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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / atm / idt77252.c
blobdf51680e89319c44fb904dd1f0d9635a4e1eb4cb
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/interrupt.h>
41 #include <linux/bitops.h>
42 #include <linux/wait.h>
43 #include <linux/jiffies.h>
44 #include <linux/mutex.h>
45 #include <linux/slab.h>
46
47 #include <asm/io.h>
48 #include <linux/uaccess.h>
49 #include <linux/atomic.h>
50 #include <asm/byteorder.h>
51
52 #ifdef CONFIG_ATM_IDT77252_USE_SUNI
53 #include "suni.h"
54 #endif /* CONFIG_ATM_IDT77252_USE_SUNI */
55
56
57 #include "idt77252.h"
58 #include "idt77252_tables.h"
59
60 static unsigned int vpibits = 1;
61
62
63 #define ATM_IDT77252_SEND_IDLE 1
64
65
66 /*
67 * Debug HACKs.
68 */
69 #define DEBUG_MODULE 1
70 #undef HAVE_EEPROM /* does not work, yet. */
71
72 #ifdef CONFIG_ATM_IDT77252_DEBUG
73 static unsigned long debug = DBG_GENERAL;
74 #endif
75
76
77 #define SAR_RX_DELAY (SAR_CFG_RXINT_NODELAY)
78
79
80 /*
81 * SCQ Handling.
82 */
83 static struct scq_info *alloc_scq(struct idt77252_dev *, int);
84 static void free_scq(struct idt77252_dev *, struct scq_info *);
85 static int queue_skb(struct idt77252_dev *, struct vc_map *,
86 struct sk_buff *, int oam);
87 static void drain_scq(struct idt77252_dev *, struct vc_map *);
88 static unsigned long get_free_scd(struct idt77252_dev *, struct vc_map *);
89 static void fill_scd(struct idt77252_dev *, struct scq_info *, int);
90
91 /*
92 * FBQ Handling.
93 */
94 static int push_rx_skb(struct idt77252_dev *,
95 struct sk_buff *, int queue);
96 static void recycle_rx_skb(struct idt77252_dev *, struct sk_buff *);
97 static void flush_rx_pool(struct idt77252_dev *, struct rx_pool *);
98 static void recycle_rx_pool_skb(struct idt77252_dev *,
99 struct rx_pool *);
100 static void add_rx_skb(struct idt77252_dev *, int queue,
101 unsigned int size, unsigned int count);
102
103 /*
104 * RSQ Handling.
105 */
106 static int init_rsq(struct idt77252_dev *);
107 static void deinit_rsq(struct idt77252_dev *);
108 static void idt77252_rx(struct idt77252_dev *);
109
110 /*
111 * TSQ handling.
112 */
113 static int init_tsq(struct idt77252_dev *);
114 static void deinit_tsq(struct idt77252_dev *);
115 static void idt77252_tx(struct idt77252_dev *);
116
117
118 /*
119 * ATM Interface.
120 */
121 static void idt77252_dev_close(struct atm_dev *dev);
122 static int idt77252_open(struct atm_vcc *vcc);
123 static void idt77252_close(struct atm_vcc *vcc);
124 static int idt77252_send(struct atm_vcc *vcc, struct sk_buff *skb);
125 static int idt77252_send_oam(struct atm_vcc *vcc, void *cell,
126 int flags);
127 static void idt77252_phy_put(struct atm_dev *dev, unsigned char value,
128 unsigned long addr);
129 static unsigned char idt77252_phy_get(struct atm_dev *dev, unsigned long addr);
130 static int idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos,
131 int flags);
132 static int idt77252_proc_read(struct atm_dev *dev, loff_t * pos,
133 char *page);
134 static void idt77252_softint(struct work_struct *work);
135
136
137 static const struct atmdev_ops idt77252_ops =
138 {
139 .dev_close = idt77252_dev_close,
140 .open = idt77252_open,
141 .close = idt77252_close,
142 .send = idt77252_send,
143 .send_oam = idt77252_send_oam,
144 .phy_put = idt77252_phy_put,
145 .phy_get = idt77252_phy_get,
146 .change_qos = idt77252_change_qos,
147 .proc_read = idt77252_proc_read,
148 .owner = THIS_MODULE
149 };
150
151 static struct idt77252_dev *idt77252_chain = NULL;
152 static unsigned int idt77252_sram_write_errors = 0;
153
154 /*****************************************************************************/
155 /* */
156 /* I/O and Utility Bus */
157 /* */
158 /*****************************************************************************/
159
160 static void
161 waitfor_idle(struct idt77252_dev *card)
162 {
163 u32 stat;
164
165 stat = readl(SAR_REG_STAT);
166 while (stat & SAR_STAT_CMDBZ)
167 stat = readl(SAR_REG_STAT);
168 }
169
170 static u32
171 read_sram(struct idt77252_dev *card, unsigned long addr)
172 {
173 unsigned long flags;
174 u32 value;
175
176 spin_lock_irqsave(&card->cmd_lock, flags);
177 writel(SAR_CMD_READ_SRAM | (addr << 2), SAR_REG_CMD);
178 waitfor_idle(card);
179 value = readl(SAR_REG_DR0);
180 spin_unlock_irqrestore(&card->cmd_lock, flags);
181 return value;
182 }
183
184 static void
185 write_sram(struct idt77252_dev *card, unsigned long addr, u32 value)
186 {
187 unsigned long flags;
188
189 if ((idt77252_sram_write_errors == 0) &&
190 (((addr > card->tst[0] + card->tst_size - 2) &&
191 (addr < card->tst[0] + card->tst_size)) ||
192 ((addr > card->tst[1] + card->tst_size - 2) &&
193 (addr < card->tst[1] + card->tst_size)))) {
194 printk("%s: ERROR: TST JMP section at %08lx written: %08x\n",
195 card->name, addr, value);
196 }
197
198 spin_lock_irqsave(&card->cmd_lock, flags);
199 writel(value, SAR_REG_DR0);
200 writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD);
201 waitfor_idle(card);
202 spin_unlock_irqrestore(&card->cmd_lock, flags);
203 }
204
205 static u8
206 read_utility(void *dev, unsigned long ubus_addr)
207 {
208 struct idt77252_dev *card = dev;
209 unsigned long flags;
210 u8 value;
211
212 if (!card) {
213 printk("Error: No such device.\n");
214 return -1;
215 }
216
217 spin_lock_irqsave(&card->cmd_lock, flags);
218 writel(SAR_CMD_READ_UTILITY + ubus_addr, SAR_REG_CMD);
219 waitfor_idle(card);
220 value = readl(SAR_REG_DR0);
221 spin_unlock_irqrestore(&card->cmd_lock, flags);
222 return value;
223 }
224
225 static void
226 write_utility(void *dev, unsigned long ubus_addr, u8 value)
227 {
228 struct idt77252_dev *card = dev;
229 unsigned long flags;
230
231 if (!card) {
232 printk("Error: No such device.\n");
233 return;
234 }
235
236 spin_lock_irqsave(&card->cmd_lock, flags);
237 writel((u32) value, SAR_REG_DR0);
238 writel(SAR_CMD_WRITE_UTILITY + ubus_addr, SAR_REG_CMD);
239 waitfor_idle(card);
240 spin_unlock_irqrestore(&card->cmd_lock, flags);
241 }
242
243 #ifdef HAVE_EEPROM
244 static u32 rdsrtab[] =
245 {
246 SAR_GP_EECS | SAR_GP_EESCLK,
247 0,
248 SAR_GP_EESCLK, /* 0 */
249 0,
250 SAR_GP_EESCLK, /* 0 */
251 0,
252 SAR_GP_EESCLK, /* 0 */
253 0,
254 SAR_GP_EESCLK, /* 0 */
255 0,
256 SAR_GP_EESCLK, /* 0 */
257 SAR_GP_EEDO,
258 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
259 0,
260 SAR_GP_EESCLK, /* 0 */
261 SAR_GP_EEDO,
262 SAR_GP_EESCLK | SAR_GP_EEDO /* 1 */
263 };
264
265 static u32 wrentab[] =
266 {
267 SAR_GP_EECS | SAR_GP_EESCLK,
268 0,
269 SAR_GP_EESCLK, /* 0 */
270 0,
271 SAR_GP_EESCLK, /* 0 */
272 0,
273 SAR_GP_EESCLK, /* 0 */
274 0,
275 SAR_GP_EESCLK, /* 0 */
276 SAR_GP_EEDO,
277 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
278 SAR_GP_EEDO,
279 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
280 0,
281 SAR_GP_EESCLK, /* 0 */
282 0,
283 SAR_GP_EESCLK /* 0 */
284 };
285
286 static u32 rdtab[] =
287 {
288 SAR_GP_EECS | SAR_GP_EESCLK,
289 0,
290 SAR_GP_EESCLK, /* 0 */
291 0,
292 SAR_GP_EESCLK, /* 0 */
293 0,
294 SAR_GP_EESCLK, /* 0 */
295 0,
296 SAR_GP_EESCLK, /* 0 */
297 0,
298 SAR_GP_EESCLK, /* 0 */
299 0,
300 SAR_GP_EESCLK, /* 0 */
301 SAR_GP_EEDO,
302 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
303 SAR_GP_EEDO,
304 SAR_GP_EESCLK | SAR_GP_EEDO /* 1 */
305 };
306
307 static u32 wrtab[] =
308 {
309 SAR_GP_EECS | SAR_GP_EESCLK,
310 0,
311 SAR_GP_EESCLK, /* 0 */
312 0,
313 SAR_GP_EESCLK, /* 0 */
314 0,
315 SAR_GP_EESCLK, /* 0 */
316 0,
317 SAR_GP_EESCLK, /* 0 */
318 0,
319 SAR_GP_EESCLK, /* 0 */
320 0,
321 SAR_GP_EESCLK, /* 0 */
322 SAR_GP_EEDO,
323 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
324 0,
325 SAR_GP_EESCLK /* 0 */
326 };
327
328 static u32 clktab[] =
329 {
330 0,
331 SAR_GP_EESCLK,
332 0,
333 SAR_GP_EESCLK,
334 0,
335 SAR_GP_EESCLK,
336 0,
337 SAR_GP_EESCLK,
338 0,
339 SAR_GP_EESCLK,
340 0,
341 SAR_GP_EESCLK,
342 0,
343 SAR_GP_EESCLK,
344 0,
345 SAR_GP_EESCLK,
346 0
347 };
348
349 static u32
350 idt77252_read_gp(struct idt77252_dev *card)
351 {
352 u32 gp;
353
354 gp = readl(SAR_REG_GP);
355 #if 0
356 printk("RD: %s\n", gp & SAR_GP_EEDI ? "1" : "0");
357 #endif
358 return gp;
359 }
360
361 static void
362 idt77252_write_gp(struct idt77252_dev *card, u32 value)
363 {
364 unsigned long flags;
365
366 #if 0
367 printk("WR: %s %s %s\n", value & SAR_GP_EECS ? " " : "/CS",
368 value & SAR_GP_EESCLK ? "HIGH" : "LOW ",
369 value & SAR_GP_EEDO ? "1" : "0");
370 #endif
371
372 spin_lock_irqsave(&card->cmd_lock, flags);
373 waitfor_idle(card);
374 writel(value, SAR_REG_GP);
375 spin_unlock_irqrestore(&card->cmd_lock, flags);
376 }
377
378 static u8
379 idt77252_eeprom_read_status(struct idt77252_dev *card)
380 {
381 u8 byte;
382 u32 gp;
383 int i, j;
384
385 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
386
387 for (i = 0; i < ARRAY_SIZE(rdsrtab); i++) {
388 idt77252_write_gp(card, gp | rdsrtab[i]);
389 udelay(5);
390 }
391 idt77252_write_gp(card, gp | SAR_GP_EECS);
392 udelay(5);
393
394 byte = 0;
395 for (i = 0, j = 0; i < 8; i++) {
396 byte <<= 1;
397
398 idt77252_write_gp(card, gp | clktab[j++]);
399 udelay(5);
400
401 byte |= idt77252_read_gp(card) & SAR_GP_EEDI ? 1 : 0;
402
403 idt77252_write_gp(card, gp | clktab[j++]);
404 udelay(5);
405 }
406 idt77252_write_gp(card, gp | SAR_GP_EECS);
407 udelay(5);
408
409 return byte;
410 }
411
412 static u8
413 idt77252_eeprom_read_byte(struct idt77252_dev *card, u8 offset)
414 {
415 u8 byte;
416 u32 gp;
417 int i, j;
418
419 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
420
421 for (i = 0; i < ARRAY_SIZE(rdtab); i++) {
422 idt77252_write_gp(card, gp | rdtab[i]);
423 udelay(5);
424 }
425 idt77252_write_gp(card, gp | SAR_GP_EECS);
426 udelay(5);
427
428 for (i = 0, j = 0; i < 8; i++) {
429 idt77252_write_gp(card, gp | clktab[j++] |
430 (offset & 1 ? SAR_GP_EEDO : 0));
431 udelay(5);
432
433 idt77252_write_gp(card, gp | clktab[j++] |
434 (offset & 1 ? SAR_GP_EEDO : 0));
435 udelay(5);
436
437 offset >>= 1;
438 }
439 idt77252_write_gp(card, gp | SAR_GP_EECS);
440 udelay(5);
441
442 byte = 0;
443 for (i = 0, j = 0; i < 8; i++) {
444 byte <<= 1;
445
446 idt77252_write_gp(card, gp | clktab[j++]);
447 udelay(5);
448
449 byte |= idt77252_read_gp(card) & SAR_GP_EEDI ? 1 : 0;
450
451 idt77252_write_gp(card, gp | clktab[j++]);
452 udelay(5);
453 }
454 idt77252_write_gp(card, gp | SAR_GP_EECS);
455 udelay(5);
456
457 return byte;
458 }
459
460 static void
461 idt77252_eeprom_write_byte(struct idt77252_dev *card, u8 offset, u8 data)
462 {
463 u32 gp;
464 int i, j;
465
466 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
467
468 for (i = 0; i < ARRAY_SIZE(wrentab); i++) {
469 idt77252_write_gp(card, gp | wrentab[i]);
470 udelay(5);
471 }
472 idt77252_write_gp(card, gp | SAR_GP_EECS);
473 udelay(5);
474
475 for (i = 0; i < ARRAY_SIZE(wrtab); i++) {
476 idt77252_write_gp(card, gp | wrtab[i]);
477 udelay(5);
478 }
479 idt77252_write_gp(card, gp | SAR_GP_EECS);
480 udelay(5);
481
482 for (i = 0, j = 0; i < 8; i++) {
