87b17c33b3f958595d6fec200b55432714475927
[linux-3.10.git] / drivers / atm / idt77252.c
1 /******************************************************************* 
2  * ident "$Id: idt77252.c,v 1.2 2001/11/11 08:13:54 ecd Exp $"
3  *
4  * $Author: ecd $
5  * $Date: 2001/11/11 08:13:54 $
6  *
7  * Copyright (c) 2000 ATecoM GmbH 
8  *
9  * The author may be reached at ecd@atecom.com.
10  *
11  * This program is free software; you can redistribute  it and/or modify it
12  * under  the terms of  the GNU General  Public License as published by the
13  * Free Software Foundation;  either version 2 of the  License, or (at your
14  * option) any later version.
15  *
16  * THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR   IMPLIED
17  * WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
19  * NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT,  INDIRECT,
20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21  * NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
22  * USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
23  * ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26  *
27  * You should have received a copy of the  GNU General Public License along
28  * with this program; if not, write  to the Free Software Foundation, Inc.,
29  * 675 Mass Ave, Cambridge, MA 02139, USA.
30  *
31  *******************************************************************/
32 static char const rcsid[] =
33 "$Id: idt77252.c,v 1.2 2001/11/11 08:13:54 ecd Exp $";
34
35
36 #include <linux/module.h>
37 #include <linux/pci.h>
38 #include <linux/poison.h>
39 #include <linux/skbuff.h>
40 #include <linux/kernel.h>
41 #include <linux/vmalloc.h>
42 #include <linux/netdevice.h>
43 #include <linux/atmdev.h>
44 #include <linux/atm.h>
45 #include <linux/delay.h>
46 #include <linux/init.h>
47 #include <linux/bitops.h>
48 #include <linux/wait.h>
49 #include <linux/jiffies.h>
50 #include <asm/semaphore.h>
51 #include <asm/io.h>
52 #include <asm/uaccess.h>
53 #include <asm/atomic.h>
54 #include <asm/byteorder.h>
55
56 #ifdef CONFIG_ATM_IDT77252_USE_SUNI
57 #include "suni.h"
58 #endif /* CONFIG_ATM_IDT77252_USE_SUNI */
59
60
61 #include "idt77252.h"
62 #include "idt77252_tables.h"
63
64 static unsigned int vpibits = 1;
65
66
67 #define CONFIG_ATM_IDT77252_SEND_IDLE 1
68
69
70 /*
71  * Debug HACKs.
72  */
73 #define DEBUG_MODULE 1
74 #undef HAVE_EEPROM      /* does not work, yet. */
75
76 #ifdef CONFIG_ATM_IDT77252_DEBUG
77 static unsigned long debug = DBG_GENERAL;
78 #endif
79
80
81 #define SAR_RX_DELAY    (SAR_CFG_RXINT_NODELAY)
82
83
84 /*
85  * SCQ Handling.
86  */
87 static struct scq_info *alloc_scq(struct idt77252_dev *, int);
88 static void free_scq(struct idt77252_dev *, struct scq_info *);
89 static int queue_skb(struct idt77252_dev *, struct vc_map *,
90                      struct sk_buff *, int oam);
91 static void drain_scq(struct idt77252_dev *, struct vc_map *);
92 static unsigned long get_free_scd(struct idt77252_dev *, struct vc_map *);
93 static void fill_scd(struct idt77252_dev *, struct scq_info *, int);
94
95 /*
96  * FBQ Handling.
97  */
98 static int push_rx_skb(struct idt77252_dev *,
99                        struct sk_buff *, int queue);
100 static void recycle_rx_skb(struct idt77252_dev *, struct sk_buff *);
101 static void flush_rx_pool(struct idt77252_dev *, struct rx_pool *);
102 static void recycle_rx_pool_skb(struct idt77252_dev *,
103                                 struct rx_pool *);
104 static void add_rx_skb(struct idt77252_dev *, int queue,
105                        unsigned int size, unsigned int count);
106
107 /*
108  * RSQ Handling.
109  */
110 static int init_rsq(struct idt77252_dev *);
111 static void deinit_rsq(struct idt77252_dev *);
112 static void idt77252_rx(struct idt77252_dev *);
113
114 /*
115  * TSQ handling.
116  */
117 static int init_tsq(struct idt77252_dev *);
118 static void deinit_tsq(struct idt77252_dev *);
119 static void idt77252_tx(struct idt77252_dev *);
120
121
122 /*
123  * ATM Interface.
124  */
125 static void idt77252_dev_close(struct atm_dev *dev);
126 static int idt77252_open(struct atm_vcc *vcc);
127 static void idt77252_close(struct atm_vcc *vcc);
128 static int idt77252_send(struct atm_vcc *vcc, struct sk_buff *skb);
129 static int idt77252_send_oam(struct atm_vcc *vcc, void *cell,
130                              int flags);
131 static void idt77252_phy_put(struct atm_dev *dev, unsigned char value,
132                              unsigned long addr);
133 static unsigned char idt77252_phy_get(struct atm_dev *dev, unsigned long addr);
134 static int idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos,
135                                int flags);
136 static int idt77252_proc_read(struct atm_dev *dev, loff_t * pos,
137                               char *page);
138 static void idt77252_softint(void *dev_id);
139
140
141 static struct atmdev_ops idt77252_ops =
142 {
143         .dev_close      = idt77252_dev_close,
144         .open           = idt77252_open,
145         .close          = idt77252_close,
146         .send           = idt77252_send,
147         .send_oam       = idt77252_send_oam,
148         .phy_put        = idt77252_phy_put,
149         .phy_get        = idt77252_phy_get,
150         .change_qos     = idt77252_change_qos,
151         .proc_read      = idt77252_proc_read,
152         .owner          = THIS_MODULE
153 };
154
155 static struct idt77252_dev *idt77252_chain = NULL;
156 static unsigned int idt77252_sram_write_errors = 0;
157
158 /*****************************************************************************/
159 /*                                                                           */
160 /* I/O and Utility Bus                                                       */
161 /*                                                                           */
162 /*****************************************************************************/
163
164 static void
165 waitfor_idle(struct idt77252_dev *card)
166 {
167         u32 stat;
168
169         stat = readl(SAR_REG_STAT);
170         while (stat & SAR_STAT_CMDBZ)
171                 stat = readl(SAR_REG_STAT);
172 }
173
174 static u32
175 read_sram(struct idt77252_dev *card, unsigned long addr)
176 {
177         unsigned long flags;
178         u32 value;
179
180         spin_lock_irqsave(&card->cmd_lock, flags);
181         writel(SAR_CMD_READ_SRAM | (addr << 2), SAR_REG_CMD);
182         waitfor_idle(card);
183         value = readl(SAR_REG_DR0);
184         spin_unlock_irqrestore(&card->cmd_lock, flags);
185         return value;
186 }
187
188 static void
189 write_sram(struct idt77252_dev *card, unsigned long addr, u32 value)
190 {
191         unsigned long flags;
192
193         if ((idt77252_sram_write_errors == 0) &&
194             (((addr > card->tst[0] + card->tst_size - 2) &&
195               (addr < card->tst[0] + card->tst_size)) ||
196              ((addr > card->tst[1] + card->tst_size - 2) &&
197               (addr < card->tst[1] + card->tst_size)))) {
198                 printk("%s: ERROR: TST JMP section at %08lx written: %08x\n",
199                        card->name, addr, value);
200         }
201
202         spin_lock_irqsave(&card->cmd_lock, flags);
203         writel(value, SAR_REG_DR0);
204         writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD);
205         waitfor_idle(card);
206         spin_unlock_irqrestore(&card->cmd_lock, flags);
207 }
208
209 static u8
210 read_utility(void *dev, unsigned long ubus_addr)
211 {
212         struct idt77252_dev *card = dev;
213         unsigned long flags;
214         u8 value;
215
216         if (!card) {
217                 printk("Error: No such device.\n");
218                 return -1;
219         }
220
221         spin_lock_irqsave(&card->cmd_lock, flags);
222         writel(SAR_CMD_READ_UTILITY + ubus_addr, SAR_REG_CMD);
223         waitfor_idle(card);
224         value = readl(SAR_REG_DR0);
225         spin_unlock_irqrestore(&card->cmd_lock, flags);
226         return value;
227 }
228
229 static void
230 write_utility(void *dev, unsigned long ubus_addr, u8 value)
231 {
232         struct idt77252_dev *card = dev;
233         unsigned long flags;
234
235         if (!card) {
236                 printk("Error: No such device.\n");
237                 return;
238         }
239
240         spin_lock_irqsave(&card->cmd_lock, flags);
241         writel((u32) value, SAR_REG_DR0);
242         writel(SAR_CMD_WRITE_UTILITY + ubus_addr, SAR_REG_CMD);
243         waitfor_idle(card);
244         spin_unlock_irqrestore(&card->cmd_lock, flags);
245 }
246
247 #ifdef HAVE_EEPROM
248 static u32 rdsrtab[] =
249 {
250         SAR_GP_EECS | SAR_GP_EESCLK,
251         0,
252         SAR_GP_EESCLK,                  /* 0 */
253         0,
254         SAR_GP_EESCLK,                  /* 0 */
255         0,
256         SAR_GP_EESCLK,                  /* 0 */
257         0,
258         SAR_GP_EESCLK,                  /* 0 */
259         0,
260         SAR_GP_EESCLK,                  /* 0 */
261         SAR_GP_EEDO,
262         SAR_GP_EESCLK | SAR_GP_EEDO,    /* 1 */
263         0,
264         SAR_GP_EESCLK,                  /* 0 */
265         SAR_GP_EEDO,
266         SAR_GP_EESCLK | SAR_GP_EEDO     /* 1 */
267 };
268
269 static u32 wrentab[] =
270 {
271         SAR_GP_EECS | SAR_GP_EESCLK,
272         0,
273         SAR_GP_EESCLK,                  /* 0 */
274         0,
275         SAR_GP_EESCLK,                  /* 0 */
276         0,
277         SAR_GP_EESCLK,                  /* 0 */
278         0,
279         SAR_GP_EESCLK,                  /* 0 */
280         SAR_GP_EEDO,
281         SAR_GP_EESCLK | SAR_GP_EEDO,    /* 1 */
282         SAR_GP_EEDO,
283         SAR_GP_EESCLK | SAR_GP_EEDO,    /* 1 */
284         0,
285         SAR_GP_EESCLK,                  /* 0 */
286         0,
287         SAR_GP_EESCLK                   /* 0 */
288 };
289
290 static u32 rdtab[] =
291 {
292         SAR_GP_EECS | SAR_GP_EESCLK,
293         0,
294         SAR_GP_EESCLK,                  /* 0 */
295         0,
296         SAR_GP_EESCLK,                  /* 0 */
297         0,
298         SAR_GP_EESCLK,                  /* 0 */
299         0,
300         SAR_GP_EESCLK,                  /* 0 */
301         0,
302         SAR_GP_EESCLK,                  /* 0 */
303         0,
304         SAR_GP_EESCLK,                  /* 0 */
305         SAR_GP_EEDO,
306         SAR_GP_EESCLK | SAR_GP_EEDO,    /* 1 */
307         SAR_GP_EEDO,
308         SAR_GP_EESCLK | SAR_GP_EEDO     /* 1 */
309 };
310
311 static u32 wrtab[] =
312 {
313         SAR_GP_EECS | SAR_GP_EESCLK,
314         0,
315         SAR_GP_EESCLK,                  /* 0 */
316         0,
317         SAR_GP_EESCLK,                  /* 0 */
318         0,
319         SAR_GP_EESCLK,                  /* 0 */
320         0,
321         SAR_GP_EESCLK,                  /* 0 */
322         0,
323         SAR_GP_EESCLK,                  /* 0 */
324         0,
325         SAR_GP_EESCLK,                  /* 0 */
326         SAR_GP_EEDO,
327         SAR_GP_EESCLK | SAR_GP_EEDO,    /* 1 */
328         0,
329         SAR_GP_EESCLK                   /* 0 */
330 };
331
332 static u32 clktab[] =
333 {
334         0,
335         SAR_GP_EESCLK,
336         0,
337         SAR_GP_EESCLK,
338         0,
339         SAR_GP_EESCLK,
340         0,
341         SAR_GP_EESCLK,
342         0,
343         SAR_GP_EESCLK,
344         0,
345         SAR_GP_EESCLK,
346         0,
347         SAR_GP_EESCLK,
348         0,
349         SAR_GP_EESCLK,
350         0
351 };
352
353 static u32
354 idt77252_read_gp(struct idt77252_dev *card)
355 {
356         u32 gp;
357
358         gp = readl(SAR_REG_GP);
359 #if 0
360         printk("RD: %s\n", gp & SAR_GP_EEDI ? "1" : "0");
361 #endif
362         return gp;
363 }
364
365 static void
366 idt77252_write_gp(struct idt77252_dev *card, u32 value)
367 {
368         unsigned long flags;
369
370 #if 0
371         printk("WR: %s %s %s\n", value & SAR_GP_EECS ? "   " : "/CS",
372                value & SAR_GP_EESCLK ? "HIGH" : "LOW ",
373                value & SAR_GP_EEDO   ? "1" : "0");
374 #endif
375
376         spin_lock_irqsave(&card->cmd_lock, flags);
377         waitfor_idle(card);
378         writel(value, SAR_REG_GP);
379         spin_unlock_irqrestore(&card->cmd_lock, flags);
380 }
381
382 static u8
383 idt77252_eeprom_read_status(struct idt77252_dev *card)
384 {
385         u8 byte;
386         u32 gp;
387         int i, j;
388
389         gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
390
391         for (i = 0; i < sizeof(rdsrtab)/sizeof(rdsrtab[0]); i++) {
392                 idt77252_write_gp(card, gp | rdsrtab[i]);
393                 udelay(5);
394         }
395         idt77252_write_gp(card, gp | SAR_GP_EECS);
396         udelay(5);
397
398         byte = 0;
399         for (i = 0, j = 0; i < 8; i++) {
400                 byte <<= 1;
401
402                 idt77252_write_gp(card, gp | clktab[j++]);
403                 udelay(5);
404
405                 byte |= idt77252_read_gp(card) & SAR_GP_EEDI ? 1 : 0;
406
407                 idt77252_write_gp(card, gp | clktab[j++]);
408                 udelay(5);
409         }
410         idt77252_write_gp(card, gp | SAR_GP_EECS);
411         udelay(5);
412
413         return byte;
414 }
415
416 static u8
417 idt77252_eeprom_read_byte(struct idt77252_dev *card, u8 offset)
418 {
419         u8 byte;
420         u32 gp;
421         int i, j;
422
423         gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
424
425         for (i = 0; i < sizeof(rdtab)/sizeof(rdtab[0]); i++) {
426                 idt77252_write_gp(card, gp | rdtab[i]);
427                 udelay(5);
428         }
429         idt77252_write_gp(card, gp | SAR_GP_EECS);
430         udelay(5);
431
432         for (i = 0, j = 0; i < 8; i++) {
433                 idt77252_write_gp(card, gp | clktab[j++] |
434                                         (offset & 1 ? SAR_GP_EEDO : 0));
435                 udelay(5);
436
437                 idt77252_write_gp(card, gp | clktab[j++] |
438                                         (offset & 1 ? SAR_GP_EEDO : 0));
439                 udelay(5);
440
441                 offset >>= 1;
442         }
443         idt77252_write_gp(card, gp | SAR_GP_EECS);
444         udelay(5);
445
446         byte = 0;
447         for (i = 0, j = 0; i < 8; i++) {
448                 byte <<= 1;
449
450                 idt77252_write_gp(card, gp | clktab[j++]);
451                 udelay(5);
452
453                 byte |= idt77252_read_gp(card) & SAR_GP_EEDI ? 1 : 0;
454
455                 idt77252_write_gp(card, gp | clktab[j++]);
456                 udelay(5);
457         }
458         idt77252_write_gp(card, gp | SAR_GP_EECS);
459         udelay(5);
460
461         return byte;
462 }
463
464 static void
465 idt77252_eeprom_write_byte(struct idt77252_dev *card, u8 offset, u8 data)
466 {
467         u32 gp;
468         int i, j;
469
470         gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
471
472         for (i = 0; i < sizeof(wrentab)/sizeof(wrentab[0]); i++) {
473                 idt77252_write_gp(card, gp | wrentab[i]);
474                 udelay(5);
475         }
476         idt77252_write_gp(card, gp | SAR_GP_EECS);
477         udelay(5);
478
479         for (i = 0; i < sizeof(wrtab)/sizeof(wrtab[0]); i++) {
480                 idt77252_write_gp(card, gp | wrtab[i]);
481                 udelay(5);
482         }
483         idt77252_write_gp(card, gp | SAR_GP_EECS);
484         udelay(5);
485
486         for (i = 0, j = 0; i < 8; i++) {
487                 idt77252_write_gp(card, gp | clktab[j++] |
488                                         (offset & 1 ? SAR_GP_EEDO : 0));
489                 udelay(5);
490
491                 idt77252_write_gp(card, gp | clktab[j++] |
492                                         (offset & 1 ? SAR_GP_EEDO : 0));
493                 udelay(5);
494
495                 offset >>= 1;
496         }
497         idt77252_write_gp(card, gp | SAR_GP_EECS);
498         udelay(5);
499
500         for (i = 0, j = 0; i < 8; i++) {
501                 idt77252_write_gp(card, gp | clktab[j++] |
502                                         (data & 1 ? SAR_GP_EEDO : 0));
503                 udelay(5);
504
505                 idt77252_write_gp(card, gp | clktab[j++] |
506                                         (data & 1 ? SAR_GP_EEDO : 0));
507                 udelay(5);
508
509                 data >>= 1;
510         }
511         idt77252_write_gp(card, gp | SAR_GP_EECS);
512         udelay(5);
513 }
514
515 static void
516 idt77252_eeprom_init(struct idt77252_dev *card)
517 {
518         u32 gp;
519
520         gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
521
522         idt77252_write_gp(card, gp | SAR_GP_EECS | SAR_GP_EESCLK);
523         udelay(5);
524         idt77252_write_gp(card, gp | SAR_GP_EECS);
525         udelay(5);
526         idt77252_write_gp(card, gp | SAR_GP_EECS | SAR_GP_EESCLK);
527         udelay(5);
528         idt77252_write_gp(card, gp | SAR_GP_EECS);
529         udelay(5);
530 }
531 #endif /* HAVE_EEPROM */
532
533
534 #ifdef CONFIG_ATM_IDT77252_DEBUG
535 static void
536 dump_tct(struct idt77252_dev *card, int index)
537 {
538         unsigned long tct;
539         int i;
540
541         tct = (unsigned long) (card->tct_base + index * SAR_SRAM_TCT_SIZE);
542
543         printk("%s: TCT %x:", card->name, index);
544         for (i = 0; i < 8; i++) {
545                 printk(" %08x", read_sram(card, tct + i));
546         }
547         printk("\n");
548 }
549
550 static void
551 idt77252_tx_dump(struct idt77252_dev *card)
552 {
553         struct atm_vcc *vcc;
554         struct vc_map *vc;
555         int i;
556
557         printk("%s\n", __FUNCTION__);
558         for (i = 0; i < card->tct_size; i++) {
559                 vc = card->vcs[i];
560                 if (!vc)
561                         continue;
562
563                 vcc = NULL;
564                 if (vc->rx_vcc)
565                         vcc = vc->rx_vcc;
566                 else if (vc->tx_vcc)
567                         vcc = vc->tx_vcc;
568
569                 if (!vcc)
570                         continue;
571
572                 printk("%s: Connection %d:\n", card->name, vc->index);
573                 dump_tct(card, vc->index);
574         }
575 }
576 #endif
577
578
579 /*****************************************************************************/
580 /*                                                                           */
581 /* SCQ Handling                                                              */
