WorkStruct: make allyesconfig
[linux-2.6.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(struct work_struct *work);
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(struct work_struct *work)
2870 {
2871         struct idt77252_dev *card =
2872                 container_of(work, struct idt77252_dev, tqueue);
2873         u32 stat;
2874         int done;
2875
2876         for (done = 1; ; done = 1) {
2877                 stat = readl(SAR_REG_STAT) >> 16;
2878
2879                 if ((stat & 0x0f) < SAR_FBQ0_HIGH) {
2880                         add_rx_skb(card, 0, SAR_FB_SIZE_0, 32);
2881                         done = 0;
2882                 }
2883
2884                 stat >>= 4;
2885                 if ((stat & 0x0f) < SAR_FBQ1_HIGH) {
2886                         add_rx_skb(card, 1, SAR_FB_SIZE_1, 32);
2887                         done = 0;
2888                 }
2889
2890                 stat >>= 4;
2891                 if ((stat & 0x0f) < SAR_FBQ2_HIGH) {
2892                         add_rx_skb(card, 2, SAR_FB_SIZE_2, 32);
2893                         done = 0;
2894                 }
2895
2896                 stat >>= 4;
2897                 if ((stat & 0x0f) < SAR_FBQ3_HIGH) {
2898                         add_rx_skb(card, 3, SAR_FB_SIZE_3, 32);
2899                         done = 0;
2900                 }
2901
2902                 if (done)
2903                         break;
2904         }
2905
2906         writel(readl(SAR_REG_CFG) | SAR_CFG_FBIE, SAR_REG_CFG);
2907 }
2908
2909
2910 static int
2911 open_card_oam(struct idt77252_dev *card)
2912 {
2913         unsigned long flags;
2914         unsigned long addr;
2915         struct vc_map *vc;
2916         int vpi, vci;
2917         int index;
2918         u32 rcte;
2919
2920         for (vpi = 0; vpi < (1 << card->vpibits); vpi++) {
2921                 for (vci = 3; vci < 5; vci++) {
2922                         index = VPCI2VC(card, vpi, vci);
2923
2924                         vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2925                         if (!vc) {
2926                                 printk("%s: can't alloc vc\n", card->name);
2927                                 return -ENOMEM;
2928                         }
2929                         vc->index = index;
2930                         card->vcs[index] = vc;
2931
2932                         flush_rx_pool(card, &vc->rcv.rx_pool);
2933
2934                         rcte = SAR_RCTE_CONNECTOPEN |
2935                                SAR_RCTE_RAWCELLINTEN |
2936                                SAR_RCTE_RCQ |
2937                                SAR_RCTE_FBP_1;
2938
2939                         addr = card->rct_base + (vc->index << 2);
2940                         write_sram(card, addr, rcte);
2941
2942                         spin_lock_irqsave(&card->cmd_lock, flags);
2943                         writel(SAR_CMD_OPEN_CONNECTION | (addr << 2),
2944                                SAR_REG_CMD);
2945                         waitfor_idle(card);
2946                         spin_unlock_irqrestore(&card->cmd_lock, flags);
2947                 }
2948         }
2949
2950         return 0;
2951 }
2952
2953 static void
2954 close_card_oam(struct idt77252_dev *card)
2955 {
2956         unsigned long flags;
2957         unsigned long addr;
2958         struct vc_map *vc;
2959         int vpi, vci;
2960         int index;
2961
2962         for (vpi = 0; vpi < (1 << card->vpibits); vpi++) {
2963                 for (vci = 3; vci < 5; vci++) {
2964                         index = VPCI2VC(card, vpi, vci);
2965                         vc = card->vcs[index];
2966
2967                         addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE;
2968
2969                         spin_lock_irqsave(&card->cmd_lock, flags);
2970                         writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2),
2971                                SAR_REG_CMD);
2972                         waitfor_idle(card);
2973                         spin_unlock_irqrestore(&card->cmd_lock, flags);
2974
2975                         if (vc->rcv.rx_pool.count) {
2976                                 DPRINTK("%s: closing a VC "
2977                                         "with pending rx buffers.\n",
2978                                         card->name);
2979
2980                                 recycle_rx_pool_skb(card, &vc->rcv.rx_pool);
2981                         }
2982                 }
2983         }
2984 }
2985
2986 static int
2987 open_card_ubr0(struct idt77252_dev *card)
2988 {
2989         struct vc_map *vc;
2990
2991         vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2992         if (!vc) {
2993                 printk("%s: can't alloc vc\n", card->name);
2994                 return -ENOMEM;
2995         }
2996         card->vcs[0] = vc;
2997         vc->class = SCHED_UBR0;
2998
2999         vc->scq = alloc_scq(card, vc->class);
3000         if (!vc->scq) {
3001                 printk("%s: can't get SCQ.\n", card->name);
3002                 return -ENOMEM;
3003         }
3004
3005         card->scd2vc[0] = vc;
3006         vc->scd_index = 0;
3007         vc->scq->scd = card->scd_base;
3008
