == NULL) {
3516 printk("%s: No LT device defined.\n", card->name);
3517 deinit_card(card);
3518 return -1;
3519 }
3520 if (dev->phy->ioctl == NULL) {
3521 printk("%s: LT had no IOCTL funtion defined.\n", card->name);
3522 deinit_card(card);
3523 return -1;
3524 }
3525
3526 #ifdef CONFIG_ATM_IDT77252_USE_SUNI
3527 /*
3528 * this is a jhs hack to get around special functionality in the
3529 * phy driver for the atecom hardware; the functionality doesn't
3530 * exist in the linux atm suni driver
3531 *
3532 * it isn't the right way to do things, but as the guy from NIST
3533 * said, talking about their measurement of the fine structure
3534 * constant, "it's good enough for government work."
3535 */
3536 linkrate = 149760000;
3537 #endif
3538
3539 card->link_pcr = (linkrate / 8 / 53);
3540 printk("%s: Linkrate on ATM line : %u bit/s, %u cell/s.\n",
3541 card->name, linkrate, card->link_pcr);
3542
3543 #ifdef CONFIG_ATM_IDT77252_SEND_IDLE
3544 card->utopia_pcr = card->link_pcr;
3545 #else
3546 card->utopia_pcr = (160000000 / 8 / 54);
3547 #endif
3548
3549 rsvdcr = 0;
3550 if (card->utopia_pcr > card->link_pcr)
3551 rsvdcr = card->utopia_pcr - card->link_pcr;
3552
3553 tmpl = (unsigned long) rsvdcr * ((unsigned long) card->tst_size - 2);
3554 modl = tmpl % (unsigned long)card->utopia_pcr;
3555 tst_entries = (int) (tmpl / (unsigned long)card->utopia_pcr);
3556 if (modl)
3557 tst_entries++;
3558 card->tst_free -= tst_entries;
3559 fill_tst(card, NULL, tst_entries, TSTE_OPC_NULL);
3560
3561 #ifdef HAVE_EEPROM
3562 idt77252_eeprom_init(card);
3563 printk("%s: EEPROM: %02x:", card->name,
3564 idt77252_eeprom_read_status(card));
3565
3566 for (i = 0; i < 0x80; i++) {
3567 printk(" %02x",
3568 idt77252_eeprom_read_byte(card, i)
3569 );
3570 }
3571 printk("\n");
3572 #endif /* HAVE_EEPROM */
3573
3574 /*
3575 * XXX: <hack>
3576 */
3577 sprintf(tname, "eth%d", card->index);
3578 tmp = dev_get_by_name(tname); /* jhs: was "tmp = dev_get(tname);" */
3579 if (tmp) {
3580 memcpy(card->atmdev->esi, tmp->dev_addr, 6);
3581
3582 printk("%s: ESI %02x:%02x:%02x:%02x:%02x:%02x\n",
3583 card->name, card->atmdev->esi[0], card->atmdev->esi[1],
3584 card->atmdev->esi[2], card->atmdev->esi[3],
3585 card->atmdev->esi[4], card->atmdev->esi[5]);
3586 }
3587 /*
3588 * XXX: </hack>
3589 */
3590
3591 /* Set Maximum Deficit Count for now. */
3592 writel(0xffff, SAR_REG_MDFCT);
3593
3594 set_bit(IDT77252_BIT_INIT, &card->flags);
3595
3596 XPRINTK("%s: IDT77252 ABR SAR initialization complete.\n", card->name);
3597 return 0;
3598 }
3599
3600
3601 /*****************************************************************************/
3602 /* */
3603 /* Probing of IDT77252 ABR SAR */
3604 /* */
3605 /*****************************************************************************/
3606
3607
3608 static int __devinit
3609 idt77252_preset(struct idt77252_dev *card)
3610 {
3611 u16 pci_command;
3612
3613 /*****************************************************************/
3614 /* P C I C O N F I G U R A T I O N */
3615 /*****************************************************************/
3616
3617 XPRINTK("%s: Enable PCI master and memory access for SAR.\n",
3618 card->name);
3619 if (pci_read_config_word(card->pcidev, PCI_COMMAND, &pci_command)) {
3620 printk("%s: can't read PCI_COMMAND.\n", card->name);
3621 deinit_card(card);
3622 return -1;
3623 }
3624 if (!(pci_command & PCI_COMMAND_IO)) {
3625 printk("%s: PCI_COMMAND: %04x (???)\n",
3626 card->name, pci_command);
3627 deinit_card(card);
3628 return (-1);
3629 }
3630 pci_command |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
3631 if (pci_write_config_word(card->pcidev, PCI_COMMAND, pci_command)) {
3632 printk("%s: can't write PCI_COMMAND.\n", card->name);
