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rcv reorder queue bugfix
[cor_2_6_31.git] / drivers / atm / firestream.c
blobb119640e1ee9d0f6403aae0a3156405e6a72c7bc
1
2 /* drivers/atm/firestream.c - FireStream 155 (MB86697) and
3 * FireStream 50 (MB86695) device driver
4 */
5
6 /* Written & (C) 2000 by R.E.Wolff@BitWizard.nl
7 * Copied snippets from zatm.c by Werner Almesberger, EPFL LRC/ICA
8 * and ambassador.c Copyright (C) 1995-1999 Madge Networks Ltd
9 */
10
11 /*
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 2 of the License, or
15 (at your option) any later version.
16
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
21
22 You should have received a copy of the GNU General Public License
23 along with this program; if not, write to the Free Software
24 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25
26 The GNU GPL is contained in /usr/doc/copyright/GPL on a Debian
27 system and in the file COPYING in the Linux kernel source.
28 */
29
30
31 #include <linux/module.h>
32 #include <linux/sched.h>
33 #include <linux/kernel.h>
34 #include <linux/mm.h>
35 #include <linux/pci.h>
36 #include <linux/poison.h>
37 #include <linux/errno.h>
38 #include <linux/atm.h>
39 #include <linux/atmdev.h>
40 #include <linux/sonet.h>
41 #include <linux/skbuff.h>
42 #include <linux/netdevice.h>
43 #include <linux/delay.h>
44 #include <linux/ioport.h> /* for request_region */
45 #include <linux/uio.h>
46 #include <linux/init.h>
47 #include <linux/capability.h>
48 #include <linux/bitops.h>
49 #include <asm/byteorder.h>
50 #include <asm/system.h>
51 #include <asm/string.h>
52 #include <asm/io.h>
53 #include <asm/atomic.h>
54 #include <asm/uaccess.h>
55 #include <linux/wait.h>
56
57 #include "firestream.h"
58
59 static int loopback = 0;
60 static int num=0x5a;
61
62 /* According to measurements (but they look suspicious to me!) done in
63 * '97, 37% of the packets are one cell in size. So it pays to have
64 * buffers allocated at that size. A large jump in percentage of
65 * packets occurs at packets around 536 bytes in length. So it also
66 * pays to have those pre-allocated. Unfortunately, we can't fully
67 * take advantage of this as the majority of the packets is likely to
68 * be TCP/IP (As where obviously the measurement comes from) There the
69 * link would be opened with say a 1500 byte MTU, and we can't handle
70 * smaller buffers more efficiently than the larger ones. -- REW
71 */
72
73 /* Due to the way Linux memory management works, specifying "576" as
74 * an allocation size here isn't going to help. They are allocated
75 * from 1024-byte regions anyway. With the size of the sk_buffs (quite
76 * large), it doesn't pay to allocate the smallest size (64) -- REW */
77
78 /* This is all guesswork. Hard numbers to back this up or disprove this,
79 * are appreciated. -- REW */
80
81 /* The last entry should be about 64k. However, the "buffer size" is
82 * passed to the chip in a 16 bit field. I don't know how "65536"
83 * would be interpreted. -- REW */
84
85 #define NP FS_NR_FREE_POOLS
86 static int rx_buf_sizes[NP] = {128, 256, 512, 1024, 2048, 4096, 16384, 65520};
87 /* log2: 7 8 9 10 11 12 14 16 */
88
89 #if 0
90 static int rx_pool_sizes[NP] = {1024, 1024, 512, 256, 128, 64, 32, 32};
91 #else
92 /* debug */
93 static int rx_pool_sizes[NP] = {128, 128, 128, 64, 64, 64, 32, 32};
94 #endif
95 /* log2: 10 10 9 8 7 6 5 5 */
96 /* sumlog2: 17 18 18 18 18 18 19 21 */
97 /* mem allocated: 128k 256k 256k 256k 256k 256k 512k 2M */
98 /* tot mem: almost 4M */
99
100 /* NP is shorter, so that it fits on a single line. */
101 #undef NP
102
103
104 /* Small hardware gotcha:
105
106 The FS50 CAM (VP/VC match registers) always take the lowest channel
107 number that matches. This is not a problem.
108
109 However, they also ignore whether the channel is enabled or
110 not. This means that if you allocate channel 0 to 1.2 and then
111 channel 1 to 0.0, then disabeling channel 0 and writing 0 to the
112 match channel for channel 0 will "steal" the traffic from channel
113 1, even if you correctly disable channel 0.
114
115 Workaround:
116
117 - When disabling channels, write an invalid VP/VC value to the
118 match register. (We use 0xffffffff, which in the worst case
119 matches VP/VC = <maxVP>/<maxVC>, but I expect it not to match
120 anything as some "when not in use, program to 0" bits are now
121 programmed to 1...)
122
123 - Don't initialize the match registers to 0, as 0.0 is a valid
124 channel.
125 */
126
127
128 /* Optimization hints and tips.
129
130 The FireStream chips are very capable of reducing the amount of
131 "interrupt-traffic" for the CPU. This driver requests an interrupt on EVERY
132 action. You could try to minimize this a bit.
133
134 Besides that, the userspace->kernel copy and the PCI bus are the
135 performance limiting issues for this driver.
136
137 You could queue up a bunch of outgoing packets without telling the
138 FireStream. I'm not sure that's going to win you much though. The
139 Linux layer won't tell us in advance when it's not going to give us
140 any more packets in a while. So this is tricky to implement right without
141 introducing extra delays.
142
143 -- REW
144 */
145
146
147
148
149 /* The strings that define what the RX queue entry is all about. */
150 /* Fujitsu: Please tell me which ones can have a pointer to a
151 freepool descriptor! */
152 static char *res_strings[] = {
153 "RX OK: streaming not EOP",
154 "RX OK: streaming EOP",
155 "RX OK: Single buffer packet",
156 "RX OK: packet mode",
157 "RX OK: F4 OAM (end to end)",
158 "RX OK: F4 OAM (Segment)",
159 "RX OK: F5 OAM (end to end)",
160 "RX OK: F5 OAM (Segment)",
161 "RX OK: RM cell",
162 "RX OK: TRANSP cell",
163 "RX OK: TRANSPC cell",
164 "Unmatched cell",
165 "reserved 12",
166 "reserved 13",
167 "reserved 14",
168 "Unrecognized cell",
169 "reserved 16",
170 "reassemby abort: AAL5 abort",
171 "packet purged",
172 "packet ageing timeout",
173 "channel ageing timeout",
174 "calculated length error",
175 "programmed length limit error",
176 "aal5 crc32 error",
177 "oam transp or transpc crc10 error",
178 "reserved 25",
179 "reserved 26",
180 "reserved 27",
181 "reserved 28",
182 "reserved 29",
183 "reserved 30",
184 "reassembly abort: no buffers",
185 "receive buffer overflow",
186 "change in GFC",
187 "receive buffer full",
188 "low priority discard - no receive descriptor",
189 "low priority discard - missing end of packet",
190 "reserved 41",
191 "reserved 42",
192 "reserved 43",
193 "reserved 44",
194 "reserved 45",
195 "reserved 46",
196 "reserved 47",
197 "reserved 48",
198 "reserved 49",
199 "reserved 50",
200 "reserved 51",
201 "reserved 52",
202 "reserved 53",
203 "reserved 54",
204 "reserved 55",
205 "reserved 56",
206 "reserved 57",
207 "reserved 58",
208 "reserved 59",
209 "reserved 60",
210 "reserved 61",
211 "reserved 62",
212 "reserved 63",
213 };
214
215 static char *irq_bitname[] = {
216 "LPCO",
217 "DPCO",
218 "RBRQ0_W",
219 "RBRQ1_W",
220 "RBRQ2_W",
221 "RBRQ3_W",
222 "RBRQ0_NF",
223 "RBRQ1_NF",
224 "RBRQ2_NF",
225 "RBRQ3_NF",
226 "BFP_SC",
227 "INIT",
228 "INIT_ERR",
229 "USCEO",
230 "UPEC0",
231 "VPFCO",
232 "CRCCO",
233 "HECO",
234 "TBRQ_W",
235 "TBRQ_NF",
236 "CTPQ_E",
237 "GFC_C0",
238 "PCI_FTL",
239 "CSQ_W",
240 "CSQ_NF",
241 "EXT_INT",
242 "RXDMA_S"
243 };
244
245
246 #define PHY_EOF -1
247 #define PHY_CLEARALL -2
248
249 struct reginit_item {
250 int reg, val;
251 };
252
253
254 static struct reginit_item PHY_NTC_INIT[] __devinitdata = {
255 { PHY_CLEARALL, 0x40 },
256 { 0x12, 0x0001 },
257 { 0x13, 0x7605 },
258 { 0x1A, 0x0001 },
259 { 0x1B, 0x0005 },
260 { 0x38, 0x0003 },
261 { 0x39, 0x0006 }, /* changed here to make loopback */
262 { 0x01, 0x5262 },
263 { 0x15, 0x0213 },
264 { 0x00, 0x0003 },
265 { PHY_EOF, 0}, /* -1 signals end of list */
266 };
267
268
269 /* Safetyfeature: If the card interrupts more than this number of times
270 in a jiffy (1/100th of a second) then we just disable the interrupt and
271 print a message. This prevents the system from hanging.