582 /*                                                                           */
583 /*****************************************************************************/
584
585 static int
586 sb_pool_add(struct idt77252_dev *card, struct sk_buff *skb, int queue)
587 {
588         struct sb_pool *pool = &card->sbpool[queue];
589         int index;
590
591         index = pool->index;
592         while (pool->skb[index]) {
593                 index = (index + 1) & FBQ_MASK;
594                 if (index == pool->index)
595                         return -ENOBUFS;
596         }
597
598         pool->skb[index] = skb;
599         IDT77252_PRV_POOL(skb) = POOL_HANDLE(queue, index);
600
601         pool->index = (index + 1) & FBQ_MASK;
602         return 0;
603 }
604
605 static void
606 sb_pool_remove(struct idt77252_dev *card, struct sk_buff *skb)
607 {
608         unsigned int queue, index;
609         u32 handle;
610
611         handle = IDT77252_PRV_POOL(skb);
612
613         queue = POOL_QUEUE(handle);
614         if (queue > 3)
615                 return;
616
617         index = POOL_INDEX(handle);
618         if (index > FBQ_SIZE - 1)
619                 return;
620
621         card->sbpool[queue].skb[index] = NULL;
622 }
623
624 static struct sk_buff *
625 sb_pool_skb(struct idt77252_dev *card, u32 handle)
626 {
627         unsigned int queue, index;
628
629         queue = POOL_QUEUE(handle);
630         if (queue > 3)
631                 return NULL;
632
633         index = POOL_INDEX(handle);
634         if (index > FBQ_SIZE - 1)
635                 return NULL;
636
637         return card->sbpool[queue].skb[index];
638 }
639
640 static struct scq_info *
641 alloc_scq(struct idt77252_dev *card, int class)
642 {
643         struct scq_info *scq;
644
645         scq = kzalloc(sizeof(struct scq_info), GFP_KERNEL);
646         if (!scq)
647                 return NULL;
648         scq->base = pci_alloc_consistent(card->pcidev, SCQ_SIZE,
649                                          &scq->paddr);
650         if (scq->base == NULL) {
651                 kfree(scq);
652                 return NULL;
653         }
654         memset(scq->base, 0, SCQ_SIZE);
655
656         scq->next = scq->base;
657         scq->last = scq->base + (SCQ_ENTRIES - 1);
658         atomic_set(&scq->used, 0);
659
660         spin_lock_init(&scq->lock);
661         spin_lock_init(&scq->skblock);
662
663         skb_queue_head_init(&scq->transmit);
664         skb_queue_head_init(&scq->pending);
665
666         TXPRINTK("idt77252: SCQ: base 0x%p, next 0x%p, last 0x%p, paddr %08llx\n",
667                  scq->base, scq->next, scq->last, (unsigned long long)scq->paddr);
668
669         return scq;
670 }
671
672 static void
673 free_scq(struct idt77252_dev *card, struct scq_info *scq)
674 {
675         struct sk_buff *skb;
676         struct atm_vcc *vcc;
677
678         pci_free_consistent(card->pcidev, SCQ_SIZE,
679                             scq->base, scq->paddr);
680
681         while ((skb = skb_dequeue(&scq->transmit))) {
682                 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
683                                  skb->len, PCI_DMA_TODEVICE);
684
685                 vcc = ATM_SKB(skb)->vcc;
686                 if (vcc->pop)
687                         vcc->pop(vcc, skb);
688                 else
689                         dev_kfree_skb(skb);
690         }
691
692         while ((skb = skb_dequeue(&scq->pending))) {
693                 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
694                                  skb->len, PCI_DMA_TODEVICE);
695
696                 vcc = ATM_SKB(skb)->vcc;
697                 if (vcc->pop)
698                         vcc->pop(vcc, skb);
699                 else
700                         dev_kfree_skb(skb);
701         }
702
703         kfree(scq);
704 }
705
706
707 static int
708 push_on_scq(struct idt77252_dev *card, struct vc_map *vc, struct sk_buff *skb)
709 {
710         struct scq_info *scq = vc->scq;
711         unsigned long flags;
712         struct scqe *tbd;
713         int entries;
714
715         TXPRINTK("%s: SCQ: next 0x%p\n", card->name, scq->next);
716
717         atomic_inc(&scq->used);
718         entries = atomic_read(&scq->used);
719         if (entries > (SCQ_ENTRIES - 1)) {
720                 atomic_dec(&scq->used);
721                 goto out;
722         }
723
724         skb_queue_tail(&scq->transmit, skb);
725
726         spin_lock_irqsave(&vc->lock, flags);
727         if (vc->estimator) {
728                 struct atm_vcc *vcc = vc->tx_vcc;
729                 struct sock *sk = sk_atm(vcc);
730
731                 vc->estimator->cells += (skb->len + 47) / 48;
732                 if (atomic_read(&sk->sk_wmem_alloc) >
733                     (sk->sk_sndbuf >> 1)) {
734                         u32 cps = vc->estimator->maxcps;
735
736                         vc->estimator->cps = cps;
737                         vc->estimator->avcps = cps << 5;
738                         if (vc->lacr < vc->init_er) {
739                                 vc->lacr = vc->init_er;
740                                 writel(TCMDQ_LACR | (vc->lacr << 16) |
741                                        vc->index, SAR_REG_TCMDQ);
742                         }
743                 }
744         }
745         spin_unlock_irqrestore(&vc->lock, flags);
746
747         tbd = &IDT77252_PRV_TBD(skb);
748
749         spin_lock_irqsave(&scq->lock, flags);
750         scq->next->word_1 = cpu_to_le32(tbd->word_1 |
751                                         SAR_TBD_TSIF | SAR_TBD_GTSI);
752         scq->next->word_2 = cpu_to_le32(tbd->word_2);
753         scq->next->word_3 = cpu_to_le32(tbd->word_3);
754         scq->next->word_4 = cpu_to_le32(tbd->word_4);
755
756         if (scq->next == scq->last)
757                 scq->next = scq->base;
758         else
759                 scq->next++;
760
761         write_sram(card, scq->scd,
762                    scq->paddr +
763                    (u32)((unsigned long)scq->next - (unsigned long)scq->base));
764         spin_unlock_irqrestore(&scq->lock, flags);
765
766         scq->trans_start = jiffies;
767
768         if (test_and_clear_bit(VCF_IDLE, &vc->flags)) {
769                 writel(TCMDQ_START_LACR | (vc->lacr << 16) | vc->index,
770                        SAR_REG_TCMDQ);
771         }
772
773         TXPRINTK("%d entries in SCQ used (push).\n", atomic_read(&scq->used));
774
775         XPRINTK("%s: SCQ (after push %2d) head = 0x%x, next = 0x%p.\n",
776                 card->name, atomic_read(&scq->used),
777                 read_sram(card, scq->scd + 1), scq->next);
778
779         return 0;
780
781 out:
782         if (time_after(jiffies, scq->trans_start + HZ)) {
783                 printk("%s: Error pushing TBD for %d.%d\n",
784                        card->name, vc->tx_vcc->vpi, vc->tx_vcc->vci);
785 #ifdef CONFIG_ATM_IDT77252_DEBUG
786                 idt77252_tx_dump(card);
787 #endif
788                 scq->trans_start = jiffies;
789         }
790
791         return -ENOBUFS;
792 }
793
794
795 static void
796 drain_scq(struct idt77252_dev *card, struct vc_map *vc)
797 {
798         struct scq_info *scq = vc->scq;
799         struct sk_buff *skb;
800         struct atm_vcc *vcc;
801
802         TXPRINTK("%s: SCQ (before drain %2d) next = 0x%p.\n",
803                  card->name, atomic_read(&scq->used), scq->next);
804
805         skb = skb_dequeue(&scq->transmit);
806         if (skb) {
807                 TXPRINTK("%s: freeing skb at %p.\n", card->name, skb);
808
809                 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
810                                  skb->len, PCI_DMA_TODEVICE);
811
812                 vcc = ATM_SKB(skb)->vcc;
813
814                 if (vcc->pop)
815                         vcc->pop(vcc, skb);
816                 else
817                         dev_kfree_skb(skb);
818
819                 atomic_inc(&vcc->stats->tx);
820         }
821
822         atomic_dec(&scq->used);
823
824         spin_lock(&scq->skblock);
825         while ((skb = skb_dequeue(&scq->pending))) {
826                 if (push_on_scq(card, vc, skb)) {
827                         skb_queue_head(&vc->scq->pending, skb);
828                         break;
829                 }
830         }
831         spin_unlock(&scq->skblock);
832 }
833
834 static int
835 queue_skb(struct idt77252_dev *card, struct vc_map *vc,
836           struct sk_buff *skb, int oam)
837 {
838         struct atm_vcc *vcc;
839         struct scqe *tbd;
840         unsigned long flags;
841         int error;
842         int aal;
843
844         if (skb->len == 0) {
845                 printk("%s: invalid skb->len (%d)\n", card->name, skb->len);
846                 return -EINVAL;
847         }
848
849         TXPRINTK("%s: Sending %d bytes of data.\n",
850                  card->name, skb->len);
851
852         tbd = &IDT77252_PRV_TBD(skb);
853         vcc = ATM_SKB(skb)->vcc;
854
855         IDT77252_PRV_PADDR(skb) = pci_map_single(card->pcidev, skb->data,
856                                                  skb->len, PCI_DMA_TODEVICE);
857
858         error = -EINVAL;
859
860         if (oam) {
861                 if (skb->len != 52)
862                         goto errout;
863
864                 tbd->word_1 = SAR_TBD_OAM | ATM_CELL_PAYLOAD | SAR_TBD_EPDU;
865                 tbd->word_2 = IDT77252_PRV_PADDR(skb) + 4;
866                 tbd->word_3 = 0x00000000;
867                 tbd->word_4 = (skb->data[0] << 24) | (skb->data[1] << 16) |
868                               (skb->data[2] <<  8) | (skb->data[3] <<  0);
869
870                 if (test_bit(VCF_RSV, &vc->flags))
871                         vc = card->vcs[0];
872
873                 goto done;
874         }
875
876         if (test_bit(VCF_RSV, &vc->flags)) {
877                 printk("%s: Trying to transmit on reserved VC\n", card->name);
878                 goto errout;
879         }
880
881         aal = vcc->qos.aal;
882
883         switch (aal) {
884         case ATM_AAL0:
885         case ATM_AAL34:
886                 if (skb->len > 52)
887                         goto errout;
888
889                 if (aal == ATM_AAL0)
890                         tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL0 |
891                                       ATM_CELL_PAYLOAD;
892                 else
893                         tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL34 |
894                                       ATM_CELL_PAYLOAD;
895
896                 tbd->word_2 = IDT77252_PRV_PADDR(skb) + 4;
897                 tbd->word_3 = 0x00000000;
898                 tbd->word_4 = (skb->data[0] << 24) | (skb->data[1] << 16) |
899                               (skb->data[2] <<  8) | (skb->data[3] <<  0);
900                 break;
901
902         case ATM_AAL5:
903                 tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL5 | skb->len;
904                 tbd->word_2 = IDT77252_PRV_PADDR(skb);
905                 tbd->word_3 = skb->len;
906                 tbd->word_4 = (vcc->vpi << SAR_TBD_VPI_SHIFT) |
907                               (vcc->vci << SAR_TBD_VCI_SHIFT);
908                 break;
909
910         case ATM_AAL1:
911         case ATM_AAL2:
912         default:
913                 printk("%s: Traffic type not supported.\n", card->name);
914                 error = -EPROTONOSUPPORT;
915                 goto errout;
916         }
917
918 done:
919         spin_lock_irqsave(&vc->scq->skblock, flags);
920         skb_queue_tail(&vc->scq->pending, skb);
921
922         while ((skb = skb_dequeue(&vc->scq->pending))) {
923                 if (push_on_scq(card, vc, skb)) {
924                         skb_queue_head(&vc->scq->pending, skb);
925                         break;
926                 }
927         }
928         spin_unlock_irqrestore(&vc->scq->skblock, flags);
929
930         return 0;
931
932 errout:
933         pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
934                          skb->len, PCI_DMA_TODEVICE);
935         return error;
936 }
937
938 static unsigned long
939 get_free_scd(struct idt77252_dev *card, struct vc_map *vc)
940 {
941         int i;
942
943         for (i = 0; i < card->scd_size; i++) {
944                 if (!card->scd2vc[i]) {
945                         card->scd2vc[i] = vc;
946                         vc->scd_index = i;
947                         return card->scd_base + i * SAR_SRAM_SCD_SIZE;
948                 }
949         }
950         return 0;
951 }
952
953 static void
954 fill_scd(struct idt77252_dev *card, struct scq_info *scq, int class)
955 {
956         write_sram(card, scq->scd, scq->paddr);
957         write_sram(card, scq->scd + 1, 0x00000000);
958         write_sram(card, scq->scd + 2, 0xffffffff);
959         write_sram(card, scq->scd + 3, 0x00000000);
960 }
961
962 static void
963 clear_scd(struct idt77252_dev *card, struct scq_info *scq, int class)
964 {
965         return;
966 }
967
968 /*****************************************************************************/
969 /*                                                                           */
970 /* RSQ Handling                                                              */
971 /*                                                                           */
972 /*****************************************************************************/
973
974 static int
975 init_rsq(struct idt77252_dev *card)
976 {
977         struct rsq_entry *rsqe;
978
979         card->rsq.base = pci_alloc_consistent(card->pcidev, RSQSIZE,
980                                               &card->rsq.paddr);
981         if (card->rsq.base == NULL) {
982                 printk("%s: can't allocate RSQ.\n", card->name);
983                 return -1;
984         }
985         memset(card->rsq.base, 0, RSQSIZE);
986
987         card->rsq.last = card->rsq.base + RSQ_NUM_ENTRIES - 1;
988         card->rsq.next = card->rsq.last;
989         for (rsqe = card->rsq.base; rsqe <= card->rsq.last; rsqe++)
990                 rsqe->word_4 = 0;
991
992         writel((unsigned long) card->rsq.last - (unsigned long) card->rsq.base,
993                SAR_REG_RSQH);
994         writel(card->rsq.paddr, SAR_REG_RSQB);
995
996         IPRINTK("%s: RSQ base at 0x%lx (0x%x).\n", card->name,
997                 (unsigned long) card->rsq.base,
998                 readl(SAR_REG_RSQB));
999         IPRINTK("%s: RSQ head = 0x%x, base = 0x%x, tail = 0x%x.\n",
1000                 card->name,
1001                 readl(SAR_REG_RSQH),
1002                 readl(SAR_REG_RSQB),
1003                 readl(SAR_REG_RSQT));
1004
1005         return 0;
1006 }
1007
1008 static void
1009 deinit_rsq(struct idt77252_dev *card)
1010 {
1011         pci_free_consistent(card->pcidev, RSQSIZE,
1012                             card->rsq.base, card->rsq.paddr);
1013 }
1014
1015 static void
1016 dequeue_rx(struct idt77252_dev *card, struct rsq_entry *rsqe)
1017 {
1018         struct atm_vcc *vcc;
1019         struct sk_buff *skb;
1020         struct rx_pool *rpp;
1021         struct vc_map *vc;
1022         u32 header, vpi, vci;
1023         u32 stat;
1024         int i;
1025
1026         stat = le32_to_cpu(rsqe->word_4);
1027
1028         if (stat & SAR_RSQE_IDLE) {
1029                 RXPRINTK("%s: message about inactive connection.\n",
1030                          card->name);
1031                 return;
1032         }
1033
1034         skb = sb_pool_skb(card, le32_to_cpu(rsqe->word_2));
1035         if (skb == NULL) {
1036                 printk("%s: NULL skb in %s, rsqe: %08x %08x %08x %08x\n",
1037                        card->name, __FUNCTION__,
1038                        le32_to_cpu(rsqe->word_1), le32_to_cpu(rsqe->word_2),
1039                        le32_to_cpu(rsqe->word_3), le32_to_cpu(rsqe->word_4));
1040                 return;
1041         }
1042
1043         header = le32_to_cpu(rsqe->word_1);
1044         vpi = (header >> 16) & 0x00ff;
1045         vci = (header >>  0) & 0xffff;
1046
1047         RXPRINTK("%s: SDU for %d.%d received in buffer 0x%p (data 0x%p).\n",
1048                  card->name, vpi, vci, skb, skb->data);
1049
1050         if ((vpi >= (1 << card->vpibits)) || (vci != (vci & card->vcimask))) {
1051                 printk("%s: SDU received for out-of-range vc %u.%u\n",
1052                        card->name, vpi, vci);
1053                 recycle_rx_skb(card, skb);
1054                 return;
1055         }
1056
1057         vc = card->vcs[VPCI2VC(card, vpi, vci)];
1058         if (!vc || !test_bit(VCF_RX, &vc->flags)) {
1059                 printk("%s: SDU received on non RX vc %u.%u\n",
1060                        card->name, vpi, vci);
1061                 recycle_rx_skb(card, skb);
1062                 return;
1063         }
1064
1065         vcc = vc->rx_vcc;
1066
1067         pci_dma_sync_single_for_cpu(card->pcidev, IDT77252_PRV_PADDR(skb),
1068                                     skb->end - skb->data, PCI_DMA_FROMDEVICE);
1069
1070         if ((vcc->qos.aal == ATM_AAL0) ||
1071             (vcc->qos.aal == ATM_AAL34)) {
1072                 struct sk_buff *sb;
1073                 unsigned char *cell;
1074                 u32 aal0;
1075
1076                 cell = skb->data;
1077                 for (i = (stat & SAR_RSQE_CELLCNT); i; i--) {
1078                         if ((sb = dev_alloc_skb(64)) == NULL) {
1079                                 printk("%s: Can't allocate buffers for aal0.\n",
1080                                        card->name);
1081                                 atomic_add(i, &vcc->stats->rx_drop);
1082                                 break;
1083                         }
1084                         if (!atm_charge(vcc, sb->truesize)) {
1085                                 RXPRINTK("%s: atm_charge() dropped aal0 packets.\n",
1086                                          card->name);
1087                                 atomic_add(i - 1, &vcc->stats->rx_drop);
1088                                 dev_kfree_skb(sb);
1089                                 break;
1090                         }
1091                         aal0 = (vpi << ATM_HDR_VPI_SHIFT) |
1092                                (vci << ATM_HDR_VCI_SHIFT);
1093                         aal0 |= (stat & SAR_RSQE_EPDU) ? 0x00000002 : 0;
1094                         aal0 |= (stat & SAR_RSQE_CLP)  ? 0x00000001 : 0;
1095
1096                         *((u32 *) sb->data) = aal0;
1097                         skb_put(sb, sizeof(u32));
1098                         memcpy(skb_put(sb, ATM_CELL_PAYLOAD),
