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sfc: Don't use enums as a bitmask.
[zen-stable.git] / drivers / net / wan / sbni.c
blobcff13a9597cd27ee80de90089423df8ea660bdde
1 /* sbni.c: Granch SBNI12 leased line adapters driver for linux
2 *
3 * Written 2001 by Denis I.Timofeev (timofeev@granch.ru)
4 *
5 * Previous versions were written by Yaroslav Polyakov,
6 * Alexey Zverev and Max Khon.
7 *
8 * Driver supports SBNI12-02,-04,-05,-10,-11 cards, single and
9 * double-channel, PCI and ISA modifications.
10 * More info and useful utilities to work with SBNI12 cards you can find
11 * at http://www.granch.com (English) or http://www.granch.ru (Russian)
12 *
13 * This software may be used and distributed according to the terms
14 * of the GNU General Public License.
15 *
16 *
17 * 5.0.1 Jun 22 2001
18 * - Fixed bug in probe
19 * 5.0.0 Jun 06 2001
20 * - Driver was completely redesigned by Denis I.Timofeev,
21 * - now PCI/Dual, ISA/Dual (with single interrupt line) models are
22 * - supported
23 * 3.3.0 Thu Feb 24 21:30:28 NOVT 2000
24 * - PCI cards support
25 * 3.2.0 Mon Dec 13 22:26:53 NOVT 1999
26 * - Completely rebuilt all the packet storage system
27 * - to work in Ethernet-like style.
28 * 3.1.1 just fixed some bugs (5 aug 1999)
29 * 3.1.0 added balancing feature (26 apr 1999)
30 * 3.0.1 just fixed some bugs (14 apr 1999).
31 * 3.0.0 Initial Revision, Yaroslav Polyakov (24 Feb 1999)
32 * - added pre-calculation for CRC, fixed bug with "len-2" frames,
33 * - removed outbound fragmentation (MTU=1000), written CRC-calculation
34 * - on asm, added work with hard_headers and now we have our own cache
35 * - for them, optionally supported word-interchange on some chipsets,
36 *
37 * Known problem: this driver wasn't tested on multiprocessor machine.
38 */
39
40 #include <linux/module.h>
41 #include <linux/kernel.h>
42 #include <linux/ptrace.h>
43 #include <linux/fcntl.h>
44 #include <linux/ioport.h>
45 #include <linux/interrupt.h>
46 #include <linux/string.h>
47 #include <linux/errno.h>
48 #include <linux/netdevice.h>
49 #include <linux/etherdevice.h>
50 #include <linux/pci.h>
51 #include <linux/skbuff.h>
52 #include <linux/timer.h>
53 #include <linux/init.h>
54 #include <linux/delay.h>
55
56 #include <net/net_namespace.h>
57 #include <net/arp.h>
58
59 #include <asm/io.h>
60 #include <asm/types.h>
61 #include <asm/byteorder.h>
62 #include <asm/irq.h>
63 #include <asm/uaccess.h>
64
65 #include "sbni.h"
66
67 /* device private data */
68
69 struct net_local {
70 struct timer_list watchdog;
71
72 spinlock_t lock;
73 struct sk_buff *rx_buf_p; /* receive buffer ptr */
74 struct sk_buff *tx_buf_p; /* transmit buffer ptr */
75
76 unsigned int framelen; /* current frame length */
77 unsigned int maxframe; /* maximum valid frame length */
78 unsigned int state;
79 unsigned int inppos, outpos; /* positions in rx/tx buffers */
80
81 /* transmitting frame number - from frames qty to 1 */
82 unsigned int tx_frameno;
83
84 /* expected number of next receiving frame */
85 unsigned int wait_frameno;
86
87 /* count of failed attempts to frame send - 32 attempts do before
88 error - while receiver tunes on opposite side of wire */
89 unsigned int trans_errors;
90
91 /* idle time; send pong when limit exceeded */
92 unsigned int timer_ticks;
93
94 /* fields used for receive level autoselection */
95 int delta_rxl;
96 unsigned int cur_rxl_index, timeout_rxl;
97 unsigned long cur_rxl_rcvd, prev_rxl_rcvd;
98
99 struct sbni_csr1 csr1; /* current value of CSR1 */
100 struct sbni_in_stats in_stats; /* internal statistics */
101
102 struct net_device *second; /* for ISA/dual cards */
