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[SCSI] hpsa: factor out hpsa_p600_dma_prefetch_quirk
[linux-2.6.git] / drivers / atm / idt77252.c
blob98657a6a330d00a5ad8f1489e34784cfa3085a37
1 /*******************************************************************
2 *
3 * Copyright (c) 2000 ATecoM GmbH
4 *
5 * The author may be reached at ecd@atecom.com.
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 *
12 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
13 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
14 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
15 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
16 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
17 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
18 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
19 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
20 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
21 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
22 *
23 * You should have received a copy of the GNU General Public License along
24 * with this program; if not, write to the Free Software Foundation, Inc.,
25 * 675 Mass Ave, Cambridge, MA 02139, USA.
26 *
27 *******************************************************************/
28
29 #include <linux/module.h>
30 #include <linux/pci.h>
31 #include <linux/poison.h>
32 #include <linux/skbuff.h>
33 #include <linux/kernel.h>
34 #include <linux/vmalloc.h>
35 #include <linux/netdevice.h>
36 #include <linux/atmdev.h>
37 #include <linux/atm.h>
38 #include <linux/delay.h>
39 #include <linux/init.h>
40 #include <linux/bitops.h>
41 #include <linux/wait.h>
42 #include <linux/jiffies.h>
43 #include <linux/mutex.h>
44 #include <linux/slab.h>
45
46 #include <asm/io.h>
47 #include <asm/uaccess.h>
48 #include <asm/atomic.h>
49 #include <asm/byteorder.h>
50
51 #ifdef CONFIG_ATM_IDT77252_USE_SUNI
52 #include "suni.h"
53 #endif /* CONFIG_ATM_IDT77252_USE_SUNI */
54
55
56 #include "idt77252.h"
57 #include "idt77252_tables.h"
58
59 static unsigned int vpibits = 1;
60
61
62 #define ATM_IDT77252_SEND_IDLE 1
63
64
65 /*
66 * Debug HACKs.
67 */
68 #define DEBUG_MODULE 1
69 #undef HAVE_EEPROM /* does not work, yet. */
70
71 #ifdef CONFIG_ATM_IDT77252_DEBUG
72 static unsigned long debug = DBG_GENERAL;
73 #endif
74
75
76 #define SAR_RX_DELAY (SAR_CFG_RXINT_NODELAY)
77
78
79 /*
80 * SCQ Handling.
81 */
82 static struct scq_info *alloc_scq(struct idt77252_dev *, int);
83 static void free_scq(struct idt77252_dev *, struct scq_info *);
84 static int queue_skb(struct idt77252_dev *, struct vc_map *,
85 struct sk_buff *, int oam);
86 static void drain_scq(struct idt77252_dev *, struct vc_map *);
87 static unsigned long get_free_scd(struct idt77252_dev *, struct vc_map *);
88 static void fill_scd(struct idt77252_dev *, struct scq_info *, int);
89
90 /*
91 * FBQ Handling.
92 */
93 static int push_rx_skb(struct idt77252_dev *,
94 struct sk_buff *, int queue);
95 static void recycle_rx_skb(struct idt77252_dev *, struct sk_buff *);
96 static void flush_rx_pool(struct idt77252_dev *, struct rx_pool *);
97 static void recycle_rx_pool_skb(struct idt77252_dev *,
98 struct rx_pool *);
99 static void add_rx_skb(struct idt77252_dev *, int queue,
100 unsigned int size, unsigned int count);
101
102 /*
103 * RSQ Handling.
104 */
105 static int init_rsq(struct idt77252_dev *);
106 static void deinit_rsq(struct idt77252_dev *);
107 static void idt77252_rx(struct idt77252_dev *);
108
109 /*
110 * TSQ handling.
111 */
112 static int init_tsq(struct idt77252_dev *);
113 static void deinit_tsq(struct idt77252_dev *);
114 static void idt77252_tx(struct idt77252_dev *);
115
116
117 /*
118 * ATM Interface.
119 */
120 static void idt77252_dev_close(struct atm_dev *dev);
121 static int idt77252_open(struct atm_vcc *vcc);
122 static void idt77252_close(struct atm_vcc *vcc);
123 static int idt77252_send(struct atm_vcc *vcc, struct sk_buff *skb);
124 static int idt77252_send_oam(struct atm_vcc *vcc, void *cell,
125 int flags);
126 static void idt77252_phy_put(struct atm_dev *dev, unsigned char value,
127 unsigned long addr);
128 static unsigned char idt77252_phy_get(struct atm_dev *dev, unsigned long addr);
129 static int idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos,
130 int flags);
131 static int idt77252_proc_read(struct atm_dev *dev, loff_t * pos,
132 char *page);
133 static void idt77252_softint(struct work_struct *work);
134
135
136 static struct atmdev_ops idt77252_ops =
137 {
138 .dev_close = idt77252_dev_close,
139 .open = idt77252_open,
140 .close = idt77252_close,
141 .send = idt77252_send,
142 .send_oam = idt77252_send_oam,
143 .phy_put = idt77252_phy_put,
144 .phy_get = idt77252_phy_get,
145 .change_qos = idt77252_change_qos,
146 .proc_read = idt77252_proc_read,
147 .owner = THIS_MODULE
148 };
149
150 static struct idt77252_dev *idt77252_chain = NULL;
151 static unsigned int idt77252_sram_write_errors = 0;
152
153 /*****************************************************************************/
154 /* */
155 /* I/O and Utility Bus */
156 /* */
157 /*****************************************************************************/
158
159 static void
160 waitfor_idle(struct idt77252_dev *card)
161 {
162 u32 stat;
163
164 stat = readl(SAR_REG_STAT);
165 while (stat & SAR_STAT_CMDBZ)
166 stat = readl(SAR_REG_STAT);
167 }
168
169 static u32
170 read_sram(struct idt77252_dev *card, unsigned long addr)
171 {
172 unsigned long flags;
173 u32 value;
174
175 spin_lock_irqsave(&card->cmd_lock, flags);
176 writel(SAR_CMD_READ_SRAM | (addr << 2), SAR_REG_CMD);
177 waitfor_idle(card);
178 value = readl(SAR_REG_DR0);
179 spin_unlock_irqrestore(&card->cmd_lock, flags);
180 return value;
181 }
182
183 static void
184 write_sram(struct idt77252_dev *card, unsigned long addr, u32 value)
185 {
186 unsigned long flags;
187
188 if ((idt77252_sram_write_errors == 0) &&
189 (((addr > card->tst[0] + card->tst_size - 2) &&
190 (addr < card->tst[0] + card->tst_size)) ||
191 ((addr > card->tst[1] + card->tst_size - 2) &&
192 (addr < card->tst[1] + card->tst_size)))) {
193 printk("%s: ERROR: TST JMP section at %08lx written: %08x\n",
194 card->name, addr, value);
195 }
196
197 spin_lock_irqsave(&card->cmd_lock, flags);
198 writel(value, SAR_REG_DR0);
199 writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD);
200 waitfor_idle(card);
201 spin_unlock_irqrestore(&card->cmd_lock, flags);
202 }
203
204 static u8
205 read_utility(void *dev, unsigned long ubus_addr)
206 {
207 struct idt77252_dev *card = dev;
208 unsigned long flags;
209 u8 value;
210
211 if (!card) {
212 printk("Error: No such device.\n");
213 return -1;
214 }
215
216 spin_lock_irqsave(&card->cmd_lock, flags);
217 writel(SAR_CMD_READ_UTILITY + ubus_addr, SAR_REG_CMD);
218 waitfor_idle(card);
219 value = readl(SAR_REG_DR0);
220 spin_unlock_irqrestore(&card->cmd_lock, flags);
221 return value;
222 }
223
224 static void
225 write_utility(void *dev, unsigned long ubus_addr, u8 value)
226 {
227 struct idt77252_dev *card = dev;
228 unsigned long flags;
229
230 if (!card) {
231 printk("Error: No such device.\n");
232 return;
233 }
234
235 spin_lock_irqsave(&card->cmd_lock, flags);
236 writel((u32) value, SAR_REG_DR0);
237 writel(SAR_CMD_WRITE_UTILITY + ubus_addr, SAR_REG_CMD);
238 waitfor_idle(card);
239 spin_unlock_irqrestore(&card->cmd_lock, flags);
240 }
241
242 #ifdef HAVE_EEPROM
243 static u32 rdsrtab[] =
244 {
245 SAR_GP_EECS | SAR_GP_EESCLK,
246 0,
247 SAR_GP_EESCLK, /* 0 */
248 0,
249 SAR_GP_EESCLK, /* 0 */
250 0,
251 SAR_GP_EESCLK, /* 0 */
252 0,
253 SAR_GP_EESCLK, /* 0 */
254 0,
255 SAR_GP_EESCLK, /* 0 */
256 SAR_GP_EEDO,
257 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
258 0,
259 SAR_GP_EESCLK, /* 0 */
260 SAR_GP_EEDO,
261 SAR_GP_EESCLK | SAR_GP_EEDO /* 1 */
262 };
263
264 static u32 wrentab[] =
265 {
266 SAR_GP_EECS | SAR_GP_EESCLK,
267 0,
268 SAR_GP_EESCLK, /* 0 */
269 0,
270 SAR_GP_EESCLK, /* 0 */
271 0,
272 SAR_GP_EESCLK, /* 0 */
273 0,
274 SAR_GP_EESCLK, /* 0 */
275 SAR_GP_EEDO,
276 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
277 SAR_GP_EEDO,
278 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
279 0,
280 SAR_GP_EESCLK, /* 0 */
281 0,
282 SAR_GP_EESCLK /* 0 */
283 };
284
285 static u32 rdtab[] =
286 {
287 SAR_GP_EECS | SAR_GP_EESCLK,
288 0,
289 SAR_GP_EESCLK, /* 0 */
290 0,
291 SAR_GP_EESCLK, /* 0 */
292 0,
293 SAR_GP_EESCLK, /* 0 */
294 0,
295 SAR_GP_EESCLK, /* 0 */
296 0,
297 SAR_GP_EESCLK, /* 0 */
298 0,
299 SAR_GP_EESCLK, /* 0 */
300 SAR_GP_EEDO,
301 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
302 SAR_GP_EEDO,
303 SAR_GP_EESCLK | SAR_GP_EEDO /* 1 */
304 };
305
306 static u32 wrtab[] =
307 {
308 SAR_GP_EECS | SAR_GP_EESCLK,
309 0,
310 SAR_GP_EESCLK, /* 0 */
311 0,
312 SAR_GP_EESCLK, /* 0 */
313 0,
314 SAR_GP_EESCLK, /* 0 */
315 0,
316 SAR_GP_EESCLK, /* 0 */
317 0,
318 SAR_GP_EESCLK, /* 0 */
319 0,
320 SAR_GP_EESCLK, /* 0 */
321 SAR_GP_EEDO,
322 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
323 0,
324 SAR_GP_EESCLK /* 0 */
325 };
326
327 static u32 clktab[] =
328 {
329 0,
330 SAR_GP_EESCLK,
331 0,
332 SAR_GP_EESCLK,
333 0,
334 SAR_GP_EESCLK,
335 0,
336 SAR_GP_EESCLK,
337 0,
338 SAR_GP_EESCLK,
339 0,
340 SAR_GP_EESCLK,
341 0,
342 SAR_GP_EESCLK,
343 0,
344 SAR_GP_EESCLK,
345 0
346 };
347
348 static u32
349 idt77252_read_gp(struct idt77252_dev *card)
350 {
351 u32 gp;
352
353 gp = readl(SAR_REG_GP);
354 #if 0
355 printk("RD: %s\n", gp & SAR_GP_EEDI ? "1" : "0");
356 #endif
357 return gp;
358 }
359
360 static void
361 idt77252_write_gp(struct idt77252_dev *card, u32 value)
362 {
363 unsigned long flags;
364
365 #if 0
366 printk("WR: %s %s %s\n", value & SAR_GP_EECS ? " " : "/CS",
367 value & SAR_GP_EESCLK ? "HIGH" : "LOW ",
368 value & SAR_GP_EEDO ? "1" : "0");
369 #endif
370
371 spin_lock_irqsave(&card->cmd_lock, flags);
372 waitfor_idle(card);
373 writel(value, SAR_REG_GP);
374 spin_unlock_irqrestore(&card->cmd_lock, flags);
375 }
376
377 static u8
378 idt77252_eeprom_read_status(struct idt77252_dev *card)
379 {
380 u8 byte;
381 u32 gp;
382 int i, j;
383
384 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
385
386 for (i = 0; i < ARRAY_SIZE(rdsrtab); i++) {
387 idt77252_write_gp(card, gp | rdsrtab[i]);
388 udelay(5);
389 }
390 idt77252_write_gp(card, gp | SAR_GP_EECS);
391 udelay(5);
392
393 byte = 0;
394 for (i = 0, j = 0; i < 8; i++) {
395 byte <<= 1;
396
397 idt77252_write_gp(card, gp | clktab[j++]);
398 udelay(5);
399
400 byte |= idt77252_read_gp(card) & SAR_GP_EEDI ? 1 : 0;
401
402 idt77252_write_gp(card, gp | clktab[j++]);
403 udelay(5);
404 }
405 idt77252_write_gp(card, gp | SAR_GP_EECS);
406 udelay(5);
407
408 return byte;
409 }
410
411 static u8
412 idt77252_eeprom_read_byte(struct idt77252_dev *card, u8 offset)
413 {
414 u8 byte;
415 u32 gp;
416 int i, j;
417
418 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
419
420 for (i = 0; i < ARRAY_SIZE(rdtab); i++) {
421 idt77252_write_gp(card, gp | rdtab[i]);
422 udelay(5);
423 }
424 idt77252_write_gp(card, gp | SAR_GP_EECS);
425 udelay(5);
426
427 for (i = 0, j = 0; i < 8; i++) {
428 idt77252_write_gp(card, gp | clktab[j++] |
429 (offset & 1 ? SAR_GP_EEDO : 0));
430 udelay(5);
431
432 idt77252_write_gp(card, gp | clktab[j++] |
433 (offset & 1 ? SAR_GP_EEDO : 0));
434 udelay(5);
435
436 offset >>= 1;
437 }
438 idt77252_write_gp(card, gp | SAR_GP_EECS);
439 udelay(5);
440
441 byte = 0;
442 for (i = 0, j = 0; i < 8; i++) {
443 byte <<= 1;
444
445 idt77252_write_gp(card, gp | clktab[j++]);
446 udelay(5);
447
448 byte |= idt77252_read_gp(card) & SAR_GP_EEDI ? 1 : 0;
449
450 idt77252_write_gp(card, gp | clktab[j++]);
451 udelay(5);
452 }
453 idt77252_write_gp(card, gp | SAR_GP_EECS);
454 udelay(5);
455
456 return byte;
457 }
458
459 static void
460 idt77252_eeprom_write_byte(struct idt77252_dev *card, u8 offset, u8 data)
461 {
462 u32 gp;
463 int i, j;
464
465 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
466
467 for (i = 0; i < ARRAY_SIZE(wrentab); i++) {
468 idt77252_write_gp(card, gp | wrentab[i]);
469 udelay(5);
470 }
471 idt77252_write_gp(card, gp | SAR_GP_EECS);
472 udelay(5);
473
474 for (i = 0; i < ARRAY_SIZE(wrtab); i++) {
475 idt77252_write_gp(card, gp | wrtab[i]);
476 udelay(5);
477 }
478 idt77252_write_gp(card, gp | SAR_GP_EECS);
479 udelay(5);
480
481 for (i = 0, j = 0; i < 8; i++) {
482 idt77252_write_gp(card, gp | clktab[j++] |
483 (offset & 1 ? SAR_GP_EEDO : 0));
484 udelay(5);
485
486 idt77252_write_gp(card, gp | clktab[j++] |
487 (offset & 1 ? SAR_GP_EEDO : 0));
488 udelay(5);
489
490 offset >>= 1;
491 }
492 idt77252_write_gp(card, gp | SAR_GP_EECS);
493 udelay(5);
494
495 for (i = 0, j = 0; i < 8; i++) {
496 idt77252_write_gp(card, gp | clktab[j++] |
497 (data & 1 ? SAR_GP_EEDO : 0));
498 udelay(5);
499
500 idt77252_write_gp(card, gp | clktab[j++] |
501 (data & 1 ? SAR_GP_EEDO : 0));
502 udelay(5);
503
504 data >>= 1;
505 }
506 idt77252_write_gp(card, gp | SAR_GP_EECS);
507 udelay(5);
508 }
509
510 static void
511 idt77252_eeprom_init(struct idt77252_dev *card)
512 {
513 u32 gp;
514
515 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
516
517 idt77252_write_gp(card, gp | SAR_GP_EECS | SAR_GP_EESCLK);
518 udelay(5);
519 idt77252_write_gp(card, gp | SAR_GP_EECS);
520 udelay(5);
521 idt77252_write_gp(card, gp | SAR_GP_EECS | SAR_GP_EESCLK);
522 udelay(5);
523 idt77252_write_gp(card, gp | SAR_GP_EECS);
524 udelay(5);
525 }
526 #endif /* HAVE_EEPROM */
527
528
529 #ifdef CONFIG_ATM_IDT77252_DEBUG
530 static void
531 dump_tct(struct idt77252_dev *card, int index)
532 {
533 unsigned long tct;
534 int i;
535
536 tct = (unsigned long) (card->tct_base + index * SAR_SRAM_TCT_SIZE);
537
538 printk("%s: TCT %x:", card->name, index);
539 for (i = 0; i < 8; i++) {
540 printk(" %08x", read_sram(card, tct + i));
541 }
542 printk("\n");
543 }
544
545 static void
546 idt77252_tx_dump(struct idt77252_dev *card)
547 {
548 struct atm_vcc *vcc;