272
273 150000 packets per second is close to the limit a PC is going to have
274 anyway. We therefore have to disable this for production. -- REW */
275 #undef IRQ_RATE_LIMIT // 100
276
277 /* Interrupts work now. Unlike serial cards, ATM cards don't work all
278 that great without interrupts. -- REW */
279 #undef FS_POLL_FREQ // 100
280
281 /*
282 This driver can spew a whole lot of debugging output at you. If you
283 need maximum performance, you should disable the DEBUG define. To
284 aid in debugging in the field, I'm leaving the compile-time debug
285 features enabled, and disable them "runtime". That allows me to
286 instruct people with problems to enable debugging without requiring
287 them to recompile... -- REW
288 */
289 #define DEBUG
290
291 #ifdef DEBUG
292 #define fs_dprintk(f, str...) if (fs_debug & f) printk (str)
293 #else
294 #define fs_dprintk(f, str...) /* nothing */
295 #endif
296
297
298 static int fs_keystream = 0;
299
300 #ifdef DEBUG
301 /* I didn't forget to set this to zero before shipping. Hit me with a stick
302 if you get this with the debug default not set to zero again. -- REW */
303 static int fs_debug = 0;
304 #else
305 #define fs_debug 0
306 #endif
307
308 #ifdef MODULE
309 #ifdef DEBUG
310 module_param(fs_debug, int, 0644);
311 #endif
312 module_param(loopback, int, 0);
313 module_param(num, int, 0);
314 module_param(fs_keystream, int, 0);
315 /* XXX Add rx_buf_sizes, and rx_pool_sizes As per request Amar. -- REW */
316 #endif
317
318
319 #define FS_DEBUG_FLOW 0x00000001
320 #define FS_DEBUG_OPEN 0x00000002
321 #define FS_DEBUG_QUEUE 0x00000004
322 #define FS_DEBUG_IRQ 0x00000008
323 #define FS_DEBUG_INIT 0x00000010
324 #define FS_DEBUG_SEND 0x00000020
325 #define FS_DEBUG_PHY 0x00000040
326 #define FS_DEBUG_CLEANUP 0x00000080
327 #define FS_DEBUG_QOS 0x00000100
328 #define FS_DEBUG_TXQ 0x00000200
329 #define FS_DEBUG_ALLOC 0x00000400
330 #define FS_DEBUG_TXMEM 0x00000800
331 #define FS_DEBUG_QSIZE 0x00001000
332
333
334 #define func_enter() fs_dprintk(FS_DEBUG_FLOW, "fs: enter %s\n", __func__)
335 #define func_exit() fs_dprintk(FS_DEBUG_FLOW, "fs: exit %s\n", __func__)
336
337
338 static struct fs_dev *fs_boards = NULL;
339
340 #ifdef DEBUG
341
342 static void my_hd (void *addr, int len)
343 {
344 int j, ch;
345 unsigned char *ptr = addr;
346
347 while (len > 0) {
348 printk ("%p ", ptr);
349 for (j=0;j < ((len < 16)?len:16);j++) {
350 printk ("%02x %s", ptr[j], (j==7)?" ":"");
351 }
352 for ( ;j < 16;j++) {
353 printk (" %s", (j==7)?" ":"");
354 }
355 for (j=0;j < ((len < 16)?len:16);j++) {
356 ch = ptr[j];
357 printk ("%c", (ch < 0x20)?'.':((ch > 0x7f)?'.':ch));
358 }
359 printk ("\n");
360 ptr += 16;
361 len -= 16;
362 }
363 }
364 #else /* DEBUG */
365 static void my_hd (void *addr, int len){}
366 #endif /* DEBUG */
367
368 /********** free an skb (as per ATM device driver documentation) **********/
369
370 /* Hmm. If this is ATM specific, why isn't there an ATM routine for this?
371 * I copied it over from the ambassador driver. -- REW */
372
373 static inline void fs_kfree_skb (struct sk_buff * skb)
374 {
375 if (ATM_SKB(skb)->vcc->pop)
376 ATM_SKB(skb)->vcc->pop (ATM_SKB(skb)->vcc, skb);
377 else
378 dev_kfree_skb_any (skb);
379 }
380
381
382
383
384 /* It seems the ATM forum recommends this horribly complicated 16bit
385 * floating point format. Turns out the Ambassador uses the exact same
386 * encoding. I just copied it over. If Mitch agrees, I'll move it over
387 * to the atm_misc file or something like that. (and remove it from
388 * here and the ambassador driver) -- REW
389 */
390
391 /* The good thing about this format is that it is monotonic. So,
392 a conversion routine need not be very complicated. To be able to
393 round "nearest" we need to take along a few extra bits. Lets
394 put these after 16 bits, so that we can just return the top 16
395 bits of the 32bit number as the result:
396
397 int mr (unsigned int rate, int r)
398 {
399 int e = 16+9;
400 static int round[4]={0, 0, 0xffff, 0x8000};
401 if (!rate) return 0;
402 while (rate & 0xfc000000) {
403 rate >>= 1;
404 e++;
405 }
406 while (! (rate & 0xfe000000)) {
407 rate <<= 1;
408 e--;
409 }
410
411 // Now the mantissa is in positions bit 16-25. Excepf for the "hidden 1" that's in bit 26.
412 rate &= ~0x02000000;
413 // Next add in the exponent
414 rate |= e << (16+9);
415 // And perform the rounding:
416 return (rate + round[r]) >> 16;
417 }
418
419 14 lines-of-code. Compare that with the 120 that the Ambassador
420 guys needed. (would be 8 lines shorter if I'd try to really reduce
421 the number of lines:
422
423 int mr (unsigned int rate, int r)
424 {
425 int e = 16+9;
426 static int round[4]={0, 0, 0xffff, 0x8000};
427 if (!rate) return 0;
428 for (; rate & 0xfc000000 ;rate >>= 1, e++);
429 for (;!(rate & 0xfe000000);rate <<= 1, e--);
430 return ((rate & ~0x02000000) | (e << (16+9)) + round[r]) >> 16;
431 }
432
433 Exercise for the reader: Remove one more line-of-code, without
434 cheating. (Just joining two lines is cheating). (I know it's
435 possible, don't think you've beat me if you found it... If you
436 manage to lose two lines or more, keep me updated! ;-)
437
438 -- REW */
439
440
441 #define ROUND_UP 1
442 #define ROUND_DOWN 2
443 #define ROUND_NEAREST 3
444 /********** make rate (not quite as much fun as Horizon) **********/
445
446 static unsigned int make_rate (unsigned int rate, int r,
447 u16 * bits, unsigned int * actual)
448 {
449 unsigned char exp = -1; /* hush gcc */
450 unsigned int man = -1; /* hush gcc */
451
452 fs_dprintk (FS_DEBUG_QOS, "make_rate %u", rate);
453
454 /* rates in cells per second, ITU format (nasty 16-bit floating-point)
455 given 5-bit e and 9-bit m:
456 rate = EITHER (1+m/2^9)*2^e OR 0
457 bits = EITHER 1<<14 | e<<9 | m OR 0
458 (bit 15 is "reserved", bit 14 "non-zero")
459 smallest rate is 0 (special representation)
460 largest rate is (1+511/512)*2^31 = 4290772992 (< 2^32-1)
461 smallest non-zero rate is (1+0/512)*2^0 = 1 (> 0)
462 simple algorithm:
463 find position of top bit, this gives e
464 remove top bit and shift (rounding if feeling clever) by 9-e
465 */
466 /* Ambassador ucode bug: please don't set bit 14! so 0 rate not
467 representable. // This should move into the ambassador driver
468 when properly merged. -- REW */
469
470 if (rate > 0xffc00000U) {
471 /* larger than largest representable rate */
472
473 if (r == ROUND_UP) {
474 return -EINVAL;
475 } else {
476 exp = 31;
477 man = 511;
478 }
479
480 } else if (rate) {
481 /* representable rate */
482
483 exp = 31;
484 man = rate;
485
486 /* invariant: rate = man*2^(exp-31) */
487 while (!(man & (1<<31))) {
488 exp = exp - 1;
489 man = man<<1;
490 }
491
492 /* man has top bit set
493 rate = (2^31+(man-2^31))*2^(exp-31)
494 rate = (1+(man-2^31)/2^31)*2^exp
495 */
496 man = man<<1;
497 man &= 0xffffffffU; /* a nop on 32-bit systems */
498 /* rate = (1+man/2^32)*2^exp
499
500 exp is in the range 0 to 31, man is in the range 0 to 2^32-1
501 time to lose significance... we want m in the range 0 to 2^9-1
502 rounding presents a minor problem... we first decide which way
503 we are rounding (based on given rounding direction and possibly
504 the bits of the mantissa that are to be discarded).