103
104 #ifdef CONFIG_SBNI_MULTILINE
105 struct net_device *master;
106 struct net_device *link;
107 #endif
108 };
109
110
111 static int sbni_card_probe( unsigned long );
112 static int sbni_pci_probe( struct net_device * );
113 static struct net_device *sbni_probe1(struct net_device *, unsigned long, int);
114 static int sbni_open( struct net_device * );
115 static int sbni_close( struct net_device * );
116 static netdev_tx_t sbni_start_xmit(struct sk_buff *,
117 struct net_device * );
118 static int sbni_ioctl( struct net_device *, struct ifreq *, int );
119 static void set_multicast_list( struct net_device * );
120
121 static irqreturn_t sbni_interrupt( int, void * );
122 static void handle_channel( struct net_device * );
123 static int recv_frame( struct net_device * );
124 static void send_frame( struct net_device * );
125 static int upload_data( struct net_device *,
126 unsigned, unsigned, unsigned, u32 );
127 static void download_data( struct net_device *, u32 * );
128 static void sbni_watchdog( unsigned long );
129 static void interpret_ack( struct net_device *, unsigned );
130 static int append_frame_to_pkt( struct net_device *, unsigned, u32 );
131 static void indicate_pkt( struct net_device * );
132 static void card_start( struct net_device * );
133 static void prepare_to_send( struct sk_buff *, struct net_device * );
134 static void drop_xmit_queue( struct net_device * );
135 static void send_frame_header( struct net_device *, u32 * );
136 static int skip_tail( unsigned int, unsigned int, u32 );
137 static int check_fhdr( u32, u32 *, u32 *, u32 *, u32 *, u32 * );
138 static void change_level( struct net_device * );
139 static void timeout_change_level( struct net_device * );
140 static u32 calc_crc32( u32, u8 *, u32 );
141 static struct sk_buff * get_rx_buf( struct net_device * );
142 static int sbni_init( struct net_device * );
143
144 #ifdef CONFIG_SBNI_MULTILINE
145 static int enslave( struct net_device *, struct net_device * );
146 static int emancipate( struct net_device * );
147 #endif
148
149 #ifdef __i386__
150 #define ASM_CRC 1
151 #endif
152
153 static const char version[] =
154 "Granch SBNI12 driver ver 5.0.1 Jun 22 2001 Denis I.Timofeev.\n";
155
156 static int skip_pci_probe __initdata = 0;
157 static int scandone __initdata = 0;
158 static int num __initdata = 0;
159
160 static unsigned char rxl_tab[];
161 static u32 crc32tab[];
162
163 /* A list of all installed devices, for removing the driver module. */
164 static struct net_device *sbni_cards[ SBNI_MAX_NUM_CARDS ];
165
166 /* Lists of device's parameters */
167 static u32 io[ SBNI_MAX_NUM_CARDS ] __initdata =
168 { [0 ... SBNI_MAX_NUM_CARDS-1] = -1 };
169 static u32 irq[ SBNI_MAX_NUM_CARDS ] __initdata;
170 static u32 baud[ SBNI_MAX_NUM_CARDS ] __initdata;
171 static u32 rxl[ SBNI_MAX_NUM_CARDS ] __initdata =
172 { [0 ... SBNI_MAX_NUM_CARDS-1] = -1 };
173 static u32 mac[ SBNI_MAX_NUM_CARDS ] __initdata;
174
175 #ifndef MODULE
176 typedef u32 iarr[];
177 static iarr __initdata *dest[5] = { &io, &irq, &baud, &rxl, &mac };
178 #endif
179
180 /* A zero-terminated list of I/O addresses to be probed on ISA bus */
181 static unsigned int netcard_portlist[ ] __initdata = {
182 0x210, 0x214, 0x220, 0x224, 0x230, 0x234, 0x240, 0x244, 0x250, 0x254,
183 0x260, 0x264, 0x270, 0x274, 0x280, 0x284, 0x290, 0x294, 0x2a0, 0x2a4,
184 0x2b0, 0x2b4, 0x2c0, 0x2c4, 0x2d0, 0x2d4, 0x2e0, 0x2e4, 0x2f0, 0x2f4,
185 0 };
186
187 #define NET_LOCAL_LOCK(dev) (((struct net_local *)netdev_priv(dev))->lock)
188
189 /*
190 * Look for SBNI card which addr stored in dev->base_addr, if nonzero.