549 struct vc_map *vc;
550 int i;
551
552 printk("%s\n", __func__);
553 for (i = 0; i < card->tct_size; i++) {
554 vc = card->vcs[i];
555 if (!vc)
556 continue;
557
558 vcc = NULL;
559 if (vc->rx_vcc)
560 vcc = vc->rx_vcc;
561 else if (vc->tx_vcc)
562 vcc = vc->tx_vcc;
563
564 if (!vcc)
565 continue;
566
567 printk("%s: Connection %d:\n", card->name, vc->index);
568 dump_tct(card, vc->index);
569 }
570 }
571 #endif
572
573
574 /*****************************************************************************/
575 /* */
576 /* SCQ Handling */
577 /* */
578 /*****************************************************************************/
579
580 static int
581 sb_pool_add(struct idt77252_dev *card, struct sk_buff *skb, int queue)
582 {
583 struct sb_pool *pool = &card->sbpool[queue];
584 int index;
585
586 index = pool->index;
587 while (pool->skb[index]) {
588 index = (index + 1) & FBQ_MASK;
589 if (index == pool->index)
590 return -ENOBUFS;
591 }
592
593 pool->skb[index] = skb;
594 IDT77252_PRV_POOL(skb) = POOL_HANDLE(queue, index);
595
596 pool->index = (index + 1) & FBQ_MASK;
597 return 0;
598 }
599
600 static void
601 sb_pool_remove(struct idt77252_dev *card, struct sk_buff *skb)
602 {
603 unsigned int queue, index;
604 u32 handle;
605
606 handle = IDT77252_PRV_POOL(skb);
607
608 queue = POOL_QUEUE(handle);
609 if (queue > 3)
610 return;
611
612 index = POOL_INDEX(handle);
613 if (index > FBQ_SIZE - 1)
614 return;
615
616 card->sbpool[queue].skb[index] = NULL;
617 }
618
619 static struct sk_buff *
620 sb_pool_skb(struct idt77252_dev *card, u32 handle)
621 {
622 unsigned int queue, index;
623
624 queue = POOL_QUEUE(handle);
625 if (queue > 3)
626 return NULL;
627
628 index = POOL_INDEX(handle);
629 if (index > FBQ_SIZE - 1)
630 return NULL;
631
632 return card->sbpool[queue].skb[index];
633 }
634
635 static struct scq_info *
636 alloc_scq(struct idt77252_dev *card, int class)
637 {
638 struct scq_info *scq;
639
640 scq = kzalloc(sizeof(struct scq_info), GFP_KERNEL);
641 if (!scq)
642 return NULL;
643 scq->base = pci_alloc_consistent(card->pcidev, SCQ_SIZE,
644 &scq->paddr);
645 if (scq->base == NULL) {
646 kfree(scq);
647 return NULL;
648 }
649 memset(scq->base, 0, SCQ_SIZE);
650
651 scq->next = scq->base;
652 scq->last = scq->base + (SCQ_ENTRIES - 1);
653 atomic_set(&scq->used, 0);
654
655 spin_lock_init(&scq->lock);
656 spin_lock_init(&scq->skblock);
657
658 skb_queue_head_init(&scq->transmit);
659 skb_queue_head_init(&scq->pending);
660
661 TXPRINTK("idt77252: SCQ: base 0x%p, next 0x%p, last 0x%p, paddr %08llx\n",
662 scq->base, scq->next, scq->last, (unsigned long long)scq->paddr);
663
664 return scq;
665 }
666
667 static void
668 free_scq(struct idt77252_dev *card, struct scq_info *scq)
669 {
670 struct sk_buff *skb;
671 struct atm_vcc *vcc;
672
673 pci_free_consistent(card->pcidev, SCQ_SIZE,
674 scq->base, scq->paddr);
675
676 while ((skb = skb_dequeue(&scq->transmit))) {
677 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
678 skb->len, PCI_DMA_TODEVICE);
679
680 vcc = ATM_SKB(skb)->vcc;
681 if (vcc->pop)
682 vcc->pop(vcc, skb);
683 else
684 dev_kfree_skb(skb);
685 }
686
687 while ((skb = skb_dequeue(&scq->pending))) {
688 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
689 skb->len, PCI_DMA_TODEVICE);
690
691 vcc = ATM_SKB(skb)->vcc;
692 if (vcc->pop)
693 vcc->pop(vcc, skb);
694 else
695 dev_kfree_skb(skb);
696 }
697
698 kfree(scq);
699 }
700
701
702 static int
703 push_on_scq(struct idt77252_dev *card, struct vc_map *vc, struct sk_buff *skb)
704 {
705 struct scq_info *scq = vc->scq;
706 unsigned long flags;
707 struct scqe *tbd;
708 int entries;
709
710 TXPRINTK("%s: SCQ: next 0x%p\n", card->name, scq->next);
711
712 atomic_inc(&scq->used);
713 entries = atomic_read(&scq->used);
714 if (entries > (SCQ_ENTRIES - 1)) {
715 atomic_dec(&scq->used);
716 goto out;
717 }
718
719 skb_queue_tail(&scq->transmit, skb);
720
721 spin_lock_irqsave(&vc->lock, flags);
722 if (vc->estimator) {
723 struct atm_vcc *vcc = vc->tx_vcc;
724 struct sock *sk = sk_atm(vcc);
725
726 vc->estimator->cells += (skb->len + 47) / 48;
727 if (atomic_read(&sk->sk_wmem_alloc) >
728 (sk->sk_sndbuf >> 1)) {
729 u32 cps = vc->estimator->maxcps;
730
731 vc->estimator->cps = cps;
732 vc->estimator->avcps = cps << 5;
733 if (vc->lacr < vc->init_er) {
734 vc->lacr = vc->init_er;
735 writel(TCMDQ_LACR | (vc->lacr << 16) |
736 vc->index, SAR_REG_TCMDQ);
737 }
738 }
739 }
740 spin_unlock_irqrestore(&vc->lock, flags);
741
742 tbd = &IDT77252_PRV_TBD(skb);
743
744 spin_lock_irqsave(&scq->lock, flags);
745 scq->next->word_1 = cpu_to_le32(tbd->word_1 |
746 SAR_TBD_TSIF | SAR_TBD_GTSI);
747 scq->next->word_2 = cpu_to_le32(tbd->word_2);
748 scq->next->word_3 = cpu_to_le32(tbd->word_3);
749 scq->next->word_4 = cpu_to_le32(tbd->word_4);
750
751 if (scq->next == scq->last)
752 scq->next = scq->base;
753 else
754 scq->next++;
755
756 write_sram(card, scq->scd,
757 scq->paddr +
758 (u32)((unsigned long)scq->next - (unsigned long)scq->base));
759 spin_unlock_irqrestore(&scq->lock, flags);
760
761 scq->trans_start = jiffies;
762
763 if (test_and_clear_bit(VCF_IDLE, &vc->flags)) {
764 writel(TCMDQ_START_LACR | (vc->lacr << 16) | vc->index,
765 SAR_REG_TCMDQ);
766 }
767
768 TXPRINTK("%d entries in SCQ used (push).\n", atomic_read(&scq->used));
769
770 XPRINTK("%s: SCQ (after push %2d) head = 0x%x, next = 0x%p.\n",
771 card->name, atomic_read(&scq->used),
772 read_sram(card, scq->scd + 1), scq->next);
773
774 return 0;
775
776 out:
777 if (time_after(jiffies, scq->trans_start + HZ)) {
778 printk("%s: Error pushing TBD for %d.%d\n",
779 card->name, vc->tx_vcc->vpi, vc->tx_vcc->vci);
780 #ifdef CONFIG_ATM_IDT77252_DEBUG
781 idt77252_tx_dump(card);
782 #endif
783 scq->trans_start = jiffies;
784 }
785
786 return -ENOBUFS;
787 }
788
789
790 static void
791 drain_scq(struct idt77252_dev *card, struct vc_map *vc)
792 {
793 struct scq_info *scq = vc->scq;
794 struct sk_buff *skb;
795 struct atm_vcc *vcc;
796
797 TXPRINTK("%s: SCQ (before drain %2d) next = 0x%p.\n",
798 card->name, atomic_read(&scq->used), scq->next);
799
800 skb = skb_dequeue(&scq->transmit);
801 if (skb) {
802 TXPRINTK("%s: freeing skb at %p.\n", card->name, skb);
803
804 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
805 skb->len, PCI_DMA_TODEVICE);
806
807 vcc = ATM_SKB(skb)->vcc;
808
809 if (vcc->pop)
810 vcc->pop(vcc, skb);
811 else
812 dev_kfree_skb(skb);
813
814 atomic_inc(&vcc->stats->tx);
815 }
816
817 atomic_dec(&scq->used);
818
819 spin_lock(&scq->skblock);
820 while ((skb = skb_dequeue(&scq->pending))) {
821 if (push_on_scq(card, vc, skb)) {
822 skb_queue_head(&vc->scq->pending, skb);
823 break;
824 }
825 }
826 spin_unlock(&scq->skblock);
827 }
828
829 static int
830 queue_skb(struct idt77252_dev *card, struct vc_map *vc,
831 struct sk_buff *skb, int oam)
832 {
833 struct atm_vcc *vcc;
834 struct scqe *tbd;
835 unsigned long flags;
836 int error;
837 int aal;
838
839 if (skb->len == 0) {
840 printk("%s: invalid skb->len (%d)\n", card->name, skb->len);
841 return -EINVAL;
842 }
843
844 TXPRINTK("%s: Sending %d bytes of data.\n",
845 card->name, skb->len);
846
847 tbd = &IDT77252_PRV_TBD(skb);
848 vcc = ATM_SKB(skb)->vcc;
849
850 IDT77252_PRV_PADDR(skb) = pci_map_single(card->pcidev, skb->data,
851 skb->len, PCI_DMA_TODEVICE);
852
853 error = -EINVAL;
854
855 if (oam) {
856 if (skb->len != 52)
857 goto errout;
858
859 tbd->word_1 = SAR_TBD_OAM | ATM_CELL_PAYLOAD | SAR_TBD_EPDU;
860 tbd->word_2 = IDT77252_PRV_PADDR(skb) + 4;
861 tbd->word_3 = 0x00000000;
862 tbd->word_4 = (skb->data[0] << 24) | (skb->data[1] << 16) |
863 (skb->data[2] << 8) | (skb->data[3] << 0);
864
865 if (test_bit(VCF_RSV, &vc->flags))
866 vc = card->vcs[0];
867
868 goto done;
869 }
870
871 if (test_bit(VCF_RSV, &vc->flags)) {
872 printk("%s: Trying to transmit on reserved VC\n", card->name);
873 goto errout;
874 }
875
876 aal = vcc->qos.aal;
877
878 switch (aal) {
879 case ATM_AAL0:
880 case ATM_AAL34:
881 if (skb->len > 52)
882 goto errout;
883
884 if (aal == ATM_AAL0)
885 tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL0 |
886 ATM_CELL_PAYLOAD;
887 else
888 tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL34 |
889 ATM_CELL_PAYLOAD;
890
891 tbd->word_2 = IDT77252_PRV_PADDR(skb) + 4;
892 tbd->word_3 = 0x00000000;
893 tbd->word_4 = (skb->data[0] << 24) | (skb->data[1] << 16) |
894 (skb->data[2] << 8) | (skb->data[3] << 0);
895 break;
896
897 case ATM_AAL5:
898 tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL5 | skb->len;
899 tbd->word_2 = IDT77252_PRV_PADDR(skb);
900 tbd->word_3 = skb->len;
901 tbd->word_4 = (vcc->vpi << SAR_TBD_VPI_SHIFT) |
902 (vcc->vci << SAR_TBD_VCI_SHIFT);
903 break;
904
905 case ATM_AAL1:
906 case ATM_AAL2:
907 default:
908 printk("%s: Traffic type not supported.\n", card->name);
909 error = -EPROTONOSUPPORT;
910 goto errout;
911 }
912
913 done:
914 spin_lock_irqsave(&vc->scq->skblock, flags);
915 skb_queue_tail(&vc->scq->pending, skb);
916
917 while ((skb = skb_dequeue(&vc->scq->pending))) {
918 if (push_on_scq(card, vc, skb)) {
919 skb_queue_head(&vc->scq->pending, skb);
920 break;
921 }
922 }
923 spin_unlock_irqrestore(&vc->scq->skblock, flags);
924
925 return 0;
926
927 errout:
928 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
929 skb->len, PCI_DMA_TODEVICE);
930 return error;
931 }
932
933 static unsigned long
934 get_free_scd(struct idt77252_dev *card, struct vc_map *vc)
935 {
936 int i;
937
938 for (i = 0; i < card->scd_size; i++) {
939 if (!card->scd2vc[i]) {
940 card->scd2vc[i] = vc;
941 vc->scd_index = i;
942 return card->scd_base + i * SAR_SRAM_SCD_SIZE;
943 }
944 }
945 return 0;
946 }
947
948 static void
949 fill_scd(struct idt77252_dev *card, struct scq_info *scq, int class)
950 {
951 write_sram(card, scq->scd, scq->paddr);
952 write_sram(card, scq->scd + 1, 0x00000000);
953 write_sram(card, scq->scd + 2, 0xffffffff);
954 write_sram(card, scq->scd + 3, 0x00000000);
955 }
956
957 static void
958 clear_scd(struct idt77252_dev *card, struct scq_info *scq, int class)
959 {
960 return;
961 }
962
963 /*****************************************************************************/
964 /* */
965 /* RSQ Handling */
966 /* */
967 /*****************************************************************************/
968
969 static int
970 init_rsq(struct idt77252_dev *card)
971 {
972 struct rsq_entry *rsqe;
973
974 card->rsq.base = pci_alloc_consistent(card->pcidev, RSQSIZE,
975 &card->rsq.paddr);
976 if (card->rsq.base == NULL) {
977 printk("%s: can't allocate RSQ.\n", card->name);
978 return -1;
979 }
980 memset(card->rsq.base, 0, RSQSIZE);
981
982 card->rsq.last = card->rsq.base + RSQ_NUM_ENTRIES - 1;
983 card->rsq.next = card->rsq.last;
984 for (rsqe = card->rsq.base; rsqe <= card->rsq.last; rsqe++)
985 rsqe->word_4 = 0;
986
987 writel((unsigned long) card->rsq.last - (unsigned long) card->rsq.base,
988 SAR_REG_RSQH);
989 writel(card->rsq.paddr, SAR_REG_RSQB);
990
991 IPRINTK("%s: RSQ base at 0x%lx (0x%x).\n", card->name,
992 (unsigned long) card->rsq.base,
993 readl(SAR_REG_RSQB));
994 IPRINTK("%s: RSQ head = 0x%x, base = 0x%x, tail = 0x%x.\n",
995 card->name,
996 readl(SAR_REG_RSQH),
997 readl(SAR_REG_RSQB),
998 readl(SAR_REG_RSQT));
999
1000 return 0;
1001 }
1002
1003 static void
1004 deinit_rsq(struct idt77252_dev *card)
1005 {
1006 pci_free_consistent(card->pcidev, RSQSIZE,
1007 card->rsq.base, card->rsq.paddr);
1008 }
1009
1010 static void
1011 dequeue_rx(struct idt77252_dev *card, struct rsq_entry *rsqe)
1012 {
1013 struct atm_vcc *vcc;
1014 struct sk_buff *skb;
1015 struct rx_pool *rpp;
1016 struct vc_map *vc;
1017 u32 header, vpi, vci;
1018 u32 stat;
1019 int i;
1020
1021 stat = le32_to_cpu(rsqe->word_4);
1022
1023 if (stat & SAR_RSQE_IDLE) {
1024 RXPRINTK("%s: message about inactive connection.\n",
1025 card->name);
1026 return;
1027 }
1028
1029 skb = sb_pool_skb(card, le32_to_cpu(rsqe->word_2));
1030 if (skb == NULL) {
1031 printk("%s: NULL skb in %s, rsqe: %08x %08x %08x %08x\n",
1032 card->name, __func__,
1033 le32_to_cpu(rsqe->word_1), le32_to_cpu(rsqe->word_2),
1034 le32_to_cpu(rsqe->word_3), le32_to_cpu(rsqe->word_4));
1035 return;
1036 }
1037
1038 header = le32_to_cpu(rsqe->word_1);
1039 vpi = (header >> 16) & 0x00ff;
1040 vci = (header >> 0) & 0xffff;
1041
1042 RXPRINTK("%s: SDU for %d.%d received in buffer 0x%p (data 0x%p).\n",
1043 card->name, vpi, vci, skb, skb->data);
1044
1045 if ((vpi >= (1 << card->vpibits)) || (vci != (vci & card->vcimask))) {
1046 printk("%s: SDU received for out-of-range vc %u.%u\n",
1047 card->name, vpi, vci);
1048 recycle_rx_skb(card, skb);
1049 return;
1050 }
1051
1052 vc = card->vcs[VPCI2VC(card, vpi, vci)];
1053 if (!vc || !test_bit(VCF_RX, &vc->flags)) {
1054 printk("%s: SDU received on non RX vc %u.%u\n",
1055 card->name, vpi, vci);
1056 recycle_rx_skb(card, skb);
1057 return;
1058 }
1059
1060 vcc = vc->rx_vcc;
1061
1062 pci_dma_sync_single_for_cpu(card->pcidev, IDT77252_PRV_PADDR(skb),
1063 skb_end_pointer(skb) - skb->data,
1064 PCI_DMA_FROMDEVICE);
1065
1066 if ((vcc->qos.aal == ATM_AAL0) ||
1067 (vcc->qos.aal == ATM_AAL34)) {
1068 struct sk_buff *sb;
1069 unsigned char *cell;
1070 u32 aal0;
1071
1072 cell = skb->data;
1073 for (i = (stat & SAR_RSQE_CELLCNT); i; i--) {
1074 if ((sb = dev_alloc_skb(64)) == NULL) {
1075 printk("%s: Can't allocate buffers for aal0.\n",
1076 card->name);
1077 atomic_add(i, &vcc->stats->rx_drop);
1078 break;
1079 }
1080 if (!atm_charge(vcc, sb->truesize)) {
1081 RXPRINTK("%s: atm_charge() dropped aal0 packets.\n",
1082 card->name);
1083 atomic_add(i - 1, &vcc->stats->rx_drop);
1084 dev_kfree_skb(sb);
1085 break;
1086 }
1087 aal0 = (vpi << ATM_HDR_VPI_SHIFT) |
1088 (vci << ATM_HDR_VCI_SHIFT);
1089 aal0 |= (stat & SAR_RSQE_EPDU) ? 0x00000002 : 0;
1090 aal0 |= (stat & SAR_RSQE_CLP) ? 0x00000001 : 0;
1091
1092 *((u32 *) sb->data) = aal0;
1093 skb_put(sb, sizeof(u32));
1094 memcpy(skb_put(sb, ATM_CELL_PAYLOAD),