505 */
506
507 switch (r) {
508 case ROUND_DOWN: {
509 /* just truncate */
510 man = man>>(32-9);
511 break;
512 }
513 case ROUND_UP: {
514 /* check all bits that we are discarding */
515 if (man & (~0U>>9)) {
516 man = (man>>(32-9)) + 1;
517 if (man == (1<<9)) {
518 /* no need to check for round up outside of range */
519 man = 0;
520 exp += 1;
521 }
522 } else {
523 man = (man>>(32-9));
524 }
525 break;
526 }
527 case ROUND_NEAREST: {
528 /* check msb that we are discarding */
529 if (man & (1<<(32-9-1))) {
530 man = (man>>(32-9)) + 1;
531 if (man == (1<<9)) {
532 /* no need to check for round up outside of range */
533 man = 0;
534 exp += 1;
535 }
536 } else {
537 man = (man>>(32-9));
538 }
539 break;
540 }
541 }
542
543 } else {
544 /* zero rate - not representable */
545
546 if (r == ROUND_DOWN) {
547 return -EINVAL;
548 } else {
549 exp = 0;
550 man = 0;
551 }
552 }
553
554 fs_dprintk (FS_DEBUG_QOS, "rate: man=%u, exp=%hu", man, exp);
555
556 if (bits)
557 *bits = /* (1<<14) | */ (exp<<9) | man;
558
559 if (actual)
560 *actual = (exp >= 9)
561 ? (1 << exp) + (man << (exp-9))
562 : (1 << exp) + ((man + (1<<(9-exp-1))) >> (9-exp));
563
564 return 0;
565 }
566
567
568
569
570 /* FireStream access routines */
571 /* For DEEP-DOWN debugging these can be rigged to intercept accesses to
572 certain registers or to just log all accesses. */
573
574 static inline void write_fs (struct fs_dev *dev, int offset, u32 val)
575 {
576 writel (val, dev->base + offset);
577 }
578
579
580 static inline u32 read_fs (struct fs_dev *dev, int offset)
581 {
582 return readl (dev->base + offset);
583 }
584
585
586
587 static inline struct FS_QENTRY *get_qentry (struct fs_dev *dev, struct queue *q)
588 {
589 return bus_to_virt (read_fs (dev, Q_WP(q->offset)) & Q_ADDR_MASK);
590 }
591
592
593 static void submit_qentry (struct fs_dev *dev, struct queue *q, struct FS_QENTRY *qe)
594 {
595 u32 wp;
596 struct FS_QENTRY *cqe;
597
598 /* XXX Sanity check: the write pointer can be checked to be
599 still the same as the value passed as qe... -- REW */
600 /* udelay (5); */
601 while ((wp = read_fs (dev, Q_WP (q->offset))) & Q_FULL) {
602 fs_dprintk (FS_DEBUG_TXQ, "Found queue at %x full. Waiting.\n",
603 q->offset);
604 schedule ();
605 }
606
607 wp &= ~0xf;
608 cqe = bus_to_virt (wp);
609 if (qe != cqe) {
610 fs_dprintk (FS_DEBUG_TXQ, "q mismatch! %p %p\n", qe, cqe);
611 }
612
613 write_fs (dev, Q_WP(q->offset), Q_INCWRAP);
614
615 {
616 static int c;
617 if (!(c++ % 100))
618 {
619 int rp, wp;
620 rp = read_fs (dev, Q_RP(q->offset));
621 wp = read_fs (dev, Q_WP(q->offset));
622 fs_dprintk (FS_DEBUG_TXQ, "q at %d: %x-%x: %x entries.\n",
623 q->offset, rp, wp, wp-rp);
624 }
625 }
626 }
627
628 #ifdef DEBUG_EXTRA
629 static struct FS_QENTRY pq[60];
630 static int qp;
631
632 static struct FS_BPENTRY dq[60];
633 static int qd;
634 static void *da[60];
635 #endif
636
637 static void submit_queue (struct fs_dev *dev, struct queue *q,
638 u32 cmd, u32 p1, u32 p2, u32 p3)
639 {
640 struct FS_QENTRY *qe;
641
642 qe = get_qentry (dev, q);
643 qe->cmd = cmd;
644 qe->p0 = p1;
645 qe->p1 = p2;
646 qe->p2 = p3;
647 submit_qentry (dev, q, qe);
648
649 #ifdef DEBUG_EXTRA
650 pq[qp].cmd = cmd;
651 pq[qp].p0 = p1;
652 pq[qp].p1 = p2;
653 pq[qp].p2 = p3;
654 qp++;
655 if (qp >= 60) qp = 0;
656 #endif
657 }
658
659 /* Test the "other" way one day... -- REW */
660 #if 1
661 #define submit_command submit_queue
662 #else
663
664 static void submit_command (struct fs_dev *dev, struct queue *q,
665 u32 cmd, u32 p1, u32 p2, u32 p3)
666 {
667 write_fs (dev, CMDR0, cmd);
668 write_fs (dev, CMDR1, p1);
669 write_fs (dev, CMDR2, p2);
670 write_fs (dev, CMDR3, p3);
671 }
672 #endif
673
674
675
676 static void process_return_queue (struct fs_dev *dev, struct queue *q)
677 {
678 long rq;
679 struct FS_QENTRY *qe;
680 void *tc;
681
682 while (!((rq = read_fs (dev, Q_RP(q->offset))) & Q_EMPTY)) {
683 fs_dprintk (FS_DEBUG_QUEUE, "reaping return queue entry at %lx\n", rq);
684 qe = bus_to_virt (rq);
685
686 fs_dprintk (FS_DEBUG_QUEUE, "queue entry: %08x %08x %08x %08x. (%d)\n",
687 qe->cmd, qe->p0, qe->p1, qe->p2, STATUS_CODE (qe));
688
689 switch (STATUS_CODE (qe)) {
690 case 5:
691 tc = bus_to_virt (qe->p0);
692 fs_dprintk (FS_DEBUG_ALLOC, "Free tc: %p\n", tc);
693 kfree (tc);
694 break;
695 }
696
697 write_fs (dev, Q_RP(q->offset), Q_INCWRAP);
698 }
699 }
700
701
702 static void process_txdone_queue (struct fs_dev *dev, struct queue *q)
703 {
704 long rq;
705 long tmp;
706 struct FS_QENTRY *qe;
707 struct sk_buff *skb;
708 struct FS_BPENTRY *td;
709
710 while (!((rq = read_fs (dev, Q_RP(q->offset))) & Q_EMPTY)) {
711 fs_dprintk (FS_DEBUG_QUEUE, "reaping txdone entry at %lx\n", rq);
712 qe = bus_to_virt (rq);
713
714 fs_dprintk (FS_DEBUG_QUEUE, "queue entry: %08x %08x %08x %08x: %d\n",
715 qe->cmd, qe->p0, qe->p1, qe->p2, STATUS_CODE (qe));
716
717 if (STATUS_CODE (qe) != 2)
718 fs_dprintk (FS_DEBUG_TXMEM, "queue entry: %08x %08x %08x %08x: %d\n",
719 qe->cmd, qe->p0, qe->p1, qe->p2, STATUS_CODE (qe));
720
721
722 switch (STATUS_CODE (qe)) {
723 case 0x01: /* This is for AAL0 where we put the chip in streaming mode */
724 /* Fall through */
725 case 0x02:
726 /* Process a real txdone entry. */
727 tmp = qe->p0;
728 if (tmp & 0x0f)
729 printk (KERN_WARNING "td not aligned: %ld\n", tmp);
730 tmp &= ~0x0f;
731 td = bus_to_virt (tmp);
732
733 fs_dprintk (FS_DEBUG_QUEUE, "Pool entry: %08x %08x %08x %08x %p.\n",
734 td->flags, td->next, td->bsa, td->aal_bufsize, td->skb );
735
736 skb = td->skb;
737 if (skb == FS_VCC (ATM_SKB(skb)->vcc)->last_skb) {
738 wake_up_interruptible (& FS_VCC (ATM_SKB(skb)->vcc)->close_wait);
739 FS_VCC (ATM_SKB(skb)->vcc)->last_skb = NULL;
740 }
741 td->dev->ntxpckts--;
742
743 {
744 static int c=0;
745
746 if (!(c++ % 100)) {
747 fs_dprintk (FS_DEBUG_QSIZE, "[%d]", td->dev->ntxpckts);
748 }
749 }
750
751 atomic_inc(&ATM_SKB(skb)->vcc->stats->tx);
752
753 fs_dprintk (FS_DEBUG_TXMEM, "i");
754 fs_dprintk (FS_DEBUG_ALLOC, "Free t-skb: %p\n", skb);
755 fs_kfree_skb (skb);
756
757 fs_dprintk (FS_DEBUG_ALLOC, "Free trans-d: %p\n", td);
758 memset (td, ATM_POISON_FREE, sizeof(struct FS_BPENTRY));
759 kfree (td);
760 break;
761 default:
762 /* Here we get the tx purge inhibit command ... */
763 /* Action, I believe, is "don't do anything". -- REW */
764 ;
765 }
766
767 write_fs (dev, Q_RP(q->offset), Q_INCWRAP);
768 }
769 }
770
771
772 static void process_incoming (struct fs_dev *dev, struct queue *q)
773 {
774 long rq;
775 struct FS_QENTRY *qe;
776 struct FS_BPENTRY *pe;
777 struct sk_buff *skb;
778 unsigned int channo;
779 struct atm_vcc *atm_vcc;
780
781 while (!((rq = read_fs (dev, Q_RP(q->offset))) & Q_EMPTY)) {
782 fs_dprintk (FS_DEBUG_QUEUE, "reaping incoming queue entry at %lx\n", rq);
783 qe = bus_to_virt (rq);
784
785 fs_dprintk (FS_DEBUG_QUEUE, "queue entry: %08x %08x %08x %08x. ",
786 qe->cmd, qe->p0, qe->p1, qe->p2);
787
788 fs_dprintk (FS_DEBUG_QUEUE, "-> %x: %s\n",
789 STATUS_CODE (qe),
790 res_strings[STATUS_CODE(qe)]);
791
792 pe = bus_to_virt (qe->p0);
793 fs_dprintk (FS_DEBUG_QUEUE, "Pool entry: %08x %08x %08x %08x %p %p.\n",
794 pe->flags, pe->next, pe->bsa, pe->aal_bufsize,
795 pe->skb, pe->fp);
796
797 channo = qe->cmd & 0xffff;
798
799 if (channo < dev->nchannels)
800 atm_vcc = dev->atm_vccs[channo];
801 else
802 atm_vcc = NULL;
803
804 /* Single buffer packet */
805 switch (STATUS_CODE (qe)) {
806 case 0x1:
807 /* Fall through for streaming mode */
808 case 0x2:/* Packet received OK.... */
809 if (atm_vcc) {
810 skb = pe->skb;
811 pe->fp->n--;
812 #if 0
813 fs_dprintk (FS_DEBUG_QUEUE, "Got skb: %p\n", skb);
814 if (FS_DEBUG_QUEUE & fs_debug) my_hd (bus_to_virt (pe->bsa), 0x20);
815 #endif
816 skb_put (skb, qe->p1 & 0xffff);
817 ATM_SKB(skb)->vcc = atm_vcc;
818 atomic_inc(&atm_vcc->stats->rx);
819 __net_timestamp(skb);
820 fs_dprintk (FS_DEBUG_ALLOC, "Free rec-skb: %p (pushed)\n", skb);
821 atm_vcc->push (atm_vcc, skb);
822 fs_dprintk (FS_DEBUG_ALLOC, "Free rec-d: %p\n", pe);
823 kfree (pe);
824 } else {
825 printk (KERN_ERR "Got a receive on a non-open channel %d.\n", channo);
826 }
827 break;
828 case 0x17:/* AAL 5 CRC32 error. IFF the length field is nonzero, a buffer
829 has been consumed and needs to be processed. -- REW */
830 if (qe->p1 & 0xffff) {
831 pe = bus_to_virt (qe->p0);
832 pe->fp->n--;
833 fs_dprintk (FS_DEBUG_ALLOC, "Free rec-skb: %p\n", pe->skb);
834 dev_kfree_skb_any (pe->skb);
835 fs_dprintk (FS_DEBUG_ALLOC, "Free rec-d: %p\n", pe);
836 kfree (pe);
837 }
838 if (atm_vcc)
839 atomic_inc(&atm_vcc->stats->rx_drop);
840 break;