191 * Otherwise, look through PCI bus. If none PCI-card was found, scan ISA.
192 */
193
194 static inline int __init
195 sbni_isa_probe( struct net_device *dev )
196 {
197 if( dev->base_addr > 0x1ff &&
198 request_region( dev->base_addr, SBNI_IO_EXTENT, dev->name ) &&
199 sbni_probe1( dev, dev->base_addr, dev->irq ) )
200
201 return 0;
202 else {
203 printk( KERN_ERR "sbni: base address 0x%lx is busy, or adapter "
204 "is malfunctional!\n", dev->base_addr );
205 return -ENODEV;
206 }
207 }
208
209 static const struct net_device_ops sbni_netdev_ops = {
210 .ndo_open = sbni_open,
211 .ndo_stop = sbni_close,
212 .ndo_start_xmit = sbni_start_xmit,
213 .ndo_set_multicast_list = set_multicast_list,
214 .ndo_do_ioctl = sbni_ioctl,
215 .ndo_change_mtu = eth_change_mtu,
216 .ndo_set_mac_address = eth_mac_addr,
217 .ndo_validate_addr = eth_validate_addr,
218 };
219
220 static void __init sbni_devsetup(struct net_device *dev)
221 {
222 ether_setup( dev );
223 dev->netdev_ops = &sbni_netdev_ops;
224 }
225
226 int __init sbni_probe(int unit)
227 {
228 struct net_device *dev;
229 static unsigned version_printed __initdata = 0;
230 int err;
231
232 dev = alloc_netdev(sizeof(struct net_local), "sbni", sbni_devsetup);
233 if (!dev)
234 return -ENOMEM;
235
236 dev->netdev_ops = &sbni_netdev_ops;
237
238 sprintf(dev->name, "sbni%d", unit);
239 netdev_boot_setup_check(dev);
240
241 err = sbni_init(dev);
242 if (err) {
243 free_netdev(dev);
244 return err;
245 }
246
247 err = register_netdev(dev);
248 if (err) {
249 release_region( dev->base_addr, SBNI_IO_EXTENT );
250 free_netdev(dev);
251 return err;
252 }
253 if( version_printed++ == 0 )
254 printk( KERN_INFO "%s", version );
255 return 0;
256 }
257
258 static int __init sbni_init(struct net_device *dev)
259 {
260 int i;
261 if( dev->base_addr )
262 return sbni_isa_probe( dev );
263 /* otherwise we have to perform search our adapter */
264
265 if( io[ num ] != -1 )
266 dev->base_addr = io[ num ],
267 dev->irq = irq[ num ];
268 else if( scandone || io[ 0 ] != -1 )
269 return -ENODEV;
270
271 /* if io[ num ] contains non-zero address, then that is on ISA bus */
272 if( dev->base_addr )
273 return sbni_isa_probe( dev );
274
275 /* ...otherwise - scan PCI first */
276 if( !skip_pci_probe && !sbni_pci_probe( dev ) )
277 return 0;
278
279 if( io[ num ] == -1 ) {
280 /* Auto-scan will be stopped when first ISA card were found */
281 scandone = 1;
282 if( num > 0 )
283 return -ENODEV;
284 }
285
286 for( i = 0; netcard_portlist[ i ]; ++i ) {
287 int ioaddr = netcard_portlist[ i ];
288 if( request_region( ioaddr, SBNI_IO_EXTENT, dev->name ) &&
289 sbni_probe1( dev, ioaddr, 0 ))
290 return 0;
291 }
292
293 return -ENODEV;
294 }
295
296
297 static int __init
298 sbni_pci_probe( struct net_device *dev )