1099                                cell, ATM_CELL_PAYLOAD);
1100
1101                         ATM_SKB(sb)->vcc = vcc;
1102                         __net_timestamp(sb);
1103                         vcc->push(vcc, sb);
1104                         atomic_inc(&vcc->stats->rx);
1105
1106                         cell += ATM_CELL_PAYLOAD;
1107                 }
1108
1109                 recycle_rx_skb(card, skb);
1110                 return;
1111         }
1112         if (vcc->qos.aal != ATM_AAL5) {
1113                 printk("%s: Unexpected AAL type in dequeue_rx(): %d.\n",
1114                        card->name, vcc->qos.aal);
1115                 recycle_rx_skb(card, skb);
1116                 return;
1117         }
1118         skb->len = (stat & SAR_RSQE_CELLCNT) * ATM_CELL_PAYLOAD;
1119
1120         rpp = &vc->rcv.rx_pool;
1121
1122         rpp->len += skb->len;
1123         if (!rpp->count++)
1124                 rpp->first = skb;
1125         *rpp->last = skb;
1126         rpp->last = &skb->next;
1127
1128         if (stat & SAR_RSQE_EPDU) {
1129                 unsigned char *l1l2;
1130                 unsigned int len;
1131
1132                 l1l2 = (unsigned char *) ((unsigned long) skb->data + skb->len - 6);
1133
1134                 len = (l1l2[0] << 8) | l1l2[1];
1135                 len = len ? len : 0x10000;
1136
1137                 RXPRINTK("%s: PDU has %d bytes.\n", card->name, len);
1138
1139                 if ((len + 8 > rpp->len) || (len + (47 + 8) < rpp->len)) {
1140                         RXPRINTK("%s: AAL5 PDU size mismatch: %d != %d. "
1141                                  "(CDC: %08x)\n",
1142                                  card->name, len, rpp->len, readl(SAR_REG_CDC));
1143                         recycle_rx_pool_skb(card, rpp);
1144                         atomic_inc(&vcc->stats->rx_err);
1145                         return;
1146                 }
1147                 if (stat & SAR_RSQE_CRC) {
1148                         RXPRINTK("%s: AAL5 CRC error.\n", card->name);
1149                         recycle_rx_pool_skb(card, rpp);
1150                         atomic_inc(&vcc->stats->rx_err);
1151                         return;
1152                 }
1153                 if (rpp->count > 1) {
1154                         struct sk_buff *sb;
1155
1156                         skb = dev_alloc_skb(rpp->len);
1157                         if (!skb) {
1158                                 RXPRINTK("%s: Can't alloc RX skb.\n",
1159                                          card->name);
1160                                 recycle_rx_pool_skb(card, rpp);
1161                                 atomic_inc(&vcc->stats->rx_err);
1162                                 return;
1163                         }
1164                         if (!atm_charge(vcc, skb->truesize)) {
1165                                 recycle_rx_pool_skb(card, rpp);
1166                                 dev_kfree_skb(skb);
1167                                 return;
1168                         }
1169                         sb = rpp->first;
1170                         for (i = 0; i < rpp->count; i++) {
1171                                 memcpy(skb_put(skb, sb->len),
1172                                        sb->data, sb->len);
1173                                 sb = sb->next;
1174                         }
1175
1176                         recycle_rx_pool_skb(card, rpp);
1177
1178                         skb_trim(skb, len);
1179                         ATM_SKB(skb)->vcc = vcc;
1180                         __net_timestamp(skb);
1181
1182                         vcc->push(vcc, skb);
1183                         atomic_inc(&vcc->stats->rx);
1184
1185                         return;
1186                 }
1187
1188                 skb->next = NULL;
1189                 flush_rx_pool(card, rpp);
1190
1191                 if (!atm_charge(vcc, skb->truesize)) {
1192                         recycle_rx_skb(card, skb);
1193                         return;
1194                 }
1195
1196                 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
1197                                  skb->end - skb->data, PCI_DMA_FROMDEVICE);
1198                 sb_pool_remove(card, skb);
1199
1200                 skb_trim(skb, len);
1201                 ATM_SKB(skb)->vcc = vcc;
1202                 __net_timestamp(skb);
1203
1204                 vcc->push(vcc, skb);
1205                 atomic_inc(&vcc->stats->rx);
1206
1207                 if (skb->truesize > SAR_FB_SIZE_3)
1208                         add_rx_skb(card, 3, SAR_FB_SIZE_3, 1);
1209                 else if (skb->truesize > SAR_FB_SIZE_2)
1210                         add_rx_skb(card, 2, SAR_FB_SIZE_2, 1);
1211                 else if (skb->truesize > SAR_FB_SIZE_1)
1212                         add_rx_skb(card, 1, SAR_FB_SIZE_1, 1);
1213                 else
1214                         add_rx_skb(card, 0, SAR_FB_SIZE_0, 1);
1215                 return;
1216         }
1217 }
1218
1219 static void
1220 idt77252_rx(struct idt77252_dev *card)
1221 {
1222         struct rsq_entry *rsqe;
1223
1224         if (card->rsq.next == card->rsq.last)
1225                 rsqe = card->rsq.base;
1226         else
1227                 rsqe = card->rsq.next + 1;
1228
1229         if (!(le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID)) {
1230                 RXPRINTK("%s: no entry in RSQ.\n", card->name);
1231                 return;
1232         }
1233
1234         do {
1235                 dequeue_rx(card, rsqe);
1236                 rsqe->word_4 = 0;
1237                 card->rsq.next = rsqe;
1238                 if (card->rsq.next == card->rsq.last)
1239                         rsqe = card->rsq.base;
1240                 else
1241                         rsqe = card->rsq.next + 1;
1242         } while (le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID);
1243
1244         writel((unsigned long) card->rsq.next - (unsigned long) card->rsq.base,
1245                SAR_REG_RSQH);
1246 }
1247
1248 static void
1249 idt77252_rx_raw(struct idt77252_dev *card)
1250 {
1251         struct sk_buff  *queue;
1252         u32             head, tail;
1253         struct atm_vcc  *vcc;
1254         struct vc_map   *vc;
1255         struct sk_buff  *sb;
1256
1257         if (card->raw_cell_head == NULL) {
1258                 u32 handle = le32_to_cpu(*(card->raw_cell_hnd + 1));
1259                 card->raw_cell_head = sb_pool_skb(card, handle);
1260         }
1261
1262         queue = card->raw_cell_head;
1263         if (!queue)
1264                 return;
1265
1266         head = IDT77252_PRV_PADDR(queue) + (queue->data - queue->head - 16);
1267         tail = readl(SAR_REG_RAWCT);
1268
1269         pci_dma_sync_single_for_cpu(card->pcidev, IDT77252_PRV_PADDR(queue),
1270                                     queue->end - queue->head - 16,
1271                                     PCI_DMA_FROMDEVICE);
1272
1273         while (head != tail) {
1274                 unsigned int vpi, vci, pti;
1275                 u32 header;
1276
1277                 header = le32_to_cpu(*(u32 *) &queue->data[0]);
1278
1279                 vpi = (header & ATM_HDR_VPI_MASK) >> ATM_HDR_VPI_SHIFT;
1280                 vci = (header & ATM_HDR_VCI_MASK) >> ATM_HDR_VCI_SHIFT;
1281                 pti = (header & ATM_HDR_PTI_MASK) >> ATM_HDR_PTI_SHIFT;
1282
1283 #ifdef CONFIG_ATM_IDT77252_DEBUG
1284                 if (debug & DBG_RAW_CELL) {
1285                         int i;
1286
1287                         printk("%s: raw cell %x.%02x.%04x.%x.%x\n",
1288                                card->name, (header >> 28) & 0x000f,
1289                                (header >> 20) & 0x00ff,
1290                                (header >>  4) & 0xffff,
1291                                (header >>  1) & 0x0007,
1292                                (header >>  0) & 0x0001);
1293                         for (i = 16; i < 64; i++)
1294                                 printk(" %02x", queue->data[i]);
1295                         printk("\n");
1296                 }
1297 #endif
1298
1299                 if (vpi >= (1<<card->vpibits) || vci >= (1<<card->vcibits)) {
1300                         RPRINTK("%s: SDU received for out-of-range vc %u.%u\n",
1301                                 card->name, vpi, vci);
1302                         goto drop;
1303                 }
1304
1305                 vc = card->vcs[VPCI2VC(card, vpi, vci)];
1306                 if (!vc || !test_bit(VCF_RX, &vc->flags)) {
1307                         RPRINTK("%s: SDU received on non RX vc %u.%u\n",
1308                                 card->name, vpi, vci);
1309                         goto drop;
1310                 }
1311
1312                 vcc = vc->rx_vcc;
1313
1314                 if (vcc->qos.aal != ATM_AAL0) {
1315                         RPRINTK("%s: raw cell for non AAL0 vc %u.%u\n",
1316                                 card->name, vpi, vci);
1317                         atomic_inc(&vcc->stats->rx_drop);
1318                         goto drop;
1319                 }
1320         
1321                 if ((sb = dev_alloc_skb(64)) == NULL) {
1322                         printk("%s: Can't allocate buffers for AAL0.\n",
1323                                card->name);
1324                         atomic_inc(&vcc->stats->rx_err);
1325                         goto drop;
1326                 }
1327
1328                 if (!atm_charge(vcc, sb->truesize)) {
1329                         RXPRINTK("%s: atm_charge() dropped AAL0 packets.\n",
1330                                  card->name);
1331                         dev_kfree_skb(sb);
1332                         goto drop;
1333                 }
1334
1335                 *((u32 *) sb->data) = header;
1336                 skb_put(sb, sizeof(u32));
1337                 memcpy(skb_put(sb, ATM_CELL_PAYLOAD), &(queue->data[16]),
1338                        ATM_CELL_PAYLOAD);
1339
1340                 ATM_SKB(sb)->vcc = vcc;
1341                 __net_timestamp(sb);
1342                 vcc->push(vcc, sb);
1343                 atomic_inc(&vcc->stats->rx);
1344
1345 drop:
1346                 skb_pull(queue, 64);
1347
1348                 head = IDT77252_PRV_PADDR(queue)
1349                                         + (queue->data - queue->head - 16);
1350
1351                 if (queue->len < 128) {
1352                         struct sk_buff *next;
1353                         u32 handle;
1354
1355                         head = le32_to_cpu(*(u32 *) &queue->data[0]);
1356                         handle = le32_to_cpu(*(u32 *) &queue->data[4]);
1357
1358                         next = sb_pool_skb(card, handle);
1359                         recycle_rx_skb(card, queue);
1360
1361                         if (next) {
1362                                 card->raw_cell_head = next;
1363                                 queue = card->raw_cell_head;
1364                                 pci_dma_sync_single_for_cpu(card->pcidev,
1365                                                             IDT77252_PRV_PADDR(queue),
1366                                                             queue->end - queue->data,
1367                                                             PCI_DMA_FROMDEVICE);
1368                         } else {
1369                                 card->raw_cell_head = NULL;
1370                                 printk("%s: raw cell queue overrun\n",
1371                                        card->name);
1372                                 break;
1373                         }
1374                 }
1375         }
1376 }
1377
1378
1379 /*****************************************************************************/
1380 /*                                                                           */
1381 /* TSQ Handling                                                              */
1382 /*                                                                           */
1383 /*****************************************************************************/
1384
1385 static int
1386 init_tsq(struct idt77252_dev *card)
1387 {
1388         struct tsq_entry *tsqe;
1389
1390         card->tsq.base = pci_alloc_consistent(card->pcidev, RSQSIZE,
1391                                               &card->tsq.paddr);
1392         if (card->tsq.base == NULL) {
1393                 printk("%s: can't allocate TSQ.\n", card->name);
1394                 return -1;
1395         }
1396         memset(card->tsq.base, 0, TSQSIZE);
1397
1398         card->tsq.last = card->tsq.base + TSQ_NUM_ENTRIES - 1;
1399         card->tsq.next = card->tsq.last;
1400         for (tsqe = card->tsq.base; tsqe <= card->tsq.last; tsqe++)
1401                 tsqe->word_2 = cpu_to_le32(SAR_TSQE_INVALID);
1402
1403         writel(card->tsq.paddr, SAR_REG_TSQB);
1404         writel((unsigned long) card->tsq.next - (unsigned long) card->tsq.base,
1405                SAR_REG_TSQH);
1406
1407         return 0;
1408 }
1409
1410 static void
1411 deinit_tsq(struct idt77252_dev *card)
1412 {
1413         pci_free_consistent(card->pcidev, TSQSIZE,
1414                             card->tsq.base, card->tsq.paddr);
1415 }
1416
1417 static void
1418 idt77252_tx(struct idt77252_dev *card)
1419 {
1420         struct tsq_entry *tsqe;
1421         unsigned int vpi, vci;
1422         struct vc_map *vc;
1423         u32 conn, stat;
1424
1425         if (card->tsq.next == card->tsq.last)
1426                 tsqe = card->tsq.base;
1427         else
1428                 tsqe = card->tsq.next + 1;
1429
1430         TXPRINTK("idt77252_tx: tsq  %p: base %p, next %p, last %p\n", tsqe,
1431                  card->tsq.base, card->tsq.next, card->tsq.last);
1432         TXPRINTK("idt77252_tx: tsqb %08x, tsqt %08x, tsqh %08x, \n",
1433                  readl(SAR_REG_TSQB),
1434                  readl(SAR_REG_TSQT),
1435                  readl(SAR_REG_TSQH));
1436
1437         stat = le32_to_cpu(tsqe->word_2);
1438
1439         if (stat & SAR_TSQE_INVALID)
1440                 return;
1441
1442         do {
1443                 TXPRINTK("tsqe: 0x%p [0x%08x 0x%08x]\n", tsqe,
1444                          le32_to_cpu(tsqe->word_1),
1445                          le32_to_cpu(tsqe->word_2));
1446
1447                 switch (stat & SAR_TSQE_TYPE) {
1448                 case SAR_TSQE_TYPE_TIMER:
1449                         TXPRINTK("%s: Timer RollOver detected.\n", card->name);
1450                         break;
1451
1452                 case SAR_TSQE_TYPE_IDLE:
1453
1454                         conn = le32_to_cpu(tsqe->word_1);
1455
1456                         if (SAR_TSQE_TAG(stat) == 0x10) {
1457 #ifdef  NOTDEF
1458                                 printk("%s: Connection %d halted.\n",
1459                                        card->name,
1460                                        le32_to_cpu(tsqe->word_1) & 0x1fff);
1461 #endif
1462                                 break;
1463                         }
1464
1465                         vc = card->vcs[conn & 0x1fff];
1466                         if (!vc) {
1467                                 printk("%s: could not find VC from conn %d\n",
1468                                        card->name, conn & 0x1fff);
1469                                 break;
1470                         }
1471
1472                         printk("%s: Connection %d IDLE.\n",
1473                                card->name, vc->index);
1474
1475                         set_bit(VCF_IDLE, &vc->flags);
1476                         break;
1477
1478                 case SAR_TSQE_TYPE_TSR:
1479
1480                         conn = le32_to_cpu(tsqe->word_1);
1481
1482                         vc = card->vcs[conn & 0x1fff];
1483                         if (!vc) {
1484                                 printk("%s: no VC at index %d\n",
1485                                        card->name,
1486                                        le32_to_cpu(tsqe->word_1) & 0x1fff);
1487                                 break;
1488                         }
1489
1490                         drain_scq(card, vc);
1491                         break;
1492
1493                 case SAR_TSQE_TYPE_TBD_COMP:
1494
1495                         conn = le32_to_cpu(tsqe->word_1);
1496
1497                         vpi = (conn >> SAR_TBD_VPI_SHIFT) & 0x00ff;
1498                         vci = (conn >> SAR_TBD_VCI_SHIFT) & 0xffff;
1499
1500                         if (vpi >= (1 << card->vpibits) ||
1501                             vci >= (1 << card->vcibits)) {
1502                                 printk("%s: TBD complete: "
1503                                        "out of range VPI.VCI %u.%u\n",
1504                                        card->name, vpi, vci);
1505                                 break;
1506                         }
1507
1508                         vc = card->vcs[VPCI2VC(card, vpi, vci)];
1509                         if (!vc) {
1510                                 printk("%s: TBD complete: "
1511                                        "no VC at VPI.VCI %u.%u\n",
1512                                        card->name, vpi, vci);
1513                                 break;
1514                         }
1515
1516                         drain_scq(card, vc);
1517                         break;
1518                 }
1519
1520                 tsqe->word_2 = cpu_to_le32(SAR_TSQE_INVALID);
1521
1522                 card->tsq.next = tsqe;
1523                 if (card->tsq.next == card->tsq.last)
1524                         tsqe = card->tsq.base;
1525                 else
1526                         tsqe = card->tsq.next + 1;
1527
1528                 TXPRINTK("tsqe: %p: base %p, next %p, last %p\n", tsqe,
1529                          card->tsq.base, card->tsq.next, card->tsq.last);
1530
1531                 stat = le32_to_cpu(tsqe->word_2);
1532
1533         } while (!(stat & SAR_TSQE_INVALID));
1534
1535         writel((unsigned long)card->tsq.next - (unsigned long)card->tsq.base,
1536                SAR_REG_TSQH);
1537
1538         XPRINTK("idt77252_tx-after writel%d: TSQ head = 0x%x, tail = 0x%x, next = 0x%p.\n",
1539                 card->index, readl(SAR_REG_TSQH),
1540                 readl(SAR_REG_TSQT), card->tsq.next);
1541 }
1542
1543
1544 static void
1545 tst_timer(unsigned long data)
1546 {
1547         struct idt77252_dev *card = (struct idt77252_dev *)data;
1548         unsigned long base, idle, jump;
1549         unsigned long flags;
1550         u32 pc;
1551         int e;
1552
1553         spin_lock_irqsave(&card->tst_lock, flags);
1554
1555         base = card->tst[card->tst_index];
