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serial: imx: fix polarity of RI
[deliverable/linux.git] / drivers / atm / idt77252.c
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 <asm/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 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_zalloc_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 (atomic_read(&sk->sk_wmem_alloc) >
728 (sk->sk_sndbuf >> 1)) {
729 u32 cps = vc->estimator->maxcps;
730
731 vc->estimator->cps = cps;
732 vc->estimator->avcps = cps << 5;
733 if (vc->lacr < vc->init_er) {
734 vc->lacr = vc->init_er;
735 writel(TCMDQ_LACR | (vc->lacr << 16) |
736 vc->index, SAR_REG_TCMDQ);
737 }
738 }
739 }
740 spin_unlock_irqrestore(&vc->lock, flags);
741
742 tbd = &IDT77252_PRV_TBD(skb);
743
744 spin_lock_irqsave(&scq->lock, flags);
745 scq->next->word_1 = cpu_to_le32(tbd->word_1 |
746 SAR_TBD_TSIF | SAR_TBD_GTSI);
747 scq->next->word_2 = cpu_to_le32(tbd->word_2);
748 scq->next->word_3 = cpu_to_le32(tbd->word_3);
749 scq->next->word_4 = cpu_to_le32(tbd->word_4);
750
751 if (scq->next == scq->last)
752 scq->next = scq->base;
753 else
754 scq->next++;
755
756 write_sram(card, scq->scd,
757 scq->paddr +
758 (u32)((unsigned long)scq->next - (unsigned long)scq->base));
759 spin_unlock_irqrestore(&scq->lock, flags);
760
761 scq->trans_start = jiffies;
762
763 if (test_and_clear_bit(VCF_IDLE, &vc->flags)) {
764 writel(TCMDQ_START_LACR | (vc->lacr << 16) | vc->index,
765 SAR_REG_TCMDQ);
766 }
767
768 TXPRINTK("%d entries in SCQ used (push).\n", atomic_read(&scq->used));
769
770 XPRINTK("%s: SCQ (after push %2d) head = 0x%x, next = 0x%p.\n",
771 card->name, atomic_read(&scq->used),
772 read_sram(card, scq->scd + 1), scq->next);
773
774 return 0;
775
776 out:
777 if (time_after(jiffies, scq->trans_start + HZ)) {
778 printk("%s: Error pushing TBD for %d.%d\n",
779 card->name, vc->tx_vcc->vpi, vc->tx_vcc->vci);
780 #ifdef CONFIG_ATM_IDT77252_DEBUG
781 idt77252_tx_dump(card);
782 #endif
783 scq->trans_start = jiffies;
784 }
785
786 return -ENOBUFS;
787 }
788
789
790 static void
791 drain_scq(struct idt77252_dev *card, struct vc_map *vc)
792 {
793 struct scq_info *scq = vc->scq;
794 struct sk_buff *skb;
795 struct atm_vcc *vcc;
796
797 TXPRINTK("%s: SCQ (before drain %2d) next = 0x%p.\n",
798 card->name, atomic_read(&scq->used), scq->next);
799
800 skb = skb_dequeue(&scq->transmit);
801 if (skb) {
802 TXPRINTK("%s: freeing skb at %p.\n", card->name, skb);
803
804 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_zalloc_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 memcpy(skb_put(sb, ATM_CELL_PAYLOAD),
1094 cell, ATM_CELL_PAYLOAD);
1095
1096 ATM_SKB(sb)->vcc = vcc;
1097 __net_timestamp(sb);
1098 vcc->push(vcc, sb);
1099 atomic_inc(&vcc->stats->rx);
1100
1101 cell += ATM_CELL_PAYLOAD;
1102 }
1103
1104 recycle_rx_skb(card, skb);
1105 return;
1106 }
1107 if (vcc->qos.aal != ATM_AAL5) {
1108 printk("%s: Unexpected AAL type in dequeue_rx(): %d.\n",
1109 card->name, vcc->qos.aal);
1110 recycle_rx_skb(card, skb);
1111 return;
1112 }
1113 skb->len = (stat & SAR_RSQE_CELLCNT) * ATM_CELL_PAYLOAD;
1114
1115 rpp = &vc->rcv.rx_pool;
1116
1117 __skb_queue_tail(&rpp->queue, skb);
1118 rpp->len += skb->len;
1119
1120 if (stat & SAR_RSQE_EPDU) {
1121 unsigned char *l1l2;
1122 unsigned int len;
1123
1124 l1l2 = (unsigned char *) ((unsigned long) skb->data + skb->len - 6);
1125
1126 len = (l1l2[0] << 8) | l1l2[1];
1127 len = len ? len : 0x10000;
1128
1129 RXPRINTK("%s: PDU has %d bytes.\n", card->name, len);
1130
1131 if ((len + 8 > rpp->len) || (len + (47 + 8) < rpp->len)) {
1132 RXPRINTK("%s: AAL5 PDU size mismatch: %d != %d. "
1133 "(CDC: %08x)\n",
1134 card->name, len, rpp->len, readl(SAR_REG_CDC));
1135 recycle_rx_pool_skb(card, rpp);
1136 atomic_inc(&vcc->stats->rx_err);
1137 return;
1138 }
1139 if (stat & SAR_RSQE_CRC) {
1140 RXPRINTK("%s: AAL5 CRC error.\n", card->name);
1141 recycle_rx_pool_skb(card, rpp);
1142 atomic_inc(&vcc->stats->rx_err);
1143 return;
1144 }
1145 if (skb_queue_len(&rpp->queue) > 1) {
1146 struct sk_buff *sb;
1147
1148 skb = dev_alloc_skb(rpp->len);
1149 if (!skb) {
1150 RXPRINTK("%s: Can't alloc RX skb.\n",
1151 card->name);
1152 recycle_rx_pool_skb(card, rpp);
1153 atomic_inc(&vcc->stats->rx_err);
1154 return;
1155 }
1156 if (!atm_charge(vcc, skb->truesize)) {
1157 recycle_rx_pool_skb(card, rpp);
1158 dev_kfree_skb(skb);
1159 return;
1160 }
1161 skb_queue_walk(&rpp->queue, sb)
1162 memcpy(skb_put(skb, sb->len),
1163 sb->data, sb->len);
1164
1165 recycle_rx_pool_skb(card, rpp);
1166
1167 skb_trim(skb, len);
1168 ATM_SKB(skb)->vcc = vcc;
1169 __net_timestamp(skb);
1170
1171 vcc->push(vcc, skb);
1172 atomic_inc(&vcc->stats->rx);
1173
1174 return;
1175 }
1176
1177 flush_rx_pool(card, rpp);
1178
1179 if (!atm_charge(vcc, skb->truesize)) {
1180 recycle_rx_skb(card, skb);
1181 return;
1182 }
1183
1184 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
1185 skb_end_pointer(skb) - skb->data,
1186 DMA_FROM_DEVICE);
1187 sb_pool_remove(card, skb);
1188
1189 skb_trim(skb, len);
1190 ATM_SKB(skb)->vcc = vcc;
1191 __net_timestamp(skb);
1192
1193 vcc->push(vcc, skb);
1194 atomic_inc(&vcc->stats->rx);
1195
1196 if (skb->truesize > SAR_FB_SIZE_3)
1197 add_rx_skb(card, 3, SAR_FB_SIZE_3, 1);
1198 else if (skb->truesize > SAR_FB_SIZE_2)
1199 add_rx_skb(card, 2, SAR_FB_SIZE_2, 1);
1200 else if (skb->truesize > SAR_FB_SIZE_1)
1201 add_rx_skb(card, 1, SAR_FB_SIZE_1, 1);
1202 else
1203 add_rx_skb(card, 0, SAR_FB_SIZE_0, 1);
1204 return;
1205 }
1206 }
1207
1208 static void
1209 idt77252_rx(struct idt77252_dev *card)
1210 {
1211 struct rsq_entry *rsqe;
1212
1213 if (card->rsq.next == card->rsq.last)
1214 rsqe = card->rsq.base;
1215 else
1216 rsqe = card->rsq.next + 1;
1217
1218 if (!(le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID)) {
1219 RXPRINTK("%s: no entry in RSQ.\n", card->name);
1220 return;
1221 }
1222
1223 do {
1224 dequeue_rx(card, rsqe);
1225 rsqe->word_4 = 0;
1226 card->rsq.next = rsqe;
1227 if (card->rsq.next == card->rsq.last)
1228 rsqe = card->rsq.base;
1229 else
1230 rsqe = card->rsq.next + 1;
1231 } while (le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID);
1232
1233 writel((unsigned long) card->rsq.next - (unsigned long) card->rsq.base,
1234 SAR_REG_RSQH);
1235 }
1236
1237 static void
1238 idt77252_rx_raw(struct idt77252_dev *card)
1239 {
1240 struct sk_buff *queue;
1241 u32 head, tail;
1242 struct atm_vcc *vcc;
1243 struct vc_map *vc;
1244 struct sk_buff *sb;
1245
1246 if (card->raw_cell_head == NULL) {
1247 u32 handle = le32_to_cpu(*(card->raw_cell_hnd + 1));
1248 card->raw_cell_head = sb_pool_skb(card, handle);
1249 }
1250
1251 queue = card->raw_cell_head;
1252 if (!queue)
1253 return;
1254
1255 head = IDT77252_PRV_PADDR(queue) + (queue->data - queue->head - 16);
1256 tail = readl(SAR_REG_RAWCT);
1257
1258 dma_sync_single_for_cpu(&card->pcidev->dev, IDT77252_PRV_PADDR(queue),
1259 skb_end_offset(queue) - 16,
1260 DMA_FROM_DEVICE);
1261
1262 while (head != tail) {
1263 unsigned int vpi, vci;
1264 u32 header;
1265
1266 header = le32_to_cpu(*(u32 *) &queue->data[0]);
1267
1268 vpi = (header & ATM_HDR_VPI_MASK) >> ATM_HDR_VPI_SHIFT;
1269 vci = (header & ATM_HDR_VCI_MASK) >> ATM_HDR_VCI_SHIFT;
1270
1271 #ifdef CONFIG_ATM_IDT77252_DEBUG
1272 if (debug & DBG_RAW_CELL) {
1273 int i;
1274
1275 printk("%s: raw cell %x.%02x.%04x.%x.%x\n",
1276 card->name, (header >> 28) & 0x000f,
1277 (header >> 20) & 0x00ff,
1278 (header >> 4) & 0xffff,
1279 (header >> 1) & 0x0007,
1280 (header >> 0) & 0x0001);
1281 for (i = 16; i < 64; i++)
1282 printk(" %02x", queue->data[i]);
1283 printk("\n");
1284 }
1285 #endif
1286
1287 if (vpi >= (1<<card->vpibits) || vci >= (1<<card->vcibits)) {
1288 RPRINTK("%s: SDU received for out-of-range vc %u.%u\n",
1289 card->name, vpi, vci);
1290 goto drop;
1291 }
1292
1293 vc = card->vcs[VPCI2VC(card, vpi, vci)];
1294 if (!vc || !test_bit(VCF_RX, &vc->flags)) {
1295 RPRINTK("%s: SDU received on non RX vc %u.%u\n",
1296 card->name, vpi, vci);
1297 goto drop;
1298 }
1299
1300 vcc = vc->rx_vcc;
1301
1302 if (vcc->qos.aal != ATM_AAL0) {
1303 RPRINTK("%s: raw cell for non AAL0 vc %u.%u\n",
1304 card->name, vpi, vci);
1305 atomic_inc(&vcc->stats->rx_drop);