299 {
300 struct pci_dev *pdev = NULL;
301
302 while( (pdev = pci_get_class( PCI_CLASS_NETWORK_OTHER << 8, pdev ))
303 != NULL ) {
304 int pci_irq_line;
305 unsigned long pci_ioaddr;
306 u16 subsys;
307
308 if( pdev->vendor != SBNI_PCI_VENDOR &&
309 pdev->device != SBNI_PCI_DEVICE )
310 continue;
311
312 pci_ioaddr = pci_resource_start( pdev, 0 );
313 pci_irq_line = pdev->irq;
314
315 /* Avoid already found cards from previous calls */
316 if( !request_region( pci_ioaddr, SBNI_IO_EXTENT, dev->name ) ) {
317 pci_read_config_word( pdev, PCI_SUBSYSTEM_ID, &subsys );
318
319 if (subsys != 2)
320 continue;
321
322 /* Dual adapter is present */
323 if (!request_region(pci_ioaddr += 4, SBNI_IO_EXTENT,
324 dev->name ) )
325 continue;
326 }
327
328 if (pci_irq_line <= 0 || pci_irq_line >= nr_irqs)
329 printk( KERN_WARNING
330 " WARNING: The PCI BIOS assigned this PCI card to IRQ %d, which is unlikely to work!.\n"
331 " You should use the PCI BIOS setup to assign a valid IRQ line.\n",
332 pci_irq_line );
333
334 /* avoiding re-enable dual adapters */
335 if( (pci_ioaddr & 7) == 0 && pci_enable_device( pdev ) ) {
336 release_region( pci_ioaddr, SBNI_IO_EXTENT );
337 pci_dev_put( pdev );
338 return -EIO;
339 }
340 if( sbni_probe1( dev, pci_ioaddr, pci_irq_line ) ) {
341 SET_NETDEV_DEV(dev, &pdev->dev);
342 /* not the best thing to do, but this is all messed up
343 for hotplug systems anyway... */
344 pci_dev_put( pdev );
345 return 0;
346 }
347 }
348 return -ENODEV;
349 }
350
351
352 static struct net_device * __init
353 sbni_probe1( struct net_device *dev, unsigned long ioaddr, int irq )
354 {
355 struct net_local *nl;
356
357 if( sbni_card_probe( ioaddr ) ) {
358 release_region( ioaddr, SBNI_IO_EXTENT );
359 return NULL;
360 }
361
362 outb( 0, ioaddr + CSR0 );
363
364 if( irq < 2 ) {
365 unsigned long irq_mask;
366
367 irq_mask = probe_irq_on();
368 outb( EN_INT | TR_REQ, ioaddr + CSR0 );
369 outb( PR_RES, ioaddr + CSR1 );
370 mdelay(50);
371 irq = probe_irq_off(irq_mask);
372 outb( 0, ioaddr + CSR0 );
373
374 if( !irq ) {
375 printk( KERN_ERR "%s: can't detect device irq!\n",
376 dev->name );
377 release_region( ioaddr, SBNI_IO_EXTENT );
378 return NULL;
379 }
380 } else if( irq == 2 )
381 irq = 9;
382
383 dev->irq = irq;
384 dev->base_addr = ioaddr;
385
386 /* Fill in sbni-specific dev fields. */
387 nl = netdev_priv(dev);
388 if( !nl ) {
389 printk( KERN_ERR "%s: unable to get memory!\n", dev->name );
390 release_region( ioaddr, SBNI_IO_EXTENT );
391 return NULL;
392 }
393
394 memset( nl, 0, sizeof(struct net_local) );
395 spin_lock_init( &nl->lock );
396
397 /* store MAC address (generate if that isn't known) */
398 *(__be16 *)dev->dev_addr = htons( 0x00ff );
399 *(__be32 *)(dev->dev_addr + 2) = htonl( 0x01000000 |
400 ((mac[num] ?