841 case 0x1f: /* Reassembly abort: no buffers. */
842 /* Silently increment error counter. */
843 if (atm_vcc)
844 atomic_inc(&atm_vcc->stats->rx_drop);
845 break;
846 default: /* Hmm. Haven't written the code to handle the others yet... -- REW */
847 printk (KERN_WARNING "Don't know what to do with RX status %x: %s.\n",
848 STATUS_CODE(qe), res_strings[STATUS_CODE (qe)]);
849 }
850 write_fs (dev, Q_RP(q->offset), Q_INCWRAP);
851 }
852 }
853
854
855
856 #define DO_DIRECTION(tp) ((tp)->traffic_class != ATM_NONE)
857
858 static int fs_open(struct atm_vcc *atm_vcc)
859 {
860 struct fs_dev *dev;
861 struct fs_vcc *vcc;
862 struct fs_transmit_config *tc;
863 struct atm_trafprm * txtp;
864 struct atm_trafprm * rxtp;
865 /* struct fs_receive_config *rc;*/
866 /* struct FS_QENTRY *qe; */
867 int error;
868 int bfp;
869 int to;
870 unsigned short tmc0;
871 short vpi = atm_vcc->vpi;
872 int vci = atm_vcc->vci;
873
874 func_enter ();
875
876 dev = FS_DEV(atm_vcc->dev);
877 fs_dprintk (FS_DEBUG_OPEN, "fs: open on dev: %p, vcc at %p\n",
878 dev, atm_vcc);
879
880 if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
881 set_bit(ATM_VF_ADDR, &atm_vcc->flags);
882
883 if ((atm_vcc->qos.aal != ATM_AAL5) &&
884 (atm_vcc->qos.aal != ATM_AAL2))
885 return -EINVAL; /* XXX AAL0 */
886
887 fs_dprintk (FS_DEBUG_OPEN, "fs: (itf %d): open %d.%d\n",
888 atm_vcc->dev->number, atm_vcc->vpi, atm_vcc->vci);
889
890 /* XXX handle qos parameters (rate limiting) ? */
891
892 vcc = kmalloc(sizeof(struct fs_vcc), GFP_KERNEL);
893 fs_dprintk (FS_DEBUG_ALLOC, "Alloc VCC: %p(%Zd)\n", vcc, sizeof(struct fs_vcc));
894 if (!vcc) {
895 clear_bit(ATM_VF_ADDR, &atm_vcc->flags);
896 return -ENOMEM;
897 }
898
899 atm_vcc->dev_data = vcc;
900 vcc->last_skb = NULL;
901
902 init_waitqueue_head (&vcc->close_wait);
903
904 txtp = &atm_vcc->qos.txtp;
905 rxtp = &atm_vcc->qos.rxtp;
906
907 if (!test_bit(ATM_VF_PARTIAL, &atm_vcc->flags)) {
908 if (IS_FS50(dev)) {
909 /* Increment the channel numer: take a free one next time. */
910 for (to=33;to;to--, dev->channo++) {
911 /* We only have 32 channels */
912 if (dev->channo >= 32)
913 dev->channo = 0;
914 /* If we need to do RX, AND the RX is inuse, try the next */
915 if (DO_DIRECTION(rxtp) && dev->atm_vccs[dev->channo])
916 continue;
917 /* If we need to do TX, AND the TX is inuse, try the next */
918 if (DO_DIRECTION(txtp) && test_bit (dev->channo, dev->tx_inuse))
919 continue;
920 /* Ok, both are free! (or not needed) */
921 break;
922 }
923 if (!to) {
924 printk ("No more free channels for FS50..\n");
925 return -EBUSY;
926 }
927 vcc->channo = dev->channo;
928 dev->channo &= dev->channel_mask;
929
930 } else {
931 vcc->channo = (vpi << FS155_VCI_BITS) | (vci);
932 if (((DO_DIRECTION(rxtp) && dev->atm_vccs[vcc->channo])) ||
933 ( DO_DIRECTION(txtp) && test_bit (vcc->channo, dev->tx_inuse))) {
934 printk ("Channel is in use for FS155.\n");
935 return -EBUSY;
936 }
937 }
938 fs_dprintk (FS_DEBUG_OPEN, "OK. Allocated channel %x(%d).\n",
939 vcc->channo, vcc->channo);
940 }
941
942 if (DO_DIRECTION (txtp)) {
943 tc = kmalloc (sizeof (struct fs_transmit_config), GFP_KERNEL);
944 fs_dprintk (FS_DEBUG_ALLOC, "Alloc tc: %p(%Zd)\n",
945 tc, sizeof (struct fs_transmit_config));
946 if (!tc) {
947 fs_dprintk (FS_DEBUG_OPEN, "fs: can't alloc transmit_config.\n");
948 return -ENOMEM;
949 }
950
951 /* Allocate the "open" entry from the high priority txq. This makes
952 it most likely that the chip will notice it. It also prevents us
953 from having to wait for completion. On the other hand, we may
954 need to wait for completion anyway, to see if it completed
955 successfully. */
956
957 switch (atm_vcc->qos.aal) {
958 case ATM_AAL2:
959 case ATM_AAL0:
960 tc->flags = 0
961 | TC_FLAGS_TRANSPARENT_PAYLOAD
962 | TC_FLAGS_PACKET
963 | (1 << 28)
964 | TC_FLAGS_TYPE_UBR /* XXX Change to VBR -- PVDL */
965 | TC_FLAGS_CAL0;
966 break;
967 case ATM_AAL5:
968 tc->flags = 0
969 | TC_FLAGS_AAL5
970 | TC_FLAGS_PACKET /* ??? */
971 | TC_FLAGS_TYPE_CBR
972 | TC_FLAGS_CAL0;
973 break;
974 default:
975 printk ("Unknown aal: %d\n", atm_vcc->qos.aal);
976 tc->flags = 0;
977 }
978 /* Docs are vague about this atm_hdr field. By the way, the FS
979 * chip makes odd errors if lower bits are set.... -- REW */
980 tc->atm_hdr = (vpi << 20) | (vci << 4);
981 tmc0 = 0;
982 {
983 int pcr = atm_pcr_goal (txtp);
984
985 fs_dprintk (FS_DEBUG_OPEN, "pcr = %d.\n", pcr);
986
987 /* XXX Hmm. officially we're only allowed to do this if rounding
988 is round_down -- REW */
989 if (IS_FS50(dev)) {
990 if (pcr > 51840000/53/8) pcr = 51840000/53/8;
991 } else {
992 if (pcr > 155520000/53/8) pcr = 155520000/53/8;
993 }
994 if (!pcr) {
995 /* no rate cap */
996 tmc0 = IS_FS50(dev)?0x61BE:0x64c9; /* Just copied over the bits from Fujitsu -- REW */
997 } else {
998 int r;
999 if (pcr < 0) {
1000 r = ROUND_DOWN;
1001 pcr = -pcr;
1002 } else {
1003 r = ROUND_UP;
1004 }
1005 error = make_rate (pcr, r, &tmc0, NULL);
1006 if (error) {
1007 kfree(tc);
1008 return error;
1009 }
1010 }
1011 fs_dprintk (FS_DEBUG_OPEN, "pcr = %d.\n", pcr);
1012 }
1013
1014 tc->TMC[0] = tmc0 | 0x4000;
1015 tc->TMC[1] = 0; /* Unused */
1016 tc->TMC[2] = 0; /* Unused */
1017 tc->TMC[3] = 0; /* Unused */
1018
1019 tc->spec = 0; /* UTOPIA address, UDF, HEC: Unused -> 0 */
1020 tc->rtag[0] = 0; /* What should I do with routing tags???
1021 -- Not used -- AS -- Thanks -- REW*/
1022 tc->rtag[1] = 0;
1023 tc->rtag[2] = 0;
1024
1025 if (fs_debug & FS_DEBUG_OPEN) {
1026 fs_dprintk (FS_DEBUG_OPEN, "TX config record:\n");
1027 my_hd (tc, sizeof (*tc));
1028 }
1029
1030 /* We now use the "submit_command" function to submit commands to
1031 the firestream. There is a define up near the definition of
1032 that routine that switches this routine between immediate write
1033 to the immediate comamnd registers and queuing the commands in
1034 the HPTXQ for execution. This last technique might be more
1035 efficient if we know we're going to submit a whole lot of
1036 commands in one go, but this driver is not setup to be able to
1037 use such a construct. So it probably doen't matter much right
1038 now. -- REW */
1039
1040 /* The command is IMMediate and INQueue. The parameters are out-of-line.. */
1041 submit_command (dev, &dev->hp_txq,
1042 QE_CMD_CONFIG_TX | QE_CMD_IMM_INQ | vcc->channo,
1043 virt_to_bus (tc), 0, 0);
1044
1045 submit_command (dev, &dev->hp_txq,
1046 QE_CMD_TX_EN | QE_CMD_IMM_INQ | vcc->channo,
1047 0, 0, 0);
1048 set_bit (vcc->channo, dev->tx_inuse);
1049 }
1050
1051 if (DO_DIRECTION (rxtp)) {
1052 dev->atm_vccs[vcc->channo] = atm_vcc;
1053
1054 for (bfp = 0;bfp < FS_NR_FREE_POOLS; bfp++)
1055 if (atm_vcc->qos.rxtp.max_sdu <= dev->rx_fp[bfp].bufsize) break;
1056 if (bfp >= FS_NR_FREE_POOLS) {
1057 fs_dprintk (FS_DEBUG_OPEN, "No free pool fits sdu: %d.\n",
1058 atm_vcc->qos.rxtp.max_sdu);
1059 /* XXX Cleanup? -- Would just calling fs_close work??? -- REW */
1060
1061 /* XXX clear tx inuse. Close TX part? */
1062 dev->atm_vccs[vcc->channo] = NULL;
1063 kfree (vcc);
1064 return -EINVAL;
1065 }
1066
1067 switch (atm_vcc->qos.aal) {
1068 case ATM_AAL0:
1069 case ATM_AAL2:
1070 submit_command (dev, &dev->hp_txq,
1071 QE_CMD_CONFIG_RX | QE_CMD_IMM_INQ | vcc->channo,
1072 RC_FLAGS_TRANSP |
1073 RC_FLAGS_BFPS_BFP * bfp |
1074 RC_FLAGS_RXBM_PSB, 0, 0);
1075 break;
1076 case ATM_AAL5:
1077 submit_command (dev, &dev->hp_txq,
1078 QE_CMD_CONFIG_RX | QE_CMD_IMM_INQ | vcc->channo,
1079 RC_FLAGS_AAL5 |
1080 RC_FLAGS_BFPS_BFP * bfp |
1081 RC_FLAGS_RXBM_PSB, 0, 0);
1082 break;
1083 };
1084 if (IS_FS50 (dev)) {
1085 submit_command (dev, &dev->hp_txq,
1086 QE_CMD_REG_WR | QE_CMD_IMM_INQ,
1087 0x80 + vcc->channo,
1088 (vpi << 16) | vci, 0 ); /* XXX -- Use defines. */
1089 }
1090 submit_command (dev, &dev->hp_txq,
1091 QE_CMD_RX_EN | QE_CMD_IMM_INQ | vcc->channo,
1092 0, 0, 0);
1093 }
1094
1095 /* Indicate we're done! */
1096 set_bit(ATM_VF_READY, &atm_vcc->flags);
1097
1098 func_exit ();
1099 return 0;
1100 }
1101
1102
1103 static void fs_close(struct atm_vcc *atm_vcc)
1104 {
1105 struct fs_dev *dev = FS_DEV (atm_vcc->dev);
1106 struct fs_vcc *vcc = FS_VCC (atm_vcc);
1107 struct atm_trafprm * txtp;
1108 struct atm_trafprm * rxtp;
1109
1110 func_enter ();
1111
1112 clear_bit(ATM_VF_READY, &atm_vcc->flags);
1113
1114 fs_dprintk (FS_DEBUG_QSIZE, "--==**[%d]**==--", dev->ntxpckts);
1115 if (vcc->last_skb) {
1116 fs_dprintk (FS_DEBUG_QUEUE, "Waiting for skb %p to be sent.\n",
1117 vcc->last_skb);
1118 /* We're going to wait for the last packet to get sent on this VC. It would
1119 be impolite not to send them don't you think?