1306 goto drop;
1307 }
1308
1309 if ((sb = dev_alloc_skb(64)) == NULL) {
1310 printk("%s: Can't allocate buffers for AAL0.\n",
1311 card->name);
1312 atomic_inc(&vcc->stats->rx_err);
1313 goto drop;
1314 }
1315
1316 if (!atm_charge(vcc, sb->truesize)) {
1317 RXPRINTK("%s: atm_charge() dropped AAL0 packets.\n",
1318 card->name);
1319 dev_kfree_skb(sb);
1320 goto drop;
1321 }
1322
1323 *((u32 *) sb->data) = header;
1324 skb_put(sb, sizeof(u32));
1325 memcpy(skb_put(sb, ATM_CELL_PAYLOAD), &(queue->data[16]),
1326 ATM_CELL_PAYLOAD);
1327
1328 ATM_SKB(sb)->vcc = vcc;
1329 __net_timestamp(sb);
1330 vcc->push(vcc, sb);
1331 atomic_inc(&vcc->stats->rx);
1332
1333 drop:
1334 skb_pull(queue, 64);
1335
1336 head = IDT77252_PRV_PADDR(queue)
1337 + (queue->data - queue->head - 16);
1338
1339 if (queue->len < 128) {
1340 struct sk_buff *next;
1341 u32 handle;
1342
1343 head = le32_to_cpu(*(u32 *) &queue->data[0]);
1344 handle = le32_to_cpu(*(u32 *) &queue->data[4]);
1345
1346 next = sb_pool_skb(card, handle);
1347 recycle_rx_skb(card, queue);
1348
1349 if (next) {
1350 card->raw_cell_head = next;
1351 queue = card->raw_cell_head;
1352 dma_sync_single_for_cpu(&card->pcidev->dev,
1353 IDT77252_PRV_PADDR(queue),
1354 (skb_end_pointer(queue) -
1355 queue->data),
1356 DMA_FROM_DEVICE);
1357 } else {
1358 card->raw_cell_head = NULL;
1359 printk("%s: raw cell queue overrun\n",
1360 card->name);
1361 break;
1362 }
1363 }
1364 }
1365 }
1366
1367
1368 /*****************************************************************************/
1369 /* */
1370 /* TSQ Handling */
1371 /* */
1372 /*****************************************************************************/
1373
1374 static int
1375 init_tsq(struct idt77252_dev *card)
1376 {
1377 struct tsq_entry *tsqe;
1378
1379 card->tsq.base = dma_alloc_coherent(&card->pcidev->dev, RSQSIZE,
1380 &card->tsq.paddr, GFP_KERNEL);
1381 if (card->tsq.base == NULL) {
1382 printk("%s: can't allocate TSQ.\n", card->name);
1383 return -1;
1384 }
1385 memset(card->tsq.base, 0, TSQSIZE);
1386
1387 card->tsq.last = card->tsq.base + TSQ_NUM_ENTRIES - 1;
1388 card->tsq.next = card->tsq.last;
1389 for (tsqe = card->tsq.base; tsqe <= card->tsq.last; tsqe++)
1390 tsqe->word_2 = cpu_to_le32(SAR_TSQE_INVALID);
1391
1392 writel(card->tsq.paddr, SAR_REG_TSQB);
1393 writel((unsigned long) card->tsq.next - (unsigned long) card->tsq.base,
1394 SAR_REG_TSQH);
1395
1396 return 0;
1397 }
1398
1399 static void
1400 deinit_tsq(struct idt77252_dev *card)
1401 {
1402 dma_free_coherent(&card->pcidev->dev, TSQSIZE,
1403 card->tsq.base, card->tsq.paddr);
1404 }
1405
1406 static void
1407 idt77252_tx(struct idt77252_dev *card)
1408 {
1409 struct tsq_entry *tsqe;
1410 unsigned int vpi, vci;
1411 struct vc_map *vc;
1412 u32 conn, stat;
1413
1414 if (card->tsq.next == card->tsq.last)
1415 tsqe = card->tsq.base;
1416 else
1417 tsqe = card->tsq.next + 1;
1418
1419 TXPRINTK("idt77252_tx: tsq %p: base %p, next %p, last %p\n", tsqe,
1420 card->tsq.base, card->tsq.next, card->tsq.last);
1421 TXPRINTK("idt77252_tx: tsqb %08x, tsqt %08x, tsqh %08x, \n",
1422 readl(SAR_REG_TSQB),
1423 readl(SAR_REG_TSQT),
1424 readl(SAR_REG_TSQH));
1425
1426 stat = le32_to_cpu(tsqe->word_2);
1427
1428 if (stat & SAR_TSQE_INVALID)
1429 return;
1430
1431 do {
1432 TXPRINTK("tsqe: 0x%p [0x%08x 0x%08x]\n", tsqe,
1433 le32_to_cpu(tsqe->word_1),
1434 le32_to_cpu(tsqe->word_2));
1435
1436 switch (stat & SAR_TSQE_TYPE) {
1437 case SAR_TSQE_TYPE_TIMER:
1438 TXPRINTK("%s: Timer RollOver detected.\n", card->name);
1439 break;
1440
1441 case SAR_TSQE_TYPE_IDLE:
1442
1443 conn = le32_to_cpu(tsqe->word_1);
1444
1445 if (SAR_TSQE_TAG(stat) == 0x10) {
1446 #ifdef NOTDEF
1447 printk("%s: Connection %d halted.\n",
1448 card->name,
1449 le32_to_cpu(tsqe->word_1) & 0x1fff);
1450 #endif
1451 break;
1452 }
1453
1454 vc = card->vcs[conn & 0x1fff];
1455 if (!vc) {
1456 printk("%s: could not find VC from conn %d\n",
1457 card->name, conn & 0x1fff);
1458 break;
1459 }
1460
1461 printk("%s: Connection %d IDLE.\n",
1462 card->name, vc->index);
1463
1464 set_bit(VCF_IDLE, &vc->flags);
1465 break;
1466
1467 case SAR_TSQE_TYPE_TSR:
1468
1469 conn = le32_to_cpu(tsqe->word_1);
1470
1471 vc = card->vcs[conn & 0x1fff];
1472 if (!vc) {
1473 printk("%s: no VC at index %d\n",
1474 card->name,
1475 le32_to_cpu(tsqe->word_1) & 0x1fff);
1476 break;
1477 }
1478
1479 drain_scq(card, vc);
1480 break;
1481
1482 case SAR_TSQE_TYPE_TBD_COMP:
1483
1484 conn = le32_to_cpu(tsqe->word_1);
1485
1486 vpi = (conn >> SAR_TBD_VPI_SHIFT) & 0x00ff;
1487 vci = (conn >> SAR_TBD_VCI_SHIFT) & 0xffff;
1488
1489 if (vpi >= (1 << card->vpibits) ||
1490 vci >= (1 << card->vcibits)) {
1491 printk("%s: TBD complete: "
1492 "out of range VPI.VCI %u.%u\n",
1493 card->name, vpi, vci);
1494 break;
1495 }
1496
1497 vc = card->vcs[VPCI2VC(card, vpi, vci)];
1498 if (!vc) {
1499 printk("%s: TBD complete: "
1500 "no VC at VPI.VCI %u.%u\n",
1501 card->name, vpi, vci);
1502 break;
1503 }
1504
1505 drain_scq(card, vc);
1506 break;
1507 }
1508
1509 tsqe->word_2 = cpu_to_le32(SAR_TSQE_INVALID);
1510
1511 card->tsq.next = tsqe;
1512 if (card->tsq.next == card->tsq.last)
1513 tsqe = card->tsq.base;
1514 else
1515 tsqe = card->tsq.next + 1;
1516
1517 TXPRINTK("tsqe: %p: base %p, next %p, last %p\n", tsqe,
1518 card->tsq.base, card->tsq.next, card->tsq.last);
1519
1520 stat = le32_to_cpu(tsqe->word_2);
1521
1522 } while (!(stat & SAR_TSQE_INVALID));
1523
1524 writel((unsigned long)card->tsq.next - (unsigned long)card->tsq.base,
1525 SAR_REG_TSQH);
1526
1527 XPRINTK("idt77252_tx-after writel%d: TSQ head = 0x%x, tail = 0x%x, next = 0x%p.\n",
1528 card->index, readl(SAR_REG_TSQH),
1529 readl(SAR_REG_TSQT), card->tsq.next);
1530 }
1531
1532
1533 static void
1534 tst_timer(unsigned long data)
1535 {
1536 struct idt77252_dev *card = (struct idt77252_dev *)data;
1537 unsigned long base, idle, jump;
1538 unsigned long flags;
1539 u32 pc;
1540 int e;
1541
1542 spin_lock_irqsave(&card->tst_lock, flags);
1543
1544 base = card->tst[card->tst_index];
1545 idle = card->tst[card->tst_index ^ 1];
1546
1547 if (test_bit(TST_SWITCH_WAIT, &card->tst_state)) {
1548 jump = base + card->tst_size - 2;
1549
1550 pc = readl(SAR_REG_NOW) >> 2;
1551 if ((pc ^ idle) & ~(card->tst_size - 1)) {
1552 mod_timer(&card->tst_timer, jiffies + 1);
1553 goto out;
1554 }
1555
1556 clear_bit(TST_SWITCH_WAIT, &card->tst_state);
1557
1558 card->tst_index ^= 1;
1559 write_sram(card, jump, TSTE_OPC_JMP | (base << 2));
1560
1561 base = card->tst[card->tst_index];
1562 idle = card->tst[card->tst_index ^ 1];
1563
1564 for (e = 0; e < card->tst_size - 2; e++) {
1565 if (card->soft_tst[e].tste & TSTE_PUSH_IDLE) {
1566 write_sram(card, idle + e,
1567 card->soft_tst[e].tste & TSTE_MASK);
1568 card->soft_tst[e].tste &= ~(TSTE_PUSH_IDLE);
1569 }
1570 }
1571 }
1572
1573 if (test_and_clear_bit(TST_SWITCH_PENDING, &card->tst_state)) {
1574
1575 for (e = 0; e < card->tst_size - 2; e++) {
1576 if (card->soft_tst[e].tste & TSTE_PUSH_ACTIVE) {
1577 write_sram(card, idle + e,
1578 card->soft_tst[e].tste & TSTE_MASK);
1579 card->soft_tst[e].tste &= ~(TSTE_PUSH_ACTIVE);
1580 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1581 }
1582 }
1583
1584 jump = base + card->tst_size - 2;
1585
1586 write_sram(card, jump, TSTE_OPC_NULL);
1587 set_bit(TST_SWITCH_WAIT, &card->tst_state);
1588
1589 mod_timer(&card->tst_timer, jiffies + 1);
1590 }
1591
1592 out:
1593 spin_unlock_irqrestore(&card->tst_lock, flags);
1594 }
1595
1596 static int
1597 __fill_tst(struct idt77252_dev *card, struct vc_map *vc,
1598 int n, unsigned int opc)
1599 {
1600 unsigned long cl, avail;
1601 unsigned long idle;
1602 int e, r;
1603 u32 data;
1604
1605 avail = card->tst_size - 2;
1606 for (e = 0; e < avail; e++) {
1607 if (card->soft_tst[e].vc == NULL)
1608 break;
1609 }
1610 if (e >= avail) {
1611 printk("%s: No free TST entries found\n", card->name);
1612 return -1;
1613 }
1614
1615 NPRINTK("%s: conn %d: first TST entry at %d.\n",
1616 card->name, vc ? vc->index : -1, e);
1617
1618 r = n;
1619 cl = avail;
1620 data = opc & TSTE_OPC_MASK;
1621 if (vc && (opc != TSTE_OPC_NULL))
1622 data = opc | vc->index;
1623
1624 idle = card->tst[card->tst_index ^ 1];
1625
1626 /*
1627 * Fill Soft TST.