3009         fill_scd(card, vc->scq, vc->class);
3010
3011         write_sram(card, card->tct_base + 0, TCT_UBR | card->scd_base);
3012         write_sram(card, card->tct_base + 1, 0);
3013         write_sram(card, card->tct_base + 2, 0);
3014         write_sram(card, card->tct_base + 3, 0);
3015         write_sram(card, card->tct_base + 4, 0);
3016         write_sram(card, card->tct_base + 5, 0);
3017         write_sram(card, card->tct_base + 6, 0);
3018         write_sram(card, card->tct_base + 7, TCT_FLAG_UBR);
3019
3020         clear_bit(VCF_IDLE, &vc->flags);
3021         writel(TCMDQ_START | 0, SAR_REG_TCMDQ);
3022         return 0;
3023 }
3024
3025 static int
3026 idt77252_dev_open(struct idt77252_dev *card)
3027 {
3028         u32 conf;
3029
3030         if (!test_bit(IDT77252_BIT_INIT, &card->flags)) {
3031                 printk("%s: SAR not yet initialized.\n", card->name);
3032                 return -1;
3033         }
3034
3035         conf = SAR_CFG_RXPTH|   /* enable receive path                  */
3036             SAR_RX_DELAY |      /* interrupt on complete PDU            */
3037             SAR_CFG_RAWIE |     /* interrupt enable on raw cells        */
3038             SAR_CFG_RQFIE |     /* interrupt on RSQ almost full         */
3039             SAR_CFG_TMOIE |     /* interrupt on timer overflow          */
3040             SAR_CFG_FBIE |      /* interrupt on low free buffers        */
3041             SAR_CFG_TXEN |      /* transmit operation enable            */
3042             SAR_CFG_TXINT |     /* interrupt on transmit status         */
3043             SAR_CFG_TXUIE |     /* interrupt on transmit underrun       */
3044             SAR_CFG_TXSFI |     /* interrupt on TSQ almost full         */
3045             SAR_CFG_PHYIE       /* enable PHY interrupts                */
3046             ;
3047
3048 #ifdef CONFIG_ATM_IDT77252_RCV_ALL
3049         /* Test RAW cell receive. */
3050         conf |= SAR_CFG_VPECA;
3051 #endif
3052
3053         writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG);
3054
3055         if (open_card_oam(card)) {
3056                 printk("%s: Error initializing OAM.\n", card->name);
3057                 return -1;
3058         }
3059
3060         if (open_card_ubr0(card)) {
3061                 printk("%s: Error initializing UBR0.\n", card->name);
3062                 return -1;
3063         }
3064
3065         IPRINTK("%s: opened IDT77252 ABR SAR.\n", card->name);
3066         return 0;
3067 }
3068
3069 void
3070 idt77252_dev_close(struct atm_dev *dev)
3071 {
3072         struct idt77252_dev *card = dev->dev_data;
3073         u32 conf;
3074
3075         close_card_oam(card);
3076
3077         conf = SAR_CFG_RXPTH |  /* enable receive path           */
3078             SAR_RX_DELAY |      /* interrupt on complete PDU     */
3079             SAR_CFG_RAWIE |     /* interrupt enable on raw cells */
3080             SAR_CFG_RQFIE |     /* interrupt on RSQ almost full  */
3081             SAR_CFG_TMOIE |     /* interrupt on timer overflow   */
3082             SAR_CFG_FBIE |      /* interrupt on low free buffers */
3083             SAR_CFG_TXEN |      /* transmit operation enable     */
3084             SAR_CFG_TXINT |     /* interrupt on transmit status  */
3085             SAR_CFG_TXUIE |     /* interrupt on xmit underrun    */
3086             SAR_CFG_TXSFI       /* interrupt on TSQ almost full  */
3087             ;
3088
3089         writel(readl(SAR_REG_CFG) & ~(conf), SAR_REG_CFG);
3090
3091         DIPRINTK("%s: closed IDT77252 ABR SAR.\n", card->name);
3092 }
3093
3094
3095 /*****************************************************************************/
3096 /*                                                                           */
3097 /* Initialisation and Deinitialization of IDT77252                           */
3098 /*                                                                           */
3099 /*****************************************************************************/
3100
3101
3102 static void
3103 deinit_card(struct idt77252_dev *card)
3104 {
3105         struct sk_buff *skb;
3106         int i, j;
3107
3108         if (!test_bit(IDT77252_BIT_INIT, &card->flags)) {
3109                 printk("%s: SAR not yet initialized.\n", card->name);
3110                 return;
3111         }
3112         DIPRINTK("idt77252: deinitialize card %u\n", card->index);
3113
3114         writel(0, SAR_REG_CFG);
3115
3116         if (card->atmdev)
3117                 atm_dev_deregister(card->atmdev);
3118
3119         for (i = 0; i < 4; i++) {
3120                 for (j = 0; j < FBQ_SIZE; j++) {
3121                         skb = card->sbpool[i].skb[j];
3122                         if (skb) {
3123                                 pci_unmap_single(card->pcidev,
3124                                                  IDT77252_PRV_PADDR(skb),
3125                                                  skb->end - skb->data,
3126                                                  PCI_DMA_FROMDEVICE);
3127                                 card->sbpool[i].skb[j] = NULL;
3128                                 dev_kfree_skb(skb);
3129                         }
3130                 }