1095 cell, ATM_CELL_PAYLOAD);
1096
1097 ATM_SKB(sb)->vcc = vcc;
1098 __net_timestamp(sb);
1099 vcc->push(vcc, sb);
1100 atomic_inc(&vcc->stats->rx);
1101
1102 cell += ATM_CELL_PAYLOAD;
1103 }
1104
1105 recycle_rx_skb(card, skb);
1106 return;
1107 }
1108 if (vcc->qos.aal != ATM_AAL5) {
1109 printk("%s: Unexpected AAL type in dequeue_rx(): %d.\n",
1110 card->name, vcc->qos.aal);
1111 recycle_rx_skb(card, skb);
1112 return;
1113 }
1114 skb->len = (stat & SAR_RSQE_CELLCNT) * ATM_CELL_PAYLOAD;
1115
1116 rpp = &vc->rcv.rx_pool;
1117
1118 __skb_queue_tail(&rpp->queue, skb);
1119 rpp->len += skb->len;
1120
1121 if (stat & SAR_RSQE_EPDU) {
1122 unsigned char *l1l2;
1123 unsigned int len;
1124
1125 l1l2 = (unsigned char *) ((unsigned long) skb->data + skb->len - 6);
1126
1127 len = (l1l2[0] << 8) | l1l2[1];
1128 len = len ? len : 0x10000;
1129
1130 RXPRINTK("%s: PDU has %d bytes.\n", card->name, len);
1131
1132 if ((len + 8 > rpp->len) || (len + (47 + 8) < rpp->len)) {
1133 RXPRINTK("%s: AAL5 PDU size mismatch: %d != %d. "
1134 "(CDC: %08x)\n",
1135 card->name, len, rpp->len, readl(SAR_REG_CDC));
1136 recycle_rx_pool_skb(card, rpp);
1137 atomic_inc(&vcc->stats->rx_err);
1138 return;
1139 }
1140 if (stat & SAR_RSQE_CRC) {
1141 RXPRINTK("%s: AAL5 CRC error.\n", card->name);
1142 recycle_rx_pool_skb(card, rpp);
1143 atomic_inc(&vcc->stats->rx_err);
1144 return;
1145 }
1146 if (skb_queue_len(&rpp->queue) > 1) {
1147 struct sk_buff *sb;
1148
1149 skb = dev_alloc_skb(rpp->len);
1150 if (!skb) {
1151 RXPRINTK("%s: Can't alloc RX skb.\n",
1152 card->name);
1153 recycle_rx_pool_skb(card, rpp);
1154 atomic_inc(&vcc->stats->rx_err);
1155 return;
1156 }
1157 if (!atm_charge(vcc, skb->truesize)) {
1158 recycle_rx_pool_skb(card, rpp);
1159 dev_kfree_skb(skb);
1160 return;
1161 }
1162 skb_queue_walk(&rpp->queue, sb)
1163 memcpy(skb_put(skb, sb->len),
1164 sb->data, sb->len);
1165
1166 recycle_rx_pool_skb(card, rpp);
1167
1168 skb_trim(skb, len);
1169 ATM_SKB(skb)->vcc = vcc;
1170 __net_timestamp(skb);
1171
1172 vcc->push(vcc, skb);
1173 atomic_inc(&vcc->stats->rx);
1174
1175 return;
1176 }
1177
1178 flush_rx_pool(card, rpp);
1179
1180 if (!atm_charge(vcc, skb->truesize)) {
1181 recycle_rx_skb(card, skb);
1182 return;
1183 }
1184
1185 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
1186 skb_end_pointer(skb) - skb->data,
1187 PCI_DMA_FROMDEVICE);
1188 sb_pool_remove(card, skb);
1189
1190 skb_trim(skb, len);
1191 ATM_SKB(skb)->vcc = vcc;
1192 __net_timestamp(skb);
1193
1194 vcc->push(vcc, skb);
1195 atomic_inc(&vcc->stats->rx);
1196
1197 if (skb->truesize > SAR_FB_SIZE_3)
1198 add_rx_skb(card, 3, SAR_FB_SIZE_3, 1);
1199 else if (skb->truesize > SAR_FB_SIZE_2)
1200 add_rx_skb(card, 2, SAR_FB_SIZE_2, 1);
1201 else if (skb->truesize > SAR_FB_SIZE_1)
1202 add_rx_skb(card, 1, SAR_FB_SIZE_1, 1);
1203 else
1204 add_rx_skb(card, 0, SAR_FB_SIZE_0, 1);
1205 return;
1206 }
1207 }
1208
1209 static void
1210 idt77252_rx(struct idt77252_dev *card)
1211 {
1212 struct rsq_entry *rsqe;
1213
1214 if (card->rsq.next == card->rsq.last)
1215 rsqe = card->rsq.base;
1216 else
1217 rsqe = card->rsq.next + 1;
1218
1219 if (!(le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID)) {
1220 RXPRINTK("%s: no entry in RSQ.\n", card->name);
1221 return;
1222 }
1223
1224 do {
1225 dequeue_rx(card, rsqe);
1226 rsqe->word_4 = 0;
1227 card->rsq.next = rsqe;
1228 if (card->rsq.next == card->rsq.last)
1229 rsqe = card->rsq.base;
1230 else
1231 rsqe = card->rsq.next + 1;
1232 } while (le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID);
1233
1234 writel((unsigned long) card->rsq.next - (unsigned long) card->rsq.base,
1235 SAR_REG_RSQH);
1236 }
1237
1238 static void
1239 idt77252_rx_raw(struct idt77252_dev *card)
1240 {
1241 struct sk_buff *queue;
1242 u32 head, tail;
1243 struct atm_vcc *vcc;
1244 struct vc_map *vc;
1245 struct sk_buff *sb;
1246
1247 if (card->raw_cell_head == NULL) {
1248 u32 handle = le32_to_cpu(*(card->raw_cell_hnd + 1));
1249 card->raw_cell_head = sb_pool_skb(card, handle);
1250 }
1251
1252 queue = card->raw_cell_head;
1253 if (!queue)
1254 return;
1255
1256 head = IDT77252_PRV_PADDR(queue) + (queue->data - queue->head - 16);
1257 tail = readl(SAR_REG_RAWCT);
1258
1259 pci_dma_sync_single_for_cpu(card->pcidev, IDT77252_PRV_PADDR(queue),
1260 skb_end_pointer(queue) - queue->head - 16,
1261 PCI_DMA_FROMDEVICE);
1262
1263 while (head != tail) {
1264 unsigned int vpi, vci, pti;
1265 u32 header;
1266
1267 header = le32_to_cpu(*(u32 *) &queue->data[0]);
1268
1269 vpi = (header & ATM_HDR_VPI_MASK) >> ATM_HDR_VPI_SHIFT;
1270 vci = (header & ATM_HDR_VCI_MASK) >> ATM_HDR_VCI_SHIFT;
1271 pti = (header & ATM_HDR_PTI_MASK) >> ATM_HDR_PTI_SHIFT;
1272
1273 #ifdef CONFIG_ATM_IDT77252_DEBUG
1274 if (debug & DBG_RAW_CELL) {
1275 int i;
1276
1277 printk("%s: raw cell %x.%02x.%04x.%x.%x\n",
1278 card->name, (header >> 28) & 0x000f,
1279 (header >> 20) & 0x00ff,
1280 (header >> 4) & 0xffff,
1281 (header >> 1) & 0x0007,
1282 (header >> 0) & 0x0001);
1283 for (i = 16; i < 64; i++)
1284 printk(" %02x", queue->data[i]);
1285 printk("\n");
1286 }
1287 #endif
1288
1289 if (vpi >= (1<<card->vpibits) || vci >= (1<<card->vcibits)) {
1290 RPRINTK("%s: SDU received for out-of-range vc %u.%u\n",
1291 card->name, vpi, vci);
1292 goto drop;
1293 }
1294
1295 vc = card->vcs[VPCI2VC(card, vpi, vci)];
1296 if (!vc || !test_bit(VCF_RX, &vc->flags)) {
1297 RPRINTK("%s: SDU received on non RX vc %u.%u\n",
1298 card->name, vpi, vci);
1299 goto drop;
1300 }
1301
1302 vcc = vc->rx_vcc;
1303
1304 if (vcc->qos.aal != ATM_AAL0) {
1305 RPRINTK("%s: raw cell for non AAL0 vc %u.%u\n",
1306 card->name, vpi, vci);
1307 atomic_inc(&vcc->stats->rx_drop);
1308 goto drop;
1309 }
1310
1311 if ((sb = dev_alloc_skb(64)) == NULL) {
1312 printk("%s: Can't allocate buffers for AAL0.\n",
1313 card->name);
1314 atomic_inc(&vcc->stats->rx_err);
1315 goto drop;
1316 }
1317
1318 if (!atm_charge(vcc, sb->truesize)) {
1319 RXPRINTK("%s: atm_charge() dropped AAL0 packets.\n",
1320 card->name);
1321 dev_kfree_skb(sb);
1322 goto drop;
1323 }
1324
1325 *((u32 *) sb->data) = header;
1326 skb_put(sb, sizeof(u32));
1327 memcpy(skb_put(sb, ATM_CELL_PAYLOAD), &(queue->data[16]),
1328 ATM_CELL_PAYLOAD);
1329
1330 ATM_SKB(sb)->vcc = vcc;
1331 __net_timestamp(sb);
1332 vcc->push(vcc, sb);
1333 atomic_inc(&vcc->stats->rx);
1334
1335 drop:
1336 skb_pull(queue, 64);
1337
1338 head = IDT77252_PRV_PADDR(queue)
1339 + (queue->data - queue->head - 16);
1340
1341 if (queue->len < 128) {
1342 struct sk_buff *next;
1343 u32 handle;
1344
1345 head = le32_to_cpu(*(u32 *) &queue->data[0]);
1346 handle = le32_to_cpu(*(u32 *) &queue->data[4]);
1347
1348 next = sb_pool_skb(card, handle);
1349 recycle_rx_skb(card, queue);
1350
1351 if (next) {
1352 card->raw_cell_head = next;
1353 queue = card->raw_cell_head;
1354 pci_dma_sync_single_for_cpu(card->pcidev,
1355 IDT77252_PRV_PADDR(queue),
1356 (skb_end_pointer(queue) -
1357 queue->data),
1358 PCI_DMA_FROMDEVICE);
1359 } else {
1360 card->raw_cell_head = NULL;
1361 printk("%s: raw cell queue overrun\n",
1362 card->name);
1363 break;
1364 }
1365 }
1366 }
1367 }
1368
1369
1370 /*****************************************************************************/
1371 /* */
1372 /* TSQ Handling */
1373 /* */
1374 /*****************************************************************************/
1375
1376 static int
1377 init_tsq(struct idt77252_dev *card)
1378 {
1379 struct tsq_entry *tsqe;
1380
1381 card->tsq.base = pci_alloc_consistent(card->pcidev, RSQSIZE,
1382 &card->tsq.paddr);
1383 if (card->tsq.base == NULL) {
1384 printk("%s: can't allocate TSQ.\n", card->name);
1385 return -1;
1386 }
1387 memset(card->tsq.base, 0, TSQSIZE);
1388
1389 card->tsq.last = card->tsq.base + TSQ_NUM_ENTRIES - 1;
1390 card->tsq.next = card->tsq.last;
1391 for (tsqe = card->tsq.base; tsqe <= card->tsq.last; tsqe++)
1392 tsqe->word_2 = cpu_to_le32(SAR_TSQE_INVALID);
1393
1394 writel(card->tsq.paddr, SAR_REG_TSQB);
1395 writel((unsigned long) card->tsq.next - (unsigned long) card->tsq.base,
1396 SAR_REG_TSQH);
1397
1398 return 0;
1399 }
1400
1401 static void
1402 deinit_tsq(struct idt77252_dev *card)
1403 {
1404 pci_free_consistent(card->pcidev, TSQSIZE,
1405 card->tsq.base, card->tsq.paddr);
1406 }
1407
1408 static void
1409 idt77252_tx(struct idt77252_dev *card)
1410 {
1411 struct tsq_entry *tsqe;
1412 unsigned int vpi, vci;
1413 struct vc_map *vc;
1414 u32 conn, stat;
1415
1416 if (card->tsq.next == card->tsq.last)
1417 tsqe = card->tsq.base;
1418 else
1419 tsqe = card->tsq.next + 1;
1420
1421 TXPRINTK("idt77252_tx: tsq %p: base %p, next %p, last %p\n", tsqe,
1422 card->tsq.base, card->tsq.next, card->tsq.last);
1423 TXPRINTK("idt77252_tx: tsqb %08x, tsqt %08x, tsqh %08x, \n",
1424 readl(SAR_REG_TSQB),
1425 readl(SAR_REG_TSQT),
1426 readl(SAR_REG_TSQH));
1427
1428 stat = le32_to_cpu(tsqe->word_2);
1429
1430 if (stat & SAR_TSQE_INVALID)
1431 return;
1432
1433 do {
1434 TXPRINTK("tsqe: 0x%p [0x%08x 0x%08x]\n", tsqe,
1435 le32_to_cpu(tsqe->word_1),
1436 le32_to_cpu(tsqe->word_2));
1437
1438 switch (stat & SAR_TSQE_TYPE) {
1439 case SAR_TSQE_TYPE_TIMER:
1440 TXPRINTK("%s: Timer RollOver detected.\n", card->name);
1441 break;
1442
1443 case SAR_TSQE_TYPE_IDLE:
1444
1445 conn = le32_to_cpu(tsqe->word_1);
1446
1447 if (SAR_TSQE_TAG(stat) == 0x10) {
1448 #ifdef NOTDEF
1449 printk("%s: Connection %d halted.\n",
1450 card->name,
1451 le32_to_cpu(tsqe->word_1) & 0x1fff);
1452 #endif
1453 break;
1454 }
1455
1456 vc = card->vcs[conn & 0x1fff];
1457 if (!vc) {
1458 printk("%s: could not find VC from conn %d\n",
1459 card->name, conn & 0x1fff);
1460 break;
1461 }
1462
1463 printk("%s: Connection %d IDLE.\n",
1464 card->name, vc->index);
1465
1466 set_bit(VCF_IDLE, &vc->flags);
1467 break;
1468
1469 case SAR_TSQE_TYPE_TSR:
1470
1471 conn = le32_to_cpu(tsqe->word_1);
1472
1473 vc = card->vcs[conn & 0x1fff];
1474 if (!vc) {
1475 printk("%s: no VC at index %d\n",
1476 card->name,
1477 le32_to_cpu(tsqe->word_1) & 0x1fff);
1478 break;
1479 }
1480
1481 drain_scq(card, vc);
1482 break;
1483
1484 case SAR_TSQE_TYPE_TBD_COMP:
1485
1486 conn = le32_to_cpu(tsqe->word_1);
1487
1488 vpi = (conn >> SAR_TBD_VPI_SHIFT) & 0x00ff;
1489 vci = (conn >> SAR_TBD_VCI_SHIFT) & 0xffff;
1490
1491 if (vpi >= (1 << card->vpibits) ||
1492 vci >= (1 << card->vcibits)) {
1493 printk("%s: TBD complete: "
1494 "out of range VPI.VCI %u.%u\n",
1495 card->name, vpi, vci);
1496 break;
1497 }
1498
1499 vc = card->vcs[VPCI2VC(card, vpi, vci)];
1500 if (!vc) {
1501 printk("%s: TBD complete: "
1502 "no VC at VPI.VCI %u.%u\n",
1503 card->name, vpi, vci);
1504 break;
1505 }
1506
1507 drain_scq(card, vc);
1508 break;
1509 }
1510
1511 tsqe->word_2 = cpu_to_le32(SAR_TSQE_INVALID);
1512
1513 card->tsq.next = tsqe;
1514 if (card->tsq.next == card->tsq.last)
1515 tsqe = card->tsq.base;
1516 else
1517 tsqe = card->tsq.next + 1;
1518
1519 TXPRINTK("tsqe: %p: base %p, next %p, last %p\n", tsqe,
1520 card->tsq.base, card->tsq.next, card->tsq.last);
1521
1522 stat = le32_to_cpu(tsqe->word_2);
1523
1524 } while (!(stat & SAR_TSQE_INVALID));
1525
1526 writel((unsigned long)card->tsq.next - (unsigned long)card->tsq.base,
1527 SAR_REG_TSQH);
1528
1529 XPRINTK("idt77252_tx-after writel%d: TSQ head = 0x%x, tail = 0x%x, next = 0x%p.\n",
1530 card->index, readl(SAR_REG_TSQH),
1531 readl(SAR_REG_TSQT), card->tsq.next);
1532 }
1533
1534
1535 static void
1536 tst_timer(unsigned long data)
1537 {
1538 struct idt77252_dev *card = (struct idt77252_dev *)data;
1539 unsigned long base, idle, jump;
1540 unsigned long flags;
1541 u32 pc;
1542 int e;
1543
1544 spin_lock_irqsave(&card->tst_lock, flags);
1545
1546 base = card->tst[card->tst_index];
1547 idle = card->tst[card->tst_index ^ 1];
1548
1549 if (test_bit(TST_SWITCH_WAIT, &card->tst_state)) {
1550 jump = base + card->tst_size - 2;
1551
1552 pc = readl(SAR_REG_NOW) >> 2;
1553 if ((pc ^ idle) & ~(card->tst_size - 1)) {
1554 mod_timer(&card->tst_timer, jiffies + 1);
1555 goto out;
1556 }
1557
1558 clear_bit(TST_SWITCH_WAIT, &card->tst_state);
1559
1560 card->tst_index ^= 1;
1561 write_sram(card, jump, TSTE_OPC_JMP | (base << 2));
1562
1563 base = card->tst[card->tst_index];
1564 idle = card->tst[card->tst_index ^ 1];
1565
1566 for (e = 0; e < card->tst_size - 2; e++) {
1567 if (card->soft_tst[e].tste & TSTE_PUSH_IDLE) {
1568 write_sram(card, idle + e,
1569 card->soft_tst[e].tste & TSTE_MASK);
1570 card->soft_tst[e].tste &= ~(TSTE_PUSH_IDLE);
1571 }
1572 }
1573 }
1574
1575 if (test_and_clear_bit(TST_SWITCH_PENDING, &card->tst_state)) {
1576
1577 for (e = 0; e < card->tst_size - 2; e++) {
1578 if (card->soft_tst[e].tste & TSTE_PUSH_ACTIVE) {
1579 write_sram(card, idle + e,
1580 card->soft_tst[e].tste & TSTE_MASK);
1581 card->soft_tst[e].tste &= ~(TSTE_PUSH_ACTIVE);
1582 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1583 }
1584 }
1585
1586 jump = base + card->tst_size - 2;
1587
1588 write_sram(card, jump, TSTE_OPC_NULL);
1589 set_bit(TST_SWITCH_WAIT, &card->tst_state);
1590
1591 mod_timer(&card->tst_timer, jiffies + 1);
1592 }
1593
1594 out:
1595 spin_unlock_irqrestore(&card->tst_lock, flags);
1596 }
1597
1598 static int
1599 __fill_tst(struct idt77252_dev *card, struct vc_map *vc,
1600 int n, unsigned int opc)
1601 {
1602 unsigned long cl, avail;
1603 unsigned long idle;
1604 int e, r;
1605 u32 data;
1606
1607 avail = card->tst_size - 2;
1608 for (e = 0; e < avail; e++) {
1609 if (card->soft_tst[e].vc == NULL)
1610 break;
1611 }
1612 if (e >= avail) {
1613 printk("%s: No free TST entries found\n", card->name);
1614 return -1;
1615 }
1616
1617 NPRINTK("%s: conn %d: first TST entry at %d.\n",
1618 card->name, vc ? vc->index : -1, e);
1619
1620 r = n;
1621 cl = avail;
1622 data = opc & TSTE_OPC_MASK;
1623 if (vc && (opc != TSTE_OPC_NULL))
1624 data = opc | vc->index;
1625
1626 idle = card->tst[card->tst_index ^ 1];
1627
1628 /*
1629 * Fill Soft TST.
