1 /*******************************************************************
2 *
3 * Copyright (c) 2000 ATecoM GmbH
4 *
5 * The author may be reached at ecd@atecom.com.
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 *
12 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
13 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
14 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
15 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
16 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
17 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
18 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
19 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
20 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
21 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
22 *
23 * You should have received a copy of the GNU General Public License along
24 * with this program; if not, write to the Free Software Foundation, Inc.,
25 * 675 Mass Ave, Cambridge, MA 02139, USA.
26 *
27 *******************************************************************/
28
29 #include <linux/module.h>
30 #include <linux/pci.h>
31 #include <linux/poison.h>
32 #include <linux/skbuff.h>
33 #include <linux/kernel.h>
34 #include <linux/vmalloc.h>
35 #include <linux/netdevice.h>
36 #include <linux/atmdev.h>
37 #include <linux/atm.h>
38 #include <linux/delay.h>
39 #include <linux/init.h>
40 #include <linux/interrupt.h>
41 #include <linux/bitops.h>
42 #include <linux/wait.h>
43 #include <linux/jiffies.h>
44 #include <linux/mutex.h>
45 #include <linux/slab.h>
46
47 #include <asm/io.h>
48 #include <linux/uaccess.h>
49 #include <linux/atomic.h>
50 #include <asm/byteorder.h>
51
52 #ifdef CONFIG_ATM_IDT77252_USE_SUNI
53 #include "suni.h"
54 #endif /* CONFIG_ATM_IDT77252_USE_SUNI */
55
56
57 #include "idt77252.h"
58 #include "idt77252_tables.h"
59
60 static unsigned int vpibits = 1;
61
62
63 #define ATM_IDT77252_SEND_IDLE 1
64
65
66 /*
67 * Debug HACKs.
68 */
69 #define DEBUG_MODULE 1
70 #undef HAVE_EEPROM /* does not work, yet. */
71
72 #ifdef CONFIG_ATM_IDT77252_DEBUG
73 static unsigned long debug = DBG_GENERAL;
74 #endif
75
76
77 #define SAR_RX_DELAY (SAR_CFG_RXINT_NODELAY)
78
79
80 /*
81 * SCQ Handling.
82 */
83 static struct scq_info *alloc_scq(struct idt77252_dev *, int);
84 static void free_scq(struct idt77252_dev *, struct scq_info *);
85 static int queue_skb(struct idt77252_dev *, struct vc_map *,
86 struct sk_buff *, int oam);
87 static void drain_scq(struct idt77252_dev *, struct vc_map *);
88 static unsigned long get_free_scd(struct idt77252_dev *, struct vc_map *);
89 static void fill_scd(struct idt77252_dev *, struct scq_info *, int);
90
91 /*
92 * FBQ Handling.
93 */
94 static int push_rx_skb(struct idt77252_dev *,
95 struct sk_buff *, int queue);
96 static void recycle_rx_skb(struct idt77252_dev *, struct sk_buff *);
97 static void flush_rx_pool(struct idt77252_dev *, struct rx_pool *);
98 static void recycle_rx_pool_skb(struct idt77252_dev *,
99 struct rx_pool *);
100 static void add_rx_skb(struct idt77252_dev *, int queue,
101 unsigned int size, unsigned int count);
102
103 /*
104 * RSQ Handling.
105 */
106 static int init_rsq(struct idt77252_dev *);
107 static void deinit_rsq(struct idt77252_dev *);
108 static void idt77252_rx(struct idt77252_dev *);
109
110 /*
111 * TSQ handling.
112 */
113 static int init_tsq(struct idt77252_dev *);
114 static void deinit_tsq(struct idt77252_dev *);
115 static void idt77252_tx(struct idt77252_dev *);
116
117
118 /*
119 * ATM Interface.
120 */
121 static void idt77252_dev_close(struct atm_dev *dev);
122 static int idt77252_open(struct atm_vcc *vcc);
123 static void idt77252_close(struct atm_vcc *vcc);
124 static int idt77252_send(struct atm_vcc *vcc, struct sk_buff *skb);
125 static int idt77252_send_oam(struct atm_vcc *vcc, void *cell,
126 int flags);
127 static void idt77252_phy_put(struct atm_dev *dev, unsigned char value,
128 unsigned long addr);
129 static unsigned char idt77252_phy_get(struct atm_dev *dev, unsigned long addr);
130 static int idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos,
131 int flags);
132 static int idt77252_proc_read(struct atm_dev *dev, loff_t * pos,
133 char *page);
134 static void idt77252_softint(struct work_struct *work);
135
136
137 static const struct atmdev_ops idt77252_ops =
138 {
139 .dev_close = idt77252_dev_close,
140 .open = idt77252_open,
141 .close = idt77252_close,
142 .send = idt77252_send,
143 .send_oam = idt77252_send_oam,
144 .phy_put = idt77252_phy_put,
145 .phy_get = idt77252_phy_get,
146 .change_qos = idt77252_change_qos,
147 .proc_read = idt77252_proc_read,
148 .owner = THIS_MODULE
149 };
150
151 static struct idt77252_dev *idt77252_chain = NULL;
152 static unsigned int idt77252_sram_write_errors = 0;
153
154 /*****************************************************************************/
155 /* */
156 /* I/O and Utility Bus */
157 /* */
158 /*****************************************************************************/
159
160 static void
waitfor_idle(struct idt77252_dev * card)161 waitfor_idle(struct idt77252_dev *card)
162 {
163 u32 stat;
164
165 stat = readl(SAR_REG_STAT);
166 while (stat & SAR_STAT_CMDBZ)
167 stat = readl(SAR_REG_STAT);
168 }
169
170 static u32
read_sram(struct idt77252_dev * card,unsigned long addr)171 read_sram(struct idt77252_dev *card, unsigned long addr)
172 {
173 unsigned long flags;
174 u32 value;
175
176 spin_lock_irqsave(&card->cmd_lock, flags);
177 writel(SAR_CMD_READ_SRAM | (addr << 2), SAR_REG_CMD);
178 waitfor_idle(card);
179 value = readl(SAR_REG_DR0);
180 spin_unlock_irqrestore(&card->cmd_lock, flags);
181 return value;
182 }
183
184 static void
write_sram(struct idt77252_dev * card,unsigned long addr,u32 value)185 write_sram(struct idt77252_dev *card, unsigned long addr, u32 value)
186 {
187 unsigned long flags;
188
189 if ((idt77252_sram_write_errors == 0) &&
190 (((addr > card->tst[0] + card->tst_size - 2) &&
191 (addr < card->tst[0] + card->tst_size)) ||
192 ((addr > card->tst[1] + card->tst_size - 2) &&
193 (addr < card->tst[1] + card->tst_size)))) {
194 printk("%s: ERROR: TST JMP section at %08lx written: %08x\n",
195 card->name, addr, value);
196 }
197
198 spin_lock_irqsave(&card->cmd_lock, flags);
199 writel(value, SAR_REG_DR0);
200 writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD);
201 waitfor_idle(card);
202 spin_unlock_irqrestore(&card->cmd_lock, flags);
203 }
204
205 static u8
read_utility(void * dev,unsigned long ubus_addr)206 read_utility(void *dev, unsigned long ubus_addr)
207 {
208 struct idt77252_dev *card = dev;
209 unsigned long flags;
210 u8 value;
211
212 if (!card) {
213 printk("Error: No such device.\n");
214 return -1;
215 }
216
217 spin_lock_irqsave(&card->cmd_lock, flags);
218 writel(SAR_CMD_READ_UTILITY + ubus_addr, SAR_REG_CMD);
219 waitfor_idle(card);
220 value = readl(SAR_REG_DR0);
221 spin_unlock_irqrestore(&card->cmd_lock, flags);
222 return value;
223 }
224
225 static void
write_utility(void * dev,unsigned long ubus_addr,u8 value)226 write_utility(void *dev, unsigned long ubus_addr, u8 value)
227 {
228 struct idt77252_dev *card = dev;
229 unsigned long flags;
230
231 if (!card) {
232 printk("Error: No such device.\n");
233 return;
234 }
235
236 spin_lock_irqsave(&card->cmd_lock, flags);
237 writel((u32) value, SAR_REG_DR0);
238 writel(SAR_CMD_WRITE_UTILITY + ubus_addr, SAR_REG_CMD);
239 waitfor_idle(card);
240 spin_unlock_irqrestore(&card->cmd_lock, flags);
241 }
242
243 #ifdef HAVE_EEPROM
244 static u32 rdsrtab[] =
245 {
246 SAR_GP_EECS | SAR_GP_EESCLK,
247 0,
248 SAR_GP_EESCLK, /* 0 */
249 0,
250 SAR_GP_EESCLK, /* 0 */
251 0,
252 SAR_GP_EESCLK, /* 0 */
253 0,
254 SAR_GP_EESCLK, /* 0 */
255 0,
256 SAR_GP_EESCLK, /* 0 */
257 SAR_GP_EEDO,
258 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
259 0,
260 SAR_GP_EESCLK, /* 0 */
261 SAR_GP_EEDO,
262 SAR_GP_EESCLK | SAR_GP_EEDO /* 1 */
263 };
264
265 static u32 wrentab[] =
266 {
267 SAR_GP_EECS | SAR_GP_EESCLK,
268 0,
269 SAR_GP_EESCLK, /* 0 */
270 0,
271 SAR_GP_EESCLK, /* 0 */
272 0,
273 SAR_GP_EESCLK, /* 0 */
274 0,
275 SAR_GP_EESCLK, /* 0 */
276 SAR_GP_EEDO,
277 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
278 SAR_GP_EEDO,
279 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
280 0,
281 SAR_GP_EESCLK, /* 0 */
282 0,
283 SAR_GP_EESCLK /* 0 */
284 };
285
286 static u32 rdtab[] =
287 {
288 SAR_GP_EECS | SAR_GP_EESCLK,
289 0,
290 SAR_GP_EESCLK, /* 0 */
291 0,
292 SAR_GP_EESCLK, /* 0 */
293 0,
294 SAR_GP_EESCLK, /* 0 */
295 0,
296 SAR_GP_EESCLK, /* 0 */
297 0,
298 SAR_GP_EESCLK, /* 0 */
299 0,
300 SAR_GP_EESCLK, /* 0 */
301 SAR_GP_EEDO,
302 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
303 SAR_GP_EEDO,
304 SAR_GP_EESCLK | SAR_GP_EEDO /* 1 */
305 };
306
307 static u32 wrtab[] =
308 {
309 SAR_GP_EECS | SAR_GP_EESCLK,
310 0,
311 SAR_GP_EESCLK, /* 0 */
312 0,
313 SAR_GP_EESCLK, /* 0 */
314 0,
315 SAR_GP_EESCLK, /* 0 */
316 0,
317 SAR_GP_EESCLK, /* 0 */
318 0,
319 SAR_GP_EESCLK, /* 0 */
320 0,
321 SAR_GP_EESCLK, /* 0 */
322 SAR_GP_EEDO,
323 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
324 0,
325 SAR_GP_EESCLK /* 0 */
326 };
327
328 static u32 clktab[] =
329 {
330 0,
331 SAR_GP_EESCLK,
332 0,
333 SAR_GP_EESCLK,
334 0,
335 SAR_GP_EESCLK,
336 0,
337 SAR_GP_EESCLK,
338 0,
339 SAR_GP_EESCLK,
340 0,
341 SAR_GP_EESCLK,
342 0,
343 SAR_GP_EESCLK,
344 0,
345 SAR_GP_EESCLK,
346 0
347 };
348
349 static u32
idt77252_read_gp(struct idt77252_dev * card)350 idt77252_read_gp(struct idt77252_dev *card)
351 {
352 u32 gp;
353
354 gp = readl(SAR_REG_GP);
355 #if 0
356 printk("RD: %s\n", gp & SAR_GP_EEDI ? "1" : "0");
357 #endif
358 return gp;
359 }
360
361 static void
idt77252_write_gp(struct idt77252_dev * card,u32 value)362 idt77252_write_gp(struct idt77252_dev *card, u32 value)
363 {
364 unsigned long flags;
365
366 #if 0
367 printk("WR: %s %s %s\n", value & SAR_GP_EECS ? " " : "/CS",
368 value & SAR_GP_EESCLK ? "HIGH" : "LOW ",
369 value & SAR_GP_EEDO ? "1" : "0");
370 #endif
371
372 spin_lock_irqsave(&card->cmd_lock, flags);
373 waitfor_idle(card);
374 writel(value, SAR_REG_GP);
375 spin_unlock_irqrestore(&card->cmd_lock, flags);
376 }
377
378 static u8
idt77252_eeprom_read_status(struct idt77252_dev * card)379 idt77252_eeprom_read_status(struct idt77252_dev *card)
380 {
381 u8 byte;
382 u32 gp;
383 int i, j;
384
385 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
386
387 for (i = 0; i < ARRAY_SIZE(rdsrtab); i++) {
388 idt77252_write_gp(card, gp | rdsrtab[i]);
389 udelay(5);
390 }
391 idt77252_write_gp(card, gp | SAR_GP_EECS);
392 udelay(5);
393
394 byte = 0;
395 for (i = 0, j = 0; i < 8; i++) {
396 byte <<= 1;
397
398 idt77252_write_gp(card, gp | clktab[j++]);
399 udelay(5);
400
401 byte |= idt77252_read_gp(card) & SAR_GP_EEDI ? 1 : 0;
402
403 idt77252_write_gp(card, gp | clktab[j++]);
404 udelay(5);
405 }
406 idt77252_write_gp(card, gp | SAR_GP_EECS);
407 udelay(5);
408
409 return byte;
410 }
411
412 static u8
idt77252_eeprom_read_byte(struct idt77252_dev * card,u8 offset)413 idt77252_eeprom_read_byte(struct idt77252_dev *card, u8 offset)
414 {
415 u8 byte;
416 u32 gp;
417 int i, j;
418
419 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
420
421 for (i = 0; i < ARRAY_SIZE(rdtab); i++) {
422 idt77252_write_gp(card, gp | rdtab[i]);
423 udelay(5);
424 }
425 idt77252_write_gp(card, gp | SAR_GP_EECS);
426 udelay(5);
427
428 for (i = 0, j = 0; i < 8; i++) {
429 idt77252_write_gp(card, gp | clktab[j++] |
430 (offset & 1 ? SAR_GP_EEDO : 0));
431 udelay(5);
432
433 idt77252_write_gp(card, gp | clktab[j++] |
434 (offset & 1 ? SAR_GP_EEDO : 0));
435 udelay(5);
436
437 offset >>= 1;
438 }
439 idt77252_write_gp(card, gp | SAR_GP_EECS);
440 udelay(5);
441
442 byte = 0;
443 for (i = 0, j = 0; i < 8; i++) {
444 byte <<= 1;
445
446 idt77252_write_gp(card, gp | clktab[j++]);
447 udelay(5);
448
449 byte |= idt77252_read_gp(card) & SAR_GP_EEDI ? 1 : 0;
450
451 idt77252_write_gp(card, gp | clktab[j++]);
452 udelay(5);
453 }
454 idt77252_write_gp(card, gp | SAR_GP_EECS);
455 udelay(5);
456
457 return byte;
458 }
459
460 static void
idt77252_eeprom_write_byte(struct idt77252_dev * card,u8 offset,u8 data)461 idt77252_eeprom_write_byte(struct idt77252_dev *card, u8 offset, u8 data)
462 {
463 u32 gp;
464 int i, j;
465
466 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
467
468 for (i = 0; i < ARRAY_SIZE(wrentab); i++) {
469 idt77252_write_gp(card, gp | wrentab[i]);
470 udelay(5);
471 }
472 idt77252_write_gp(card, gp | SAR_GP_EECS);
473 udelay(5);
474
475 for (i = 0; i < ARRAY_SIZE(wrtab); i++) {
476 idt77252_write_gp(card, gp | wrtab[i]);
477 udelay(5);
478 }
479 idt77252_write_gp(card, gp | SAR_GP_EECS);
480 udelay(5);
481
482 for (i = 0, j = 0; i < 8; i++) {
483 idt77252_write_gp(card, gp | clktab[j++] |
484 (offset & 1 ? SAR_GP_EEDO : 0));
485 udelay(5);
486
487 idt77252_write_gp(card, gp | clktab[j++] |
488 (offset & 1 ? SAR_GP_EEDO : 0));
489 udelay(5);
490
491 offset >>= 1;
492 }
493 idt77252_write_gp(card, gp | SAR_GP_EECS);
494 udelay(5);
495
496 for (i = 0, j = 0; i < 8; i++) {
497 idt77252_write_gp(card, gp | clktab[j++] |
498 (data & 1 ? SAR_GP_EEDO : 0));
499 udelay(5);
500
501 idt77252_write_gp(card, gp | clktab[j++] |
502 (data & 1 ? SAR_GP_EEDO : 0));
503 udelay(5);
504
505 data >>= 1;
506 }
507 idt77252_write_gp(card, gp | SAR_GP_EECS);
508 udelay(5);
509 }
510
511 static void
idt77252_eeprom_init(struct idt77252_dev * card)512 idt77252_eeprom_init(struct idt77252_dev *card)
513 {
514 u32 gp;
515
516 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
517
518 idt77252_write_gp(card, gp | SAR_GP_EECS | SAR_GP_EESCLK);
519 udelay(5);
520 idt77252_write_gp(card, gp | SAR_GP_EECS);
521 udelay(5);
522 idt77252_write_gp(card, gp | SAR_GP_EECS | SAR_GP_EESCLK);
523 udelay(5);
524 idt77252_write_gp(card, gp | SAR_GP_EECS);
525 udelay(5);
526 }
527 #endif /* HAVE_EEPROM */
528
529
530 #ifdef CONFIG_ATM_IDT77252_DEBUG
531 static void
dump_tct(struct idt77252_dev * card,int index)532 dump_tct(struct idt77252_dev *card, int index)
533 {
534 unsigned long tct;
535 int i;
536
537 tct = (unsigned long) (card->tct_base + index * SAR_SRAM_TCT_SIZE);
538
539 printk("%s: TCT %x:", card->name, index);
540 for (i = 0; i < 8; i++) {
541 printk(" %08x", read_sram(card, tct + i));
542 }
543 printk("\n");
544 }
545
546 static void
idt77252_tx_dump(struct idt77252_dev * card)547 idt77252_tx_dump(struct idt77252_dev *card)