483 idt77252_write_gp(card, gp | clktab[j++] |
484 (offset & 1 ? SAR_GP_EEDO : 0));
485 udelay(5);
486
487 idt77252_write_gp(card, gp | clktab[j++] |
488 (offset & 1 ? SAR_GP_EEDO : 0));
489 udelay(5);
490
491 offset >>= 1;
492 }
493 idt77252_write_gp(card, gp | SAR_GP_EECS);
494 udelay(5);
495
496 for (i = 0, j = 0; i < 8; i++) {
497 idt77252_write_gp(card, gp | clktab[j++] |
498 (data & 1 ? SAR_GP_EEDO : 0));
499 udelay(5);
500
501 idt77252_write_gp(card, gp | clktab[j++] |
502 (data & 1 ? SAR_GP_EEDO : 0));
503 udelay(5);
504
505 data >>= 1;
506 }
507 idt77252_write_gp(card, gp | SAR_GP_EECS);
508 udelay(5);
509 }
510
511 static void
512 idt77252_eeprom_init(struct idt77252_dev *card)
513 {
514 u32 gp;
515
516 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
517
518 idt77252_write_gp(card, gp | SAR_GP_EECS | SAR_GP_EESCLK);
519 udelay(5);
520 idt77252_write_gp(card, gp | SAR_GP_EECS);
521 udelay(5);
522 idt77252_write_gp(card, gp | SAR_GP_EECS | SAR_GP_EESCLK);
523 udelay(5);
524 idt77252_write_gp(card, gp | SAR_GP_EECS);
525 udelay(5);
526 }
527 #endif /* HAVE_EEPROM */
528
529
530 #ifdef CONFIG_ATM_IDT77252_DEBUG
531 static void
532 dump_tct(struct idt77252_dev *card, int index)
533 {
534 unsigned long tct;
535 int i;
536
537 tct = (unsigned long) (card->tct_base + index * SAR_SRAM_TCT_SIZE);
538
539 printk("%s: TCT %x:", card->name, index);
540 for (i = 0; i < 8; i++) {
541 printk(" %08x", read_sram(card, tct + i));
542 }
543 printk("\n");
544 }
545
546 static void
547 idt77252_tx_dump(struct idt77252_dev *card)
548 {
549 struct atm_vcc *vcc;
550 struct vc_map *vc;
551 int i;
552
553 printk("%s\n", __func__);
554 for (i = 0; i < card->tct_size; i++) {
555 vc = card->vcs[i];
556 if (!vc)
557 continue;
558
559 vcc = NULL;
560 if (vc->rx_vcc)
561 vcc = vc->rx_vcc;
562 else if (vc->tx_vcc)
563 vcc = vc->tx_vcc;
564
565 if (!vcc)
566 continue;
567
568 printk("%s: Connection %d:\n", card->name, vc->index);
569 dump_tct(card, vc->index);
570 }
571 }
572 #endif
573
574
575 /*****************************************************************************/
576 /* */
577 /* SCQ Handling */
578 /* */
579 /*****************************************************************************/
580
581 static int
582 sb_pool_add(struct idt77252_dev *card, struct sk_buff *skb, int queue)
583 {
584 struct sb_pool *pool = &card->sbpool[queue];
585 int index;
586
587 index = pool->index;
588 while (pool->skb[index]) {
589 index = (index + 1) & FBQ_MASK;
590 if (index == pool->index)
591 return -ENOBUFS;
592 }
593
594 pool->skb[index] = skb;
595 IDT77252_PRV_POOL(skb) = POOL_HANDLE(queue, index);
596
597 pool->index = (index + 1) & FBQ_MASK;
598 return 0;
599 }
600
601 static void
602 sb_pool_remove(struct idt77252_dev *card, struct sk_buff *skb)
603 {
604 unsigned int queue, index;
605 u32 handle;
606
607 handle = IDT77252_PRV_POOL(skb);
608
609 queue = POOL_QUEUE(handle);
610 if (queue > 3)
611 return;
612
613 index = POOL_INDEX(handle);
614 if (index > FBQ_SIZE - 1)
615 return;
616
617 card->sbpool[queue].skb[index] = NULL;
618 }
619
620 static struct sk_buff *
621 sb_pool_skb(struct idt77252_dev *card, u32 handle)
622 {
623 unsigned int queue, index;
624
625 queue = POOL_QUEUE(handle);
626 if (queue > 3)
627 return NULL;
628
629 index = POOL_INDEX(handle);
630 if (index > FBQ_SIZE - 1)
631 return NULL;
632
633 return card->sbpool[queue].skb[index];
634 }
635
636 static struct scq_info *
637 alloc_scq(struct idt77252_dev *card, int class)
638 {
639 struct scq_info *scq;
640
641 scq = kzalloc(sizeof(struct scq_info), GFP_KERNEL);
642 if (!scq)
643 return NULL;
644 scq->base = dma_alloc_coherent(&card->pcidev->dev, SCQ_SIZE,
645 &scq->paddr, GFP_KERNEL);
646 if (scq->base == NULL) {
647 kfree(scq);
648 return NULL;
649 }
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 dma_free_coherent(&card->pcidev->dev, SCQ_SIZE,
674 scq->base, scq->paddr);
675
676 while ((skb = skb_dequeue(&scq->transmit))) {
677 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
678 skb->len, DMA_TO_DEVICE);
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 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
689 skb->len, DMA_TO_DEVICE);
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 (refcount_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 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
805 skb->len, DMA_TO_DEVICE);
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) = dma_map_single(&card->pcidev->dev, skb->data,
851 skb->len, DMA_TO_DEVICE);
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 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
929 skb->len, DMA_TO_DEVICE);
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 = dma_alloc_coherent(&card->pcidev->dev, RSQSIZE,
975 &card->rsq.paddr, GFP_KERNEL);
976 if (card->rsq.base == NULL) {
977 printk("%s: can't allocate RSQ.\n", card->name);
978 return -1;
979 }
980
981 card->rsq.last = card->rsq.base + RSQ_NUM_ENTRIES - 1;
982 card->rsq.next = card->rsq.last;
983 for (rsqe = card->rsq.base; rsqe <= card->rsq.last; rsqe++)
984 rsqe->word_4 = 0;
985
986 writel((unsigned long) card->rsq.last - (unsigned long) card->rsq.base,
987 SAR_REG_RSQH);
988 writel(card->rsq.paddr, SAR_REG_RSQB);
989
990 IPRINTK("%s: RSQ base at 0x%lx (0x%x).\n", card->name,
991 (unsigned long) card->rsq.base,
992 readl(SAR_REG_RSQB));
993 IPRINTK("%s: RSQ head = 0x%x, base = 0x%x, tail = 0x%x.\n",
994 card->name,
995 readl(SAR_REG_RSQH),
996 readl(SAR_REG_RSQB),
997 readl(SAR_REG_RSQT));
998
999 return 0;
1000 }
1001
1002 static void
1003 deinit_rsq(struct idt77252_dev *card)
1004 {
1005 dma_free_coherent(&card->pcidev->dev, RSQSIZE,
1006 card->rsq.base, card->rsq.paddr);
1007 }
1008
1009 static void
1010 dequeue_rx(struct idt77252_dev *card, struct rsq_entry *rsqe)
1011 {
1012 struct atm_vcc *vcc;
1013 struct sk_buff *skb;
1014 struct rx_pool *rpp;
1015 struct vc_map *vc;
1016 u32 header, vpi, vci;
1017 u32 stat;
1018 int i;
1019
1020 stat = le32_to_cpu(rsqe->word_4);
1021
1022 if (stat & SAR_RSQE_IDLE) {
1023 RXPRINTK("%s: message about inactive connection.\n",
1024 card->name);
1025 return;
1026 }
1027
1028 skb = sb_pool_skb(card, le32_to_cpu(rsqe->word_2));
1029 if (skb == NULL) {
1030 printk("%s: NULL skb in %s, rsqe: %08x %08x %08x %08x\n",
1031 card->name, __func__,
1032 le32_to_cpu(rsqe->word_1), le32_to_cpu(rsqe->word_2),
1033 le32_to_cpu(rsqe->word_3), le32_to_cpu(rsqe->word_4));
1034 return;
1035 }
1036
1037 header = le32_to_cpu(rsqe->word_1);
1038 vpi = (header >> 16) & 0x00ff;
1039 vci = (header >> 0) & 0xffff;
1040
1041 RXPRINTK("%s: SDU for %d.%d received in buffer 0x%p (data 0x%p).\n",
1042 card->name, vpi, vci, skb, skb->data);
1043
1044 if ((vpi >= (1 << card->vpibits)) || (vci != (vci & card->vcimask))) {
1045 printk("%s: SDU received for out-of-range vc %u.%u\n",
1046 card->name, vpi, vci);
1047 recycle_rx_skb(card, skb);
1048 return;
1049 }
1050
1051 vc = card->vcs[VPCI2VC(card, vpi, vci)];
1052 if (!vc || !test_bit(VCF_RX, &vc->flags)) {
1053 printk("%s: SDU received on non RX vc %u.%u\n",
1054 card->name, vpi, vci);
1055 recycle_rx_skb(card, skb);
1056 return;
1057 }
1058
1059 vcc = vc->rx_vcc;
1060
1061 dma_sync_single_for_cpu(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
1062 skb_end_pointer(skb) - skb->data,
1063 DMA_FROM_DEVICE);
1064
1065 if ((vcc->qos.aal == ATM_AAL0) ||
1066 (vcc->qos.aal == ATM_AAL34)) {
1067 struct sk_buff *sb;
1068 unsigned char *cell;
1069 u32 aal0;
1070
1071 cell = skb->data;
1072 for (i = (stat & SAR_RSQE_CELLCNT); i; i--) {
1073 if ((sb = dev_alloc_skb(64)) == NULL) {
1074 printk("%s: Can't allocate buffers for aal0.\n",
1075 card->name);
1076 atomic_add(i, &vcc->stats->rx_drop);
1077 break;
1078 }
1079 if (!atm_charge(vcc, sb->truesize)) {
1080 RXPRINTK("%s: atm_charge() dropped aal0 packets.\n",
1081 card->name);
1082 atomic_add(i - 1, &vcc->stats->rx_drop);
1083 dev_kfree_skb(sb);
1084 break;
1085 }
1086 aal0 = (vpi << ATM_HDR_VPI_SHIFT) |
1087 (vci << ATM_HDR_VCI_SHIFT);
1088 aal0 |= (stat & SAR_RSQE_EPDU) ? 0x00000002 : 0;
1089 aal0 |= (stat & SAR_RSQE_CLP) ? 0x00000001 : 0;
1090
1091 *((u32 *) sb->data) = aal0;
1092 skb_put(sb, sizeof(u32));
1093 skb_put_data(sb, cell, ATM_CELL_PAYLOAD);
1094
1095 ATM_SKB(sb)->vcc = vcc;
1096 __net_timestamp(sb);
1097 vcc->push(vcc, sb);
1098 atomic_inc(&vcc->stats->rx);
1099
1100 cell += ATM_CELL_PAYLOAD;
1101 }
1102
1103 recycle_rx_skb(card, skb);
1104 return;
1105 }
1106 if (vcc->qos.aal != ATM_AAL5) {
1107 printk("%s: Unexpected AAL type in dequeue_rx(): %d.\n",
1108 card->name, vcc->qos.aal);
1109 recycle_rx_skb(card, skb);
1110 return;
1111 }
1112 skb->len = (stat & SAR_RSQE_CELLCNT) * ATM_CELL_PAYLOAD;
1113
1114 rpp = &vc->rcv.rx_pool;
1115
1116 __skb_queue_tail(&rpp->queue, skb);
1117 rpp->len += skb->len;
1118
1119 if (stat & SAR_RSQE_EPDU) {
1120 unsigned char *l1l2;
1121 unsigned int len;
1122
1123 l1l2 = (unsigned char *) ((unsigned long) skb->data + skb->len - 6);
1124
1125 len = (l1l2[0] << 8) | l1l2[1];
1126 len = len ? len : 0x10000;
1127
1128 RXPRINTK("%s: PDU has %d bytes.\n", card->name, len);
1129
1130 if ((len + 8 > rpp->len) || (len + (47 + 8) < rpp->len)) {
1131 RXPRINTK("%s: AAL5 PDU size mismatch: %d != %d. "
1132 "(CDC: %08x)\n",
1133 card->name, len, rpp->len, readl(SAR_REG_CDC));
1134 recycle_rx_pool_skb(card, rpp);
1135 atomic_inc(&vcc->stats->rx_err);
1136 return;
1137 }
1138 if (stat & SAR_RSQE_CRC) {
1139 RXPRINTK("%s: AAL5 CRC error.\n", card->name);
1140 recycle_rx_pool_skb(card, rpp);
1141 atomic_inc(&vcc->stats->rx_err);
1142 return;
1143 }
1144 if (skb_queue_len(&rpp->queue) > 1) {
1145 struct sk_buff *sb;
1146
1147 skb = dev_alloc_skb(rpp->len);
1148 if (!skb) {
1149 RXPRINTK("%s: Can't alloc RX skb.\n",
1150 card->name);
1151 recycle_rx_pool_skb(card, rpp);
1152 atomic_inc(&vcc->stats->rx_err);
1153 return;
1154 }
1155 if (!atm_charge(vcc, skb->truesize)) {
1156 recycle_rx_pool_skb(card, rpp);
1157 dev_kfree_skb(skb);
1158 return;
1159 }
1160 skb_queue_walk(&rpp->queue, sb)
1161 skb_put_data(skb, sb->data, sb->len);
1162
1163 recycle_rx_pool_skb(card, rpp);
1164
1165 skb_trim(skb, len);
1166 ATM_SKB(skb)->vcc = vcc;
1167 __net_timestamp(skb);
1168
1169 vcc->push(vcc, skb);
1170 atomic_inc(&vcc->stats->rx);
1171
1172 return;
1173 }
1174
1175 flush_rx_pool(card, rpp);
1176
1177 if (!atm_charge(vcc, skb->truesize)) {
1178 recycle_rx_skb(card, skb);
1179 return;
1180 }
1181
1182 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
1183 skb_end_pointer(skb) - skb->data,
1184 DMA_FROM_DEVICE);
1185 sb_pool_remove(card, skb);
1186
1187 skb_trim(skb, len);
1188 ATM_SKB(skb)->vcc = vcc;
1189 __net_timestamp(skb);
1190
1191 vcc->push(vcc, skb);
1192 atomic_inc(&vcc->stats->rx);
1193
1194 if (skb->truesize > SAR_FB_SIZE_3)
1195 add_rx_skb(card, 3, SAR_FB_SIZE_3, 1);
1196 else if (skb->truesize > SAR_FB_SIZE_2)
1197 add_rx_skb(card, 2, SAR_FB_SIZE_2, 1);
1198 else if (skb->truesize > SAR_FB_SIZE_1)