401 mac[num] :
402 (u32)((long)netdev_priv(dev))) & 0x00ffffff));
403
404 /* store link settings (speed, receive level ) */
405 nl->maxframe = DEFAULT_FRAME_LEN;
406 nl->csr1.rate = baud[ num ];
407
408 if( (nl->cur_rxl_index = rxl[ num ]) == -1 )
409 /* autotune rxl */
410 nl->cur_rxl_index = DEF_RXL,
411 nl->delta_rxl = DEF_RXL_DELTA;
412 else
413 nl->delta_rxl = 0;
414 nl->csr1.rxl = rxl_tab[ nl->cur_rxl_index ];
415 if( inb( ioaddr + CSR0 ) & 0x01 )
416 nl->state |= FL_SLOW_MODE;
417
418 printk( KERN_NOTICE "%s: ioaddr %#lx, irq %d, "
419 "MAC: 00:ff:01:%02x:%02x:%02x\n",
420 dev->name, dev->base_addr, dev->irq,
421 ((u8 *) dev->dev_addr) [3],
422 ((u8 *) dev->dev_addr) [4],
423 ((u8 *) dev->dev_addr) [5] );
424
425 printk( KERN_NOTICE "%s: speed %d, receive level ", dev->name,
426 ( (nl->state & FL_SLOW_MODE) ? 500000 : 2000000)
427 / (1 << nl->csr1.rate) );
428
429 if( nl->delta_rxl == 0 )
430 printk( "0x%x (fixed)\n", nl->cur_rxl_index );
431 else
432 printk( "(auto)\n");
433
434 #ifdef CONFIG_SBNI_MULTILINE
435 nl->master = dev;
436 nl->link = NULL;
437 #endif
438
439 sbni_cards[ num++ ] = dev;
440 return dev;
441 }
442
443 /* -------------------------------------------------------------------------- */
444
445 #ifdef CONFIG_SBNI_MULTILINE
446
447 static netdev_tx_t
448 sbni_start_xmit( struct sk_buff *skb, struct net_device *dev )
449 {
450 struct net_device *p;
451
452 netif_stop_queue( dev );
453
454 /* Looking for idle device in the list */
455 for( p = dev; p; ) {
456 struct net_local *nl = netdev_priv(p);
457 spin_lock( &nl->lock );
458 if( nl->tx_buf_p || (nl->state & FL_LINE_DOWN) ) {
459 p = nl->link;
460 spin_unlock( &nl->lock );
461 } else {
462 /* Idle dev is found */
463 prepare_to_send( skb, p );
464 spin_unlock( &nl->lock );
465 netif_start_queue( dev );
466 return NETDEV_TX_OK;
467 }
468 }
469
470 return NETDEV_TX_BUSY;
471 }
472
473 #else /* CONFIG_SBNI_MULTILINE */
474
475 static netdev_tx_t
476 sbni_start_xmit( struct sk_buff *skb, struct net_device *dev )
477 {
478 struct net_local *nl = netdev_priv(dev);
479
480 netif_stop_queue( dev );
481 spin_lock( &nl->lock );
482
483 prepare_to_send( skb, dev );
484
485 spin_unlock( &nl->lock );
486 return NETDEV_TX_OK;
487 }
488
489 #endif /* CONFIG_SBNI_MULTILINE */
490
491 /* -------------------------------------------------------------------------- */
492
493 /* interrupt handler */
494
495 /*
496 * SBNI12D-10, -11/ISA boards within "common interrupt" mode could not
497 * be looked as two independent single-channel devices. Every channel seems
498 * as Ethernet interface but interrupt handler must be common. Really, first
499 * channel ("master") driver only registers the handler. In its struct net_local
500 * it has got pointer to "slave" channel's struct net_local and handles that's
501 * interrupts too.
502 * dev of successfully attached ISA SBNI boards is linked to list.
503 * While next board driver is initialized, it scans this list. If one
504 * has found dev with same irq and ioaddr different by 4 then it assumes
505 * this board to be "master".