548 {
549 struct atm_vcc *vcc;
550 struct vc_map *vc;
551 int i;
552
553 printk("%s\n", __func__);
554 for (i = 0; i < card->tct_size; i++) {
555 vc = card->vcs[i];
556 if (!vc)
557 continue;
558
559 vcc = NULL;
560 if (vc->rx_vcc)
561 vcc = vc->rx_vcc;
562 else if (vc->tx_vcc)
563 vcc = vc->tx_vcc;
564
565 if (!vcc)
566 continue;
567
568 printk("%s: Connection %d:\n", card->name, vc->index);
569 dump_tct(card, vc->index);
570 }
571 }
572 #endif
573
574
575 /*****************************************************************************/
576 /* */
577 /* SCQ Handling */
578 /* */
579 /*****************************************************************************/
580
581 static int
sb_pool_add(struct idt77252_dev * card,struct sk_buff * skb,int queue)582 sb_pool_add(struct idt77252_dev *card, struct sk_buff *skb, int queue)
583 {
584 struct sb_pool *pool = &card->sbpool[queue];
585 int index;
586
587 index = pool->index;
588 while (pool->skb[index]) {
589 index = (index + 1) & FBQ_MASK;
590 if (index == pool->index)
591 return -ENOBUFS;
592 }
593
594 pool->skb[index] = skb;
595 IDT77252_PRV_POOL(skb) = POOL_HANDLE(queue, index);
596
597 pool->index = (index + 1) & FBQ_MASK;
598 return 0;
599 }
600
601 static void
sb_pool_remove(struct idt77252_dev * card,struct sk_buff * skb)602 sb_pool_remove(struct idt77252_dev *card, struct sk_buff *skb)
603 {
604 unsigned int queue, index;
605 u32 handle;
606
607 handle = IDT77252_PRV_POOL(skb);
608
609 queue = POOL_QUEUE(handle);
610 if (queue > 3)
611 return;
612
613 index = POOL_INDEX(handle);
614 if (index > FBQ_SIZE - 1)
615 return;
616
617 card->sbpool[queue].skb[index] = NULL;
618 }
619
620 static struct sk_buff *
sb_pool_skb(struct idt77252_dev * card,u32 handle)621 sb_pool_skb(struct idt77252_dev *card, u32 handle)
622 {
623 unsigned int queue, index;
624
625 queue = POOL_QUEUE(handle);
626 if (queue > 3)
627 return NULL;
628
629 index = POOL_INDEX(handle);
630 if (index > FBQ_SIZE - 1)
631 return NULL;
632
633 return card->sbpool[queue].skb[index];
634 }
635
636 static struct scq_info *
alloc_scq(struct idt77252_dev * card,int class)637 alloc_scq(struct idt77252_dev *card, int class)
638 {
639 struct scq_info *scq;
640
641 scq = kzalloc(sizeof(struct scq_info), GFP_KERNEL);
642 if (!scq)
643 return NULL;
644 scq->base = dma_alloc_coherent(&card->pcidev->dev, SCQ_SIZE,
645 &scq->paddr, GFP_KERNEL);
646 if (scq->base == NULL) {
647 kfree(scq);
648 return NULL;
649 }
650
651 scq->next = scq->base;
652 scq->last = scq->base + (SCQ_ENTRIES - 1);
653 atomic_set(&scq->used, 0);
654
655 spin_lock_init(&scq->lock);
656 spin_lock_init(&scq->skblock);
657
658 skb_queue_head_init(&scq->transmit);
659 skb_queue_head_init(&scq->pending);
660
661 TXPRINTK("idt77252: SCQ: base 0x%p, next 0x%p, last 0x%p, paddr %08llx\n",
662 scq->base, scq->next, scq->last, (unsigned long long)scq->paddr);
663
664 return scq;
665 }
666
667 static void
free_scq(struct idt77252_dev * card,struct scq_info * scq)668 free_scq(struct idt77252_dev *card, struct scq_info *scq)
669 {
670 struct sk_buff *skb;
671 struct atm_vcc *vcc;
672
673 dma_free_coherent(&card->pcidev->dev, SCQ_SIZE,
674 scq->base, scq->paddr);
675
676 while ((skb = skb_dequeue(&scq->transmit))) {
677 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
678 skb->len, DMA_TO_DEVICE);
679
680 vcc = ATM_SKB(skb)->vcc;
681 if (vcc->pop)
682 vcc->pop(vcc, skb);
683 else
684 dev_kfree_skb(skb);
685 }
686
687 while ((skb = skb_dequeue(&scq->pending))) {
688 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
689 skb->len, DMA_TO_DEVICE);
690
691 vcc = ATM_SKB(skb)->vcc;
692 if (vcc->pop)
693 vcc->pop(vcc, skb);
694 else
695 dev_kfree_skb(skb);
696 }
697
698 kfree(scq);
699 }
700
701
702 static int
push_on_scq(struct idt77252_dev * card,struct vc_map * vc,struct sk_buff * skb)703 push_on_scq(struct idt77252_dev *card, struct vc_map *vc, struct sk_buff *skb)
704 {
705 struct scq_info *scq = vc->scq;
706 unsigned long flags;
707 struct scqe *tbd;
708 int entries;
709
710 TXPRINTK("%s: SCQ: next 0x%p\n", card->name, scq->next);
711
712 atomic_inc(&scq->used);
713 entries = atomic_read(&scq->used);
714 if (entries > (SCQ_ENTRIES - 1)) {
715 atomic_dec(&scq->used);
716 goto out;
717 }
718
719 skb_queue_tail(&scq->transmit, skb);
720
721 spin_lock_irqsave(&vc->lock, flags);
722 if (vc->estimator) {
723 struct atm_vcc *vcc = vc->tx_vcc;
724 struct sock *sk = sk_atm(vcc);
725
726 vc->estimator->cells += (skb->len + 47) / 48;
727 if (refcount_read(&sk->sk_wmem_alloc) >
728 (sk->sk_sndbuf >> 1)) {
729 u32 cps = vc->estimator->maxcps;
730
731 vc->estimator->cps = cps;
732 vc->estimator->avcps = cps << 5;
733 if (vc->lacr < vc->init_er) {
734 vc->lacr = vc->init_er;
735 writel(TCMDQ_LACR | (vc->lacr << 16) |
736 vc->index, SAR_REG_TCMDQ);
737 }
738 }
739 }
740 spin_unlock_irqrestore(&vc->lock, flags);
741
742 tbd = &IDT77252_PRV_TBD(skb);
743
744 spin_lock_irqsave(&scq->lock, flags);
745 scq->next->word_1 = cpu_to_le32(tbd->word_1 |
746 SAR_TBD_TSIF | SAR_TBD_GTSI);
747 scq->next->word_2 = cpu_to_le32(tbd->word_2);
748 scq->next->word_3 = cpu_to_le32(tbd->word_3);
749 scq->next->word_4 = cpu_to_le32(tbd->word_4);
750
751 if (scq->next == scq->last)
752 scq->next = scq->base;
753 else
754 scq->next++;
755
756 write_sram(card, scq->scd,
757 scq->paddr +
758 (u32)((unsigned long)scq->next - (unsigned long)scq->base));
759 spin_unlock_irqrestore(&scq->lock, flags);
760
761 scq->trans_start = jiffies;
762
763 if (test_and_clear_bit(VCF_IDLE, &vc->flags)) {
764 writel(TCMDQ_START_LACR | (vc->lacr << 16) | vc->index,
765 SAR_REG_TCMDQ);
766 }
767
768 TXPRINTK("%d entries in SCQ used (push).\n", atomic_read(&scq->used));
769
770 XPRINTK("%s: SCQ (after push %2d) head = 0x%x, next = 0x%p.\n",
771 card->name, atomic_read(&scq->used),
772 read_sram(card, scq->scd + 1), scq->next);
773
774 return 0;
775
776 out:
777 if (time_after(jiffies, scq->trans_start + HZ)) {
778 printk("%s: Error pushing TBD for %d.%d\n",
779 card->name, vc->tx_vcc->vpi, vc->tx_vcc->vci);
780 #ifdef CONFIG_ATM_IDT77252_DEBUG
781 idt77252_tx_dump(card);
782 #endif
783 scq->trans_start = jiffies;
784 }
785
786 return -ENOBUFS;
787 }
788
789
790 static void
drain_scq(struct idt77252_dev * card,struct vc_map * vc)791 drain_scq(struct idt77252_dev *card, struct vc_map *vc)
792 {
793 struct scq_info *scq = vc->scq;
794 struct sk_buff *skb;
795 struct atm_vcc *vcc;
796
797 TXPRINTK("%s: SCQ (before drain %2d) next = 0x%p.\n",
798 card->name, atomic_read(&scq->used), scq->next);
799
800 skb = skb_dequeue(&scq->transmit);
801 if (skb) {
802 TXPRINTK("%s: freeing skb at %p.\n", card->name, skb);
803
804 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
805 skb->len, DMA_TO_DEVICE);
806
807 vcc = ATM_SKB(skb)->vcc;
808
809 if (vcc->pop)
810 vcc->pop(vcc, skb);
811 else
812 dev_kfree_skb(skb);
813
814 atomic_inc(&vcc->stats->tx);
815 }
816
817 atomic_dec(&scq->used);
818
819 spin_lock(&scq->skblock);
820 while ((skb = skb_dequeue(&scq->pending))) {
821 if (push_on_scq(card, vc, skb)) {
822 skb_queue_head(&vc->scq->pending, skb);
823 break;
824 }
825 }
826 spin_unlock(&scq->skblock);
827 }
828
829 static int
queue_skb(struct idt77252_dev * card,struct vc_map * vc,struct sk_buff * skb,int oam)830 queue_skb(struct idt77252_dev *card, struct vc_map *vc,
831 struct sk_buff *skb, int oam)
832 {
833 struct atm_vcc *vcc;
834 struct scqe *tbd;
835 unsigned long flags;
836 int error;
837 int aal;
838 u32 word4;
839
840 if (skb->len == 0) {
841 printk("%s: invalid skb->len (%d)\n", card->name, skb->len);
842 return -EINVAL;
843 }
844
845 TXPRINTK("%s: Sending %d bytes of data.\n",
846 card->name, skb->len);
847
848 tbd = &IDT77252_PRV_TBD(skb);
849 vcc = ATM_SKB(skb)->vcc;
850 word4 = (skb->data[0] << 24) | (skb->data[1] << 16) |
851 (skb->data[2] << 8) | (skb->data[3] << 0);
852
853 IDT77252_PRV_PADDR(skb) = dma_map_single(&card->pcidev->dev, skb->data,
854 skb->len, DMA_TO_DEVICE);
855
856 error = -EINVAL;
857
858 if (oam) {
859 if (skb->len != 52)
860 goto errout;
861
862 tbd->word_1 = SAR_TBD_OAM | ATM_CELL_PAYLOAD | SAR_TBD_EPDU;
863 tbd->word_2 = IDT77252_PRV_PADDR(skb) + 4;
864 tbd->word_3 = 0x00000000;
865 tbd->word_4 = word4;
866
867 if (test_bit(VCF_RSV, &vc->flags))
868 vc = card->vcs[0];
869
870 goto done;
871 }
872
873 if (test_bit(VCF_RSV, &vc->flags)) {
874 printk("%s: Trying to transmit on reserved VC\n", card->name);
875 goto errout;
876 }
877
878 aal = vcc->qos.aal;
879
880 switch (aal) {
881 case ATM_AAL0:
882 case ATM_AAL34:
883 if (skb->len > 52)
884 goto errout;
885
886 if (aal == ATM_AAL0)
887 tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL0 |
888 ATM_CELL_PAYLOAD;
889 else
890 tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL34 |
891 ATM_CELL_PAYLOAD;
892
893 tbd->word_2 = IDT77252_PRV_PADDR(skb) + 4;
894 tbd->word_3 = 0x00000000;
895 tbd->word_4 = word4;
896 break;
897
898 case ATM_AAL5:
899 tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL5 | skb->len;
900 tbd->word_2 = IDT77252_PRV_PADDR(skb);
901 tbd->word_3 = skb->len;
902 tbd->word_4 = (vcc->vpi << SAR_TBD_VPI_SHIFT) |
903 (vcc->vci << SAR_TBD_VCI_SHIFT);
904 break;
905
906 case ATM_AAL1:
907 case ATM_AAL2:
908 default:
909 printk("%s: Traffic type not supported.\n", card->name);
910 error = -EPROTONOSUPPORT;
911 goto errout;
912 }
913
914 done:
915 spin_lock_irqsave(&vc->scq->skblock, flags);
916 skb_queue_tail(&vc->scq->pending, skb);
917
918 while ((skb = skb_dequeue(&vc->scq->pending))) {
919 if (push_on_scq(card, vc, skb)) {
920 skb_queue_head(&vc->scq->pending, skb);
921 break;
922 }
923 }
924 spin_unlock_irqrestore(&vc->scq->skblock, flags);
925
926 return 0;
927
928 errout:
929 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
930 skb->len, DMA_TO_DEVICE);
931 return error;
932 }
933
934 static unsigned long
get_free_scd(struct idt77252_dev * card,struct vc_map * vc)935 get_free_scd(struct idt77252_dev *card, struct vc_map *vc)
936 {
937 int i;
938
939 for (i = 0; i < card->scd_size; i++) {
940 if (!card->scd2vc[i]) {
941 card->scd2vc[i] = vc;
942 vc->scd_index = i;
943 return card->scd_base + i * SAR_SRAM_SCD_SIZE;
944 }
945 }
946 return 0;
947 }
948
949 static void
fill_scd(struct idt77252_dev * card,struct scq_info * scq,int class)950 fill_scd(struct idt77252_dev *card, struct scq_info *scq, int class)
951 {
952 write_sram(card, scq->scd, scq->paddr);
953 write_sram(card, scq->scd + 1, 0x00000000);
954 write_sram(card, scq->scd + 2, 0xffffffff);
955 write_sram(card, scq->scd + 3, 0x00000000);
956 }
957
958 static void
clear_scd(struct idt77252_dev * card,struct scq_info * scq,int class)959 clear_scd(struct idt77252_dev *card, struct scq_info *scq, int class)
960 {
961 return;
962 }
963
964 /*****************************************************************************/
965 /* */
966 /* RSQ Handling */
967 /* */
968 /*****************************************************************************/
969
970 static int
init_rsq(struct idt77252_dev * card)971 init_rsq(struct idt77252_dev *card)
972 {
973 struct rsq_entry *rsqe;
974
975 card->rsq.base = dma_alloc_coherent(&card->pcidev->dev, RSQSIZE,
976 &card->rsq.paddr, GFP_KERNEL);
977 if (card->rsq.base == NULL) {
978 printk("%s: can't allocate RSQ.\n", card->name);
979 return -1;
980 }
981
982 card->rsq.last = card->rsq.base + RSQ_NUM_ENTRIES - 1;
983 card->rsq.next = card->rsq.last;
984 for (rsqe = card->rsq.base; rsqe <= card->rsq.last; rsqe++)
985 rsqe->word_4 = 0;
986
987 writel((unsigned long) card->rsq.last - (unsigned long) card->rsq.base,
988 SAR_REG_RSQH);
989 writel(card->rsq.paddr, SAR_REG_RSQB);
990
991 IPRINTK("%s: RSQ base at 0x%lx (0x%x).\n", card->name,
992 (unsigned long) card->rsq.base,
993 readl(SAR_REG_RSQB));
994 IPRINTK("%s: RSQ head = 0x%x, base = 0x%x, tail = 0x%x.\n",
995 card->name,
996 readl(SAR_REG_RSQH),
997 readl(SAR_REG_RSQB),
998 readl(SAR_REG_RSQT));
999
1000 return 0;
1001 }
1002
1003 static void
deinit_rsq(struct idt77252_dev * card)1004 deinit_rsq(struct idt77252_dev *card)
1005 {
1006 dma_free_coherent(&card->pcidev->dev, RSQSIZE,
1007 card->rsq.base, card->rsq.paddr);
1008 }
1009
1010 static void
dequeue_rx(struct idt77252_dev * card,struct rsq_entry * rsqe)1011 dequeue_rx(struct idt77252_dev *card, struct rsq_entry *rsqe)
1012 {
1013 struct atm_vcc *vcc;
1014 struct sk_buff *skb;
1015 struct rx_pool *rpp;
1016 struct vc_map *vc;
1017 u32 header, vpi, vci;
1018 u32 stat;
1019 int i;
1020
1021 stat = le32_to_cpu(rsqe->word_4);
1022
1023 if (stat & SAR_RSQE_IDLE) {
1024 RXPRINTK("%s: message about inactive connection.\n",
1025 card->name);
1026 return;
1027 }
1028
1029 skb = sb_pool_skb(card, le32_to_cpu(rsqe->word_2));
1030 if (skb == NULL) {
1031 printk("%s: NULL skb in %s, rsqe: %08x %08x %08x %08x\n",
1032 card->name, __func__,
1033 le32_to_cpu(rsqe->word_1), le32_to_cpu(rsqe->word_2),
1034 le32_to_cpu(rsqe->word_3), le32_to_cpu(rsqe->word_4));
1035 return;
1036 }
1037
1038 header = le32_to_cpu(rsqe->word_1);
1039 vpi = (header >> 16) & 0x00ff;
1040 vci = (header >> 0) & 0xffff;
1041
1042 RXPRINTK("%s: SDU for %d.%d received in buffer 0x%p (data 0x%p).\n",
1043 card->name, vpi, vci, skb, skb->data);
1044
1045 if ((vpi >= (1 << card->vpibits)) || (vci != (vci & card->vcimask))) {
1046 printk("%s: SDU received for out-of-range vc %u.%u\n",
1047 card->name, vpi, vci);
1048 recycle_rx_skb(card, skb);
1049 return;
1050 }
1051
1052 vc = card->vcs[VPCI2VC(card, vpi, vci)];
1053 if (!vc || !test_bit(VCF_RX, &vc->flags)) {
1054 printk("%s: SDU received on non RX vc %u.%u\n",
1055 card->name, vpi, vci);
1056 recycle_rx_skb(card, skb);
1057 return;
1058 }
1059
1060 vcc = vc->rx_vcc;
1061
1062 dma_sync_single_for_cpu(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
1063 skb_end_pointer(skb) - skb->data,
1064 DMA_FROM_DEVICE);
1065
1066 if ((vcc->qos.aal == ATM_AAL0) ||
1067 (vcc->qos.aal == ATM_AAL34)) {
1068 struct sk_buff *sb;
1069 unsigned char *cell;
1070 u32 aal0;
1071
1072 cell = skb->data;
1073 for (i = (stat & SAR_RSQE_CELLCNT); i; i--) {
1074 if ((sb = dev_alloc_skb(64)) == NULL) {
1075 printk("%s: Can't allocate buffers for aal0.\n",
1076 card->name);
1077 atomic_add(i, &vcc->stats->rx_drop);
1078 break;
1079 }
1080 if (!atm_charge(vcc, sb->truesize)) {
1081 RXPRINTK("%s: atm_charge() dropped aal0 packets.\n",
1082 card->name);
1083 atomic_add(i - 1, &vcc->stats->rx_drop);