3633 deinit_card(card);
3634 return -1;
3635 }
3636 /*****************************************************************/
3637 /* G E N E R I C R E S E T */
3638 /*****************************************************************/
3639
3640 /* Software reset */
3641 writel(SAR_CFG_SWRST, SAR_REG_CFG);
3642 mdelay(1);
3643 writel(0, SAR_REG_CFG);
3644
3645 IPRINTK("%s: Software resetted.\n", card->name);
3646 return 0;
3647 }
3648
3649
3650 static unsigned long __devinit
3651 probe_sram(struct idt77252_dev *card)
3652 {
3653 u32 data, addr;
3654
3655 writel(0, SAR_REG_DR0);
3656 writel(SAR_CMD_WRITE_SRAM | (0 << 2), SAR_REG_CMD);
3657
3658 for (addr = 0x4000; addr < 0x80000; addr += 0x4000) {
3659 writel(ATM_POISON, SAR_REG_DR0);
3660 writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD);
3661
3662 writel(SAR_CMD_READ_SRAM | (0 << 2), SAR_REG_CMD);
3663 data = readl(SAR_REG_DR0);
3664
3665 if (data != 0)
3666 break;
3667 }
3668
3669 return addr * sizeof(u32);
3670 }
3671
3672 static int __devinit
3673 idt77252_init_one(struct pci_dev *pcidev, const struct pci_device_id *id)
3674 {
3675 static struct idt77252_dev **last = &idt77252_chain;
3676 static int index = 0;
3677
3678 unsigned long membase, srambase;
3679 struct idt77252_dev *card;
3680 struct atm_dev *dev;
3681 ushort revision = 0;
3682 int i, err;
3683
3684
3685 if ((err = pci_enable_device(pcidev))) {
3686 printk("idt77252: can't enable PCI device at %s\n", pci_name(pcidev));
3687 return err;
3688 }
3689
3690 if (pci_read_config_word(pcidev, PCI_REVISION_ID, &revision)) {
3691 printk("idt77252-%d: can't read PCI_REVISION_ID\n", index);
3692 err = -ENODEV;
3693 goto err_out_disable_pdev;
3694 }
3695
3696 card = kzalloc(sizeof(struct idt77252_dev), GFP_KERNEL);
3697 if (!card) {
3698 printk("idt77252-%d: can't allocate private data\n", index);
3699 err = -ENOMEM;
3700 goto err_out_disable_pdev;
3701 }
3702 card->revision = revision;
3703 card->index = index;
3704 card->pcidev = pcidev;
3705 sprintf(card->name, "idt77252-%d", card->index);
3706
3707 INIT_WORK(&card->tqueue, idt77252_softint);
3708
3709 membase = pci_resource_start(pcidev, 1);
3710 srambase = pci_resource_start(pcidev, 2);
3711
3712 init_MUTEX(&card->mutex);
3713 spin_lock_init(&card->cmd_lock);
3714 spin_lock_init(&card->tst_lock);
3715
3716 init_timer(&card->tst_timer);
3717 card->tst_timer.data = (unsigned long)card;
3718 card->tst_timer.function = tst_timer;
3719
3720 /* Do the I/O remapping... */
3721 card->membase = ioremap(membase, 1024);
3722 if (!card->membase) {
3723 printk("%s: can't ioremap() membase\n", card->name);
3724 err = -EIO;
3725 goto err_out_free_card;
3726 }
3727
3728 if (idt77252_preset(card)) {
3729 printk("%s: preset failed\n", card->name);
3730 err = -EIO;
3731 goto err_out_iounmap;
3732 }
3733
3734 dev = atm_dev_register("idt77252", &idt77252_ops, -1, NULL);
3735 if (!dev) {
3736 printk("%s: can't register atm device\n", card->name);
3737 err = -EIO;
3738 goto err_out_iounmap;
3739 }
3740 dev->dev_data = card;
3741 card->atmdev = dev;
3742
3743 #ifdef CONFIG_ATM_IDT77252_USE_SUNI
3744 suni_init(dev);
3745 if (!dev->phy) {
3746 printk("%s: can't init SUNI\n", card->name);
3747 err = -EIO;
3748 goto err_out_deinit_card;
3749 }
3750 #endif /* CONFIG_ATM_IDT77252_USE_SUNI */
3751
3752 card->sramsize = probe_sram(card);
3753
3754 for (i = 0; i < 4; i++) {
3755 card->fbq[i] = ioremap(srambase | 0x200000 | (i << 18), 4);
3756 if (!card->fbq[i]) {
3757 printk("%s: can't ioremap() FBQ%d\n", card->name, i);
3758 err = -EIO;
3759 goto err_out_deinit_card;
3760 }
3761 }
3762
3763 printk("%s: ABR SAR (Rev %c): MEM %08lx SRAM %08lx [%u KB]\n",
3764 card->name, ((revision > 1) && (revision < 25)) ?