1556         idle = card->tst[card->tst_index ^ 1];
1557
1558         if (test_bit(TST_SWITCH_WAIT, &card->tst_state)) {
1559                 jump = base + card->tst_size - 2;
1560
1561                 pc = readl(SAR_REG_NOW) >> 2;
1562                 if ((pc ^ idle) & ~(card->tst_size - 1)) {
1563                         mod_timer(&card->tst_timer, jiffies + 1);
1564                         goto out;
1565                 }
1566
1567                 clear_bit(TST_SWITCH_WAIT, &card->tst_state);
1568
1569                 card->tst_index ^= 1;
1570                 write_sram(card, jump, TSTE_OPC_JMP | (base << 2));
1571
1572                 base = card->tst[card->tst_index];
1573                 idle = card->tst[card->tst_index ^ 1];
1574
1575                 for (e = 0; e < card->tst_size - 2; e++) {
1576                         if (card->soft_tst[e].tste & TSTE_PUSH_IDLE) {
1577                                 write_sram(card, idle + e,
1578                                            card->soft_tst[e].tste & TSTE_MASK);
1579                                 card->soft_tst[e].tste &= ~(TSTE_PUSH_IDLE);
1580                         }
1581                 }
1582         }
1583
1584         if (test_and_clear_bit(TST_SWITCH_PENDING, &card->tst_state)) {
1585
1586                 for (e = 0; e < card->tst_size - 2; e++) {
1587                         if (card->soft_tst[e].tste & TSTE_PUSH_ACTIVE) {
1588                                 write_sram(card, idle + e,
1589                                            card->soft_tst[e].tste & TSTE_MASK);
1590                                 card->soft_tst[e].tste &= ~(TSTE_PUSH_ACTIVE);
1591                                 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1592                         }
1593                 }
1594
1595                 jump = base + card->tst_size - 2;
1596
1597                 write_sram(card, jump, TSTE_OPC_NULL);
1598                 set_bit(TST_SWITCH_WAIT, &card->tst_state);
1599
1600                 mod_timer(&card->tst_timer, jiffies + 1);
1601         }
1602
1603 out:
1604         spin_unlock_irqrestore(&card->tst_lock, flags);
1605 }
1606
1607 static int
1608 __fill_tst(struct idt77252_dev *card, struct vc_map *vc,
1609            int n, unsigned int opc)
1610 {
1611         unsigned long cl, avail;
1612         unsigned long idle;
1613         int e, r;
1614         u32 data;
1615
1616         avail = card->tst_size - 2;
1617         for (e = 0; e < avail; e++) {
1618                 if (card->soft_tst[e].vc == NULL)
1619                         break;
1620         }
1621         if (e >= avail) {
1622                 printk("%s: No free TST entries found\n", card->name);
1623                 return -1;
1624         }
1625
1626         NPRINTK("%s: conn %d: first TST entry at %d.\n",
1627                 card->name, vc ? vc->index : -1, e);
1628
1629         r = n;
1630         cl = avail;
1631         data = opc & TSTE_OPC_MASK;
1632         if (vc && (opc != TSTE_OPC_NULL))
1633                 data = opc | vc->index;
1634
1635         idle = card->tst[card->tst_index ^ 1];
1636
1637         /*
1638          * Fill Soft TST.
1639          */
1640         while (r > 0) {
1641                 if ((cl >= avail) && (card->soft_tst[e].vc == NULL)) {
1642                         if (vc)
1643                                 card->soft_tst[e].vc = vc;
1644                         else
1645                                 card->soft_tst[e].vc = (void *)-1;
1646
1647                         card->soft_tst[e].tste = data;
1648                         if (timer_pending(&card->tst_timer))
1649                                 card->soft_tst[e].tste |= TSTE_PUSH_ACTIVE;
1650                         else {
1651                                 write_sram(card, idle + e, data);
1652                                 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1653                         }
1654
1655                         cl -= card->tst_size;
1656                         r--;
1657                 }
1658
1659                 if (++e == avail)
1660                         e = 0;
1661                 cl += n;
1662         }
1663
1664         return 0;
1665 }
1666
1667 static int
1668 fill_tst(struct idt77252_dev *card, struct vc_map *vc, int n, unsigned int opc)
1669 {
1670         unsigned long flags;
1671         int res;
1672
1673         spin_lock_irqsave(&card->tst_lock, flags);
1674
1675         res = __fill_tst(card, vc, n, opc);
1676
1677         set_bit(TST_SWITCH_PENDING, &card->tst_state);
1678         if (!timer_pending(&card->tst_timer))
1679                 mod_timer(&card->tst_timer, jiffies + 1);
1680
1681         spin_unlock_irqrestore(&card->tst_lock, flags);
1682         return res;
1683 }
1684
1685 static int
1686 __clear_tst(struct idt77252_dev *card, struct vc_map *vc)
1687 {
1688         unsigned long idle;
1689         int e;
1690
1691         idle = card->tst[card->tst_index ^ 1];
1692
1693         for (e = 0; e < card->tst_size - 2; e++) {
1694                 if (card->soft_tst[e].vc == vc) {
1695                         card->soft_tst[e].vc = NULL;
1696
1697                         card->soft_tst[e].tste = TSTE_OPC_VAR;
1698                         if (timer_pending(&card->tst_timer))
1699                                 card->soft_tst[e].tste |= TSTE_PUSH_ACTIVE;
1700                         else {
1701                                 write_sram(card, idle + e, TSTE_OPC_VAR);
1702                                 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1703                         }
1704                 }
1705         }
1706
1707         return 0;
1708 }
1709
1710 static int
1711 clear_tst(struct idt77252_dev *card, struct vc_map *vc)
1712 {
1713         unsigned long flags;
1714         int res;
1715
1716         spin_lock_irqsave(&card->tst_lock, flags);
1717
1718         res = __clear_tst(card, vc);
1719
1720         set_bit(TST_SWITCH_PENDING, &card->tst_state);
1721         if (!timer_pending(&card->tst_timer))
1722                 mod_timer(&card->tst_timer, jiffies + 1);
1723
1724         spin_unlock_irqrestore(&card->tst_lock, flags);
1725         return res;
1726 }
1727
1728 static int
1729 change_tst(struct idt77252_dev *card, struct vc_map *vc,
1730            int n, unsigned int opc)
1731 {
1732         unsigned long flags;
1733         int res;
1734
1735         spin_lock_irqsave(&card->tst_lock, flags);
1736
1737         __clear_tst(card, vc);
1738         res = __fill_tst(card, vc, n, opc);
1739
1740         set_bit(TST_SWITCH_PENDING, &card->tst_state);
1741         if (!timer_pending(&card->tst_timer))
1742                 mod_timer(&card->tst_timer, jiffies + 1);
1743
1744         spin_unlock_irqrestore(&card->tst_lock, flags);
1745         return res;
1746 }
1747
1748
1749 static int
1750 set_tct(struct idt77252_dev *card, struct vc_map *vc)
1751 {
1752         unsigned long tct;
1753
1754         tct = (unsigned long) (card->tct_base + vc->index * SAR_SRAM_TCT_SIZE);
1755
1756         switch (vc->class) {
1757         case SCHED_CBR:
1758                 OPRINTK("%s: writing TCT at 0x%lx, SCD 0x%lx.\n",
1759                         card->name, tct, vc->scq->scd);
1760
1761                 write_sram(card, tct + 0, TCT_CBR | vc->scq->scd);
1762                 write_sram(card, tct + 1, 0);
1763                 write_sram(card, tct + 2, 0);
1764                 write_sram(card, tct + 3, 0);
1765                 write_sram(card, tct + 4, 0);
1766                 write_sram(card, tct + 5, 0);
1767                 write_sram(card, tct + 6, 0);
1768                 write_sram(card, tct + 7, 0);
1769                 break;
1770
1771         case SCHED_UBR:
1772                 OPRINTK("%s: writing TCT at 0x%lx, SCD 0x%lx.\n",
1773                         card->name, tct, vc->scq->scd);
1774
1775                 write_sram(card, tct + 0, TCT_UBR | vc->scq->scd);
1776                 write_sram(card, tct + 1, 0);
1777                 write_sram(card, tct + 2, TCT_TSIF);
1778                 write_sram(card, tct + 3, TCT_HALT | TCT_IDLE);
1779                 write_sram(card, tct + 4, 0);
1780                 write_sram(card, tct + 5, vc->init_er);
1781                 write_sram(card, tct + 6, 0);
1782                 write_sram(card, tct + 7, TCT_FLAG_UBR);
1783                 break;
1784
1785         case SCHED_VBR:
1786         case SCHED_ABR:
1787         default:
1788                 return -ENOSYS;
1789         }
1790
1791         return 0;
1792 }
1793
1794 /*****************************************************************************/
1795 /*                                                                           */
1796 /* FBQ Handling                                                              */
1797 /*                                                                           */
1798 /*****************************************************************************/
1799
1800 static __inline__ int
1801 idt77252_fbq_level(struct idt77252_dev *card, int queue)
1802 {
1803         return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) & 0x0f;
1804 }
1805
1806 static __inline__ int
1807 idt77252_fbq_full(struct idt77252_dev *card, int queue)
1808 {
1809         return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) == 0x0f;
1810 }
1811
1812 static int
1813 push_rx_skb(struct idt77252_dev *card, struct sk_buff *skb, int queue)
1814 {
1815         unsigned long flags;
1816         u32 handle;
1817         u32 addr;
1818
1819         skb->data = skb->tail = skb->head;
1820         skb->len = 0;
1821
1822         skb_reserve(skb, 16);
1823
1824         switch (queue) {
1825         case 0:
1826                 skb_put(skb, SAR_FB_SIZE_0);
1827                 break;
1828         case 1:
1829                 skb_put(skb, SAR_FB_SIZE_1);
1830                 break;
1831         case 2:
1832                 skb_put(skb, SAR_FB_SIZE_2);
1833                 break;
1834         case 3:
1835                 skb_put(skb, SAR_FB_SIZE_3);
1836                 break;
1837         default:
1838                 dev_kfree_skb(skb);
1839                 return -1;
1840         }
1841
1842         if (idt77252_fbq_full(card, queue))
1843                 return -1;
1844
1845         memset(&skb->data[(skb->len & ~(0x3f)) - 64], 0, 2 * sizeof(u32));
1846
1847         handle = IDT77252_PRV_POOL(skb);
1848         addr = IDT77252_PRV_PADDR(skb);
1849
1850         spin_lock_irqsave(&card->cmd_lock, flags);
1851         writel(handle, card->fbq[queue]);
1852         writel(addr, card->fbq[queue]);
1853         spin_unlock_irqrestore(&card->cmd_lock, flags);
1854
1855         return 0;
1856 }
1857
1858 static void
1859 add_rx_skb(struct idt77252_dev *card, int queue,
1860            unsigned int size, unsigned int count)
1861 {
1862         struct sk_buff *skb;
1863         dma_addr_t paddr;
1864         u32 handle;
1865
1866         while (count--) {
1867                 skb = dev_alloc_skb(size);
1868                 if (!skb)
1869                         return;
1870
1871                 if (sb_pool_add(card, skb, queue)) {
1872                         printk("%s: SB POOL full\n", __FUNCTION__);
1873                         goto outfree;
1874                 }
1875
1876                 paddr = pci_map_single(card->pcidev, skb->data,
1877                                        skb->end - skb->data,
1878                                        PCI_DMA_FROMDEVICE);
1879                 IDT77252_PRV_PADDR(skb) = paddr;
1880
1881                 if (push_rx_skb(card, skb, queue)) {
1882                         printk("%s: FB QUEUE full\n", __FUNCTION__);
1883                         goto outunmap;
1884                 }
1885         }
1886
1887         return;
1888
1889 outunmap:
1890         pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
1891                          skb->end - skb->data, PCI_DMA_FROMDEVICE);
1892
1893         handle = IDT77252_PRV_POOL(skb);
1894         card->sbpool[POOL_QUEUE(handle)].skb[POOL_INDEX(handle)] = NULL;
1895
1896 outfree:
1897         dev_kfree_skb(skb);
1898 }
1899
1900
1901 static void
1902 recycle_rx_skb(struct idt77252_dev *card, struct sk_buff *skb)
1903 {
1904         u32 handle = IDT77252_PRV_POOL(skb);
1905         int err;
1906
1907         pci_dma_sync_single_for_device(card->pcidev, IDT77252_PRV_PADDR(skb),
1908                                        skb->end - skb->data, PCI_DMA_FROMDEVICE);
1909
1910         err = push_rx_skb(card, skb, POOL_QUEUE(handle));
1911         if (err) {
1912                 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
1913                                  skb->end - skb->data, PCI_DMA_FROMDEVICE);
1914                 sb_pool_remove(card, skb);
1915                 dev_kfree_skb(skb);
1916         }
1917 }
1918
1919 static void
1920 flush_rx_pool(struct idt77252_dev *card, struct rx_pool *rpp)
1921 {
1922         rpp->len = 0;
1923         rpp->count = 0;
1924         rpp->first = NULL;
1925         rpp->last = &rpp->first;
1926 }
1927
1928 static void
1929 recycle_rx_pool_skb(struct idt77252_dev *card, struct rx_pool *rpp)
1930 {
1931         struct sk_buff *skb, *next;
1932         int i;
1933
1934         skb = rpp->first;
1935         for (i = 0; i < rpp->count; i++) {
1936                 next = skb->next;
1937                 skb->next = NULL;
1938                 recycle_rx_skb(card, skb);
1939                 skb = next;
1940         }
1941         flush_rx_pool(card, rpp);
1942 }
1943
1944 /*****************************************************************************/
1945 /*                                                                           */
1946 /* ATM Interface                                                             */
1947 /*                                                                           */
1948 /*****************************************************************************/
1949
1950 static void
1951 idt77252_phy_put(struct atm_dev *dev, unsigned char value, unsigned long addr)
1952 {
1953         write_utility(dev->dev_data, 0x100 + (addr & 0x1ff), value);
1954 }
1955
1956 static unsigned char
1957 idt77252_phy_get(struct atm_dev *dev, unsigned long addr)
1958 {
1959         return read_utility(dev->dev_data, 0x100 + (addr & 0x1ff));
1960 }
1961
1962 static inline int
1963 idt77252_send_skb(struct atm_vcc *vcc, struct sk_buff *skb, int oam)
1964 {
1965         struct atm_dev *dev = vcc->dev;
1966         struct idt77252_dev *card = dev->dev_data;
1967         struct vc_map *vc = vcc->dev_data;
1968         int err;
1969
1970         if (vc == NULL) {
1971                 printk("%s: NULL connection in send().\n", card->name);
1972                 atomic_inc(&vcc->stats->tx_err);
1973                 dev_kfree_skb(skb);
1974                 return -EINVAL;
1975         }
1976         if (!test_bit(VCF_TX, &vc->flags)) {
1977                 printk("%s: Trying to transmit on a non-tx VC.\n", card->name);
1978                 atomic_inc(&vcc->stats->tx_err);
1979                 dev_kfree_skb(skb);
1980                 return -EINVAL;
1981         }
1982
1983         switch (vcc->qos.aal) {
1984         case ATM_AAL0:
1985         case ATM_AAL1:
1986         case ATM_AAL5:
1987                 break;
1988         default:
1989                 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal);
1990                 atomic_inc(&vcc->stats->tx_err);
1991                 dev_kfree_skb(skb);
1992                 return -EINVAL;
1993         }
1994
1995         if (skb_shinfo(skb)->nr_frags != 0) {
1996                 printk("%s: No scatter-gather yet.\n", card->name);
1997                 atomic_inc(&vcc->stats->tx_err);
1998                 dev_kfree_skb(skb);
1999                 return -EINVAL;
2000         }
2001         ATM_SKB(skb)->vcc = vcc;
2002
2003         err = queue_skb(card, vc, skb, oam);
2004         if (err) {
2005                 atomic_inc(&vcc->stats->tx_err);
2006                 dev_kfree_skb(skb);
2007                 return err;
2008         }
2009
2010         return 0;
2011 }
2012
2013 int
2014 idt77252_send(struct atm_vcc *vcc, struct sk_buff *skb)
2015 {
2016         return idt77252_send_skb(vcc, skb, 0);
2017 }
2018
2019 static int
2020 idt77252_send_oam(struct atm_vcc *vcc, void *cell, int flags)
2021 {
2022         struct atm_dev *dev = vcc->dev;
2023         struct idt77252_dev *card = dev->dev_data;
2024         struct sk_buff *skb;
2025
2026         skb = dev_alloc_skb(64);
2027         if (!skb) {
2028                 printk("%s: Out of memory in send_oam().\n", card->name);
2029                 atomic_inc(&vcc->stats->tx_err);
2030                 return -ENOMEM;
2031         }
2032         atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
2033
2034         memcpy(skb_put(skb, 52), cell, 52);
2035
2036         return idt77252_send_skb(vcc, skb, 1);
2037 }
2038
2039 static __inline__ unsigned int
2040 idt77252_fls(unsigned int x)
2041 {
2042         int r = 1;
2043
2044         if (x == 0)
2045                 return 0;
2046         if (x & 0xffff0000) {
2047                 x >>= 16;
2048                 r += 16;
2049         }
2050         if (x & 0xff00) {
2051                 x >>= 8;
2052                 r += 8;
2053         }
2054         if (x & 0xf0) {
2055                 x >>= 4;
2056                 r += 4;
2057         }
2058         if (x & 0xc) {
2059                 x >>= 2;
2060                 r += 2;
2061         }
2062         if (x & 0x2)
2063                 r += 1;
2064         return r;
2065 }
2066
2067 static u16
2068 idt77252_int_to_atmfp(unsigned int rate)
2069 {
2070         u16 m, e;
2071
2072         if (rate == 0)
2073                 return 0;
2074         e = idt77252_fls(rate) - 1;
2075         if (e < 9)
2076                 m = (rate - (1 << e)) << (9 - e);
2077         else if (e == 9)
2078                 m = (rate - (1 << e));
2079         else /* e > 9 */
2080                 m = (rate - (1 << e)) >> (e - 9);
2081         return 0x4000 | (e << 9) | m;
2082 }
2083
2084 static u8
2085 idt77252_rate_logindex(struct idt77252_dev *card, int pcr)
2086 {
2087         u16 afp;
2088
2089         afp = idt77252_int_to_atmfp(pcr < 0 ? -pcr : pcr);
2090         if (pcr < 0)
2091                 return rate_to_log[(afp >> 5) & 0x1ff];
2092         return rate_to_log[((afp >> 5) + 1) & 0x1ff];
2093 }
2094
2095 static void
2096 idt77252_est_timer(unsigned long data)
2097 {
2098         struct vc_map *vc = (struct vc_map *)data;
2099         struct idt77252_dev *card = vc->card;
2100         struct rate_estimator *est;
2101         unsigned long flags;