1628 */
1629 while (r > 0) {
1630 if ((cl >= avail) && (card->soft_tst[e].vc == NULL)) {
1631 if (vc)
1632 card->soft_tst[e].vc = vc;
1633 else
1634 card->soft_tst[e].vc = (void *)-1;
1635
1636 card->soft_tst[e].tste = data;
1637 if (timer_pending(&card->tst_timer))
1638 card->soft_tst[e].tste |= TSTE_PUSH_ACTIVE;
1639 else {
1640 write_sram(card, idle + e, data);
1641 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1642 }
1643
1644 cl -= card->tst_size;
1645 r--;
1646 }
1647
1648 if (++e == avail)
1649 e = 0;
1650 cl += n;
1651 }
1652
1653 return 0;
1654 }
1655
1656 static int
1657 fill_tst(struct idt77252_dev *card, struct vc_map *vc, int n, unsigned int opc)
1658 {
1659 unsigned long flags;
1660 int res;
1661
1662 spin_lock_irqsave(&card->tst_lock, flags);
1663
1664 res = __fill_tst(card, vc, n, opc);
1665
1666 set_bit(TST_SWITCH_PENDING, &card->tst_state);
1667 if (!timer_pending(&card->tst_timer))
1668 mod_timer(&card->tst_timer, jiffies + 1);
1669
1670 spin_unlock_irqrestore(&card->tst_lock, flags);
1671 return res;
1672 }
1673
1674 static int
1675 __clear_tst(struct idt77252_dev *card, struct vc_map *vc)
1676 {
1677 unsigned long idle;
1678 int e;
1679
1680 idle = card->tst[card->tst_index ^ 1];
1681
1682 for (e = 0; e < card->tst_size - 2; e++) {
1683 if (card->soft_tst[e].vc == vc) {
1684 card->soft_tst[e].vc = NULL;
1685
1686 card->soft_tst[e].tste = TSTE_OPC_VAR;
1687 if (timer_pending(&card->tst_timer))
1688 card->soft_tst[e].tste |= TSTE_PUSH_ACTIVE;
1689 else {
1690 write_sram(card, idle + e, TSTE_OPC_VAR);
1691 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1692 }
1693 }
1694 }
1695
1696 return 0;
1697 }
1698
1699 static int
1700 clear_tst(struct idt77252_dev *card, struct vc_map *vc)
1701 {
1702 unsigned long flags;
1703 int res;
1704
1705 spin_lock_irqsave(&card->tst_lock, flags);
1706
1707 res = __clear_tst(card, vc);
1708
1709 set_bit(TST_SWITCH_PENDING, &card->tst_state);
1710 if (!timer_pending(&card->tst_timer))
1711 mod_timer(&card->tst_timer, jiffies + 1);
1712
1713 spin_unlock_irqrestore(&card->tst_lock, flags);
1714 return res;
1715 }
1716
1717 static int
1718 change_tst(struct idt77252_dev *card, struct vc_map *vc,
1719 int n, unsigned int opc)
1720 {
1721 unsigned long flags;
1722 int res;
1723
1724 spin_lock_irqsave(&card->tst_lock, flags);
1725
1726 __clear_tst(card, vc);
1727 res = __fill_tst(card, vc, n, opc);
1728
1729 set_bit(TST_SWITCH_PENDING, &card->tst_state);
1730 if (!timer_pending(&card->tst_timer))
1731 mod_timer(&card->tst_timer, jiffies + 1);
1732
1733 spin_unlock_irqrestore(&card->tst_lock, flags);
1734 return res;
1735 }
1736
1737
1738 static int
1739 set_tct(struct idt77252_dev *card, struct vc_map *vc)
1740 {
1741 unsigned long tct;
1742
1743 tct = (unsigned long) (card->tct_base + vc->index * SAR_SRAM_TCT_SIZE);
1744
1745 switch (vc->class) {
1746 case SCHED_CBR:
1747 OPRINTK("%s: writing TCT at 0x%lx, SCD 0x%lx.\n",
1748 card->name, tct, vc->scq->scd);
1749
1750 write_sram(card, tct + 0, TCT_CBR | vc->scq->scd);
1751 write_sram(card, tct + 1, 0);
1752 write_sram(card, tct + 2, 0);
1753 write_sram(card, tct + 3, 0);
1754 write_sram(card, tct + 4, 0);
1755 write_sram(card, tct + 5, 0);
1756 write_sram(card, tct + 6, 0);
1757 write_sram(card, tct + 7, 0);
1758 break;
1759
1760 case SCHED_UBR:
1761 OPRINTK("%s: writing TCT at 0x%lx, SCD 0x%lx.\n",
1762 card->name, tct, vc->scq->scd);
1763
1764 write_sram(card, tct + 0, TCT_UBR | vc->scq->scd);
1765 write_sram(card, tct + 1, 0);
1766 write_sram(card, tct + 2, TCT_TSIF);
1767 write_sram(card, tct + 3, TCT_HALT | TCT_IDLE);
1768 write_sram(card, tct + 4, 0);
1769 write_sram(card, tct + 5, vc->init_er);
1770 write_sram(card, tct + 6, 0);
1771 write_sram(card, tct + 7, TCT_FLAG_UBR);
1772 break;
1773
1774 case SCHED_VBR:
1775 case SCHED_ABR:
1776 default:
1777 return -ENOSYS;
1778 }
1779
1780 return 0;
1781 }
1782
1783 /*****************************************************************************/
1784 /* */
1785 /* FBQ Handling */
1786 /* */
1787 /*****************************************************************************/
1788
1789 static __inline__ int
1790 idt77252_fbq_level(struct idt77252_dev *card, int queue)
1791 {
1792 return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) & 0x0f;
1793 }
1794
1795 static __inline__ int
1796 idt77252_fbq_full(struct idt77252_dev *card, int queue)
1797 {
1798 return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) == 0x0f;
1799 }
1800
1801 static int
1802 push_rx_skb(struct idt77252_dev *card, struct sk_buff *skb, int queue)
1803 {
1804 unsigned long flags;
1805 u32 handle;
1806 u32 addr;
1807
1808 skb->data = skb->head;
1809 skb_reset_tail_pointer(skb);
1810 skb->len = 0;
1811
1812 skb_reserve(skb, 16);
1813
1814 switch (queue) {
1815 case 0:
1816 skb_put(skb, SAR_FB_SIZE_0);
1817 break;
1818 case 1:
1819 skb_put(skb, SAR_FB_SIZE_1);
1820 break;
1821 case 2:
1822 skb_put(skb, SAR_FB_SIZE_2);
1823 break;
1824 case 3:
1825 skb_put(skb, SAR_FB_SIZE_3);
1826 break;
1827 default:
1828 return -1;
1829 }
1830
1831 if (idt77252_fbq_full(card, queue))
1832 return -1;
1833
1834 memset(&skb->data[(skb->len & ~(0x3f)) - 64], 0, 2 * sizeof(u32));
1835
1836 handle = IDT77252_PRV_POOL(skb);
1837 addr = IDT77252_PRV_PADDR(skb);
1838
1839 spin_lock_irqsave(&card->cmd_lock, flags);
1840 writel(handle, card->fbq[queue]);
1841 writel(addr, card->fbq[queue]);
1842 spin_unlock_irqrestore(&card->cmd_lock, flags);
1843
1844 return 0;
1845 }
1846
1847 static void
1848 add_rx_skb(struct idt77252_dev *card, int queue,
1849 unsigned int size, unsigned int count)
1850 {
1851 struct sk_buff *skb;
1852 dma_addr_t paddr;
1853 u32 handle;
1854
1855 while (count--) {
1856 skb = dev_alloc_skb(size);
1857 if (!skb)
1858 return;
1859
1860 if (sb_pool_add(card, skb, queue)) {
1861 printk("%s: SB POOL full\n", __func__);
1862 goto outfree;
1863 }
1864
1865 paddr = dma_map_single(&card->pcidev->dev, skb->data,
1866 skb_end_pointer(skb) - skb->data,
1867 DMA_FROM_DEVICE);
1868 IDT77252_PRV_PADDR(skb) = paddr;
1869
1870 if (push_rx_skb(card, skb, queue)) {
1871 printk("%s: FB QUEUE full\n", __func__);
1872 goto outunmap;
1873 }
1874 }
1875
1876 return;
1877
1878 outunmap:
1879 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
1880 skb_end_pointer(skb) - skb->data, DMA_FROM_DEVICE);
1881
1882 handle = IDT77252_PRV_POOL(skb);
1883 card->sbpool[POOL_QUEUE(handle)].skb[POOL_INDEX(handle)] = NULL;
1884
1885 outfree:
1886 dev_kfree_skb(skb);
1887 }
1888
1889
1890 static void
1891 recycle_rx_skb(struct idt77252_dev *card, struct sk_buff *skb)
1892 {
1893 u32 handle = IDT77252_PRV_POOL(skb);
1894 int err;
1895
1896 dma_sync_single_for_device(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
1897 skb_end_pointer(skb) - skb->data,
1898 DMA_FROM_DEVICE);
1899
1900 err = push_rx_skb(card, skb, POOL_QUEUE(handle));
1901 if (err) {
1902 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
1903 skb_end_pointer(skb) - skb->data,
1904 DMA_FROM_DEVICE);
1905 sb_pool_remove(card, skb);
1906 dev_kfree_skb(skb);
1907 }
1908 }
1909
1910 static void
1911 flush_rx_pool(struct idt77252_dev *card, struct rx_pool *rpp)
1912 {
1913 skb_queue_head_init(&rpp->queue);
1914 rpp->len = 0;
1915 }
1916
1917 static void
1918 recycle_rx_pool_skb(struct idt77252_dev *card, struct rx_pool *rpp)
1919 {
1920 struct sk_buff *skb, *tmp;
1921
1922 skb_queue_walk_safe(&rpp->queue, skb, tmp)
1923 recycle_rx_skb(card, skb);
1924
1925 flush_rx_pool(card, rpp);
1926 }
1927
1928 /*****************************************************************************/
1929 /* */
1930 /* ATM Interface */
1931 /* */
1932 /*****************************************************************************/
1933
1934 static void
1935 idt77252_phy_put(struct atm_dev *dev, unsigned char value, unsigned long addr)
1936 {
1937 write_utility(dev->dev_data, 0x100 + (addr & 0x1ff), value);
1938 }
1939
1940 static unsigned char
1941 idt77252_phy_get(struct atm_dev *dev, unsigned long addr)
1942 {
1943 return read_utility(dev->dev_data, 0x100 + (addr & 0x1ff));
1944 }
1945
1946 static inline int
1947 idt77252_send_skb(struct atm_vcc *vcc, struct sk_buff *skb, int oam)
1948 {
1949 struct atm_dev *dev = vcc->dev;
1950 struct idt77252_dev *card = dev->dev_data;
1951 struct vc_map *vc = vcc->dev_data;
1952 int err;
1953
1954 if (vc == NULL) {
1955 printk("%s: NULL connection in send().\n", card->name);
1956 atomic_inc(&vcc->stats->tx_err);
1957 dev_kfree_skb(skb);
1958 return -EINVAL;
1959 }
1960 if (!test_bit(VCF_TX, &vc->flags)) {
1961 printk("%s: Trying to transmit on a non-tx VC.\n", card->name);
1962 atomic_inc(&vcc->stats->tx_err);
1963 dev_kfree_skb(skb);
1964 return -EINVAL;
1965 }
1966
1967 switch (vcc->qos.aal) {
1968 case ATM_AAL0:
1969 case ATM_AAL1:
1970 case ATM_AAL5:
1971 break;
1972 default:
1973 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal);
1974 atomic_inc(&vcc->stats->tx_err);
1975 dev_kfree_skb(skb);
1976 return -EINVAL;
1977 }
1978
1979 if (skb_shinfo(skb)->nr_frags != 0) {
1980 printk("%s: No scatter-gather yet.\n", card->name);
1981 atomic_inc(&vcc->stats->tx_err);
1982 dev_kfree_skb(skb);
1983 return -EINVAL;
1984 }
1985 ATM_SKB(skb)->vcc = vcc;
1986
1987 err = queue_skb(card, vc, skb, oam);
1988 if (err) {
1989 atomic_inc(&vcc->stats->tx_err);
1990 dev_kfree_skb(skb);
1991 return err;
1992 }
1993
1994 return 0;
1995 }
1996
1997 static int idt77252_send(struct atm_vcc *vcc, struct sk_buff *skb)
1998 {
1999 return idt77252_send_skb(vcc, skb, 0);
2000 }
2001
2002 static int
2003 idt77252_send_oam(struct atm_vcc *vcc, void *cell, int flags)
2004 {
2005 struct atm_dev *dev = vcc->dev;
2006 struct idt77252_dev *card = dev->dev_data;
2007 struct sk_buff *skb;
2008
2009 skb = dev_alloc_skb(64);
2010 if (!skb) {
2011 printk("%s: Out of memory in send_oam().\n", card->name);
2012 atomic_inc(&vcc->stats->tx_err);
2013 return -ENOMEM;
2014 }
2015 atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
2016
2017 memcpy(skb_put(skb, 52), cell, 52);
2018
2019 return idt77252_send_skb(vcc, skb, 1);
2020 }
2021
2022 static __inline__ unsigned int