1120 XXX
1121 We don't know which packets didn't get sent. So if we get interrupted in
1122 this sleep_on, we'll lose any reference to these packets. Memory leak!
1123 On the other hand, it's awfully convenient that we can abort a "close" that
1124 is taking too long. Maybe just use non-interruptible sleep on? -- REW */
1125 interruptible_sleep_on (& vcc->close_wait);
1126 }
1127
1128 txtp = &atm_vcc->qos.txtp;
1129 rxtp = &atm_vcc->qos.rxtp;
1130
1131
1132 /* See App note XXX (Unpublished as of now) for the reason for the
1133 removal of the "CMD_IMM_INQ" part of the TX_PURGE_INH... -- REW */
1134
1135 if (DO_DIRECTION (txtp)) {
1136 submit_command (dev, &dev->hp_txq,
1137 QE_CMD_TX_PURGE_INH | /*QE_CMD_IMM_INQ|*/ vcc->channo, 0,0,0);
1138 clear_bit (vcc->channo, dev->tx_inuse);
1139 }
1140
1141 if (DO_DIRECTION (rxtp)) {
1142 submit_command (dev, &dev->hp_txq,
1143 QE_CMD_RX_PURGE_INH | QE_CMD_IMM_INQ | vcc->channo, 0,0,0);
1144 dev->atm_vccs [vcc->channo] = NULL;
1145
1146 /* This means that this is configured as a receive channel */
1147 if (IS_FS50 (dev)) {
1148 /* Disable the receive filter. Is 0/0 indeed an invalid receive
1149 channel? -- REW. Yes it is. -- Hang. Ok. I'll use -1
1150 (0xfff...) -- REW */
1151 submit_command (dev, &dev->hp_txq,
1152 QE_CMD_REG_WR | QE_CMD_IMM_INQ,
1153 0x80 + vcc->channo, -1, 0 );
1154 }
1155 }
1156
1157 fs_dprintk (FS_DEBUG_ALLOC, "Free vcc: %p\n", vcc);
1158 kfree (vcc);
1159
1160 func_exit ();
1161 }
1162
1163
1164 static int fs_send (struct atm_vcc *atm_vcc, struct sk_buff *skb)
1165 {
1166 struct fs_dev *dev = FS_DEV (atm_vcc->dev);
1167 struct fs_vcc *vcc = FS_VCC (atm_vcc);
1168 struct FS_BPENTRY *td;
1169
1170 func_enter ();
1171
1172 fs_dprintk (FS_DEBUG_TXMEM, "I");
1173 fs_dprintk (FS_DEBUG_SEND, "Send: atm_vcc %p skb %p vcc %p dev %p\n",
1174 atm_vcc, skb, vcc, dev);
1175
1176 fs_dprintk (FS_DEBUG_ALLOC, "Alloc t-skb: %p (atm_send)\n", skb);
1177
1178 ATM_SKB(skb)->vcc = atm_vcc;
1179
1180 vcc->last_skb = skb;
1181
1182 td = kmalloc (sizeof (struct FS_BPENTRY), GFP_ATOMIC);
1183 fs_dprintk (FS_DEBUG_ALLOC, "Alloc transd: %p(%Zd)\n", td, sizeof (struct FS_BPENTRY));
1184 if (!td) {
1185 /* Oops out of mem */
1186 return -ENOMEM;
1187 }
1188
1189 fs_dprintk (FS_DEBUG_SEND, "first word in buffer: %x\n",
1190 *(int *) skb->data);
1191
1192 td->flags = TD_EPI | TD_DATA | skb->len;
1193 td->next = 0;
1194 td->bsa = virt_to_bus (skb->data);
1195 td->skb = skb;
1196 td->dev = dev;
1197 dev->ntxpckts++;
1198
1199 #ifdef DEBUG_EXTRA
1200 da[qd] = td;
1201 dq[qd].flags = td->flags;
1202 dq[qd].next = td->next;
1203 dq[qd].bsa = td->bsa;
1204 dq[qd].skb = td->skb;
1205 dq[qd].dev = td->dev;
1206 qd++;
1207 if (qd >= 60) qd = 0;
1208 #endif
1209
1210 submit_queue (dev, &dev->hp_txq,
1211 QE_TRANSMIT_DE | vcc->channo,
1212 virt_to_bus (td), 0,
1213 virt_to_bus (td));
1214
1215 fs_dprintk (FS_DEBUG_QUEUE, "in send: txq %d txrq %d\n",
1216 read_fs (dev, Q_EA (dev->hp_txq.offset)) -
1217 read_fs (dev, Q_SA (dev->hp_txq.offset)),
1218 read_fs (dev, Q_EA (dev->tx_relq.offset)) -
1219 read_fs (dev, Q_SA (dev->tx_relq.offset)));
1220
1221 func_exit ();
1222 return 0;
1223 }
1224
1225
1226 /* Some function placeholders for functions we don't yet support. */
1227
1228 #if 0
1229 static int fs_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
1230 {
1231 func_enter ();
1232 func_exit ();
1233 return -ENOIOCTLCMD;
1234 }
1235
1236
1237 static int fs_getsockopt(struct atm_vcc *vcc,int level,int optname,
1238 void __user *optval,int optlen)
1239 {
1240 func_enter ();
1241 func_exit ();
1242 return 0;
1243 }
1244
1245
1246 static int fs_setsockopt(struct atm_vcc *vcc,int level,int optname,
1247 void __user *optval,int optlen)
1248 {
1249 func_enter ();
1250 func_exit ();
1251 return 0;
1252 }
1253
1254
1255 static void fs_phy_put(struct atm_dev *dev,unsigned char value,
1256 unsigned long addr)
1257 {
1258 func_enter ();
1259 func_exit ();
1260 }
1261
1262
1263 static unsigned char fs_phy_get(struct atm_dev *dev,unsigned long addr)
1264 {
1265 func_enter ();
1266 func_exit ();
1267 return 0;
1268 }
1269
1270
1271 static int fs_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flags)
1272 {
1273 func_enter ();
1274 func_exit ();
1275 return 0;
1276 };
1277
1278 #endif
1279
1280
1281 static const struct atmdev_ops ops = {
1282 .open = fs_open,
1283 .close = fs_close,
1284 .send = fs_send,
1285 .owner = THIS_MODULE,
1286 /* ioctl: fs_ioctl, */
1287 /* getsockopt: fs_getsockopt, */
1288 /* setsockopt: fs_setsockopt, */
1289 /* change_qos: fs_change_qos, */
1290
1291 /* For now implement these internally here... */
1292 /* phy_put: fs_phy_put, */
1293 /* phy_get: fs_phy_get, */
1294 };
1295
1296
1297 static void __devinit undocumented_pci_fix (struct pci_dev *pdev)
1298 {
1299 u32 tint;
1300
1301 /* The Windows driver says: */
1302 /* Switch off FireStream Retry Limit Threshold
1303 */
1304
1305 /* The register at 0x28 is documented as "reserved", no further
1306 comments. */
1307
1308 pci_read_config_dword (pdev, 0x28, &tint);
1309 if (tint != 0x80) {
1310 tint = 0x80;
1311 pci_write_config_dword (pdev, 0x28, tint);
1312 }
1313 }
1314
1315
1316
1317 /**************************************************************************
1318 * PHY routines *
1319 **************************************************************************/
1320
1321 static void __devinit write_phy (struct fs_dev *dev, int regnum, int val)
1322 {
1323 submit_command (dev, &dev->hp_txq, QE_CMD_PRP_WR | QE_CMD_IMM_INQ,
1324 regnum, val, 0);
1325 }
1326
1327 static int __devinit init_phy (struct fs_dev *dev, struct reginit_item *reginit)
1328 {
1329 int i;
1330
1331 func_enter ();
1332 while (reginit->reg != PHY_EOF) {
1333 if (reginit->reg == PHY_CLEARALL) {
1334 /* "PHY_CLEARALL means clear all registers. Numregisters is in "val". */
1335 for (i=0;i<reginit->val;i++) {
1336 write_phy (dev, i, 0);
1337 }
1338 } else {
1339 write_phy (dev, reginit->reg, reginit->val);
1340 }
1341 reginit++;
1342 }
1343 func_exit ();
1344 return 0;
1345 }
1346
1347 static void reset_chip (struct fs_dev *dev)
1348 {
1349 int i;
1350
1351 write_fs (dev, SARMODE0, SARMODE0_SRTS0);
1352
1353 /* Undocumented delay */
1354 udelay (128);
1355
1356 /* The "internal registers are documented to all reset to zero, but
1357 comments & code in the Windows driver indicates that the pools are
1358 NOT reset. */
1359 for (i=0;i < FS_NR_FREE_POOLS;i++) {
1360 write_fs (dev, FP_CNF (RXB_FP(i)), 0);
1361 write_fs (dev, FP_SA (RXB_FP(i)), 0);
1362 write_fs (dev, FP_EA (RXB_FP(i)), 0);
1363 write_fs (dev, FP_CNT (RXB_FP(i)), 0);
1364 write_fs (dev, FP_CTU (RXB_FP(i)), 0);
1365 }
1366
1367 /* The same goes for the match channel registers, although those are
1368 NOT documented that way in the Windows driver. -- REW */
1369 /* The Windows driver DOES write 0 to these registers somewhere in