3131         }
3132
3133         vfree(card->soft_tst);
3134
3135         vfree(card->scd2vc);
3136
3137         vfree(card->vcs);
3138
3139         if (card->raw_cell_hnd) {
3140                 pci_free_consistent(card->pcidev, 2 * sizeof(u32),
3141                                     card->raw_cell_hnd, card->raw_cell_paddr);
3142         }
3143
3144         if (card->rsq.base) {
3145                 DIPRINTK("%s: Release RSQ ...\n", card->name);
3146                 deinit_rsq(card);
3147         }
3148
3149         if (card->tsq.base) {
3150                 DIPRINTK("%s: Release TSQ ...\n", card->name);
3151                 deinit_tsq(card);
3152         }
3153
3154         DIPRINTK("idt77252: Release IRQ.\n");
3155         free_irq(card->pcidev->irq, card);
3156
3157         for (i = 0; i < 4; i++) {
3158                 if (card->fbq[i])
3159                         iounmap(card->fbq[i]);
3160         }
3161
3162         if (card->membase)
3163                 iounmap(card->membase);
3164
3165         clear_bit(IDT77252_BIT_INIT, &card->flags);
3166         DIPRINTK("%s: Card deinitialized.\n", card->name);
3167 }
3168
3169
3170 static int __devinit
3171 init_sram(struct idt77252_dev *card)
3172 {
3173         int i;
3174
3175         for (i = 0; i < card->sramsize; i += 4)
3176                 write_sram(card, (i >> 2), 0);
3177
3178         /* set SRAM layout for THIS card */
3179         if (card->sramsize == (512 * 1024)) {
3180                 card->tct_base = SAR_SRAM_TCT_128_BASE;
3181                 card->tct_size = (SAR_SRAM_TCT_128_TOP - card->tct_base + 1)
3182                     / SAR_SRAM_TCT_SIZE;
3183                 card->rct_base = SAR_SRAM_RCT_128_BASE;
3184                 card->rct_size = (SAR_SRAM_RCT_128_TOP - card->rct_base + 1)
3185                     / SAR_SRAM_RCT_SIZE;
3186                 card->rt_base = SAR_SRAM_RT_128_BASE;
3187                 card->scd_base = SAR_SRAM_SCD_128_BASE;
3188                 card->scd_size = (SAR_SRAM_SCD_128_TOP - card->scd_base + 1)
3189                     / SAR_SRAM_SCD_SIZE;
3190                 card->tst[0] = SAR_SRAM_TST1_128_BASE;
3191                 card->tst[1] = SAR_SRAM_TST2_128_BASE;
3192                 card->tst_size = SAR_SRAM_TST1_128_TOP - card->tst[0] + 1;
3193                 card->abrst_base = SAR_SRAM_ABRSTD_128_BASE;
3194                 card->abrst_size = SAR_ABRSTD_SIZE_8K;
3195                 card->fifo_base = SAR_SRAM_FIFO_128_BASE;
3196                 card->fifo_size = SAR_RXFD_SIZE_32K;
3197         } else {
3198                 card->tct_base = SAR_SRAM_TCT_32_BASE;
3199                 card->tct_size = (SAR_SRAM_TCT_32_TOP - card->tct_base + 1)
3200                     / SAR_SRAM_TCT_SIZE;
3201                 card->rct_base = SAR_SRAM_RCT_32_BASE;
3202                 card->rct_size = (SAR_SRAM_RCT_32_TOP - card->rct_base + 1)
3203                     / SAR_SRAM_RCT_SIZE;
3204                 card->rt_base = SAR_SRAM_RT_32_BASE;
3205                 card->scd_base = SAR_SRAM_SCD_32_BASE;
3206                 card->scd_size = (SAR_SRAM_SCD_32_TOP - card->scd_base + 1)
3207                     / SAR_SRAM_SCD_SIZE;
3208                 card->tst[0] = SAR_SRAM_TST1_32_BASE;
3209                 card->tst[1] = SAR_SRAM_TST2_32_BASE;
3210                 card->tst_size = (SAR_SRAM_TST1_32_TOP - card->tst[0] + 1);
3211                 card->abrst_base = SAR_SRAM_ABRSTD_32_BASE;
3212                 card->abrst_size = SAR_ABRSTD_SIZE_1K;
3213                 card->fifo_base = SAR_SRAM_FIFO_32_BASE;
3214                 card->fifo_size = SAR_RXFD_SIZE_4K;
3215         }
3216
3217         /* Initialize TCT */
3218         for (i = 0; i < card->tct_size; i++) {
3219                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 0, 0);
3220                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 1, 0);
3221                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 2, 0);
3222                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 3, 0);
3223                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 4, 0);
3224                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 5, 0);
3225                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 6, 0);
3226                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 7, 0);
3227         }
3228
3229         /* Initialize RCT */
3230         for (i = 0; i < card->rct_size; i++) {
3231                 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE,
3232                                     (u32) SAR_RCTE_RAWCELLINTEN);
3233                 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 1,
3234                                     (u32) 0);
3235                 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 2,
3236                                     (u32) 0);
3237                 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 3,
3238                                     (u32) 0xffffffff);
3239         }
3240
3241         writel((SAR_FBQ0_LOW << 28) | 0x00000000 | 0x00000000 |
3242                (SAR_FB_SIZE_0 / 48), SAR_REG_FBQS0);
3243         writel((SAR_FBQ1_LOW << 28) | 0x00000000 | 0x00000000 |