2023 idt77252_fls(unsigned int x)
2024 {
2025 int r = 1;
2026
2027 if (x == 0)
2028 return 0;
2029 if (x & 0xffff0000) {
2030 x >>= 16;
2031 r += 16;
2032 }
2033 if (x & 0xff00) {
2034 x >>= 8;
2035 r += 8;
2036 }
2037 if (x & 0xf0) {
2038 x >>= 4;
2039 r += 4;
2040 }
2041 if (x & 0xc) {
2042 x >>= 2;
2043 r += 2;
2044 }
2045 if (x & 0x2)
2046 r += 1;
2047 return r;
2048 }
2049
2050 static u16
2051 idt77252_int_to_atmfp(unsigned int rate)
2052 {
2053 u16 m, e;
2054
2055 if (rate == 0)
2056 return 0;
2057 e = idt77252_fls(rate) - 1;
2058 if (e < 9)
2059 m = (rate - (1 << e)) << (9 - e);
2060 else if (e == 9)
2061 m = (rate - (1 << e));
2062 else /* e > 9 */
2063 m = (rate - (1 << e)) >> (e - 9);
2064 return 0x4000 | (e << 9) | m;
2065 }
2066
2067 static u8
2068 idt77252_rate_logindex(struct idt77252_dev *card, int pcr)
2069 {
2070 u16 afp;
2071
2072 afp = idt77252_int_to_atmfp(pcr < 0 ? -pcr : pcr);
2073 if (pcr < 0)
2074 return rate_to_log[(afp >> 5) & 0x1ff];
2075 return rate_to_log[((afp >> 5) + 1) & 0x1ff];
2076 }
2077
2078 static void
2079 idt77252_est_timer(unsigned long data)
2080 {
2081 struct vc_map *vc = (struct vc_map *)data;
2082 struct idt77252_dev *card = vc->card;
2083 struct rate_estimator *est;
2084 unsigned long flags;
2085 u32 rate, cps;
2086 u64 ncells;
2087 u8 lacr;
2088
2089 spin_lock_irqsave(&vc->lock, flags);
2090 est = vc->estimator;
2091 if (!est)
2092 goto out;
2093
2094 ncells = est->cells;
2095
2096 rate = ((u32)(ncells - est->last_cells)) << (7 - est->interval);
2097 est->last_cells = ncells;
2098 est->avcps += ((long)rate - (long)est->avcps) >> est->ewma_log;
2099 est->cps = (est->avcps + 0x1f) >> 5;
2100
2101 cps = est->cps;
2102 if (cps < (est->maxcps >> 4))
2103 cps = est->maxcps >> 4;
2104
2105 lacr = idt77252_rate_logindex(card, cps);
2106 if (lacr > vc->max_er)
2107 lacr = vc->max_er;
2108
2109 if (lacr != vc->lacr) {
2110 vc->lacr = lacr;
2111 writel(TCMDQ_LACR|(vc->lacr << 16)|vc->index, SAR_REG_TCMDQ);
2112 }
2113
2114 est->timer.expires = jiffies + ((HZ / 4) << est->interval);
2115 add_timer(&est->timer);
2116
2117 out:
2118 spin_unlock_irqrestore(&vc->lock, flags);
2119 }
2120
2121 static struct rate_estimator *
2122 idt77252_init_est(struct vc_map *vc, int pcr)
2123 {
2124 struct rate_estimator *est;
2125
2126 est = kzalloc(sizeof(struct rate_estimator), GFP_KERNEL);
2127 if (!est)
2128 return NULL;
2129 est->maxcps = pcr < 0 ? -pcr : pcr;
2130 est->cps = est->maxcps;
2131 est->avcps = est->cps << 5;
2132
2133 est->interval = 2; /* XXX: make this configurable */
2134 est->ewma_log = 2; /* XXX: make this configurable */
2135 init_timer(&est->timer);
2136 est->timer.data = (unsigned long)vc;
2137 est->timer.function = idt77252_est_timer;
2138
2139 est->timer.expires = jiffies + ((HZ / 4) << est->interval);
2140 add_timer(&est->timer);
2141
2142 return est;
2143 }
2144
2145 static int
2146 idt77252_init_cbr(struct idt77252_dev *card, struct vc_map *vc,
2147 struct atm_vcc *vcc, struct atm_qos *qos)
2148 {
2149 int tst_free, tst_used, tst_entries;
2150 unsigned long tmpl, modl;
2151 int tcr, tcra;
2152
2153 if ((qos->txtp.max_pcr == 0) &&
2154 (qos->txtp.pcr == 0) && (qos->txtp.min_pcr == 0)) {
2155 printk("%s: trying to open a CBR VC with cell rate = 0\n",
2156 card->name);
2157 return -EINVAL;
2158 }
2159
2160 tst_used = 0;
2161 tst_free = card->tst_free;
2162 if (test_bit(VCF_TX, &vc->flags))
2163 tst_used = vc->ntste;
2164 tst_free += tst_used;
2165
2166 tcr = atm_pcr_goal(&qos->txtp);
2167 tcra = tcr >= 0 ? tcr : -tcr;
2168
2169 TXPRINTK("%s: CBR target cell rate = %d\n", card->name, tcra);
2170
2171 tmpl = (unsigned long) tcra * ((unsigned long) card->tst_size - 2);
2172 modl = tmpl % (unsigned long)card->utopia_pcr;
2173
2174 tst_entries = (int) (tmpl / card->utopia_pcr);
2175 if (tcr > 0) {
2176 if (modl > 0)
2177 tst_entries++;
2178 } else if (tcr == 0) {
2179 tst_entries = tst_free - SAR_TST_RESERVED;
2180 if (tst_entries <= 0) {
2181 printk("%s: no CBR bandwidth free.\n", card->name);
2182 return -ENOSR;
2183 }
2184 }
2185
2186 if (tst_entries == 0) {
2187 printk("%s: selected CBR bandwidth < granularity.\n",
2188 card->name);
2189 return -EINVAL;
2190 }
2191
2192 if (tst_entries > (tst_free - SAR_TST_RESERVED)) {
2193 printk("%s: not enough CBR bandwidth free.\n", card->name);
2194 return -ENOSR;
2195 }
2196
2197 vc->ntste = tst_entries;
2198
2199 card->tst_free = tst_free - tst_entries;
2200 if (test_bit(VCF_TX, &vc->flags)) {
2201 if (tst_used == tst_entries)
2202 return 0;
2203
2204 OPRINTK("%s: modify %d -> %d entries in TST.\n",
2205 card->name, tst_used, tst_entries);
2206 change_tst(card, vc, tst_entries, TSTE_OPC_CBR);
2207 return 0;
2208 }
2209
2210 OPRINTK("%s: setting %d entries in TST.\n", card->name, tst_entries);
2211 fill_tst(card, vc, tst_entries, TSTE_OPC_CBR);
2212 return 0;
2213 }
2214
2215 static int
2216 idt77252_init_ubr(struct idt77252_dev *card, struct vc_map *vc,
2217 struct atm_vcc *vcc, struct atm_qos *qos)
2218 {
2219 unsigned long flags;
2220 int tcr;
2221
2222 spin_lock_irqsave(&vc->lock, flags);
2223 if (vc->estimator) {
2224 del_timer(&vc->estimator->timer);
2225 kfree(vc->estimator);
2226 vc->estimator = NULL;
2227 }
2228 spin_unlock_irqrestore(&vc->lock, flags);
2229
2230 tcr = atm_pcr_goal(&qos->txtp);
2231 if (tcr == 0)
2232 tcr = card->link_pcr;
2233
2234 vc->estimator = idt77252_init_est(vc, tcr);
2235
2236 vc->class = SCHED_UBR;
2237 vc->init_er = idt77252_rate_logindex(card, tcr);
2238 vc->lacr = vc->init_er;
2239 if (tcr < 0)
2240 vc->max_er = vc->init_er;
2241 else
2242 vc->max_er = 0xff;
2243
2244 return 0;
2245 }
2246
2247 static int
2248 idt77252_init_tx(struct idt77252_dev *card, struct vc_map *vc,
2249 struct atm_vcc *vcc, struct atm_qos *qos)
2250 {
2251 int error;
2252
2253 if (test_bit(VCF_TX, &vc->flags))
2254 return -EBUSY;
2255
2256 switch (qos->txtp.traffic_class) {
2257 case ATM_CBR:
2258 vc->class = SCHED_CBR;
2259 break;
2260
2261 case ATM_UBR:
2262 vc->class = SCHED_UBR;
2263 break;
2264
2265 case ATM_VBR:
2266 case ATM_ABR:
2267 default:
2268 return -EPROTONOSUPPORT;
2269 }
2270
2271 vc->scq = alloc_scq(card, vc->class);
2272 if (!vc->scq) {
2273 printk("%s: can't get SCQ.\n", card->name);
2274 return -ENOMEM;
2275 }
2276
2277 vc->scq->scd = get_free_scd(card, vc);
2278 if (vc->scq->scd == 0) {
2279 printk("%s: no SCD available.\n", card->name);
2280 free_scq(card, vc->scq);
2281 return -ENOMEM;
2282 }
2283
2284 fill_scd(card, vc->scq, vc->class);
2285
2286 if (set_tct(card, vc)) {
2287 printk("%s: class %d not supported.\n",
2288 card->name, qos->txtp.traffic_class);
2289
2290 card->scd2vc[vc->scd_index] = NULL;
2291 free_scq(card, vc->scq);
2292 return -EPROTONOSUPPORT;
2293 }
2294
2295 switch (vc->class) {
2296 case SCHED_CBR:
2297 error = idt77252_init_cbr(card, vc, vcc, qos);
2298 if (error) {
2299 card->scd2vc[vc->scd_index] = NULL;
2300 free_scq(card, vc->scq);
2301 return error;
2302 }
2303
2304 clear_bit(VCF_IDLE, &vc->flags);
2305 writel(TCMDQ_START | vc->index, SAR_REG_TCMDQ);
2306 break;
2307
2308 case SCHED_UBR:
2309 error = idt77252_init_ubr(card, vc, vcc, qos);
2310 if (error) {
2311 card->scd2vc[vc->scd_index] = NULL;
2312 free_scq(card, vc->scq);
2313 return error;
2314 }
2315
2316 set_bit(VCF_IDLE, &vc->flags);
2317 break;
2318 }
2319
2320 vc->tx_vcc = vcc;
2321 set_bit(VCF_TX, &vc->flags);
2322 return 0;
2323 }
2324
2325 static int
2326 idt77252_init_rx(struct idt77252_dev *card, struct vc_map *vc,
2327 struct atm_vcc *vcc, struct atm_qos *qos)
2328 {
2329 unsigned long flags;
2330 unsigned long addr;
2331 u32 rcte = 0;
2332
2333 if (test_bit(VCF_RX, &vc->flags))
2334 return -EBUSY;
2335
2336 vc->rx_vcc = vcc;
2337 set_bit(VCF_RX, &vc->flags);
2338
2339 if ((vcc->vci == 3) || (vcc->vci == 4))
2340 return 0;
2341
2342 flush_rx_pool(card, &vc->rcv.rx_pool);
2343
2344 rcte |= SAR_RCTE_CONNECTOPEN;
2345 rcte |= SAR_RCTE_RAWCELLINTEN;
2346
2347 switch (qos->aal) {
2348 case ATM_AAL0:
2349 rcte |= SAR_RCTE_RCQ;
2350 break;
2351 case ATM_AAL1:
2352 rcte |= SAR_RCTE_OAM; /* Let SAR drop Video */
2353 break;
2354 case ATM_AAL34:
2355 rcte |= SAR_RCTE_AAL34;
2356 break;
2357 case ATM_AAL5:
2358 rcte |= SAR_RCTE_AAL5;
2359 break;
2360 default:
2361 rcte |= SAR_RCTE_RCQ;
2362 break;
2363 }
2364
2365 if (qos->aal != ATM_AAL5)
2366 rcte |= SAR_RCTE_FBP_1;
2367 else if (qos->rxtp.max_sdu > SAR_FB_SIZE_2)
2368 rcte |= SAR_RCTE_FBP_3;
2369 else if (qos->rxtp.max_sdu > SAR_FB_SIZE_1)
2370 rcte |= SAR_RCTE_FBP_2;
2371 else if (qos->rxtp.max_sdu > SAR_FB_SIZE_0)
2372 rcte |= SAR_RCTE_FBP_1;
2373 else
2374 rcte |= SAR_RCTE_FBP_01;
2375
2376 addr = card->rct_base + (vc->index << 2);
2377
2378 OPRINTK("%s: writing RCT at 0x%lx\n", card->name, addr);
2379 write_sram(card, addr, rcte);
2380
2381 spin_lock_irqsave(&card->cmd_lock, flags);
2382 writel(SAR_CMD_OPEN_CONNECTION | (addr << 2), SAR_REG_CMD);
2383 waitfor_idle(card);
2384 spin_unlock_irqrestore(&card->cmd_lock, flags);
2385
2386 return 0;
2387 }
2388
2389 static int
2390 idt77252_open(struct atm_vcc *vcc)
2391 {
2392 struct atm_dev *dev = vcc->dev;
2393 struct idt77252_dev *card = dev->dev_data;
2394 struct vc_map *vc;
2395 unsigned int index;
2396 unsigned int inuse;
2397 int error;
2398 int vci = vcc->vci;
2399 short vpi = vcc->vpi;
2400
2401 if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC)
2402 return 0;
2403
2404 if (vpi >= (1 << card->vpibits)) {
2405 printk("%s: unsupported VPI: %d\n", card->name, vpi);
2406 return -EINVAL;
2407 }
2408
2409 if (vci >= (1 << card->vcibits)) {
2410 printk("%s: unsupported VCI: %d\n", card->name, vci);
2411 return -EINVAL;
2412 }
2413
2414 set_bit(ATM_VF_ADDR, &vcc->flags);
2415
2416 mutex_lock(&card->mutex);
2417
2418 OPRINTK("%s: opening vpi.vci: %d.%d\n", card->name, vpi, vci);
2419
2420 switch (vcc->qos.aal) {
2421 case ATM_AAL0:
2422 case ATM_AAL1:
2423 case ATM_AAL5:
2424 break;
2425 default:
2426 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal);
2427 mutex_unlock(&card->mutex);
2428 return -EPROTONOSUPPORT;
2429 }
2430
2431 index = VPCI2VC(card, vpi, vci);
2432 if (!card->vcs[index]) {