1370 the init sequence. However, a small hardware-feature, will
1371 prevent reception of data on VPI/VCI = 0/0 (Unless the channel
1372 allocated happens to have no disabled channels that have a lower
1373 number. -- REW */
1374
1375 /* Clear the match channel registers. */
1376 if (IS_FS50 (dev)) {
1377 for (i=0;i<FS50_NR_CHANNELS;i++) {
1378 write_fs (dev, 0x200 + i * 4, -1);
1379 }
1380 }
1381 }
1382
1383 static void __devinit *aligned_kmalloc (int size, gfp_t flags, int alignment)
1384 {
1385 void *t;
1386
1387 if (alignment <= 0x10) {
1388 t = kmalloc (size, flags);
1389 if ((unsigned long)t & (alignment-1)) {
1390 printk ("Kmalloc doesn't align things correctly! %p\n", t);
1391 kfree (t);
1392 return aligned_kmalloc (size, flags, alignment * 4);
1393 }
1394 return t;
1395 }
1396 printk (KERN_ERR "Request for > 0x10 alignment not yet implemented (hard!)\n");
1397 return NULL;
1398 }
1399
1400 static int __devinit init_q (struct fs_dev *dev,
1401 struct queue *txq, int queue, int nentries, int is_rq)
1402 {
1403 int sz = nentries * sizeof (struct FS_QENTRY);
1404 struct FS_QENTRY *p;
1405
1406 func_enter ();
1407
1408 fs_dprintk (FS_DEBUG_INIT, "Inititing queue at %x: %d entries:\n",
1409 queue, nentries);
1410
1411 p = aligned_kmalloc (sz, GFP_KERNEL, 0x10);
1412 fs_dprintk (FS_DEBUG_ALLOC, "Alloc queue: %p(%d)\n", p, sz);
1413
1414 if (!p) return 0;
1415
1416 write_fs (dev, Q_SA(queue), virt_to_bus(p));
1417 write_fs (dev, Q_EA(queue), virt_to_bus(p+nentries-1));
1418 write_fs (dev, Q_WP(queue), virt_to_bus(p));
1419 write_fs (dev, Q_RP(queue), virt_to_bus(p));
1420 if (is_rq) {
1421 /* Configuration for the receive queue: 0: interrupt immediately,
1422 no pre-warning to empty queues: We do our best to keep the
1423 queue filled anyway. */
1424 write_fs (dev, Q_CNF(queue), 0 );
1425 }
1426
1427 txq->sa = p;
1428 txq->ea = p;
1429 txq->offset = queue;
1430
1431 func_exit ();
1432 return 1;
1433 }
1434
1435
1436 static int __devinit init_fp (struct fs_dev *dev,
1437 struct freepool *fp, int queue, int bufsize, int nr_buffers)
1438 {
1439 func_enter ();
1440
1441 fs_dprintk (FS_DEBUG_INIT, "Inititing free pool at %x:\n", queue);
1442
1443 write_fs (dev, FP_CNF(queue), (bufsize * RBFP_RBS) | RBFP_RBSVAL | RBFP_CME);
1444 write_fs (dev, FP_SA(queue), 0);
1445 write_fs (dev, FP_EA(queue), 0);
1446 write_fs (dev, FP_CTU(queue), 0);
1447 write_fs (dev, FP_CNT(queue), 0);
1448
1449 fp->offset = queue;
1450 fp->bufsize = bufsize;
1451 fp->nr_buffers = nr_buffers;
1452
1453 func_exit ();
1454 return 1;
1455 }
1456
1457
1458 static inline int nr_buffers_in_freepool (struct fs_dev *dev, struct freepool *fp)
1459 {
1460 #if 0
1461 /* This seems to be unreliable.... */
1462 return read_fs (dev, FP_CNT (fp->offset));
1463 #else
1464 return fp->n;
1465 #endif
1466 }
1467
1468
1469 /* Check if this gets going again if a pool ever runs out. -- Yes, it
1470 does. I've seen "receive abort: no buffers" and things started
1471 working again after that... -- REW */
1472
1473 static void top_off_fp (struct fs_dev *dev, struct freepool *fp,
1474 gfp_t gfp_flags)
1475 {
1476 struct FS_BPENTRY *qe, *ne;
1477 struct sk_buff *skb;
1478 int n = 0;
1479 u32 qe_tmp;
1480
1481 fs_dprintk (FS_DEBUG_QUEUE, "Topping off queue at %x (%d-%d/%d)\n",
1482 fp->offset, read_fs (dev, FP_CNT (fp->offset)), fp->n,
1483 fp->nr_buffers);
1484 while (nr_buffers_in_freepool(dev, fp) < fp->nr_buffers) {
1485
1486 skb = alloc_skb (fp->bufsize, gfp_flags);
1487 fs_dprintk (FS_DEBUG_ALLOC, "Alloc rec-skb: %p(%d)\n", skb, fp->bufsize);
1488 if (!skb) break;
1489 ne = kmalloc (sizeof (struct FS_BPENTRY), gfp_flags);
1490 fs_dprintk (FS_DEBUG_ALLOC, "Alloc rec-d: %p(%Zd)\n", ne, sizeof (struct FS_BPENTRY));
1491 if (!ne) {
1492 fs_dprintk (FS_DEBUG_ALLOC, "Free rec-skb: %p\n", skb);
1493 dev_kfree_skb_any (skb);
1494 break;
1495 }
1496
1497 fs_dprintk (FS_DEBUG_QUEUE, "Adding skb %p desc %p -> %p(%p) ",
1498 skb, ne, skb->data, skb->head);
1499 n++;
1500 ne->flags = FP_FLAGS_EPI | fp->bufsize;
1501 ne->next = virt_to_bus (NULL);
1502 ne->bsa = virt_to_bus (skb->data);
1503 ne->aal_bufsize = fp->bufsize;
1504 ne->skb = skb;
1505 ne->fp = fp;
1506
1507 /*
1508 * FIXME: following code encodes and decodes
1509 * machine pointers (could be 64-bit) into a
1510 * 32-bit register.
1511 */
1512
1513 qe_tmp = read_fs (dev, FP_EA(fp->offset));
1514 fs_dprintk (FS_DEBUG_QUEUE, "link at %x\n", qe_tmp);
1515 if (qe_tmp) {
1516 qe = bus_to_virt ((long) qe_tmp);
1517 qe->next = virt_to_bus(ne);
1518 qe->flags &= ~FP_FLAGS_EPI;
1519 } else
1520 write_fs (dev, FP_SA(fp->offset), virt_to_bus(ne));
1521
1522 write_fs (dev, FP_EA(fp->offset), virt_to_bus (ne));
1523 fp->n++; /* XXX Atomic_inc? */
1524 write_fs (dev, FP_CTU(fp->offset), 1);
1525 }
1526
1527 fs_dprintk (FS_DEBUG_QUEUE, "Added %d entries. \n", n);
1528 }
1529
1530 static void __devexit free_queue (struct fs_dev *dev, struct queue *txq)
1531 {
1532 func_enter ();
1533
1534 write_fs (dev, Q_SA(txq->offset), 0);
1535 write_fs (dev, Q_EA(txq->offset), 0);
1536 write_fs (dev, Q_RP(txq->offset), 0);
1537 write_fs (dev, Q_WP(txq->offset), 0);
1538 /* Configuration ? */
1539
1540 fs_dprintk (FS_DEBUG_ALLOC, "Free queue: %p\n", txq->sa);
1541 kfree (txq->sa);
1542
1543 func_exit ();
1544 }
1545
1546 static void __devexit free_freepool (struct fs_dev *dev, struct freepool *fp)
1547 {
1548 func_enter ();
1549
1550 write_fs (dev, FP_CNF(fp->offset), 0);
1551 write_fs (dev, FP_SA (fp->offset), 0);
1552 write_fs (dev, FP_EA (fp->offset), 0);
1553 write_fs (dev, FP_CNT(fp->offset), 0);
1554 write_fs (dev, FP_CTU(fp->offset), 0);
1555
1556 func_exit ();
1557 }
1558
1559
1560
1561 static irqreturn_t fs_irq (int irq, void *dev_id)
1562 {
1563 int i;
1564 u32 status;
1565 struct fs_dev *dev = dev_id;
1566
1567 status = read_fs (dev, ISR);
1568 if (!status)
1569 return IRQ_NONE;
1570
1571 func_enter ();
1572
1573 #ifdef IRQ_RATE_LIMIT
1574 /* Aaargh! I'm ashamed. This costs more lines-of-code than the actual
1575 interrupt routine!. (Well, used to when I wrote that comment) -- REW */
1576 {
1577 static int lastjif;
1578 static int nintr=0;
1579
1580 if (lastjif == jiffies) {
1581 if (++nintr > IRQ_RATE_LIMIT) {
1582 free_irq (dev->irq, dev_id);
1583 printk (KERN_ERR "fs: Too many interrupts. Turning off interrupt %d.\n",
1584 dev->irq);
1585 }
1586 } else {
1587 lastjif = jiffies;
1588 nintr = 0;
1589 }
1590 }
1591 #endif
1592 fs_dprintk (FS_DEBUG_QUEUE, "in intr: txq %d txrq %d\n",
1593 read_fs (dev, Q_EA (dev->hp_txq.offset)) -
1594 read_fs (dev, Q_SA (dev->hp_txq.offset)),
1595 read_fs (dev, Q_EA (dev->tx_relq.offset)) -
1596 read_fs (dev, Q_SA (dev->tx_relq.offset)));
1597
1598 /* print the bits in the ISR register. */
1599 if (fs_debug & FS_DEBUG_IRQ) {
1600 /* The FS_DEBUG things are unnecessary here. But this way it is
1601 clear for grep that these are debug prints. */