1199 add_rx_skb(card, 1, SAR_FB_SIZE_1, 1);
1200 else
1201 add_rx_skb(card, 0, SAR_FB_SIZE_0, 1);
1202 return;
1203 }
1204 }
1205
1206 static void
1207 idt77252_rx(struct idt77252_dev *card)
1208 {
1209 struct rsq_entry *rsqe;
1210
1211 if (card->rsq.next == card->rsq.last)
1212 rsqe = card->rsq.base;
1213 else
1214 rsqe = card->rsq.next + 1;
1215
1216 if (!(le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID)) {
1217 RXPRINTK("%s: no entry in RSQ.\n", card->name);
1218 return;
1219 }
1220
1221 do {
1222 dequeue_rx(card, rsqe);
1223 rsqe->word_4 = 0;
1224 card->rsq.next = rsqe;
1225 if (card->rsq.next == card->rsq.last)
1226 rsqe = card->rsq.base;
1227 else
1228 rsqe = card->rsq.next + 1;
1229 } while (le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID);
1230
1231 writel((unsigned long) card->rsq.next - (unsigned long) card->rsq.base,
1232 SAR_REG_RSQH);
1233 }
1234
1235 static void
1236 idt77252_rx_raw(struct idt77252_dev *card)
1237 {
1238 struct sk_buff *queue;
1239 u32 head, tail;
1240 struct atm_vcc *vcc;
1241 struct vc_map *vc;
1242 struct sk_buff *sb;
1243
1244 if (card->raw_cell_head == NULL) {
1245 u32 handle = le32_to_cpu(*(card->raw_cell_hnd + 1));
1246 card->raw_cell_head = sb_pool_skb(card, handle);
1247 }
1248
1249 queue = card->raw_cell_head;
1250 if (!queue)
1251 return;
1252
1253 head = IDT77252_PRV_PADDR(queue) + (queue->data - queue->head - 16);
1254 tail = readl(SAR_REG_RAWCT);
1255
1256 dma_sync_single_for_cpu(&card->pcidev->dev, IDT77252_PRV_PADDR(queue),
1257 skb_end_offset(queue) - 16,
1258 DMA_FROM_DEVICE);
1259
1260 while (head != tail) {
1261 unsigned int vpi, vci;
1262 u32 header;
1263
1264 header = le32_to_cpu(*(u32 *) &queue->data[0]);
1265
1266 vpi = (header & ATM_HDR_VPI_MASK) >> ATM_HDR_VPI_SHIFT;
1267 vci = (header & ATM_HDR_VCI_MASK) >> ATM_HDR_VCI_SHIFT;
1268
1269 #ifdef CONFIG_ATM_IDT77252_DEBUG
1270 if (debug & DBG_RAW_CELL) {
1271 int i;
1272
1273 printk("%s: raw cell %x.%02x.%04x.%x.%x\n",
1274 card->name, (header >> 28) & 0x000f,
1275 (header >> 20) & 0x00ff,
1276 (header >> 4) & 0xffff,
1277 (header >> 1) & 0x0007,
1278 (header >> 0) & 0x0001);
1279 for (i = 16; i < 64; i++)
1280 printk(" %02x", queue->data[i]);
1281 printk("\n");
1282 }
1283 #endif
1284
1285 if (vpi >= (1<<card->vpibits) || vci >= (1<<card->vcibits)) {
1286 RPRINTK("%s: SDU received for out-of-range vc %u.%u\n",
1287 card->name, vpi, vci);
1288 goto drop;
1289 }
1290
1291 vc = card->vcs[VPCI2VC(card, vpi, vci)];
1292 if (!vc || !test_bit(VCF_RX, &vc->flags)) {
1293 RPRINTK("%s: SDU received on non RX vc %u.%u\n",
1294 card->name, vpi, vci);
1295 goto drop;
1296 }
1297
1298 vcc = vc->rx_vcc;
1299
1300 if (vcc->qos.aal != ATM_AAL0) {
1301 RPRINTK("%s: raw cell for non AAL0 vc %u.%u\n",
1302 card->name, vpi, vci);
1303 atomic_inc(&vcc->stats->rx_drop);
1304 goto drop;
1305 }
1306
1307 if ((sb = dev_alloc_skb(64)) == NULL) {
1308 printk("%s: Can't allocate buffers for AAL0.\n",
1309 card->name);
1310 atomic_inc(&vcc->stats->rx_err);
1311 goto drop;
1312 }
1313
1314 if (!atm_charge(vcc, sb->truesize)) {
1315 RXPRINTK("%s: atm_charge() dropped AAL0 packets.\n",
1316 card->name);
1317 dev_kfree_skb(sb);
1318 goto drop;
1319 }
1320
1321 *((u32 *) sb->data) = header;
1322 skb_put(sb, sizeof(u32));
1323 skb_put_data(sb, &(queue->data[16]), ATM_CELL_PAYLOAD);
1324
1325 ATM_SKB(sb)->vcc = vcc;
1326 __net_timestamp(sb);
1327 vcc->push(vcc, sb);
1328 atomic_inc(&vcc->stats->rx);
1329
1330 drop:
1331 skb_pull(queue, 64);
1332
1333 head = IDT77252_PRV_PADDR(queue)
1334 + (queue->data - queue->head - 16);
1335
1336 if (queue->len < 128) {
1337 struct sk_buff *next;
1338 u32 handle;
1339
1340 head = le32_to_cpu(*(u32 *) &queue->data[0]);
1341 handle = le32_to_cpu(*(u32 *) &queue->data[4]);
1342
1343 next = sb_pool_skb(card, handle);
1344 recycle_rx_skb(card, queue);
1345
1346 if (next) {
1347 card->raw_cell_head = next;
1348 queue = card->raw_cell_head;
1349 dma_sync_single_for_cpu(&card->pcidev->dev,
1350 IDT77252_PRV_PADDR(queue),
1351 (skb_end_pointer(queue) -
1352 queue->data),
1353 DMA_FROM_DEVICE);
1354 } else {
1355 card->raw_cell_head = NULL;
1356 printk("%s: raw cell queue overrun\n",
1357 card->name);
1358 break;
1359 }
1360 }
1361 }
1362 }
1363
1364
1365 /*****************************************************************************/
1366 /* */
1367 /* TSQ Handling */
1368 /* */
1369 /*****************************************************************************/
1370
1371 static int
1372 init_tsq(struct idt77252_dev *card)
1373 {
1374 struct tsq_entry *tsqe;
1375
1376 card->tsq.base = dma_alloc_coherent(&card->pcidev->dev, RSQSIZE,
1377 &card->tsq.paddr, GFP_KERNEL);
1378 if (card->tsq.base == NULL) {
1379 printk("%s: can't allocate TSQ.\n", card->name);
1380 return -1;
1381 }
1382
1383 card->tsq.last = card->tsq.base + TSQ_NUM_ENTRIES - 1;
1384 card->tsq.next = card->tsq.last;
1385 for (tsqe = card->tsq.base; tsqe <= card->tsq.last; tsqe++)
1386 tsqe->word_2 = cpu_to_le32(SAR_TSQE_INVALID);
1387
1388 writel(card->tsq.paddr, SAR_REG_TSQB);
1389 writel((unsigned long) card->tsq.next - (unsigned long) card->tsq.base,
1390 SAR_REG_TSQH);
1391
1392 return 0;
1393 }
1394
1395 static void
1396 deinit_tsq(struct idt77252_dev *card)
1397 {
1398 dma_free_coherent(&card->pcidev->dev, TSQSIZE,
1399 card->tsq.base, card->tsq.paddr);
1400 }
1401
1402 static void
1403 idt77252_tx(struct idt77252_dev *card)
1404 {
1405 struct tsq_entry *tsqe;
1406 unsigned int vpi, vci;
1407 struct vc_map *vc;
1408 u32 conn, stat;
1409
1410 if (card->tsq.next == card->tsq.last)
1411 tsqe = card->tsq.base;
1412 else
1413 tsqe = card->tsq.next + 1;
1414
1415 TXPRINTK("idt77252_tx: tsq %p: base %p, next %p, last %p\n", tsqe,
1416 card->tsq.base, card->tsq.next, card->tsq.last);
1417 TXPRINTK("idt77252_tx: tsqb %08x, tsqt %08x, tsqh %08x, \n",
1418 readl(SAR_REG_TSQB),
1419 readl(SAR_REG_TSQT),
1420 readl(SAR_REG_TSQH));
1421
1422 stat = le32_to_cpu(tsqe->word_2);
1423
1424 if (stat & SAR_TSQE_INVALID)
1425 return;
1426
1427 do {
1428 TXPRINTK("tsqe: 0x%p [0x%08x 0x%08x]\n", tsqe,
1429 le32_to_cpu(tsqe->word_1),
1430 le32_to_cpu(tsqe->word_2));
1431
1432 switch (stat & SAR_TSQE_TYPE) {
1433 case SAR_TSQE_TYPE_TIMER:
1434 TXPRINTK("%s: Timer RollOver detected.\n", card->name);
1435 break;
1436
1437 case SAR_TSQE_TYPE_IDLE:
1438
1439 conn = le32_to_cpu(tsqe->word_1);
1440
1441 if (SAR_TSQE_TAG(stat) == 0x10) {
1442 #ifdef NOTDEF
1443 printk("%s: Connection %d halted.\n",
1444 card->name,
1445 le32_to_cpu(tsqe->word_1) & 0x1fff);
1446 #endif
1447 break;
1448 }
1449
1450 vc = card->vcs[conn & 0x1fff];
1451 if (!vc) {
1452 printk("%s: could not find VC from conn %d\n",
1453 card->name, conn & 0x1fff);
1454 break;
1455 }
1456
1457 printk("%s: Connection %d IDLE.\n",
1458 card->name, vc->index);
1459
1460 set_bit(VCF_IDLE, &vc->flags);
1461 break;
1462
1463 case SAR_TSQE_TYPE_TSR:
1464
1465 conn = le32_to_cpu(tsqe->word_1);
1466
1467 vc = card->vcs[conn & 0x1fff];
1468 if (!vc) {
1469 printk("%s: no VC at index %d\n",
1470 card->name,
1471 le32_to_cpu(tsqe->word_1) & 0x1fff);
1472 break;
1473 }
1474
1475 drain_scq(card, vc);
1476 break;
1477
1478 case SAR_TSQE_TYPE_TBD_COMP:
1479
1480 conn = le32_to_cpu(tsqe->word_1);
1481
1482 vpi = (conn >> SAR_TBD_VPI_SHIFT) & 0x00ff;
1483 vci = (conn >> SAR_TBD_VCI_SHIFT) & 0xffff;
1484
1485 if (vpi >= (1 << card->vpibits) ||
1486 vci >= (1 << card->vcibits)) {
1487 printk("%s: TBD complete: "
1488 "out of range VPI.VCI %u.%u\n",
1489 card->name, vpi, vci);
1490 break;
1491 }
1492
1493 vc = card->vcs[VPCI2VC(card, vpi, vci)];
1494 if (!vc) {
1495 printk("%s: TBD complete: "
1496 "no VC at VPI.VCI %u.%u\n",
1497 card->name, vpi, vci);
1498 break;
1499 }
1500
1501 drain_scq(card, vc);
1502 break;
1503 }
1504
1505 tsqe->word_2 = cpu_to_le32(SAR_TSQE_INVALID);
1506
1507 card->tsq.next = tsqe;
1508 if (card->tsq.next == card->tsq.last)
1509 tsqe = card->tsq.base;
1510 else
1511 tsqe = card->tsq.next + 1;
1512
1513 TXPRINTK("tsqe: %p: base %p, next %p, last %p\n", tsqe,
1514 card->tsq.base, card->tsq.next, card->tsq.last);
1515
1516 stat = le32_to_cpu(tsqe->word_2);
1517
1518 } while (!(stat & SAR_TSQE_INVALID));
1519
1520 writel((unsigned long)card->tsq.next - (unsigned long)card->tsq.base,
1521 SAR_REG_TSQH);
1522
1523 XPRINTK("idt77252_tx-after writel%d: TSQ head = 0x%x, tail = 0x%x, next = 0x%p.\n",
1524 card->index, readl(SAR_REG_TSQH),
1525 readl(SAR_REG_TSQT), card->tsq.next);
1526 }
1527
1528
1529 static void
1530 tst_timer(struct timer_list *t)
1531 {
1532 struct idt77252_dev *card = from_timer(card, t, tst_timer);
1533 unsigned long base, idle, jump;
1534 unsigned long flags;
1535 u32 pc;
1536 int e;
1537
1538 spin_lock_irqsave(&card->tst_lock, flags);
1539
1540 base = card->tst[card->tst_index];
1541 idle = card->tst[card->tst_index ^ 1];
1542
1543 if (test_bit(TST_SWITCH_WAIT, &card->tst_state)) {
1544 jump = base + card->tst_size - 2;
1545
1546 pc = readl(SAR_REG_NOW) >> 2;
1547 if ((pc ^ idle) & ~(card->tst_size - 1)) {
1548 mod_timer(&card->tst_timer, jiffies + 1);
1549 goto out;
1550 }
1551
1552 clear_bit(TST_SWITCH_WAIT, &card->tst_state);
1553
1554 card->tst_index ^= 1;
1555 write_sram(card, jump, TSTE_OPC_JMP | (base << 2));
1556
1557 base = card->tst[card->tst_index];
1558 idle = card->tst[card->tst_index ^ 1];
1559
1560 for (e = 0; e < card->tst_size - 2; e++) {
1561 if (card->soft_tst[e].tste & TSTE_PUSH_IDLE) {
1562 write_sram(card, idle + e,
1563 card->soft_tst[e].tste & TSTE_MASK);
1564 card->soft_tst[e].tste &= ~(TSTE_PUSH_IDLE);
1565 }
1566 }
1567 }
1568
1569 if (test_and_clear_bit(TST_SWITCH_PENDING, &card->tst_state)) {
1570
1571 for (e = 0; e < card->tst_size - 2; e++) {
1572 if (card->soft_tst[e].tste & TSTE_PUSH_ACTIVE) {
1573 write_sram(card, idle + e,
1574 card->soft_tst[e].tste & TSTE_MASK);
1575 card->soft_tst[e].tste &= ~(TSTE_PUSH_ACTIVE);
1576 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1577 }
1578 }
1579
1580 jump = base + card->tst_size - 2;
1581
1582 write_sram(card, jump, TSTE_OPC_NULL);
1583 set_bit(TST_SWITCH_WAIT, &card->tst_state);
1584
1585 mod_timer(&card->tst_timer, jiffies + 1);
1586 }
1587
1588 out:
1589 spin_unlock_irqrestore(&card->tst_lock, flags);
1590 }
1591
1592 static int
1593 __fill_tst(struct idt77252_dev *card, struct vc_map *vc,
1594 int n, unsigned int opc)
1595 {
1596 unsigned long cl, avail;
1597 unsigned long idle;
1598 int e, r;
1599 u32 data;
1600
1601 avail = card->tst_size - 2;
1602 for (e = 0; e < avail; e++) {
1603 if (card->soft_tst[e].vc == NULL)
1604 break;
1605 }
1606 if (e >= avail) {
1607 printk("%s: No free TST entries found\n", card->name);
1608 return -1;
1609 }
1610
1611 NPRINTK("%s: conn %d: first TST entry at %d.\n",
1612 card->name, vc ? vc->index : -1, e);
1613
1614 r = n;
1615 cl = avail;
1616 data = opc & TSTE_OPC_MASK;
1617 if (vc && (opc != TSTE_OPC_NULL))
1618 data = opc | vc->index;
1619
1620 idle = card->tst[card->tst_index ^ 1];
1621
1622 /*
1623 * Fill Soft TST.