2433 card->vcs[index] = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2434 if (!card->vcs[index]) {
2435 printk("%s: can't alloc vc in open()\n", card->name);
2436 mutex_unlock(&card->mutex);
2437 return -ENOMEM;
2438 }
2439 card->vcs[index]->card = card;
2440 card->vcs[index]->index = index;
2441
2442 spin_lock_init(&card->vcs[index]->lock);
2443 }
2444 vc = card->vcs[index];
2445
2446 vcc->dev_data = vc;
2447
2448 IPRINTK("%s: idt77252_open: vc = %d (%d.%d) %s/%s (max RX SDU: %u)\n",
2449 card->name, vc->index, vcc->vpi, vcc->vci,
2450 vcc->qos.rxtp.traffic_class != ATM_NONE ? "rx" : "--",
2451 vcc->qos.txtp.traffic_class != ATM_NONE ? "tx" : "--",
2452 vcc->qos.rxtp.max_sdu);
2453
2454 inuse = 0;
2455 if (vcc->qos.txtp.traffic_class != ATM_NONE &&
2456 test_bit(VCF_TX, &vc->flags))
2457 inuse = 1;
2458 if (vcc->qos.rxtp.traffic_class != ATM_NONE &&
2459 test_bit(VCF_RX, &vc->flags))
2460 inuse += 2;
2461
2462 if (inuse) {
2463 printk("%s: %s vci already in use.\n", card->name,
2464 inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx");
2465 mutex_unlock(&card->mutex);
2466 return -EADDRINUSE;
2467 }
2468
2469 if (vcc->qos.txtp.traffic_class != ATM_NONE) {
2470 error = idt77252_init_tx(card, vc, vcc, &vcc->qos);
2471 if (error) {
2472 mutex_unlock(&card->mutex);
2473 return error;
2474 }
2475 }
2476
2477 if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
2478 error = idt77252_init_rx(card, vc, vcc, &vcc->qos);
2479 if (error) {
2480 mutex_unlock(&card->mutex);
2481 return error;
2482 }
2483 }
2484
2485 set_bit(ATM_VF_READY, &vcc->flags);
2486
2487 mutex_unlock(&card->mutex);
2488 return 0;
2489 }
2490
2491 static void
2492 idt77252_close(struct atm_vcc *vcc)
2493 {
2494 struct atm_dev *dev = vcc->dev;
2495 struct idt77252_dev *card = dev->dev_data;
2496 struct vc_map *vc = vcc->dev_data;
2497 unsigned long flags;
2498 unsigned long addr;
2499 unsigned long timeout;
2500
2501 mutex_lock(&card->mutex);
2502
2503 IPRINTK("%s: idt77252_close: vc = %d (%d.%d)\n",
2504 card->name, vc->index, vcc->vpi, vcc->vci);
2505
2506 clear_bit(ATM_VF_READY, &vcc->flags);
2507
2508 if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
2509
2510 spin_lock_irqsave(&vc->lock, flags);
2511 clear_bit(VCF_RX, &vc->flags);
2512 vc->rx_vcc = NULL;
2513 spin_unlock_irqrestore(&vc->lock, flags);
2514
2515 if ((vcc->vci == 3) || (vcc->vci == 4))
2516 goto done;
2517
2518 addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE;
2519
2520 spin_lock_irqsave(&card->cmd_lock, flags);
2521 writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2), SAR_REG_CMD);
2522 waitfor_idle(card);
2523 spin_unlock_irqrestore(&card->cmd_lock, flags);
2524
2525 if (skb_queue_len(&vc->rcv.rx_pool.queue) != 0) {
2526 DPRINTK("%s: closing a VC with pending rx buffers.\n",
2527 card->name);
2528
2529 recycle_rx_pool_skb(card, &vc->rcv.rx_pool);
2530 }
2531 }
2532
2533 done:
2534 if (vcc->qos.txtp.traffic_class != ATM_NONE) {
2535
2536 spin_lock_irqsave(&vc->lock, flags);
2537 clear_bit(VCF_TX, &vc->flags);
2538 clear_bit(VCF_IDLE, &vc->flags);
2539 clear_bit(VCF_RSV, &vc->flags);
2540 vc->tx_vcc = NULL;
2541
2542 if (vc->estimator) {
2543 del_timer(&vc->estimator->timer);
2544 kfree(vc->estimator);
2545 vc->estimator = NULL;
2546 }
2547 spin_unlock_irqrestore(&vc->lock, flags);
2548
2549 timeout = 5 * 1000;
2550 while (atomic_read(&vc->scq->used) > 0) {
2551 timeout = msleep_interruptible(timeout);
2552 if (!timeout) {
2553 pr_warn("%s: SCQ drain timeout: %u used\n",
2554 card->name, atomic_read(&vc->scq->used));
2555 break;
2556 }
2557 }
2558
2559 writel(TCMDQ_HALT | vc->index, SAR_REG_TCMDQ);
2560 clear_scd(card, vc->scq, vc->class);
2561
2562 if (vc->class == SCHED_CBR) {
2563 clear_tst(card, vc);
2564 card->tst_free += vc->ntste;
2565 vc->ntste = 0;
2566 }
2567
2568 card->scd2vc[vc->scd_index] = NULL;
2569 free_scq(card, vc->scq);
2570 }
2571
2572 mutex_unlock(&card->mutex);
2573 }
2574
2575 static int
2576 idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos, int flags)
2577 {
2578 struct atm_dev *dev = vcc->dev;
2579 struct idt77252_dev *card = dev->dev_data;
2580 struct vc_map *vc = vcc->dev_data;
2581 int error = 0;
2582
2583 mutex_lock(&card->mutex);
2584
2585 if (qos->txtp.traffic_class != ATM_NONE) {
2586 if (!test_bit(VCF_TX, &vc->flags)) {
2587 error = idt77252_init_tx(card, vc, vcc, qos);
2588 if (error)
2589 goto out;
2590 } else {
2591 switch (qos->txtp.traffic_class) {
2592 case ATM_CBR:
2593 error = idt77252_init_cbr(card, vc, vcc, qos);
2594 if (error)
2595 goto out;
2596 break;
2597
2598 case ATM_UBR:
2599 error = idt77252_init_ubr(card, vc, vcc, qos);
2600 if (error)
2601 goto out;
2602
2603 if (!test_bit(VCF_IDLE, &vc->flags)) {
2604 writel(TCMDQ_LACR | (vc->lacr << 16) |
2605 vc->index, SAR_REG_TCMDQ);
2606 }
2607 break;
2608
2609 case ATM_VBR:
2610 case ATM_ABR:
2611 error = -EOPNOTSUPP;
2612 goto out;
2613 }
2614 }
2615 }
2616
2617 if ((qos->rxtp.traffic_class != ATM_NONE) &&
2618 !test_bit(VCF_RX, &vc->flags)) {
2619 error = idt77252_init_rx(card, vc, vcc, qos);
2620 if (error)
2621 goto out;
2622 }
2623
2624 memcpy(&vcc->qos, qos, sizeof(struct atm_qos));
2625
2626 set_bit(ATM_VF_HASQOS, &vcc->flags);
2627
2628 out:
2629 mutex_unlock(&card->mutex);
2630 return error;
2631 }
2632
2633 static int
2634 idt77252_proc_read(struct atm_dev *dev, loff_t * pos, char *page)
2635 {
2636 struct idt77252_dev *card = dev->dev_data;
2637 int i, left;
2638
2639 left = (int) *pos;
2640 if (!left--)
2641 return sprintf(page, "IDT77252 Interrupts:\n");
2642 if (!left--)
2643 return sprintf(page, "TSIF: %lu\n", card->irqstat[15]);
2644 if (!left--)
2645 return sprintf(page, "TXICP: %lu\n", card->irqstat[14]);
2646 if (!left--)
2647 return sprintf(page, "TSQF: %lu\n", card->irqstat[12]);
2648 if (!left--)
2649 return sprintf(page, "TMROF: %lu\n", card->irqstat[11]);
2650 if (!left--)
2651 return sprintf(page, "PHYI: %lu\n", card->irqstat[10]);
2652 if (!left--)
2653 return sprintf(page, "FBQ3A: %lu\n", card->irqstat[8]);
2654 if (!left--)
2655 return sprintf(page, "FBQ2A: %lu\n", card->irqstat[7]);
2656 if (!left--)
2657 return sprintf(page, "RSQF: %lu\n", card->irqstat[6]);
2658 if (!left--)
2659 return sprintf(page, "EPDU: %lu\n", card->irqstat[5]);
2660 if (!left--)
2661 return sprintf(page, "RAWCF: %lu\n", card->irqstat[4]);
2662 if (!left--)
2663 return sprintf(page, "FBQ1A: %lu\n", card->irqstat[3]);
2664 if (!left--)
2665 return sprintf(page, "FBQ0A: %lu\n", card->irqstat[2]);
2666 if (!left--)
2667 return sprintf(page, "RSQAF: %lu\n", card->irqstat[1]);
2668 if (!left--)
2669 return sprintf(page, "IDT77252 Transmit Connection Table:\n");
2670
2671 for (i = 0; i < card->tct_size; i++) {
2672 unsigned long tct;
2673 struct atm_vcc *vcc;
2674 struct vc_map *vc;
2675 char *p;
2676
2677 vc = card->vcs[i];
2678 if (!vc)
2679 continue;
2680
2681 vcc = NULL;
2682 if (vc->tx_vcc)
2683 vcc = vc->tx_vcc;
2684 if (!vcc)
2685 continue;
2686 if (left--)
2687 continue;
2688
2689 p = page;
2690 p += sprintf(p, " %4u: %u.%u: ", i, vcc->vpi, vcc->vci);
2691 tct = (unsigned long) (card->tct_base + i * SAR_SRAM_TCT_SIZE);
2692
2693 for (i = 0; i < 8; i++)
2694 p += sprintf(p, " %08x", read_sram(card, tct + i));
2695 p += sprintf(p, "\n");
2696 return p - page;
2697 }
2698 return 0;
2699 }
2700
2701 /*****************************************************************************/
2702 /* */
2703 /* Interrupt handler */
2704 /* */
2705 /*****************************************************************************/
2706
2707 static void
2708 idt77252_collect_stat(struct idt77252_dev *card)
2709 {
2710 (void) readl(SAR_REG_CDC);
2711 (void) readl(SAR_REG_VPEC);
2712 (void) readl(SAR_REG_ICC);
2713
2714 }
2715
2716 static irqreturn_t
2717 idt77252_interrupt(int irq, void *dev_id)
2718 {
2719 struct idt77252_dev *card = dev_id;
2720 u32 stat;
2721
2722 stat = readl(SAR_REG_STAT) & 0xffff;
2723 if (!stat) /* no interrupt for us */
2724 return IRQ_NONE;
2725
2726 if (test_and_set_bit(IDT77252_BIT_INTERRUPT, &card->flags)) {
2727 printk("%s: Re-entering irq_handler()\n", card->name);
2728 goto out;
2729 }
2730
2731 writel(stat, SAR_REG_STAT); /* reset interrupt */
2732
2733 if (stat & SAR_STAT_TSIF) { /* entry written to TSQ */
2734 INTPRINTK("%s: TSIF\n", card->name);
2735 card->irqstat[15]++;
2736 idt77252_tx(card);
2737 }
2738 if (stat & SAR_STAT_TXICP) { /* Incomplete CS-PDU has */
2739 INTPRINTK("%s: TXICP\n", card->name);
2740 card->irqstat[14]++;
2741 #ifdef CONFIG_ATM_IDT77252_DEBUG
2742 idt77252_tx_dump(card);
2743 #endif
2744 }
2745 if (stat & SAR_STAT_TSQF) { /* TSQ 7/8 full */
2746 INTPRINTK("%s: TSQF\n", card->name);
2747 card->irqstat[12]++;
2748 idt77252_tx(card);
2749 }
2750 if (stat & SAR_STAT_TMROF) { /* Timer overflow */
2751 INTPRINTK("%s: TMROF\n", card->name);
2752 card->irqstat[11]++;
2753 idt77252_collect_stat(card);
2754 }
2755
2756 if (stat & SAR_STAT_EPDU) { /* Got complete CS-PDU */
2757 INTPRINTK("%s: EPDU\n", card->name);
2758 card->irqstat[5]++;
2759 idt77252_rx(card);
2760 }
2761 if (stat & SAR_STAT_RSQAF) { /* RSQ is 7/8 full */
2762 INTPRINTK("%s: RSQAF\n", card->name);
2763 card->irqstat[1]++;
2764 idt77252_rx(card);
2765 }
2766 if (stat & SAR_STAT_RSQF) { /* RSQ is full */
2767 INTPRINTK("%s: RSQF\n", card->name);
2768 card->irqstat[6]++;
2769 idt77252_rx(card);
2770 }
2771 if (stat & SAR_STAT_RAWCF) { /* Raw cell received */
2772 INTPRINTK("%s: RAWCF\n", card->name);
2773 card->irqstat[4]++;
2774 idt77252_rx_raw(card);
2775 }
2776
2777 if (stat & SAR_STAT_PHYI) { /* PHY device interrupt */
2778 INTPRINTK("%s: PHYI", card->name);
2779 card->irqstat[10]++;
2780 if (card->atmdev->phy && card->atmdev->phy->interrupt)
2781 card->atmdev->phy->interrupt(card->atmdev);
2782 }
2783
2784 if (stat & (SAR_STAT_FBQ0A | SAR_STAT_FBQ1A |
2785 SAR_STAT_FBQ2A | SAR_STAT_FBQ3A)) {
2786
2787 writel(readl(SAR_REG_CFG) & ~(SAR_CFG_FBIE), SAR_REG_CFG);
2788
2789 INTPRINTK("%s: FBQA: %04x\n", card->name, stat);
2790
2791 if (stat & SAR_STAT_FBQ0A)
2792 card->irqstat[2]++;
2793 if (stat & SAR_STAT_FBQ1A)
2794 card->irqstat[3]++;
2795 if (stat & SAR_STAT_FBQ2A)