1084 dev_kfree_skb(sb);
1085 break;
1086 }
1087 aal0 = (vpi << ATM_HDR_VPI_SHIFT) |
1088 (vci << ATM_HDR_VCI_SHIFT);
1089 aal0 |= (stat & SAR_RSQE_EPDU) ? 0x00000002 : 0;
1090 aal0 |= (stat & SAR_RSQE_CLP) ? 0x00000001 : 0;
1091
1092 *((u32 *) sb->data) = aal0;
1093 skb_put(sb, sizeof(u32));
1094 skb_put_data(sb, cell, ATM_CELL_PAYLOAD);
1095
1096 ATM_SKB(sb)->vcc = vcc;
1097 __net_timestamp(sb);
1098 vcc->push(vcc, sb);
1099 atomic_inc(&vcc->stats->rx);
1100
1101 cell += ATM_CELL_PAYLOAD;
1102 }
1103
1104 recycle_rx_skb(card, skb);
1105 return;
1106 }
1107 if (vcc->qos.aal != ATM_AAL5) {
1108 printk("%s: Unexpected AAL type in dequeue_rx(): %d.\n",
1109 card->name, vcc->qos.aal);
1110 recycle_rx_skb(card, skb);
1111 return;
1112 }
1113 skb->len = (stat & SAR_RSQE_CELLCNT) * ATM_CELL_PAYLOAD;
1114
1115 rpp = &vc->rcv.rx_pool;
1116
1117 __skb_queue_tail(&rpp->queue, skb);
1118 rpp->len += skb->len;
1119
1120 if (stat & SAR_RSQE_EPDU) {
1121 unsigned char *l1l2;
1122 unsigned int len;
1123
1124 l1l2 = (unsigned char *) ((unsigned long) skb->data + skb->len - 6);
1125
1126 len = (l1l2[0] << 8) | l1l2[1];
1127 len = len ? len : 0x10000;
1128
1129 RXPRINTK("%s: PDU has %d bytes.\n", card->name, len);
1130
1131 if ((len + 8 > rpp->len) || (len + (47 + 8) < rpp->len)) {
1132 RXPRINTK("%s: AAL5 PDU size mismatch: %d != %d. "
1133 "(CDC: %08x)\n",
1134 card->name, len, rpp->len, readl(SAR_REG_CDC));
1135 recycle_rx_pool_skb(card, rpp);
1136 atomic_inc(&vcc->stats->rx_err);
1137 return;
1138 }
1139 if (stat & SAR_RSQE_CRC) {
1140 RXPRINTK("%s: AAL5 CRC error.\n", card->name);
1141 recycle_rx_pool_skb(card, rpp);
1142 atomic_inc(&vcc->stats->rx_err);
1143 return;
1144 }
1145 if (skb_queue_len(&rpp->queue) > 1) {
1146 struct sk_buff *sb;
1147
1148 skb = dev_alloc_skb(rpp->len);
1149 if (!skb) {
1150 RXPRINTK("%s: Can't alloc RX skb.\n",
1151 card->name);
1152 recycle_rx_pool_skb(card, rpp);
1153 atomic_inc(&vcc->stats->rx_err);
1154 return;
1155 }
1156 if (!atm_charge(vcc, skb->truesize)) {
1157 recycle_rx_pool_skb(card, rpp);
1158 dev_kfree_skb(skb);
1159 return;
1160 }
1161 skb_queue_walk(&rpp->queue, sb)
1162 skb_put_data(skb, sb->data, sb->len);
1163
1164 recycle_rx_pool_skb(card, rpp);
1165
1166 skb_trim(skb, len);
1167 ATM_SKB(skb)->vcc = vcc;
1168 __net_timestamp(skb);
1169
1170 vcc->push(vcc, skb);
1171 atomic_inc(&vcc->stats->rx);
1172
1173 return;
1174 }
1175
1176 flush_rx_pool(card, rpp);
1177
1178 if (!atm_charge(vcc, skb->truesize)) {
1179 recycle_rx_skb(card, skb);
1180 return;
1181 }
1182
1183 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
1184 skb_end_pointer(skb) - skb->data,
1185 DMA_FROM_DEVICE);
1186 sb_pool_remove(card, skb);
1187
1188 skb_trim(skb, len);
1189 ATM_SKB(skb)->vcc = vcc;
1190 __net_timestamp(skb);
1191
1192 vcc->push(vcc, skb);
1193 atomic_inc(&vcc->stats->rx);
1194
1195 if (skb->truesize > SAR_FB_SIZE_3)
1196 add_rx_skb(card, 3, SAR_FB_SIZE_3, 1);
1197 else if (skb->truesize > SAR_FB_SIZE_2)
1198 add_rx_skb(card, 2, SAR_FB_SIZE_2, 1);
1199 else if (skb->truesize > SAR_FB_SIZE_1)
1200 add_rx_skb(card, 1, SAR_FB_SIZE_1, 1);
1201 else
1202 add_rx_skb(card, 0, SAR_FB_SIZE_0, 1);
1203 return;
1204 }
1205 }
1206
1207 static void
idt77252_rx(struct idt77252_dev * card)1208 idt77252_rx(struct idt77252_dev *card)
1209 {
1210 struct rsq_entry *rsqe;
1211
1212 if (card->rsq.next == card->rsq.last)
1213 rsqe = card->rsq.base;
1214 else
1215 rsqe = card->rsq.next + 1;
1216
1217 if (!(le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID)) {
1218 RXPRINTK("%s: no entry in RSQ.\n", card->name);
1219 return;
1220 }
1221
1222 do {
1223 dequeue_rx(card, rsqe);
1224 rsqe->word_4 = 0;
1225 card->rsq.next = rsqe;
1226 if (card->rsq.next == card->rsq.last)
1227 rsqe = card->rsq.base;
1228 else
1229 rsqe = card->rsq.next + 1;
1230 } while (le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID);
1231
1232 writel((unsigned long) card->rsq.next - (unsigned long) card->rsq.base,
1233 SAR_REG_RSQH);
1234 }
1235
1236 static void
idt77252_rx_raw(struct idt77252_dev * card)1237 idt77252_rx_raw(struct idt77252_dev *card)
1238 {
1239 struct sk_buff *queue;
1240 u32 head, tail;
1241 struct atm_vcc *vcc;
1242 struct vc_map *vc;
1243 struct sk_buff *sb;
1244
1245 if (card->raw_cell_head == NULL) {
1246 u32 handle = le32_to_cpu(*(card->raw_cell_hnd + 1));
1247 card->raw_cell_head = sb_pool_skb(card, handle);
1248 }
1249
1250 queue = card->raw_cell_head;
1251 if (!queue)
1252 return;
1253
1254 head = IDT77252_PRV_PADDR(queue) + (queue->data - queue->head - 16);
1255 tail = readl(SAR_REG_RAWCT);
1256
1257 dma_sync_single_for_cpu(&card->pcidev->dev, IDT77252_PRV_PADDR(queue),
1258 skb_end_offset(queue) - 16,
1259 DMA_FROM_DEVICE);
1260
1261 while (head != tail) {
1262 unsigned int vpi, vci;
1263 u32 header;
1264
1265 header = le32_to_cpu(*(u32 *) &queue->data[0]);
1266
1267 vpi = (header & ATM_HDR_VPI_MASK) >> ATM_HDR_VPI_SHIFT;
1268 vci = (header & ATM_HDR_VCI_MASK) >> ATM_HDR_VCI_SHIFT;
1269
1270 #ifdef CONFIG_ATM_IDT77252_DEBUG
1271 if (debug & DBG_RAW_CELL) {
1272 int i;
1273
1274 printk("%s: raw cell %x.%02x.%04x.%x.%x\n",
1275 card->name, (header >> 28) & 0x000f,
1276 (header >> 20) & 0x00ff,
1277 (header >> 4) & 0xffff,
1278 (header >> 1) & 0x0007,
1279 (header >> 0) & 0x0001);
1280 for (i = 16; i < 64; i++)
1281 printk(" %02x", queue->data[i]);
1282 printk("\n");
1283 }
1284 #endif
1285
1286 if (vpi >= (1<<card->vpibits) || vci >= (1<<card->vcibits)) {
1287 RPRINTK("%s: SDU received for out-of-range vc %u.%u\n",
1288 card->name, vpi, vci);
1289 goto drop;
1290 }
1291
1292 vc = card->vcs[VPCI2VC(card, vpi, vci)];
1293 if (!vc || !test_bit(VCF_RX, &vc->flags)) {
1294 RPRINTK("%s: SDU received on non RX vc %u.%u\n",
1295 card->name, vpi, vci);
1296 goto drop;
1297 }
1298
1299 vcc = vc->rx_vcc;
1300
1301 if (vcc->qos.aal != ATM_AAL0) {
1302 RPRINTK("%s: raw cell for non AAL0 vc %u.%u\n",
1303 card->name, vpi, vci);
1304 atomic_inc(&vcc->stats->rx_drop);
1305 goto drop;
1306 }
1307
1308 if ((sb = dev_alloc_skb(64)) == NULL) {
1309 printk("%s: Can't allocate buffers for AAL0.\n",
1310 card->name);
1311 atomic_inc(&vcc->stats->rx_err);
1312 goto drop;
1313 }
1314
1315 if (!atm_charge(vcc, sb->truesize)) {
1316 RXPRINTK("%s: atm_charge() dropped AAL0 packets.\n",
1317 card->name);
1318 dev_kfree_skb(sb);
1319 goto drop;
1320 }
1321
1322 *((u32 *) sb->data) = header;
1323 skb_put(sb, sizeof(u32));
1324 skb_put_data(sb, &(queue->data[16]), ATM_CELL_PAYLOAD);
1325
1326 ATM_SKB(sb)->vcc = vcc;
1327 __net_timestamp(sb);
1328 vcc->push(vcc, sb);
1329 atomic_inc(&vcc->stats->rx);
1330
1331 drop:
1332 skb_pull(queue, 64);
1333
1334 head = IDT77252_PRV_PADDR(queue)
1335 + (queue->data - queue->head - 16);
1336
1337 if (queue->len < 128) {
1338 struct sk_buff *next;
1339 u32 handle;
1340
1341 head = le32_to_cpu(*(u32 *) &queue->data[0]);
1342 handle = le32_to_cpu(*(u32 *) &queue->data[4]);
1343
1344 next = sb_pool_skb(card, handle);
1345 recycle_rx_skb(card, queue);
1346
1347 if (next) {
1348 card->raw_cell_head = next;
1349 queue = card->raw_cell_head;
1350 dma_sync_single_for_cpu(&card->pcidev->dev,
1351 IDT77252_PRV_PADDR(queue),
1352 (skb_end_pointer(queue) -
1353 queue->data),
1354 DMA_FROM_DEVICE);
1355 } else {
1356 card->raw_cell_head = NULL;
1357 printk("%s: raw cell queue overrun\n",
1358 card->name);
1359 break;
1360 }
1361 }
1362 }
1363 }
1364
1365
1366 /*****************************************************************************/
1367 /* */
1368 /* TSQ Handling */
1369 /* */
1370 /*****************************************************************************/
1371
1372 static int
init_tsq(struct idt77252_dev * card)1373 init_tsq(struct idt77252_dev *card)
1374 {
1375 struct tsq_entry *tsqe;
1376
1377 card->tsq.base = dma_alloc_coherent(&card->pcidev->dev, RSQSIZE,
1378 &card->tsq.paddr, GFP_KERNEL);
1379 if (card->tsq.base == NULL) {
1380 printk("%s: can't allocate TSQ.\n", card->name);
1381 return -1;
1382 }
1383
1384 card->tsq.last = card->tsq.base + TSQ_NUM_ENTRIES - 1;
1385 card->tsq.next = card->tsq.last;
1386 for (tsqe = card->tsq.base; tsqe <= card->tsq.last; tsqe++)
1387 tsqe->word_2 = cpu_to_le32(SAR_TSQE_INVALID);
1388
1389 writel(card->tsq.paddr, SAR_REG_TSQB);
1390 writel((unsigned long) card->tsq.next - (unsigned long) card->tsq.base,
1391 SAR_REG_TSQH);
1392
1393 return 0;
1394 }
1395
1396 static void
deinit_tsq(struct idt77252_dev * card)1397 deinit_tsq(struct idt77252_dev *card)
1398 {
1399 dma_free_coherent(&card->pcidev->dev, TSQSIZE,
1400 card->tsq.base, card->tsq.paddr);
1401 }
1402
1403 static void
idt77252_tx(struct idt77252_dev * card)1404 idt77252_tx(struct idt77252_dev *card)
1405 {
1406 struct tsq_entry *tsqe;
1407 unsigned int vpi, vci;
1408 struct vc_map *vc;
1409 u32 conn, stat;
1410
1411 if (card->tsq.next == card->tsq.last)
1412 tsqe = card->tsq.base;
1413 else
1414 tsqe = card->tsq.next + 1;
1415
1416 TXPRINTK("idt77252_tx: tsq %p: base %p, next %p, last %p\n", tsqe,
1417 card->tsq.base, card->tsq.next, card->tsq.last);
1418 TXPRINTK("idt77252_tx: tsqb %08x, tsqt %08x, tsqh %08x, \n",
1419 readl(SAR_REG_TSQB),
1420 readl(SAR_REG_TSQT),
1421 readl(SAR_REG_TSQH));
1422
1423 stat = le32_to_cpu(tsqe->word_2);
1424
1425 if (stat & SAR_TSQE_INVALID)
1426 return;
1427
1428 do {
1429 TXPRINTK("tsqe: 0x%p [0x%08x 0x%08x]\n", tsqe,
1430 le32_to_cpu(tsqe->word_1),
1431 le32_to_cpu(tsqe->word_2));
1432
1433 switch (stat & SAR_TSQE_TYPE) {
1434 case SAR_TSQE_TYPE_TIMER:
1435 TXPRINTK("%s: Timer RollOver detected.\n", card->name);
1436 break;
1437
1438 case SAR_TSQE_TYPE_IDLE:
1439
1440 conn = le32_to_cpu(tsqe->word_1);
1441
1442 if (SAR_TSQE_TAG(stat) == 0x10) {
1443 #ifdef NOTDEF
1444 printk("%s: Connection %d halted.\n",
1445 card->name,
1446 le32_to_cpu(tsqe->word_1) & 0x1fff);
1447 #endif
1448 break;
1449 }
1450
1451 vc = card->vcs[conn & 0x1fff];
1452 if (!vc) {
1453 printk("%s: could not find VC from conn %d\n",
1454 card->name, conn & 0x1fff);
1455 break;
1456 }
1457
1458 printk("%s: Connection %d IDLE.\n",
1459 card->name, vc->index);
1460
1461 set_bit(VCF_IDLE, &vc->flags);
1462 break;
1463
1464 case SAR_TSQE_TYPE_TSR:
1465
1466 conn = le32_to_cpu(tsqe->word_1);
1467
1468 vc = card->vcs[conn & 0x1fff];
1469 if (!vc) {
1470 printk("%s: no VC at index %d\n",
1471 card->name,
1472 le32_to_cpu(tsqe->word_1) & 0x1fff);
1473 break;
1474 }
1475
1476 drain_scq(card, vc);
1477 break;
1478
1479 case SAR_TSQE_TYPE_TBD_COMP:
1480
1481 conn = le32_to_cpu(tsqe->word_1);
1482
1483 vpi = (conn >> SAR_TBD_VPI_SHIFT) & 0x00ff;
1484 vci = (conn >> SAR_TBD_VCI_SHIFT) & 0xffff;
1485
1486 if (vpi >= (1 << card->vpibits) ||
1487 vci >= (1 << card->vcibits)) {
1488 printk("%s: TBD complete: "
1489 "out of range VPI.VCI %u.%u\n",
1490 card->name, vpi, vci);
1491 break;
1492 }
1493
1494 vc = card->vcs[VPCI2VC(card, vpi, vci)];
1495 if (!vc) {
1496 printk("%s: TBD complete: "
1497 "no VC at VPI.VCI %u.%u\n",
1498 card->name, vpi, vci);
1499 break;
1500 }
1501
1502 drain_scq(card, vc);
1503 break;
1504 }
1505
1506 tsqe->word_2 = cpu_to_le32(SAR_TSQE_INVALID);
1507
1508 card->tsq.next = tsqe;
1509 if (card->tsq.next == card->tsq.last)
1510 tsqe = card->tsq.base;
1511 else
1512 tsqe = card->tsq.next + 1;
1513
1514 TXPRINTK("tsqe: %p: base %p, next %p, last %p\n", tsqe,
1515 card->tsq.base, card->tsq.next, card->tsq.last);
1516
1517 stat = le32_to_cpu(tsqe->word_2);
1518
1519 } while (!(stat & SAR_TSQE_INVALID));
1520
1521 writel((unsigned long)card->tsq.next - (unsigned long)card->tsq.base,
1522 SAR_REG_TSQH);
1523
1524 XPRINTK("idt77252_tx-after writel%d: TSQ head = 0x%x, tail = 0x%x, next = 0x%p.\n",
1525 card->index, readl(SAR_REG_TSQH),
1526 readl(SAR_REG_TSQT), card->tsq.next);
1527 }
1528
1529
1530 static void
tst_timer(struct timer_list * t)1531 tst_timer(struct timer_list *t)
1532 {
1533 struct idt77252_dev *card = from_timer(card, t, tst_timer);
1534 unsigned long base, idle, jump;
1535 unsigned long flags;
1536 u32 pc;
1537 int e;
1538
1539 spin_lock_irqsave(&card->tst_lock, flags);
1540
1541 base = card->tst[card->tst_index];
1542 idle = card->tst[card->tst_index ^ 1];
1543
1544 if (test_bit(TST_SWITCH_WAIT, &card->tst_state)) {
1545 jump = base + card->tst_size - 2;
1546
1547 pc = readl(SAR_REG_NOW) >> 2;
1548 if ((pc ^ idle) & ~(card->tst_size - 1)) {
1549 mod_timer(&card->tst_timer, jiffies + 1);
1550 goto out;
1551 }
1552
1553 clear_bit(TST_SWITCH_WAIT, &card->tst_state);
1554
1555 card->tst_index ^= 1;
1556 write_sram(card, jump, TSTE_OPC_JMP | (base << 2));
1557
1558 base = card->tst[card->tst_index];
1559 idle = card->tst[card->tst_index ^ 1];
1560
1561 for (e = 0; e < card->tst_size - 2; e++) {
1562 if (card->soft_tst[e].tste & TSTE_PUSH_IDLE) {
1563 write_sram(card, idle + e,
1564 card->soft_tst[e].tste & TSTE_MASK);
1565 card->soft_tst[e].tste &= ~(TSTE_PUSH_IDLE);
1566 }
1567 }
1568 }
1569
1570 if (test_and_clear_bit(TST_SWITCH_PENDING, &card->tst_state)) {
1571
1572 for (e = 0; e < card->tst_size - 2; e++) {
1573 if (card->soft_tst[e].tste & TSTE_PUSH_ACTIVE) {
1574 write_sram(card, idle + e,
1575 card->soft_tst[e].tste & TSTE_MASK);
1576 card->soft_tst[e].tste &= ~(TSTE_PUSH_ACTIVE);
1577 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1578 }
1579 }
1580
1581 jump = base + card->tst_size - 2;
1582
1583 write_sram(card, jump, TSTE_OPC_NULL);
1584 set_bit(TST_SWITCH_WAIT, &card->tst_state);
1585
1586 mod_timer(&card->tst_timer, jiffies + 1);
1587 }
1588
1589 out:
1590 spin_unlock_irqrestore(&card->tst_lock, flags);
1591 }
1592
1593 static int
__fill_tst(struct idt77252_dev * card,struct vc_map * vc,int n,unsigned int opc)1594 __fill_tst(struct idt77252_dev *card, struct vc_map *vc,
1595 int n, unsigned int opc)
1596 {
1597 unsigned long cl, avail;
1598 unsigned long idle;
1599 int e, r;
1600 u32 data;
1601
1602 avail = card->tst_size - 2;
1603 for (e = 0; e < avail; e++) {
1604 if (card->soft_tst[e].vc == NULL)
1605 break;
1606 }
1607 if (e >= avail) {
1608 printk("%s: No free TST entries found\n", card->name);
1609 return -1;
1610 }
1611
1612 NPRINTK("%s: conn %d: first TST entry at %d.\n",
1613 card->name, vc ? vc->index : -1, e);
1614
1615 r = n;
1616 cl = avail;
1617 data = opc & TSTE_OPC_MASK;
1618 if (vc && (opc != TSTE_OPC_NULL))
1619 data = opc | vc->index;
1620
1621 idle = card->tst[card->tst_index ^ 1];
1622
1623 /*
1624 * Fill Soft TST.