3244                (SAR_FB_SIZE_1 / 48), SAR_REG_FBQS1);
3245         writel((SAR_FBQ2_LOW << 28) | 0x00000000 | 0x00000000 |
3246                (SAR_FB_SIZE_2 / 48), SAR_REG_FBQS2);
3247         writel((SAR_FBQ3_LOW << 28) | 0x00000000 | 0x00000000 |
3248                (SAR_FB_SIZE_3 / 48), SAR_REG_FBQS3);
3249
3250         /* Initialize rate table  */
3251         for (i = 0; i < 256; i++) {
3252                 write_sram(card, card->rt_base + i, log_to_rate[i]);
3253         }
3254
3255         for (i = 0; i < 128; i++) {
3256                 unsigned int tmp;
3257
3258                 tmp  = rate_to_log[(i << 2) + 0] << 0;
3259                 tmp |= rate_to_log[(i << 2) + 1] << 8;
3260                 tmp |= rate_to_log[(i << 2) + 2] << 16;
3261                 tmp |= rate_to_log[(i << 2) + 3] << 24;
3262                 write_sram(card, card->rt_base + 256 + i, tmp);
3263         }
3264
3265 #if 0 /* Fill RDF and AIR tables. */
3266         for (i = 0; i < 128; i++) {
3267                 unsigned int tmp;
3268
3269                 tmp = RDF[0][(i << 1) + 0] << 16;
3270                 tmp |= RDF[0][(i << 1) + 1] << 0;
3271                 write_sram(card, card->rt_base + 512 + i, tmp);
3272         }
3273
3274         for (i = 0; i < 128; i++) {
3275                 unsigned int tmp;
3276
3277                 tmp = AIR[0][(i << 1) + 0] << 16;
3278                 tmp |= AIR[0][(i << 1) + 1] << 0;
3279                 write_sram(card, card->rt_base + 640 + i, tmp);
3280         }
3281 #endif
3282
3283         IPRINTK("%s: initialize rate table ...\n", card->name);
3284         writel(card->rt_base << 2, SAR_REG_RTBL);
3285
3286         /* Initialize TSTs */
3287         IPRINTK("%s: initialize TST ...\n", card->name);
3288         card->tst_free = card->tst_size - 2;    /* last two are jumps */
3289
3290         for (i = card->tst[0]; i < card->tst[0] + card->tst_size - 2; i++)
3291                 write_sram(card, i, TSTE_OPC_VAR);
3292         write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2));
3293         idt77252_sram_write_errors = 1;
3294         write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2));
3295         idt77252_sram_write_errors = 0;
3296         for (i = card->tst[1]; i < card->tst[1] + card->tst_size - 2; i++)
3297                 write_sram(card, i, TSTE_OPC_VAR);
3298         write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2));
3299         idt77252_sram_write_errors = 1;
3300         write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2));
3301         idt77252_sram_write_errors = 0;
3302
3303         card->tst_index = 0;
3304         writel(card->tst[0] << 2, SAR_REG_TSTB);
3305
3306         /* Initialize ABRSTD and Receive FIFO */
3307         IPRINTK("%s: initialize ABRSTD ...\n", card->name);
3308         writel(card->abrst_size | (card->abrst_base << 2),
3309                SAR_REG_ABRSTD);
3310
3311         IPRINTK("%s: initialize receive fifo ...\n", card->name);
3312         writel(card->fifo_size | (card->fifo_base << 2),
3313                SAR_REG_RXFD);
3314
3315         IPRINTK("%s: SRAM initialization complete.\n", card->name);
3316         return 0;
3317 }
3318
3319 static int __devinit
3320 init_card(struct atm_dev *dev)
3321 {
3322         struct idt77252_dev *card = dev->dev_data;
3323         struct pci_dev *pcidev = card->pcidev;
3324         unsigned long tmpl, modl;
3325         unsigned int linkrate, rsvdcr;
3326         unsigned int tst_entries;
3327         struct net_device *tmp;
3328         char tname[10];
3329
3330         u32 size;
3331         u_char pci_byte;
3332         u32 conf;
3333         int i, k;
3334
3335         if (test_bit(IDT77252_BIT_INIT, &card->flags)) {
3336                 printk("Error: SAR already initialized.\n");
3337                 return -1;
3338         }
3339
3340 /*****************************************************************/
3341 /*   P C I   C O N F I G U R A T I O N                           */
3342 /*****************************************************************/
3343
3344         /* Set PCI Retry-Timeout and TRDY timeout */
3345         IPRINTK("%s: Checking PCI retries.\n", card->name);
3346         if (pci_read_config_byte(pcidev, 0x40, &pci_byte) != 0) {
3347                 printk("%s: can't read PCI retry timeout.\n", card->name);
3348                 deinit_card(card);
3349                 return -1;
3350         }
3351         if (pci_byte != 0) {
3352                 IPRINTK("%s: PCI retry timeout: %d, set to 0.\n",
3353                         card->name, pci_byte);
3354                 if (pci_write_config_byte(pcidev, 0x40, 0) != 0) {
3355                         printk("%s: can't set PCI retry timeout.\n",
3356                                card->name);
3357                         deinit_card(card);
3358                         return -1;
3359                 }
3360         }
3361         IPRINTK("%s: Checking PCI TRDY.\n", card->name);
3362         if (pci_read_config_byte(pcidev, 0x41, &pci_byte) != 0) {
3363                 printk("%s: can't read PCI TRDY timeout.\n", card->name);
3364                 deinit_card(card);