1602 fs_dprintk (FS_DEBUG_IRQ, "IRQ status:");
1603 for (i=0;i<27;i++)
1604 if (status & (1 << i))
1605 fs_dprintk (FS_DEBUG_IRQ, " %s", irq_bitname[i]);
1606 fs_dprintk (FS_DEBUG_IRQ, "\n");
1607 }
1608
1609 if (status & ISR_RBRQ0_W) {
1610 fs_dprintk (FS_DEBUG_IRQ, "Iiiin-coming (0)!!!!\n");
1611 process_incoming (dev, &dev->rx_rq[0]);
1612 /* items mentioned on RBRQ0 are from FP 0 or 1. */
1613 top_off_fp (dev, &dev->rx_fp[0], GFP_ATOMIC);
1614 top_off_fp (dev, &dev->rx_fp[1], GFP_ATOMIC);
1615 }
1616
1617 if (status & ISR_RBRQ1_W) {
1618 fs_dprintk (FS_DEBUG_IRQ, "Iiiin-coming (1)!!!!\n");
1619 process_incoming (dev, &dev->rx_rq[1]);
1620 top_off_fp (dev, &dev->rx_fp[2], GFP_ATOMIC);
1621 top_off_fp (dev, &dev->rx_fp[3], GFP_ATOMIC);
1622 }
1623
1624 if (status & ISR_RBRQ2_W) {
1625 fs_dprintk (FS_DEBUG_IRQ, "Iiiin-coming (2)!!!!\n");
1626 process_incoming (dev, &dev->rx_rq[2]);
1627 top_off_fp (dev, &dev->rx_fp[4], GFP_ATOMIC);
1628 top_off_fp (dev, &dev->rx_fp[5], GFP_ATOMIC);
1629 }
1630
1631 if (status & ISR_RBRQ3_W) {
1632 fs_dprintk (FS_DEBUG_IRQ, "Iiiin-coming (3)!!!!\n");
1633 process_incoming (dev, &dev->rx_rq[3]);
1634 top_off_fp (dev, &dev->rx_fp[6], GFP_ATOMIC);
1635 top_off_fp (dev, &dev->rx_fp[7], GFP_ATOMIC);
1636 }
1637
1638 if (status & ISR_CSQ_W) {
1639 fs_dprintk (FS_DEBUG_IRQ, "Command executed ok!\n");
1640 process_return_queue (dev, &dev->st_q);
1641 }
1642
1643 if (status & ISR_TBRQ_W) {
1644 fs_dprintk (FS_DEBUG_IRQ, "Data tramsitted!\n");
1645 process_txdone_queue (dev, &dev->tx_relq);
1646 }
1647
1648 func_exit ();
1649 return IRQ_HANDLED;
1650 }
1651
1652
1653 #ifdef FS_POLL_FREQ
1654 static void fs_poll (unsigned long data)
1655 {
1656 struct fs_dev *dev = (struct fs_dev *) data;
1657
1658 fs_irq (0, dev);
1659 dev->timer.expires = jiffies + FS_POLL_FREQ;
1660 add_timer (&dev->timer);
1661 }
1662 #endif
1663
1664 static int __devinit fs_init (struct fs_dev *dev)
1665 {
1666 struct pci_dev *pci_dev;
1667 int isr, to;
1668 int i;
1669
1670 func_enter ();
1671 pci_dev = dev->pci_dev;
1672
1673 printk (KERN_INFO "found a FireStream %d card, base %16llx, irq%d.\n",
1674 IS_FS50(dev)?50:155,
1675 (unsigned long long)pci_resource_start(pci_dev, 0),
1676 dev->pci_dev->irq);
1677
1678 if (fs_debug & FS_DEBUG_INIT)
1679 my_hd ((unsigned char *) dev, sizeof (*dev));
1680
1681 undocumented_pci_fix (pci_dev);
1682
1683 dev->hw_base = pci_resource_start(pci_dev, 0);
1684
1685 dev->base = ioremap(dev->hw_base, 0x1000);
1686
1687 reset_chip (dev);
1688
1689 write_fs (dev, SARMODE0, 0
1690 | (0 * SARMODE0_SHADEN) /* We don't use shadow registers. */
1691 | (1 * SARMODE0_INTMODE_READCLEAR)
1692 | (1 * SARMODE0_CWRE)
1693 | (IS_FS50(dev) ? SARMODE0_PRPWT_FS50_5:
1694 SARMODE0_PRPWT_FS155_3)
1695 | (1 * SARMODE0_CALSUP_1)
1696 | (IS_FS50(dev) ? (0
1697 | SARMODE0_RXVCS_32
1698 | SARMODE0_ABRVCS_32
1699 | SARMODE0_TXVCS_32):
1700 (0
1701 | SARMODE0_RXVCS_1k
1702 | SARMODE0_ABRVCS_1k
1703 | SARMODE0_TXVCS_1k)));
1704
1705 /* 10ms * 100 is 1 second. That should be enough, as AN3:9 says it takes
1706 1ms. */
1707 to = 100;
1708 while (--to) {
1709 isr = read_fs (dev, ISR);
1710
1711 /* This bit is documented as "RESERVED" */
1712 if (isr & ISR_INIT_ERR) {
1713 printk (KERN_ERR "Error initializing the FS... \n");
1714 goto unmap;
1715 }
1716 if (isr & ISR_INIT) {
1717 fs_dprintk (FS_DEBUG_INIT, "Ha! Initialized OK!\n");
1718 break;
1719 }
1720
1721 /* Try again after 10ms. */
1722 msleep(10);
1723 }
1724
1725 if (!to) {
1726 printk (KERN_ERR "timeout initializing the FS... \n");
1727 goto unmap;
1728 }
1729
1730 /* XXX fix for fs155 */
1731 dev->channel_mask = 0x1f;
1732 dev->channo = 0;
1733
1734 /* AN3: 10 */
1735 write_fs (dev, SARMODE1, 0
1736 | (fs_keystream * SARMODE1_DEFHEC) /* XXX PHY */
1737 | ((loopback == 1) * SARMODE1_TSTLP) /* XXX Loopback mode enable... */
1738 | (1 * SARMODE1_DCRM)
1739 | (1 * SARMODE1_DCOAM)
1740 | (0 * SARMODE1_OAMCRC)
1741 | (0 * SARMODE1_DUMPE)
1742 | (0 * SARMODE1_GPLEN)
1743 | (0 * SARMODE1_GNAM)
1744 | (0 * SARMODE1_GVAS)
1745 | (0 * SARMODE1_GPAS)
1746 | (1 * SARMODE1_GPRI)
1747 | (0 * SARMODE1_PMS)
1748 | (0 * SARMODE1_GFCR)
1749 | (1 * SARMODE1_HECM2)
1750 | (1 * SARMODE1_HECM1)
1751 | (1 * SARMODE1_HECM0)
1752 | (1 << 12) /* That's what hang's driver does. Program to 0 */
1753 | (0 * 0xff) /* XXX FS155 */);
1754
1755
1756 /* Cal prescale etc */
1757
1758 /* AN3: 11 */
1759 write_fs (dev, TMCONF, 0x0000000f);
1760 write_fs (dev, CALPRESCALE, 0x01010101 * num);
1761 write_fs (dev, 0x80, 0x000F00E4);
1762
1763 /* AN3: 12 */
1764 write_fs (dev, CELLOSCONF, 0
1765 | ( 0 * CELLOSCONF_CEN)
1766 | ( CELLOSCONF_SC1)
1767 | (0x80 * CELLOSCONF_COBS)
1768 | (num * CELLOSCONF_COPK) /* Changed from 0xff to 0x5a */
1769 | (num * CELLOSCONF_COST));/* after a hint from Hang.
1770 * performance jumped 50->70... */
1771
1772 /* Magic value by Hang */
1773 write_fs (dev, CELLOSCONF_COST, 0x0B809191);
1774
1775 if (IS_FS50 (dev)) {
1776 write_fs (dev, RAS0, RAS0_DCD_XHLT);
1777 dev->atm_dev->ci_range.vpi_bits = 12;
1778 dev->atm_dev->ci_range.vci_bits = 16;
1779 dev->nchannels = FS50_NR_CHANNELS;
1780 } else {
1781 write_fs (dev, RAS0, RAS0_DCD_XHLT
1782 | (((1 << FS155_VPI_BITS) - 1) * RAS0_VPSEL)
1783 | (((1 << FS155_VCI_BITS) - 1) * RAS0_VCSEL));
1784 /* We can chose the split arbitarily. We might be able to
1785 support more. Whatever. This should do for now. */
1786 dev->atm_dev->ci_range.vpi_bits = FS155_VPI_BITS;
1787 dev->atm_dev->ci_range.vci_bits = FS155_VCI_BITS;
1788
1789 /* Address bits we can't use should be compared to 0. */
1790 write_fs (dev, RAC, 0);
1791
1792 /* Manual (AN9, page 6) says ASF1=0 means compare Utopia address
1793 * too. I can't find ASF1 anywhere. Anyway, we AND with just the
1794 * other bits, then compare with 0, which is exactly what we
1795 * want. */
1796 write_fs (dev, RAM, (1 << (28 - FS155_VPI_BITS - FS155_VCI_BITS)) - 1);
1797 dev->nchannels = FS155_NR_CHANNELS;
1798 }
1799 dev->atm_vccs = kcalloc (dev->nchannels, sizeof (struct atm_vcc *),
1800 GFP_KERNEL);
1801 fs_dprintk (FS_DEBUG_ALLOC, "Alloc atmvccs: %p(%Zd)\n",
1802 dev->atm_vccs, dev->nchannels * sizeof (struct atm_vcc *));
1803
1804 if (!dev->atm_vccs) {
1805 printk (KERN_WARNING "Couldn't allocate memory for VCC buffers. Woops!\n");
1806 /* XXX Clean up..... */
1807 goto unmap;
1808 }
1809
1810 dev->tx_inuse = kzalloc (dev->nchannels / 8 /* bits/byte */ , GFP_KERNEL);
1811 fs_dprintk (FS_DEBUG_ALLOC, "Alloc tx_inuse: %p(%d)\n",
1812 dev->atm_vccs, dev->nchannels / 8);
1813
1814 if (!dev->tx_inuse) {
1815 printk (KERN_WARNING "Couldn't allocate memory for tx_inuse bits!\n");
1816 /* XXX Clean up..... */
1817 goto unmap;
1818 }
1819 /* -- RAS1 : FS155 and 50 differ. Default (0) should be OK for both */
1820 /* -- RAS2 : FS50 only: Default is OK. */
1821
1822 /* DMAMODE, default should be OK. -- REW */
1823 write_fs (dev, DMAMR, DMAMR_TX_MODE_FULL);