1625 */
1626 while (r > 0) {
1627 if ((cl >= avail) && (card->soft_tst[e].vc == NULL)) {
1628 if (vc)
1629 card->soft_tst[e].vc = vc;
1630 else
1631 card->soft_tst[e].vc = (void *)-1;
1632
1633 card->soft_tst[e].tste = data;
1634 if (timer_pending(&card->tst_timer))
1635 card->soft_tst[e].tste |= TSTE_PUSH_ACTIVE;
1636 else {
1637 write_sram(card, idle + e, data);
1638 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1639 }
1640
1641 cl -= card->tst_size;
1642 r--;
1643 }
1644
1645 if (++e == avail)
1646 e = 0;
1647 cl += n;
1648 }
1649
1650 return 0;
1651 }
1652
1653 static int
fill_tst(struct idt77252_dev * card,struct vc_map * vc,int n,unsigned int opc)1654 fill_tst(struct idt77252_dev *card, struct vc_map *vc, int n, unsigned int opc)
1655 {
1656 unsigned long flags;
1657 int res;
1658
1659 spin_lock_irqsave(&card->tst_lock, flags);
1660
1661 res = __fill_tst(card, vc, n, opc);
1662
1663 set_bit(TST_SWITCH_PENDING, &card->tst_state);
1664 if (!timer_pending(&card->tst_timer))
1665 mod_timer(&card->tst_timer, jiffies + 1);
1666
1667 spin_unlock_irqrestore(&card->tst_lock, flags);
1668 return res;
1669 }
1670
1671 static int
__clear_tst(struct idt77252_dev * card,struct vc_map * vc)1672 __clear_tst(struct idt77252_dev *card, struct vc_map *vc)
1673 {
1674 unsigned long idle;
1675 int e;
1676
1677 idle = card->tst[card->tst_index ^ 1];
1678
1679 for (e = 0; e < card->tst_size - 2; e++) {
1680 if (card->soft_tst[e].vc == vc) {
1681 card->soft_tst[e].vc = NULL;
1682
1683 card->soft_tst[e].tste = TSTE_OPC_VAR;
1684 if (timer_pending(&card->tst_timer))
1685 card->soft_tst[e].tste |= TSTE_PUSH_ACTIVE;
1686 else {
1687 write_sram(card, idle + e, TSTE_OPC_VAR);
1688 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1689 }
1690 }
1691 }
1692
1693 return 0;
1694 }
1695
1696 static int
clear_tst(struct idt77252_dev * card,struct vc_map * vc)1697 clear_tst(struct idt77252_dev *card, struct vc_map *vc)
1698 {
1699 unsigned long flags;
1700 int res;
1701
1702 spin_lock_irqsave(&card->tst_lock, flags);
1703
1704 res = __clear_tst(card, vc);
1705
1706 set_bit(TST_SWITCH_PENDING, &card->tst_state);
1707 if (!timer_pending(&card->tst_timer))
1708 mod_timer(&card->tst_timer, jiffies + 1);
1709
1710 spin_unlock_irqrestore(&card->tst_lock, flags);
1711 return res;
1712 }
1713
1714 static int
change_tst(struct idt77252_dev * card,struct vc_map * vc,int n,unsigned int opc)1715 change_tst(struct idt77252_dev *card, struct vc_map *vc,
1716 int n, unsigned int opc)
1717 {
1718 unsigned long flags;
1719 int res;
1720
1721 spin_lock_irqsave(&card->tst_lock, flags);
1722
1723 __clear_tst(card, vc);
1724 res = __fill_tst(card, vc, n, opc);
1725
1726 set_bit(TST_SWITCH_PENDING, &card->tst_state);
1727 if (!timer_pending(&card->tst_timer))
1728 mod_timer(&card->tst_timer, jiffies + 1);
1729
1730 spin_unlock_irqrestore(&card->tst_lock, flags);
1731 return res;
1732 }
1733
1734
1735 static int
set_tct(struct idt77252_dev * card,struct vc_map * vc)1736 set_tct(struct idt77252_dev *card, struct vc_map *vc)
1737 {
1738 unsigned long tct;
1739
1740 tct = (unsigned long) (card->tct_base + vc->index * SAR_SRAM_TCT_SIZE);
1741
1742 switch (vc->class) {
1743 case SCHED_CBR:
1744 OPRINTK("%s: writing TCT at 0x%lx, SCD 0x%lx.\n",
1745 card->name, tct, vc->scq->scd);
1746
1747 write_sram(card, tct + 0, TCT_CBR | vc->scq->scd);
1748 write_sram(card, tct + 1, 0);
1749 write_sram(card, tct + 2, 0);
1750 write_sram(card, tct + 3, 0);
1751 write_sram(card, tct + 4, 0);
1752 write_sram(card, tct + 5, 0);
1753 write_sram(card, tct + 6, 0);
1754 write_sram(card, tct + 7, 0);
1755 break;
1756
1757 case SCHED_UBR:
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_UBR | vc->scq->scd);
1762 write_sram(card, tct + 1, 0);
1763 write_sram(card, tct + 2, TCT_TSIF);
1764 write_sram(card, tct + 3, TCT_HALT | TCT_IDLE);
1765 write_sram(card, tct + 4, 0);
1766 write_sram(card, tct + 5, vc->init_er);
1767 write_sram(card, tct + 6, 0);
1768 write_sram(card, tct + 7, TCT_FLAG_UBR);
1769 break;
1770
1771 case SCHED_VBR:
1772 case SCHED_ABR:
1773 default:
1774 return -ENOSYS;
1775 }
1776
1777 return 0;
1778 }
1779
1780 /*****************************************************************************/
1781 /* */
1782 /* FBQ Handling */
1783 /* */
1784 /*****************************************************************************/
1785
1786 static __inline__ int
idt77252_fbq_level(struct idt77252_dev * card,int queue)1787 idt77252_fbq_level(struct idt77252_dev *card, int queue)
1788 {
1789 return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) & 0x0f;
1790 }
1791
1792 static __inline__ int
idt77252_fbq_full(struct idt77252_dev * card,int queue)1793 idt77252_fbq_full(struct idt77252_dev *card, int queue)
1794 {
1795 return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) == 0x0f;
1796 }
1797
1798 static int
push_rx_skb(struct idt77252_dev * card,struct sk_buff * skb,int queue)1799 push_rx_skb(struct idt77252_dev *card, struct sk_buff *skb, int queue)
1800 {
1801 unsigned long flags;
1802 u32 handle;
1803 u32 addr;
1804
1805 skb->data = skb->head;
1806 skb_reset_tail_pointer(skb);
1807 skb->len = 0;
1808
1809 skb_reserve(skb, 16);
1810
1811 switch (queue) {
1812 case 0:
1813 skb_put(skb, SAR_FB_SIZE_0);
1814 break;
1815 case 1:
1816 skb_put(skb, SAR_FB_SIZE_1);
1817 break;
1818 case 2:
1819 skb_put(skb, SAR_FB_SIZE_2);
1820 break;
1821 case 3:
1822 skb_put(skb, SAR_FB_SIZE_3);
1823 break;
1824 default:
1825 return -1;
1826 }
1827
1828 if (idt77252_fbq_full(card, queue))
1829 return -1;
1830
1831 memset(&skb->data[(skb->len & ~(0x3f)) - 64], 0, 2 * sizeof(u32));
1832
1833 handle = IDT77252_PRV_POOL(skb);
1834 addr = IDT77252_PRV_PADDR(skb);
1835
1836 spin_lock_irqsave(&card->cmd_lock, flags);
1837 writel(handle, card->fbq[queue]);
1838 writel(addr, card->fbq[queue]);
1839 spin_unlock_irqrestore(&card->cmd_lock, flags);
1840
1841 return 0;
1842 }
1843
1844 static void
add_rx_skb(struct idt77252_dev * card,int queue,unsigned int size,unsigned int count)1845 add_rx_skb(struct idt77252_dev *card, int queue,
1846 unsigned int size, unsigned int count)
1847 {
1848 struct sk_buff *skb;
1849 dma_addr_t paddr;
1850 u32 handle;
1851
1852 while (count--) {
1853 skb = dev_alloc_skb(size);
1854 if (!skb)
1855 return;
1856
1857 if (sb_pool_add(card, skb, queue)) {
1858 printk("%s: SB POOL full\n", __func__);
1859 goto outfree;
1860 }
1861
1862 paddr = dma_map_single(&card->pcidev->dev, skb->data,
1863 skb_end_pointer(skb) - skb->data,
1864 DMA_FROM_DEVICE);
1865 IDT77252_PRV_PADDR(skb) = paddr;
1866
1867 if (push_rx_skb(card, skb, queue)) {
1868 printk("%s: FB QUEUE full\n", __func__);
1869 goto outunmap;
1870 }
1871 }
1872
1873 return;
1874
1875 outunmap:
1876 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
1877 skb_end_pointer(skb) - skb->data, DMA_FROM_DEVICE);
1878
1879 handle = IDT77252_PRV_POOL(skb);
1880 card->sbpool[POOL_QUEUE(handle)].skb[POOL_INDEX(handle)] = NULL;
1881
1882 outfree:
1883 dev_kfree_skb(skb);
1884 }
1885
1886
1887 static void
recycle_rx_skb(struct idt77252_dev * card,struct sk_buff * skb)1888 recycle_rx_skb(struct idt77252_dev *card, struct sk_buff *skb)
1889 {
1890 u32 handle = IDT77252_PRV_POOL(skb);
1891 int err;
1892
1893 dma_sync_single_for_device(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
1894 skb_end_pointer(skb) - skb->data,
1895 DMA_FROM_DEVICE);
1896
1897 err = push_rx_skb(card, skb, POOL_QUEUE(handle));
1898 if (err) {
1899 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb),
1900 skb_end_pointer(skb) - skb->data,
1901 DMA_FROM_DEVICE);
1902 sb_pool_remove(card, skb);
1903 dev_kfree_skb(skb);
1904 }
1905 }
1906
1907 static void
flush_rx_pool(struct idt77252_dev * card,struct rx_pool * rpp)1908 flush_rx_pool(struct idt77252_dev *card, struct rx_pool *rpp)
1909 {
1910 skb_queue_head_init(&rpp->queue);
1911 rpp->len = 0;
1912 }
1913
1914 static void
recycle_rx_pool_skb(struct idt77252_dev * card,struct rx_pool * rpp)1915 recycle_rx_pool_skb(struct idt77252_dev *card, struct rx_pool *rpp)
1916 {
1917 struct sk_buff *skb, *tmp;
1918
1919 skb_queue_walk_safe(&rpp->queue, skb, tmp)
1920 recycle_rx_skb(card, skb);
1921
1922 flush_rx_pool(card, rpp);
1923 }
1924
1925 /*****************************************************************************/
1926 /* */
1927 /* ATM Interface */
1928 /* */
1929 /*****************************************************************************/
1930
1931 static void
idt77252_phy_put(struct atm_dev * dev,unsigned char value,unsigned long addr)1932 idt77252_phy_put(struct atm_dev *dev, unsigned char value, unsigned long addr)
1933 {
1934 write_utility(dev->dev_data, 0x100 + (addr & 0x1ff), value);
1935 }
1936
1937 static unsigned char
idt77252_phy_get(struct atm_dev * dev,unsigned long addr)1938 idt77252_phy_get(struct atm_dev *dev, unsigned long addr)
1939 {
1940 return read_utility(dev->dev_data, 0x100 + (addr & 0x1ff));
1941 }
1942
1943 static inline int
idt77252_send_skb(struct atm_vcc * vcc,struct sk_buff * skb,int oam)1944 idt77252_send_skb(struct atm_vcc *vcc, struct sk_buff *skb, int oam)
1945 {
1946 struct atm_dev *dev = vcc->dev;
1947 struct idt77252_dev *card = dev->dev_data;
1948 struct vc_map *vc = vcc->dev_data;
1949 int err;
1950
1951 if (vc == NULL) {
1952 printk("%s: NULL connection in send().\n", card->name);
1953 atomic_inc(&vcc->stats->tx_err);
1954 dev_kfree_skb(skb);
1955 return -EINVAL;
1956 }
1957 if (!test_bit(VCF_TX, &vc->flags)) {
1958 printk("%s: Trying to transmit on a non-tx VC.\n", card->name);
1959 atomic_inc(&vcc->stats->tx_err);
1960 dev_kfree_skb(skb);
1961 return -EINVAL;
1962 }
1963
1964 switch (vcc->qos.aal) {
1965 case ATM_AAL0:
1966 case ATM_AAL1:
1967 case ATM_AAL5:
1968 break;
1969 default:
1970 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal);
1971 atomic_inc(&vcc->stats->tx_err);
1972 dev_kfree_skb(skb);
1973 return -EINVAL;
1974 }
1975
1976 if (skb_shinfo(skb)->nr_frags != 0) {
1977 printk("%s: No scatter-gather yet.\n", card->name);
1978 atomic_inc(&vcc->stats->tx_err);
1979 dev_kfree_skb(skb);
1980 return -EINVAL;
1981 }
1982 ATM_SKB(skb)->vcc = vcc;
1983
1984 err = queue_skb(card, vc, skb, oam);
1985 if (err) {
1986 atomic_inc(&vcc->stats->tx_err);
1987 dev_kfree_skb(skb);
1988 return err;
1989 }
1990
1991 return 0;
1992 }
1993
idt77252_send(struct atm_vcc * vcc,struct sk_buff * skb)1994 static int idt77252_send(struct atm_vcc *vcc, struct sk_buff *skb)
1995 {
1996 return idt77252_send_skb(vcc, skb, 0);
1997 }
1998
1999 static int
idt77252_send_oam(struct atm_vcc * vcc,void * cell,int flags)2000 idt77252_send_oam(struct atm_vcc *vcc, void *cell, int flags)
2001 {
2002 struct atm_dev *dev = vcc->dev;
2003 struct idt77252_dev *card = dev->dev_data;
2004 struct sk_buff *skb;
2005
2006 skb = dev_alloc_skb(64);
2007 if (!skb) {
2008 printk("%s: Out of memory in send_oam().\n", card->name);
2009 atomic_inc(&vcc->stats->tx_err);
2010 return -ENOMEM;
2011 }
2012 refcount_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
2013
2014 skb_put_data(skb, cell, 52);
2015
2016 return idt77252_send_skb(vcc, skb, 1);
2017 }
2018
2019 static __inline__ unsigned int
idt77252_fls(unsigned int x)2020 idt77252_fls(unsigned int x)
2021 {
2022 int r = 1;
2023
2024 if (x == 0)
2025 return 0;
2026 if (x & 0xffff0000) {
2027 x >>= 16;
2028 r += 16;
2029 }
2030 if (x & 0xff00) {
2031 x >>= 8;
2032 r += 8;
2033 }
2034 if (x & 0xf0) {
2035 x >>= 4;
2036 r += 4;
2037 }
2038 if (x & 0xc) {
2039 x >>= 2;
2040 r += 2;
2041 }
2042 if (x & 0x2)
2043 r += 1;
2044 return r;
2045 }
2046
2047 static u16
idt77252_int_to_atmfp(unsigned int rate)2048 idt77252_int_to_atmfp(unsigned int rate)
2049 {
2050 u16 m, e;
2051
2052 if (rate == 0)
2053 return 0;
2054 e = idt77252_fls(rate) - 1;
2055 if (e < 9)
2056 m = (rate - (1 << e)) << (9 - e);
2057 else if (e == 9)
2058 m = (rate - (1 << e));
2059 else /* e > 9 */
2060 m = (rate - (1 << e)) >> (e - 9);
2061 return 0x4000 | (e << 9) | m;
2062 }
2063
2064 static u8
idt77252_rate_logindex(struct idt77252_dev * card,int pcr)2065 idt77252_rate_logindex(struct idt77252_dev *card, int pcr)
2066 {
2067 u16 afp;
2068
2069 afp = idt77252_int_to_atmfp(pcr < 0 ? -pcr : pcr);
2070 if (pcr < 0)
2071 return rate_to_log[(afp >> 5) & 0x1ff];
2072 return rate_to_log[((afp >> 5) + 1) & 0x1ff];
2073 }
2074
2075 static void
idt77252_est_timer(struct timer_list * t)2076 idt77252_est_timer(struct timer_list *t)
2077 {
2078 struct rate_estimator *est = from_timer(est, t, timer);