3765 'A' + revision - 1 : '?', membase, srambase,
3766 card->sramsize / 1024);
3767
3768 if (init_card(dev)) {
3769 printk("%s: init_card failed\n", card->name);
3770 err = -EIO;
3771 goto err_out_deinit_card;
3772 }
3773
3774 dev->ci_range.vpi_bits = card->vpibits;
3775 dev->ci_range.vci_bits = card->vcibits;
3776 dev->link_rate = card->link_pcr;
3777
3778 if (dev->phy->start)
3779 dev->phy->start(dev);
3780
3781 if (idt77252_dev_open(card)) {
3782 printk("%s: dev_open failed\n", card->name);
3783 err = -EIO;
3784 goto err_out_stop;
3785 }
3786
3787 *last = card;
3788 last = &card->next;
3789 index++;
3790
3791 return 0;
3792
3793 err_out_stop:
3794 if (dev->phy->stop)
3795 dev->phy->stop(dev);
3796
3797 err_out_deinit_card:
3798 deinit_card(card);
3799
3800 err_out_iounmap:
3801 iounmap(card->membase);
3802
3803 err_out_free_card:
3804 kfree(card);
3805
3806 err_out_disable_pdev:
3807 pci_disable_device(pcidev);
3808 return err;
3809 }
3810
3811 static struct pci_device_id idt77252_pci_tbl[] =
3812 {
3813 { PCI_VENDOR_ID_IDT, PCI_DEVICE_ID_IDT_IDT77252,
3814 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
3815 { 0, }
3816 };
3817
3818 MODULE_DEVICE_TABLE(pci, idt77252_pci_tbl);
3819
3820 static struct pci_driver idt77252_driver = {
3821 .name = "idt77252",
3822 .id_table = idt77252_pci_tbl,
3823 .probe = idt77252_init_one,
3824 };
3825
3826 static int __init idt77252_init(void)
3827 {
3828 struct sk_buff *skb;
3829
3830 printk("%s: at %p\n", __FUNCTION__, idt77252_init);
3831
3832 if (sizeof(skb->cb) < sizeof(struct atm_skb_data) +
3833 sizeof(struct idt77252_skb_prv)) {
3834 printk(KERN_ERR "%s: skb->cb is too small (%lu < %lu)\n",
3835 __FUNCTION__, (unsigned long) sizeof(skb->cb),
3836 (unsigned long) sizeof(struct atm_skb_data) +
3837 sizeof(struct idt77252_skb_prv));
3838 return -EIO;
3839 }
3840
3841 return pci_register_driver(&idt77252_driver);
3842 }
3843
3844 static void __exit idt77252_exit(void)
3845 {
3846 struct idt77252_dev *card;
3847 struct atm_dev *dev;
3848
3849 pci_unregister_driver(&idt77252_driver);
3850
3851 while (idt77252_chain) {
3852 card = idt77252_chain;
3853 dev = card->atmdev;
3854 idt77252_chain = card->next;
3855
3856 if (dev->phy->stop)
3857 dev->phy->stop(dev);
3858 deinit_card(card);
3859 pci_disable_device(card->pcidev);
3860 kfree(card);
3861 }
3862
3863 DIPRINTK("idt77252: finished cleanup-module().\n");
3864 }
3865
3866 module_init(idt77252_init);
3867 module_exit(idt77252_exit);
3868
3869 MODULE_LICENSE("GPL");
3870
3871 module_param(vpibits, uint, 0);
3872 MODULE_PARM_DESC(vpibits, "number of VPI bits supported (0, 1, or 2)");
3873 #ifdef CONFIG_ATM_IDT77252_DEBUG
3874 module_param(debug, ulong, 0644);
3875 MODULE_PARM_DESC(debug, "debug bitmap, see drivers/atm/idt77252.h");
3876 #endif
3877
3878 MODULE_AUTHOR("Eddie C. Dost <ecd@atecom.com>");
3879 MODULE_DESCRIPTION("IDT77252 ABR SAR Driver");
kernel source for telekom puls (alcatel/mediatek)