2796 card->irqstat[7]++;
2797 if (stat & SAR_STAT_FBQ3A)
2798 card->irqstat[8]++;
2799
2800 schedule_work(&card->tqueue);
2801 }
2802
2803 out:
2804 clear_bit(IDT77252_BIT_INTERRUPT, &card->flags);
2805 return IRQ_HANDLED;
2806 }
2807
2808 static void
2809 idt77252_softint(struct work_struct *work)
2810 {
2811 struct idt77252_dev *card =
2812 container_of(work, struct idt77252_dev, tqueue);
2813 u32 stat;
2814 int done;
2815
2816 for (done = 1; ; done = 1) {
2817 stat = readl(SAR_REG_STAT) >> 16;
2818
2819 if ((stat & 0x0f) < SAR_FBQ0_HIGH) {
2820 add_rx_skb(card, 0, SAR_FB_SIZE_0, 32);
2821 done = 0;
2822 }
2823
2824 stat >>= 4;
2825 if ((stat & 0x0f) < SAR_FBQ1_HIGH) {
2826 add_rx_skb(card, 1, SAR_FB_SIZE_1, 32);
2827 done = 0;
2828 }
2829
2830 stat >>= 4;
2831 if ((stat & 0x0f) < SAR_FBQ2_HIGH) {
2832 add_rx_skb(card, 2, SAR_FB_SIZE_2, 32);
2833 done = 0;
2834 }
2835
2836 stat >>= 4;
2837 if ((stat & 0x0f) < SAR_FBQ3_HIGH) {
2838 add_rx_skb(card, 3, SAR_FB_SIZE_3, 32);
2839 done = 0;
2840 }
2841
2842 if (done)
2843 break;
2844 }
2845
2846 writel(readl(SAR_REG_CFG) | SAR_CFG_FBIE, SAR_REG_CFG);
2847 }
2848
2849
2850 static int
2851 open_card_oam(struct idt77252_dev *card)
2852 {
2853 unsigned long flags;
2854 unsigned long addr;
2855 struct vc_map *vc;
2856 int vpi, vci;
2857 int index;
2858 u32 rcte;
2859
2860 for (vpi = 0; vpi < (1 << card->vpibits); vpi++) {
2861 for (vci = 3; vci < 5; vci++) {
2862 index = VPCI2VC(card, vpi, vci);
2863
2864 vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2865 if (!vc) {
2866 printk("%s: can't alloc vc\n", card->name);
2867 return -ENOMEM;
2868 }
2869 vc->index = index;
2870 card->vcs[index] = vc;
2871
2872 flush_rx_pool(card, &vc->rcv.rx_pool);
2873
2874 rcte = SAR_RCTE_CONNECTOPEN |
2875 SAR_RCTE_RAWCELLINTEN |
2876 SAR_RCTE_RCQ |
2877 SAR_RCTE_FBP_1;
2878
2879 addr = card->rct_base + (vc->index << 2);
2880 write_sram(card, addr, rcte);
2881
2882 spin_lock_irqsave(&card->cmd_lock, flags);
2883 writel(SAR_CMD_OPEN_CONNECTION | (addr << 2),
2884 SAR_REG_CMD);
2885 waitfor_idle(card);
2886 spin_unlock_irqrestore(&card->cmd_lock, flags);
2887 }
2888 }
2889
2890 return 0;
2891 }
2892
2893 static void
2894 close_card_oam(struct idt77252_dev *card)
2895 {
2896 unsigned long flags;
2897 unsigned long addr;
2898 struct vc_map *vc;
2899 int vpi, vci;
2900 int index;
2901
2902 for (vpi = 0; vpi < (1 << card->vpibits); vpi++) {
2903 for (vci = 3; vci < 5; vci++) {
2904 index = VPCI2VC(card, vpi, vci);
2905 vc = card->vcs[index];
2906
2907 addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE;
2908
2909 spin_lock_irqsave(&card->cmd_lock, flags);
2910 writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2),
2911 SAR_REG_CMD);
2912 waitfor_idle(card);
2913 spin_unlock_irqrestore(&card->cmd_lock, flags);
2914
2915 if (skb_queue_len(&vc->rcv.rx_pool.queue) != 0) {
2916 DPRINTK("%s: closing a VC "
2917 "with pending rx buffers.\n",
2918 card->name);
2919
2920 recycle_rx_pool_skb(card, &vc->rcv.rx_pool);
2921 }
2922 }
2923 }
2924 }
2925
2926 static int
2927 open_card_ubr0(struct idt77252_dev *card)
2928 {
2929 struct vc_map *vc;
2930
2931 vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2932 if (!vc) {
2933 printk("%s: can't alloc vc\n", card->name);
2934 return -ENOMEM;
2935 }
2936 card->vcs[0] = vc;
2937 vc->class = SCHED_UBR0;
2938
2939 vc->scq = alloc_scq(card, vc->class);
2940 if (!vc->scq) {
2941 printk("%s: can't get SCQ.\n", card->name);
2942 return -ENOMEM;
2943 }
2944
2945 card->scd2vc[0] = vc;
2946 vc->scd_index = 0;
2947 vc->scq->scd = card->scd_base;
2948
2949 fill_scd(card, vc->scq, vc->class);
2950
2951 write_sram(card, card->tct_base + 0, TCT_UBR | card->scd_base);
2952 write_sram(card, card->tct_base + 1, 0);
2953 write_sram(card, card->tct_base + 2, 0);
2954 write_sram(card, card->tct_base + 3, 0);
2955 write_sram(card, card->tct_base + 4, 0);
2956 write_sram(card, card->tct_base + 5, 0);
2957 write_sram(card, card->tct_base + 6, 0);
2958 write_sram(card, card->tct_base + 7, TCT_FLAG_UBR);
2959
2960 clear_bit(VCF_IDLE, &vc->flags);
2961 writel(TCMDQ_START | 0, SAR_REG_TCMDQ);
2962 return 0;
2963 }
2964
2965 static int
2966 idt77252_dev_open(struct idt77252_dev *card)
2967 {
2968 u32 conf;
2969
2970 if (!test_bit(IDT77252_BIT_INIT, &card->flags)) {
2971 printk("%s: SAR not yet initialized.\n", card->name);
2972 return -1;
2973 }
2974
2975 conf = SAR_CFG_RXPTH| /* enable receive path */
2976 SAR_RX_DELAY | /* interrupt on complete PDU */
2977 SAR_CFG_RAWIE | /* interrupt enable on raw cells */
2978 SAR_CFG_RQFIE | /* interrupt on RSQ almost full */
2979 SAR_CFG_TMOIE | /* interrupt on timer overflow */
2980 SAR_CFG_FBIE | /* interrupt on low free buffers */
2981 SAR_CFG_TXEN | /* transmit operation enable */
2982 SAR_CFG_TXINT | /* interrupt on transmit status */
2983 SAR_CFG_TXUIE | /* interrupt on transmit underrun */
2984 SAR_CFG_TXSFI | /* interrupt on TSQ almost full */
2985 SAR_CFG_PHYIE /* enable PHY interrupts */
2986 ;
2987
2988 #ifdef CONFIG_ATM_IDT77252_RCV_ALL
2989 /* Test RAW cell receive. */
2990 conf |= SAR_CFG_VPECA;
2991 #endif
2992
2993 writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG);
2994
2995 if (open_card_oam(card)) {
2996 printk("%s: Error initializing OAM.\n", card->name);
2997 return -1;
2998 }
2999
3000 if (open_card_ubr0(card)) {
3001 printk("%s: Error initializing UBR0.\n", card->name);
3002 return -1;
3003 }
3004
3005 IPRINTK("%s: opened IDT77252 ABR SAR.\n", card->name);
3006 return 0;
3007 }
3008
3009 static void idt77252_dev_close(struct atm_dev *dev)
3010 {
3011 struct idt77252_dev *card = dev->dev_data;
3012 u32 conf;
3013
3014 close_card_oam(card);
3015
3016 conf = SAR_CFG_RXPTH | /* enable receive path */
3017 SAR_RX_DELAY | /* interrupt on complete PDU */
3018 SAR_CFG_RAWIE | /* interrupt enable on raw cells */
3019 SAR_CFG_RQFIE | /* interrupt on RSQ almost full */
3020 SAR_CFG_TMOIE | /* interrupt on timer overflow */
3021 SAR_CFG_FBIE | /* interrupt on low free buffers */
3022 SAR_CFG_TXEN | /* transmit operation enable */
3023 SAR_CFG_TXINT | /* interrupt on transmit status */
3024 SAR_CFG_TXUIE | /* interrupt on xmit underrun */
3025 SAR_CFG_TXSFI /* interrupt on TSQ almost full */
3026 ;
3027
3028 writel(readl(SAR_REG_CFG) & ~(conf), SAR_REG_CFG);
3029
3030 DIPRINTK("%s: closed IDT77252 ABR SAR.\n", card->name);
3031 }
3032
3033
3034 /*****************************************************************************/
3035 /* */
3036 /* Initialisation and Deinitialization of IDT77252 */
3037 /* */
3038 /*****************************************************************************/
3039
3040
3041 static void
3042 deinit_card(struct idt77252_dev *card)
3043 {
3044 struct sk_buff *skb;
3045 int i, j;
3046
3047 if (!test_bit(IDT77252_BIT_INIT, &card->flags)) {
3048 printk("%s: SAR not yet initialized.\n", card->name);
3049 return;
3050 }
3051 DIPRINTK("idt77252: deinitialize card %u\n", card->index);
3052
3053 writel(0, SAR_REG_CFG);
3054
3055 if (card->atmdev)
3056 atm_dev_deregister(card->atmdev);
3057
3058 for (i = 0; i < 4; i++) {
3059 for (j = 0; j < FBQ_SIZE; j++) {
3060 skb = card->sbpool[i].skb[j];
3061 if (skb) {
3062 dma_unmap_single(&card->pcidev->dev,
3063 IDT77252_PRV_PADDR(skb),
3064 (skb_end_pointer(skb) -
3065 skb->data),
3066 DMA_FROM_DEVICE);
3067 card->sbpool[i].skb[j] = NULL;
3068 dev_kfree_skb(skb);
3069 }
3070 }
3071 }
3072
3073 vfree(card->soft_tst);
3074
3075 vfree(card->scd2vc);
3076
3077 vfree(card->vcs);
3078
3079 if (card->raw_cell_hnd) {
3080 dma_free_coherent(&card->pcidev->dev, 2 * sizeof(u32),
3081 card->raw_cell_hnd, card->raw_cell_paddr);
3082 }
3083
3084 if (card->rsq.base) {
3085 DIPRINTK("%s: Release RSQ ...\n", card->name);
3086 deinit_rsq(card);
3087 }
3088
3089 if (card->tsq.base) {
3090 DIPRINTK("%s: Release TSQ ...\n", card->name);
3091 deinit_tsq(card);
3092 }
3093
3094 DIPRINTK("idt77252: Release IRQ.\n");
3095 free_irq(card->pcidev->irq, card);
3096
3097 for (i = 0; i < 4; i++) {
3098 if (card->fbq[i])
3099 iounmap(card->fbq[i]);
3100 }
3101
3102 if (card->membase)
3103 iounmap(card->membase);
3104
3105 clear_bit(IDT77252_BIT_INIT, &card->flags);
3106 DIPRINTK("%s: Card deinitialized.\n", card->name);
3107 }
3108
3109
3110 static void init_sram(struct idt77252_dev *card)
3111 {
3112 int i;
3113
3114 for (i = 0; i < card->sramsize; i += 4)
3115 write_sram(card, (i >> 2), 0);
3116
3117 /* set SRAM layout for THIS card */
3118 if (card->sramsize == (512 * 1024)) {
3119 card->tct_base = SAR_SRAM_TCT_128_BASE;
3120 card->tct_size = (SAR_SRAM_TCT_128_TOP - card->tct_base + 1)
3121 / SAR_SRAM_TCT_SIZE;
3122 card->rct_base = SAR_SRAM_RCT_128_BASE;
3123 card->rct_size = (SAR_SRAM_RCT_128_TOP - card->rct_base + 1)
3124 / SAR_SRAM_RCT_SIZE;
3125 card->rt_base = SAR_SRAM_RT_128_BASE;
3126 card->scd_base = SAR_SRAM_SCD_128_BASE;
3127 card->scd_size = (SAR_SRAM_SCD_128_TOP - card->scd_base + 1)
3128 / SAR_SRAM_SCD_SIZE;
3129 card->tst[0] = SAR_SRAM_TST1_128_BASE;
3130 card->tst[1] = SAR_SRAM_TST2_128_BASE;
3131 card->tst_size = SAR_SRAM_TST1_128_TOP - card->tst[0] + 1;
3132 card->abrst_base = SAR_SRAM_ABRSTD_128_BASE;
3133 card->abrst_size = SAR_ABRSTD_SIZE_8K;
3134 card->fifo_base = SAR_SRAM_FIFO_128_BASE;
3135 card->fifo_size = SAR_RXFD_SIZE_32K;
3136 } else {
3137 card->tct_base = SAR_SRAM_TCT_32_BASE;
3138 card->tct_size = (SAR_SRAM_TCT_32_TOP - card->tct_base + 1)
3139 / SAR_SRAM_TCT_SIZE;
3140 card->rct_base = SAR_SRAM_RCT_32_BASE;
3141 card->rct_size = (SAR_SRAM_RCT_32_TOP - card->rct_base + 1)
3142 / SAR_SRAM_RCT_SIZE;
3143 card->rt_base = SAR_SRAM_RT_32_BASE;
3144 card->scd_base = SAR_SRAM_SCD_32_BASE;
3145 card->scd_size = (SAR_SRAM_SCD_32_TOP - card->scd_base + 1)
3146 / SAR_SRAM_SCD_SIZE;
3147 card->tst[0] = SAR_SRAM_TST1_32_BASE;
3148 card->tst[1] = SAR_SRAM_TST2_32_BASE;
3149 card->tst_size = (SAR_SRAM_TST1_32_TOP - card->tst[0] + 1);
3150 card->abrst_base = SAR_SRAM_ABRSTD_32_BASE;
3151 card->abrst_size = SAR_ABRSTD_SIZE_1K;
3152 card->fifo_base = SAR_SRAM_FIFO_32_BASE;
3153 card->fifo_size = SAR_RXFD_SIZE_4K;
3154 }
3155
3156 /* Initialize TCT */