1630 */
1631 while (r > 0) {
1632 if ((cl >= avail) && (card->soft_tst[e].vc == NULL)) {
1633 if (vc)
1634 card->soft_tst[e].vc = vc;
1635 else
1636 card->soft_tst[e].vc = (void *)-1;
1637
1638 card->soft_tst[e].tste = data;
1639 if (timer_pending(&card->tst_timer))
1640 card->soft_tst[e].tste |= TSTE_PUSH_ACTIVE;
1641 else {
1642 write_sram(card, idle + e, data);
1643 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1644 }
1645
1646 cl -= card->tst_size;
1647 r--;
1648 }
1649
1650 if (++e == avail)
1651 e = 0;
1652 cl += n;
1653 }
1654
1655 return 0;
1656 }
1657
1658 static int
1659 fill_tst(struct idt77252_dev *card, struct vc_map *vc, int n, unsigned int opc)
1660 {
1661 unsigned long flags;
1662 int res;
1663
1664 spin_lock_irqsave(&card->tst_lock, flags);
1665
1666 res = __fill_tst(card, vc, n, opc);
1667
1668 set_bit(TST_SWITCH_PENDING, &card->tst_state);
1669 if (!timer_pending(&card->tst_timer))
1670 mod_timer(&card->tst_timer, jiffies + 1);
1671
1672 spin_unlock_irqrestore(&card->tst_lock, flags);
1673 return res;
1674 }
1675
1676 static int
1677 __clear_tst(struct idt77252_dev *card, struct vc_map *vc)
1678 {
1679 unsigned long idle;
1680 int e;
1681
1682 idle = card->tst[card->tst_index ^ 1];
1683
1684 for (e = 0; e < card->tst_size - 2; e++) {
1685 if (card->soft_tst[e].vc == vc) {
1686 card->soft_tst[e].vc = NULL;
1687
1688 card->soft_tst[e].tste = TSTE_OPC_VAR;
1689 if (timer_pending(&card->tst_timer))
1690 card->soft_tst[e].tste |= TSTE_PUSH_ACTIVE;
1691 else {
1692 write_sram(card, idle + e, TSTE_OPC_VAR);
1693 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1694 }
1695 }
1696 }
1697
1698 return 0;
1699 }
1700
1701 static int
1702 clear_tst(struct idt77252_dev *card, struct vc_map *vc)
1703 {
1704 unsigned long flags;
1705 int res;
1706
1707 spin_lock_irqsave(&card->tst_lock, flags);
1708
1709 res = __clear_tst(card, vc);
1710
1711 set_bit(TST_SWITCH_PENDING, &card->tst_state);
1712 if (!timer_pending(&card->tst_timer))
1713 mod_timer(&card->tst_timer, jiffies + 1);
1714
1715 spin_unlock_irqrestore(&card->tst_lock, flags);
1716 return res;
1717 }
1718
1719 static int
1720 change_tst(struct idt77252_dev *card, struct vc_map *vc,
1721 int n, unsigned int opc)
1722 {
1723 unsigned long flags;
1724 int res;
1725
1726 spin_lock_irqsave(&card->tst_lock, flags);
1727
1728 __clear_tst(card, vc);
1729 res = __fill_tst(card, vc, n, opc);
1730
1731 set_bit(TST_SWITCH_PENDING, &card->tst_state);
1732 if (!timer_pending(&card->tst_timer))
1733 mod_timer(&card->tst_timer, jiffies + 1);
1734
1735 spin_unlock_irqrestore(&card->tst_lock, flags);
1736 return res;
1737 }
1738
1739
1740 static int
1741 set_tct(struct idt77252_dev *card, struct vc_map *vc)
1742 {
1743 unsigned long tct;
1744
1745 tct = (unsigned long) (card->tct_base + vc->index * SAR_SRAM_TCT_SIZE);
1746
1747 switch (vc->class) {
1748 case SCHED_CBR:
1749 OPRINTK("%s: writing TCT at 0x%lx, SCD 0x%lx.\n",
1750 card->name, tct, vc->scq->scd);
1751
1752 write_sram(card, tct + 0, TCT_CBR | vc->scq->scd);
1753 write_sram(card, tct + 1, 0);
1754 write_sram(card, tct + 2, 0);
1755 write_sram(card, tct + 3, 0);
1756 write_sram(card, tct + 4, 0);
1757 write_sram(card, tct + 5, 0);
1758 write_sram(card, tct + 6, 0);
1759 write_sram(card, tct + 7, 0);
1760 break;
1761
1762 case SCHED_UBR:
1763 OPRINTK("%s: writing TCT at 0x%lx, SCD 0x%lx.\n",
1764 card->name, tct, vc->scq->scd);
1765
1766 write_sram(card, tct + 0, TCT_UBR | vc->scq->scd);
1767 write_sram(card, tct + 1, 0);
1768 write_sram(card, tct + 2, TCT_TSIF);
1769 write_sram(card, tct + 3, TCT_HALT | TCT_IDLE);
1770 write_sram(card, tct + 4, 0);
1771 write_sram(card, tct + 5, vc->init_er);
1772 write_sram(card, tct + 6, 0);
1773 write_sram(card, tct + 7, TCT_FLAG_UBR);
1774 break;
1775
1776 case SCHED_VBR:
1777 case SCHED_ABR:
1778 default:
1779 return -ENOSYS;
1780 }
1781
1782 return 0;
1783 }
1784
1785 /*****************************************************************************/
1786 /* */
1787 /* FBQ Handling */
1788 /* */
1789 /*****************************************************************************/
1790
1791 static __inline__ int
1792 idt77252_fbq_level(struct idt77252_dev *card, int queue)
1793 {
1794 return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) & 0x0f;
1795 }
1796
1797 static __inline__ int
1798 idt77252_fbq_full(struct idt77252_dev *card, int queue)
1799 {
1800 return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) == 0x0f;
1801 }
1802
1803 static int
1804 push_rx_skb(struct idt77252_dev *card, struct sk_buff *skb, int queue)
1805 {
1806 unsigned long flags;
1807 u32 handle;
1808 u32 addr;
1809
1810 skb->data = skb->head;
1811 skb_reset_tail_pointer(skb);
1812 skb->len = 0;
1813
1814 skb_reserve(skb, 16);
1815
1816 switch (queue) {
1817 case 0:
1818 skb_put(skb, SAR_FB_SIZE_0);
1819 break;
1820 case 1:
1821 skb_put(skb, SAR_FB_SIZE_1);
1822 break;
1823 case 2:
1824 skb_put(skb, SAR_FB_SIZE_2);
1825 break;
1826 case 3:
1827 skb_put(skb, SAR_FB_SIZE_3);
1828 break;
1829 default:
1830 return -1;
1831 }
1832
1833 if (idt77252_fbq_full(card, queue))
1834 return -1;
1835
1836 memset(&skb->data[(skb->len & ~(0x3f)) - 64], 0, 2 * sizeof(u32));
1837
1838 handle = IDT77252_PRV_POOL(skb);
1839 addr = IDT77252_PRV_PADDR(skb);
1840
1841 spin_lock_irqsave(&card->cmd_lock, flags);
1842 writel(handle, card->fbq[queue]);
1843 writel(addr, card->fbq[queue]);
1844 spin_unlock_irqrestore(&card->cmd_lock, flags);
1845
1846 return 0;
1847 }
1848
1849 static void
1850 add_rx_skb(struct idt77252_dev *card, int queue,
1851 unsigned int size, unsigned int count)
1852 {
1853 struct sk_buff *skb;
1854 dma_addr_t paddr;
1855 u32 handle;
1856
1857 while (count--) {
1858 skb = dev_alloc_skb(size);
1859 if (!skb)
1860 return;
1861
1862 if (sb_pool_add(card, skb, queue)) {
1863 printk("%s: SB POOL full\n", __func__);
1864 goto outfree;
1865 }
1866
1867 paddr = pci_map_single(card->pcidev, skb->data,
1868 skb_end_pointer(skb) - skb->data,
1869 PCI_DMA_FROMDEVICE);
1870 IDT77252_PRV_PADDR(skb) = paddr;
1871
1872 if (push_rx_skb(card, skb, queue)) {
1873 printk("%s: FB QUEUE full\n", __func__);
1874 goto outunmap;
1875 }
1876 }
1877
1878 return;
1879
1880 outunmap:
1881 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
1882 skb_end_pointer(skb) - skb->data, PCI_DMA_FROMDEVICE);
1883
1884 handle = IDT77252_PRV_POOL(skb);
1885 card->sbpool[POOL_QUEUE(handle)].skb[POOL_INDEX(handle)] = NULL;
1886
1887 outfree:
1888 dev_kfree_skb(skb);
1889 }
1890
1891
1892 static void
1893 recycle_rx_skb(struct idt77252_dev *card, struct sk_buff *skb)
1894 {
1895 u32 handle = IDT77252_PRV_POOL(skb);
1896 int err;
1897
1898 pci_dma_sync_single_for_device(card->pcidev, IDT77252_PRV_PADDR(skb),
1899 skb_end_pointer(skb) - skb->data,
1900 PCI_DMA_FROMDEVICE);
1901
1902 err = push_rx_skb(card, skb, POOL_QUEUE(handle));
1903 if (err) {
1904 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
1905 skb_end_pointer(skb) - skb->data,
1906 PCI_DMA_FROMDEVICE);
1907 sb_pool_remove(card, skb);
1908 dev_kfree_skb(skb);
1909 }
1910 }
1911
1912 static void
1913 flush_rx_pool(struct idt77252_dev *card, struct rx_pool *rpp)
1914 {
1915 skb_queue_head_init(&rpp->queue);
1916 rpp->len = 0;
1917 }
1918
1919 static void
1920 recycle_rx_pool_skb(struct idt77252_dev *card, struct rx_pool *rpp)
1921 {
1922 struct sk_buff *skb, *tmp;
1923
1924 skb_queue_walk_safe(&rpp->queue, skb, tmp)
1925 recycle_rx_skb(card, skb);
1926
1927 flush_rx_pool(card, rpp);
1928 }
1929
1930 /*****************************************************************************/
1931 /* */
1932 /* ATM Interface */
1933 /* */
1934 /*****************************************************************************/
1935
1936 static void
1937 idt77252_phy_put(struct atm_dev *dev, unsigned char value, unsigned long addr)
1938 {
1939 write_utility(dev->dev_data, 0x100 + (addr & 0x1ff), value);
1940 }
1941
1942 static unsigned char
1943 idt77252_phy_get(struct atm_dev *dev, unsigned long addr)
1944 {
1945 return read_utility(dev->dev_data, 0x100 + (addr & 0x1ff));
1946 }
1947
1948 static inline int
1949 idt77252_send_skb(struct atm_vcc *vcc, struct sk_buff *skb, int oam)
1950 {
1951 struct atm_dev *dev = vcc->dev;
1952 struct idt77252_dev *card = dev->dev_data;
1953 struct vc_map *vc = vcc->dev_data;
1954 int err;
1955
1956 if (vc == NULL) {
1957 printk("%s: NULL connection in send().\n", card->name);
1958 atomic_inc(&vcc->stats->tx_err);
1959 dev_kfree_skb(skb);
1960 return -EINVAL;
1961 }
1962 if (!test_bit(VCF_TX, &vc->flags)) {
1963 printk("%s: Trying to transmit on a non-tx VC.\n", card->name);
1964 atomic_inc(&vcc->stats->tx_err);
1965 dev_kfree_skb(skb);
1966 return -EINVAL;
1967 }
1968
1969 switch (vcc->qos.aal) {
1970 case ATM_AAL0:
1971 case ATM_AAL1:
1972 case ATM_AAL5:
1973 break;
1974 default:
1975 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal);
1976 atomic_inc(&vcc->stats->tx_err);
1977 dev_kfree_skb(skb);
1978 return -EINVAL;
1979 }
1980
1981 if (skb_shinfo(skb)->nr_frags != 0) {
1982 printk("%s: No scatter-gather yet.\n", card->name);
1983 atomic_inc(&vcc->stats->tx_err);
1984 dev_kfree_skb(skb);
1985 return -EINVAL;
1986 }
1987 ATM_SKB(skb)->vcc = vcc;
1988
1989 err = queue_skb(card, vc, skb, oam);
1990 if (err) {
1991 atomic_inc(&vcc->stats->tx_err);
1992 dev_kfree_skb(skb);
1993 return err;
1994 }
1995
1996 return 0;
1997 }
1998
1999 static int idt77252_send(struct atm_vcc *vcc, struct sk_buff *skb)
2000 {
2001 return idt77252_send_skb(vcc, skb, 0);
2002 }
2003
2004 static int
2005 idt77252_send_oam(struct atm_vcc *vcc, void *cell, int flags)
2006 {
2007 struct atm_dev *dev = vcc->dev;
2008 struct idt77252_dev *card = dev->dev_data;
2009 struct sk_buff *skb;
2010
2011 skb = dev_alloc_skb(64);
2012 if (!skb) {
2013 printk("%s: Out of memory in send_oam().\n", card->name);
2014 atomic_inc(&vcc->stats->tx_err);
2015 return -ENOMEM;
2016 }
2017 atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
2018
2019 memcpy(skb_put(skb, 52), cell, 52);
2020
2021 return idt77252_send_skb(vcc, skb, 1);
2022 }
2023
2024 static __inline__ unsigned int
2025 idt77252_fls(unsigned int x)
2026 {
2027 int r = 1;
2028
2029 if (x == 0)
2030 return 0;
2031 if (x & 0xffff0000) {
2032 x >>= 16;
2033 r += 16;
2034 }
2035 if (x & 0xff00) {
2036 x >>= 8;
2037 r += 8;
2038 }
2039 if (x & 0xf0) {
2040 x >>= 4;
2041 r += 4;
2042 }
2043 if (x & 0xc) {
2044 x >>= 2;
2045 r += 2;
2046 }
2047 if (x & 0x2)
2048 r += 1;
2049 return r;
2050 }
2051
2052 static u16
2053 idt77252_int_to_atmfp(unsigned int rate)
2054 {
2055 u16 m, e;
2056
2057 if (rate == 0)
2058 return 0;
2059 e = idt77252_fls(rate) - 1;
2060 if (e < 9)
2061 m = (rate - (1 << e)) << (9 - e);
2062 else if (e == 9)
2063 m = (rate - (1 << e));
2064 else /* e > 9 */
2065 m = (rate - (1 << e)) >> (e - 9);
2066 return 0x4000 | (e << 9) | m;
2067 }
2068
2069 static u8
2070 idt77252_rate_logindex(struct idt77252_dev *card, int pcr)
2071 {
2072 u16 afp;
2073
2074 afp = idt77252_int_to_atmfp(pcr < 0 ? -pcr : pcr);
2075 if (pcr < 0)
2076 return rate_to_log[(afp >> 5) & 0x1ff];
2077 return rate_to_log[((afp >> 5) + 1) & 0x1ff];
2078 }
2079
2080 static void
2081 idt77252_est_timer(unsigned long data)
2082 {
2083 struct vc_map *vc = (struct vc_map *)data;
2084 struct idt77252_dev *card = vc->card;
2085 struct rate_estimator *est;
2086 unsigned long flags;
2087 u32 rate, cps;
2088 u64 ncells;
2089 u8 lacr;
2090
2091 spin_lock_irqsave(&vc->lock, flags);
2092 est = vc->estimator;
2093 if (!est)
2094 goto out;
2095
2096 ncells = est->cells;
2097
2098 rate = ((u32)(ncells - est->last_cells)) << (7 - est->interval);
2099 est->last_cells = ncells;
2100 est->avcps += ((long)rate - (long)est->avcps) >> est->ewma_log;
2101 est->cps = (est->avcps + 0x1f) >> 5;
2102
2103 cps = est->cps;
2104 if (cps < (est->maxcps >> 4))
2105 cps = est->maxcps >> 4;
2106
2107 lacr = idt77252_rate_logindex(card, cps);
2108 if (lacr > vc->max_er)
2109 lacr = vc->max_er;
2110
2111 if (lacr != vc->lacr) {
2112 vc->lacr = lacr;
2113 writel(TCMDQ_LACR|(vc->lacr << 16)|vc->index, SAR_REG_TCMDQ);
2114 }
2115
2116 est->timer.expires = jiffies + ((HZ / 4) << est->interval);
2117 add_timer(&est->timer);