2079 struct vc_map *vc = est->vc;
2080 struct idt77252_dev *card = vc->card;
2081 unsigned long flags;
2082 u32 rate, cps;
2083 u64 ncells;
2084 u8 lacr;
2085
2086 spin_lock_irqsave(&vc->lock, flags);
2087 if (!vc->estimator)
2088 goto out;
2089 ncells = est->cells;
2090
2091 rate = ((u32)(ncells - est->last_cells)) << (7 - est->interval);
2092 est->last_cells = ncells;
2093 est->avcps += ((long)rate - (long)est->avcps) >> est->ewma_log;
2094 est->cps = (est->avcps + 0x1f) >> 5;
2095
2096 cps = est->cps;
2097 if (cps < (est->maxcps >> 4))
2098 cps = est->maxcps >> 4;
2099
2100 lacr = idt77252_rate_logindex(card, cps);
2101 if (lacr > vc->max_er)
2102 lacr = vc->max_er;
2103
2104 if (lacr != vc->lacr) {
2105 vc->lacr = lacr;
2106 writel(TCMDQ_LACR|(vc->lacr << 16)|vc->index, SAR_REG_TCMDQ);
2107 }
2108
2109 est->timer.expires = jiffies + ((HZ / 4) << est->interval);
2110 add_timer(&est->timer);
2111
2112 out:
2113 spin_unlock_irqrestore(&vc->lock, flags);
2114 }
2115
2116 static struct rate_estimator *
idt77252_init_est(struct vc_map * vc,int pcr)2117 idt77252_init_est(struct vc_map *vc, int pcr)
2118 {
2119 struct rate_estimator *est;
2120
2121 est = kzalloc(sizeof(struct rate_estimator), GFP_KERNEL);
2122 if (!est)
2123 return NULL;
2124 est->maxcps = pcr < 0 ? -pcr : pcr;
2125 est->cps = est->maxcps;
2126 est->avcps = est->cps << 5;
2127 est->vc = vc;
2128
2129 est->interval = 2; /* XXX: make this configurable */
2130 est->ewma_log = 2; /* XXX: make this configurable */
2131 timer_setup(&est->timer, idt77252_est_timer, 0);
2132 mod_timer(&est->timer, jiffies + ((HZ / 4) << est->interval));
2133
2134 return est;
2135 }
2136
2137 static int
idt77252_init_cbr(struct idt77252_dev * card,struct vc_map * vc,struct atm_vcc * vcc,struct atm_qos * qos)2138 idt77252_init_cbr(struct idt77252_dev *card, struct vc_map *vc,
2139 struct atm_vcc *vcc, struct atm_qos *qos)
2140 {
2141 int tst_free, tst_used, tst_entries;
2142 unsigned long tmpl, modl;
2143 int tcr, tcra;
2144
2145 if ((qos->txtp.max_pcr == 0) &&
2146 (qos->txtp.pcr == 0) && (qos->txtp.min_pcr == 0)) {
2147 printk("%s: trying to open a CBR VC with cell rate = 0\n",
2148 card->name);
2149 return -EINVAL;
2150 }
2151
2152 tst_used = 0;
2153 tst_free = card->tst_free;
2154 if (test_bit(VCF_TX, &vc->flags))
2155 tst_used = vc->ntste;
2156 tst_free += tst_used;
2157
2158 tcr = atm_pcr_goal(&qos->txtp);
2159 tcra = tcr >= 0 ? tcr : -tcr;
2160
2161 TXPRINTK("%s: CBR target cell rate = %d\n", card->name, tcra);
2162
2163 tmpl = (unsigned long) tcra * ((unsigned long) card->tst_size - 2);
2164 modl = tmpl % (unsigned long)card->utopia_pcr;
2165
2166 tst_entries = (int) (tmpl / card->utopia_pcr);
2167 if (tcr > 0) {
2168 if (modl > 0)
2169 tst_entries++;
2170 } else if (tcr == 0) {
2171 tst_entries = tst_free - SAR_TST_RESERVED;
2172 if (tst_entries <= 0) {
2173 printk("%s: no CBR bandwidth free.\n", card->name);
2174 return -ENOSR;
2175 }
2176 }
2177
2178 if (tst_entries == 0) {
2179 printk("%s: selected CBR bandwidth < granularity.\n",
2180 card->name);
2181 return -EINVAL;
2182 }
2183
2184 if (tst_entries > (tst_free - SAR_TST_RESERVED)) {
2185 printk("%s: not enough CBR bandwidth free.\n", card->name);
2186 return -ENOSR;
2187 }
2188
2189 vc->ntste = tst_entries;
2190
2191 card->tst_free = tst_free - tst_entries;
2192 if (test_bit(VCF_TX, &vc->flags)) {
2193 if (tst_used == tst_entries)
2194 return 0;
2195
2196 OPRINTK("%s: modify %d -> %d entries in TST.\n",
2197 card->name, tst_used, tst_entries);
2198 change_tst(card, vc, tst_entries, TSTE_OPC_CBR);
2199 return 0;
2200 }
2201
2202 OPRINTK("%s: setting %d entries in TST.\n", card->name, tst_entries);
2203 fill_tst(card, vc, tst_entries, TSTE_OPC_CBR);
2204 return 0;
2205 }
2206
2207 static int
idt77252_init_ubr(struct idt77252_dev * card,struct vc_map * vc,struct atm_vcc * vcc,struct atm_qos * qos)2208 idt77252_init_ubr(struct idt77252_dev *card, struct vc_map *vc,
2209 struct atm_vcc *vcc, struct atm_qos *qos)
2210 {
2211 struct rate_estimator *est = NULL;
2212 unsigned long flags;
2213 int tcr;
2214
2215 spin_lock_irqsave(&vc->lock, flags);
2216 if (vc->estimator) {
2217 est = vc->estimator;
2218 vc->estimator = NULL;
2219 }
2220 spin_unlock_irqrestore(&vc->lock, flags);
2221 if (est) {
2222 del_timer_sync(&est->timer);
2223 kfree(est);
2224 }
2225
2226 tcr = atm_pcr_goal(&qos->txtp);
2227 if (tcr == 0)
2228 tcr = card->link_pcr;
2229
2230 vc->estimator = idt77252_init_est(vc, tcr);
2231
2232 vc->class = SCHED_UBR;
2233 vc->init_er = idt77252_rate_logindex(card, tcr);
2234 vc->lacr = vc->init_er;
2235 if (tcr < 0)
2236 vc->max_er = vc->init_er;
2237 else
2238 vc->max_er = 0xff;
2239
2240 return 0;
2241 }
2242
2243 static int
idt77252_init_tx(struct idt77252_dev * card,struct vc_map * vc,struct atm_vcc * vcc,struct atm_qos * qos)2244 idt77252_init_tx(struct idt77252_dev *card, struct vc_map *vc,
2245 struct atm_vcc *vcc, struct atm_qos *qos)
2246 {
2247 int error;
2248
2249 if (test_bit(VCF_TX, &vc->flags))
2250 return -EBUSY;
2251
2252 switch (qos->txtp.traffic_class) {
2253 case ATM_CBR:
2254 vc->class = SCHED_CBR;
2255 break;
2256
2257 case ATM_UBR:
2258 vc->class = SCHED_UBR;
2259 break;
2260
2261 case ATM_VBR:
2262 case ATM_ABR:
2263 default:
2264 return -EPROTONOSUPPORT;
2265 }
2266
2267 vc->scq = alloc_scq(card, vc->class);
2268 if (!vc->scq) {
2269 printk("%s: can't get SCQ.\n", card->name);
2270 return -ENOMEM;
2271 }
2272
2273 vc->scq->scd = get_free_scd(card, vc);
2274 if (vc->scq->scd == 0) {
2275 printk("%s: no SCD available.\n", card->name);
2276 free_scq(card, vc->scq);
2277 return -ENOMEM;
2278 }
2279
2280 fill_scd(card, vc->scq, vc->class);
2281
2282 if (set_tct(card, vc)) {
2283 printk("%s: class %d not supported.\n",
2284 card->name, qos->txtp.traffic_class);
2285
2286 card->scd2vc[vc->scd_index] = NULL;
2287 free_scq(card, vc->scq);
2288 return -EPROTONOSUPPORT;
2289 }
2290
2291 switch (vc->class) {
2292 case SCHED_CBR:
2293 error = idt77252_init_cbr(card, vc, vcc, qos);
2294 if (error) {
2295 card->scd2vc[vc->scd_index] = NULL;
2296 free_scq(card, vc->scq);
2297 return error;
2298 }
2299
2300 clear_bit(VCF_IDLE, &vc->flags);
2301 writel(TCMDQ_START | vc->index, SAR_REG_TCMDQ);
2302 break;
2303
2304 case SCHED_UBR:
2305 error = idt77252_init_ubr(card, vc, vcc, qos);
2306 if (error) {
2307 card->scd2vc[vc->scd_index] = NULL;
2308 free_scq(card, vc->scq);
2309 return error;
2310 }
2311
2312 set_bit(VCF_IDLE, &vc->flags);
2313 break;
2314 }
2315
2316 vc->tx_vcc = vcc;
2317 set_bit(VCF_TX, &vc->flags);
2318 return 0;
2319 }
2320
2321 static int
idt77252_init_rx(struct idt77252_dev * card,struct vc_map * vc,struct atm_vcc * vcc,struct atm_qos * qos)2322 idt77252_init_rx(struct idt77252_dev *card, struct vc_map *vc,
2323 struct atm_vcc *vcc, struct atm_qos *qos)
2324 {
2325 unsigned long flags;
2326 unsigned long addr;
2327 u32 rcte = 0;
2328
2329 if (test_bit(VCF_RX, &vc->flags))
2330 return -EBUSY;
2331
2332 vc->rx_vcc = vcc;
2333 set_bit(VCF_RX, &vc->flags);
2334
2335 if ((vcc->vci == 3) || (vcc->vci == 4))
2336 return 0;
2337
2338 flush_rx_pool(card, &vc->rcv.rx_pool);
2339
2340 rcte |= SAR_RCTE_CONNECTOPEN;
2341 rcte |= SAR_RCTE_RAWCELLINTEN;
2342
2343 switch (qos->aal) {
2344 case ATM_AAL0:
2345 rcte |= SAR_RCTE_RCQ;
2346 break;
2347 case ATM_AAL1:
2348 rcte |= SAR_RCTE_OAM; /* Let SAR drop Video */
2349 break;
2350 case ATM_AAL34:
2351 rcte |= SAR_RCTE_AAL34;
2352 break;
2353 case ATM_AAL5:
2354 rcte |= SAR_RCTE_AAL5;
2355 break;
2356 default:
2357 rcte |= SAR_RCTE_RCQ;
2358 break;
2359 }
2360
2361 if (qos->aal != ATM_AAL5)
2362 rcte |= SAR_RCTE_FBP_1;
2363 else if (qos->rxtp.max_sdu > SAR_FB_SIZE_2)
2364 rcte |= SAR_RCTE_FBP_3;
2365 else if (qos->rxtp.max_sdu > SAR_FB_SIZE_1)
2366 rcte |= SAR_RCTE_FBP_2;
2367 else if (qos->rxtp.max_sdu > SAR_FB_SIZE_0)
2368 rcte |= SAR_RCTE_FBP_1;
2369 else
2370 rcte |= SAR_RCTE_FBP_01;
2371
2372 addr = card->rct_base + (vc->index << 2);
2373
2374 OPRINTK("%s: writing RCT at 0x%lx\n", card->name, addr);
2375 write_sram(card, addr, rcte);
2376
2377 spin_lock_irqsave(&card->cmd_lock, flags);
2378 writel(SAR_CMD_OPEN_CONNECTION | (addr << 2), SAR_REG_CMD);
2379 waitfor_idle(card);
2380 spin_unlock_irqrestore(&card->cmd_lock, flags);
2381
2382 return 0;
2383 }
2384
2385 static int
idt77252_open(struct atm_vcc * vcc)2386 idt77252_open(struct atm_vcc *vcc)
2387 {
2388 struct atm_dev *dev = vcc->dev;
2389 struct idt77252_dev *card = dev->dev_data;
2390 struct vc_map *vc;
2391 unsigned int index;
2392 unsigned int inuse;
2393 int error;
2394 int vci = vcc->vci;
2395 short vpi = vcc->vpi;
2396
2397 if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC)
2398 return 0;
2399
2400 if (vpi >= (1 << card->vpibits)) {
2401 printk("%s: unsupported VPI: %d\n", card->name, vpi);
2402 return -EINVAL;
2403 }
2404
2405 if (vci >= (1 << card->vcibits)) {
2406 printk("%s: unsupported VCI: %d\n", card->name, vci);
2407 return -EINVAL;
2408 }
2409
2410 set_bit(ATM_VF_ADDR, &vcc->flags);
2411
2412 mutex_lock(&card->mutex);
2413
2414 OPRINTK("%s: opening vpi.vci: %d.%d\n", card->name, vpi, vci);
2415
2416 switch (vcc->qos.aal) {
2417 case ATM_AAL0:
2418 case ATM_AAL1:
2419 case ATM_AAL5:
2420 break;
2421 default:
2422 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal);
2423 mutex_unlock(&card->mutex);
2424 return -EPROTONOSUPPORT;
2425 }
2426
2427 index = VPCI2VC(card, vpi, vci);
2428 if (!card->vcs[index]) {
2429 card->vcs[index] = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2430 if (!card->vcs[index]) {
2431 printk("%s: can't alloc vc in open()\n", card->name);
2432 mutex_unlock(&card->mutex);
2433 return -ENOMEM;
2434 }
2435 card->vcs[index]->card = card;
2436 card->vcs[index]->index = index;
2437
2438 spin_lock_init(&card->vcs[index]->lock);
2439 }
2440 vc = card->vcs[index];
2441
2442 vcc->dev_data = vc;
2443
2444 IPRINTK("%s: idt77252_open: vc = %d (%d.%d) %s/%s (max RX SDU: %u)\n",
2445 card->name, vc->index, vcc->vpi, vcc->vci,
2446 vcc->qos.rxtp.traffic_class != ATM_NONE ? "rx" : "--",
2447 vcc->qos.txtp.traffic_class != ATM_NONE ? "tx" : "--",
2448 vcc->qos.rxtp.max_sdu);
2449
2450 inuse = 0;
2451 if (vcc->qos.txtp.traffic_class != ATM_NONE &&
2452 test_bit(VCF_TX, &vc->flags))
2453 inuse = 1;
2454 if (vcc->qos.rxtp.traffic_class != ATM_NONE &&
2455 test_bit(VCF_RX, &vc->flags))
2456 inuse += 2;
2457
2458 if (inuse) {
2459 printk("%s: %s vci already in use.\n", card->name,
2460 inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx");
2461 mutex_unlock(&card->mutex);
2462 return -EADDRINUSE;
2463 }
2464
2465 if (vcc->qos.txtp.traffic_class != ATM_NONE) {
2466 error = idt77252_init_tx(card, vc, vcc, &vcc->qos);
2467 if (error) {
2468 mutex_unlock(&card->mutex);
2469 return error;
2470 }
2471 }
2472
2473 if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
2474 error = idt77252_init_rx(card, vc, vcc, &vcc->qos);
2475 if (error) {
2476 mutex_unlock(&card->mutex);
2477 return error;
2478 }
2479 }
2480
2481 set_bit(ATM_VF_READY, &vcc->flags);
2482
2483 mutex_unlock(&card->mutex);
2484 return 0;
2485 }
2486
2487 static void
idt77252_close(struct atm_vcc * vcc)2488 idt77252_close(struct atm_vcc *vcc)
2489 {
2490 struct atm_dev *dev = vcc->dev;
2491 struct idt77252_dev *card = dev->dev_data;
2492 struct vc_map *vc = vcc->dev_data;
2493 unsigned long flags;
2494 unsigned long addr;
2495 unsigned long timeout;
2496
2497 mutex_lock(&card->mutex);
2498
2499 IPRINTK("%s: idt77252_close: vc = %d (%d.%d)\n",
2500 card->name, vc->index, vcc->vpi, vcc->vci);
2501
2502 clear_bit(ATM_VF_READY, &vcc->flags);
2503
2504 if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
2505
2506 spin_lock_irqsave(&vc->lock, flags);
2507 clear_bit(VCF_RX, &vc->flags);
2508 vc->rx_vcc = NULL;
2509 spin_unlock_irqrestore(&vc->lock, flags);
2510
2511 if ((vcc->vci == 3) || (vcc->vci == 4))
2512 goto done;
2513
2514 addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE;
2515
2516 spin_lock_irqsave(&card->cmd_lock, flags);
2517 writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2), SAR_REG_CMD);
2518 waitfor_idle(card);
2519 spin_unlock_irqrestore(&card->cmd_lock, flags);
2520
2521 if (skb_queue_len(&vc->rcv.rx_pool.queue) != 0) {
2522 DPRINTK("%s: closing a VC with pending rx buffers.\n",
2523 card->name);
2524
2525 recycle_rx_pool_skb(card, &vc->rcv.rx_pool);
2526 }
2527 }
2528
2529 done:
2530 if (vcc->qos.txtp.traffic_class != ATM_NONE) {
2531