3157 for (i = 0; i < card->tct_size; i++) {
3158 write_sram(card, i * SAR_SRAM_TCT_SIZE + 0, 0);
3159 write_sram(card, i * SAR_SRAM_TCT_SIZE + 1, 0);
3160 write_sram(card, i * SAR_SRAM_TCT_SIZE + 2, 0);
3161 write_sram(card, i * SAR_SRAM_TCT_SIZE + 3, 0);
3162 write_sram(card, i * SAR_SRAM_TCT_SIZE + 4, 0);
3163 write_sram(card, i * SAR_SRAM_TCT_SIZE + 5, 0);
3164 write_sram(card, i * SAR_SRAM_TCT_SIZE + 6, 0);
3165 write_sram(card, i * SAR_SRAM_TCT_SIZE + 7, 0);
3166 }
3167
3168 /* Initialize RCT */
3169 for (i = 0; i < card->rct_size; i++) {
3170 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE,
3171 (u32) SAR_RCTE_RAWCELLINTEN);
3172 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 1,
3173 (u32) 0);
3174 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 2,
3175 (u32) 0);
3176 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 3,
3177 (u32) 0xffffffff);
3178 }
3179
3180 writel((SAR_FBQ0_LOW << 28) | 0x00000000 | 0x00000000 |
3181 (SAR_FB_SIZE_0 / 48), SAR_REG_FBQS0);
3182 writel((SAR_FBQ1_LOW << 28) | 0x00000000 | 0x00000000 |
3183 (SAR_FB_SIZE_1 / 48), SAR_REG_FBQS1);
3184 writel((SAR_FBQ2_LOW << 28) | 0x00000000 | 0x00000000 |
3185 (SAR_FB_SIZE_2 / 48), SAR_REG_FBQS2);
3186 writel((SAR_FBQ3_LOW << 28) | 0x00000000 | 0x00000000 |
3187 (SAR_FB_SIZE_3 / 48), SAR_REG_FBQS3);
3188
3189 /* Initialize rate table */
3190 for (i = 0; i < 256; i++) {
3191 write_sram(card, card->rt_base + i, log_to_rate[i]);
3192 }
3193
3194 for (i = 0; i < 128; i++) {
3195 unsigned int tmp;
3196
3197 tmp = rate_to_log[(i << 2) + 0] << 0;
3198 tmp |= rate_to_log[(i << 2) + 1] << 8;
3199 tmp |= rate_to_log[(i << 2) + 2] << 16;
3200 tmp |= rate_to_log[(i << 2) + 3] << 24;
3201 write_sram(card, card->rt_base + 256 + i, tmp);
3202 }
3203
3204 #if 0 /* Fill RDF and AIR tables. */
3205 for (i = 0; i < 128; i++) {
3206 unsigned int tmp;
3207
3208 tmp = RDF[0][(i << 1) + 0] << 16;
3209 tmp |= RDF[0][(i << 1) + 1] << 0;
3210 write_sram(card, card->rt_base + 512 + i, tmp);
3211 }
3212
3213 for (i = 0; i < 128; i++) {
3214 unsigned int tmp;
3215
3216 tmp = AIR[0][(i << 1) + 0] << 16;
3217 tmp |= AIR[0][(i << 1) + 1] << 0;
3218 write_sram(card, card->rt_base + 640 + i, tmp);
3219 }
3220 #endif
3221
3222 IPRINTK("%s: initialize rate table ...\n", card->name);
3223 writel(card->rt_base << 2, SAR_REG_RTBL);
3224
3225 /* Initialize TSTs */
3226 IPRINTK("%s: initialize TST ...\n", card->name);
3227 card->tst_free = card->tst_size - 2; /* last two are jumps */
3228
3229 for (i = card->tst[0]; i < card->tst[0] + card->tst_size - 2; i++)
3230 write_sram(card, i, TSTE_OPC_VAR);
3231 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2));
3232 idt77252_sram_write_errors = 1;
3233 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2));
3234 idt77252_sram_write_errors = 0;
3235 for (i = card->tst[1]; i < card->tst[1] + card->tst_size - 2; i++)
3236 write_sram(card, i, TSTE_OPC_VAR);
3237 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2));
3238 idt77252_sram_write_errors = 1;
3239 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2));
3240 idt77252_sram_write_errors = 0;
3241
3242 card->tst_index = 0;
3243 writel(card->tst[0] << 2, SAR_REG_TSTB);
3244
3245 /* Initialize ABRSTD and Receive FIFO */
3246 IPRINTK("%s: initialize ABRSTD ...\n", card->name);
3247 writel(card->abrst_size | (card->abrst_base << 2),
3248 SAR_REG_ABRSTD);
3249
3250 IPRINTK("%s: initialize receive fifo ...\n", card->name);
3251 writel(card->fifo_size | (card->fifo_base << 2),
3252 SAR_REG_RXFD);
3253
3254 IPRINTK("%s: SRAM initialization complete.\n", card->name);
3255 }
3256
3257 static int init_card(struct atm_dev *dev)
3258 {
3259 struct idt77252_dev *card = dev->dev_data;
3260 struct pci_dev *pcidev = card->pcidev;
3261 unsigned long tmpl, modl;
3262 unsigned int linkrate, rsvdcr;
3263 unsigned int tst_entries;
3264 struct net_device *tmp;
3265 char tname[10];
3266
3267 u32 size;
3268 u_char pci_byte;
3269 u32 conf;
3270 int i, k;
3271
3272 if (test_bit(IDT77252_BIT_INIT, &card->flags)) {
3273 printk("Error: SAR already initialized.\n");
3274 return -1;
3275 }
3276
3277 /*****************************************************************/
3278 /* P C I C O N F I G U R A T I O N */
3279 /*****************************************************************/
3280
3281 /* Set PCI Retry-Timeout and TRDY timeout */
3282 IPRINTK("%s: Checking PCI retries.\n", card->name);
3283 if (pci_read_config_byte(pcidev, 0x40, &pci_byte) != 0) {
3284 printk("%s: can't read PCI retry timeout.\n", card->name);
3285 deinit_card(card);
3286 return -1;
3287 }
3288 if (pci_byte != 0) {
3289 IPRINTK("%s: PCI retry timeout: %d, set to 0.\n",
3290 card->name, pci_byte);
3291 if (pci_write_config_byte(pcidev, 0x40, 0) != 0) {
3292 printk("%s: can't set PCI retry timeout.\n",
3293 card->name);
3294 deinit_card(card);
3295 return -1;
3296 }
3297 }
3298 IPRINTK("%s: Checking PCI TRDY.\n", card->name);
3299 if (pci_read_config_byte(pcidev, 0x41, &pci_byte) != 0) {
3300 printk("%s: can't read PCI TRDY timeout.\n", card->name);
3301 deinit_card(card);
3302 return -1;
3303 }
3304 if (pci_byte != 0) {
3305 IPRINTK("%s: PCI TRDY timeout: %d, set to 0.\n",
3306 card->name, pci_byte);
3307 if (pci_write_config_byte(pcidev, 0x41, 0) != 0) {
3308 printk("%s: can't set PCI TRDY timeout.\n", card->name);
3309 deinit_card(card);
3310 return -1;
3311 }
3312 }
3313 /* Reset Timer register */
3314 if (readl(SAR_REG_STAT) & SAR_STAT_TMROF) {
3315 printk("%s: resetting timer overflow.\n", card->name);
3316 writel(SAR_STAT_TMROF, SAR_REG_STAT);
3317 }
3318 IPRINTK("%s: Request IRQ ... ", card->name);
3319 if (request_irq(pcidev->irq, idt77252_interrupt, IRQF_SHARED,
3320 card->name, card) != 0) {
3321 printk("%s: can't allocate IRQ.\n", card->name);
3322 deinit_card(card);
3323 return -1;
3324 }
3325 IPRINTK("got %d.\n", pcidev->irq);
3326
3327 /*****************************************************************/
3328 /* C H E C K A N D I N I T S R A M */
3329 /*****************************************************************/
3330
3331 IPRINTK("%s: Initializing SRAM\n", card->name);
3332
3333 /* preset size of connecton table, so that init_sram() knows about it */
3334 conf = SAR_CFG_TX_FIFO_SIZE_9 | /* Use maximum fifo size */
3335 SAR_CFG_RXSTQ_SIZE_8k | /* Receive Status Queue is 8k */
3336 SAR_CFG_IDLE_CLP | /* Set CLP on idle cells */
3337 #ifndef ATM_IDT77252_SEND_IDLE
3338 SAR_CFG_NO_IDLE | /* Do not send idle cells */
3339 #endif
3340 0;
3341
3342 if (card->sramsize == (512 * 1024))
3343 conf |= SAR_CFG_CNTBL_1k;
3344 else
3345 conf |= SAR_CFG_CNTBL_512;
3346
3347 switch (vpibits) {
3348 case 0:
3349 conf |= SAR_CFG_VPVCS_0;
3350 break;
3351 default:
3352 case 1:
3353 conf |= SAR_CFG_VPVCS_1;
3354 break;
3355 case 2:
3356 conf |= SAR_CFG_VPVCS_2;
3357 break;
3358 case 8:
3359 conf |= SAR_CFG_VPVCS_8;
3360 break;
3361 }
3362
3363 writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG);
3364
3365 init_sram(card);
3366
3367 /********************************************************************/
3368 /* 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 */
3369 /********************************************************************/
3370 /* Initialize TSQ */
3371 if (0 != init_tsq(card)) {
3372 deinit_card(card);
3373 return -1;
3374 }
3375 /* Initialize RSQ */
3376 if (0 != init_rsq(card)) {
3377 deinit_card(card);
3378 return -1;
3379 }
3380
3381 card->vpibits = vpibits;
3382 if (card->sramsize == (512 * 1024)) {
3383 card->vcibits = 10 - card->vpibits;
3384 } else {
3385 card->vcibits = 9 - card->vpibits;
3386 }
3387
3388 card->vcimask = 0;
3389 for (k = 0, i = 1; k < card->vcibits; k++) {
3390 card->vcimask |= i;
3391 i <<= 1;
3392 }
3393
3394 IPRINTK("%s: Setting VPI/VCI mask to zero.\n", card->name);
3395 writel(0, SAR_REG_VPM);
3396
3397 /* Little Endian Order */
3398 writel(0, SAR_REG_GP);
3399
3400 /* Initialize RAW Cell Handle Register */
3401 card->raw_cell_hnd = dma_zalloc_coherent(&card->pcidev->dev,
3402 2 * sizeof(u32),
3403 &card->raw_cell_paddr,
3404 GFP_KERNEL);
3405 if (!card->raw_cell_hnd) {
3406 printk("%s: memory allocation failure.\n", card->name);
3407 deinit_card(card);
3408 return -1;
3409 }
3410 writel(card->raw_cell_paddr, SAR_REG_RAWHND);
3411 IPRINTK("%s: raw cell handle is at 0x%p.\n", card->name,
3412 card->raw_cell_hnd);
3413
3414 size = sizeof(struct vc_map *) * card->tct_size;
3415 IPRINTK("%s: allocate %d byte for VC map.\n", card->name, size);
3416 card->vcs = vzalloc(size);
3417 if (!card->vcs) {
3418 printk("%s: memory allocation failure.\n", card->name);
3419 deinit_card(card);
3420 return -1;
3421 }
3422
3423 size = sizeof(struct vc_map *) * card->scd_size;
3424 IPRINTK("%s: allocate %d byte for SCD to VC mapping.\n",
3425 card->name, size);
3426 card->scd2vc = vzalloc(size);
3427 if (!card->scd2vc) {
3428 printk("%s: memory allocation failure.\n", card->name);
3429 deinit_card(card);
3430 return -1;
3431 }
3432
3433 size = sizeof(struct tst_info) * (card->tst_size - 2);
3434 IPRINTK("%s: allocate %d byte for TST to VC mapping.\n",
3435 card->name, size);
3436 card->soft_tst = vmalloc(size);
3437 if (!card->soft_tst) {
3438 printk("%s: memory allocation failure.\n", card->name);
3439 deinit_card(card);
3440 return -1;
3441 }
3442 for (i = 0; i < card->tst_size - 2; i++) {
3443 card->soft_tst[i].tste = TSTE_OPC_VAR;
3444 card->soft_tst[i].vc = NULL;
3445 }
3446
3447 if (dev->phy == NULL) {
3448 printk("%s: No LT device defined.\n", card->name);
3449 deinit_card(card);
3450 return -1;
3451 }
3452 if (dev->phy->ioctl == NULL) {
3453 printk("%s: LT had no IOCTL function defined.\n", card->name);
3454 deinit_card(card);
3455 return -1;
3456 }
3457
3458 #ifdef CONFIG_ATM_IDT77252_USE_SUNI
3459 /*
3460 * this is a jhs hack to get around special functionality in the
3461 * phy driver for the atecom hardware; the functionality doesn't
3462 * exist in the linux atm suni driver
3463 *
3464 * it isn't the right way to do things, but as the guy from NIST
3465 * said, talking about their measurement of the fine structure
3466 * constant, "it's good enough for government work."