3365                 return -1;
3366         }
3367         if (pci_byte != 0) {
3368                 IPRINTK("%s: PCI TRDY timeout: %d, set to 0.\n",
3369                         card->name, pci_byte);
3370                 if (pci_write_config_byte(pcidev, 0x41, 0) != 0) {
3371                         printk("%s: can't set PCI TRDY timeout.\n", card->name);
3372                         deinit_card(card);
3373                         return -1;
3374                 }
3375         }
3376         /* Reset Timer register */
3377         if (readl(SAR_REG_STAT) & SAR_STAT_TMROF) {
3378                 printk("%s: resetting timer overflow.\n", card->name);
3379                 writel(SAR_STAT_TMROF, SAR_REG_STAT);
3380         }
3381         IPRINTK("%s: Request IRQ ... ", card->name);
3382         if (request_irq(pcidev->irq, idt77252_interrupt, IRQF_DISABLED|IRQF_SHARED,
3383                         card->name, card) != 0) {
3384                 printk("%s: can't allocate IRQ.\n", card->name);
3385                 deinit_card(card);
3386                 return -1;
3387         }
3388         IPRINTK("got %d.\n", pcidev->irq);
3389
3390 /*****************************************************************/
3391 /*   C H E C K   A N D   I N I T   S R A M                       */
3392 /*****************************************************************/
3393
3394         IPRINTK("%s: Initializing SRAM\n", card->name);
3395
3396         /* preset size of connecton table, so that init_sram() knows about it */
3397         conf =  SAR_CFG_TX_FIFO_SIZE_9 |        /* Use maximum fifo size */
3398                 SAR_CFG_RXSTQ_SIZE_8k |         /* Receive Status Queue is 8k */
3399                 SAR_CFG_IDLE_CLP |              /* Set CLP on idle cells */
3400 #ifndef CONFIG_ATM_IDT77252_SEND_IDLE
3401                 SAR_CFG_NO_IDLE |               /* Do not send idle cells */
3402 #endif
3403                 0;
3404
3405         if (card->sramsize == (512 * 1024))
3406                 conf |= SAR_CFG_CNTBL_1k;
3407         else
3408                 conf |= SAR_CFG_CNTBL_512;
3409
3410         switch (vpibits) {
3411         case 0:
3412                 conf |= SAR_CFG_VPVCS_0;
3413                 break;
3414         default:
3415         case 1:
3416                 conf |= SAR_CFG_VPVCS_1;
3417                 break;
3418         case 2:
3419                 conf |= SAR_CFG_VPVCS_2;
3420                 break;
3421         case 8:
3422                 conf |= SAR_CFG_VPVCS_8;
3423                 break;
3424         }
3425
3426         writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG);
3427
3428         if (init_sram(card) < 0)
3429                 return -1;
3430
3431 /********************************************************************/
3432 /*  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 */
3433 /********************************************************************/
3434         /* Initialize TSQ */
3435         if (0 != init_tsq(card)) {
3436                 deinit_card(card);
3437                 return -1;
3438         }
3439         /* Initialize RSQ */
3440         if (0 != init_rsq(card)) {
3441                 deinit_card(card);
3442                 return -1;
3443         }
3444
3445         card->vpibits = vpibits;
3446         if (card->sramsize == (512 * 1024)) {
3447                 card->vcibits = 10 - card->vpibits;
3448         } else {
3449                 card->vcibits = 9 - card->vpibits;
3450         }
3451
3452         card->vcimask = 0;
3453         for (k = 0, i = 1; k < card->vcibits; k++) {
3454                 card->vcimask |= i;
3455                 i <<= 1;
3456         }
3457
3458         IPRINTK("%s: Setting VPI/VCI mask to zero.\n", card->name);
3459         writel(0, SAR_REG_VPM);
3460
3461         /* Little Endian Order   */
3462         writel(0, SAR_REG_GP);
3463
3464         /* Initialize RAW Cell Handle Register  */
3465         card->raw_cell_hnd = pci_alloc_consistent(card->pcidev, 2 * sizeof(u32),
3466                                                   &card->raw_cell_paddr);
3467         if (!card->raw_cell_hnd) {
3468                 printk("%s: memory allocation failure.\n", card->name);
3469                 deinit_card(card);
3470                 return -1;
3471         }
3472         memset(card->raw_cell_hnd, 0, 2 * sizeof(u32));
3473         writel(card->raw_cell_paddr, SAR_REG_RAWHND);
3474         IPRINTK("%s: raw cell handle is at 0x%p.\n", card->name,
3475                 card->raw_cell_hnd);
3476
3477         size = sizeof(struct vc_map *) * card->tct_size;
3478         IPRINTK("%s: allocate %d byte for VC map.\n", card->name, size);
3479         if (NULL == (card->vcs = vmalloc(size))) {
3480                 printk("%s: memory allocation failure.\n", card->name);
3481                 deinit_card(card);
3482                 return -1;
3483         }
3484         memset(card->vcs, 0, size);
3485
3486         size = sizeof(struct vc_map *) * card->scd_size;
3487         IPRINTK("%s: allocate %d byte for SCD to VC mapping.\n",
3488                 card->name, size);
3489         if (NULL == (card->scd2vc = vmalloc(size))) {
3490                 printk("%s: memory allocation failure.\n", card->name);