2118
2119 out:
2120 spin_unlock_irqrestore(&vc->lock, flags);
2121 }
2122
2123 static struct rate_estimator *
2124 idt77252_init_est(struct vc_map *vc, int pcr)
2125 {
2126 struct rate_estimator *est;
2127
2128 est = kzalloc(sizeof(struct rate_estimator), GFP_KERNEL);
2129 if (!est)
2130 return NULL;
2131 est->maxcps = pcr < 0 ? -pcr : pcr;
2132 est->cps = est->maxcps;
2133 est->avcps = est->cps << 5;
2134
2135 est->interval = 2; /* XXX: make this configurable */
2136 est->ewma_log = 2; /* XXX: make this configurable */
2137 init_timer(&est->timer);
2138 est->timer.data = (unsigned long)vc;
2139 est->timer.function = idt77252_est_timer;
2140
2141 est->timer.expires = jiffies + ((HZ / 4) << est->interval);
2142 add_timer(&est->timer);
2143
2144 return est;
2145 }
2146
2147 static int
2148 idt77252_init_cbr(struct idt77252_dev *card, struct vc_map *vc,
2149 struct atm_vcc *vcc, struct atm_qos *qos)
2150 {
2151 int tst_free, tst_used, tst_entries;
2152 unsigned long tmpl, modl;
2153 int tcr, tcra;
2154
2155 if ((qos->txtp.max_pcr == 0) &&
2156 (qos->txtp.pcr == 0) && (qos->txtp.min_pcr == 0)) {
2157 printk("%s: trying to open a CBR VC with cell rate = 0\n",
2158 card->name);
2159 return -EINVAL;
2160 }
2161
2162 tst_used = 0;
2163 tst_free = card->tst_free;
2164 if (test_bit(VCF_TX, &vc->flags))
2165 tst_used = vc->ntste;
2166 tst_free += tst_used;
2167
2168 tcr = atm_pcr_goal(&qos->txtp);
2169 tcra = tcr >= 0 ? tcr : -tcr;
2170
2171 TXPRINTK("%s: CBR target cell rate = %d\n", card->name, tcra);
2172
2173 tmpl = (unsigned long) tcra * ((unsigned long) card->tst_size - 2);
2174 modl = tmpl % (unsigned long)card->utopia_pcr;
2175
2176 tst_entries = (int) (tmpl / card->utopia_pcr);
2177 if (tcr > 0) {
2178 if (modl > 0)
2179 tst_entries++;
2180 } else if (tcr == 0) {
2181 tst_entries = tst_free - SAR_TST_RESERVED;
2182 if (tst_entries <= 0) {
2183 printk("%s: no CBR bandwidth free.\n", card->name);
2184 return -ENOSR;
2185 }
2186 }
2187
2188 if (tst_entries == 0) {
2189 printk("%s: selected CBR bandwidth < granularity.\n",
2190 card->name);
2191 return -EINVAL;
2192 }
2193
2194 if (tst_entries > (tst_free - SAR_TST_RESERVED)) {
2195 printk("%s: not enough CBR bandwidth free.\n", card->name);
2196 return -ENOSR;
2197 }
2198
2199 vc->ntste = tst_entries;
2200
2201 card->tst_free = tst_free - tst_entries;
2202 if (test_bit(VCF_TX, &vc->flags)) {
2203 if (tst_used == tst_entries)
2204 return 0;
2205
2206 OPRINTK("%s: modify %d -> %d entries in TST.\n",
2207 card->name, tst_used, tst_entries);
2208 change_tst(card, vc, tst_entries, TSTE_OPC_CBR);
2209 return 0;
2210 }
2211
2212 OPRINTK("%s: setting %d entries in TST.\n", card->name, tst_entries);
2213 fill_tst(card, vc, tst_entries, TSTE_OPC_CBR);
2214 return 0;
2215 }
2216
2217 static int
2218 idt77252_init_ubr(struct idt77252_dev *card, struct vc_map *vc,
2219 struct atm_vcc *vcc, struct atm_qos *qos)
2220 {
2221 unsigned long flags;
2222 int tcr;
2223
2224 spin_lock_irqsave(&vc->lock, flags);
2225 if (vc->estimator) {
2226 del_timer(&vc->estimator->timer);
2227 kfree(vc->estimator);
2228 vc->estimator = NULL;
2229 }
2230 spin_unlock_irqrestore(&vc->lock, flags);
2231
2232 tcr = atm_pcr_goal(&qos->txtp);
2233 if (tcr == 0)
2234 tcr = card->link_pcr;
2235
2236 vc->estimator = idt77252_init_est(vc, tcr);
2237
2238 vc->class = SCHED_UBR;
2239 vc->init_er = idt77252_rate_logindex(card, tcr);
2240 vc->lacr = vc->init_er;
2241 if (tcr < 0)
2242 vc->max_er = vc->init_er;
2243 else
2244 vc->max_er = 0xff;
2245
2246 return 0;
2247 }
2248
2249 static int
2250 idt77252_init_tx(struct idt77252_dev *card, struct vc_map *vc,
2251 struct atm_vcc *vcc, struct atm_qos *qos)
2252 {
2253 int error;
2254
2255 if (test_bit(VCF_TX, &vc->flags))
2256 return -EBUSY;
2257
2258 switch (qos->txtp.traffic_class) {
2259 case ATM_CBR:
2260 vc->class = SCHED_CBR;
2261 break;
2262
2263 case ATM_UBR:
2264 vc->class = SCHED_UBR;
2265 break;
2266
2267 case ATM_VBR:
2268 case ATM_ABR:
2269 default:
2270 return -EPROTONOSUPPORT;
2271 }
2272
2273 vc->scq = alloc_scq(card, vc->class);
2274 if (!vc->scq) {
2275 printk("%s: can't get SCQ.\n", card->name);
2276 return -ENOMEM;
2277 }
2278
2279 vc->scq->scd = get_free_scd(card, vc);
2280 if (vc->scq->scd == 0) {
2281 printk("%s: no SCD available.\n", card->name);
2282 free_scq(card, vc->scq);
2283 return -ENOMEM;
2284 }
2285
2286 fill_scd(card, vc->scq, vc->class);
2287
2288 if (set_tct(card, vc)) {
2289 printk("%s: class %d not supported.\n",
2290 card->name, qos->txtp.traffic_class);
2291
2292 card->scd2vc[vc->scd_index] = NULL;
2293 free_scq(card, vc->scq);
2294 return -EPROTONOSUPPORT;
2295 }
2296
2297 switch (vc->class) {
2298 case SCHED_CBR:
2299 error = idt77252_init_cbr(card, vc, vcc, qos);
2300 if (error) {
2301 card->scd2vc[vc->scd_index] = NULL;
2302 free_scq(card, vc->scq);
2303 return error;
2304 }
2305
2306 clear_bit(VCF_IDLE, &vc->flags);
2307 writel(TCMDQ_START | vc->index, SAR_REG_TCMDQ);
2308 break;
2309
2310 case SCHED_UBR:
2311 error = idt77252_init_ubr(card, vc, vcc, qos);
2312 if (error) {
2313 card->scd2vc[vc->scd_index] = NULL;
2314 free_scq(card, vc->scq);
2315 return error;
2316 }
2317
2318 set_bit(VCF_IDLE, &vc->flags);
2319 break;
2320 }
2321
2322 vc->tx_vcc = vcc;
2323 set_bit(VCF_TX, &vc->flags);
2324 return 0;
2325 }
2326
2327 static int
2328 idt77252_init_rx(struct idt77252_dev *card, struct vc_map *vc,
2329 struct atm_vcc *vcc, struct atm_qos *qos)
2330 {
2331 unsigned long flags;
2332 unsigned long addr;
2333 u32 rcte = 0;
2334
2335 if (test_bit(VCF_RX, &vc->flags))
2336 return -EBUSY;
2337
2338 vc->rx_vcc = vcc;
2339 set_bit(VCF_RX, &vc->flags);
2340
2341 if ((vcc->vci == 3) || (vcc->vci == 4))
2342 return 0;
2343
2344 flush_rx_pool(card, &vc->rcv.rx_pool);
2345
2346 rcte |= SAR_RCTE_CONNECTOPEN;
2347 rcte |= SAR_RCTE_RAWCELLINTEN;
2348
2349 switch (qos->aal) {
2350 case ATM_AAL0:
2351 rcte |= SAR_RCTE_RCQ;
2352 break;
2353 case ATM_AAL1:
2354 rcte |= SAR_RCTE_OAM; /* Let SAR drop Video */
2355 break;
2356 case ATM_AAL34:
2357 rcte |= SAR_RCTE_AAL34;
2358 break;
2359 case ATM_AAL5:
2360 rcte |= SAR_RCTE_AAL5;
2361 break;
2362 default:
2363 rcte |= SAR_RCTE_RCQ;
2364 break;
2365 }
2366
2367 if (qos->aal != ATM_AAL5)
2368 rcte |= SAR_RCTE_FBP_1;
2369 else if (qos->rxtp.max_sdu > SAR_FB_SIZE_2)
2370 rcte |= SAR_RCTE_FBP_3;
2371 else if (qos->rxtp.max_sdu > SAR_FB_SIZE_1)
2372 rcte |= SAR_RCTE_FBP_2;
2373 else if (qos->rxtp.max_sdu > SAR_FB_SIZE_0)
2374 rcte |= SAR_RCTE_FBP_1;
2375 else
2376 rcte |= SAR_RCTE_FBP_01;
2377
2378 addr = card->rct_base + (vc->index << 2);
2379
2380 OPRINTK("%s: writing RCT at 0x%lx\n", card->name, addr);
2381 write_sram(card, addr, rcte);
2382
2383 spin_lock_irqsave(&card->cmd_lock, flags);
2384 writel(SAR_CMD_OPEN_CONNECTION | (addr << 2), SAR_REG_CMD);
2385 waitfor_idle(card);
2386 spin_unlock_irqrestore(&card->cmd_lock, flags);
2387
2388 return 0;
2389 }
2390
2391 static int
2392 idt77252_open(struct atm_vcc *vcc)
2393 {
2394 struct atm_dev *dev = vcc->dev;
2395 struct idt77252_dev *card = dev->dev_data;
2396 struct vc_map *vc;
2397 unsigned int index;
2398 unsigned int inuse;
2399 int error;
2400 int vci = vcc->vci;
2401 short vpi = vcc->vpi;
2402
2403 if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC)
2404 return 0;
2405
2406 if (vpi >= (1 << card->vpibits)) {
2407 printk("%s: unsupported VPI: %d\n", card->name, vpi);
2408 return -EINVAL;
2409 }
2410
2411 if (vci >= (1 << card->vcibits)) {
2412 printk("%s: unsupported VCI: %d\n", card->name, vci);
2413 return -EINVAL;
2414 }
2415
2416 set_bit(ATM_VF_ADDR, &vcc->flags);
2417
2418 mutex_lock(&card->mutex);
2419
2420 OPRINTK("%s: opening vpi.vci: %d.%d\n", card->name, vpi, vci);
2421
2422 switch (vcc->qos.aal) {
2423 case ATM_AAL0:
2424 case ATM_AAL1:
2425 case ATM_AAL5:
2426 break;
2427 default:
2428 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal);
2429 mutex_unlock(&card->mutex);
2430 return -EPROTONOSUPPORT;
2431 }
2432
2433 index = VPCI2VC(card, vpi, vci);
2434 if (!card->vcs[index]) {
2435 card->vcs[index] = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2436 if (!card->vcs[index]) {
2437 printk("%s: can't alloc vc in open()\n", card->name);
2438 mutex_unlock(&card->mutex);
2439 return -ENOMEM;
2440 }
2441 card->vcs[index]->card = card;
2442 card->vcs[index]->index = index;
2443
2444 spin_lock_init(&card->vcs[index]->lock);
2445 }
2446 vc = card->vcs[index];
2447
2448 vcc->dev_data = vc;
2449
2450 IPRINTK("%s: idt77252_open: vc = %d (%d.%d) %s/%s (max RX SDU: %u)\n",
2451 card->name, vc->index, vcc->vpi, vcc->vci,
2452 vcc->qos.rxtp.traffic_class != ATM_NONE ? "rx" : "--",
2453 vcc->qos.txtp.traffic_class != ATM_NONE ? "tx" : "--",
2454 vcc->qos.rxtp.max_sdu);
2455
2456 inuse = 0;
2457 if (vcc->qos.txtp.traffic_class != ATM_NONE &&
2458 test_bit(VCF_TX, &vc->flags))
2459 inuse = 1;
2460 if (vcc->qos.rxtp.traffic_class != ATM_NONE &&
2461 test_bit(VCF_RX, &vc->flags))
2462 inuse += 2;
2463
2464 if (inuse) {
2465 printk("%s: %s vci already in use.\n", card->name,
2466 inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx");
2467 mutex_unlock(&card->mutex);
2468 return -EADDRINUSE;
2469 }
2470
2471 if (vcc->qos.txtp.traffic_class != ATM_NONE) {
2472 error = idt77252_init_tx(card, vc, vcc, &vcc->qos);
2473 if (error) {
2474 mutex_unlock(&card->mutex);
2475 return error;
2476 }
2477 }
2478
2479 if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
2480 error = idt77252_init_rx(card, vc, vcc, &vcc->qos);
2481 if (error) {
2482 mutex_unlock(&card->mutex);
2483 return error;
2484 }
2485 }
2486
2487 set_bit(ATM_VF_READY, &vcc->flags);
2488
2489 mutex_unlock(&card->mutex);
2490 return 0;
2491 }
2492
2493 static void
2494 idt77252_close(struct atm_vcc *vcc)
2495 {
2496 struct atm_dev *dev = vcc->dev;
2497 struct idt77252_dev *card = dev->dev_data;
2498 struct vc_map *vc = vcc->dev_data;
2499 unsigned long flags;
2500 unsigned long addr;
2501 unsigned long timeout;
2502
2503 mutex_lock(&card->mutex);
2504
2505 IPRINTK("%s: idt77252_close: vc = %d (%d.%d)\n",
2506 card->name, vc->index, vcc->vpi, vcc->vci);
2507
2508 clear_bit(ATM_VF_READY, &vcc->flags);
2509
2510 if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
2511
2512 spin_lock_irqsave(&vc->lock, flags);
2513 clear_bit(VCF_RX, &vc->flags);
2514 vc->rx_vcc = NULL;
2515 spin_unlock_irqrestore(&vc->lock, flags);
2516
2517 if ((vcc->vci == 3) || (vcc->vci == 4))
2518 goto done;
2519
2520 addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE;
2521
2522 spin_lock_irqsave(&card->cmd_lock, flags);
2523 writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2), SAR_REG_CMD);
2524 waitfor_idle(card);
2525 spin_unlock_irqrestore(&card->cmd_lock, flags);
2526
2527 if (skb_queue_len(&vc->rcv.rx_pool.queue) != 0) {
2528 DPRINTK("%s: closing a VC with pending rx buffers.\n",
2529 card->name);
2530
2531 recycle_rx_pool_skb(card, &vc->rcv.rx_pool);
2532 }
2533 }
2534
2535 done:
2536 if (vcc->qos.txtp.traffic_class != ATM_NONE) {
2537
2538 spin_lock_irqsave(&vc->lock, flags);
2539 clear_bit(VCF_TX, &vc->flags);
2540 clear_bit(VCF_IDLE, &vc->flags);
2541 clear_bit(VCF_RSV, &vc->flags);
2542 vc->tx_vcc = NULL;
2543
2544 if (vc->estimator) {
2545 del_timer(&vc->estimator->timer);
2546 kfree(vc->estimator);
2547 vc->estimator = NULL;
2548 }
2549 spin_unlock_irqrestore(&vc->lock, flags);
2550
2551 timeout = 5 * 1000;
2552 while (atomic_read(&vc->scq->used) > 0) {
2553 timeout = msleep_interruptible(timeout);
2554 if (!timeout)
2555 break;
2556 }
2557 if (!timeout)
2558 printk("%s: SCQ drain timeout: %u used\n",
2559 card->name, atomic_read(&vc->scq->used));
2560
2561 writel(TCMDQ_HALT | vc->index, SAR_REG_TCMDQ);
2562 clear_scd(card, vc->scq, vc->class);
2563
2564 if (vc->class == SCHED_CBR) {
2565 clear_tst(card, vc);
2566 card->tst_free += vc->ntste;
2567 vc->ntste = 0;
2568 }
2569
2570 card->scd2vc[vc->scd_index] = NULL;
2571 free_scq(card, vc->scq);
2572 }
2573
2574 mutex_unlock(&card->mutex);
2575 }
2576
2577 static int
2578 idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos, int flags)
2579 {
2580 struct atm_dev *dev = vcc->dev;
2581 struct idt77252_dev *card = dev->dev_data;