2102         u32 rate, cps;
2103         u64 ncells;
2104         u8 lacr;
2105
2106         spin_lock_irqsave(&vc->lock, flags);
2107         est = vc->estimator;
2108         if (!est)
2109                 goto out;
2110
2111         ncells = est->cells;
2112
2113         rate = ((u32)(ncells - est->last_cells)) << (7 - est->interval);
2114         est->last_cells = ncells;
2115         est->avcps += ((long)rate - (long)est->avcps) >> est->ewma_log;
2116         est->cps = (est->avcps + 0x1f) >> 5;
2117
2118         cps = est->cps;
2119         if (cps < (est->maxcps >> 4))
2120                 cps = est->maxcps >> 4;
2121
2122         lacr = idt77252_rate_logindex(card, cps);
2123         if (lacr > vc->max_er)
2124                 lacr = vc->max_er;
2125
2126         if (lacr != vc->lacr) {
2127                 vc->lacr = lacr;
2128                 writel(TCMDQ_LACR|(vc->lacr << 16)|vc->index, SAR_REG_TCMDQ);
2129         }
2130
2131         est->timer.expires = jiffies + ((HZ / 4) << est->interval);
2132         add_timer(&est->timer);
2133
2134 out:
2135         spin_unlock_irqrestore(&vc->lock, flags);
2136 }
2137
2138 static struct rate_estimator *
2139 idt77252_init_est(struct vc_map *vc, int pcr)
2140 {
2141         struct rate_estimator *est;
2142
2143         est = kzalloc(sizeof(struct rate_estimator), GFP_KERNEL);
2144         if (!est)
2145                 return NULL;
2146         est->maxcps = pcr < 0 ? -pcr : pcr;
2147         est->cps = est->maxcps;
2148         est->avcps = est->cps << 5;
2149
2150         est->interval = 2;              /* XXX: make this configurable */
2151         est->ewma_log = 2;              /* XXX: make this configurable */
2152         init_timer(&est->timer);
2153         est->timer.data = (unsigned long)vc;
2154         est->timer.function = idt77252_est_timer;
2155
2156         est->timer.expires = jiffies + ((HZ / 4) << est->interval);
2157         add_timer(&est->timer);
2158
2159         return est;
2160 }
2161
2162 static int
2163 idt77252_init_cbr(struct idt77252_dev *card, struct vc_map *vc,
2164                   struct atm_vcc *vcc, struct atm_qos *qos)
2165 {
2166         int tst_free, tst_used, tst_entries;
2167         unsigned long tmpl, modl;
2168         int tcr, tcra;
2169
2170         if ((qos->txtp.max_pcr == 0) &&
2171             (qos->txtp.pcr == 0) && (qos->txtp.min_pcr == 0)) {
2172                 printk("%s: trying to open a CBR VC with cell rate = 0\n",
2173                        card->name);
2174                 return -EINVAL;
2175         }
2176
2177         tst_used = 0;
2178         tst_free = card->tst_free;
2179         if (test_bit(VCF_TX, &vc->flags))
2180                 tst_used = vc->ntste;
2181         tst_free += tst_used;
2182
2183         tcr = atm_pcr_goal(&qos->txtp);
2184         tcra = tcr >= 0 ? tcr : -tcr;
2185
2186         TXPRINTK("%s: CBR target cell rate = %d\n", card->name, tcra);
2187
2188         tmpl = (unsigned long) tcra * ((unsigned long) card->tst_size - 2);
2189         modl = tmpl % (unsigned long)card->utopia_pcr;
2190
2191         tst_entries = (int) (tmpl / card->utopia_pcr);
2192         if (tcr > 0) {
2193                 if (modl > 0)
2194                         tst_entries++;
2195         } else if (tcr == 0) {
2196                 tst_entries = tst_free - SAR_TST_RESERVED;
2197                 if (tst_entries <= 0) {
2198                         printk("%s: no CBR bandwidth free.\n", card->name);
2199                         return -ENOSR;
2200                 }
2201         }
2202
2203         if (tst_entries == 0) {
2204                 printk("%s: selected CBR bandwidth < granularity.\n",
2205                        card->name);
2206                 return -EINVAL;
2207         }
2208
2209         if (tst_entries > (tst_free - SAR_TST_RESERVED)) {
2210                 printk("%s: not enough CBR bandwidth free.\n", card->name);
2211                 return -ENOSR;
2212         }
2213
2214         vc->ntste = tst_entries;
2215
2216         card->tst_free = tst_free - tst_entries;
2217         if (test_bit(VCF_TX, &vc->flags)) {
2218                 if (tst_used == tst_entries)
2219                         return 0;
2220
2221                 OPRINTK("%s: modify %d -> %d entries in TST.\n",
2222                         card->name, tst_used, tst_entries);
2223                 change_tst(card, vc, tst_entries, TSTE_OPC_CBR);
2224                 return 0;
2225         }
2226
2227         OPRINTK("%s: setting %d entries in TST.\n", card->name, tst_entries);
2228         fill_tst(card, vc, tst_entries, TSTE_OPC_CBR);
2229         return 0;
2230 }
2231
2232 static int
2233 idt77252_init_ubr(struct idt77252_dev *card, struct vc_map *vc,
2234                   struct atm_vcc *vcc, struct atm_qos *qos)
2235 {
2236         unsigned long flags;
2237         int tcr;
2238
2239         spin_lock_irqsave(&vc->lock, flags);
2240         if (vc->estimator) {
2241                 del_timer(&vc->estimator->timer);
2242                 kfree(vc->estimator);
2243                 vc->estimator = NULL;
2244         }
2245         spin_unlock_irqrestore(&vc->lock, flags);
2246
2247         tcr = atm_pcr_goal(&qos->txtp);
2248         if (tcr == 0)
2249                 tcr = card->link_pcr;
2250
2251         vc->estimator = idt77252_init_est(vc, tcr);
2252
2253         vc->class = SCHED_UBR;
2254         vc->init_er = idt77252_rate_logindex(card, tcr);
2255         vc->lacr = vc->init_er;
2256         if (tcr < 0)
2257                 vc->max_er = vc->init_er;
2258         else
2259                 vc->max_er = 0xff;
2260
2261         return 0;
2262 }
2263
2264 static int
2265 idt77252_init_tx(struct idt77252_dev *card, struct vc_map *vc,
2266                  struct atm_vcc *vcc, struct atm_qos *qos)
2267 {
2268         int error;
2269
2270         if (test_bit(VCF_TX, &vc->flags))
2271                 return -EBUSY;
2272
2273         switch (qos->txtp.traffic_class) {
2274                 case ATM_CBR:
2275                         vc->class = SCHED_CBR;
2276                         break;
2277
2278                 case ATM_UBR:
2279                         vc->class = SCHED_UBR;
2280                         break;
2281
2282                 case ATM_VBR:
2283                 case ATM_ABR:
2284                 default:
2285                         return -EPROTONOSUPPORT;
2286         }
2287
2288         vc->scq = alloc_scq(card, vc->class);
2289         if (!vc->scq) {
2290                 printk("%s: can't get SCQ.\n", card->name);
2291                 return -ENOMEM;
2292         }
2293
2294         vc->scq->scd = get_free_scd(card, vc);
2295         if (vc->scq->scd == 0) {
2296                 printk("%s: no SCD available.\n", card->name);
2297                 free_scq(card, vc->scq);
2298                 return -ENOMEM;
2299         }
2300
2301         fill_scd(card, vc->scq, vc->class);
2302
2303         if (set_tct(card, vc)) {
2304                 printk("%s: class %d not supported.\n",
2305                        card->name, qos->txtp.traffic_class);
2306
2307                 card->scd2vc[vc->scd_index] = NULL;
2308                 free_scq(card, vc->scq);
2309                 return -EPROTONOSUPPORT;
2310         }
2311
2312         switch (vc->class) {
2313                 case SCHED_CBR:
2314                         error = idt77252_init_cbr(card, vc, vcc, qos);
2315                         if (error) {
2316                                 card->scd2vc[vc->scd_index] = NULL;
2317                                 free_scq(card, vc->scq);
2318                                 return error;
2319                         }
2320
2321                         clear_bit(VCF_IDLE, &vc->flags);
2322                         writel(TCMDQ_START | vc->index, SAR_REG_TCMDQ);
2323                         break;
2324
2325                 case SCHED_UBR:
2326                         error = idt77252_init_ubr(card, vc, vcc, qos);
2327                         if (error) {
2328                                 card->scd2vc[vc->scd_index] = NULL;
2329                                 free_scq(card, vc->scq);
2330                                 return error;
2331                         }
2332
2333                         set_bit(VCF_IDLE, &vc->flags);
2334                         break;
2335         }
2336
2337         vc->tx_vcc = vcc;
2338         set_bit(VCF_TX, &vc->flags);
2339         return 0;
2340 }
2341
2342 static int
2343 idt77252_init_rx(struct idt77252_dev *card, struct vc_map *vc,
2344                  struct atm_vcc *vcc, struct atm_qos *qos)
2345 {
2346         unsigned long flags;
2347         unsigned long addr;
2348         u32 rcte = 0;
2349
2350         if (test_bit(VCF_RX, &vc->flags))
2351                 return -EBUSY;
2352
2353         vc->rx_vcc = vcc;
2354         set_bit(VCF_RX, &vc->flags);
2355
2356         if ((vcc->vci == 3) || (vcc->vci == 4))
2357                 return 0;
2358
2359         flush_rx_pool(card, &vc->rcv.rx_pool);
2360
2361         rcte |= SAR_RCTE_CONNECTOPEN;
2362         rcte |= SAR_RCTE_RAWCELLINTEN;
2363
2364         switch (qos->aal) {
2365                 case ATM_AAL0:
2366                         rcte |= SAR_RCTE_RCQ;
2367                         break;
2368                 case ATM_AAL1:
2369                         rcte |= SAR_RCTE_OAM; /* Let SAR drop Video */
2370                         break;
2371                 case ATM_AAL34:
2372                         rcte |= SAR_RCTE_AAL34;
2373                         break;
2374                 case ATM_AAL5:
2375                         rcte |= SAR_RCTE_AAL5;
2376                         break;
2377                 default:
2378                         rcte |= SAR_RCTE_RCQ;
2379                         break;
2380         }
2381
2382         if (qos->aal != ATM_AAL5)
2383                 rcte |= SAR_RCTE_FBP_1;
2384         else if (qos->rxtp.max_sdu > SAR_FB_SIZE_2)
2385                 rcte |= SAR_RCTE_FBP_3;
2386         else if (qos->rxtp.max_sdu > SAR_FB_SIZE_1)
2387                 rcte |= SAR_RCTE_FBP_2;
2388         else if (qos->rxtp.max_sdu > SAR_FB_SIZE_0)
2389                 rcte |= SAR_RCTE_FBP_1;
2390         else
2391                 rcte |= SAR_RCTE_FBP_01;
2392
2393         addr = card->rct_base + (vc->index << 2);
2394
2395         OPRINTK("%s: writing RCT at 0x%lx\n", card->name, addr);
2396         write_sram(card, addr, rcte);
2397
2398         spin_lock_irqsave(&card->cmd_lock, flags);
2399         writel(SAR_CMD_OPEN_CONNECTION | (addr << 2), SAR_REG_CMD);
2400         waitfor_idle(card);
2401         spin_unlock_irqrestore(&card->cmd_lock, flags);
2402
2403         return 0;
2404 }
2405
2406 static int
2407 idt77252_open(struct atm_vcc *vcc)
2408 {
2409         struct atm_dev *dev = vcc->dev;
2410         struct idt77252_dev *card = dev->dev_data;
2411         struct vc_map *vc;
2412         unsigned int index;
2413         unsigned int inuse;
2414         int error;
2415         int vci = vcc->vci;
2416         short vpi = vcc->vpi;
2417
2418         if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC)
2419                 return 0;
2420
2421         if (vpi >= (1 << card->vpibits)) {
2422                 printk("%s: unsupported VPI: %d\n", card->name, vpi);
2423                 return -EINVAL;
2424         }
2425
2426         if (vci >= (1 << card->vcibits)) {
2427                 printk("%s: unsupported VCI: %d\n", card->name, vci);
2428                 return -EINVAL;
2429         }
2430
2431         set_bit(ATM_VF_ADDR, &vcc->flags);
2432
2433         down(&card->mutex);
2434
2435         OPRINTK("%s: opening vpi.vci: %d.%d\n", card->name, vpi, vci);
2436
2437         switch (vcc->qos.aal) {
2438         case ATM_AAL0:
2439         case ATM_AAL1:
2440         case ATM_AAL5:
2441                 break;
2442         default:
2443                 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal);
2444                 up(&card->mutex);
2445                 return -EPROTONOSUPPORT;
2446         }
2447
2448         index = VPCI2VC(card, vpi, vci);
2449         if (!card->vcs[index]) {
2450                 card->vcs[index] = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2451                 if (!card->vcs[index]) {
2452                         printk("%s: can't alloc vc in open()\n", card->name);
2453                         up(&card->mutex);
2454                         return -ENOMEM;
2455                 }
2456                 card->vcs[index]->card = card;
2457                 card->vcs[index]->index = index;
2458
2459                 spin_lock_init(&card->vcs[index]->lock);
2460         }
2461         vc = card->vcs[index];
2462
2463         vcc->dev_data = vc;
2464
2465         IPRINTK("%s: idt77252_open: vc = %d (%d.%d) %s/%s (max RX SDU: %u)\n",
2466                 card->name, vc->index, vcc->vpi, vcc->vci,
2467                 vcc->qos.rxtp.traffic_class != ATM_NONE ? "rx" : "--",
2468                 vcc->qos.txtp.traffic_class != ATM_NONE ? "tx" : "--",
2469                 vcc->qos.rxtp.max_sdu);
2470
2471         inuse = 0;
2472         if (vcc->qos.txtp.traffic_class != ATM_NONE &&
2473             test_bit(VCF_TX, &vc->flags))
2474                 inuse = 1;
2475         if (vcc->qos.rxtp.traffic_class != ATM_NONE &&
2476             test_bit(VCF_RX, &vc->flags))
2477                 inuse += 2;
2478
2479         if (inuse) {
2480                 printk("%s: %s vci already in use.\n", card->name,
2481                        inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx");
2482                 up(&card->mutex);
2483                 return -EADDRINUSE;
2484         }
2485
2486         if (vcc->qos.txtp.traffic_class != ATM_NONE) {
2487                 error = idt77252_init_tx(card, vc, vcc, &vcc->qos);
2488                 if (error) {
2489                         up(&card->mutex);
2490                         return error;
2491                 }
2492         }
2493
2494         if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
2495                 error = idt77252_init_rx(card, vc, vcc, &vcc->qos);
2496                 if (error) {
2497                         up(&card->mutex);
2498                         return error;
2499                 }
2500         }
2501
2502         set_bit(ATM_VF_READY, &vcc->flags);
2503
2504         up(&card->mutex);
2505         return 0;
2506 }
2507
2508 static void
2509 idt77252_close(struct atm_vcc *vcc)
2510 {
2511         struct atm_dev *dev = vcc->dev;
2512         struct idt77252_dev *card = dev->dev_data;
2513         struct vc_map *vc = vcc->dev_data;
2514         unsigned long flags;
2515         unsigned long addr;
2516         unsigned long timeout;
2517
2518         down(&card->mutex);
2519
2520         IPRINTK("%s: idt77252_close: vc = %d (%d.%d)\n",
2521                 card->name, vc->index, vcc->vpi, vcc->vci);
2522
2523         clear_bit(ATM_VF_READY, &vcc->flags);
2524
2525         if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
2526
2527                 spin_lock_irqsave(&vc->lock, flags);
2528                 clear_bit(VCF_RX, &vc->flags);
2529                 vc->rx_vcc = NULL;
2530                 spin_unlock_irqrestore(&vc->lock, flags);
2531
2532                 if ((vcc->vci == 3) || (vcc->vci == 4))
2533                         goto done;
2534
2535                 addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE;
2536
2537                 spin_lock_irqsave(&card->cmd_lock, flags);
2538                 writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2), SAR_REG_CMD);
2539                 waitfor_idle(card);
2540                 spin_unlock_irqrestore(&card->cmd_lock, flags);
2541
2542                 if (vc->rcv.rx_pool.count) {
2543                         DPRINTK("%s: closing a VC with pending rx buffers.\n",
2544                                 card->name);
2545
2546                         recycle_rx_pool_skb(card, &vc->rcv.rx_pool);
2547                 }
2548         }
2549
2550 done:
2551         if (vcc->qos.txtp.traffic_class != ATM_NONE) {
2552
2553                 spin_lock_irqsave(&vc->lock, flags);
2554                 clear_bit(VCF_TX, &vc->flags);
2555                 clear_bit(VCF_IDLE, &vc->flags);
2556                 clear_bit(VCF_RSV, &vc->flags);
2557                 vc->tx_vcc = NULL;
2558
2559                 if (vc->estimator) {
2560                         del_timer(&vc->estimator->timer);
2561                         kfree(vc->estimator);
2562                         vc->estimator = NULL;
2563                 }
2564                 spin_unlock_irqrestore(&vc->lock, flags);
2565
2566                 timeout = 5 * 1000;
2567                 while (atomic_read(&vc->scq->used) > 0) {
2568                         timeout = msleep_interruptible(timeout);
2569                         if (!timeout)
2570                                 break;
2571                 }
2572                 if (!timeout)
2573                         printk("%s: SCQ drain timeout: %u used\n",
2574                                card->name, atomic_read(&vc->scq->used));
2575
2576                 writel(TCMDQ_HALT | vc->index, SAR_REG_TCMDQ);
2577                 clear_scd(card, vc->scq, vc->class);
2578
2579                 if (vc->class == SCHED_CBR) {
2580                         clear_tst(card, vc);
2581                         card->tst_free += vc->ntste;
2582                         vc->ntste = 0;
2583                 }
2584
2585                 card->scd2vc[vc->scd_index] = NULL;
2586                 free_scq(card, vc->scq);
2587         }
2588
2589         up(&card->mutex);
2590 }
2591
2592 static int
2593 idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos, int flags)
2594 {
2595         struct atm_dev *dev = vcc->dev;
2596         struct idt77252_dev *card = dev->dev_data;
2597         struct vc_map *vc = vcc->dev_data;
2598         int error = 0;
2599
2600         down(&card->mutex);
2601
2602         if (qos->txtp.traffic_class != ATM_NONE) {
2603                 if (!test_bit(VCF_TX, &vc->flags)) {
2604                         error = idt77252_init_tx(card, vc, vcc, qos);
2605                         if (error)
2606                                 goto out;
2607                 } else {
2608                         switch (qos->txtp.traffic_class) {
2609                         case ATM_CBR:
2610                                 error = idt77252_init_cbr(card, vc, vcc, qos);
2611                                 if (error)
2612                                         goto out;
2613                                 break;
2614
2615                         case ATM_UBR:
2616                                 error = idt77252_init_ubr(card, vc, vcc, qos);
2617                                 if (error)
2618                                         goto out;
2619
2620                                 if (!test_bit(VCF_IDLE, &vc->flags)) {
2621                                         writel(TCMDQ_LACR | (vc->lacr << 16) |
2622                                                vc->index, SAR_REG_TCMDQ);
2623                                 }
2624                                 break;
2625
2626                         case ATM_VBR:
2627                         case ATM_ABR:
2628                                 error = -EOPNOTSUPP;
2629                                 goto out;
2630                         }
2631                 }
2632         }
2633
2634         if ((qos->rxtp.traffic_class != ATM_NONE) &&
2635             !test_bit(VCF_RX, &vc->flags)) {
2636                 error = idt77252_init_rx(card, vc, vcc, qos);
2637                 if (error)
2638                         goto out;
2639         }
2640
2641         memcpy(&vcc->qos, qos, sizeof(struct atm_qos));
2642
2643         set_bit(ATM_VF_HASQOS, &vcc->flags);
2644
2645 out:
2646         up(&card->mutex);
2647         return error;
2648 }
2649
2650 static int
2651 idt77252_proc_read(struct atm_dev *dev, loff_t * pos, char *page)
2652 {
2653         struct idt77252_dev *card = dev->dev_data;
2654         int i, left;
2655
2656         left = (int) *pos;
2657         if (!left--)
2658                 return sprintf(page, "IDT77252 Interrupts:\n");
2659         if (!left--)
2660                 return sprintf(page, "TSIF:  %lu\n", card->irqstat[15]);
2661         if (!left--)
2662                 return sprintf(page, "TXICP: %lu\n", card->irqstat[14]);
2663         if (!left--)
2664                 return sprintf(page, "TSQF:  %lu\n", card->irqstat[12]);
2665         if (!left--)
2666                 return sprintf(page, "TMROF: %lu\n", card->irqstat[11]);
2667         if (!left--)
2668                 return sprintf(page, "PHYI:  %lu\n", card->irqstat[10]);
2669         if (!left--)
2670                 return sprintf(page, "FBQ3A: %lu\n", card->irqstat[8]);
2671         if (!left--)
2672                 return sprintf(page, "FBQ2A: %lu\n", card->irqstat[7]);
2673         if (!left--)
2674                 return sprintf(page, "RSQF:  %lu\n", card->irqstat[6]);
2675         if (!left--)
2676                 return sprintf(page, "EPDU:  %lu\n", card->irqstat[5]);
2677         if (!left--)
2678                 return sprintf(page, "RAWCF: %lu\n", card->irqstat[4]);
2679         if (!left--)
2680                 return sprintf(page, "FBQ1A: %lu\n", card->irqstat[3]);
2681         if (!left--)
2682                 return sprintf(page, "FBQ0A: %lu\n", card->irqstat[2]);
2683         if (!left--)
2684                 return sprintf(page, "RSQAF: %lu\n", card->irqstat[1]);
2685         if (!left--)
2686                 return sprintf(page, "IDT77252 Transmit Connection Table:\n");
2687
2688         for (i = 0; i < card->tct_size; i++) {
2689                 unsigned long tct;
2690                 struct atm_vcc *vcc;
2691                 struct vc_map *vc;
2692                 char *p;
2693
2694                 vc = card->vcs[i];
2695                 if (!vc)
2696                         continue;
2697
2698                 vcc = NULL;
2699                 if (vc->tx_vcc)
2700                         vcc = vc->tx_vcc;
2701                 if (!vcc)
2702                         continue;
2703                 if (left--)
2704                         continue;
2705
2706                 p = page;
2707                 p += sprintf(p, "  %4u: %u.%u: ", i, vcc->vpi, vcc->vci);
2708                 tct = (unsigned long) (card->tct_base + i * SAR_SRAM_TCT_SIZE);
2709
2710                 for (i = 0; i < 8; i++)
2711                         p += sprintf(p, " %08x", read_sram(card, tct + i));
2712                 p += sprintf(p, "\n");
2713                 return p - page;
2714         }
2715         return 0;
2716 }
2717
2718 /*****************************************************************************/
2719 /*                                                                           */
2720 /* Interrupt handler                                                         */
2721 /*                                                                           */
2722 /*****************************************************************************/
2723
2724 static void
2725 idt77252_collect_stat(struct idt77252_dev *card)
2726 {
2727         u32 cdc, vpec, icc;
2728
2729         cdc = readl(SAR_REG_CDC);
2730         vpec = readl(SAR_REG_VPEC);
2731         icc = readl(SAR_REG_ICC);
2732
2733 #ifdef  NOTDEF
2734         printk("%s:", card->name);
2735
2736         if (cdc & 0x7f0000) {
2737                 char *s = "";
2738
2739                 printk(" [");
2740                 if (cdc & (1 << 22)) {
2741                         printk("%sRM ID", s);
2742                         s = " | ";
2743                 }
2744                 if (cdc & (1 << 21)) {
2745                         printk("%sCON TAB", s);
2746                         s = " | ";
2747                 }
2748                 if (cdc & (1 << 20)) {
2749                         printk("%sNO FB", s);
2750                         s = " | ";
2751                 }
2752                 if (cdc & (1 << 19)) {
2753                         printk("%sOAM CRC", s);
2754                         s = " | ";
2755                 }
2756                 if (cdc & (1 << 18)) {
2757                         printk("%sRM CRC", s);
2758                         s = " | ";
2759                 }
2760                 if (cdc & (1 << 17)) {
2761                         printk("%sRM FIFO", s);
2762                         s = " | ";
2763                 }
2764                 if (cdc & (1 << 16)) {
2765                         printk("%sRX FIFO", s);
2766                         s = " | ";
2767                 }
2768                 printk("]");
2769         }
2770
2771         printk(" CDC %04x, VPEC %04x, ICC: %04x\n",
2772                cdc & 0xffff, vpec & 0xffff, icc & 0xffff);
2773 #endif
2774 }
2775
2776 static irqreturn_t
2777 idt77252_interrupt(int irq, void *dev_id)
2778 {
2779         struct idt77252_dev *card = dev_id;
2780         u32 stat;
2781
2782         stat = readl(SAR_REG_STAT) & 0xffff;
2783         if (!stat)      /* no interrupt for us */
2784                 return IRQ_NONE;
2785
2786         if (test_and_set_bit(IDT77252_BIT_INTERRUPT, &card->flags)) {
2787                 printk("%s: Re-entering irq_handler()\n", card->name);
2788                 goto out;
2789         }
2790
2791         writel(stat, SAR_REG_STAT);     /* reset interrupt */
2792
2793         if (stat & SAR_STAT_TSIF) {     /* entry written to TSQ  */
2794                 INTPRINTK("%s: TSIF\n", card->name);
2795                 card->irqstat[15]++;
2796                 idt77252_tx(card);
2797         }
2798         if (stat & SAR_STAT_TXICP) {    /* Incomplete CS-PDU has  */
2799                 INTPRINTK("%s: TXICP\n", card->name);
2800                 card->irqstat[14]++;
2801 #ifdef CONFIG_ATM_IDT77252_DEBUG
2802                 idt77252_tx_dump(card);
2803 #endif
2804         }
2805         if (stat & SAR_STAT_TSQF) {     /* TSQ 7/8 full           */
2806                 INTPRINTK("%s: TSQF\n", card->name);
2807                 card->irqstat[12]++;
2808                 idt77252_tx(card);
2809         }
2810         if (stat & SAR_STAT_TMROF) {    /* Timer overflow         */
2811                 INTPRINTK("%s: TMROF\n", card->name);
2812                 card->irqstat[11]++;
2813                 idt77252_collect_stat(card);
2814         }
2815
2816         if (stat & SAR_STAT_EPDU) {     /* Got complete CS-PDU    */
2817                 INTPRINTK("%s: EPDU\n", card->name);
2818                 card->irqstat[5]++;
2819                 idt77252_rx(card);
2820         }
2821         if (stat & SAR_STAT_RSQAF) {    /* RSQ is 7/8 full        */
2822                 INTPRINTK("%s: RSQAF\n", card->name);
2823                 card->irqstat[1]++;
2824                 idt77252_rx(card);
2825         }
2826         if (stat & SAR_STAT_RSQF) {     /* RSQ is full            */
2827                 INTPRINTK("%s: RSQF\n", card->name);
2828                 card->irqstat[6]++;
2829                 idt77252_rx(card);
2830         }
2831         if (stat & SAR_STAT_RAWCF) {    /* Raw cell received      */
2832                 INTPRINTK("%s: RAWCF\n", card->name);
2833                 card->irqstat[4]++;
2834                 idt77252_rx_raw(card);
2835         }
2836
2837         if (stat & SAR_STAT_PHYI) {     /* PHY device interrupt   */
2838                 INTPRINTK("%s: PHYI", card->name);
2839                 card->irqstat[10]++;
2840                 if (card->atmdev->phy && card->atmdev->phy->interrupt)
2841                         card->atmdev->phy->interrupt(card->atmdev);
2842         }
2843
2844         if (stat & (SAR_STAT_FBQ0A | SAR_STAT_FBQ1A |
2845                     SAR_STAT_FBQ2A | SAR_STAT_FBQ3A)) {
2846
2847                 writel(readl(SAR_REG_CFG) & ~(SAR_CFG_FBIE), SAR_REG_CFG);
2848
2849                 INTPRINTK("%s: FBQA: %04x\n", card->name, stat);
2850
2851                 if (stat & SAR_STAT_FBQ0A)
2852                         card->irqstat[2]++;
2853                 if (stat & SAR_STAT_FBQ1A)
2854                         card->irqstat[3]++;
2855                 if (stat & SAR_STAT_FBQ2A)
2856                         card->irqstat[7]++;
2857                 if (stat & SAR_STAT_FBQ3A)
2858                         card->irqstat[8]++;
2859
2860                 schedule_work(&card->tqueue);
2861         }
2862
2863 out:
2864         clear_bit(IDT77252_BIT_INTERRUPT, &card->flags);
2865         return IRQ_HANDLED;
2866 }
2867
2868 static void
2869 idt77252_softint(void *dev_id)
2870 {
2871         struct idt77252_dev *card = dev_id;
2872         u32 stat;
2873         int done;
2874
2875         for (done = 1; ; done = 1) {
2876                 stat = readl(SAR_REG_STAT) >> 16;
2877
2878                 if ((stat & 0x0f) < SAR_FBQ0_HIGH) {
2879                         add_rx_skb(card, 0, SAR_FB_SIZE_0, 32);
2880                         done = 0;
2881                 }
2882
2883                 stat >>= 4;
2884                 if ((stat & 0x0f) < SAR_FBQ1_HIGH) {
2885                         add_rx_skb(card, 1, SAR_FB_SIZE_1, 32);
2886                         done = 0;
2887                 }
2888
2889                 stat >>= 4;
2890                 if ((stat & 0x0f) < SAR_FBQ2_HIGH) {
2891                         add_rx_skb(card, 2, SAR_FB_SIZE_2, 32);
2892                         done = 0;
2893                 }
2894
2895                 stat >>= 4;
2896                 if ((stat & 0x0f) < SAR_FBQ3_HIGH) {
2897                         add_rx_skb(card, 3, SAR_FB_SIZE_3, 32);
2898                         done = 0;
2899                 }
2900
2901                 if (done)
2902                         break;
2903         }
2904
2905         writel(readl(SAR_REG_CFG) | SAR_CFG_FBIE, SAR_REG_CFG);
2906 }
2907
2908
2909 static int
2910 open_card_oam(struct idt77252_dev *card)
2911 {
2912         unsigned long flags;
2913         unsigned long addr;
2914         struct vc_map *vc;
2915         int vpi, vci;
2916         int index;
2917         u32 rcte;
2918
2919         for (vpi = 0; vpi < (1 << card->vpibits); vpi++) {
2920                 for (vci = 3; vci < 5; vci++) {
2921                         index = VPCI2VC(card, vpi, vci);
2922
2923                         vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2924                         if (!vc) {
2925                                 printk("%s: can't alloc vc\n", card->name);
2926                                 return -ENOMEM;
2927                         }
2928                         vc->index = index;
2929                         card->vcs[index] = vc;
2930
2931                         flush_rx_pool(card, &vc->rcv.rx_pool);
2932
2933                         rcte = SAR_RCTE_CONNECTOPEN |
2934                                SAR_RCTE_RAWCELLINTEN |
2935                                SAR_RCTE_RCQ |
2936                                SAR_RCTE_FBP_1;
2937
2938                         addr = card->rct_base + (vc->index << 2);
2939                         write_sram(card, addr, rcte);
2940
2941                         spin_lock_irqsave(&card->cmd_lock, flags);
2942                         writel(SAR_CMD_OPEN_CONNECTION | (addr << 2),
2943                                SAR_REG_CMD);
2944                         waitfor_idle(card);
2945                         spin_unlock_irqrestore(&card->cmd_lock, flags);
2946                 }
2947         }
2948
2949         return 0;
2950 }
2951
2952 static void
2953 close_card_oam(struct idt77252_dev *card)
2954 {
2955         unsigned long flags;
2956         unsigned long addr;
2957         struct vc_map *vc;
2958         int vpi, vci;
2959         int index;
2960
2961         for (vpi = 0; vpi < (1 << card->vpibits); vpi++) {
2962                 for (vci = 3; vci < 5; vci++) {
2963                         index = VPCI2VC(card, vpi, vci);
2964                         vc = card->vcs[index];
2965
2966                         addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE;
2967
2968                         spin_lock_irqsave(&card->cmd_lock, flags);
2969                         writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2),
2970                                SAR_REG_CMD);
2971                         waitfor_idle(card);
2972                         spin_unlock_irqrestore(&card->cmd_lock, flags);
2973
2974                         if (vc->rcv.rx_pool.count) {
2975                                 DPRINTK("%s: closing a VC "
2976                                         "with pending rx buffers.\n",
2977                                         card->name);
2978
2979                                 recycle_rx_pool_skb(card, &vc->rcv.rx_pool);
2980                         }
2981                 }
2982         }
2983 }
2984
2985 static int
2986 open_card_ubr0(struct idt77252_dev *card)
2987 {
2988         struct vc_map *vc;
2989
2990         vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2991         if (!vc) {
2992                 printk("%s: can't alloc vc\n", card->name);
2993                 return -ENOMEM;
2994         }
2995         card->vcs[0] = vc;
2996         vc->class = SCHED_UBR0;
2997
2998         vc->scq = alloc_scq(card, vc->class);
2999         if (!vc->scq) {
3000                 printk("%s: can't get SCQ.\n", card->name);
3001                 return -ENOMEM;
3002         }
3003
3004         card->scd2vc[0] = vc;
3005         vc->scd_index = 0;
3006         vc->scq->scd = card->scd_base;
3007
3008         fill_scd(card, vc->scq, vc->class);
3009
3010         write_sram(card, card->tct_base + 0, TCT_UBR | card->scd_base);
3011         write_sram(card, card->tct_base + 1, 0);
3012         write_sram(card, card->tct_base + 2, 0);
3013         write_sram(card, card->tct_base + 3, 0);
3014         write_sram(card, card->tct_base + 4, 0);
3015         write_sram(card, card->tct_base + 5, 0);
3016         write_sram(card, card->tct_base + 6, 0);
3017         write_sram(card, card->tct_base + 7, TCT_FLAG_UBR);
3018
3019         clear_bit(VCF_IDLE, &vc->flags);
3020         writel(TCMDQ_START | 0, SAR_REG_TCMDQ);
3021         return 0;
3022 }
3023
3024 static int
3025 idt77252_dev_open(struct idt77252_dev *card)
3026 {
3027         u32 conf;
3028
3029         if (!test_bit(IDT77252_BIT_INIT, &card->flags)) {
3030                 printk("%s: SAR not yet initialized.\n", card->name);
3031                 return -1;
3032         }
3033
3034         conf = SAR_CFG_RXPTH|   /* enable receive path                  */
3035             SAR_RX_DELAY |      /* interrupt on complete PDU            */
3036             SAR_CFG_RAWIE |     /* interrupt enable on raw cells        */
3037             SAR_CFG_RQFIE |     /* interrupt on RSQ almost full         */
3038             SAR_CFG_TMOIE |     /* interrupt on timer overflow          */
3039             SAR_CFG_FBIE |      /* interrupt on low free buffers        */
3040             SAR_CFG_TXEN |      /* transmit operation enable            */
3041             SAR_CFG_TXINT |     /* interrupt on transmit status         */
3042             SAR_CFG_TXUIE |     /* interrupt on transmit underrun       */
3043             SAR_CFG_TXSFI |     /* interrupt on TSQ almost full         */
3044             SAR_CFG_PHYIE       /* enable PHY interrupts                */
3045             ;
3046
3047 #ifdef CONFIG_ATM_IDT77252_RCV_ALL
3048         /* Test RAW cell receive. */
3049         conf |= SAR_CFG_VPECA;
3050 #endif
3051
3052         writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG);
3053
3054         if (open_card_oam(card)) {
3055                 printk("%s: Error initializing OAM.\n", card->name);
3056                 return -1;
3057         }
3058
3059         if (open_card_ubr0(card)) {
3060                 printk("%s: Error initializing UBR0.\n", card->name);
3061                 return -1;
3062         }
3063
3064         IPRINTK("%s: opened IDT77252 ABR SAR.\n", card->name);
3065         return 0;
3066 }
3067
3068 void
3069 idt77252_dev_close(struct atm_dev *dev)
3070 {
3071         struct idt77252_dev *card = dev->dev_data;
3072         u32 conf;
3073
3074         close_card_oam(card);
3075
3076         conf = SAR_CFG_RXPTH |  /* enable receive path           */
3077             SAR_RX_DELAY |      /* interrupt on complete PDU     */
3078             SAR_CFG_RAWIE |     /* interrupt enable on raw cells */
3079             SAR_CFG_RQFIE |     /* interrupt on RSQ almost full  */
3080             SAR_CFG_TMOIE |     /* interrupt on timer overflow   */
3081             SAR_CFG_FBIE |      /* interrupt on low free buffers */
3082             SAR_CFG_TXEN |      /* transmit operation enable     */
3083             SAR_CFG_TXINT |     /* interrupt on transmit status  */
3084             SAR_CFG_TXUIE |     /* interrupt on xmit underrun    */
3085             SAR_CFG_TXSFI       /* interrupt on TSQ almost full  */
3086             ;
3087
3088         writel(readl(SAR_REG_CFG) & ~(conf), SAR_REG_CFG);
3089
3090         DIPRINTK("%s: closed IDT77252 ABR SAR.\n", card->name);
3091 }
3092
3093
3094 /*****************************************************************************/
3095 /*                                                                           */
3096 /* Initialisation and Deinitialization of IDT77252                           */