1624 */
1625 while (r > 0) {
1626 if ((cl >= avail) && (card->soft_tst[e].vc == NULL)) {
1627 if (vc)
1628 card->soft_tst[e].vc = vc;
1629 else
1630 card->soft_tst[e].vc = (void *)-1;
1631
1632 card->soft_tst[e].tste = data;
1633 if (timer_pending(&card->tst_timer))
1634 card->soft_tst[e].tste |= TSTE_PUSH_ACTIVE;
1635 else {
1636 write_sram(card, idle + e, data);
1637 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1638 }
1639
1640 cl -= card->tst_size;
1641 r--;
1642 }
1643
1644 if (++e == avail)
1645 e = 0;
1646 cl += n;
1647 }
1648
1649 return 0;
1650 }
1651
1652 static int
1653 fill_tst(struct idt77252_dev *card, struct vc_map *vc, int n, unsigned int opc)
1654 {
1655 unsigned long flags;
1656 int res;
1657
1658 spin_lock_irqsave(&card->tst_lock, flags);
1659
1660 res = __fill_tst(card, vc, n, opc);
1661
1662 set_bit(TST_SWITCH_PENDING, &card->tst_state);
1663 if (!timer_pending(&card->tst_timer))
1664 mod_timer(&card->tst_timer, jiffies + 1);
1665
1666 spin_unlock_irqrestore(&card->tst_lock, flags);
1667 return res;
1668 }
1669
1670 static int
1671 __clear_tst(struct idt77252_dev *card, struct vc_map *vc)
1672 {
1673 unsigned long idle;
1674 int e;
1675
1676 idle = card->tst[card->tst_index ^ 1];
1677
1678 for (e = 0; e < card->tst_size - 2; e++) {
1679 if (card->soft_tst[e].vc == vc) {
1680 card->soft_tst[e].vc = NULL;
1681
1682 card->soft_tst[e].tste = TSTE_OPC_VAR;
1683 if (timer_pending(&card->tst_timer))
1684 card->soft_tst[e].tste |= TSTE_PUSH_ACTIVE;
1685 else {
1686 write_sram(card, idle + e, TSTE_OPC_VAR);
1687 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1688 }
1689 }
1690 }
1691
1692 return 0;
1693 }
1694
1695 static int
1696 clear_tst(struct idt77252_dev *card, struct vc_map *vc)
1697 {
1698 unsigned long flags;
1699 int res;
1700
1701 spin_lock_irqsave(&card->tst_lock, flags);
1702
1703 res = __clear_tst(card, vc);
1704
1705 set_bit(TST_SWITCH_PENDING, &card->tst_state);
1706 if (!timer_pending(&card->tst_timer))
1707 mod_timer(&card->tst_timer, jiffies + 1);
1708
1709 spin_unlock_irqrestore(&card->tst_lock, flags);
1710 return res;
1711 }
1712
1713 static int
1714 change_tst(struct idt77252_dev *card, struct vc_map *vc,
1715 int n, unsigned int opc)
1716 {
1717 unsigned long flags;
1718 int res;
1719
1720 spin_lock_irqsave(&card->tst_lock, flags);
1721
1722 __clear_tst(card, vc);
1723 res = __fill_tst(card, vc, n, opc);
1724
1725 set_bit(TST_SWITCH_PENDING, &card->tst_state);
1726 if (!timer_pending(&card->tst_timer))
1727 mod_timer(&card->tst_timer, jiffies + 1);
1728
1729 spin_unlock_irqrestore(&card->tst_lock, flags);
1730 return res;
1731 }
1732
1733
1734 static int
1735 set_tct(struct idt77252_dev *card, struct vc_map *vc)
1736 {
1737 unsigned long tct;
1738
1739 tct = (unsigned long) (card->tct_base + vc->index * SAR_SRAM_TCT_SIZE);
1740
1741 switch (vc->class) {
1742 case SCHED_CBR:
1743 OPRINTK("%s: writing TCT at 0x%lx, SCD 0x%lx.\n",
1744 card->name, tct, vc->scq->scd);
1745
1746 write_sram(card, tct + 0, TCT_CBR | vc->scq->scd);
1747 write_sram(card, tct + 1, 0);
1748 write_sram(card, tct + 2, 0);
1749 write_sram(card, tct + 3, 0);
1750 write_sram(card, tct + 4, 0);
1751 write_sram(card, tct + 5, 0);
1752 write_sram(card, tct + 6, 0);
1753 write_sram(card, tct + 7, 0);
1754 break;
1755
1756 case SCHED_UBR:
1757 OPRINTK("%s: writing TCT at 0x%lx, SCD 0x%lx.\n",
1758 card->name, tct, vc->scq->scd);
1759
1760 write_sram(card, tct + 0, TCT_UBR | vc->scq->scd);
1761 write_sram(card, tct + 1, 0);
1762 write_sram(card, tct + 2, TCT_TSIF);
1763 write_sram(card, tct + 3, TCT_HALT | TCT_IDLE);
1764 write_sram(card, tct + 4, 0);
1765 write_sram(card, tct + 5, vc->init_er);
1766 write_sram(card, tct + 6, 0);
1767 write_sram(card, tct + 7, TCT_FLAG_UBR);
1768 break;
1769
1770 case SCHED_VBR:
1771 case SCHED_ABR:
1772 default:
1773 return -ENOSYS;
1774 }
1775
1776 return 0;
1777 }
1778
1779 /*****************************************************************************/
1780 /* */
1781 /* FBQ Handling */
1782 /* */
1783 /*****************************************************************************/
1784
1785 static __inline__ int
1786 idt77252_fbq_level(struct idt77252_dev *card, int queue)
1787 {
1788 return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) & 0x0f;
1789 }
1790
1791 static __inline__ int
1792 idt77252_fbq_full(struct idt77252_dev *card, int queue)
1793 {
1794 return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) == 0x0f;
1795 }
1796
1797 static int
1798 push_rx_skb(struct idt77252_dev *card, struct sk_buff *skb, int queue)
1799 {
1800 unsigned long flags;
1801 u32 handle;
1802 u32 addr;
1803
1804 skb->data = skb->head;
1805 skb_reset_tail_pointer(skb);
1806 skb->len = 0;
1807
1808 skb_reserve(skb, 16);
1809
1810 switch (queue) {
1811 case 0:
1812 skb_put(skb, SAR_FB_SIZE_0);
1813 break;
1814 case 1:
1815 skb_put(skb, SAR_FB_SIZE_1);
1816 break;
1817 case 2:
1818 skb_put(skb, SAR_FB_SIZE_2);
1819 break;
1820 case 3:
1821 skb_put(skb, SAR_FB_SIZE_3);
1822 break;
1823 default:
1824 return -1;
1825 }
1826
1827 if (idt77252_fbq_full(card, queue))
1828 return -1;
1829
1830 memset(&skb->data[(skb->len & ~(0x3f)) - 64], 0, 2 * sizeof(u32));
1831
1832 handle = IDT77252_PRV_POOL(skb);
1833 addr = IDT77252_PRV_PADDR(skb);
1834
1835 spin_lock_irqsave(&card->cmd_lock, flags);
1836 writel(handle, card->fbq[queue]);
1837 writel(addr, card->fbq[queue]);
1838 spin_unlock_irqrestore(&card->cmd_lock, flags);
1839
1840 return 0;
1841 }
1842
1843 static void
1844 add_rx_skb(struct idt77252_dev *card, int queue,
1845 unsigned int size, unsigned int count)
1846 {
1847 struct sk_buff *skb;
1848 dma_addr_t paddr;
1849 u32 handle;
1850
1851 while (count--) {
1852 skb = dev_alloc_skb(size);
1853 if (!skb)
1854 return;
1855
1856 if (sb_pool_add(card, skb, queue)) {
1857 printk("%s: SB POOL full\n", __func__);
1858 goto outfree;
1859 }
1860
1861 paddr = dma_map_single(&card->pcidev->dev, skb->data,
1862 skb_end_pointer(skb) - skb->data,
1863 DMA_FROM_DEVICE);
1864 IDT77252_PRV_PADDR(skb) = paddr;
1865
1866 if (push_rx_skb(card, skb, queue)) {
1867 printk("%s: FB QUEUE full\n", __func__);
1868 goto outunmap;
1869 }
1870 }
1871
1872 return;
1873
1874 outunmap:
1875 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
1876 skb_end_pointer(skb) - skb->data, DMA_FROM_DEVICE);
1877
1878 handle = IDT77252_PRV_POOL(skb);
1879 card->sbpool[POOL_QUEUE(handle)].skb[POOL_INDEX(handle)] = NULL;
1880
1881 outfree:
1882 dev_kfree_skb(skb);
1883 }
1884
1885
1886 static void
1887 recycle_rx_skb(struct idt77252_dev *card, struct sk_buff *skb)
1888 {
1889 u32 handle = IDT77252_PRV_POOL(skb);
1890 int err;
1891
1892 dma_sync_single_for_device(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
1893 skb_end_pointer(skb) - skb->data,
1894 DMA_FROM_DEVICE);
1895
1896 err = push_rx_skb(card, skb, POOL_QUEUE(handle));
1897 if (err) {
1898 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
1899 skb_end_pointer(skb) - skb->data,
1900 DMA_FROM_DEVICE);
1901 sb_pool_remove(card, skb);
1902 dev_kfree_skb(skb);
1903 }
1904 }
1905
1906 static void
1907 flush_rx_pool(struct idt77252_dev *card, struct rx_pool *rpp)
1908 {
1909 skb_queue_head_init(&rpp->queue);
1910 rpp->len = 0;
1911 }
1912
1913 static void
1914 recycle_rx_pool_skb(struct idt77252_dev *card, struct rx_pool *rpp)
1915 {
1916 struct sk_buff *skb, *tmp;
1917
1918 skb_queue_walk_safe(&rpp->queue, skb, tmp)
1919 recycle_rx_skb(card, skb);
1920
1921 flush_rx_pool(card, rpp);
1922 }
1923
1924 /*****************************************************************************/
1925 /* */
1926 /* ATM Interface */
1927 /* */
1928 /*****************************************************************************/
1929
1930 static void
1931 idt77252_phy_put(struct atm_dev *dev, unsigned char value, unsigned long addr)
1932 {
1933 write_utility(dev->dev_data, 0x100 + (addr & 0x1ff), value);
1934 }
1935
1936 static unsigned char
1937 idt77252_phy_get(struct atm_dev *dev, unsigned long addr)
1938 {
1939 return read_utility(dev->dev_data, 0x100 + (addr & 0x1ff));
1940 }
1941
1942 static inline int
1943 idt77252_send_skb(struct atm_vcc *vcc, struct sk_buff *skb, int oam)
1944 {
1945 struct atm_dev *dev = vcc->dev;
1946 struct idt77252_dev *card = dev->dev_data;
1947 struct vc_map *vc = vcc->dev_data;
1948 int err;
1949
1950 if (vc == NULL) {
1951 printk("%s: NULL connection in send().\n", card->name);
1952 atomic_inc(&vcc->stats->tx_err);
1953 dev_kfree_skb(skb);
1954 return -EINVAL;
1955 }
1956 if (!test_bit(VCF_TX, &vc->flags)) {
1957 printk("%s: Trying to transmit on a non-tx VC.\n", card->name);
1958 atomic_inc(&vcc->stats->tx_err);
1959 dev_kfree_skb(skb);
1960 return -EINVAL;
1961 }
1962
1963 switch (vcc->qos.aal) {
1964 case ATM_AAL0:
1965 case ATM_AAL1:
1966 case ATM_AAL5:
1967 break;
1968 default:
1969 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal);
1970 atomic_inc(&vcc->stats->tx_err);
1971 dev_kfree_skb(skb);
1972 return -EINVAL;
1973 }
1974
1975 if (skb_shinfo(skb)->nr_frags != 0) {
1976 printk("%s: No scatter-gather yet.\n", card->name);
1977 atomic_inc(&vcc->stats->tx_err);
1978 dev_kfree_skb(skb);
1979 return -EINVAL;
1980 }
1981 ATM_SKB(skb)->vcc = vcc;
1982
1983 err = queue_skb(card, vc, skb, oam);
1984 if (err) {
1985 atomic_inc(&vcc->stats->tx_err);
1986 dev_kfree_skb(skb);
1987 return err;
1988 }
1989
1990 return 0;
1991 }
1992
1993 static int idt77252_send(struct atm_vcc *vcc, struct sk_buff *skb)
1994 {
1995 return idt77252_send_skb(vcc, skb, 0);
1996 }
1997
1998 static int
1999 idt77252_send_oam(struct atm_vcc *vcc, void *cell, int flags)
2000 {
2001 struct atm_dev *dev = vcc->dev;
2002 struct idt77252_dev *card = dev->dev_data;
2003 struct sk_buff *skb;
2004
2005 skb = dev_alloc_skb(64);
2006 if (!skb) {
2007 printk("%s: Out of memory in send_oam().\n", card->name);
2008 atomic_inc(&vcc->stats->tx_err);
2009 return -ENOMEM;
2010 }
2011 refcount_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
2012
2013 skb_put_data(skb, cell, 52);
2014
2015 return idt77252_send_skb(vcc, skb, 1);
2016 }
2017
2018 static __inline__ unsigned int
2019 idt77252_fls(unsigned int x)
2020 {
2021 int r = 1;
2022
2023 if (x == 0)
2024 return 0;
2025 if (x & 0xffff0000) {
2026 x >>= 16;
2027 r += 16;
2028 }
2029 if (x & 0xff00) {
2030 x >>= 8;
2031 r += 8;
2032 }
2033 if (x & 0xf0) {
2034 x >>= 4;
2035 r += 4;
2036 }
2037 if (x & 0xc) {
2038 x >>= 2;
2039 r += 2;
2040 }
2041 if (x & 0x2)
2042 r += 1;
2043 return r;
2044 }
2045
2046 static u16
2047 idt77252_int_to_atmfp(unsigned int rate)
2048 {
2049 u16 m, e;
2050
2051 if (rate == 0)
2052 return 0;
2053 e = idt77252_fls(rate) - 1;
2054 if (e < 9)
2055 m = (rate - (1 << e)) << (9 - e);
2056 else if (e == 9)
2057 m = (rate - (1 << e));
2058 else /* e > 9 */
2059 m = (rate - (1 << e)) >> (e - 9);
2060 return 0x4000 | (e << 9) | m;
2061 }
2062
2063 static u8
2064 idt77252_rate_logindex(struct idt77252_dev *card, int pcr)
2065 {
2066 u16 afp;
2067
2068 afp = idt77252_int_to_atmfp(pcr < 0 ? -pcr : pcr);
2069 if (pcr < 0)
2070 return rate_to_log[(afp >> 5) & 0x1ff];
2071 return rate_to_log[((afp >> 5) + 1) & 0x1ff];
2072 }
2073
2074 static void
2075 idt77252_est_timer(struct timer_list *t)
2076 {
2077 struct rate_estimator *est = from_timer(est, t, timer);
2078 struct vc_map *vc = est->vc;
2079 struct idt77252_dev *card = vc->card;
2080 unsigned long flags;
2081 u32 rate, cps;
2082 u64 ncells;
2083 u8 lacr;
2084
2085 spin_lock_irqsave(&vc->lock, flags);
2086 if (!vc->estimator)
2087 goto out;
2088 ncells = est->cells;
2089
2090 rate = ((u32)(ncells - est->last_cells)) << (7 - est->interval);
2091 est->last_cells = ncells;
2092 est->avcps += ((long)rate - (long)est->avcps) >> est->ewma_log;
2093 est->cps = (est->avcps + 0x1f) >> 5;
2094
2095 cps = est->cps;
2096 if (cps < (est->maxcps >> 4))
2097 cps = est->maxcps >> 4;
2098
2099 lacr = idt77252_rate_logindex(card, cps);
2100 if (lacr > vc->max_er)
2101 lacr = vc->max_er;
2102
2103 if (lacr != vc->lacr) {
2104 vc->lacr = lacr;
2105 writel(TCMDQ_LACR|(vc->lacr << 16)|vc->index, SAR_REG_TCMDQ);
2106 }
2107
2108 est->timer.expires = jiffies + ((HZ / 4) << est->interval);
2109 add_timer(&est->timer);
2110
2111 out:
2112 spin_unlock_irqrestore(&vc->lock, flags);
2113 }
2114
2115 static struct rate_estimator *
2116 idt77252_init_est(struct vc_map *vc, int pcr)
2117 {
2118 struct rate_estimator *est;
2119
2120 est = kzalloc(sizeof(struct rate_estimator), GFP_KERNEL);
2121 if (!est)
2122 return NULL;
2123 est->maxcps = pcr < 0 ? -pcr : pcr;
2124 est->cps = est->maxcps;
2125 est->avcps = est->cps << 5;
2126 est->vc = vc;