3467 */
3468 linkrate = 149760000;
3469 #endif
3470
3471 card->link_pcr = (linkrate / 8 / 53);
3472 printk("%s: Linkrate on ATM line : %u bit/s, %u cell/s.\n",
3473 card->name, linkrate, card->link_pcr);
3474
3475 #ifdef ATM_IDT77252_SEND_IDLE
3476 card->utopia_pcr = card->link_pcr;
3477 #else
3478 card->utopia_pcr = (160000000 / 8 / 54);
3479 #endif
3480
3481 rsvdcr = 0;
3482 if (card->utopia_pcr > card->link_pcr)
3483 rsvdcr = card->utopia_pcr - card->link_pcr;
3484
3485 tmpl = (unsigned long) rsvdcr * ((unsigned long) card->tst_size - 2);
3486 modl = tmpl % (unsigned long)card->utopia_pcr;
3487 tst_entries = (int) (tmpl / (unsigned long)card->utopia_pcr);
3488 if (modl)
3489 tst_entries++;
3490 card->tst_free -= tst_entries;
3491 fill_tst(card, NULL, tst_entries, TSTE_OPC_NULL);
3492
3493 #ifdef HAVE_EEPROM
3494 idt77252_eeprom_init(card);
3495 printk("%s: EEPROM: %02x:", card->name,
3496 idt77252_eeprom_read_status(card));
3497
3498 for (i = 0; i < 0x80; i++) {
3499 printk(" %02x",
3500 idt77252_eeprom_read_byte(card, i)
3501 );
3502 }
3503 printk("\n");
3504 #endif /* HAVE_EEPROM */
3505
3506 /*
3507 * XXX: <hack>
3508 */
3509 sprintf(tname, "eth%d", card->index);
3510 tmp = dev_get_by_name(&init_net, tname); /* jhs: was "tmp = dev_get(tname);" */
3511 if (tmp) {
3512 memcpy(card->atmdev->esi, tmp->dev_addr, 6);
3513 dev_put(tmp);
3514 printk("%s: ESI %pM\n", card->name, card->atmdev->esi);
3515 }
3516 /*
3517 * XXX: </hack>
3518 */
3519
3520 /* Set Maximum Deficit Count for now. */
3521 writel(0xffff, SAR_REG_MDFCT);
3522
3523 set_bit(IDT77252_BIT_INIT, &card->flags);
3524
3525 XPRINTK("%s: IDT77252 ABR SAR initialization complete.\n", card->name);
3526 return 0;
3527 }
3528
3529
3530 /*****************************************************************************/
3531 /* */
3532 /* Probing of IDT77252 ABR SAR */
3533 /* */
3534 /*****************************************************************************/
3535
3536
3537 static int idt77252_preset(struct idt77252_dev *card)
3538 {
3539 u16 pci_command;
3540
3541 /*****************************************************************/
3542 /* P C I C O N F I G U R A T I O N */
3543 /*****************************************************************/
3544
3545 XPRINTK("%s: Enable PCI master and memory access for SAR.\n",
3546 card->name);
3547 if (pci_read_config_word(card->pcidev, PCI_COMMAND, &pci_command)) {
3548 printk("%s: can't read PCI_COMMAND.\n", card->name);
3549 deinit_card(card);
3550 return -1;
3551 }
3552 if (!(pci_command & PCI_COMMAND_IO)) {
3553 printk("%s: PCI_COMMAND: %04x (???)\n",
3554 card->name, pci_command);
3555 deinit_card(card);
3556 return (-1);
3557 }
3558 pci_command |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
3559 if (pci_write_config_word(card->pcidev, PCI_COMMAND, pci_command)) {
3560 printk("%s: can't write PCI_COMMAND.\n", card->name);
3561 deinit_card(card);
3562 return -1;
3563 }
3564 /*****************************************************************/
3565 /* G E N E R I C R E S E T */
3566 /*****************************************************************/
3567
3568 /* Software reset */
3569 writel(SAR_CFG_SWRST, SAR_REG_CFG);
3570 mdelay(1);
3571 writel(0, SAR_REG_CFG);
3572
3573 IPRINTK("%s: Software resetted.\n", card->name);
3574 return 0;
3575 }
3576
3577
3578 static unsigned long probe_sram(struct idt77252_dev *card)
3579 {
3580 u32 data, addr;
3581
3582 writel(0, SAR_REG_DR0);
3583 writel(SAR_CMD_WRITE_SRAM | (0 << 2), SAR_REG_CMD);
3584
3585 for (addr = 0x4000; addr < 0x80000; addr += 0x4000) {
3586 writel(ATM_POISON, SAR_REG_DR0);
3587 writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD);
3588
3589 writel(SAR_CMD_READ_SRAM | (0 << 2), SAR_REG_CMD);
3590 data = readl(SAR_REG_DR0);
3591
3592 if (data != 0)
3593 break;
3594 }
3595
3596 return addr * sizeof(u32);
3597 }
3598
3599 static int idt77252_init_one(struct pci_dev *pcidev,
3600 const struct pci_device_id *id)
3601 {
3602 static struct idt77252_dev **last = &idt77252_chain;
3603 static int index = 0;
3604
3605 unsigned long membase, srambase;
3606 struct idt77252_dev *card;
3607 struct atm_dev *dev;
3608 int i, err;
3609
3610
3611 if ((err = pci_enable_device(pcidev))) {
3612 printk("idt77252: can't enable PCI device at %s\n", pci_name(pcidev));
3613 return err;
3614 }
3615
3616 if ((err = dma_set_mask_and_coherent(&pcidev->dev, DMA_BIT_MASK(32)))) {
3617 printk("idt77252: can't enable DMA for PCI device at %s\n", pci_name(pcidev));
3618 return err;
3619 }
3620
3621 card = kzalloc(sizeof(struct idt77252_dev), GFP_KERNEL);
3622 if (!card) {
3623 printk("idt77252-%d: can't allocate private data\n", index);
3624 err = -ENOMEM;
3625 goto err_out_disable_pdev;
3626 }
3627 card->revision = pcidev->revision;
3628 card->index = index;
3629 card->pcidev = pcidev;
3630 sprintf(card->name, "idt77252-%d", card->index);
3631
3632 INIT_WORK(&card->tqueue, idt77252_softint);
3633
3634 membase = pci_resource_start(pcidev, 1);
3635 srambase = pci_resource_start(pcidev, 2);
3636
3637 mutex_init(&card->mutex);
3638 spin_lock_init(&card->cmd_lock);
3639 spin_lock_init(&card->tst_lock);
3640
3641 init_timer(&card->tst_timer);
3642 card->tst_timer.data = (unsigned long)card;
3643 card->tst_timer.function = tst_timer;
3644
3645 /* Do the I/O remapping... */
3646 card->membase = ioremap(membase, 1024);
3647 if (!card->membase) {
3648 printk("%s: can't ioremap() membase\n", card->name);
3649 err = -EIO;
3650 goto err_out_free_card;
3651 }
3652
3653 if (idt77252_preset(card)) {
3654 printk("%s: preset failed\n", card->name);
3655 err = -EIO;
3656 goto err_out_iounmap;
3657 }
3658
3659 dev = atm_dev_register("idt77252", &pcidev->dev, &idt77252_ops, -1,
3660 NULL);
3661 if (!dev) {
3662 printk("%s: can't register atm device\n", card->name);
3663 err = -EIO;
3664 goto err_out_iounmap;
3665 }
3666 dev->dev_data = card;
3667 card->atmdev = dev;
3668
3669 #ifdef CONFIG_ATM_IDT77252_USE_SUNI
3670 suni_init(dev);
3671 if (!dev->phy) {
3672 printk("%s: can't init SUNI\n", card->name);
3673 err = -EIO;
3674 goto err_out_deinit_card;
3675 }
3676 #endif /* CONFIG_ATM_IDT77252_USE_SUNI */
3677
3678 card->sramsize = probe_sram(card);
3679
3680 for (i = 0; i < 4; i++) {
3681 card->fbq[i] = ioremap(srambase | 0x200000 | (i << 18), 4);
3682 if (!card->fbq[i]) {
3683 printk("%s: can't ioremap() FBQ%d\n", card->name, i);
3684 err = -EIO;
3685 goto err_out_deinit_card;
3686 }
3687 }
3688
3689 printk("%s: ABR SAR (Rev %c): MEM %08lx SRAM %08lx [%u KB]\n",
3690 card->name, ((card->revision > 1) && (card->revision < 25)) ?
3691 'A' + card->revision - 1 : '?', membase, srambase,
3692 card->sramsize / 1024);
3693
3694 if (init_card(dev)) {
3695 printk("%s: init_card failed\n", card->name);
3696 err = -EIO;
3697 goto err_out_deinit_card;
3698 }
3699
3700 dev->ci_range.vpi_bits = card->vpibits;
3701 dev->ci_range.vci_bits = card->vcibits;
3702 dev->link_rate = card->link_pcr;
3703
3704 if (dev->phy->start)
3705 dev->phy->start(dev);
3706
3707 if (idt77252_dev_open(card)) {
3708 printk("%s: dev_open failed\n", card->name);
3709 err = -EIO;
3710 goto err_out_stop;
3711 }
3712
3713 *last = card;
3714 last = &card->next;
3715 index++;
3716
3717 return 0;
3718
3719 err_out_stop:
3720 if (dev->phy->stop)
3721 dev->phy->stop(dev);
3722
3723 err_out_deinit_card:
3724 deinit_card(card);
3725
3726 err_out_iounmap:
3727 iounmap(card->membase);
3728
3729 err_out_free_card:
3730 kfree(card);
3731
3732 err_out_disable_pdev:
3733 pci_disable_device(pcidev);
3734 return err;
3735 }
3736
3737 static struct pci_device_id idt77252_pci_tbl[] =
3738 {
3739 { PCI_VDEVICE(IDT, PCI_DEVICE_ID_IDT_IDT77252), 0 },
3740 { 0, }
3741 };
3742
3743 MODULE_DEVICE_TABLE(pci, idt77252_pci_tbl);
3744
3745 static struct pci_driver idt77252_driver = {
3746 .name = "idt77252",
3747 .id_table = idt77252_pci_tbl,
3748 .probe = idt77252_init_one,
3749 };
3750
3751 static int __init idt77252_init(void)
3752 {
3753 struct sk_buff *skb;
3754
3755 printk("%s: at %p\n", __func__, idt77252_init);
3756
3757 if (sizeof(skb->cb) < sizeof(struct atm_skb_data) +
3758 sizeof(struct idt77252_skb_prv)) {
3759 printk(KERN_ERR "%s: skb->cb is too small (%lu < %lu)\n",
3760 __func__, (unsigned long) sizeof(skb->cb),
3761 (unsigned long) sizeof(struct atm_skb_data) +
3762 sizeof(struct idt77252_skb_prv));
3763 return -EIO;
3764 }
3765
3766 return pci_register_driver(&idt77252_driver);
3767 }
3768
3769 static void __exit idt77252_exit(void)
3770 {
3771 struct idt77252_dev *card;
3772 struct atm_dev *dev;
3773
3774 pci_unregister_driver(&idt77252_driver);
3775
3776 while (idt77252_chain) {
3777 card = idt77252_chain;
3778 dev = card->atmdev;
3779 idt77252_chain = card->next;
3780
3781 if (dev->phy->stop)
3782 dev->phy->stop(dev);
3783 deinit_card(card);
3784 pci_disable_device(card->pcidev);
3785 kfree(card);
3786 }
3787
3788 DIPRINTK("idt77252: finished cleanup-module().\n");
3789 }
3790
3791 module_init(idt77252_init);
3792 module_exit(idt77252_exit);
3793
3794 MODULE_LICENSE("GPL");
3795
3796 module_param(vpibits, uint, 0);
3797 MODULE_PARM_DESC(vpibits, "number of VPI bits supported (0, 1, or 2)");
3798 #ifdef CONFIG_ATM_IDT77252_DEBUG
3799 module_param(debug, ulong, 0644);
3800 MODULE_PARM_DESC(debug, "debug bitmap, see drivers/atm/idt77252.h");
3801 #endif
3802
3803 MODULE_AUTHOR("Eddie C. Dost <ecd@atecom.com>");
3804 MODULE_DESCRIPTION("IDT77252 ABR SAR Driver");
Linux kernel - Deliverables
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