2582 struct vc_map *vc = vcc->dev_data;
2583 int error = 0;
2584
2585 mutex_lock(&card->mutex);
2586
2587 if (qos->txtp.traffic_class != ATM_NONE) {
2588 if (!test_bit(VCF_TX, &vc->flags)) {
2589 error = idt77252_init_tx(card, vc, vcc, qos);
2590 if (error)
2591 goto out;
2592 } else {
2593 switch (qos->txtp.traffic_class) {
2594 case ATM_CBR:
2595 error = idt77252_init_cbr(card, vc, vcc, qos);
2596 if (error)
2597 goto out;
2598 break;
2599
2600 case ATM_UBR:
2601 error = idt77252_init_ubr(card, vc, vcc, qos);
2602 if (error)
2603 goto out;
2604
2605 if (!test_bit(VCF_IDLE, &vc->flags)) {
2606 writel(TCMDQ_LACR | (vc->lacr << 16) |
2607 vc->index, SAR_REG_TCMDQ);
2608 }
2609 break;
2610
2611 case ATM_VBR:
2612 case ATM_ABR:
2613 error = -EOPNOTSUPP;
2614 goto out;
2615 }
2616 }
2617 }
2618
2619 if ((qos->rxtp.traffic_class != ATM_NONE) &&
2620 !test_bit(VCF_RX, &vc->flags)) {
2621 error = idt77252_init_rx(card, vc, vcc, qos);
2622 if (error)
2623 goto out;
2624 }
2625
2626 memcpy(&vcc->qos, qos, sizeof(struct atm_qos));
2627
2628 set_bit(ATM_VF_HASQOS, &vcc->flags);
2629
2630 out:
2631 mutex_unlock(&card->mutex);
2632 return error;
2633 }
2634
2635 static int
2636 idt77252_proc_read(struct atm_dev *dev, loff_t * pos, char *page)
2637 {
2638 struct idt77252_dev *card = dev->dev_data;
2639 int i, left;
2640
2641 left = (int) *pos;
2642 if (!left--)
2643 return sprintf(page, "IDT77252 Interrupts:\n");
2644 if (!left--)
2645 return sprintf(page, "TSIF: %lu\n", card->irqstat[15]);
2646 if (!left--)
2647 return sprintf(page, "TXICP: %lu\n", card->irqstat[14]);
2648 if (!left--)
2649 return sprintf(page, "TSQF: %lu\n", card->irqstat[12]);
2650 if (!left--)
2651 return sprintf(page, "TMROF: %lu\n", card->irqstat[11]);
2652 if (!left--)
2653 return sprintf(page, "PHYI: %lu\n", card->irqstat[10]);
2654 if (!left--)
2655 return sprintf(page, "FBQ3A: %lu\n", card->irqstat[8]);
2656 if (!left--)
2657 return sprintf(page, "FBQ2A: %lu\n", card->irqstat[7]);
2658 if (!left--)
2659 return sprintf(page, "RSQF: %lu\n", card->irqstat[6]);
2660 if (!left--)
2661 return sprintf(page, "EPDU: %lu\n", card->irqstat[5]);
2662 if (!left--)
2663 return sprintf(page, "RAWCF: %lu\n", card->irqstat[4]);
2664 if (!left--)
2665 return sprintf(page, "FBQ1A: %lu\n", card->irqstat[3]);
2666 if (!left--)
2667 return sprintf(page, "FBQ0A: %lu\n", card->irqstat[2]);
2668 if (!left--)
2669 return sprintf(page, "RSQAF: %lu\n", card->irqstat[1]);
2670 if (!left--)
2671 return sprintf(page, "IDT77252 Transmit Connection Table:\n");
2672
2673 for (i = 0; i < card->tct_size; i++) {
2674 unsigned long tct;
2675 struct atm_vcc *vcc;
2676 struct vc_map *vc;
2677 char *p;
2678
2679 vc = card->vcs[i];
2680 if (!vc)
2681 continue;
2682
2683 vcc = NULL;
2684 if (vc->tx_vcc)
2685 vcc = vc->tx_vcc;
2686 if (!vcc)
2687 continue;
2688 if (left--)
2689 continue;
2690
2691 p = page;
2692 p += sprintf(p, " %4u: %u.%u: ", i, vcc->vpi, vcc->vci);
2693 tct = (unsigned long) (card->tct_base + i * SAR_SRAM_TCT_SIZE);
2694
2695 for (i = 0; i < 8; i++)
2696 p += sprintf(p, " %08x", read_sram(card, tct + i));
2697 p += sprintf(p, "\n");
2698 return p - page;
2699 }
2700 return 0;
2701 }
2702
2703 /*****************************************************************************/
2704 /* */
2705 /* Interrupt handler */
2706 /* */
2707 /*****************************************************************************/
2708
2709 static void
2710 idt77252_collect_stat(struct idt77252_dev *card)
2711 {
2712 u32 cdc, vpec, icc;
2713
2714 cdc = readl(SAR_REG_CDC);
2715 vpec = readl(SAR_REG_VPEC);
2716 icc = readl(SAR_REG_ICC);
2717
2718 #ifdef NOTDEF
2719 printk("%s:", card->name);
2720
2721 if (cdc & 0x7f0000) {
2722 char *s = "";
2723
2724 printk(" [");
2725 if (cdc & (1 << 22)) {
2726 printk("%sRM ID", s);
2727 s = " | ";
2728 }
2729 if (cdc & (1 << 21)) {
2730 printk("%sCON TAB", s);
2731 s = " | ";
2732 }
2733 if (cdc & (1 << 20)) {
2734 printk("%sNO FB", s);
2735 s = " | ";
2736 }
2737 if (cdc & (1 << 19)) {
2738 printk("%sOAM CRC", s);
2739 s = " | ";
2740 }
2741 if (cdc & (1 << 18)) {
2742 printk("%sRM CRC", s);
2743 s = " | ";
2744 }
2745 if (cdc & (1 << 17)) {
2746 printk("%sRM FIFO", s);
2747 s = " | ";
2748 }
2749 if (cdc & (1 << 16)) {
2750 printk("%sRX FIFO", s);
2751 s = " | ";
2752 }
2753 printk("]");
2754 }
2755
2756 printk(" CDC %04x, VPEC %04x, ICC: %04x\n",
2757 cdc & 0xffff, vpec & 0xffff, icc & 0xffff);
2758 #endif
2759 }
2760
2761 static irqreturn_t
2762 idt77252_interrupt(int irq, void *dev_id)
2763 {
2764 struct idt77252_dev *card = dev_id;
2765 u32 stat;
2766
2767 stat = readl(SAR_REG_STAT) & 0xffff;
2768 if (!stat) /* no interrupt for us */
2769 return IRQ_NONE;
2770
2771 if (test_and_set_bit(IDT77252_BIT_INTERRUPT, &card->flags)) {
2772 printk("%s: Re-entering irq_handler()\n", card->name);
2773 goto out;
2774 }
2775
2776 writel(stat, SAR_REG_STAT); /* reset interrupt */
2777
2778 if (stat & SAR_STAT_TSIF) { /* entry written to TSQ */
2779 INTPRINTK("%s: TSIF\n", card->name);
2780 card->irqstat[15]++;
2781 idt77252_tx(card);
2782 }
2783 if (stat & SAR_STAT_TXICP) { /* Incomplete CS-PDU has */
2784 INTPRINTK("%s: TXICP\n", card->name);
2785 card->irqstat[14]++;
2786 #ifdef CONFIG_ATM_IDT77252_DEBUG
2787 idt77252_tx_dump(card);
2788 #endif
2789 }
2790 if (stat & SAR_STAT_TSQF) { /* TSQ 7/8 full */
2791 INTPRINTK("%s: TSQF\n", card->name);
2792 card->irqstat[12]++;
2793 idt77252_tx(card);
2794 }
2795 if (stat & SAR_STAT_TMROF) { /* Timer overflow */
2796 INTPRINTK("%s: TMROF\n", card->name);
2797 card->irqstat[11]++;
2798 idt77252_collect_stat(card);
2799 }
2800
2801 if (stat & SAR_STAT_EPDU) { /* Got complete CS-PDU */
2802 INTPRINTK("%s: EPDU\n", card->name);
2803 card->irqstat[5]++;
2804 idt77252_rx(card);
2805 }
2806 if (stat & SAR_STAT_RSQAF) { /* RSQ is 7/8 full */
2807 INTPRINTK("%s: RSQAF\n", card->name);
2808 card->irqstat[1]++;
2809 idt77252_rx(card);
2810 }
2811 if (stat & SAR_STAT_RSQF) { /* RSQ is full */
2812 INTPRINTK("%s: RSQF\n", card->name);
2813 card->irqstat[6]++;
2814 idt77252_rx(card);
2815 }
2816 if (stat & SAR_STAT_RAWCF) { /* Raw cell received */
2817 INTPRINTK("%s: RAWCF\n", card->name);
2818 card->irqstat[4]++;
2819 idt77252_rx_raw(card);
2820 }
2821
2822 if (stat & SAR_STAT_PHYI) { /* PHY device interrupt */
2823 INTPRINTK("%s: PHYI", card->name);
2824 card->irqstat[10]++;
2825 if (card->atmdev->phy && card->atmdev->phy->interrupt)
2826 card->atmdev->phy->interrupt(card->atmdev);
2827 }
2828
2829 if (stat & (SAR_STAT_FBQ0A | SAR_STAT_FBQ1A |
2830 SAR_STAT_FBQ2A | SAR_STAT_FBQ3A)) {
2831
2832 writel(readl(SAR_REG_CFG) & ~(SAR_CFG_FBIE), SAR_REG_CFG);
2833
2834 INTPRINTK("%s: FBQA: %04x\n", card->name, stat);
2835
2836 if (stat & SAR_STAT_FBQ0A)
2837 card->irqstat[2]++;
2838 if (stat & SAR_STAT_FBQ1A)
2839 card->irqstat[3]++;
2840 if (stat & SAR_STAT_FBQ2A)
2841 card->irqstat[7]++;
2842 if (stat & SAR_STAT_FBQ3A)
2843 card->irqstat[8]++;
2844
2845 schedule_work(&card->tqueue);
2846 }
2847
2848 out:
2849 clear_bit(IDT77252_BIT_INTERRUPT, &card->flags);
2850 return IRQ_HANDLED;
2851 }
2852
2853 static void
2854 idt77252_softint(struct work_struct *work)
2855 {
2856 struct idt77252_dev *card =
2857 container_of(work, struct idt77252_dev, tqueue);
2858 u32 stat;
2859 int done;
2860
2861 for (done = 1; ; done = 1) {
2862 stat = readl(SAR_REG_STAT) >> 16;
2863
2864 if ((stat & 0x0f) < SAR_FBQ0_HIGH) {
2865 add_rx_skb(card, 0, SAR_FB_SIZE_0, 32);
2866 done = 0;
2867 }
2868
2869 stat >>= 4;
2870 if ((stat & 0x0f) < SAR_FBQ1_HIGH) {
2871 add_rx_skb(card, 1, SAR_FB_SIZE_1, 32);
2872 done = 0;
2873 }
2874
2875 stat >>= 4;
2876 if ((stat & 0x0f) < SAR_FBQ2_HIGH) {
2877 add_rx_skb(card, 2, SAR_FB_SIZE_2, 32);
2878 done = 0;
2879 }
2880
2881 stat >>= 4;
2882 if ((stat & 0x0f) < SAR_FBQ3_HIGH) {
2883 add_rx_skb(card, 3, SAR_FB_SIZE_3, 32);
2884 done = 0;
2885 }
2886
2887 if (done)
2888 break;
2889 }
2890
2891 writel(readl(SAR_REG_CFG) | SAR_CFG_FBIE, SAR_REG_CFG);
2892 }
2893
2894
2895 static int
2896 open_card_oam(struct idt77252_dev *card)
2897 {
2898 unsigned long flags;
2899 unsigned long addr;
2900 struct vc_map *vc;
2901 int vpi, vci;
2902 int index;
2903 u32 rcte;
2904
2905 for (vpi = 0; vpi < (1 << card->vpibits); vpi++) {
2906 for (vci = 3; vci < 5; vci++) {
2907 index = VPCI2VC(card, vpi, vci);
2908
2909 vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2910 if (!vc) {
2911 printk("%s: can't alloc vc\n", card->name);
2912 return -ENOMEM;
2913 }
2914 vc->index = index;
2915 card->vcs[index] = vc;
2916
2917 flush_rx_pool(card, &vc->rcv.rx_pool);
2918
2919 rcte = SAR_RCTE_CONNECTOPEN |
2920 SAR_RCTE_RAWCELLINTEN |
2921 SAR_RCTE_RCQ |
2922 SAR_RCTE_FBP_1;
2923
2924 addr = card->rct_base + (vc->index << 2);
2925 write_sram(card, addr, rcte);
2926
2927 spin_lock_irqsave(&card->cmd_lock, flags);
2928 writel(SAR_CMD_OPEN_CONNECTION | (addr << 2),
2929 SAR_REG_CMD);
2930 waitfor_idle(card);
2931 spin_unlock_irqrestore(&card->cmd_lock, flags);
2932 }
2933 }
2934
2935 return 0;
2936 }
2937
2938 static void
2939 close_card_oam(struct idt77252_dev *card)
2940 {
2941 unsigned long flags;
2942 unsigned long addr;
2943 struct vc_map *vc;
2944 int vpi, vci;
2945 int index;
2946
2947 for (vpi = 0; vpi < (1 << card->vpibits); vpi++) {
2948 for (vci = 3; vci < 5; vci++) {
2949 index = VPCI2VC(card, vpi, vci);
2950 vc = card->vcs[index];
2951
2952 addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE;
2953
2954 spin_lock_irqsave(&card->cmd_lock, flags);
2955 writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2),
2956 SAR_REG_CMD);
2957 waitfor_idle(card);
2958 spin_unlock_irqrestore(&card->cmd_lock, flags);
2959
2960 if (skb_queue_len(&vc->rcv.rx_pool.queue) != 0) {
2961 DPRINTK("%s: closing a VC "
2962 "with pending rx buffers.\n",
2963 card->name);
2964
2965 recycle_rx_pool_skb(card, &vc->rcv.rx_pool);
2966 }
2967 }
2968 }
2969 }
2970
2971 static int
2972 open_card_ubr0(struct idt77252_dev *card)
2973 {
2974 struct vc_map *vc;
2975
2976 vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2977 if (!vc) {
2978 printk("%s: can't alloc vc\n", card->name);
2979 return -ENOMEM;
2980 }
2981 card->vcs[0] = vc;
2982 vc->class = SCHED_UBR0;
2983
2984 vc->scq = alloc_scq(card, vc->class);
2985 if (!vc->scq) {
2986 printk("%s: can't get SCQ.\n", card->name);
2987 return -ENOMEM;
2988 }
2989
2990 card->scd2vc[0] = vc;
2991 vc->scd_index = 0;
2992 vc->scq->scd = card->scd_base;
2993
2994 fill_scd(card, vc->scq, vc->class);
2995
2996 write_sram(card, card->tct_base + 0, TCT_UBR | card->scd_base);
2997 write_sram(card, card->tct_base + 1, 0);
2998 write_sram(card, card->tct_base + 2, 0);
2999 write_sram(card, card->tct_base + 3, 0);
3000 write_sram(card, card->tct_base + 4, 0);
3001 write_sram(card, card->tct_base + 5, 0);
3002 write_sram(card, card->tct_base + 6, 0);
3003 write_sram(card, card->tct_base + 7, TCT_FLAG_UBR);
3004
3005 clear_bit(VCF_IDLE, &vc->flags);
3006 writel(TCMDQ_START | 0, SAR_REG_TCMDQ);
3007 return 0;
3008 }
3009
3010 static int
3011 idt77252_dev_open(struct idt77252_dev *card)
3012 {
3013 u32 conf;
3014
3015 if (!test_bit(IDT77252_BIT_INIT, &card->flags)) {
3016 printk("%s: SAR not yet initialized.\n", card->name);
3017 return -1;
3018 }
3019
3020 conf = SAR_CFG_RXPTH| /* enable receive path */
3021 SAR_RX_DELAY | /* interrupt on complete PDU */
3022 SAR_CFG_RAWIE | /* interrupt enable on raw cells */
3023 SAR_CFG_RQFIE | /* interrupt on RSQ almost full */
3024 SAR_CFG_TMOIE | /* interrupt on timer overflow */
3025 SAR_CFG_FBIE | /* interrupt on low free buffers */
3026 SAR_CFG_TXEN | /* transmit operation enable */
3027 SAR_CFG_TXINT | /* interrupt on transmit status */
3028 SAR_CFG_TXUIE | /* interrupt on transmit underrun */
3029 SAR_CFG_TXSFI | /* interrupt on TSQ almost full */
3030 SAR_CFG_PHYIE /* enable PHY interrupts */
3031 ;
3032
3033 #ifdef CONFIG_ATM_IDT77252_RCV_ALL
3034 /* Test RAW cell receive. */
3035 conf |= SAR_CFG_VPECA;
3036 #endif
3037
3038 writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG);
3039
3040 if (open_card_oam(card)) {
3041 printk("%s: Error initializing OAM.\n", card->name);
3042 return -1;
3043 }
3044
3045 if (open_card_ubr0(card)) {