2127
2128 est->interval = 2; /* XXX: make this configurable */
2129 est->ewma_log = 2; /* XXX: make this configurable */
2130 timer_setup(&est->timer, idt77252_est_timer, 0);
2131 mod_timer(&est->timer, jiffies + ((HZ / 4) << est->interval));
2132
2133 return est;
2134 }
2135
2136 static int
2137 idt77252_init_cbr(struct idt77252_dev *card, struct vc_map *vc,
2138 struct atm_vcc *vcc, struct atm_qos *qos)
2139 {
2140 int tst_free, tst_used, tst_entries;
2141 unsigned long tmpl, modl;
2142 int tcr, tcra;
2143
2144 if ((qos->txtp.max_pcr == 0) &&
2145 (qos->txtp.pcr == 0) && (qos->txtp.min_pcr == 0)) {
2146 printk("%s: trying to open a CBR VC with cell rate = 0\n",
2147 card->name);
2148 return -EINVAL;
2149 }
2150
2151 tst_used = 0;
2152 tst_free = card->tst_free;
2153 if (test_bit(VCF_TX, &vc->flags))
2154 tst_used = vc->ntste;
2155 tst_free += tst_used;
2156
2157 tcr = atm_pcr_goal(&qos->txtp);
2158 tcra = tcr >= 0 ? tcr : -tcr;
2159
2160 TXPRINTK("%s: CBR target cell rate = %d\n", card->name, tcra);
2161
2162 tmpl = (unsigned long) tcra * ((unsigned long) card->tst_size - 2);
2163 modl = tmpl % (unsigned long)card->utopia_pcr;
2164
2165 tst_entries = (int) (tmpl / card->utopia_pcr);
2166 if (tcr > 0) {
2167 if (modl > 0)
2168 tst_entries++;
2169 } else if (tcr == 0) {
2170 tst_entries = tst_free - SAR_TST_RESERVED;
2171 if (tst_entries <= 0) {
2172 printk("%s: no CBR bandwidth free.\n", card->name);
2173 return -ENOSR;
2174 }
2175 }
2176
2177 if (tst_entries == 0) {
2178 printk("%s: selected CBR bandwidth < granularity.\n",
2179 card->name);
2180 return -EINVAL;
2181 }
2182
2183 if (tst_entries > (tst_free - SAR_TST_RESERVED)) {
2184 printk("%s: not enough CBR bandwidth free.\n", card->name);
2185 return -ENOSR;
2186 }
2187
2188 vc->ntste = tst_entries;
2189
2190 card->tst_free = tst_free - tst_entries;
2191 if (test_bit(VCF_TX, &vc->flags)) {
2192 if (tst_used == tst_entries)
2193 return 0;
2194
2195 OPRINTK("%s: modify %d -> %d entries in TST.\n",
2196 card->name, tst_used, tst_entries);
2197 change_tst(card, vc, tst_entries, TSTE_OPC_CBR);
2198 return 0;
2199 }
2200
2201 OPRINTK("%s: setting %d entries in TST.\n", card->name, tst_entries);
2202 fill_tst(card, vc, tst_entries, TSTE_OPC_CBR);
2203 return 0;
2204 }
2205
2206 static int
2207 idt77252_init_ubr(struct idt77252_dev *card, struct vc_map *vc,
2208 struct atm_vcc *vcc, struct atm_qos *qos)
2209 {
2210 struct rate_estimator *est = NULL;
2211 unsigned long flags;
2212 int tcr;
2213
2214 spin_lock_irqsave(&vc->lock, flags);
2215 if (vc->estimator) {
2216 est = vc->estimator;
2217 vc->estimator = NULL;
2218 }
2219 spin_unlock_irqrestore(&vc->lock, flags);
2220 if (est) {
2221 del_timer_sync(&est->timer);
2222 kfree(est);
2223 }
2224
2225 tcr = atm_pcr_goal(&qos->txtp);
2226 if (tcr == 0)
2227 tcr = card->link_pcr;
2228
2229 vc->estimator = idt77252_init_est(vc, tcr);
2230
2231 vc->class = SCHED_UBR;
2232 vc->init_er = idt77252_rate_logindex(card, tcr);
2233 vc->lacr = vc->init_er;
2234 if (tcr < 0)
2235 vc->max_er = vc->init_er;
2236 else
2237 vc->max_er = 0xff;
2238
2239 return 0;
2240 }
2241
2242 static int
2243 idt77252_init_tx(struct idt77252_dev *card, struct vc_map *vc,
2244 struct atm_vcc *vcc, struct atm_qos *qos)
2245 {
2246 int error;
2247
2248 if (test_bit(VCF_TX, &vc->flags))
2249 return -EBUSY;
2250
2251 switch (qos->txtp.traffic_class) {
2252 case ATM_CBR:
2253 vc->class = SCHED_CBR;
2254 break;
2255
2256 case ATM_UBR:
2257 vc->class = SCHED_UBR;
2258 break;
2259
2260 case ATM_VBR:
2261 case ATM_ABR:
2262 default:
2263 return -EPROTONOSUPPORT;
2264 }
2265
2266 vc->scq = alloc_scq(card, vc->class);
2267 if (!vc->scq) {
2268 printk("%s: can't get SCQ.\n", card->name);
2269 return -ENOMEM;
2270 }
2271
2272 vc->scq->scd = get_free_scd(card, vc);
2273 if (vc->scq->scd == 0) {
2274 printk("%s: no SCD available.\n", card->name);
2275 free_scq(card, vc->scq);
2276 return -ENOMEM;
2277 }
2278
2279 fill_scd(card, vc->scq, vc->class);
2280
2281 if (set_tct(card, vc)) {
2282 printk("%s: class %d not supported.\n",
2283 card->name, qos->txtp.traffic_class);
2284
2285 card->scd2vc[vc->scd_index] = NULL;
2286 free_scq(card, vc->scq);
2287 return -EPROTONOSUPPORT;
2288 }
2289
2290 switch (vc->class) {
2291 case SCHED_CBR:
2292 error = idt77252_init_cbr(card, vc, vcc, qos);
2293 if (error) {
2294 card->scd2vc[vc->scd_index] = NULL;
2295 free_scq(card, vc->scq);
2296 return error;
2297 }
2298
2299 clear_bit(VCF_IDLE, &vc->flags);
2300 writel(TCMDQ_START | vc->index, SAR_REG_TCMDQ);
2301 break;
2302
2303 case SCHED_UBR:
2304 error = idt77252_init_ubr(card, vc, vcc, qos);
2305 if (error) {
2306 card->scd2vc[vc->scd_index] = NULL;
2307 free_scq(card, vc->scq);
2308 return error;
2309 }
2310
2311 set_bit(VCF_IDLE, &vc->flags);
2312 break;
2313 }
2314
2315 vc->tx_vcc = vcc;
2316 set_bit(VCF_TX, &vc->flags);
2317 return 0;
2318 }
2319
2320 static int
2321 idt77252_init_rx(struct idt77252_dev *card, struct vc_map *vc,
2322 struct atm_vcc *vcc, struct atm_qos *qos)
2323 {
2324 unsigned long flags;
2325 unsigned long addr;
2326 u32 rcte = 0;
2327
2328 if (test_bit(VCF_RX, &vc->flags))
2329 return -EBUSY;
2330
2331 vc->rx_vcc = vcc;
2332 set_bit(VCF_RX, &vc->flags);
2333
2334 if ((vcc->vci == 3) || (vcc->vci == 4))
2335 return 0;
2336
2337 flush_rx_pool(card, &vc->rcv.rx_pool);
2338
2339 rcte |= SAR_RCTE_CONNECTOPEN;
2340 rcte |= SAR_RCTE_RAWCELLINTEN;
2341
2342 switch (qos->aal) {
2343 case ATM_AAL0:
2344 rcte |= SAR_RCTE_RCQ;
2345 break;
2346 case ATM_AAL1:
2347 rcte |= SAR_RCTE_OAM; /* Let SAR drop Video */
2348 break;
2349 case ATM_AAL34:
2350 rcte |= SAR_RCTE_AAL34;
2351 break;
2352 case ATM_AAL5:
2353 rcte |= SAR_RCTE_AAL5;
2354 break;
2355 default:
2356 rcte |= SAR_RCTE_RCQ;
2357 break;
2358 }
2359
2360 if (qos->aal != ATM_AAL5)
2361 rcte |= SAR_RCTE_FBP_1;
2362 else if (qos->rxtp.max_sdu > SAR_FB_SIZE_2)
2363 rcte |= SAR_RCTE_FBP_3;
2364 else if (qos->rxtp.max_sdu > SAR_FB_SIZE_1)
2365 rcte |= SAR_RCTE_FBP_2;
2366 else if (qos->rxtp.max_sdu > SAR_FB_SIZE_0)
2367 rcte |= SAR_RCTE_FBP_1;
2368 else
2369 rcte |= SAR_RCTE_FBP_01;
2370
2371 addr = card->rct_base + (vc->index << 2);
2372
2373 OPRINTK("%s: writing RCT at 0x%lx\n", card->name, addr);
2374 write_sram(card, addr, rcte);
2375
2376 spin_lock_irqsave(&card->cmd_lock, flags);
2377 writel(SAR_CMD_OPEN_CONNECTION | (addr << 2), SAR_REG_CMD);
2378 waitfor_idle(card);
2379 spin_unlock_irqrestore(&card->cmd_lock, flags);
2380
2381 return 0;
2382 }
2383
2384 static int
2385 idt77252_open(struct atm_vcc *vcc)
2386 {
2387 struct atm_dev *dev = vcc->dev;
2388 struct idt77252_dev *card = dev->dev_data;
2389 struct vc_map *vc;
2390 unsigned int index;
2391 unsigned int inuse;
2392 int error;
2393 int vci = vcc->vci;
2394 short vpi = vcc->vpi;
2395
2396 if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC)
2397 return 0;
2398
2399 if (vpi >= (1 << card->vpibits)) {
2400 printk("%s: unsupported VPI: %d\n", card->name, vpi);
2401 return -EINVAL;
2402 }
2403
2404 if (vci >= (1 << card->vcibits)) {
2405 printk("%s: unsupported VCI: %d\n", card->name, vci);
2406 return -EINVAL;
2407 }
2408
2409 set_bit(ATM_VF_ADDR, &vcc->flags);
2410
2411 mutex_lock(&card->mutex);
2412
2413 OPRINTK("%s: opening vpi.vci: %d.%d\n", card->name, vpi, vci);
2414
2415 switch (vcc->qos.aal) {
2416 case ATM_AAL0:
2417 case ATM_AAL1:
2418 case ATM_AAL5:
2419 break;
2420 default:
2421 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal);
2422 mutex_unlock(&card->mutex);
2423 return -EPROTONOSUPPORT;
2424 }
2425
2426 index = VPCI2VC(card, vpi, vci);
2427 if (!card->vcs[index]) {
2428 card->vcs[index] = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2429 if (!card->vcs[index]) {
2430 printk("%s: can't alloc vc in open()\n", card->name);
2431 mutex_unlock(&card->mutex);
2432 return -ENOMEM;
2433 }
2434 card->vcs[index]->card = card;
2435 card->vcs[index]->index = index;
2436
2437 spin_lock_init(&card->vcs[index]->lock);
2438 }
2439 vc = card->vcs[index];
2440
2441 vcc->dev_data = vc;
2442
2443 IPRINTK("%s: idt77252_open: vc = %d (%d.%d) %s/%s (max RX SDU: %u)\n",
2444 card->name, vc->index, vcc->vpi, vcc->vci,
2445 vcc->qos.rxtp.traffic_class != ATM_NONE ? "rx" : "--",
2446 vcc->qos.txtp.traffic_class != ATM_NONE ? "tx" : "--",
2447 vcc->qos.rxtp.max_sdu);
2448
2449 inuse = 0;
2450 if (vcc->qos.txtp.traffic_class != ATM_NONE &&
2451 test_bit(VCF_TX, &vc->flags))
2452 inuse = 1;
2453 if (vcc->qos.rxtp.traffic_class != ATM_NONE &&
2454 test_bit(VCF_RX, &vc->flags))
2455 inuse += 2;
2456
2457 if (inuse) {
2458 printk("%s: %s vci already in use.\n", card->name,
2459 inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx");
2460 mutex_unlock(&card->mutex);
2461 return -EADDRINUSE;
2462 }
2463
2464 if (vcc->qos.txtp.traffic_class != ATM_NONE) {
2465 error = idt77252_init_tx(card, vc, vcc, &vcc->qos);
2466 if (error) {
2467 mutex_unlock(&card->mutex);
2468 return error;
2469 }
2470 }
2471
2472 if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
2473 error = idt77252_init_rx(card, vc, vcc, &vcc->qos);
2474 if (error) {
2475 mutex_unlock(&card->mutex);
2476 return error;
2477 }
2478 }
2479
2480 set_bit(ATM_VF_READY, &vcc->flags);
2481
2482 mutex_unlock(&card->mutex);
2483 return 0;
2484 }
2485
2486 static void
2487 idt77252_close(struct atm_vcc *vcc)
2488 {
2489 struct atm_dev *dev = vcc->dev;
2490 struct idt77252_dev *card = dev->dev_data;
2491 struct vc_map *vc = vcc->dev_data;
2492 unsigned long flags;
2493 unsigned long addr;
2494 unsigned long timeout;
2495
2496 mutex_lock(&card->mutex);
2497
2498 IPRINTK("%s: idt77252_close: vc = %d (%d.%d)\n",
2499 card->name, vc->index, vcc->vpi, vcc->vci);
2500
2501 clear_bit(ATM_VF_READY, &vcc->flags);
2502
2503 if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
2504
2505 spin_lock_irqsave(&vc->lock, flags);
2506 clear_bit(VCF_RX, &vc->flags);
2507 vc->rx_vcc = NULL;
2508 spin_unlock_irqrestore(&vc->lock, flags);
2509
2510 if ((vcc->vci == 3) || (vcc->vci == 4))
2511 goto done;
2512
2513 addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE;
2514
2515 spin_lock_irqsave(&card->cmd_lock, flags);
2516 writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2), SAR_REG_CMD);
2517 waitfor_idle(card);
2518 spin_unlock_irqrestore(&card->cmd_lock, flags);
2519
2520 if (skb_queue_len(&vc->rcv.rx_pool.queue) != 0) {
2521 DPRINTK("%s: closing a VC with pending rx buffers.\n",
2522 card->name);
2523
2524 recycle_rx_pool_skb(card, &vc->rcv.rx_pool);
2525 }
2526 }
2527
2528 done:
2529 if (vcc->qos.txtp.traffic_class != ATM_NONE) {
2530
2531 spin_lock_irqsave(&vc->lock, flags);
2532 clear_bit(VCF_TX, &vc->flags);
2533 clear_bit(VCF_IDLE, &vc->flags);
2534 clear_bit(VCF_RSV, &vc->flags);
2535 vc->tx_vcc = NULL;
2536
2537 if (vc->estimator) {
2538 del_timer(&vc->estimator->timer);
2539 kfree(vc->estimator);
2540 vc->estimator = NULL;
2541 }
2542 spin_unlock_irqrestore(&vc->lock, flags);
2543
2544 timeout = 5 * 1000;
2545 while (atomic_read(&vc->scq->used) > 0) {
2546 timeout = msleep_interruptible(timeout);
2547 if (!timeout) {
2548 pr_warn("%s: SCQ drain timeout: %u used\n",
2549 card->name, atomic_read(&vc->scq->used));
2550 break;
2551 }
2552 }
2553
2554 writel(TCMDQ_HALT | vc->index, SAR_REG_TCMDQ);
2555 clear_scd(card, vc->scq, vc->class);
2556
2557 if (vc->class == SCHED_CBR) {
2558 clear_tst(card, vc);
2559 card->tst_free += vc->ntste;
2560 vc->ntste = 0;
2561 }
2562
2563 card->scd2vc[vc->scd_index] = NULL;
2564 free_scq(card, vc->scq);
2565 }
2566
2567 mutex_unlock(&card->mutex);
2568 }
2569
2570 static int
2571 idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos, int flags)
2572 {
2573 struct atm_dev *dev = vcc->dev;
2574 struct idt77252_dev *card = dev->dev_data;
2575 struct vc_map *vc = vcc->dev_data;
2576 int error = 0;
2577
2578 mutex_lock(&card->mutex);
2579
2580 if (qos->txtp.traffic_class != ATM_NONE) {
2581 if (!test_bit(VCF_TX, &vc->flags)) {
2582 error = idt77252_init_tx(card, vc, vcc, qos);
2583 if (error)
2584 goto out;
2585 } else {
2586 switch (qos->txtp.traffic_class) {
2587 case ATM_CBR:
2588 error = idt77252_init_cbr(card, vc, vcc, qos);
2589 if (error)
2590 goto out;
2591 break;
2592
2593 case ATM_UBR:
2594 error = idt77252_init_ubr(card, vc, vcc, qos);
2595 if (error)
2596 goto out;
2597
2598 if (!test_bit(VCF_IDLE, &vc->flags)) {
2599 writel(TCMDQ_LACR | (vc->lacr << 16) |
2600 vc->index, SAR_REG_TCMDQ);
2601 }
2602 break;
2603
2604 case ATM_VBR:
2605 case ATM_ABR:
2606 error = -EOPNOTSUPP;
2607 goto out;
2608 }
2609 }
2610 }
2611
2612 if ((qos->rxtp.traffic_class != ATM_NONE) &&
2613 !test_bit(VCF_RX, &vc->flags)) {