3491                 deinit_card(card);
3492                 return -1;
3493         }
3494         memset(card->scd2vc, 0, size);
3495
3496         size = sizeof(struct tst_info) * (card->tst_size - 2);
3497         IPRINTK("%s: allocate %d byte for TST to VC mapping.\n",
3498                 card->name, size);
3499         if (NULL == (card->soft_tst = vmalloc(size))) {
3500                 printk("%s: memory allocation failure.\n", card->name);
3501                 deinit_card(card);
3502                 return -1;
3503         }
3504         for (i = 0; i < card->tst_size - 2; i++) {
3505                 card->soft_tst[i].tste = TSTE_OPC_VAR;
3506                 card->soft_tst[i].vc = NULL;
3507         }
3508
3509         if (dev->phy == NULL) {
3510                 printk("%s: No LT device defined.\n", card->name);
3511                 deinit_card(card);
3512                 return -1;
3513         }
3514         if (dev->phy->ioctl == NULL) {
3515                 printk("%s: LT had no IOCTL funtion defined.\n", card->name);
3516                 deinit_card(card);
3517                 return -1;
3518         }
3519
3520 #ifdef  CONFIG_ATM_IDT77252_USE_SUNI
3521         /*
3522          * this is a jhs hack to get around special functionality in the
3523          * phy driver for the atecom hardware; the functionality doesn't
3524          * exist in the linux atm suni driver
3525          *
3526          * it isn't the right way to do things, but as the guy from NIST
3527          * said, talking about their measurement of the fine structure
3528          * constant, "it's good enough for government work."
3529          */
3530         linkrate = 149760000;
3531 #endif
3532
3533         card->link_pcr = (linkrate / 8 / 53);
3534         printk("%s: Linkrate on ATM line : %u bit/s, %u cell/s.\n",
3535                card->name, linkrate, card->link_pcr);
3536
3537 #ifdef CONFIG_ATM_IDT77252_SEND_IDLE
3538         card->utopia_pcr = card->link_pcr;
3539 #else
3540         card->utopia_pcr = (160000000 / 8 / 54);
3541 #endif
3542
3543         rsvdcr = 0;
3544         if (card->utopia_pcr > card->link_pcr)
3545                 rsvdcr = card->utopia_pcr - card->link_pcr;
3546
3547         tmpl = (unsigned long) rsvdcr * ((unsigned long) card->tst_size - 2);
3548         modl = tmpl % (unsigned long)card->utopia_pcr;
3549         tst_entries = (int) (tmpl / (unsigned long)card->utopia_pcr);
3550         if (modl)
3551                 tst_entries++;
3552         card->tst_free -= tst_entries;
3553         fill_tst(card, NULL, tst_entries, TSTE_OPC_NULL);
3554
3555 #ifdef HAVE_EEPROM
3556         idt77252_eeprom_init(card);
3557         printk("%s: EEPROM: %02x:", card->name,
3558                 idt77252_eeprom_read_status(card));
3559
3560         for (i = 0; i < 0x80; i++) {
3561                 printk(" %02x", 
3562                 idt77252_eeprom_read_byte(card, i)
3563                 );
3564         }
3565         printk("\n");
3566 #endif /* HAVE_EEPROM */
3567
3568         /*
3569          * XXX: <hack>
3570          */
3571         sprintf(tname, "eth%d", card->index);
3572         tmp = dev_get_by_name(tname);   /* jhs: was "tmp = dev_get(tname);" */
3573         if (tmp) {
3574                 memcpy(card->atmdev->esi, tmp->dev_addr, 6);
3575
3576                 printk("%s: ESI %02x:%02x:%02x:%02x:%02x:%02x\n",
3577                        card->name, card->atmdev->esi[0], card->atmdev->esi[1],
3578                        card->atmdev->esi[2], card->atmdev->esi[3],
3579                        card->atmdev->esi[4], card->atmdev->esi[5]);
3580         }
3581         /*
3582          * XXX: </hack>
3583          */
3584
3585         /* Set Maximum Deficit Count for now. */
3586         writel(0xffff, SAR_REG_MDFCT);
3587
3588         set_bit(IDT77252_BIT_INIT, &card->flags);
3589
3590         XPRINTK("%s: IDT77252 ABR SAR initialization complete.\n", card->name);
3591         return 0;
3592 }
3593
3594
3595 /*****************************************************************************/
3596 /*                                                                           */
3597 /* Probing of IDT77252 ABR SAR                                               */
3598 /*                                                                           */
3599 /*****************************************************************************/
3600
3601
3602 static int __devinit
3603 idt77252_preset(struct idt77252_dev *card)
3604 {
3605         u16 pci_command;
3606
3607 /*****************************************************************/
3608 /*   P C I   C O N F I G U R A T I O N                           */
3609 /*****************************************************************/
3610
3611         XPRINTK("%s: Enable PCI master and memory access for SAR.\n",
3612                 card->name);
3613         if (pci_read_config_word(card->pcidev, PCI_COMMAND, &pci_command)) {
3614                 printk("%s: can't read PCI_COMMAND.\n", card->name);
3615                 deinit_card(card);
3616                 return -1;
3617         }
3618         if (!(pci_command & PCI_COMMAND_IO)) {