3046 printk("%s: Error initializing UBR0.\n", card->name);
3047 return -1;
3048 }
3049
3050 IPRINTK("%s: opened IDT77252 ABR SAR.\n", card->name);
3051 return 0;
3052 }
3053
3054 static void idt77252_dev_close(struct atm_dev *dev)
3055 {
3056 struct idt77252_dev *card = dev->dev_data;
3057 u32 conf;
3058
3059 close_card_oam(card);
3060
3061 conf = SAR_CFG_RXPTH | /* enable receive path */
3062 SAR_RX_DELAY | /* interrupt on complete PDU */
3063 SAR_CFG_RAWIE | /* interrupt enable on raw cells */
3064 SAR_CFG_RQFIE | /* interrupt on RSQ almost full */
3065 SAR_CFG_TMOIE | /* interrupt on timer overflow */
3066 SAR_CFG_FBIE | /* interrupt on low free buffers */
3067 SAR_CFG_TXEN | /* transmit operation enable */
3068 SAR_CFG_TXINT | /* interrupt on transmit status */
3069 SAR_CFG_TXUIE | /* interrupt on xmit underrun */
3070 SAR_CFG_TXSFI /* interrupt on TSQ almost full */
3071 ;
3072
3073 writel(readl(SAR_REG_CFG) & ~(conf), SAR_REG_CFG);
3074
3075 DIPRINTK("%s: closed IDT77252 ABR SAR.\n", card->name);
3076 }
3077
3078
3079 /*****************************************************************************/
3080 /* */
3081 /* Initialisation and Deinitialization of IDT77252 */
3082 /* */
3083 /*****************************************************************************/
3084
3085
3086 static void
3087 deinit_card(struct idt77252_dev *card)
3088 {
3089 struct sk_buff *skb;
3090 int i, j;
3091
3092 if (!test_bit(IDT77252_BIT_INIT, &card->flags)) {
3093 printk("%s: SAR not yet initialized.\n", card->name);
3094 return;
3095 }
3096 DIPRINTK("idt77252: deinitialize card %u\n", card->index);
3097
3098 writel(0, SAR_REG_CFG);
3099
3100 if (card->atmdev)
3101 atm_dev_deregister(card->atmdev);
3102
3103 for (i = 0; i < 4; i++) {
3104 for (j = 0; j < FBQ_SIZE; j++) {
3105 skb = card->sbpool[i].skb[j];
3106 if (skb) {
3107 pci_unmap_single(card->pcidev,
3108 IDT77252_PRV_PADDR(skb),
3109 (skb_end_pointer(skb) -
3110 skb->data),
3111 PCI_DMA_FROMDEVICE);
3112 card->sbpool[i].skb[j] = NULL;
3113 dev_kfree_skb(skb);
3114 }
3115 }
3116 }
3117
3118 vfree(card->soft_tst);
3119
3120 vfree(card->scd2vc);
3121
3122 vfree(card->vcs);
3123
3124 if (card->raw_cell_hnd) {
3125 pci_free_consistent(card->pcidev, 2 * sizeof(u32),
3126 card->raw_cell_hnd, card->raw_cell_paddr);
3127 }
3128
3129 if (card->rsq.base) {
3130 DIPRINTK("%s: Release RSQ ...\n", card->name);
3131 deinit_rsq(card);
3132 }
3133
3134 if (card->tsq.base) {
3135 DIPRINTK("%s: Release TSQ ...\n", card->name);
3136 deinit_tsq(card);
3137 }
3138
3139 DIPRINTK("idt77252: Release IRQ.\n");
3140 free_irq(card->pcidev->irq, card);
3141
3142 for (i = 0; i < 4; i++) {
3143 if (card->fbq[i])
3144 iounmap(card->fbq[i]);
3145 }
3146
3147 if (card->membase)
3148 iounmap(card->membase);
3149
3150 clear_bit(IDT77252_BIT_INIT, &card->flags);
3151 DIPRINTK("%s: Card deinitialized.\n", card->name);
3152 }
3153
3154
3155 static int __devinit
3156 init_sram(struct idt77252_dev *card)
3157 {
3158 int i;
3159
3160 for (i = 0; i < card->sramsize; i += 4)
3161 write_sram(card, (i >> 2), 0);
3162
3163 /* set SRAM layout for THIS card */
3164 if (card->sramsize == (512 * 1024)) {
3165 card->tct_base = SAR_SRAM_TCT_128_BASE;
3166 card->tct_size = (SAR_SRAM_TCT_128_TOP - card->tct_base + 1)
3167 / SAR_SRAM_TCT_SIZE;
3168 card->rct_base = SAR_SRAM_RCT_128_BASE;
3169 card->rct_size = (SAR_SRAM_RCT_128_TOP - card->rct_base + 1)
3170 / SAR_SRAM_RCT_SIZE;
3171 card->rt_base = SAR_SRAM_RT_128_BASE;
3172 card->scd_base = SAR_SRAM_SCD_128_BASE;
3173 card->scd_size = (SAR_SRAM_SCD_128_TOP - card->scd_base + 1)
3174 / SAR_SRAM_SCD_SIZE;
3175 card->tst[0] = SAR_SRAM_TST1_128_BASE;
3176 card->tst[1] = SAR_SRAM_TST2_128_BASE;
3177 card->tst_size = SAR_SRAM_TST1_128_TOP - card->tst[0] + 1;
3178 card->abrst_base = SAR_SRAM_ABRSTD_128_BASE;
3179 card->abrst_size = SAR_ABRSTD_SIZE_8K;
3180 card->fifo_base = SAR_SRAM_FIFO_128_BASE;
3181 card->fifo_size = SAR_RXFD_SIZE_32K;
3182 } else {
3183 card->tct_base = SAR_SRAM_TCT_32_BASE;
3184 card->tct_size = (SAR_SRAM_TCT_32_TOP - card->tct_base + 1)
3185 / SAR_SRAM_TCT_SIZE;
3186 card->rct_base = SAR_SRAM_RCT_32_BASE;
3187 card->rct_size = (SAR_SRAM_RCT_32_TOP - card->rct_base + 1)
3188 / SAR_SRAM_RCT_SIZE;
3189 card->rt_base = SAR_SRAM_RT_32_BASE;
3190 card->scd_base = SAR_SRAM_SCD_32_BASE;
3191 card->scd_size = (SAR_SRAM_SCD_32_TOP - card->scd_base + 1)
3192 / SAR_SRAM_SCD_SIZE;
3193 card->tst[0] = SAR_SRAM_TST1_32_BASE;
3194 card->tst[1] = SAR_SRAM_TST2_32_BASE;
3195 card->tst_size = (SAR_SRAM_TST1_32_TOP - card->tst[0] + 1);
3196 card->abrst_base = SAR_SRAM_ABRSTD_32_BASE;
3197 card->abrst_size = SAR_ABRSTD_SIZE_1K;
3198 card->fifo_base = SAR_SRAM_FIFO_32_BASE;
3199 card->fifo_size = SAR_RXFD_SIZE_4K;
3200 }
3201
3202 /* Initialize TCT */
3203 for (i = 0; i < card->tct_size; i++) {
3204 write_sram(card, i * SAR_SRAM_TCT_SIZE + 0, 0);
3205 write_sram(card, i * SAR_SRAM_TCT_SIZE + 1, 0);
3206 write_sram(card, i * SAR_SRAM_TCT_SIZE + 2, 0);
3207 write_sram(card, i * SAR_SRAM_TCT_SIZE + 3, 0);
3208 write_sram(card, i * SAR_SRAM_TCT_SIZE + 4, 0);
3209 write_sram(card, i * SAR_SRAM_TCT_SIZE + 5, 0);
3210 write_sram(card, i * SAR_SRAM_TCT_SIZE + 6, 0);
3211 write_sram(card, i * SAR_SRAM_TCT_SIZE + 7, 0);
3212 }
3213
3214 /* Initialize RCT */
3215 for (i = 0; i < card->rct_size; i++) {
3216 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE,
3217 (u32) SAR_RCTE_RAWCELLINTEN);
3218 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 1,
3219 (u32) 0);
3220 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 2,
3221 (u32) 0);
3222 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 3,
3223 (u32) 0xffffffff);
3224 }
3225
3226 writel((SAR_FBQ0_LOW << 28) | 0x00000000 | 0x00000000 |
3227 (SAR_FB_SIZE_0 / 48), SAR_REG_FBQS0);
3228 writel((SAR_FBQ1_LOW << 28) | 0x00000000 | 0x00000000 |
3229 (SAR_FB_SIZE_1 / 48), SAR_REG_FBQS1);
3230 writel((SAR_FBQ2_LOW << 28) | 0x00000000 | 0x00000000 |
3231 (SAR_FB_SIZE_2 / 48), SAR_REG_FBQS2);
3232 writel((SAR_FBQ3_LOW << 28) | 0x00000000 | 0x00000000 |
3233 (SAR_FB_SIZE_3 / 48), SAR_REG_FBQS3);
3234
3235 /* Initialize rate table */
3236 for (i = 0; i < 256; i++) {
3237 write_sram(card, card->rt_base + i, log_to_rate[i]);
3238 }
3239
3240 for (i = 0; i < 128; i++) {
3241 unsigned int tmp;
3242
3243 tmp = rate_to_log[(i << 2) + 0] << 0;
3244 tmp |= rate_to_log[(i << 2) + 1] << 8;
3245 tmp |= rate_to_log[(i << 2) + 2] << 16;
3246 tmp |= rate_to_log[(i << 2) + 3] << 24;
3247 write_sram(card, card->rt_base + 256 + i, tmp);
3248 }
3249
3250 #if 0 /* Fill RDF and AIR tables. */
3251 for (i = 0; i < 128; i++) {
3252 unsigned int tmp;
3253
3254 tmp = RDF[0][(i << 1) + 0] << 16;
3255 tmp |= RDF[0][(i << 1) + 1] << 0;
3256 write_sram(card, card->rt_base + 512 + i, tmp);
3257 }
3258
3259 for (i = 0; i < 128; i++) {
3260 unsigned int tmp;
3261
3262 tmp = AIR[0][(i << 1) + 0] << 16;
3263 tmp |= AIR[0][(i << 1) + 1] << 0;
3264 write_sram(card, card->rt_base + 640 + i, tmp);
3265 }
3266 #endif
3267
3268 IPRINTK("%s: initialize rate table ...\n", card->name);
3269 writel(card->rt_base << 2, SAR_REG_RTBL);
3270
3271 /* Initialize TSTs */
3272 IPRINTK("%s: initialize TST ...\n", card->name);
3273 card->tst_free = card->tst_size - 2; /* last two are jumps */
3274
3275 for (i = card->tst[0]; i < card->tst[0] + card->tst_size - 2; i++)
3276 write_sram(card, i, TSTE_OPC_VAR);
3277 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2));
3278 idt77252_sram_write_errors = 1;
3279 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2));
3280 idt77252_sram_write_errors = 0;
3281 for (i = card->tst[1]; i < card->tst[1] + card->tst_size - 2; i++)
3282 write_sram(card, i, TSTE_OPC_VAR);
3283 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2));
3284 idt77252_sram_write_errors = 1;
3285 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2));
3286 idt77252_sram_write_errors = 0;
3287
3288 card->tst_index = 0;
3289 writel(card->tst[0] << 2, SAR_REG_TSTB);
3290
3291 /* Initialize ABRSTD and Receive FIFO */
3292 IPRINTK("%s: initialize ABRSTD ...\n", card->name);
3293 writel(card->abrst_size | (card->abrst_base << 2),
3294 SAR_REG_ABRSTD);
3295
3296 IPRINTK("%s: initialize receive fifo ...\n", card->name);
3297 writel(card->fifo_size | (card->fifo_base << 2),
3298 SAR_REG_RXFD);
3299
3300 IPRINTK("%s: SRAM initialization complete.\n", card->name);
3301 return 0;
3302 }
3303
3304 static int __devinit
3305 init_card(struct atm_dev *dev)
3306 {
3307 struct idt77252_dev *card = dev->dev_data;
3308 struct pci_dev *pcidev = card->pcidev;
3309 unsigned long tmpl, modl;
3310 unsigned int linkrate, rsvdcr;
3311 unsigned int tst_entries;
3312 struct net_device *tmp;
3313 char tname[10];
3314
3315 u32 size;
3316 u_char pci_byte;
3317 u32 conf;
3318 int i, k;
3319
3320 if (test_bit(IDT77252_BIT_INIT, &card->flags)) {
3321 printk("Error: SAR already initialized.\n");
3322 return -1;
3323 }
3324
3325 /*****************************************************************/
3326 /* P C I C O N F I G U R A T I O N */
3327 /*****************************************************************/
3328
3329 /* Set PCI Retry-Timeout and TRDY timeout */
3330 IPRINTK("%s: Checking PCI retries.\n", card->name);
3331 if (pci_read_config_byte(pcidev, 0x40, &pci_byte) != 0) {
3332 printk("%s: can't read PCI retry timeout.\n", card->name);
3333 deinit_card(card);
3334 return -1;
3335 }
3336 if (pci_byte != 0) {
3337 IPRINTK("%s: PCI retry timeout: %d, set to 0.\n",
3338 card->name, pci_byte);
3339 if (pci_write_config_byte(pcidev, 0x40, 0) != 0) {
3340 printk("%s: can't set PCI retry timeout.\n",
3341 card->name);
3342 deinit_card(card);
3343 return -1;
3344 }
3345 }
3346 IPRINTK("%s: Checking PCI TRDY.\n", card->name);
3347 if (pci_read_config_byte(pcidev, 0x41, &pci_byte) != 0) {
3348 printk("%s: can't read PCI TRDY timeout.\n", card->name);
3349 deinit_card(card);
3350 return -1;
3351 }
3352 if (pci_byte != 0) {
3353 IPRINTK("%s: PCI TRDY timeout: %d, set to 0.\n",
3354 card->name, pci_byte);
3355 if (pci_write_config_byte(pcidev, 0x41, 0) != 0) {
3356 printk("%s: can't set PCI TRDY timeout.\n", card->name);
3357 deinit_card(card);
3358 return -1;
3359 }
3360 }
3361 /* Reset Timer register */
3362 if (readl(SAR_REG_STAT) & SAR_STAT_TMROF) {
3363 printk("%s: resetting timer overflow.\n", card->name);
3364 writel(SAR_STAT_TMROF, SAR_REG_STAT);
3365 }
3366 IPRINTK("%s: Request IRQ ... ", card->name);
3367 if (request_irq(pcidev->irq, idt77252_interrupt, IRQF_DISABLED|IRQF_SHARED,
3368 card->name, card) != 0) {
3369 printk("%s: can't allocate IRQ.\n", card->name);
3370 deinit_card(card);
3371 return -1;
3372 }
3373 IPRINTK("got %d.\n", pcidev->irq);
3374
3375 /*****************************************************************/
3376 /* C H E C K A N D I N I T S R A M */
3377 /*****************************************************************/
3378
3379 IPRINTK("%s: Initializing SRAM\n", card->name);
3380
3381 /* preset size of connecton table, so that init_sram() knows about it */
3382 conf = SAR_CFG_TX_FIFO_SIZE_9 | /* Use maximum fifo size */
3383 SAR_CFG_RXSTQ_SIZE_8k | /* Receive Status Queue is 8k */
3384 SAR_CFG_IDLE_CLP | /* Set CLP on idle cells */
3385 #ifndef ATM_IDT77252_SEND_IDLE
3386 SAR_CFG_NO_IDLE | /* Do not send idle cells */
3387 #endif
3388 0;
3389
3390 if (card->sramsize == (512 * 1024))
3391 conf |= SAR_CFG_CNTBL_1k;
3392 else
3393 conf |= SAR_CFG_CNTBL_512;
3394
3395 switch (vpibits) {
3396 case 0:
3397 conf |= SAR_CFG_VPVCS_0;
3398 break;
3399 default:
3400 case 1:
3401 conf |= SAR_CFG_VPVCS_1;
3402 break;
3403 case 2:
3404 conf |= SAR_CFG_VPVCS_2;
3405 break;
3406 case 8:
3407 conf |= SAR_CFG_VPVCS_8;
3408 break;
3409 }
3410
3411 writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG);
3412
3413 if (init_sram(card) < 0)
3414 return -1;
3415
3416 /********************************************************************/
3417 /* 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 */
3418 /********************************************************************/
3419 /* Initialize TSQ */
3420 if (0 != init_tsq(card)) {
3421 deinit_card(card);
3422 return -1;
3423 }
3424 /* Initialize RSQ */
3425 if (0 != init_rsq(card)) {