2614 error = idt77252_init_rx(card, vc, vcc, qos);
2615 if (error)
2616 goto out;
2617 }
2618
2619 memcpy(&vcc->qos, qos, sizeof(struct atm_qos));
2620
2621 set_bit(ATM_VF_HASQOS, &vcc->flags);
2622
2623 out:
2624 mutex_unlock(&card->mutex);
2625 return error;
2626 }
2627
2628 static int
2629 idt77252_proc_read(struct atm_dev *dev, loff_t * pos, char *page)
2630 {
2631 struct idt77252_dev *card = dev->dev_data;
2632 int i, left;
2633
2634 left = (int) *pos;
2635 if (!left--)
2636 return sprintf(page, "IDT77252 Interrupts:\n");
2637 if (!left--)
2638 return sprintf(page, "TSIF: %lu\n", card->irqstat[15]);
2639 if (!left--)
2640 return sprintf(page, "TXICP: %lu\n", card->irqstat[14]);
2641 if (!left--)
2642 return sprintf(page, "TSQF: %lu\n", card->irqstat[12]);
2643 if (!left--)
2644 return sprintf(page, "TMROF: %lu\n", card->irqstat[11]);
2645 if (!left--)
2646 return sprintf(page, "PHYI: %lu\n", card->irqstat[10]);
2647 if (!left--)
2648 return sprintf(page, "FBQ3A: %lu\n", card->irqstat[8]);
2649 if (!left--)
2650 return sprintf(page, "FBQ2A: %lu\n", card->irqstat[7]);
2651 if (!left--)
2652 return sprintf(page, "RSQF: %lu\n", card->irqstat[6]);
2653 if (!left--)
2654 return sprintf(page, "EPDU: %lu\n", card->irqstat[5]);
2655 if (!left--)
2656 return sprintf(page, "RAWCF: %lu\n", card->irqstat[4]);
2657 if (!left--)
2658 return sprintf(page, "FBQ1A: %lu\n", card->irqstat[3]);
2659 if (!left--)
2660 return sprintf(page, "FBQ0A: %lu\n", card->irqstat[2]);
2661 if (!left--)
2662 return sprintf(page, "RSQAF: %lu\n", card->irqstat[1]);
2663 if (!left--)
2664 return sprintf(page, "IDT77252 Transmit Connection Table:\n");
2665
2666 for (i = 0; i < card->tct_size; i++) {
2667 unsigned long tct;
2668 struct atm_vcc *vcc;
2669 struct vc_map *vc;
2670 char *p;
2671
2672 vc = card->vcs[i];
2673 if (!vc)
2674 continue;
2675
2676 vcc = NULL;
2677 if (vc->tx_vcc)
2678 vcc = vc->tx_vcc;
2679 if (!vcc)
2680 continue;
2681 if (left--)
2682 continue;
2683
2684 p = page;
2685 p += sprintf(p, " %4u: %u.%u: ", i, vcc->vpi, vcc->vci);
2686 tct = (unsigned long) (card->tct_base + i * SAR_SRAM_TCT_SIZE);
2687
2688 for (i = 0; i < 8; i++)
2689 p += sprintf(p, " %08x", read_sram(card, tct + i));
2690 p += sprintf(p, "\n");
2691 return p - page;
2692 }
2693 return 0;
2694 }
2695
2696 /*****************************************************************************/
2697 /* */
2698 /* Interrupt handler */
2699 /* */
2700 /*****************************************************************************/
2701
2702 static void
2703 idt77252_collect_stat(struct idt77252_dev *card)
2704 {
2705 (void) readl(SAR_REG_CDC);
2706 (void) readl(SAR_REG_VPEC);
2707 (void) readl(SAR_REG_ICC);
2708
2709 }
2710
2711 static irqreturn_t
2712 idt77252_interrupt(int irq, void *dev_id)
2713 {
2714 struct idt77252_dev *card = dev_id;
2715 u32 stat;
2716
2717 stat = readl(SAR_REG_STAT) & 0xffff;
2718 if (!stat) /* no interrupt for us */
2719 return IRQ_NONE;
2720
2721 if (test_and_set_bit(IDT77252_BIT_INTERRUPT, &card->flags)) {
2722 printk("%s: Re-entering irq_handler()\n", card->name);
2723 goto out;
2724 }
2725
2726 writel(stat, SAR_REG_STAT); /* reset interrupt */
2727
2728 if (stat & SAR_STAT_TSIF) { /* entry written to TSQ */
2729 INTPRINTK("%s: TSIF\n", card->name);
2730 card->irqstat[15]++;
2731 idt77252_tx(card);
2732 }
2733 if (stat & SAR_STAT_TXICP) { /* Incomplete CS-PDU has */
2734 INTPRINTK("%s: TXICP\n", card->name);
2735 card->irqstat[14]++;
2736 #ifdef CONFIG_ATM_IDT77252_DEBUG
2737 idt77252_tx_dump(card);
2738 #endif
2739 }
2740 if (stat & SAR_STAT_TSQF) { /* TSQ 7/8 full */
2741 INTPRINTK("%s: TSQF\n", card->name);
2742 card->irqstat[12]++;
2743 idt77252_tx(card);
2744 }
2745 if (stat & SAR_STAT_TMROF) { /* Timer overflow */
2746 INTPRINTK("%s: TMROF\n", card->name);
2747 card->irqstat[11]++;
2748 idt77252_collect_stat(card);
2749 }
2750
2751 if (stat & SAR_STAT_EPDU) { /* Got complete CS-PDU */
2752 INTPRINTK("%s: EPDU\n", card->name);
2753 card->irqstat[5]++;
2754 idt77252_rx(card);
2755 }
2756 if (stat & SAR_STAT_RSQAF) { /* RSQ is 7/8 full */
2757 INTPRINTK("%s: RSQAF\n", card->name);
2758 card->irqstat[1]++;
2759 idt77252_rx(card);
2760 }
2761 if (stat & SAR_STAT_RSQF) { /* RSQ is full */
2762 INTPRINTK("%s: RSQF\n", card->name);
2763 card->irqstat[6]++;
2764 idt77252_rx(card);
2765 }
2766 if (stat & SAR_STAT_RAWCF) { /* Raw cell received */
2767 INTPRINTK("%s: RAWCF\n", card->name);
2768 card->irqstat[4]++;
2769 idt77252_rx_raw(card);
2770 }
2771
2772 if (stat & SAR_STAT_PHYI) { /* PHY device interrupt */
2773 INTPRINTK("%s: PHYI", card->name);
2774 card->irqstat[10]++;
2775 if (card->atmdev->phy && card->atmdev->phy->interrupt)
2776 card->atmdev->phy->interrupt(card->atmdev);
2777 }
2778
2779 if (stat & (SAR_STAT_FBQ0A | SAR_STAT_FBQ1A |
2780 SAR_STAT_FBQ2A | SAR_STAT_FBQ3A)) {
2781
2782 writel(readl(SAR_REG_CFG) & ~(SAR_CFG_FBIE), SAR_REG_CFG);
2783
2784 INTPRINTK("%s: FBQA: %04x\n", card->name, stat);
2785
2786 if (stat & SAR_STAT_FBQ0A)
2787 card->irqstat[2]++;
2788 if (stat & SAR_STAT_FBQ1A)
2789 card->irqstat[3]++;
2790 if (stat & SAR_STAT_FBQ2A)
2791 card->irqstat[7]++;
2792 if (stat & SAR_STAT_FBQ3A)
2793 card->irqstat[8]++;
2794
2795 schedule_work(&card->tqueue);
2796 }
2797
2798 out:
2799 clear_bit(IDT77252_BIT_INTERRUPT, &card->flags);
2800 return IRQ_HANDLED;
2801 }
2802
2803 static void
2804 idt77252_softint(struct work_struct *work)
2805 {
2806 struct idt77252_dev *card =
2807 container_of(work, struct idt77252_dev, tqueue);
2808 u32 stat;
2809 int done;
2810
2811 for (done = 1; ; done = 1) {
2812 stat = readl(SAR_REG_STAT) >> 16;
2813
2814 if ((stat & 0x0f) < SAR_FBQ0_HIGH) {
2815 add_rx_skb(card, 0, SAR_FB_SIZE_0, 32);
2816 done = 0;
2817 }
2818
2819 stat >>= 4;
2820 if ((stat & 0x0f) < SAR_FBQ1_HIGH) {
2821 add_rx_skb(card, 1, SAR_FB_SIZE_1, 32);
2822 done = 0;
2823 }
2824
2825 stat >>= 4;
2826 if ((stat & 0x0f) < SAR_FBQ2_HIGH) {
2827 add_rx_skb(card, 2, SAR_FB_SIZE_2, 32);
2828 done = 0;
2829 }
2830
2831 stat >>= 4;
2832 if ((stat & 0x0f) < SAR_FBQ3_HIGH) {
2833 add_rx_skb(card, 3, SAR_FB_SIZE_3, 32);
2834 done = 0;
2835 }
2836
2837 if (done)
2838 break;
2839 }
2840
2841 writel(readl(SAR_REG_CFG) | SAR_CFG_FBIE, SAR_REG_CFG);
2842 }
2843
2844
2845 static int
2846 open_card_oam(struct idt77252_dev *card)
2847 {
2848 unsigned long flags;
2849 unsigned long addr;
2850 struct vc_map *vc;
2851 int vpi, vci;
2852 int index;
2853 u32 rcte;
2854
2855 for (vpi = 0; vpi < (1 << card->vpibits); vpi++) {
2856 for (vci = 3; vci < 5; vci++) {
2857 index = VPCI2VC(card, vpi, vci);
2858
2859 vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2860 if (!vc) {
2861 printk("%s: can't alloc vc\n", card->name);
2862 return -ENOMEM;
2863 }
2864 vc->index = index;
2865 card->vcs[index] = vc;
2866
2867 flush_rx_pool(card, &vc->rcv.rx_pool);
2868
2869 rcte = SAR_RCTE_CONNECTOPEN |
2870 SAR_RCTE_RAWCELLINTEN |
2871 SAR_RCTE_RCQ |
2872 SAR_RCTE_FBP_1;
2873
2874 addr = card->rct_base + (vc->index << 2);
2875 write_sram(card, addr, rcte);
2876
2877 spin_lock_irqsave(&card->cmd_lock, flags);
2878 writel(SAR_CMD_OPEN_CONNECTION | (addr << 2),
2879 SAR_REG_CMD);
2880 waitfor_idle(card);
2881 spin_unlock_irqrestore(&card->cmd_lock, flags);
2882 }
2883 }
2884
2885 return 0;
2886 }
2887
2888 static void
2889 close_card_oam(struct idt77252_dev *card)
2890 {
2891 unsigned long flags;
2892 unsigned long addr;
2893 struct vc_map *vc;
2894 int vpi, vci;
2895 int index;
2896
2897 for (vpi = 0; vpi < (1 << card->vpibits); vpi++) {
2898 for (vci = 3; vci < 5; vci++) {
2899 index = VPCI2VC(card, vpi, vci);
2900 vc = card->vcs[index];
2901
2902 addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE;
2903
2904 spin_lock_irqsave(&card->cmd_lock, flags);
2905 writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2),
2906 SAR_REG_CMD);
2907 waitfor_idle(card);
2908 spin_unlock_irqrestore(&card->cmd_lock, flags);
2909
2910 if (skb_queue_len(&vc->rcv.rx_pool.queue) != 0) {
2911 DPRINTK("%s: closing a VC "
2912 "with pending rx buffers.\n",
2913 card->name);
2914
2915 recycle_rx_pool_skb(card, &vc->rcv.rx_pool);
2916 }
2917 }
2918 }
2919 }
2920
2921 static int
2922 open_card_ubr0(struct idt77252_dev *card)
2923 {
2924 struct vc_map *vc;
2925
2926 vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2927 if (!vc) {
2928 printk("%s: can't alloc vc\n", card->name);
2929 return -ENOMEM;
2930 }
2931 card->vcs[0] = vc;
2932 vc->class = SCHED_UBR0;
2933
2934 vc->scq = alloc_scq(card, vc->class);
2935 if (!vc->scq) {
2936 printk("%s: can't get SCQ.\n", card->name);
2937 return -ENOMEM;
2938 }
2939
2940 card->scd2vc[0] = vc;
2941 vc->scd_index = 0;
2942 vc->scq->scd = card->scd_base;
2943
2944 fill_scd(card, vc->scq, vc->class);
2945
2946 write_sram(card, card->tct_base + 0, TCT_UBR | card->scd_base);
2947 write_sram(card, card->tct_base + 1, 0);
2948 write_sram(card, card->tct_base + 2, 0);
2949 write_sram(card, card->tct_base + 3, 0);
2950 write_sram(card, card->tct_base + 4, 0);
2951 write_sram(card, card->tct_base + 5, 0);
2952 write_sram(card, card->tct_base + 6, 0);
2953 write_sram(card, card->tct_base + 7, TCT_FLAG_UBR);
2954
2955 clear_bit(VCF_IDLE, &vc->flags);
2956 writel(TCMDQ_START | 0, SAR_REG_TCMDQ);
2957 return 0;
2958 }
2959
2960 static int
2961 idt77252_dev_open(struct idt77252_dev *card)
2962 {
2963 u32 conf;
2964
2965 if (!test_bit(IDT77252_BIT_INIT, &card->flags)) {
2966 printk("%s: SAR not yet initialized.\n", card->name);
2967 return -1;
2968 }
2969
2970 conf = SAR_CFG_RXPTH| /* enable receive path */
2971 SAR_RX_DELAY | /* interrupt on complete PDU */
2972 SAR_CFG_RAWIE | /* interrupt enable on raw cells */
2973 SAR_CFG_RQFIE | /* interrupt on RSQ almost full */
2974 SAR_CFG_TMOIE | /* interrupt on timer overflow */
2975 SAR_CFG_FBIE | /* interrupt on low free buffers */
2976 SAR_CFG_TXEN | /* transmit operation enable */
2977 SAR_CFG_TXINT | /* interrupt on transmit status */
2978 SAR_CFG_TXUIE | /* interrupt on transmit underrun */
2979 SAR_CFG_TXSFI | /* interrupt on TSQ almost full */
2980 SAR_CFG_PHYIE /* enable PHY interrupts */
2981 ;
2982
2983 #ifdef CONFIG_ATM_IDT77252_RCV_ALL
2984 /* Test RAW cell receive. */
2985 conf |= SAR_CFG_VPECA;
2986 #endif
2987
2988 writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG);
2989
2990 if (open_card_oam(card)) {
2991 printk("%s: Error initializing OAM.\n", card->name);
2992 return -1;
2993 }
2994
2995 if (open_card_ubr0(card)) {
2996 printk("%s: Error initializing UBR0.\n", card->name);
2997 return -1;
2998 }
2999
3000 IPRINTK("%s: opened IDT77252 ABR SAR.\n", card->name);
3001 return 0;
3002 }
3003
3004 static void idt77252_dev_close(struct atm_dev *dev)
3005 {
3006 struct idt77252_dev *card = dev->dev_data;
3007 u32 conf;
3008
3009 close_card_oam(card);
3010
3011 conf = SAR_CFG_RXPTH | /* enable receive path */
3012 SAR_RX_DELAY | /* interrupt on complete PDU */
3013 SAR_CFG_RAWIE | /* interrupt enable on raw cells */
3014 SAR_CFG_RQFIE | /* interrupt on RSQ almost full */
3015 SAR_CFG_TMOIE | /* interrupt on timer overflow */
3016 SAR_CFG_FBIE | /* interrupt on low free buffers */
3017 SAR_CFG_TXEN | /* transmit operation enable */
3018 SAR_CFG_TXINT | /* interrupt on transmit status */
3019 SAR_CFG_TXUIE | /* interrupt on xmit underrun */
3020 SAR_CFG_TXSFI /* interrupt on TSQ almost full */
3021 ;
3022
3023 writel(readl(SAR_REG_CFG) & ~(conf), SAR_REG_CFG);
3024
3025 DIPRINTK("%s: closed IDT77252 ABR SAR.\n", card->name);
3026 }
3027
3028
3029 /*****************************************************************************/
3030 /* */
3031 /* Initialisation and Deinitialization of IDT77252 */
3032 /* */
3033 /*****************************************************************************/
3034
3035
3036 static void
3037 deinit_card(struct idt77252_dev *card)
3038 {
3039 struct sk_buff *skb;
3040 int i, j;
3041
3042 if (!test_bit(IDT77252_BIT_INIT, &card->flags)) {
3043 printk("%s: SAR not yet initialized.\n", card->name);
3044 return;
3045 }
3046 DIPRINTK("idt77252: deinitialize card %u\n", card->index);
3047
3048 writel(0, SAR_REG_CFG);
3049
3050 if (card->atmdev)
3051 atm_dev_deregister(card->atmdev);
3052
3053 for (i = 0; i < 4; i++) {
3054 for (j = 0; j < FBQ_SIZE; j++) {
3055 skb = card->sbpool[i].skb[j];
3056 if (skb) {
3057 dma_unmap_single(&card->pcidev->dev,
3058 IDT77252_PRV_PADDR(skb),
3059 (skb_end_pointer(skb) -
3060 skb->data),
3061 DMA_FROM_DEVICE);
3062 card->sbpool[i].skb[j] = NULL;
3063 dev_kfree_skb(skb);
3064 }
3065 }
3066 }
3067
3068 vfree(card->soft_tst);
3069
3070 vfree(card->scd2vc);
3071
3072 vfree(card->vcs);