3619                 printk("%s: PCI_COMMAND: %04x (???)\n",
3620                        card->name, pci_command);
3621                 deinit_card(card);
3622                 return (-1);
3623         }
3624         pci_command |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
3625         if (pci_write_config_word(card->pcidev, PCI_COMMAND, pci_command)) {
3626                 printk("%s: can't write PCI_COMMAND.\n", card->name);
3627                 deinit_card(card);
3628                 return -1;
3629         }
3630 /*****************************************************************/
3631 /*   G E N E R I C   R E S E T                                   */
3632 /*****************************************************************/
3633
3634         /* Software reset */
3635         writel(SAR_CFG_SWRST, SAR_REG_CFG);
3636         mdelay(1);
3637         writel(0, SAR_REG_CFG);
3638
3639         IPRINTK("%s: Software resetted.\n", card->name);
3640         return 0;
3641 }
3642
3643
3644 static unsigned long __devinit
3645 probe_sram(struct idt77252_dev *card)
3646 {
3647         u32 data, addr;
3648
3649         writel(0, SAR_REG_DR0);
3650         writel(SAR_CMD_WRITE_SRAM | (0 << 2), SAR_REG_CMD);
3651
3652         for (addr = 0x4000; addr < 0x80000; addr += 0x4000) {
3653                 writel(ATM_POISON, SAR_REG_DR0);
3654                 writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD);
3655
3656                 writel(SAR_CMD_READ_SRAM | (0 << 2), SAR_REG_CMD);
3657                 data = readl(SAR_REG_DR0);
3658
3659                 if (data != 0)
3660                         break;
3661         }
3662
3663         return addr * sizeof(u32);
3664 }
3665
3666 static int __devinit
3667 idt77252_init_one(struct pci_dev *pcidev, const struct pci_device_id *id)
3668 {
3669         static struct idt77252_dev **last = &idt77252_chain;
3670         static int index = 0;
3671
3672         unsigned long membase, srambase;
3673         struct idt77252_dev *card;
3674         struct atm_dev *dev;
3675         ushort revision = 0;
3676         int i, err;
3677
3678
3679         if ((err = pci_enable_device(pcidev))) {
3680                 printk("idt77252: can't enable PCI device at %s\n", pci_name(pcidev));
3681                 return err;
3682         }
3683
3684         if (pci_read_config_word(pcidev, PCI_REVISION_ID, &revision)) {
3685                 printk("idt77252-%d: can't read PCI_REVISION_ID\n", index);
3686                 err = -ENODEV;
3687                 goto err_out_disable_pdev;
3688         }
3689
3690         card = kzalloc(sizeof(struct idt77252_dev), GFP_KERNEL);
3691         if (!card) {
3692                 printk("idt77252-%d: can't allocate private data\n", index);
3693                 err = -ENOMEM;
3694                 goto err_out_disable_pdev;
3695         }
3696         card->revision = revision;
3697         card->index = index;
3698         card->pcidev = pcidev;
3699         sprintf(card->name, "idt77252-%d", card->index);
3700
3701         INIT_WORK(&card->tqueue, idt77252_softint);
3702
3703         membase = pci_resource_start(pcidev, 1);
3704         srambase = pci_resource_start(pcidev, 2);
3705
3706         init_MUTEX(&card->mutex);
3707         spin_lock_init(&card->cmd_lock);
3708         spin_lock_init(&card->tst_lock);
3709
3710         init_timer(&card->tst_timer);
3711         card->tst_timer.data = (unsigned long)card;
3712         card->tst_timer.function = tst_timer;
3713
3714         /* Do the I/O remapping... */
3715         card->membase = ioremap(membase, 1024);
3716         if (!card->membase) {
3717                 printk("%s: can't ioremap() membase\n", card->name);
3718                 err = -EIO;
3719                 goto err_out_free_card;
3720         }
3721
3722         if (idt77252_preset(card)) {
3723                 printk("%s: preset failed\n", card->name);
3724                 err = -EIO;
3725                 goto err_out_iounmap;
3726         }
3727
3728         dev = atm_dev_register("idt77252", &idt77252_ops, -1, NULL);
3729         if (!dev) {
3730                 printk("%s: can't register atm device\n", card->name);
3731                 err = -EIO;
3732                 goto err_out_iounmap;
3733         }
3734         dev->dev_data = card;
3735         card->atmdev = dev;
3736
3737 #ifdef  CONFIG_ATM_IDT77252_USE_SUNI
3738         suni_init(dev);
3739         if (!dev->phy) {
3740                 printk("%s: can't init SUNI\n", card->name);
3741                 err = -EIO;
3742                 goto err_out_deinit_card;
3743         }
3744 #endif  /* CONFIG_ATM_IDT77252_USE_SUNI */
3745
3746         card->sramsize = probe_sram(card);
3747
3748         for (i = 0; i < 4; i++) {
3749                 card->fbq[i] = ioremap(srambase | 0x200000 | (i << 18), 4);
3750                 if (!card->fbq[i]) {
3751                         printk("%s: can't ioremap() FBQ%d\n", card->name, i);
3752                         err = -EIO;
3753                         goto err_out_deinit_card;
3754                 }
3755         }
3756
3757         printk("%s: ABR SAR (Rev %c): MEM %08lx SRAM %08lx [%u KB]\n",
3758                card->name, ((revision > 1) && (revision < 25)) ?
