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