3426 deinit_card(card);
3427 return -1;
3428 }
3429
3430 card->vpibits = vpibits;
3431 if (card->sramsize == (512 * 1024)) {
3432 card->vcibits = 10 - card->vpibits;
3433 } else {
3434 card->vcibits = 9 - card->vpibits;
3435 }
3436
3437 card->vcimask = 0;
3438 for (k = 0, i = 1; k < card->vcibits; k++) {
3439 card->vcimask |= i;
3440 i <<= 1;
3441 }
3442
3443 IPRINTK("%s: Setting VPI/VCI mask to zero.\n", card->name);
3444 writel(0, SAR_REG_VPM);
3445
3446 /* Little Endian Order */
3447 writel(0, SAR_REG_GP);
3448
3449 /* Initialize RAW Cell Handle Register */
3450 card->raw_cell_hnd = pci_alloc_consistent(card->pcidev, 2 * sizeof(u32),
3451 &card->raw_cell_paddr);
3452 if (!card->raw_cell_hnd) {
3453 printk("%s: memory allocation failure.\n", card->name);
3454 deinit_card(card);
3455 return -1;
3456 }
3457 memset(card->raw_cell_hnd, 0, 2 * sizeof(u32));
3458 writel(card->raw_cell_paddr, SAR_REG_RAWHND);
3459 IPRINTK("%s: raw cell handle is at 0x%p.\n", card->name,
3460 card->raw_cell_hnd);
3461
3462 size = sizeof(struct vc_map *) * card->tct_size;
3463 IPRINTK("%s: allocate %d byte for VC map.\n", card->name, size);
3464 if (NULL == (card->vcs = vmalloc(size))) {
3465 printk("%s: memory allocation failure.\n", card->name);
3466 deinit_card(card);
3467 return -1;
3468 }
3469 memset(card->vcs, 0, size);
3470
3471 size = sizeof(struct vc_map *) * card->scd_size;
3472 IPRINTK("%s: allocate %d byte for SCD to VC mapping.\n",
3473 card->name, size);
3474 if (NULL == (card->scd2vc = vmalloc(size))) {
3475 printk("%s: memory allocation failure.\n", card->name);
3476 deinit_card(card);
3477 return -1;
3478 }
3479 memset(card->scd2vc, 0, size);
3480
3481 size = sizeof(struct tst_info) * (card->tst_size - 2);
3482 IPRINTK("%s: allocate %d byte for TST to VC mapping.\n",
3483 card->name, size);
3484 if (NULL == (card->soft_tst = vmalloc(size))) {
3485 printk("%s: memory allocation failure.\n", card->name);
3486 deinit_card(card);
3487 return -1;
3488 }
3489 for (i = 0; i < card->tst_size - 2; i++) {
3490 card->soft_tst[i].tste = TSTE_OPC_VAR;
3491 card->soft_tst[i].vc = NULL;
3492 }
3493
3494 if (dev->phy == NULL) {
3495 printk("%s: No LT device defined.\n", card->name);
3496 deinit_card(card);
3497 return -1;
3498 }
3499 if (dev->phy->ioctl == NULL) {
3500 printk("%s: LT had no IOCTL funtion defined.\n", card->name);
3501 deinit_card(card);
3502 return -1;
3503 }
3504
3505 #ifdef CONFIG_ATM_IDT77252_USE_SUNI
3506 /*
3507 * this is a jhs hack to get around special functionality in the
3508 * phy driver for the atecom hardware; the functionality doesn't
3509 * exist in the linux atm suni driver
3510 *
3511 * it isn't the right way to do things, but as the guy from NIST
3512 * said, talking about their measurement of the fine structure
3513 * constant, "it's good enough for government work."
3514 */
3515 linkrate = 149760000;
3516 #endif
3517
3518 card->link_pcr = (linkrate / 8 / 53);
3519 printk("%s: Linkrate on ATM line : %u bit/s, %u cell/s.\n",
3520 card->name, linkrate, card->link_pcr);
3521
3522 #ifdef ATM_IDT77252_SEND_IDLE
3523 card->utopia_pcr = card->link_pcr;
3524 #else
3525 card->utopia_pcr = (160000000 / 8 / 54);
3526 #endif
3527
3528 rsvdcr = 0;
3529 if (card->utopia_pcr > card->link_pcr)
3530 rsvdcr = card->utopia_pcr - card->link_pcr;
3531
3532 tmpl = (unsigned long) rsvdcr * ((unsigned long) card->tst_size - 2);
3533 modl = tmpl % (unsigned long)card->utopia_pcr;
3534 tst_entries = (int) (tmpl / (unsigned long)card->utopia_pcr);
3535 if (modl)
3536 tst_entries++;
3537 card->tst_free -= tst_entries;
3538 fill_tst(card, NULL, tst_entries, TSTE_OPC_NULL);
3539
3540 #ifdef HAVE_EEPROM
3541 idt77252_eeprom_init(card);
3542 printk("%s: EEPROM: %02x:", card->name,
3543 idt77252_eeprom_read_status(card));
3544
3545 for (i = 0; i < 0x80; i++) {
3546 printk(" %02x",
3547 idt77252_eeprom_read_byte(card, i)
3548 );
3549 }
3550 printk("\n");
3551 #endif /* HAVE_EEPROM */
3552
3553 /*
3554 * XXX: <hack>
3555 */
3556 sprintf(tname, "eth%d", card->index);
3557 tmp = dev_get_by_name(&init_net, tname); /* jhs: was "tmp = dev_get(tname);" */
3558 if (tmp) {
3559 memcpy(card->atmdev->esi, tmp->dev_addr, 6);
3560
3561 printk("%s: ESI %pM\n", card->name, card->atmdev->esi);
3562 }
3563 /*
3564 * XXX: </hack>
3565 */
3566
3567 /* Set Maximum Deficit Count for now. */
3568 writel(0xffff, SAR_REG_MDFCT);
3569
3570 set_bit(IDT77252_BIT_INIT, &card->flags);
3571
3572 XPRINTK("%s: IDT77252 ABR SAR initialization complete.\n", card->name);
3573 return 0;
3574 }
3575
3576
3577 /*****************************************************************************/
3578 /* */
3579 /* Probing of IDT77252 ABR SAR */
3580 /* */
3581 /*****************************************************************************/
3582
3583
3584 static int __devinit
3585 idt77252_preset(struct idt77252_dev *card)
3586 {
3587 u16 pci_command;
3588
3589 /*****************************************************************/
3590 /* P C I C O N F I G U R A T I O N */
3591 /*****************************************************************/
3592
3593 XPRINTK("%s: Enable PCI master and memory access for SAR.\n",
3594 card->name);
3595 if (pci_read_config_word(card->pcidev, PCI_COMMAND, &pci_command)) {
3596 printk("%s: can't read PCI_COMMAND.\n", card->name);
3597 deinit_card(card);
3598 return -1;
3599 }
3600 if (!(pci_command & PCI_COMMAND_IO)) {
3601 printk("%s: PCI_COMMAND: %04x (???)\n",
3602 card->name, pci_command);
3603 deinit_card(card);
3604 return (-1);
3605 }
3606 pci_command |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
3607 if (pci_write_config_word(card->pcidev, PCI_COMMAND, pci_command)) {
3608 printk("%s: can't write PCI_COMMAND.\n", card->name);
3609 deinit_card(card);
3610 return -1;
3611 }
3612 /*****************************************************************/
3613 /* G E N E R I C R E S E T */
3614 /*****************************************************************/
3615
3616 /* Software reset */
3617 writel(SAR_CFG_SWRST, SAR_REG_CFG);
3618 mdelay(1);
3619 writel(0, SAR_REG_CFG);
3620
3621 IPRINTK("%s: Software resetted.\n", card->name);
3622 return 0;
3623 }
3624
3625
3626 static unsigned long __devinit
3627 probe_sram(struct idt77252_dev *card)
3628 {
3629 u32 data, addr;
3630
3631 writel(0, SAR_REG_DR0);
3632 writel(SAR_CMD_WRITE_SRAM | (0 << 2), SAR_REG_CMD);
3633
3634 for (addr = 0x4000; addr < 0x80000; addr += 0x4000) {
3635 writel(ATM_POISON, SAR_REG_DR0);
3636 writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD);
3637
3638 writel(SAR_CMD_READ_SRAM | (0 << 2), SAR_REG_CMD);
3639 data = readl(SAR_REG_DR0);
3640
3641 if (data != 0)
3642 break;
3643 }
3644
3645 return addr * sizeof(u32);
3646 }
3647
3648 static int __devinit
3649 idt77252_init_one(struct pci_dev *pcidev, const struct pci_device_id *id)
3650 {
3651 static struct idt77252_dev **last = &idt77252_chain;
3652 static int index = 0;
3653
3654 unsigned long membase, srambase;
3655 struct idt77252_dev *card;
3656 struct atm_dev *dev;
3657 int i, err;
3658
3659
3660 if ((err = pci_enable_device(pcidev))) {
3661 printk("idt77252: can't enable PCI device at %s\n", pci_name(pcidev));
3662 return err;
3663 }
3664
3665 card = kzalloc(sizeof(struct idt77252_dev), GFP_KERNEL);
3666 if (!card) {
3667 printk("idt77252-%d: can't allocate private data\n", index);
3668 err = -ENOMEM;
3669 goto err_out_disable_pdev;
3670 }
3671 card->revision = pcidev->revision;
3672 card->index = index;
3673 card->pcidev = pcidev;
3674 sprintf(card->name, "idt77252-%d", card->index);
3675
3676 INIT_WORK(&card->tqueue, idt77252_softint);
3677
3678 membase = pci_resource_start(pcidev, 1);
3679 srambase = pci_resource_start(pcidev, 2);
3680
3681 mutex_init(&card->mutex);
3682 spin_lock_init(&card->cmd_lock);
3683 spin_lock_init(&card->tst_lock);
3684
3685 init_timer(&card->tst_timer);
3686 card->tst_timer.data = (unsigned long)card;
3687 card->tst_timer.function = tst_timer;
3688
3689 /* Do the I/O remapping... */
3690 card->membase = ioremap(membase, 1024);
3691 if (!card->membase) {
3692 printk("%s: can't ioremap() membase\n", card->name);
3693 err = -EIO;
3694 goto err_out_free_card;
3695 }
3696
3697 if (idt77252_preset(card)) {
3698 printk("%s: preset failed\n", card->name);
3699 err = -EIO;
3700 goto err_out_iounmap;
3701 }
3702
3703 dev = atm_dev_register("idt77252", &idt77252_ops, -1, NULL);
3704 if (!dev) {
3705 printk("%s: can't register atm device\n", card->name);
3706 err = -EIO;
3707 goto err_out_iounmap;
3708 }
3709 dev->dev_data = card;
3710 card->atmdev = dev;
3711
3712 #ifdef CONFIG_ATM_IDT77252_USE_SUNI
3713 suni_init(dev);
3714 if (!dev->phy) {
3715 printk("%s: can't init SUNI\n", card->name);
3716 err = -EIO;
3717 goto err_out_deinit_card;
3718 }
3719 #endif /* CONFIG_ATM_IDT77252_USE_SUNI */
3720
3721 card->sramsize = probe_sram(card);
3722
3723 for (i = 0; i < 4; i++) {
3724 card->fbq[i] = ioremap(srambase | 0x200000 | (i << 18), 4);
3725 if (!card->fbq[i]) {
3726 printk("%s: can't ioremap() FBQ%d\n", card->name, i);
3727 err = -EIO;
3728 goto err_out_deinit_card;
3729 }
3730 }
3731
3732 printk("%s: ABR SAR (Rev %c): MEM %08lx SRAM %08lx [%u KB]\n",
3733 card->name, ((card->revision > 1) && (card->revision < 25)) ?
3734 'A' + card->revision - 1 : '?', membase, srambase,
3735 card->sramsize / 1024);
3736
3737 if (init_card(dev)) {
3738 printk("%s: init_card failed\n", card->name);
3739 err = -EIO;
3740 goto err_out_deinit_card;
3741 }
3742
3743 dev->ci_range.vpi_bits = card->vpibits;
3744 dev->ci_range.vci_bits = card->vcibits;
3745 dev->link_rate = card->link_pcr;
3746
3747 if (dev->phy->start)
3748 dev->phy->start(dev);
3749
3750 if (idt77252_dev_open(card)) {
3751 printk("%s: dev_open failed\n", card->name);
3752 err = -EIO;
3753 goto err_out_stop;
3754 }
3755
3756 *last = card;
3757 last = &card->next;
3758 index++;
3759
3760 return 0;
3761
3762 err_out_stop:
3763 if (dev->phy->stop)
3764 dev->phy->stop(dev);
3765
3766 err_out_deinit_card:
3767 deinit_card(card);
3768
3769 err_out_iounmap:
3770 iounmap(card->membase);
3771
3772 err_out_free_card:
3773 kfree(card);
3774
3775 err_out_disable_pdev:
3776 pci_disable_device(pcidev);
3777 return err;
3778 }
3779
3780 static struct pci_device_id idt77252_pci_tbl[] =
3781 {
3782 { PCI_VENDOR_ID_IDT, PCI_DEVICE_ID_IDT_IDT77252,
3783 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
3784 { 0, }
3785 };
3786
3787 MODULE_DEVICE_TABLE(pci, idt77252_pci_tbl);
3788
3789 static struct pci_driver idt77252_driver = {
3790 .name = "idt77252",
3791 .id_table = idt77252_pci_tbl,
3792 .probe = idt77252_init_one,
3793 };
3794
3795 static int __init idt77252_init(void)
3796 {
3797 struct sk_buff *skb;
3798
3799 printk("%s: at %p\n", __func__, idt77252_init);
3800
3801 if (sizeof(skb->cb) < sizeof(struct atm_skb_data) +
3802 sizeof(struct idt77252_skb_prv)) {
3803 printk(KERN_ERR "%s: skb->cb is too small (%lu < %lu)\n",
3804 __func__, (unsigned long) sizeof(skb->cb),
3805 (unsigned long) sizeof(struct atm_skb_data) +
3806 sizeof(struct idt77252_skb_prv));
3807 return -EIO;
3808 }
3809
3810 return pci_register_driver(&idt77252_driver);
3811 }
3812
3813 static void __exit idt77252_exit(void)
3814 {
3815 struct idt77252_dev *card;
3816 struct atm_dev *dev;
3817
3818 pci_unregister_driver(&idt77252_driver);
3819
3820 while (idt77252_chain) {
3821 card = idt77252_chain;
3822 dev = card->atmdev;
3823 idt77252_chain = card->next;
3824
3825 if (dev->phy->stop)
3826 dev->phy->stop(dev);
3827 deinit_card(card);
3828 pci_disable_device(card->pcidev);
3829 kfree(card);
3830 }
3831
3832 DIPRINTK("idt77252: finished cleanup-module().\n");
3833 }
3834
3835 module_init(idt77252_init);
3836 module_exit(idt77252_exit);
3837
3838 MODULE_LICENSE("GPL");
3839
3840 module_param(vpibits, uint, 0);
3841 MODULE_PARM_DESC(vpibits, "number of VPI bits supported (0, 1, or 2)");
3842 #ifdef CONFIG_ATM_IDT77252_DEBUG
3843 module_param(debug, ulong, 0644);
3844 MODULE_PARM_DESC(debug, "debug bitmap, see drivers/atm/idt77252.h");
3845 #endif
3846
3847 MODULE_AUTHOR("Eddie C. Dost <ecd@atecom.com>");
3848 MODULE_DESCRIPTION("IDT77252 ABR SAR Driver");
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