3759                'A' + revision - 1 : '?', membase, srambase,
3760                card->sramsize / 1024);
3761
3762         if (init_card(dev)) {
3763                 printk("%s: init_card failed\n", card->name);
3764                 err = -EIO;
3765                 goto err_out_deinit_card;
3766         }
3767
3768         dev->ci_range.vpi_bits = card->vpibits;
3769         dev->ci_range.vci_bits = card->vcibits;
3770         dev->link_rate = card->link_pcr;
3771
3772         if (dev->phy->start)
3773                 dev->phy->start(dev);
3774
3775         if (idt77252_dev_open(card)) {
3776                 printk("%s: dev_open failed\n", card->name);
3777                 err = -EIO;
3778                 goto err_out_stop;
3779         }
3780
3781         *last = card;
3782         last = &card->next;
3783         index++;
3784
3785         return 0;
3786
3787 err_out_stop:
3788         if (dev->phy->stop)
3789                 dev->phy->stop(dev);
3790
3791 err_out_deinit_card:
3792         deinit_card(card);
3793
3794 err_out_iounmap:
3795         iounmap(card->membase);
3796
3797 err_out_free_card:
3798         kfree(card);
3799
3800 err_out_disable_pdev:
3801         pci_disable_device(pcidev);
3802         return err;
3803 }
3804
3805 static struct pci_device_id idt77252_pci_tbl[] =
3806 {
3807         { PCI_VENDOR_ID_IDT, PCI_DEVICE_ID_IDT_IDT77252,
3808           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
3809         { 0, }
3810 };
3811
3812 MODULE_DEVICE_TABLE(pci, idt77252_pci_tbl);
3813
3814 static struct pci_driver idt77252_driver = {
3815         .name           = "idt77252",
3816         .id_table       = idt77252_pci_tbl,
3817         .probe          = idt77252_init_one,
3818 };
3819
3820 static int __init idt77252_init(void)
3821 {
3822         struct sk_buff *skb;
3823
3824         printk("%s: at %p\n", __FUNCTION__, idt77252_init);
3825
3826         if (sizeof(skb->cb) < sizeof(struct atm_skb_data) +
3827                               sizeof(struct idt77252_skb_prv)) {
3828                 printk(KERN_ERR "%s: skb->cb is too small (%lu < %lu)\n",
3829                        __FUNCTION__, (unsigned long) sizeof(skb->cb),
3830                        (unsigned long) sizeof(struct atm_skb_data) +
3831                                        sizeof(struct idt77252_skb_prv));
3832                 return -EIO;
3833         }
3834
3835         return pci_register_driver(&idt77252_driver);
3836 }
3837
3838 static void __exit idt77252_exit(void)
3839 {
3840         struct idt77252_dev *card;
3841         struct atm_dev *dev;
3842
3843         pci_unregister_driver(&idt77252_driver);
3844
3845         while (idt77252_chain) {
3846                 card = idt77252_chain;
3847                 dev = card->atmdev;
3848                 idt77252_chain = card->next;
3849
3850                 if (dev->phy->stop)
3851                         dev->phy->stop(dev);
3852                 deinit_card(card);
3853                 pci_disable_device(card->pcidev);
3854                 kfree(card);
3855         }
3856
3857         DIPRINTK("idt77252: finished cleanup-module().\n");
3858 }
3859
3860 module_init(idt77252_init);
3861 module_exit(idt77252_exit);
3862
3863 MODULE_LICENSE("GPL");
3864
3865 module_param(vpibits, uint, 0);
3866 MODULE_PARM_DESC(vpibits, "number of VPI bits supported (0, 1, or 2)");
3867 #ifdef CONFIG_ATM_IDT77252_DEBUG
3868 module_param(debug, ulong, 0644);
3869 MODULE_PARM_DESC(debug,   "debug bitmap, see drivers/atm/idt77252.h");
3870 #endif
3871
3872 MODULE_AUTHOR("Eddie C. Dost <ecd@atecom.com>");
3873 MODULE_DESCRIPTION("IDT77252 ABR SAR Driver");