3097 /*                                                                           */
3098 /*****************************************************************************/
3099
3100
3101 static void
3102 deinit_card(struct idt77252_dev *card)
3103 {
3104         struct sk_buff *skb;
3105         int i, j;
3106
3107         if (!test_bit(IDT77252_BIT_INIT, &card->flags)) {
3108                 printk("%s: SAR not yet initialized.\n", card->name);
3109                 return;
3110         }
3111         DIPRINTK("idt77252: deinitialize card %u\n", card->index);
3112
3113         writel(0, SAR_REG_CFG);
3114
3115         if (card->atmdev)
3116                 atm_dev_deregister(card->atmdev);
3117
3118         for (i = 0; i < 4; i++) {
3119                 for (j = 0; j < FBQ_SIZE; j++) {
3120                         skb = card->sbpool[i].skb[j];
3121                         if (skb) {
3122                                 pci_unmap_single(card->pcidev,
3123                                                  IDT77252_PRV_PADDR(skb),
3124                                                  skb->end - skb->data,
3125                                                  PCI_DMA_FROMDEVICE);
3126                                 card->sbpool[i].skb[j] = NULL;
3127                                 dev_kfree_skb(skb);
3128                         }
3129                 }
3130         }
3131
3132         vfree(card->soft_tst);
3133
3134         vfree(card->scd2vc);
3135
3136         vfree(card->vcs);
3137
3138         if (card->raw_cell_hnd) {
3139                 pci_free_consistent(card->pcidev, 2 * sizeof(u32),
3140                                     card->raw_cell_hnd, card->raw_cell_paddr);
3141         }
3142
3143         if (card->rsq.base) {
3144                 DIPRINTK("%s: Release RSQ ...\n", card->name);
3145                 deinit_rsq(card);
3146         }
3147
3148         if (card->tsq.base) {
3149                 DIPRINTK("%s: Release TSQ ...\n", card->name);
3150                 deinit_tsq(card);
3151         }
3152
3153         DIPRINTK("idt77252: Release IRQ.\n");
3154         free_irq(card->pcidev->irq, card);
3155
3156         for (i = 0; i < 4; i++) {
3157                 if (card->fbq[i])
3158                         iounmap(card->fbq[i]);
3159         }
3160
3161         if (card->membase)
3162                 iounmap(card->membase);
3163
3164         clear_bit(IDT77252_BIT_INIT, &card->flags);
3165         DIPRINTK("%s: Card deinitialized.\n", card->name);
3166 }
3167
3168
3169 static int __devinit
3170 init_sram(struct idt77252_dev *card)
3171 {
3172         int i;
3173
3174         for (i = 0; i < card->sramsize; i += 4)
3175                 write_sram(card, (i >> 2), 0);
3176
3177         /* set SRAM layout for THIS card */
3178         if (card->sramsize == (512 * 1024)) {
3179                 card->tct_base = SAR_SRAM_TCT_128_BASE;
3180                 card->tct_size = (SAR_SRAM_TCT_128_TOP - card->tct_base + 1)
3181                     / SAR_SRAM_TCT_SIZE;
3182                 card->rct_base = SAR_SRAM_RCT_128_BASE;
3183                 card->rct_size = (SAR_SRAM_RCT_128_TOP - card->rct_base + 1)
3184                     / SAR_SRAM_RCT_SIZE;
3185                 card->rt_base = SAR_SRAM_RT_128_BASE;
3186                 card->scd_base = SAR_SRAM_SCD_128_BASE;
3187                 card->scd_size = (SAR_SRAM_SCD_128_TOP - card->scd_base + 1)
3188                     / SAR_SRAM_SCD_SIZE;
3189                 card->tst[0] = SAR_SRAM_TST1_128_BASE;
3190                 card->tst[1] = SAR_SRAM_TST2_128_BASE;
3191                 card->tst_size = SAR_SRAM_TST1_128_TOP - card->tst[0] + 1;
3192                 card->abrst_base = SAR_SRAM_ABRSTD_128_BASE;
3193                 card->abrst_size = SAR_ABRSTD_SIZE_8K;
3194                 card->fifo_base = SAR_SRAM_FIFO_128_BASE;
3195                 card->fifo_size = SAR_RXFD_SIZE_32K;
3196         } else {
3197                 card->tct_base = SAR_SRAM_TCT_32_BASE;
3198                 card->tct_size = (SAR_SRAM_TCT_32_TOP - card->tct_base + 1)
3199                     / SAR_SRAM_TCT_SIZE;
3200                 card->rct_base = SAR_SRAM_RCT_32_BASE;
3201                 card->rct_size = (SAR_SRAM_RCT_32_TOP - card->rct_base + 1)
3202                     / SAR_SRAM_RCT_SIZE;
3203                 card->rt_base = SAR_SRAM_RT_32_BASE;
3204                 card->scd_base = SAR_SRAM_SCD_32_BASE;
3205                 card->scd_size = (SAR_SRAM_SCD_32_TOP - card->scd_base + 1)
3206                     / SAR_SRAM_SCD_SIZE;
3207                 card->tst[0] = SAR_SRAM_TST1_32_BASE;
3208                 card->tst[1] = SAR_SRAM_TST2_32_BASE;
3209                 card->tst_size = (SAR_SRAM_TST1_32_TOP - card->tst[0] + 1);
3210                 card->abrst_base = SAR_SRAM_ABRSTD_32_BASE;
3211                 card->abrst_size = SAR_ABRSTD_SIZE_1K;
3212                 card->fifo_base = SAR_SRAM_FIFO_32_BASE;
3213                 card->fifo_size = SAR_RXFD_SIZE_4K;
3214         }
3215
3216         /* Initialize TCT */
3217         for (i = 0; i < card->tct_size; i++) {
3218                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 0, 0);
3219                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 1, 0);
3220                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 2, 0);
3221                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 3, 0);
3222                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 4, 0);
3223                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 5, 0);
3224                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 6, 0);
3225                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 7, 0);
3226         }
3227
3228         /* Initialize RCT */
3229         for (i = 0; i < card->rct_size; i++) {
3230                 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE,
3231                                     (u32) SAR_RCTE_RAWCELLINTEN);
3232                 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 1,
3233                                     (u32) 0);
3234                 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 2,
3235                                     (u32) 0);
3236                 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 3,
3237                                     (u32) 0xffffffff);
3238         }
3239
3240         writel((SAR_FBQ0_LOW << 28) | 0x00000000 | 0x00000000 |
3241                (SAR_FB_SIZE_0 / 48), SAR_REG_FBQS0);
3242         writel((SAR_FBQ1_LOW << 28) | 0x00000000 | 0x00000000 |
3243                (SAR_FB_SIZE_1 / 48), SAR_REG_FBQS1);
3244         writel((SAR_FBQ2_LOW << 28) | 0x00000000 | 0x00000000 |
3245                (SAR_FB_SIZE_2 / 48), SAR_REG_FBQS2);
3246         writel((SAR_FBQ3_LOW << 28) | 0x00000000 | 0x00000000 |
3247                (SAR_FB_SIZE_3 / 48), SAR_REG_FBQS3);
3248
3249         /* Initialize rate table  */
3250         for (i = 0; i < 256; i++) {
3251                 write_sram(card, card->rt_base + i, log_to_rate[i]);
3252         }
3253
3254         for (i = 0; i < 128; i++) {
3255                 unsigned int tmp;
3256
3257                 tmp  = rate_to_log[(i << 2) + 0] << 0;
3258                 tmp |= rate_to_log[(i << 2) + 1] << 8;
3259                 tmp |= rate_to_log[(i << 2) + 2] << 16;
3260                 tmp |= rate_to_log[(i << 2) + 3] << 24;
3261                 write_sram(card, card->rt_base + 256 + i, tmp);
3262         }
3263
3264 #if 0 /* Fill RDF and AIR tables. */
3265         for (i = 0; i < 128; i++) {
3266                 unsigned int tmp;
3267
3268                 tmp = RDF[0][(i << 1) + 0] << 16;
3269                 tmp |= RDF[0][(i << 1) + 1] << 0;
3270                 write_sram(card, card->rt_base + 512 + i, tmp);
3271         }
3272
3273         for (i = 0; i < 128; i++) {
3274                 unsigned int tmp;
3275
3276                 tmp = AIR[0][(i << 1) + 0] << 16;
3277                 tmp |= AIR[0][(i << 1) + 1] << 0;
3278                 write_sram(card, card->rt_base + 640 + i, tmp);
3279         }
3280 #endif
3281
3282         IPRINTK("%s: initialize rate table ...\n", card->name);
3283         writel(card->rt_base << 2, SAR_REG_RTBL);
3284
3285         /* Initialize TSTs */
3286         IPRINTK("%s: initialize TST ...\n", card->name);
3287         card->tst_free = card->tst_size - 2;    /* last two are jumps */
3288
3289         for (i = card->tst[0]; i < card->tst[0] + card->tst_size - 2; i++)
3290                 write_sram(card, i, TSTE_OPC_VAR);
3291         write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2));
3292         idt77252_sram_write_errors = 1;
3293         write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2));
3294         idt77252_sram_write_errors = 0;
3295         for (i = card->tst[1]; i < card->tst[1] + card->tst_size - 2; i++)
3296                 write_sram(card, i, TSTE_OPC_VAR);
3297         write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2));
3298         idt77252_sram_write_errors = 1;
3299         write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2));
3300         idt77252_sram_write_errors = 0;
3301
3302         card->tst_index = 0;
3303         writel(card->tst[0] << 2, SAR_REG_TSTB);
3304
3305         /* Initialize ABRSTD and Receive FIFO */
3306         IPRINTK("%s: initialize ABRSTD ...\n", card->name);
3307         writel(card->abrst_size | (card->abrst_base << 2),
3308                SAR_REG_ABRSTD);
3309
3310         IPRINTK("%s: initialize receive fifo ...\n", card->name);
3311         writel(card->fifo_size | (card->fifo_base << 2),
3312                SAR_REG_RXFD);
3313
3314         IPRINTK("%s: SRAM initialization complete.\n", card->name);
3315         return 0;
3316 }
3317
3318 static int __devinit
3319 init_card(struct atm_dev *dev)
3320 {
3321         struct idt77252_dev *card = dev->dev_data;
3322         struct pci_dev *pcidev = card->pcidev;
3323         unsigned long tmpl, modl;
3324         unsigned int linkrate, rsvdcr;
3325         unsigned int tst_entries;
3326         struct net_device *tmp;
3327         char tname[10];
3328
3329         u32 size;
3330         u_char pci_byte;
3331         u32 conf;
3332         int i, k;
3333
3334         if (test_bit(IDT77252_BIT_INIT, &card->flags)) {
3335                 printk("Error: SAR already initialized.\n");
3336                 return -1;
3337         }
3338
3339 /*****************************************************************/
3340 /*   P C I   C O N F I G U R A T I O N                           */
3341 /*****************************************************************/
3342
3343         /* Set PCI Retry-Timeout and TRDY timeout */
3344         IPRINTK("%s: Checking PCI retries.\n", card->name);
3345         if (pci_read_config_byte(pcidev, 0x40, &pci_byte) != 0) {
3346                 printk("%s: can't read PCI retry timeout.\n", card->name);
3347                 deinit_card(card);
3348                 return -1;
3349         }
3350         if (pci_byte != 0) {
3351                 IPRINTK("%s: PCI retry timeout: %d, set to 0.\n",
3352                         card->name, pci_byte);
3353                 if (pci_write_config_byte(pcidev, 0x40, 0) != 0) {
3354                         printk("%s: can't set PCI retry timeout.\n",
3355                                card->name);
3356                         deinit_card(card);
3357                         return -1;
3358                 }
3359         }
3360         IPRINTK("%s: Checking PCI TRDY.\n", card->name);
3361         if (pci_read_config_byte(pcidev, 0x41, &pci_byte) != 0) {
3362                 printk("%s: can't read PCI TRDY timeout.\n", card->name);
3363                 deinit_card(card);
3364                 return -1;
3365         }
3366         if (pci_byte != 0) {
3367                 IPRINTK("%s: PCI TRDY timeout: %d, set to 0.\n",
3368                         card->name, pci_byte);
3369                 if (pci_write_config_byte(pcidev, 0x41, 0) != 0) {
3370                         printk("%s: can't set PCI TRDY timeout.\n", card->name);
3371                         deinit_card(card);
3372                         return -1;
3373                 }
3374         }
3375         /* Reset Timer register */
3376         if (readl(SAR_REG_STAT) & SAR_STAT_TMROF) {
3377                 printk("%s: resetting timer overflow.\n", card->name);
3378                 writel(SAR_STAT_TMROF, SAR_REG_STAT);
3379         }
3380         IPRINTK("%s: Request IRQ ... ", card->name);
3381         if (request_irq(pcidev->irq, idt77252_interrupt, IRQF_DISABLED|IRQF_SHARED,
3382                         card->name, card) != 0) {
3383                 printk("%s: can't allocate IRQ.\n", card->name);
3384                 deinit_card(card);
3385                 return -1;
3386         }
3387         IPRINTK("got %d.\n", pcidev->irq);
3388
3389 /*****************************************************************/
3390 /*   C H E C K   A N D   I N I T   S R A M                       */
3391 /*****************************************************************/
3392
3393         IPRINTK("%s: Initializing SRAM\n", card->name);
3394
3395         /* preset size of connecton table, so that init_sram() knows about it */
3396         conf =  SAR_CFG_TX_FIFO_SIZE_9 |        /* Use maximum fifo size */
3397                 SAR_CFG_RXSTQ_SIZE_8k |         /* Receive Status Queue is 8k */
3398                 SAR_CFG_IDLE_CLP |              /* Set CLP on idle cells */
3399 #ifndef CONFIG_ATM_IDT77252_SEND_IDLE
3400                 SAR_CFG_NO_IDLE |               /* Do not send idle cells */
3401 #endif
3402                 0;
3403
3404         if (card->sramsize == (512 * 1024))
3405                 conf |= SAR_CFG_CNTBL_1k;
3406         else
3407                 conf |= SAR_CFG_CNTBL_512;
3408
3409         switch (vpibits) {
3410         case 0:
3411                 conf |= SAR_CFG_VPVCS_0;
3412                 break;
3413         default:
3414         case 1:
3415                 conf |= SAR_CFG_VPVCS_1;
3416                 break;
3417         case 2:
3418                 conf |= SAR_CFG_VPVCS_2;
3419                 break;
3420         case 8:
3421                 conf |= SAR_CFG_VPVCS_8;
3422                 break;
3423         }
3424
3425         writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG);
3426
3427         if (init_sram(card) < 0)
3428                 return -1;
3429
3430 /********************************************************************/
3431 /*  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 */
3432 /********************************************************************/
3433         /* Initialize TSQ */
3434         if (0 != init_tsq(card)) {
3435                 deinit_card(card);
3436                 return -1;
3437         }
3438         /* Initialize RSQ */
3439         if (0 != init_rsq(card)) {
3440                 deinit_card(card);
3441                 return -1;
3442         }
3443
3444         card->vpibits = vpibits;
3445         if (card->sramsize == (512 * 1024)) {
3446                 card->vcibits = 10 - card->vpibits;
3447         } else {
3448                 card->vcibits = 9 - card->vpibits;
3449         }
3450
3451         card->vcimask = 0;
3452         for (k = 0, i = 1; k < card->vcibits; k++) {
3453                 card->vcimask |= i;
3454                 i <<= 1;
3455         }
3456
3457         IPRINTK("%s: Setting VPI/VCI mask to zero.\n", card->name);
3458         writel(0, SAR_REG_VPM);
3459
3460         /* Little Endian Order   */
3461         writel(0, SAR_REG_GP);
3462
3463         /* Initialize RAW Cell Handle Register  */
3464         card->raw_cell_hnd = pci_alloc_consistent(card->pcidev, 2 * sizeof(u32),
3465                                                   &card->raw_cell_paddr);
3466         if (!card->raw_cell_hnd) {
3467                 printk("%s: memory allocation failure.\n", card->name);
3468                 deinit_card(card);
3469                 return -1;
3470         }
3471         memset(card->raw_cell_hnd, 0, 2 * sizeof(u32));
3472         writel(card->raw_cell_paddr, SAR_REG_RAWHND);
3473         IPRINTK("%s: raw cell handle is at 0x%p.\n", card->name,
3474                 card->raw_cell_hnd);
3475
3476         size = sizeof(struct vc_map *) * card->tct_size;
3477         IPRINTK("%s: allocate %d byte for VC map.\n", card->name, size);
3478         if (NULL == (card->vcs = vmalloc(size))) {
3479                 printk("%s: memory allocation failure.\n", card->name);
3480                 deinit_card(card);
3481                 return -1;
3482         }
3483         memset(card->vcs, 0, size);
3484
3485         size = sizeof(struct vc_map *) * card->scd_size;
3486         IPRINTK("%s: allocate %d byte for SCD to VC mapping.\n",
3487                 card->name, size);
3488         if (NULL == (card->scd2vc = vmalloc(size))) {
3489                 printk("%s: memory allocation failure.\n", card->name);
3490                 deinit_card(card);
3491                 return -1;
3492         }
3493         memset(card->scd2vc, 0, size);
3494
3495         size = sizeof(struct tst_info) * (card->tst_size - 2);
3496         IPRINTK("%s: allocate %d byte for TST to VC mapping.\n",
3497                 card->name, size);
3498         if (NULL == (card->soft_tst = vmalloc(size))) {
3499                 printk("%s: memory allocation failure.\n", card->name);
3500                 deinit_card(card);
3501                 return -1;
3502         }
3503         for (i = 0; i < card->tst_size - 2; i++) {
3504                 card->soft_tst[i].tste = TSTE_OPC_VAR;
3505                 card->soft_tst[i].vc = NULL;
3506         }
3507
3508         if (dev->phy == NULL) {
3509                 printk("%s: No LT device defined.\n", card->name);
3510                 deinit_card(card);
3511                 return -1;
3512         }
3513         if (dev->phy->ioctl == NULL) {
3514                 printk("%s: LT had no IOCTL funtion defined.\n", card->name);
3515                 deinit_card(card);
3516                 return -1;
3517         }
3518
3519 #ifdef  CONFIG_ATM_IDT77252_USE_SUNI
3520         /*
3521          * this is a jhs hack to get around special functionality in the
3522          * phy driver for the atecom hardware; the functionality doesn't
3523          * exist in the linux atm suni driver
3524          *
3525          * it isn't the right way to do things, but as the guy from NIST
3526          * said, talking about their measurement of the fine structure
3527          * constant, "it's good enough for government work."