506 */
507
508 static irqreturn_t
509 sbni_interrupt( int irq, void *dev_id )
510 {
511 struct net_device *dev = dev_id;
512 struct net_local *nl = netdev_priv(dev);
513 int repeat;
514
515 spin_lock( &nl->lock );
516 if( nl->second )
517 spin_lock(&NET_LOCAL_LOCK(nl->second));
518
519 do {
520 repeat = 0;
521 if( inb( dev->base_addr + CSR0 ) & (RC_RDY | TR_RDY) )
522 handle_channel( dev ),
523 repeat = 1;
524 if( nl->second && /* second channel present */
525 (inb( nl->second->base_addr+CSR0 ) & (RC_RDY | TR_RDY)) )
526 handle_channel( nl->second ),
527 repeat = 1;
528 } while( repeat );
529
530 if( nl->second )
531 spin_unlock(&NET_LOCAL_LOCK(nl->second));
532 spin_unlock( &nl->lock );
533 return IRQ_HANDLED;
534 }
535
536
537 static void
538 handle_channel( struct net_device *dev )
539 {
540 struct net_local *nl = netdev_priv(dev);
541 unsigned long ioaddr = dev->base_addr;
542
543 int req_ans;
544 unsigned char csr0;
545
546 #ifdef CONFIG_SBNI_MULTILINE
547 /* Lock the master device because we going to change its local data */
548 if( nl->state & FL_SLAVE )
549 spin_lock(&NET_LOCAL_LOCK(nl->master));
550 #endif
551
552 outb( (inb( ioaddr + CSR0 ) & ~EN_INT) | TR_REQ, ioaddr + CSR0 );
553
554 nl->timer_ticks = CHANGE_LEVEL_START_TICKS;
555 for(;;) {
556 csr0 = inb( ioaddr + CSR0 );
557 if( ( csr0 & (RC_RDY | TR_RDY) ) == 0 )
558 break;
559
560 req_ans = !(nl->state & FL_PREV_OK);
561
562 if( csr0 & RC_RDY )
563 req_ans = recv_frame( dev );
564
565 /*
566 * TR_RDY always equals 1 here because we have owned the marker,
567 * and we set TR_REQ when disabled interrupts
568 */
569 csr0 = inb( ioaddr + CSR0 );
570 if( !(csr0 & TR_RDY) || (csr0 & RC_RDY) )
571 printk( KERN_ERR "%s: internal error!\n", dev->name );
572
573 /* if state & FL_NEED_RESEND != 0 then tx_frameno != 0 */
574 if( req_ans || nl->tx_frameno != 0 )
575 send_frame( dev );
576 else
577 /* send marker without any data */
578 outb( inb( ioaddr + CSR0 ) & ~TR_REQ, ioaddr + CSR0 );
579 }
580
581 outb( inb( ioaddr + CSR0 ) | EN_INT, ioaddr + CSR0 );
582
583 #ifdef CONFIG_SBNI_MULTILINE
584 if( nl->state & FL_SLAVE )
585 spin_unlock(&NET_LOCAL_LOCK(nl->master));
586 #endif
587 }
588
589
590 /*
591 * Routine returns 1 if it need to acknoweledge received frame.
592 * Empty frame received without errors won't be acknoweledged.
593 */
594
595 static int
596 recv_frame( struct net_device *dev )
597 {
598 struct net_local *nl = netdev_priv(dev);
599 unsigned long ioaddr = dev->base_addr;
600
601 u32 crc = CRC32_INITIAL;
602
603 unsigned framelen = 0, frameno, ack;
604 unsigned is_first, frame_ok = 0;
605
606 if( check_fhdr( ioaddr, &framelen, &frameno, &ack, &is_first, &crc ) ) {
607 frame_ok = framelen > 4
608 ? upload_data( dev, framelen, frameno, is_first, crc )
609 : skip_tail( ioaddr, framelen, crc );
610 if( frame_ok )
611 interpret_ack( dev, ack );
612 }
613
614 outb( inb( ioaddr + CSR0 ) ^ CT_ZER, ioaddr + CSR0 );
615 if( frame_ok ) {
616 nl->state |= FL_PREV_OK;
617 if( framelen > 4 )
618 nl->in_stats.all_rx_number++;
619 } else
620 nl->state &= ~FL_PREV_OK,
621 change_level( dev ),
622 nl->in_stats.all_rx_number++,
623 nl->in_stats.bad_rx_number++;
624
625 return !frame_ok || framelen > 4;
626 }
627
628
629 static void
630 send_frame( struct net_device *dev )
631 {
632 struct net_local *nl = netdev_priv(dev);
633
634 u32 crc = CRC32_INITIAL;
635
636 if( nl->state & FL_NEED_RESEND ) {
637
638 /* if frame was sended but not ACK'ed - resend it */
639 if( nl->trans_errors ) {
640 --nl->trans_errors;
641 if( nl->framelen != 0 )
642 nl->in_stats.resend_tx_number++;
643 } else {
644 /* cannot xmit with many attempts */
645 #ifdef CONFIG_SBNI_MULTILINE
646 if( (nl->state & FL_SLAVE) || nl->link )
647 #endif
648 nl->state |= FL_LINE_DOWN;
649 drop_xmit_queue( dev );
650 goto do_send;
651 }
652 } else
653 nl->trans_errors = TR_ERROR_COUNT;
654
655 send_frame_header( dev, &crc );
656 nl->state |= FL_NEED_RESEND;
657 /*
658 * FL_NEED_RESEND will be cleared after ACK, but if empty
659 * frame sended then in prepare_to_send next frame
660 */
661
662
663 if( nl->framelen ) {
664 download_data( dev, &crc );
665 nl->in_stats.all_tx_number++;
666 nl->state |= FL_WAIT_ACK;
667 }
668
669 outsb( dev->base_addr + DAT, (u8 *)&crc, sizeof crc );
670
671 do_send:
672 outb( inb( dev->base_addr + CSR0 ) & ~TR_REQ, dev->base_addr + CSR0 );
673
674 if( nl->tx_frameno )
675 /* next frame exists - we request card to send it */
676 outb( inb( dev->base_addr + CSR0 ) | TR_REQ,
677 dev->base_addr + CSR0 );
678 }
679
680
681 /*
682 * Write the frame data into adapter's buffer memory, and calculate CRC.