1824
1825 init_q (dev, &dev->hp_txq, TX_PQ(TXQ_HP), TXQ_NENTRIES, 0);
1826 init_q (dev, &dev->lp_txq, TX_PQ(TXQ_LP), TXQ_NENTRIES, 0);
1827 init_q (dev, &dev->tx_relq, TXB_RQ, TXQ_NENTRIES, 1);
1828 init_q (dev, &dev->st_q, ST_Q, TXQ_NENTRIES, 1);
1829
1830 for (i=0;i < FS_NR_FREE_POOLS;i++) {
1831 init_fp (dev, &dev->rx_fp[i], RXB_FP(i),
1832 rx_buf_sizes[i], rx_pool_sizes[i]);
1833 top_off_fp (dev, &dev->rx_fp[i], GFP_KERNEL);
1834 }
1835
1836
1837 for (i=0;i < FS_NR_RX_QUEUES;i++)
1838 init_q (dev, &dev->rx_rq[i], RXB_RQ(i), RXRQ_NENTRIES, 1);
1839
1840 dev->irq = pci_dev->irq;
1841 if (request_irq (dev->irq, fs_irq, IRQF_SHARED, "firestream", dev)) {
1842 printk (KERN_WARNING "couldn't get irq %d for firestream.\n", pci_dev->irq);
1843 /* XXX undo all previous stuff... */
1844 goto unmap;
1845 }
1846 fs_dprintk (FS_DEBUG_INIT, "Grabbed irq %d for dev at %p.\n", dev->irq, dev);
1847
1848 /* We want to be notified of most things. Just the statistics count
1849 overflows are not interesting */
1850 write_fs (dev, IMR, 0
1851 | ISR_RBRQ0_W
1852 | ISR_RBRQ1_W
1853 | ISR_RBRQ2_W
1854 | ISR_RBRQ3_W
1855 | ISR_TBRQ_W
1856 | ISR_CSQ_W);
1857
1858 write_fs (dev, SARMODE0, 0
1859 | (0 * SARMODE0_SHADEN) /* We don't use shadow registers. */
1860 | (1 * SARMODE0_GINT)
1861 | (1 * SARMODE0_INTMODE_READCLEAR)
1862 | (0 * SARMODE0_CWRE)
1863 | (IS_FS50(dev)?SARMODE0_PRPWT_FS50_5:
1864 SARMODE0_PRPWT_FS155_3)
1865 | (1 * SARMODE0_CALSUP_1)
1866 | (IS_FS50 (dev)?(0
1867 | SARMODE0_RXVCS_32
1868 | SARMODE0_ABRVCS_32
1869 | SARMODE0_TXVCS_32):
1870 (0
1871 | SARMODE0_RXVCS_1k
1872 | SARMODE0_ABRVCS_1k
1873 | SARMODE0_TXVCS_1k))
1874 | (1 * SARMODE0_RUN));
1875
1876 init_phy (dev, PHY_NTC_INIT);
1877
1878 if (loopback == 2) {
1879 write_phy (dev, 0x39, 0x000e);
1880 }
1881
1882 #ifdef FS_POLL_FREQ
1883 init_timer (&dev->timer);
1884 dev->timer.data = (unsigned long) dev;
1885 dev->timer.function = fs_poll;
1886 dev->timer.expires = jiffies + FS_POLL_FREQ;
1887 add_timer (&dev->timer);
1888 #endif
1889
1890 dev->atm_dev->dev_data = dev;
1891
1892 func_exit ();
1893 return 0;
1894 unmap:
1895 iounmap(dev->base);
1896 return 1;
1897 }
1898
1899 static int __devinit firestream_init_one (struct pci_dev *pci_dev,
1900 const struct pci_device_id *ent)
1901 {
1902 struct atm_dev *atm_dev;
1903 struct fs_dev *fs_dev;
1904
1905 if (pci_enable_device(pci_dev))
1906 goto err_out;
1907
1908 fs_dev = kzalloc (sizeof (struct fs_dev), GFP_KERNEL);
1909 fs_dprintk (FS_DEBUG_ALLOC, "Alloc fs-dev: %p(%Zd)\n",
1910 fs_dev, sizeof (struct fs_dev));
1911 if (!fs_dev)
1912 goto err_out;
1913 atm_dev = atm_dev_register("fs", &ops, -1, NULL);
1914 if (!atm_dev)
1915 goto err_out_free_fs_dev;
1916
1917 fs_dev->pci_dev = pci_dev;
1918 fs_dev->atm_dev = atm_dev;
1919 fs_dev->flags = ent->driver_data;
1920
1921 if (fs_init(fs_dev))
1922 goto err_out_free_atm_dev;
1923
1924 fs_dev->next = fs_boards;
1925 fs_boards = fs_dev;
1926 return 0;
1927
1928 err_out_free_atm_dev:
1929 atm_dev_deregister(atm_dev);
1930 err_out_free_fs_dev:
1931 kfree(fs_dev);
1932 err_out:
1933 return -ENODEV;
1934 }
1935
1936 static void __devexit firestream_remove_one (struct pci_dev *pdev)
1937 {
1938 int i;
1939 struct fs_dev *dev, *nxtdev;
1940 struct fs_vcc *vcc;
1941 struct FS_BPENTRY *fp, *nxt;
1942
1943 func_enter ();
1944
1945 #if 0
1946 printk ("hptxq:\n");
1947 for (i=0;i<60;i++) {
1948 printk ("%d: %08x %08x %08x %08x \n",
1949 i, pq[qp].cmd, pq[qp].p0, pq[qp].p1, pq[qp].p2);
1950 qp++;
1951 if (qp >= 60) qp = 0;
1952 }
1953
1954 printk ("descriptors:\n");
1955 for (i=0;i<60;i++) {
1956 printk ("%d: %p: %08x %08x %p %p\n",
1957 i, da[qd], dq[qd].flags, dq[qd].bsa, dq[qd].skb, dq[qd].dev);
1958 qd++;
1959 if (qd >= 60) qd = 0;
1960 }
1961 #endif
1962
1963 for (dev = fs_boards;dev != NULL;dev=nxtdev) {
1964 fs_dprintk (FS_DEBUG_CLEANUP, "Releasing resources for dev at %p.\n", dev);
1965
1966 /* XXX Hit all the tx channels too! */
1967
1968 for (i=0;i < dev->nchannels;i++) {
1969 if (dev->atm_vccs[i]) {
1970 vcc = FS_VCC (dev->atm_vccs[i]);
1971 submit_command (dev, &dev->hp_txq,
1972 QE_CMD_TX_PURGE_INH | QE_CMD_IMM_INQ | vcc->channo, 0,0,0);
1973 submit_command (dev, &dev->hp_txq,
1974 QE_CMD_RX_PURGE_INH | QE_CMD_IMM_INQ | vcc->channo, 0,0,0);
1975
1976 }
1977 }
1978
1979 /* XXX Wait a while for the chip to release all buffers. */
1980
1981 for (i=0;i < FS_NR_FREE_POOLS;i++) {
1982 for (fp=bus_to_virt (read_fs (dev, FP_SA(dev->rx_fp[i].offset)));
1983 !(fp->flags & FP_FLAGS_EPI);fp = nxt) {
1984 fs_dprintk (FS_DEBUG_ALLOC, "Free rec-skb: %p\n", fp->skb);
1985 dev_kfree_skb_any (fp->skb);
1986 nxt = bus_to_virt (fp->next);
1987 fs_dprintk (FS_DEBUG_ALLOC, "Free rec-d: %p\n", fp);
1988 kfree (fp);
1989 }
1990 fs_dprintk (FS_DEBUG_ALLOC, "Free rec-skb: %p\n", fp->skb);
1991 dev_kfree_skb_any (fp->skb);
1992 fs_dprintk (FS_DEBUG_ALLOC, "Free rec-d: %p\n", fp);
1993 kfree (fp);
1994 }
1995
1996 /* Hang the chip in "reset", prevent it clobbering memory that is
1997 no longer ours. */
1998 reset_chip (dev);
1999
2000 fs_dprintk (FS_DEBUG_CLEANUP, "Freeing irq%d.\n", dev->irq);
2001 free_irq (dev->irq, dev);
2002 del_timer (&dev->timer);
2003
2004 atm_dev_deregister(dev->atm_dev);
2005 free_queue (dev, &dev->hp_txq);
2006 free_queue (dev, &dev->lp_txq);
2007 free_queue (dev, &dev->tx_relq);
2008 free_queue (dev, &dev->st_q);
2009
2010 fs_dprintk (FS_DEBUG_ALLOC, "Free atmvccs: %p\n", dev->atm_vccs);
2011 kfree (dev->atm_vccs);
2012
2013 for (i=0;i< FS_NR_FREE_POOLS;i++)
2014 free_freepool (dev, &dev->rx_fp[i]);
2015
2016 for (i=0;i < FS_NR_RX_QUEUES;i++)
2017 free_queue (dev, &dev->rx_rq[i]);
2018
2019 iounmap(dev->base);
2020 fs_dprintk (FS_DEBUG_ALLOC, "Free fs-dev: %p\n", dev);
2021 nxtdev = dev->next;
2022 kfree (dev);
2023 }
2024
2025 func_exit ();
2026 }
2027
2028 static struct pci_device_id firestream_pci_tbl[] = {
2029 { PCI_VENDOR_ID_FUJITSU_ME, PCI_DEVICE_ID_FUJITSU_FS50,
2030 PCI_ANY_ID, PCI_ANY_ID, 0, 0, FS_IS50},
2031 { PCI_VENDOR_ID_FUJITSU_ME, PCI_DEVICE_ID_FUJITSU_FS155,
2032 PCI_ANY_ID, PCI_ANY_ID, 0, 0, FS_IS155},
2033 { 0, }
2034 };
2035
2036 MODULE_DEVICE_TABLE(pci, firestream_pci_tbl);
2037
2038 static struct pci_driver firestream_driver = {
2039 .name = "firestream",
2040 .id_table = firestream_pci_tbl,
2041 .probe = firestream_init_one,
2042 .remove = __devexit_p(firestream_remove_one),
2043 };
2044
2045 static int __init firestream_init_module (void)
2046 {
2047 int error;
2048
2049 func_enter ();
2050 error = pci_register_driver(&firestream_driver);
2051 func_exit ();
2052 return error;
2053 }
2054
2055 static void __exit firestream_cleanup_module(void)
2056 {
2057 pci_unregister_driver(&firestream_driver);
2058 }
2059
2060 module_init(firestream_init_module);
2061 module_exit(firestream_cleanup_module);
2062
2063 MODULE_LICENSE("GPL");
2064
2065
2066
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