3073
3074 if (card->raw_cell_hnd) {
3075 dma_free_coherent(&card->pcidev->dev, 2 * sizeof(u32),
3076 card->raw_cell_hnd, card->raw_cell_paddr);
3077 }
3078
3079 if (card->rsq.base) {
3080 DIPRINTK("%s: Release RSQ ...\n", card->name);
3081 deinit_rsq(card);
3082 }
3083
3084 if (card->tsq.base) {
3085 DIPRINTK("%s: Release TSQ ...\n", card->name);
3086 deinit_tsq(card);
3087 }
3088
3089 DIPRINTK("idt77252: Release IRQ.\n");
3090 free_irq(card->pcidev->irq, card);
3091
3092 for (i = 0; i < 4; i++) {
3093 if (card->fbq[i])
3094 iounmap(card->fbq[i]);
3095 }
3096
3097 if (card->membase)
3098 iounmap(card->membase);
3099
3100 clear_bit(IDT77252_BIT_INIT, &card->flags);
3101 DIPRINTK("%s: Card deinitialized.\n", card->name);
3102 }
3103
3104
3105 static void init_sram(struct idt77252_dev *card)
3106 {
3107 int i;
3108
3109 for (i = 0; i < card->sramsize; i += 4)
3110 write_sram(card, (i >> 2), 0);
3111
3112 /* set SRAM layout for THIS card */
3113 if (card->sramsize == (512 * 1024)) {
3114 card->tct_base = SAR_SRAM_TCT_128_BASE;
3115 card->tct_size = (SAR_SRAM_TCT_128_TOP - card->tct_base + 1)
3116 / SAR_SRAM_TCT_SIZE;
3117 card->rct_base = SAR_SRAM_RCT_128_BASE;
3118 card->rct_size = (SAR_SRAM_RCT_128_TOP - card->rct_base + 1)
3119 / SAR_SRAM_RCT_SIZE;
3120 card->rt_base = SAR_SRAM_RT_128_BASE;
3121 card->scd_base = SAR_SRAM_SCD_128_BASE;
3122 card->scd_size = (SAR_SRAM_SCD_128_TOP - card->scd_base + 1)
3123 / SAR_SRAM_SCD_SIZE;
3124 card->tst[0] = SAR_SRAM_TST1_128_BASE;
3125 card->tst[1] = SAR_SRAM_TST2_128_BASE;
3126 card->tst_size = SAR_SRAM_TST1_128_TOP - card->tst[0] + 1;
3127 card->abrst_base = SAR_SRAM_ABRSTD_128_BASE;
3128 card->abrst_size = SAR_ABRSTD_SIZE_8K;
3129 card->fifo_base = SAR_SRAM_FIFO_128_BASE;
3130 card->fifo_size = SAR_RXFD_SIZE_32K;
3131 } else {
3132 card->tct_base = SAR_SRAM_TCT_32_BASE;
3133 card->tct_size = (SAR_SRAM_TCT_32_TOP - card->tct_base + 1)
3134 / SAR_SRAM_TCT_SIZE;
3135 card->rct_base = SAR_SRAM_RCT_32_BASE;
3136 card->rct_size = (SAR_SRAM_RCT_32_TOP - card->rct_base + 1)
3137 / SAR_SRAM_RCT_SIZE;
3138 card->rt_base = SAR_SRAM_RT_32_BASE;
3139 card->scd_base = SAR_SRAM_SCD_32_BASE;
3140 card->scd_size = (SAR_SRAM_SCD_32_TOP - card->scd_base + 1)
3141 / SAR_SRAM_SCD_SIZE;
3142 card->tst[0] = SAR_SRAM_TST1_32_BASE;
3143 card->tst[1] = SAR_SRAM_TST2_32_BASE;
3144 card->tst_size = (SAR_SRAM_TST1_32_TOP - card->tst[0] + 1);
3145 card->abrst_base = SAR_SRAM_ABRSTD_32_BASE;
3146 card->abrst_size = SAR_ABRSTD_SIZE_1K;
3147 card->fifo_base = SAR_SRAM_FIFO_32_BASE;
3148 card->fifo_size = SAR_RXFD_SIZE_4K;
3149 }
3150
3151 /* Initialize TCT */
3152 for (i = 0; i < card->tct_size; i++) {
3153 write_sram(card, i * SAR_SRAM_TCT_SIZE + 0, 0);
3154 write_sram(card, i * SAR_SRAM_TCT_SIZE + 1, 0);
3155 write_sram(card, i * SAR_SRAM_TCT_SIZE + 2, 0);
3156 write_sram(card, i * SAR_SRAM_TCT_SIZE + 3, 0);
3157 write_sram(card, i * SAR_SRAM_TCT_SIZE + 4, 0);
3158 write_sram(card, i * SAR_SRAM_TCT_SIZE + 5, 0);
3159 write_sram(card, i * SAR_SRAM_TCT_SIZE + 6, 0);
3160 write_sram(card, i * SAR_SRAM_TCT_SIZE + 7, 0);
3161 }
3162
3163 /* Initialize RCT */
3164 for (i = 0; i < card->rct_size; i++) {
3165 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE,
3166 (u32) SAR_RCTE_RAWCELLINTEN);
3167 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 1,
3168 (u32) 0);
3169 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 2,
3170 (u32) 0);
3171 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 3,
3172 (u32) 0xffffffff);
3173 }
3174
3175 writel((SAR_FBQ0_LOW << 28) | (SAR_FB_SIZE_0 / 48), SAR_REG_FBQS0);
3176 writel((SAR_FBQ1_LOW << 28) | (SAR_FB_SIZE_1 / 48), SAR_REG_FBQS1);
3177 writel((SAR_FBQ2_LOW << 28) | (SAR_FB_SIZE_2 / 48), SAR_REG_FBQS2);
3178 writel((SAR_FBQ3_LOW << 28) | (SAR_FB_SIZE_3 / 48), SAR_REG_FBQS3);
3179
3180 /* Initialize rate table */
3181 for (i = 0; i < 256; i++) {
3182 write_sram(card, card->rt_base + i, log_to_rate[i]);
3183 }
3184
3185 for (i = 0; i < 128; i++) {
3186 unsigned int tmp;
3187
3188 tmp = rate_to_log[(i << 2) + 0] << 0;
3189 tmp |= rate_to_log[(i << 2) + 1] << 8;
3190 tmp |= rate_to_log[(i << 2) + 2] << 16;
3191 tmp |= rate_to_log[(i << 2) + 3] << 24;
3192 write_sram(card, card->rt_base + 256 + i, tmp);
3193 }
3194
3195 #if 0 /* Fill RDF and AIR tables. */
3196 for (i = 0; i < 128; i++) {
3197 unsigned int tmp;
3198
3199 tmp = RDF[0][(i << 1) + 0] << 16;
3200 tmp |= RDF[0][(i << 1) + 1] << 0;
3201 write_sram(card, card->rt_base + 512 + i, tmp);
3202 }
3203
3204 for (i = 0; i < 128; i++) {
3205 unsigned int tmp;
3206
3207 tmp = AIR[0][(i << 1) + 0] << 16;
3208 tmp |= AIR[0][(i << 1) + 1] << 0;
3209 write_sram(card, card->rt_base + 640 + i, tmp);
3210 }
3211 #endif
3212
3213 IPRINTK("%s: initialize rate table ...\n", card->name);
3214 writel(card->rt_base << 2, SAR_REG_RTBL);
3215
3216 /* Initialize TSTs */
3217 IPRINTK("%s: initialize TST ...\n", card->name);
3218 card->tst_free = card->tst_size - 2; /* last two are jumps */
3219
3220 for (i = card->tst[0]; i < card->tst[0] + card->tst_size - 2; i++)
3221 write_sram(card, i, TSTE_OPC_VAR);
3222 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2));
3223 idt77252_sram_write_errors = 1;
3224 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2));
3225 idt77252_sram_write_errors = 0;
3226 for (i = card->tst[1]; i < card->tst[1] + card->tst_size - 2; i++)
3227 write_sram(card, i, TSTE_OPC_VAR);
3228 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2));
3229 idt77252_sram_write_errors = 1;
3230 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2));
3231 idt77252_sram_write_errors = 0;
3232
3233 card->tst_index = 0;
3234 writel(card->tst[0] << 2, SAR_REG_TSTB);
3235
3236 /* Initialize ABRSTD and Receive FIFO */
3237 IPRINTK("%s: initialize ABRSTD ...\n", card->name);
3238 writel(card->abrst_size | (card->abrst_base << 2),
3239 SAR_REG_ABRSTD);
3240
3241 IPRINTK("%s: initialize receive fifo ...\n", card->name);
3242 writel(card->fifo_size | (card->fifo_base << 2),
3243 SAR_REG_RXFD);
3244
3245 IPRINTK("%s: SRAM initialization complete.\n", card->name);
3246 }
3247
3248 static int init_card(struct atm_dev *dev)
3249 {
3250 struct idt77252_dev *card = dev->dev_data;
3251 struct pci_dev *pcidev = card->pcidev;
3252 unsigned long tmpl, modl;
3253 unsigned int linkrate, rsvdcr;
3254 unsigned int tst_entries;
3255 struct net_device *tmp;
3256 char tname[10];
3257
3258 u32 size;
3259 u_char pci_byte;
3260 u32 conf;
3261 int i, k;
3262
3263 if (test_bit(IDT77252_BIT_INIT, &card->flags)) {
3264 printk("Error: SAR already initialized.\n");
3265 return -1;
3266 }
3267
3268 /*****************************************************************/
3269 /* P C I C O N F I G U R A T I O N */
3270 /*****************************************************************/
3271
3272 /* Set PCI Retry-Timeout and TRDY timeout */
3273 IPRINTK("%s: Checking PCI retries.\n", card->name);
3274 if (pci_read_config_byte(pcidev, 0x40, &pci_byte) != 0) {
3275 printk("%s: can't read PCI retry timeout.\n", card->name);
3276 deinit_card(card);
3277 return -1;
3278 }
3279 if (pci_byte != 0) {
3280 IPRINTK("%s: PCI retry timeout: %d, set to 0.\n",
3281 card->name, pci_byte);
3282 if (pci_write_config_byte(pcidev, 0x40, 0) != 0) {
3283 printk("%s: can't set PCI retry timeout.\n",
3284 card->name);
3285 deinit_card(card);
3286 return -1;
3287 }
3288 }
3289 IPRINTK("%s: Checking PCI TRDY.\n", card->name);
3290 if (pci_read_config_byte(pcidev, 0x41, &pci_byte) != 0) {
3291 printk("%s: can't read PCI TRDY timeout.\n", card->name);
3292 deinit_card(card);
3293 return -1;
3294 }
3295 if (pci_byte != 0) {
3296 IPRINTK("%s: PCI TRDY timeout: %d, set to 0.\n",
3297 card->name, pci_byte);
3298 if (pci_write_config_byte(pcidev, 0x41, 0) != 0) {
3299 printk("%s: can't set PCI TRDY timeout.\n", card->name);
3300 deinit_card(card);
3301 return -1;
3302 }
3303 }
3304 /* Reset Timer register */
3305 if (readl(SAR_REG_STAT) & SAR_STAT_TMROF) {
3306 printk("%s: resetting timer overflow.\n", card->name);
3307 writel(SAR_STAT_TMROF, SAR_REG_STAT);
3308 }
3309 IPRINTK("%s: Request IRQ ... ", card->name);
3310 if (request_irq(pcidev->irq, idt77252_interrupt, IRQF_SHARED,
3311 card->name, card) != 0) {
3312 printk("%s: can't allocate IRQ.\n", card->name);
3313 deinit_card(card);
3314 return -1;
3315 }
3316 IPRINTK("got %d.\n", pcidev->irq);
3317
3318 /*****************************************************************/
3319 /* C H E C K A N D I N I T S R A M */
3320 /*****************************************************************/
3321
3322 IPRINTK("%s: Initializing SRAM\n", card->name);
3323
3324 /* preset size of connecton table, so that init_sram() knows about it */
3325 conf = SAR_CFG_TX_FIFO_SIZE_9 | /* Use maximum fifo size */
3326 SAR_CFG_RXSTQ_SIZE_8k | /* Receive Status Queue is 8k */
3327 SAR_CFG_IDLE_CLP | /* Set CLP on idle cells */
3328 #ifndef ATM_IDT77252_SEND_IDLE
3329 SAR_CFG_NO_IDLE | /* Do not send idle cells */
3330 #endif
3331 0;
3332
3333 if (card->sramsize == (512 * 1024))
3334 conf |= SAR_CFG_CNTBL_1k;
3335 else
3336 conf |= SAR_CFG_CNTBL_512;
3337
3338 switch (vpibits) {
3339 case 0:
3340 conf |= SAR_CFG_VPVCS_0;
3341 break;
3342 default:
3343 case 1:
3344 conf |= SAR_CFG_VPVCS_1;
3345 break;
3346 case 2:
3347 conf |= SAR_CFG_VPVCS_2;
3348 break;
3349 case 8:
3350 conf |= SAR_CFG_VPVCS_8;
3351 break;
3352 }
3353
3354 writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG);
3355
3356 init_sram(card);
3357
3358 /********************************************************************/
3359 /* 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 */
3360 /********************************************************************/
3361 /* Initialize TSQ */
3362 if (0 != init_tsq(card)) {
3363 deinit_card(card);
3364 return -1;
3365 }
3366 /* Initialize RSQ */
3367 if (0 != init_rsq(card)) {
3368 deinit_card(card);
3369 return -1;
3370 }
3371
3372 card->vpibits = vpibits;
3373 if (card->sramsize == (512 * 1024)) {
3374 card->vcibits = 10 - card->vpibits;
3375 } else {
3376 card->vcibits = 9 - card->vpibits;
3377 }
3378
3379 card->vcimask = 0;
3380 for (k = 0, i = 1; k < card->vcibits; k++) {
3381 card->vcimask |= i;
3382 i <<= 1;
3383 }
3384
3385 IPRINTK("%s: Setting VPI/VCI mask to zero.\n", card->name);
3386 writel(0, SAR_REG_VPM);
3387
3388 /* Little Endian Order */
3389 writel(0, SAR_REG_GP);
3390
3391 /* Initialize RAW Cell Handle Register */
3392 card->raw_cell_hnd = dma_alloc_coherent(&card->pcidev->dev,
3393 2 * sizeof(u32),
3394 &card->raw_cell_paddr,
3395 GFP_KERNEL);
3396 if (!card->raw_cell_hnd) {
3397 printk("%s: memory allocation failure.\n", card->name);
3398 deinit_card(card);
3399 return -1;
3400 }
3401 writel(card->raw_cell_paddr, SAR_REG_RAWHND);
3402 IPRINTK("%s: raw cell handle is at 0x%p.\n", card->name,
3403 card->raw_cell_hnd);
3404
3405 size = sizeof(struct vc_map *) * card->tct_size;
3406 IPRINTK("%s: allocate %d byte for VC map.\n", card->name, size);
3407 card->vcs = vzalloc(size);
3408 if (!card->vcs) {
3409 printk("%s: memory allocation failure.\n", card->name);
3410 deinit_card(card);
3411 return -1;
3412 }
3413
3414 size = sizeof(struct vc_map *) * card->scd_size;
3415 IPRINTK("%s: allocate %d byte for SCD to VC mapping.\n",
3416 card->name, size);
3417 card->scd2vc = vzalloc(size);
3418 if (!card->scd2vc) {
3419 printk("%s: memory allocation failure.\n", card->name);
3420 deinit_card(card);
3421 return -1;
3422 }
3423
3424 size = sizeof(struct tst_info) * (card->tst_size - 2);
3425 IPRINTK("%s: allocate %d byte for TST to VC mapping.\n",
3426 card->name, size);
3427 card->soft_tst = vmalloc(size);
3428 if (!card->soft_tst) {
3429 printk("%s: memory allocation failure.\n", card->name);
3430 deinit_card(card);
3431 return -1;
3432 }
3433 for (i = 0; i < card->tst_size - 2; i++) {
3434 card->soft_tst[i].tste = TSTE_OPC_VAR;
3435 card->soft_tst[i].vc = NULL;
3436 }
3437
3438 if (dev->phy == NULL) {
3439 printk("%s: No LT device defined.\n", card->name);
3440 deinit_card(card);
3441 return -1;
3442 }
3443 if (dev->phy->ioctl == NULL) {
3444 printk("%s: LT had no IOCTL function defined.\n", card->name);
3445 deinit_card(card);
3446 return -1;
3447 }
3448
3449 #ifdef CONFIG_ATM_IDT77252_USE_SUNI
3450 /*
3451 * this is a jhs hack to get around special functionality in the
3452 * phy driver for the atecom hardware; the functionality doesn't
3453 * exist in the linux atm suni driver
3454 *
3455 * it isn't the right way to do things, but as the guy from NIST
3456 * said, talking about their measurement of the fine structure
3457 * constant, "it's good enough for government work."