2532 spin_lock_irqsave(&vc->lock, flags);
2533 clear_bit(VCF_TX, &vc->flags);
2534 clear_bit(VCF_IDLE, &vc->flags);
2535 clear_bit(VCF_RSV, &vc->flags);
2536 vc->tx_vcc = NULL;
2537
2538 if (vc->estimator) {
2539 del_timer(&vc->estimator->timer);
2540 kfree(vc->estimator);
2541 vc->estimator = NULL;
2542 }
2543 spin_unlock_irqrestore(&vc->lock, flags);
2544
2545 timeout = 5 * 1000;
2546 while (atomic_read(&vc->scq->used) > 0) {
2547 timeout = msleep_interruptible(timeout);
2548 if (!timeout) {
2549 pr_warn("%s: SCQ drain timeout: %u used\n",
2550 card->name, atomic_read(&vc->scq->used));
2551 break;
2552 }
2553 }
2554
2555 writel(TCMDQ_HALT | vc->index, SAR_REG_TCMDQ);
2556 clear_scd(card, vc->scq, vc->class);
2557
2558 if (vc->class == SCHED_CBR) {
2559 clear_tst(card, vc);
2560 card->tst_free += vc->ntste;
2561 vc->ntste = 0;
2562 }
2563
2564 card->scd2vc[vc->scd_index] = NULL;
2565 free_scq(card, vc->scq);
2566 }
2567
2568 mutex_unlock(&card->mutex);
2569 }
2570
2571 static int
idt77252_change_qos(struct atm_vcc * vcc,struct atm_qos * qos,int flags)2572 idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos, int flags)
2573 {
2574 struct atm_dev *dev = vcc->dev;
2575 struct idt77252_dev *card = dev->dev_data;
2576 struct vc_map *vc = vcc->dev_data;
2577 int error = 0;
2578
2579 mutex_lock(&card->mutex);
2580
2581 if (qos->txtp.traffic_class != ATM_NONE) {
2582 if (!test_bit(VCF_TX, &vc->flags)) {
2583 error = idt77252_init_tx(card, vc, vcc, qos);
2584 if (error)
2585 goto out;
2586 } else {
2587 switch (qos->txtp.traffic_class) {
2588 case ATM_CBR:
2589 error = idt77252_init_cbr(card, vc, vcc, qos);
2590 if (error)
2591 goto out;
2592 break;
2593
2594 case ATM_UBR:
2595 error = idt77252_init_ubr(card, vc, vcc, qos);
2596 if (error)
2597 goto out;
2598
2599 if (!test_bit(VCF_IDLE, &vc->flags)) {
2600 writel(TCMDQ_LACR | (vc->lacr << 16) |
2601 vc->index, SAR_REG_TCMDQ);
2602 }
2603 break;
2604
2605 case ATM_VBR:
2606 case ATM_ABR:
2607 error = -EOPNOTSUPP;
2608 goto out;
2609 }
2610 }
2611 }
2612
2613 if ((qos->rxtp.traffic_class != ATM_NONE) &&
2614 !test_bit(VCF_RX, &vc->flags)) {
2615 error = idt77252_init_rx(card, vc, vcc, qos);
2616 if (error)
2617 goto out;
2618 }
2619
2620 memcpy(&vcc->qos, qos, sizeof(struct atm_qos));
2621
2622 set_bit(ATM_VF_HASQOS, &vcc->flags);
2623
2624 out:
2625 mutex_unlock(&card->mutex);
2626 return error;
2627 }
2628
2629 static int
idt77252_proc_read(struct atm_dev * dev,loff_t * pos,char * page)2630 idt77252_proc_read(struct atm_dev *dev, loff_t * pos, char *page)
2631 {
2632 struct idt77252_dev *card = dev->dev_data;
2633 int i, left;
2634
2635 left = (int) *pos;
2636 if (!left--)
2637 return sprintf(page, "IDT77252 Interrupts:\n");
2638 if (!left--)
2639 return sprintf(page, "TSIF: %lu\n", card->irqstat[15]);
2640 if (!left--)
2641 return sprintf(page, "TXICP: %lu\n", card->irqstat[14]);
2642 if (!left--)
2643 return sprintf(page, "TSQF: %lu\n", card->irqstat[12]);
2644 if (!left--)
2645 return sprintf(page, "TMROF: %lu\n", card->irqstat[11]);
2646 if (!left--)
2647 return sprintf(page, "PHYI: %lu\n", card->irqstat[10]);
2648 if (!left--)
2649 return sprintf(page, "FBQ3A: %lu\n", card->irqstat[8]);
2650 if (!left--)
2651 return sprintf(page, "FBQ2A: %lu\n", card->irqstat[7]);
2652 if (!left--)
2653 return sprintf(page, "RSQF: %lu\n", card->irqstat[6]);
2654 if (!left--)
2655 return sprintf(page, "EPDU: %lu\n", card->irqstat[5]);
2656 if (!left--)
2657 return sprintf(page, "RAWCF: %lu\n", card->irqstat[4]);
2658 if (!left--)
2659 return sprintf(page, "FBQ1A: %lu\n", card->irqstat[3]);
2660 if (!left--)
2661 return sprintf(page, "FBQ0A: %lu\n", card->irqstat[2]);
2662 if (!left--)
2663 return sprintf(page, "RSQAF: %lu\n", card->irqstat[1]);
2664 if (!left--)
2665 return sprintf(page, "IDT77252 Transmit Connection Table:\n");
2666
2667 for (i = 0; i < card->tct_size; i++) {
2668 unsigned long tct;
2669 struct atm_vcc *vcc;
2670 struct vc_map *vc;
2671 char *p;
2672
2673 vc = card->vcs[i];
2674 if (!vc)
2675 continue;
2676
2677 vcc = NULL;
2678 if (vc->tx_vcc)
2679 vcc = vc->tx_vcc;
2680 if (!vcc)
2681 continue;
2682 if (left--)
2683 continue;
2684
2685 p = page;
2686 p += sprintf(p, " %4u: %u.%u: ", i, vcc->vpi, vcc->vci);
2687 tct = (unsigned long) (card->tct_base + i * SAR_SRAM_TCT_SIZE);
2688
2689 for (i = 0; i < 8; i++)
2690 p += sprintf(p, " %08x", read_sram(card, tct + i));
2691 p += sprintf(p, "\n");
2692 return p - page;
2693 }
2694 return 0;
2695 }
2696
2697 /*****************************************************************************/
2698 /* */
2699 /* Interrupt handler */
2700 /* */
2701 /*****************************************************************************/
2702
2703 static void
idt77252_collect_stat(struct idt77252_dev * card)2704 idt77252_collect_stat(struct idt77252_dev *card)
2705 {
2706 (void) readl(SAR_REG_CDC);
2707 (void) readl(SAR_REG_VPEC);
2708 (void) readl(SAR_REG_ICC);
2709
2710 }
2711
2712 static irqreturn_t
idt77252_interrupt(int irq,void * dev_id)2713 idt77252_interrupt(int irq, void *dev_id)
2714 {
2715 struct idt77252_dev *card = dev_id;
2716 u32 stat;
2717
2718 stat = readl(SAR_REG_STAT) & 0xffff;
2719 if (!stat) /* no interrupt for us */
2720 return IRQ_NONE;
2721
2722 if (test_and_set_bit(IDT77252_BIT_INTERRUPT, &card->flags)) {
2723 printk("%s: Re-entering irq_handler()\n", card->name);
2724 goto out;
2725 }
2726
2727 writel(stat, SAR_REG_STAT); /* reset interrupt */
2728
2729 if (stat & SAR_STAT_TSIF) { /* entry written to TSQ */
2730 INTPRINTK("%s: TSIF\n", card->name);
2731 card->irqstat[15]++;
2732 idt77252_tx(card);
2733 }
2734 if (stat & SAR_STAT_TXICP) { /* Incomplete CS-PDU has */
2735 INTPRINTK("%s: TXICP\n", card->name);
2736 card->irqstat[14]++;
2737 #ifdef CONFIG_ATM_IDT77252_DEBUG
2738 idt77252_tx_dump(card);
2739 #endif
2740 }
2741 if (stat & SAR_STAT_TSQF) { /* TSQ 7/8 full */
2742 INTPRINTK("%s: TSQF\n", card->name);
2743 card->irqstat[12]++;
2744 idt77252_tx(card);
2745 }
2746 if (stat & SAR_STAT_TMROF) { /* Timer overflow */
2747 INTPRINTK("%s: TMROF\n", card->name);
2748 card->irqstat[11]++;
2749 idt77252_collect_stat(card);
2750 }
2751
2752 if (stat & SAR_STAT_EPDU) { /* Got complete CS-PDU */
2753 INTPRINTK("%s: EPDU\n", card->name);
2754 card->irqstat[5]++;
2755 idt77252_rx(card);
2756 }
2757 if (stat & SAR_STAT_RSQAF) { /* RSQ is 7/8 full */
2758 INTPRINTK("%s: RSQAF\n", card->name);
2759 card->irqstat[1]++;
2760 idt77252_rx(card);
2761 }
2762 if (stat & SAR_STAT_RSQF) { /* RSQ is full */
2763 INTPRINTK("%s: RSQF\n", card->name);
2764 card->irqstat[6]++;
2765 idt77252_rx(card);
2766 }
2767 if (stat & SAR_STAT_RAWCF) { /* Raw cell received */
2768 INTPRINTK("%s: RAWCF\n", card->name);
2769 card->irqstat[4]++;
2770 idt77252_rx_raw(card);
2771 }
2772
2773 if (stat & SAR_STAT_PHYI) { /* PHY device interrupt */
2774 INTPRINTK("%s: PHYI", card->name);
2775 card->irqstat[10]++;
2776 if (card->atmdev->phy && card->atmdev->phy->interrupt)
2777 card->atmdev->phy->interrupt(card->atmdev);
2778 }
2779
2780 if (stat & (SAR_STAT_FBQ0A | SAR_STAT_FBQ1A |
2781 SAR_STAT_FBQ2A | SAR_STAT_FBQ3A)) {
2782
2783 writel(readl(SAR_REG_CFG) & ~(SAR_CFG_FBIE), SAR_REG_CFG);
2784
2785 INTPRINTK("%s: FBQA: %04x\n", card->name, stat);
2786
2787 if (stat & SAR_STAT_FBQ0A)
2788 card->irqstat[2]++;
2789 if (stat & SAR_STAT_FBQ1A)
2790 card->irqstat[3]++;
2791 if (stat & SAR_STAT_FBQ2A)
2792 card->irqstat[7]++;
2793 if (stat & SAR_STAT_FBQ3A)
2794 card->irqstat[8]++;
2795
2796 schedule_work(&card->tqueue);
2797 }
2798
2799 out:
2800 clear_bit(IDT77252_BIT_INTERRUPT, &card->flags);
2801 return IRQ_HANDLED;
2802 }
2803
2804 static void
idt77252_softint(struct work_struct * work)2805 idt77252_softint(struct work_struct *work)
2806 {
2807 struct idt77252_dev *card =
2808 container_of(work, struct idt77252_dev, tqueue);
2809 u32 stat;
2810 int done;
2811
2812 for (done = 1; ; done = 1) {
2813 stat = readl(SAR_REG_STAT) >> 16;
2814
2815 if ((stat & 0x0f) < SAR_FBQ0_HIGH) {
2816 add_rx_skb(card, 0, SAR_FB_SIZE_0, 32);
2817 done = 0;
2818 }
2819
2820 stat >>= 4;
2821 if ((stat & 0x0f) < SAR_FBQ1_HIGH) {
2822 add_rx_skb(card, 1, SAR_FB_SIZE_1, 32);
2823 done = 0;
2824 }
2825
2826 stat >>= 4;
2827 if ((stat & 0x0f) < SAR_FBQ2_HIGH) {
2828 add_rx_skb(card, 2, SAR_FB_SIZE_2, 32);
2829 done = 0;
2830 }
2831
2832 stat >>= 4;
2833 if ((stat & 0x0f) < SAR_FBQ3_HIGH) {
2834 add_rx_skb(card, 3, SAR_FB_SIZE_3, 32);
2835 done = 0;
2836 }
2837
2838 if (done)
2839 break;
2840 }
2841
2842 writel(readl(SAR_REG_CFG) | SAR_CFG_FBIE, SAR_REG_CFG);
2843 }
2844
2845
2846 static int
open_card_oam(struct idt77252_dev * card)2847 open_card_oam(struct idt77252_dev *card)
2848 {
2849 unsigned long flags;
2850 unsigned long addr;
2851 struct vc_map *vc;
2852 int vpi, vci;
2853 int index;
2854 u32 rcte;
2855
2856 for (vpi = 0; vpi < (1 << card->vpibits); vpi++) {
2857 for (vci = 3; vci < 5; vci++) {
2858 index = VPCI2VC(card, vpi, vci);
2859
2860 vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2861 if (!vc) {
2862 printk("%s: can't alloc vc\n", card->name);
2863 return -ENOMEM;
2864 }
2865 vc->index = index;
2866 card->vcs[index] = vc;
2867
2868 flush_rx_pool(card, &vc->rcv.rx_pool);
2869
2870 rcte = SAR_RCTE_CONNECTOPEN |
2871 SAR_RCTE_RAWCELLINTEN |
2872 SAR_RCTE_RCQ |
2873 SAR_RCTE_FBP_1;
2874
2875 addr = card->rct_base + (vc->index << 2);
2876 write_sram(card, addr, rcte);
2877
2878 spin_lock_irqsave(&card->cmd_lock, flags);
2879 writel(SAR_CMD_OPEN_CONNECTION | (addr << 2),
2880 SAR_REG_CMD);
2881 waitfor_idle(card);
2882 spin_unlock_irqrestore(&card->cmd_lock, flags);
2883 }
2884 }
2885
2886 return 0;
2887 }
2888
2889 static void
close_card_oam(struct idt77252_dev * card)2890 close_card_oam(struct idt77252_dev *card)
2891 {
2892 unsigned long flags;
2893 unsigned long addr;
2894 struct vc_map *vc;
2895 int vpi, vci;
2896 int index;
2897
2898 for (vpi = 0; vpi < (1 << card->vpibits); vpi++) {
2899 for (vci = 3; vci < 5; vci++) {
2900 index = VPCI2VC(card, vpi, vci);
2901 vc = card->vcs[index];
2902
2903 addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE;
2904
2905 spin_lock_irqsave(&card->cmd_lock, flags);
2906 writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2),
2907 SAR_REG_CMD);
2908 waitfor_idle(card);
2909 spin_unlock_irqrestore(&card->cmd_lock, flags);
2910
2911 if (skb_queue_len(&vc->rcv.rx_pool.queue) != 0) {
2912 DPRINTK("%s: closing a VC "
2913 "with pending rx buffers.\n",
2914 card->name);
2915
2916 recycle_rx_pool_skb(card, &vc->rcv.rx_pool);
2917 }
2918 }
2919 }
2920 }
2921
2922 static int
open_card_ubr0(struct idt77252_dev * card)2923 open_card_ubr0(struct idt77252_dev *card)
2924 {
2925 struct vc_map *vc;
2926
2927 vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2928 if (!vc) {
2929 printk("%s: can't alloc vc\n", card->name);
2930 return -ENOMEM;
2931 }
2932 card->vcs[0] = vc;
2933 vc->class = SCHED_UBR0;
2934
2935 vc->scq = alloc_scq(card, vc->class);
2936 if (!vc->scq) {
2937 printk("%s: can't get SCQ.\n", card->name);
2938 return -ENOMEM;
2939 }
2940
2941 card->scd2vc[0] = vc;
2942 vc->scd_index = 0;
2943 vc->scq->scd = card->scd_base;
2944
2945 fill_scd(card, vc->scq, vc->class);
2946
2947 write_sram(card, card->tct_base + 0, TCT_UBR | card->scd_base);
2948 write_sram(card, card->tct_base + 1, 0);
2949 write_sram(card, card->tct_base + 2, 0);
2950 write_sram(card, card->tct_base + 3, 0);
2951 write_sram(card, card->tct_base + 4, 0);
2952 write_sram(card, card->tct_base + 5, 0);
2953 write_sram(card, card->tct_base + 6, 0);
2954 write_sram(card, card->tct_base + 7, TCT_FLAG_UBR);
2955
2956 clear_bit(VCF_IDLE, &vc->flags);
2957 writel(TCMDQ_START | 0, SAR_REG_TCMDQ);
2958 return 0;
2959 }
2960
2961 static int
idt77252_dev_open(struct idt77252_dev * card)2962 idt77252_dev_open(struct idt77252_dev *card)
2963 {
2964 u32 conf;
2965
2966 if (!test_bit(IDT77252_BIT_INIT, &card->flags)) {
2967 printk("%s: SAR not yet initialized.\n", card->name);
2968 return -1;
2969 }
2970
2971 conf = SAR_CFG_RXPTH| /* enable receive path */
2972 SAR_RX_DELAY | /* interrupt on complete PDU */
2973 SAR_CFG_RAWIE | /* interrupt enable on raw cells */
2974 SAR_CFG_RQFIE | /* interrupt on RSQ almost full */
2975 SAR_CFG_TMOIE | /* interrupt on timer overflow */
2976 SAR_CFG_FBIE | /* interrupt on low free buffers */
2977 SAR_CFG_TXEN | /* transmit operation enable */
2978 SAR_CFG_TXINT | /* interrupt on transmit status */
2979 SAR_CFG_TXUIE | /* interrupt on transmit underrun */