3528          */
3529         linkrate = 149760000;
3530 #endif
3531
3532         card->link_pcr = (linkrate / 8 / 53);
3533         printk("%s: Linkrate on ATM line : %u bit/s, %u cell/s.\n",
3534                card->name, linkrate, card->link_pcr);
3535
3536 #ifdef CONFIG_ATM_IDT77252_SEND_IDLE
3537         card->utopia_pcr = card->link_pcr;
3538 #else
3539         card->utopia_pcr = (160000000 / 8 / 54);
3540 #endif
3541
3542         rsvdcr = 0;
3543         if (card->utopia_pcr > card->link_pcr)
3544                 rsvdcr = card->utopia_pcr - card->link_pcr;
3545
3546         tmpl = (unsigned long) rsvdcr * ((unsigned long) card->tst_size - 2);
3547         modl = tmpl % (unsigned long)card->utopia_pcr;
3548         tst_entries = (int) (tmpl / (unsigned long)card->utopia_pcr);
3549         if (modl)
3550                 tst_entries++;
3551         card->tst_free -= tst_entries;
3552         fill_tst(card, NULL, tst_entries, TSTE_OPC_NULL);
3553
3554 #ifdef HAVE_EEPROM
3555         idt77252_eeprom_init(card);
3556         printk("%s: EEPROM: %02x:", card->name,
3557                 idt77252_eeprom_read_status(card));
3558
3559         for (i = 0; i < 0x80; i++) {
3560                 printk(" %02x", 
3561                 idt77252_eeprom_read_byte(card, i)
3562                 );
3563         }
3564         printk("\n");
3565 #endif /* HAVE_EEPROM */
3566
3567         /*
3568          * XXX: <hack>
3569          */
3570         sprintf(tname, "eth%d", card->index);
3571         tmp = dev_get_by_name(tname);   /* jhs: was "tmp = dev_get(tname);" */
3572         if (tmp) {
3573                 memcpy(card->atmdev->esi, tmp->dev_addr, 6);
3574
3575                 printk("%s: ESI %02x:%02x:%02x:%02x:%02x:%02x\n",
3576                        card->name, card->atmdev->esi[0], card->atmdev->esi[1],
3577                        card->atmdev->esi[2], card->atmdev->esi[3],
3578                        card->atmdev->esi[4], card->atmdev->esi[5]);
3579         }
3580         /*
3581          * XXX: </hack>
3582          */
3583
3584         /* Set Maximum Deficit Count for now. */
3585         writel(0xffff, SAR_REG_MDFCT);
3586
3587         set_bit(IDT77252_BIT_INIT, &card->flags);
3588
3589         XPRINTK("%s: IDT77252 ABR SAR initialization complete.\n", card->name);
3590         return 0;
3591 }
3592
3593
3594 /*****************************************************************************/
3595 /*                                                                           */
3596 /* Probing of IDT77252 ABR SAR                                               */
3597 /*                                                                           */
3598 /*****************************************************************************/
3599
3600
3601 static int __devinit
3602 idt77252_preset(struct idt77252_dev *card)
3603 {
3604         u16 pci_command;
3605
3606 /*****************************************************************/
3607 /*   P C I   C O N F I G U R A T I O N                           */
3608 /*****************************************************************/
3609
3610         XPRINTK("%s: Enable PCI master and memory access for SAR.\n",
3611                 card->name);
3612         if (pci_read_config_word(card->pcidev, PCI_COMMAND, &pci_command)) {
3613                 printk("%s: can't read PCI_COMMAND.\n", card->name);
3614                 deinit_card(card);
3615                 return -1;
3616         }
3617         if (!(pci_command & PCI_COMMAND_IO)) {
3618                 printk("%s: PCI_COMMAND: %04x (???)\n",
3619                        card->name, pci_command);
3620                 deinit_card(card);
3621                 return (-1);
3622         }
3623         pci_command |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
3624         if (pci_write_config_word(card->pcidev, PCI_COMMAND, pci_command)) {
3625                 printk("%s: can't write PCI_COMMAND.\n", card->name);
3626                 deinit_card(card);
3627                 return -1;
3628         }
3629 /*****************************************************************/
3630 /*   G E N E R I C   R E S E T                                   */
3631 /*****************************************************************/
3632
3633         /* Software reset */
3634         writel(SAR_CFG_SWRST, SAR_REG_CFG);
3635         mdelay(1);
3636         writel(0, SAR_REG_CFG);
3637
3638         IPRINTK("%s: Software resetted.\n", card->name);
3639         return 0;
3640 }
3641
3642
3643 static unsigned long __devinit
3644 probe_sram(struct idt77252_dev *card)
3645 {
3646         u32 data, addr;
3647
3648         writel(0, SAR_REG_DR0);
3649         writel(SAR_CMD_WRITE_SRAM | (0 << 2), SAR_REG_CMD);
3650
3651         for (addr = 0x4000; addr < 0x80000; addr += 0x4000) {
3652                 writel(ATM_POISON, SAR_REG_DR0);
3653                 writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD);
3654
3655                 writel(SAR_CMD_READ_SRAM | (0 << 2), SAR_REG_CMD);
3656                 data = readl(SAR_REG_DR0);
3657
3658                 if (data != 0)
3659                         break;
3660         }
3661
3662         return addr * sizeof(u32);
3663 }
3664
3665 static int __devinit
3666 idt77252_init_one(struct pci_dev *pcidev, const struct pci_device_id *id)
3667 {
3668         static struct idt77252_dev **last = &idt77252_chain;
3669         static int index = 0;
3670
3671         unsigned long membase, srambase;
3672         struct idt77252_dev *card;
3673         struct atm_dev *dev;
3674         ushort revision = 0;
3675         int i, err;
3676
3677
3678         if ((err = pci_enable_device(pcidev))) {
3679                 printk("idt77252: can't enable PCI device at %s\n", pci_name(pcidev));
3680                 return err;
3681         }
3682
3683         if (pci_read_config_word(pcidev, PCI_REVISION_ID, &revision)) {
3684                 printk("idt77252-%d: can't read PCI_REVISION_ID\n", index);
3685                 err = -ENODEV;
3686                 goto err_out_disable_pdev;
3687         }
3688
3689         card = kzalloc(sizeof(struct idt77252_dev), GFP_KERNEL);
3690         if (!card) {
3691                 printk("idt77252-%d: can't allocate private data\n", index);
3692                 err = -ENOMEM;
3693                 goto err_out_disable_pdev;
3694         }
3695         card->revision = revision;
3696         card->index = index;
3697         card->pcidev = pcidev;
3698         sprintf(card->name, "idt77252-%d", card->index);
3699
3700         INIT_WORK(&card->tqueue, idt77252_softint, (void *)card);
3701
3702         membase = pci_resource_start(pcidev, 1);
3703         srambase = pci_resource_start(pcidev, 2);
3704
3705         init_MUTEX(&card->mutex);
3706         spin_lock_init(&card->cmd_lock);
3707         spin_lock_init(&card->tst_lock);
3708
3709         init_timer(&card->tst_timer);
3710         card->tst_timer.data = (unsigned long)card;
3711         card->tst_timer.function = tst_timer;
3712
3713         /* Do the I/O remapping... */
3714         card->membase = ioremap(membase, 1024);
3715         if (!card->membase) {
3716                 printk("%s: can't ioremap() membase\n", card->name);
3717                 err = -EIO;
3718                 goto err_out_free_card;
3719         }
3720
3721         if (idt77252_preset(card)) {
3722                 printk("%s: preset failed\n", card->name);
3723                 err = -EIO;
3724                 goto err_out_iounmap;
3725         }
3726
3727         dev = atm_dev_register("idt77252", &idt77252_ops, -1, NULL);
3728         if (!dev) {
3729                 printk("%s: can't register atm device\n", card->name);
3730                 err = -EIO;
3731                 goto err_out_iounmap;
3732         }
3733         dev->dev_data = card;
3734         card->atmdev = dev;
3735
3736 #ifdef  CONFIG_ATM_IDT77252_USE_SUNI
3737         suni_init(dev);
3738         if (!dev->phy) {
3739                 printk("%s: can't init SUNI\n", card->name);
3740                 err = -EIO;
3741                 goto err_out_deinit_card;
3742         }
3743 #endif  /* CONFIG_ATM_IDT77252_USE_SUNI */
3744
3745         card->sramsize = probe_sram(card);
3746
3747         for (i = 0; i < 4; i++) {
3748                 card->fbq[i] = ioremap(srambase | 0x200000 | (i << 18), 4);
3749                 if (!card->fbq[i]) {
3750                         printk("%s: can't ioremap() FBQ%d\n", card->name, i);
3751                         err = -EIO;
3752                         goto err_out_deinit_card;
3753                 }
3754         }
3755
3756         printk("%s: ABR SAR (Rev %c): MEM %08lx SRAM %08lx [%u KB]\n",
3757                card->name, ((revision > 1) && (revision < 25)) ?
3758                'A' + revision - 1 : '?', membase, srambase,
3759                card->sramsize / 1024);
3760
3761         if (init_card(dev)) {
3762                 printk("%s: init_card failed\n", card->name);
3763                 err = -EIO;
3764                 goto err_out_deinit_card;
3765         }
3766
3767         dev->ci_range.vpi_bits = card->vpibits;
3768         dev->ci_range.vci_bits = card->vcibits;
3769         dev->link_rate = card->link_pcr;
3770
3771         if (dev->phy->start)
3772                 dev->phy->start(dev);
3773
3774         if (idt77252_dev_open(card)) {
3775                 printk("%s: dev_open failed\n", card->name);
3776                 err = -EIO;
3777                 goto err_out_stop;
3778         }
3779
3780         *last = card;
3781         last = &card->next;
3782         index++;
3783
3784         return 0;
3785
3786 err_out_stop:
3787         if (dev->phy->stop)
3788                 dev->phy->stop(dev);
3789
3790 err_out_deinit_card:
3791         deinit_card(card);
3792
3793 err_out_iounmap:
3794         iounmap(card->membase);
3795
3796 err_out_free_card:
3797         kfree(card);
3798
3799 err_out_disable_pdev:
3800         pci_disable_device(pcidev);
3801         return err;
3802 }
3803
3804 static struct pci_device_id idt77252_pci_tbl[] =
3805 {
3806         { PCI_VENDOR_ID_IDT, PCI_DEVICE_ID_IDT_IDT77252,
3807           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
3808         { 0, }
3809 };
3810
3811 MODULE_DEVICE_TABLE(pci, idt77252_pci_tbl);
3812
3813 static struct pci_driver idt77252_driver = {
3814         .name           = "idt77252",
3815         .id_table       = idt77252_pci_tbl,
3816         .probe          = idt77252_init_one,
3817 };
3818
3819 static int __init idt77252_init(void)
3820 {
3821         struct sk_buff *skb;
3822
3823         printk("%s: at %p\n", __FUNCTION__, idt77252_init);
3824
3825         if (sizeof(skb->cb) < sizeof(struct atm_skb_data) +
3826                               sizeof(struct idt77252_skb_prv)) {
3827                 printk(KERN_ERR "%s: skb->cb is too small (%lu < %lu)\n",
3828                        __FUNCTION__, (unsigned long) sizeof(skb->cb),
3829                        (unsigned long) sizeof(struct atm_skb_data) +
3830                                        sizeof(struct idt77252_skb_prv));
3831                 return -EIO;
3832         }
3833
3834         return pci_register_driver(&idt77252_driver);
3835 }
3836
3837 static void __exit idt77252_exit(void)
3838 {
3839         struct idt77252_dev *card;
3840         struct atm_dev *dev;
3841
3842         pci_unregister_driver(&idt77252_driver);
3843
3844         while (idt77252_chain) {
3845                 card = idt77252_chain;
3846                 dev = card->atmdev;
3847                 idt77252_chain = card->next;
3848
3849                 if (dev->phy->stop)
3850                         dev->phy->stop(dev);
3851                 deinit_card(card);
3852                 pci_disable_device(card->pcidev);
3853                 kfree(card);
3854         }
3855
3856         DIPRINTK("idt77252: finished cleanup-module().\n");
3857 }
3858
3859 module_init(idt77252_init);
3860 module_exit(idt77252_exit);
3861
3862 MODULE_LICENSE("GPL");
3863
3864 module_param(vpibits, uint, 0);
3865 MODULE_PARM_DESC(vpibits, "number of VPI bits supported (0, 1, or 2)");
3866 #ifdef CONFIG_ATM_IDT77252_DEBUG
3867 module_param(debug, ulong, 0644);
3868 MODULE_PARM_DESC(debug,   "debug bitmap, see drivers/atm/idt77252.h");
3869 #endif
3870
3871 MODULE_AUTHOR("Eddie C. Dost <ecd@atecom.com>");
3872 MODULE_DESCRIPTION("IDT77252 ABR SAR Driver");