3458 */
3459 linkrate = 149760000;
3460 #endif
3461
3462 card->link_pcr = (linkrate / 8 / 53);
3463 printk("%s: Linkrate on ATM line : %u bit/s, %u cell/s.\n",
3464 card->name, linkrate, card->link_pcr);
3465
3466 #ifdef ATM_IDT77252_SEND_IDLE
3467 card->utopia_pcr = card->link_pcr;
3468 #else
3469 card->utopia_pcr = (160000000 / 8 / 54);
3470 #endif
3471
3472 rsvdcr = 0;
3473 if (card->utopia_pcr > card->link_pcr)
3474 rsvdcr = card->utopia_pcr - card->link_pcr;
3475
3476 tmpl = (unsigned long) rsvdcr * ((unsigned long) card->tst_size - 2);
3477 modl = tmpl % (unsigned long)card->utopia_pcr;
3478 tst_entries = (int) (tmpl / (unsigned long)card->utopia_pcr);
3479 if (modl)
3480 tst_entries++;
3481 card->tst_free -= tst_entries;
3482 fill_tst(card, NULL, tst_entries, TSTE_OPC_NULL);
3483
3484 #ifdef HAVE_EEPROM
3485 idt77252_eeprom_init(card);
3486 printk("%s: EEPROM: %02x:", card->name,
3487 idt77252_eeprom_read_status(card));
3488
3489 for (i = 0; i < 0x80; i++) {
3490 printk(" %02x",
3491 idt77252_eeprom_read_byte(card, i)
3492 );
3493 }
3494 printk("\n");
3495 #endif /* HAVE_EEPROM */
3496
3497 /*
3498 * XXX: <hack>
3499 */
3500 sprintf(tname, "eth%d", card->index);
3501 tmp = dev_get_by_name(&init_net, tname); /* jhs: was "tmp = dev_get(tname);" */
3502 if (tmp) {
3503 memcpy(card->atmdev->esi, tmp->dev_addr, 6);
3504 dev_put(tmp);
3505 printk("%s: ESI %pM\n", card->name, card->atmdev->esi);
3506 }
3507 /*
3508 * XXX: </hack>
3509 */
3510
3511 /* Set Maximum Deficit Count for now. */
3512 writel(0xffff, SAR_REG_MDFCT);
3513
3514 set_bit(IDT77252_BIT_INIT, &card->flags);
3515
3516 XPRINTK("%s: IDT77252 ABR SAR initialization complete.\n", card->name);
3517 return 0;
3518 }
3519
3520
3521 /*****************************************************************************/
3522 /* */
3523 /* Probing of IDT77252 ABR SAR */
3524 /* */
3525 /*****************************************************************************/
3526
3527
3528 static int idt77252_preset(struct idt77252_dev *card)
3529 {
3530 u16 pci_command;
3531
3532 /*****************************************************************/
3533 /* P C I C O N F I G U R A T I O N */
3534 /*****************************************************************/
3535
3536 XPRINTK("%s: Enable PCI master and memory access for SAR.\n",
3537 card->name);
3538 if (pci_read_config_word(card->pcidev, PCI_COMMAND, &pci_command)) {
3539 printk("%s: can't read PCI_COMMAND.\n", card->name);
3540 deinit_card(card);
3541 return -1;
3542 }
3543 if (!(pci_command & PCI_COMMAND_IO)) {
3544 printk("%s: PCI_COMMAND: %04x (???)\n",
3545 card->name, pci_command);
3546 deinit_card(card);
3547 return (-1);
3548 }
3549 pci_command |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
3550 if (pci_write_config_word(card->pcidev, PCI_COMMAND, pci_command)) {
3551 printk("%s: can't write PCI_COMMAND.\n", card->name);
3552 deinit_card(card);
3553 return -1;
3554 }
3555 /*****************************************************************/
3556 /* G E N E R I C R E S E T */
3557 /*****************************************************************/
3558
3559 /* Software reset */
3560 writel(SAR_CFG_SWRST, SAR_REG_CFG);
3561 mdelay(1);
3562 writel(0, SAR_REG_CFG);
3563
3564 IPRINTK("%s: Software resetted.\n", card->name);
3565 return 0;
3566 }
3567
3568
3569 static unsigned long probe_sram(struct idt77252_dev *card)
3570 {
3571 u32 data, addr;
3572
3573 writel(0, SAR_REG_DR0);
3574 writel(SAR_CMD_WRITE_SRAM | (0 << 2), SAR_REG_CMD);
3575
3576 for (addr = 0x4000; addr < 0x80000; addr += 0x4000) {
3577 writel(ATM_POISON, SAR_REG_DR0);
3578 writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD);
3579
3580 writel(SAR_CMD_READ_SRAM | (0 << 2), SAR_REG_CMD);
3581 data = readl(SAR_REG_DR0);
3582
3583 if (data != 0)
3584 break;
3585 }
3586
3587 return addr * sizeof(u32);
3588 }
3589
3590 static int idt77252_init_one(struct pci_dev *pcidev,
3591 const struct pci_device_id *id)
3592 {
3593 static struct idt77252_dev **last = &idt77252_chain;
3594 static int index = 0;
3595
3596 unsigned long membase, srambase;
3597 struct idt77252_dev *card;
3598 struct atm_dev *dev;
3599 int i, err;
3600
3601
3602 if ((err = pci_enable_device(pcidev))) {
3603 printk("idt77252: can't enable PCI device at %s\n", pci_name(pcidev));
3604 return err;
3605 }
3606
3607 if ((err = dma_set_mask_and_coherent(&pcidev->dev, DMA_BIT_MASK(32)))) {
3608 printk("idt77252: can't enable DMA for PCI device at %s\n", pci_name(pcidev));
3609 return err;
3610 }
3611
3612 card = kzalloc(sizeof(struct idt77252_dev), GFP_KERNEL);
3613 if (!card) {
3614 printk("idt77252-%d: can't allocate private data\n", index);
3615 err = -ENOMEM;
3616 goto err_out_disable_pdev;
3617 }
3618 card->revision = pcidev->revision;
3619 card->index = index;
3620 card->pcidev = pcidev;
3621 sprintf(card->name, "idt77252-%d", card->index);
3622
3623 INIT_WORK(&card->tqueue, idt77252_softint);
3624
3625 membase = pci_resource_start(pcidev, 1);
3626 srambase = pci_resource_start(pcidev, 2);
3627
3628 mutex_init(&card->mutex);
3629 spin_lock_init(&card->cmd_lock);
3630 spin_lock_init(&card->tst_lock);
3631
3632 timer_setup(&card->tst_timer, tst_timer, 0);
3633
3634 /* Do the I/O remapping... */
3635 card->membase = ioremap(membase, 1024);
3636 if (!card->membase) {
3637 printk("%s: can't ioremap() membase\n", card->name);
3638 err = -EIO;
3639 goto err_out_free_card;
3640 }
3641
3642 if (idt77252_preset(card)) {
3643 printk("%s: preset failed\n", card->name);
3644 err = -EIO;
3645 goto err_out_iounmap;
3646 }
3647
3648 dev = atm_dev_register("idt77252", &pcidev->dev, &idt77252_ops, -1,
3649 NULL);
3650 if (!dev) {
3651 printk("%s: can't register atm device\n", card->name);
3652 err = -EIO;
3653 goto err_out_iounmap;
3654 }
3655 dev->dev_data = card;
3656 card->atmdev = dev;
3657
3658 #ifdef CONFIG_ATM_IDT77252_USE_SUNI
3659 suni_init(dev);
3660 if (!dev->phy) {
3661 printk("%s: can't init SUNI\n", card->name);
3662 err = -EIO;
3663 goto err_out_deinit_card;
3664 }
3665 #endif /* CONFIG_ATM_IDT77252_USE_SUNI */
3666
3667 card->sramsize = probe_sram(card);
3668
3669 for (i = 0; i < 4; i++) {
3670 card->fbq[i] = ioremap(srambase | 0x200000 | (i << 18), 4);
3671 if (!card->fbq[i]) {
3672 printk("%s: can't ioremap() FBQ%d\n", card->name, i);
3673 err = -EIO;
3674 goto err_out_deinit_card;
3675 }
3676 }
3677
3678 printk("%s: ABR SAR (Rev %c): MEM %08lx SRAM %08lx [%u KB]\n",
3679 card->name, ((card->revision > 1) && (card->revision < 25)) ?
3680 'A' + card->revision - 1 : '?', membase, srambase,
3681 card->sramsize / 1024);
3682
3683 if (init_card(dev)) {
3684 printk("%s: init_card failed\n", card->name);
3685 err = -EIO;
3686 goto err_out_deinit_card;
3687 }
3688
3689 dev->ci_range.vpi_bits = card->vpibits;
3690 dev->ci_range.vci_bits = card->vcibits;
3691 dev->link_rate = card->link_pcr;
3692
3693 if (dev->phy->start)
3694 dev->phy->start(dev);
3695
3696 if (idt77252_dev_open(card)) {
3697 printk("%s: dev_open failed\n", card->name);
3698 err = -EIO;
3699 goto err_out_stop;
3700 }
3701
3702 *last = card;
3703 last = &card->next;
3704 index++;
3705
3706 return 0;
3707
3708 err_out_stop:
3709 if (dev->phy->stop)
3710 dev->phy->stop(dev);
3711
3712 err_out_deinit_card:
3713 deinit_card(card);
3714
3715 err_out_iounmap:
3716 iounmap(card->membase);
3717
3718 err_out_free_card:
3719 kfree(card);
3720
3721 err_out_disable_pdev:
3722 pci_disable_device(pcidev);
3723 return err;
3724 }
3725
3726 static const struct pci_device_id idt77252_pci_tbl[] =
3727 {
3728 { PCI_VDEVICE(IDT, PCI_DEVICE_ID_IDT_IDT77252), 0 },
3729 { 0, }
3730 };
3731
3732 MODULE_DEVICE_TABLE(pci, idt77252_pci_tbl);
3733
3734 static struct pci_driver idt77252_driver = {
3735 .name = "idt77252",
3736 .id_table = idt77252_pci_tbl,
3737 .probe = idt77252_init_one,
3738 };
3739
3740 static int __init idt77252_init(void)
3741 {
3742 struct sk_buff *skb;
3743
3744 printk("%s: at %p\n", __func__, idt77252_init);
3745
3746 if (sizeof(skb->cb) < sizeof(struct atm_skb_data) +
3747 sizeof(struct idt77252_skb_prv)) {
3748 printk(KERN_ERR "%s: skb->cb is too small (%lu < %lu)\n",
3749 __func__, (unsigned long) sizeof(skb->cb),
3750 (unsigned long) sizeof(struct atm_skb_data) +
3751 sizeof(struct idt77252_skb_prv));
3752 return -EIO;
3753 }
3754
3755 return pci_register_driver(&idt77252_driver);
3756 }
3757
3758 static void __exit idt77252_exit(void)
3759 {
3760 struct idt77252_dev *card;
3761 struct atm_dev *dev;
3762
3763 pci_unregister_driver(&idt77252_driver);
3764
3765 while (idt77252_chain) {
3766 card = idt77252_chain;
3767 dev = card->atmdev;
3768 idt77252_chain = card->next;
3769
3770 if (dev->phy->stop)
3771 dev->phy->stop(dev);
3772 deinit_card(card);
3773 pci_disable_device(card->pcidev);
3774 kfree(card);
3775 }
3776
3777 DIPRINTK("idt77252: finished cleanup-module().\n");
3778 }
3779
3780 module_init(idt77252_init);
3781 module_exit(idt77252_exit);
3782
3783 MODULE_LICENSE("GPL");
3784
3785 module_param(vpibits, uint, 0);
3786 MODULE_PARM_DESC(vpibits, "number of VPI bits supported (0, 1, or 2)");
3787 #ifdef CONFIG_ATM_IDT77252_DEBUG
3788 module_param(debug, ulong, 0644);
3789 MODULE_PARM_DESC(debug, "debug bitmap, see drivers/atm/idt77252.h");
3790 #endif
3791
3792 MODULE_AUTHOR("Eddie C. Dost <ecd@atecom.com>");
3793 MODULE_DESCRIPTION("IDT77252 ABR SAR Driver");
Linux with added FPC-III support