2980 SAR_CFG_TXSFI | /* interrupt on TSQ almost full */
2981 SAR_CFG_PHYIE /* enable PHY interrupts */
2982 ;
2983
2984 #ifdef CONFIG_ATM_IDT77252_RCV_ALL
2985 /* Test RAW cell receive. */
2986 conf |= SAR_CFG_VPECA;
2987 #endif
2988
2989 writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG);
2990
2991 if (open_card_oam(card)) {
2992 printk("%s: Error initializing OAM.\n", card->name);
2993 return -1;
2994 }
2995
2996 if (open_card_ubr0(card)) {
2997 printk("%s: Error initializing UBR0.\n", card->name);
2998 return -1;
2999 }
3000
3001 IPRINTK("%s: opened IDT77252 ABR SAR.\n", card->name);
3002 return 0;
3003 }
3004
idt77252_dev_close(struct atm_dev * dev)3005 static void idt77252_dev_close(struct atm_dev *dev)
3006 {
3007 struct idt77252_dev *card = dev->dev_data;
3008 u32 conf;
3009
3010 close_card_oam(card);
3011
3012 conf = SAR_CFG_RXPTH | /* enable receive path */
3013 SAR_RX_DELAY | /* interrupt on complete PDU */
3014 SAR_CFG_RAWIE | /* interrupt enable on raw cells */
3015 SAR_CFG_RQFIE | /* interrupt on RSQ almost full */
3016 SAR_CFG_TMOIE | /* interrupt on timer overflow */
3017 SAR_CFG_FBIE | /* interrupt on low free buffers */
3018 SAR_CFG_TXEN | /* transmit operation enable */
3019 SAR_CFG_TXINT | /* interrupt on transmit status */
3020 SAR_CFG_TXUIE | /* interrupt on xmit underrun */
3021 SAR_CFG_TXSFI /* interrupt on TSQ almost full */
3022 ;
3023
3024 writel(readl(SAR_REG_CFG) & ~(conf), SAR_REG_CFG);
3025
3026 DIPRINTK("%s: closed IDT77252 ABR SAR.\n", card->name);
3027 }
3028
3029
3030 /*****************************************************************************/
3031 /* */
3032 /* Initialisation and Deinitialization of IDT77252 */
3033 /* */
3034 /*****************************************************************************/
3035
3036
3037 static void
deinit_card(struct idt77252_dev * card)3038 deinit_card(struct idt77252_dev *card)
3039 {
3040 struct sk_buff *skb;
3041 int i, j;
3042
3043 if (!test_bit(IDT77252_BIT_INIT, &card->flags)) {
3044 printk("%s: SAR not yet initialized.\n", card->name);
3045 return;
3046 }
3047 DIPRINTK("idt77252: deinitialize card %u\n", card->index);
3048
3049 writel(0, SAR_REG_CFG);
3050
3051 if (card->atmdev)
3052 atm_dev_deregister(card->atmdev);
3053
3054 for (i = 0; i < 4; i++) {
3055 for (j = 0; j < FBQ_SIZE; j++) {
3056 skb = card->sbpool[i].skb[j];
3057 if (skb) {
3058 dma_unmap_single(&card->pcidev->dev,
3059 IDT77252_PRV_PADDR(skb),
3060 (skb_end_pointer(skb) -
3061 skb->data),
3062 DMA_FROM_DEVICE);
3063 card->sbpool[i].skb[j] = NULL;
3064 dev_kfree_skb(skb);
3065 }
3066 }
3067 }
3068
3069 vfree(card->soft_tst);
3070
3071 vfree(card->scd2vc);
3072
3073 vfree(card->vcs);
3074
3075 if (card->raw_cell_hnd) {
3076 dma_free_coherent(&card->pcidev->dev, 2 * sizeof(u32),
3077 card->raw_cell_hnd, card->raw_cell_paddr);
3078 }
3079
3080 if (card->rsq.base) {
3081 DIPRINTK("%s: Release RSQ ...\n", card->name);
3082 deinit_rsq(card);
3083 }
3084
3085 if (card->tsq.base) {
3086 DIPRINTK("%s: Release TSQ ...\n", card->name);
3087 deinit_tsq(card);
3088 }
3089
3090 DIPRINTK("idt77252: Release IRQ.\n");
3091 free_irq(card->pcidev->irq, card);
3092
3093 for (i = 0; i < 4; i++) {
3094 if (card->fbq[i])
3095 iounmap(card->fbq[i]);
3096 }
3097
3098 if (card->membase)
3099 iounmap(card->membase);
3100
3101 clear_bit(IDT77252_BIT_INIT, &card->flags);
3102 DIPRINTK("%s: Card deinitialized.\n", card->name);
3103 }
3104
3105
init_sram(struct idt77252_dev * card)3106 static void init_sram(struct idt77252_dev *card)
3107 {
3108 int i;
3109
3110 for (i = 0; i < card->sramsize; i += 4)
3111 write_sram(card, (i >> 2), 0);
3112
3113 /* set SRAM layout for THIS card */
3114 if (card->sramsize == (512 * 1024)) {
3115 card->tct_base = SAR_SRAM_TCT_128_BASE;
3116 card->tct_size = (SAR_SRAM_TCT_128_TOP - card->tct_base + 1)
3117 / SAR_SRAM_TCT_SIZE;
3118 card->rct_base = SAR_SRAM_RCT_128_BASE;
3119 card->rct_size = (SAR_SRAM_RCT_128_TOP - card->rct_base + 1)
3120 / SAR_SRAM_RCT_SIZE;
3121 card->rt_base = SAR_SRAM_RT_128_BASE;
3122 card->scd_base = SAR_SRAM_SCD_128_BASE;
3123 card->scd_size = (SAR_SRAM_SCD_128_TOP - card->scd_base + 1)
3124 / SAR_SRAM_SCD_SIZE;
3125 card->tst[0] = SAR_SRAM_TST1_128_BASE;
3126 card->tst[1] = SAR_SRAM_TST2_128_BASE;
3127 card->tst_size = SAR_SRAM_TST1_128_TOP - card->tst[0] + 1;
3128 card->abrst_base = SAR_SRAM_ABRSTD_128_BASE;
3129 card->abrst_size = SAR_ABRSTD_SIZE_8K;
3130 card->fifo_base = SAR_SRAM_FIFO_128_BASE;
3131 card->fifo_size = SAR_RXFD_SIZE_32K;
3132 } else {
3133 card->tct_base = SAR_SRAM_TCT_32_BASE;
3134 card->tct_size = (SAR_SRAM_TCT_32_TOP - card->tct_base + 1)
3135 / SAR_SRAM_TCT_SIZE;
3136 card->rct_base = SAR_SRAM_RCT_32_BASE;
3137 card->rct_size = (SAR_SRAM_RCT_32_TOP - card->rct_base + 1)
3138 / SAR_SRAM_RCT_SIZE;
3139 card->rt_base = SAR_SRAM_RT_32_BASE;
3140 card->scd_base = SAR_SRAM_SCD_32_BASE;
3141 card->scd_size = (SAR_SRAM_SCD_32_TOP - card->scd_base + 1)
3142 / SAR_SRAM_SCD_SIZE;
3143 card->tst[0] = SAR_SRAM_TST1_32_BASE;
3144 card->tst[1] = SAR_SRAM_TST2_32_BASE;
3145 card->tst_size = (SAR_SRAM_TST1_32_TOP - card->tst[0] + 1);
3146 card->abrst_base = SAR_SRAM_ABRSTD_32_BASE;
3147 card->abrst_size = SAR_ABRSTD_SIZE_1K;
3148 card->fifo_base = SAR_SRAM_FIFO_32_BASE;
3149 card->fifo_size = SAR_RXFD_SIZE_4K;
3150 }
3151
3152 /* Initialize TCT */
3153 for (i = 0; i < card->tct_size; i++) {
3154 write_sram(card, i * SAR_SRAM_TCT_SIZE + 0, 0);
3155 write_sram(card, i * SAR_SRAM_TCT_SIZE + 1, 0);
3156 write_sram(card, i * SAR_SRAM_TCT_SIZE + 2, 0);
3157 write_sram(card, i * SAR_SRAM_TCT_SIZE + 3, 0);
3158 write_sram(card, i * SAR_SRAM_TCT_SIZE + 4, 0);
3159 write_sram(card, i * SAR_SRAM_TCT_SIZE + 5, 0);
3160 write_sram(card, i * SAR_SRAM_TCT_SIZE + 6, 0);
3161 write_sram(card, i * SAR_SRAM_TCT_SIZE + 7, 0);
3162 }
3163
3164 /* Initialize RCT */
3165 for (i = 0; i < card->rct_size; i++) {
3166 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE,
3167 (u32) SAR_RCTE_RAWCELLINTEN);
3168 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 1,
3169 (u32) 0);
3170 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 2,
3171 (u32) 0);
3172 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 3,
3173 (u32) 0xffffffff);
3174 }
3175
3176 writel((SAR_FBQ0_LOW << 28) | (SAR_FB_SIZE_0 / 48), SAR_REG_FBQS0);
3177 writel((SAR_FBQ1_LOW << 28) | (SAR_FB_SIZE_1 / 48), SAR_REG_FBQS1);
3178 writel((SAR_FBQ2_LOW << 28) | (SAR_FB_SIZE_2 / 48), SAR_REG_FBQS2);
3179 writel((SAR_FBQ3_LOW << 28) | (SAR_FB_SIZE_3 / 48), SAR_REG_FBQS3);
3180
3181 /* Initialize rate table */
3182 for (i = 0; i < 256; i++) {
3183 write_sram(card, card->rt_base + i, log_to_rate[i]);
3184 }
3185
3186 for (i = 0; i < 128; i++) {
3187 unsigned int tmp;
3188
3189 tmp = rate_to_log[(i << 2) + 0] << 0;
3190 tmp |= rate_to_log[(i << 2) + 1] << 8;
3191 tmp |= rate_to_log[(i << 2) + 2] << 16;
3192 tmp |= rate_to_log[(i << 2) + 3] << 24;
3193 write_sram(card, card->rt_base + 256 + i, tmp);
3194 }
3195
3196 #if 0 /* Fill RDF and AIR tables. */
3197 for (i = 0; i < 128; i++) {
3198 unsigned int tmp;
3199
3200 tmp = RDF[0][(i << 1) + 0] << 16;
3201 tmp |= RDF[0][(i << 1) + 1] << 0;
3202 write_sram(card, card->rt_base + 512 + i, tmp);
3203 }
3204
3205 for (i = 0; i < 128; i++) {
3206 unsigned int tmp;
3207
3208 tmp = AIR[0][(i << 1) + 0] << 16;
3209 tmp |= AIR[0][(i << 1) + 1] << 0;
3210 write_sram(card, card->rt_base + 640 + i, tmp);
3211 }
3212 #endif
3213
3214 IPRINTK("%s: initialize rate table ...\n", card->name);
3215 writel(card->rt_base << 2, SAR_REG_RTBL);
3216
3217 /* Initialize TSTs */
3218 IPRINTK("%s: initialize TST ...\n", card->name);
3219 card->tst_free = card->tst_size - 2; /* last two are jumps */
3220
3221 for (i = card->tst[0]; i < card->tst[0] + card->tst_size - 2; i++)
3222 write_sram(card, i, TSTE_OPC_VAR);
3223 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2));
3224 idt77252_sram_write_errors = 1;
3225 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2));
3226 idt77252_sram_write_errors = 0;
3227 for (i = card->tst[1]; i < card->tst[1] + card->tst_size - 2; i++)
3228 write_sram(card, i, TSTE_OPC_VAR);
3229 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2));
3230 idt77252_sram_write_errors = 1;
3231 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2));
3232 idt77252_sram_write_errors = 0;
3233
3234 card->tst_index = 0;
3235 writel(card->tst[0] << 2, SAR_REG_TSTB);
3236
3237 /* Initialize ABRSTD and Receive FIFO */
3238 IPRINTK("%s: initialize ABRSTD ...\n", card->name);
3239 writel(card->abrst_size | (card->abrst_base << 2),
3240 SAR_REG_ABRSTD);
3241
3242 IPRINTK("%s: initialize receive fifo ...\n", card->name);
3243 writel(card->fifo_size | (card->fifo_base << 2),
3244 SAR_REG_RXFD);
3245
3246 IPRINTK("%s: SRAM initialization complete.\n", card->name);
3247 }
3248
init_card(struct atm_dev * dev)3249 static int init_card(struct atm_dev *dev)
3250 {
3251 struct idt77252_dev *card = dev->dev_data;
3252 struct pci_dev *pcidev = card->pcidev;
3253 unsigned long tmpl, modl;
3254 unsigned int linkrate, rsvdcr;
3255 unsigned int tst_entries;
3256 struct net_device *tmp;
3257 char tname[10];
3258
3259 u32 size;
3260 u_char pci_byte;
3261 u32 conf;
3262 int i, k;
3263
3264 if (test_bit(IDT77252_BIT_INIT, &card->flags)) {
3265 printk("Error: SAR already initialized.\n");
3266 return -1;
3267 }
3268
3269 /*****************************************************************/
3270 /* P C I C O N F I G U R A T I O N */
3271 /*****************************************************************/
3272
3273 /* Set PCI Retry-Timeout and TRDY timeout */
3274 IPRINTK("%s: Checking PCI retries.\n", card->name);
3275 if (pci_read_config_byte(pcidev, 0x40, &pci_byte) != 0) {
3276 printk("%s: can't read PCI retry timeout.\n", card->name);
3277 deinit_card(card);
3278 return -1;
3279 }
3280 if (pci_byte != 0) {
3281 IPRINTK("%s: PCI retry timeout: %d, set to 0.\n",
3282 card->name, pci_byte);
3283 if (pci_write_config_byte(pcidev, 0x40, 0) != 0) {
3284 printk("%s: can't set PCI retry timeout.\n",
3285 card->name);
3286 deinit_card(card);
3287 return -1;
3288 }
3289 }
3290 IPRINTK("%s: Checking PCI TRDY.\n", card->name);
3291 if (pci_read_config_byte(pcidev, 0x41, &pci_byte) != 0) {
3292 printk("%s: can't read PCI TRDY timeout.\n", card->name);
3293 deinit_card(card);
3294 return -1;
3295 }
3296 if (pci_byte != 0) {
3297 IPRINTK("%s: PCI TRDY timeout: %d, set to 0.\n",
3298 card->name, pci_byte);
3299 if (pci_write_config_byte(pcidev, 0x41, 0) != 0) {
3300 printk("%s: can't set PCI TRDY timeout.\n", card->name);
3301 deinit_card(card);
3302 return -1;
3303 }
3304 }
3305 /* Reset Timer register */
3306 if (readl(SAR_REG_STAT) & SAR_STAT_TMROF) {
3307 printk("%s: resetting timer overflow.\n", card->name);
3308 writel(SAR_STAT_TMROF, SAR_REG_STAT);
3309 }
3310 IPRINTK("%s: Request IRQ ... ", card->name);
3311 if (request_irq(pcidev->irq, idt77252_interrupt, IRQF_SHARED,
3312 card->name, card) != 0) {
3313 printk("%s: can't allocate IRQ.\n", card->name);
3314 deinit_card(card);
3315 return -1;
3316 }
3317 IPRINTK("got %d.\n", pcidev->irq);
3318
3319 /*****************************************************************/
3320 /* C H E C K A N D I N I T S R A M */
3321 /*****************************************************************/
3322
3323 IPRINTK("%s: Initializing SRAM\n", card->name);
3324
3325 /* preset size of connecton table, so that init_sram() knows about it */
3326 conf = SAR_CFG_TX_FIFO_SIZE_9 | /* Use maximum fifo size */
3327 SAR_CFG_RXSTQ_SIZE_8k | /* Receive Status Queue is 8k */
3328 SAR_CFG_IDLE_CLP | /* Set CLP on idle cells */
3329 #ifndef ATM_IDT77252_SEND_IDLE
3330 SAR_CFG_NO_IDLE | /* Do not send idle cells */
3331 #endif
3332 0;
3333
3334 if (card->sramsize == (512 * 1024))
3335 conf |= SAR_CFG_CNTBL_1k;
3336 else
3337 conf |= SAR_CFG_CNTBL_512;
3338
3339 switch (vpibits) {
3340 case 0:
3341 conf |= SAR_CFG_VPVCS_0;
3342 break;
3343 default:
3344 case 1:
3345 conf |= SAR_CFG_VPVCS_1;
3346 break;
3347 case 2:
3348 conf |= SAR_CFG_VPVCS_2;
3349 break;
3350 case 8:
3351 conf |= SAR_CFG_VPVCS_8;
3352 break;
3353 }
3354
3355 writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG);
3356
3357 init_sram(card);
3358
3359 /********************************************************************/
3360 /* 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 */
3361 /********************************************************************/
3362 /* Initialize TSQ */
3363 if (0 != init_tsq(card)) {
3364 deinit_card(card);
3365 return -1;
3366 }
3367 /* Initialize RSQ */
3368 if (0 != init_rsq(card)) {
3369 deinit_card(card);
3370 return -1;
3371 }
3372
3373 card->vpibits = vpibits;
3374 if (card->sramsize == (512 * 1024)) {
3375 card->vcibits = 10 - card->vpibits;
3376 } else {
3377 card->vcibits = 9 - card->vpibits;
3378 }
3379
3380 card->vcimask = 0;
3381 for (k = 0, i = 1; k < card->vcibits; k++) {
3382 card->vcimask |= i;
3383 i <<= 1;
3384 }
3385
3386 IPRINTK("%s: Setting VPI/VCI mask to zero.\n", card->name);
3387 writel(0, SAR_REG_VPM);
3388
3389 /* Little Endian Order */
3390 writel(0, SAR_REG_GP);
3391
3392 /* Initialize RAW Cell Handle Register */
3393 card->raw_cell_hnd = dma_alloc_coherent(&card->pcidev->dev,
3394 2 * sizeof(u32),
3395 &card->raw_cell_paddr,
3396 GFP_KERNEL);
3397 if (!card->raw_cell_hnd) {
3398 printk("%s: memory allocation failure.\n", card->name);
3399 deinit_card(card);
3400 return -1;
3401 }
3402 writel(card->raw_cell_paddr, SAR_REG_RAWHND);
3403 IPRINTK("%s: raw cell handle is at 0x%p.\n", card->name,
3404 card->raw_cell_hnd);
3405
3406 size = sizeof(struct vc_map *) * card->tct_size;
3407 IPRINTK("%s: allocate %d byte for VC map.\n", card->name, size);
3408 card->vcs = vzalloc(size);
3409 if (!card->vcs) {
3410 printk("%s: memory allocation failure.\n", card->name);
3411 deinit_card(card);
3412 return -1;
3413 }
3414
3415 size = sizeof(struct vc_map *) * card->scd_size;
3416 IPRINTK("%s: allocate %d byte for SCD to VC mapping.\n",
3417 card->name, size);
3418 card->scd2vc = vzalloc(size);
3419 if (!card->scd2vc) {
3420 printk("%s: memory allocation failure.\n", card->name);
3421 deinit_card(card);
3422 return -1;
3423 }
3424
3425 size = sizeof(struct tst_info) * (card->tst_size - 2);
3426 IPRINTK("%s: allocate %d byte for TST to VC mapping.\n",
3427 card->name, size);
3428 card->soft_tst = vmalloc(size);
3429 if (!card->soft_tst) {
3430 printk("%s: memory allocation failure.\n", card->name);
3431 deinit_card(card);
3432 return -1;
3433 }
3434 for (i = 0; i < card->tst_size - 2; i++) {
3435 card->soft_tst[i].tste = TSTE_OPC_VAR;
3436 card->soft_tst[i].vc = NULL;
3437 }
3438
3439 if (dev->phy == NULL) {
3440 printk("%s: No LT device defined.\n", card->name);
3441 deinit_card(card);
3442 return -1;
3443 }
3444 if (dev->phy->ioctl == NULL) {
3445 printk("%s: LT had no IOCTL function defined.\n", card->name);
3446 deinit_card(card);
3447 return -1;
3448 }
3449
3450 #ifdef CONFIG_ATM_IDT77252_USE_SUNI
3451 /*
3452 * this is a jhs hack to get around special functionality in the
3453 * phy driver for the atecom hardware; the functionality doesn't
3454 * exist in the linux atm suni driver
3455 *
3456 * it isn't the right way to do things, but as the guy from NIST
3457 * said, talking about their measurement of the fine structure
3458 * constant, "it's good enough for government work."
3459 */
3460 linkrate = 149760000;
3461 #endif
3462
3463 card->link_pcr = (linkrate / 8 / 53);
3464 printk("%s: Linkrate on ATM line : %u bit/s, %u cell/s.\n",
3465 card->name, linkrate, card->link_pcr);
3466
3467 #ifdef ATM_IDT77252_SEND_IDLE
3468 card->utopia_pcr = card->link_pcr;
3469 #else
3470 card->utopia_pcr = (160000000 / 8 / 54);
3471 #endif
3472
3473 rsvdcr = 0;
3474 if (card->utopia_pcr > card->link_pcr)
3475 rsvdcr = card->utopia_pcr - card->link_pcr;
3476
3477 tmpl = (unsigned long) rsvdcr * ((unsigned long) card->tst_size - 2);
3478 modl = tmpl % (unsigned long)card->utopia_pcr;
3479 tst_entries = (int) (tmpl / (unsigned long)card->utopia_pcr);
3480 if (modl)
3481 tst_entries++;
3482 card->tst_free -= tst_entries;
3483 fill_tst(card, NULL, tst_entries, TSTE_OPC_NULL);
3484
3485 #ifdef HAVE_EEPROM
3486 idt77252_eeprom_init(card);
3487 printk("%s: EEPROM: %02x:", card->name,
3488 idt77252_eeprom_read_status(card));
3489
3490 for (i = 0; i < 0x80; i++) {
3491 printk(" %02x",
3492 idt77252_eeprom_read_byte(card, i)
3493 );
3494 }
3495 printk("\n");
3496 #endif /* HAVE_EEPROM */
3497
3498 /*
3499 * XXX: <hack>
3500 */
3501 sprintf(tname, "eth%d", card->index);
3502 tmp = dev_get_by_name(&init_net, tname); /* jhs: was "tmp = dev_get(tname);" */
3503 if (tmp) {
3504 memcpy(card->atmdev->esi, tmp->dev_addr, 6);
3505 dev_put(tmp);
3506 printk("%s: ESI %pM\n", card->name, card->atmdev->esi);
3507 }
3508 /*
3509 * XXX: </hack>
3510 */
3511
3512 /* Set Maximum Deficit Count for now. */
3513 writel(0xffff, SAR_REG_MDFCT);
3514
3515 set_bit(IDT77252_BIT_INIT, &card->flags);
3516
3517 XPRINTK("%s: IDT77252 ABR SAR initialization complete.\n", card->name);
3518 return 0;
3519 }
3520
3521
3522 /*****************************************************************************/
3523 /* */
3524 /* Probing of IDT77252 ABR SAR */
3525 /* */
3526 /*****************************************************************************/
3527
3528
idt77252_preset(struct idt77252_dev * card)3529 static int idt77252_preset(struct idt77252_dev *card)
3530 {
3531 u16 pci_command;
3532
3533 /*****************************************************************/
3534 /* P C I C O N F I G U R A T I O N */
3535 /*****************************************************************/
3536
3537 XPRINTK("%s: Enable PCI master and memory access for SAR.\n",
3538 card->name);
3539 if (pci_read_config_word(card->pcidev, PCI_COMMAND, &pci_command)) {
3540 printk("%s: can't read PCI_COMMAND.\n", card->name);
3541 deinit_card(card);
3542 return -1;
3543 }
3544 if (!(pci_command & PCI_COMMAND_IO)) {
3545 printk("%s: PCI_COMMAND: %04x (???)\n",
3546 card->name, pci_command);
3547 deinit_card(card);
3548 return (-1);
3549 }
3550 pci_command |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
3551 if (pci_write_config_word(card->pcidev, PCI_COMMAND, pci_command)) {
3552 printk("%s: can't write PCI_COMMAND.\n", card->name);
3553 deinit_card(card);
3554 return -1;
3555 }
3556 /*****************************************************************/
3557 /* G E N E R I C R E S E T */
3558 /*****************************************************************/
3559
3560 /* Software reset */
3561 writel(SAR_CFG_SWRST, SAR_REG_CFG);
3562 mdelay(1);
3563 writel(0, SAR_REG_CFG);
3564
3565 IPRINTK("%s: Software resetted.\n", card->name);
3566 return 0;
3567 }
3568
3569
probe_sram(struct idt77252_dev * card)3570 static unsigned long probe_sram(struct idt77252_dev *card)
3571 {
3572 u32 data, addr;
3573
3574 writel(0, SAR_REG_DR0);
3575 writel(SAR_CMD_WRITE_SRAM | (0 << 2), SAR_REG_CMD);
3576
3577 for (addr = 0x4000; addr < 0x80000; addr += 0x4000) {
3578 writel(ATM_POISON, SAR_REG_DR0);
3579 writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD);
3580
3581 writel(SAR_CMD_READ_SRAM | (0 << 2), SAR_REG_CMD);
3582 data = readl(SAR_REG_DR0);
3583
3584 if (data != 0)
3585 break;
3586 }
3587
3588 return addr * sizeof(u32);
3589 }
3590
idt77252_init_one(struct pci_dev * pcidev,const struct pci_device_id * id)3591 static int idt77252_init_one(struct pci_dev *pcidev,
3592 const struct pci_device_id *id)
3593 {
3594 static struct idt77252_dev **last = &idt77252_chain;
3595 static int index = 0;
3596
3597 unsigned long membase, srambase;
3598 struct idt77252_dev *card;
3599 struct atm_dev *dev;
3600 int i, err;
3601
3602
3603 if ((err = pci_enable_device(pcidev))) {
3604 printk("idt77252: can't enable PCI device at %s\n", pci_name(pcidev));
3605 return err;
3606 }
3607
3608 if ((err = dma_set_mask_and_coherent(&pcidev->dev, DMA_BIT_MASK(32)))) {
3609 printk("idt77252: can't enable DMA for PCI device at %s\n", pci_name(pcidev));
3610 return err;
3611 }
3612
3613 card = kzalloc(sizeof(struct idt77252_dev), GFP_KERNEL);
3614 if (!card) {
3615 printk("idt77252-%d: can't allocate private data\n", index);
3616 err = -ENOMEM;
3617 goto err_out_disable_pdev;
3618 }
3619 card->revision = pcidev->revision;
3620 card->index = index;
3621 card->pcidev = pcidev;
3622 sprintf(card->name, "idt77252-%d", card->index);
3623
3624 INIT_WORK(&card->tqueue, idt77252_softint);
3625
3626 membase = pci_resource_start(pcidev, 1);
3627 srambase = pci_resource_start(pcidev, 2);
3628
3629 mutex_init(&card->mutex);
3630 spin_lock_init(&card->cmd_lock);
3631 spin_lock_init(&card->tst_lock);
3632
3633 timer_setup(&card->tst_timer, tst_timer, 0);
3634
3635 /* Do the I/O remapping... */
3636 card->membase = ioremap(membase, 1024);
3637 if (!card->membase) {
3638 printk("%s: can't ioremap() membase\n", card->name);
3639 err = -EIO;
3640 goto err_out_free_card;
3641 }
3642
3643 if (idt77252_preset(card)) {
3644 printk("%s: preset failed\n", card->name);
3645 err = -EIO;
3646 goto err_out_iounmap;
3647 }
3648
3649 dev = atm_dev_register("idt77252", &pcidev->dev, &idt77252_ops, -1,
3650 NULL);
3651 if (!dev) {
3652 printk("%s: can't register atm device\n", card->name);
3653 err = -EIO;
3654 goto err_out_iounmap;
3655 }
3656 dev->dev_data = card;
3657 card->atmdev = dev;
3658
3659 #ifdef CONFIG_ATM_IDT77252_USE_SUNI
3660 suni_init(dev);
3661 if (!dev->phy) {
3662 printk("%s: can't init SUNI\n", card->name);
3663 err = -EIO;
3664 goto err_out_deinit_card;
3665 }
3666 #endif /* CONFIG_ATM_IDT77252_USE_SUNI */
3667
3668 card->sramsize = probe_sram(card);
3669
3670 for (i = 0; i < 4; i++) {
3671 card->fbq[i] = ioremap(srambase | 0x200000 | (i << 18), 4);
3672 if (!card->fbq[i]) {
3673 printk("%s: can't ioremap() FBQ%d\n", card->name, i);
3674 err = -EIO;
3675 goto err_out_deinit_card;
3676 }
3677 }
3678
3679 printk("%s: ABR SAR (Rev %c): MEM %08lx SRAM %08lx [%u KB]\n",
3680 card->name, ((card->revision > 1) && (card->revision < 25)) ?
3681 'A' + card->revision - 1 : '?', membase, srambase,
3682 card->sramsize / 1024);
3683
3684 if (init_card(dev)) {
3685 printk("%s: init_card failed\n", card->name);
3686 err = -EIO;
3687 goto err_out_deinit_card;
3688 }
3689
3690 dev->ci_range.vpi_bits = card->vpibits;
3691 dev->ci_range.vci_bits = card->vcibits;
3692 dev->link_rate = card->link_pcr;
3693
3694 if (dev->phy->start)
3695 dev->phy->start(dev);
3696
3697 if (idt77252_dev_open(card)) {
3698 printk("%s: dev_open failed\n", card->name);
3699 err = -EIO;
3700 goto err_out_stop;
3701 }
3702
3703 *last = card;
3704 last = &card->next;
3705 index++;
3706
3707 return 0;
3708
3709 err_out_stop:
3710 if (dev->phy->stop)
3711 dev->phy->stop(dev);
3712
3713 err_out_deinit_card:
3714 deinit_card(card);
3715
3716 err_out_iounmap:
3717 iounmap(card->membase);
3718
3719 err_out_free_card:
3720 kfree(card);
3721
3722 err_out_disable_pdev:
3723 pci_disable_device(pcidev);
3724 return err;
3725 }
3726
3727 static const struct pci_device_id idt77252_pci_tbl[] =
3728 {
3729 { PCI_VDEVICE(IDT, PCI_DEVICE_ID_IDT_IDT77252), 0 },
3730 { 0, }
3731 };
3732
3733 MODULE_DEVICE_TABLE(pci, idt77252_pci_tbl);
3734
3735 static struct pci_driver idt77252_driver = {
3736 .name = "idt77252",
3737 .id_table = idt77252_pci_tbl,
3738 .probe = idt77252_init_one,
3739 };
3740
idt77252_init(void)3741 static int __init idt77252_init(void)
3742 {
3743 struct sk_buff *skb;
3744
3745 printk("%s: at %p\n", __func__, idt77252_init);
3746
3747 if (sizeof(skb->cb) < sizeof(struct atm_skb_data) +
3748 sizeof(struct idt77252_skb_prv)) {
3749 printk(KERN_ERR "%s: skb->cb is too small (%lu < %lu)\n",
3750 __func__, (unsigned long) sizeof(skb->cb),
3751 (unsigned long) sizeof(struct atm_skb_data) +
3752 sizeof(struct idt77252_skb_prv));
3753 return -EIO;
3754 }
3755
3756 return pci_register_driver(&idt77252_driver);
3757 }
3758
idt77252_exit(void)3759 static void __exit idt77252_exit(void)
3760 {
3761 struct idt77252_dev *card;
3762 struct atm_dev *dev;
3763
3764 pci_unregister_driver(&idt77252_driver);
3765
3766 while (idt77252_chain) {
3767 card = idt77252_chain;
3768 dev = card->atmdev;
3769 idt77252_chain = card->next;
3770
3771 if (dev->phy->stop)
3772 dev->phy->stop(dev);
3773 deinit_card(card);
3774 pci_disable_device(card->pcidev);
3775 kfree(card);
3776 }
3777
3778 DIPRINTK("idt77252: finished cleanup-module().\n");
3779 }
3780
3781 module_init(idt77252_init);
3782 module_exit(idt77252_exit);
3783
3784 MODULE_LICENSE("GPL");
3785
3786 module_param(vpibits, uint, 0);
3787 MODULE_PARM_DESC(vpibits, "number of VPI bits supported (0, 1, or 2)");
3788 #ifdef CONFIG_ATM_IDT77252_DEBUG
3789 module_param(debug, ulong, 0644);
3790 MODULE_PARM_DESC(debug, "debug bitmap, see drivers/atm/idt77252.h");
3791 #endif
3792
3793 MODULE_AUTHOR("Eddie C. Dost <ecd@atecom.com>");
3794 MODULE_DESCRIPTION("IDT77252 ABR SAR Driver");
3795