683 * Do padding if necessary.
684 */
685
686 static void
687 download_data( struct net_device *dev, u32 *crc_p )
688 {
689 struct net_local *nl = netdev_priv(dev);
690 struct sk_buff *skb = nl->tx_buf_p;
691
692 unsigned len = min_t(unsigned int, skb->len - nl->outpos, nl->framelen);
693
694 outsb( dev->base_addr + DAT, skb->data + nl->outpos, len );
695 *crc_p = calc_crc32( *crc_p, skb->data + nl->outpos, len );
696
697 /* if packet too short we should write some more bytes to pad */
698 for( len = nl->framelen - len; len--; )
699 outb( 0, dev->base_addr + DAT ),
700 *crc_p = CRC32( 0, *crc_p );
701 }
702
703
704 static int
705 upload_data( struct net_device *dev, unsigned framelen, unsigned frameno,
706 unsigned is_first, u32 crc )
707 {
708 struct net_local *nl = netdev_priv(dev);
709
710 int frame_ok;
711
712 if( is_first )
713 nl->wait_frameno = frameno,
714 nl->inppos = 0;
715
716 if( nl->wait_frameno == frameno ) {
717
718 if( nl->inppos + framelen <= ETHER_MAX_LEN )
719 frame_ok = append_frame_to_pkt( dev, framelen, crc );
720
721 /*
722 * if CRC is right but framelen incorrect then transmitter
723 * error was occurred... drop entire packet
724 */
725 else if( (frame_ok = skip_tail( dev->base_addr, framelen, crc ))
726 != 0 )
727 nl->wait_frameno = 0,
728 nl->inppos = 0,
729 #ifdef CONFIG_SBNI_MULTILINE
730 nl->master->stats.rx_errors++,
731 nl->master->stats.rx_missed_errors++;
732 #else
733 dev->stats.rx_errors++,
734 dev->stats.rx_missed_errors++;
735 #endif
736 /* now skip all frames until is_first != 0 */
737 } else
738 frame_ok = skip_tail( dev->base_addr, framelen, crc );
739
740 if( is_first && !frame_ok )
741 /*
742 * Frame has been broken, but we had already stored
743 * is_first... Drop entire packet.
744 */
745 nl->wait_frameno = 0,
746 #ifdef CONFIG_SBNI_MULTILINE
747 nl->master->stats.rx_errors++,
748 nl->master->stats.rx_crc_errors++;
749 #else
750 dev->stats.rx_errors++,
751 dev->stats.rx_crc_errors++;
752 #endif
753
754 return frame_ok;
755 }
756
757
758 static inline void
759 send_complete( struct net_device *dev )
760 {
761 struct net_local *nl = netdev_priv(dev);
762
763 #ifdef CONFIG_SBNI_MULTILINE
764 nl->master->stats.tx_packets++;
765 nl->master->stats.tx_bytes += nl->tx_buf_p->len;
766 #else
767 dev->stats.tx_packets++;
768 dev->stats.tx_bytes += nl->tx_buf_p->len;
769 #endif
770 dev_kfree_skb_irq( nl->tx_buf_p );
771
772 nl->tx_buf_p = NULL;
773
774 nl->outpos = 0;
775 nl->state &= ~(FL_WAIT_ACK | FL_NEED_RESEND);
776 nl->framelen = 0;
777 }
778
779
780 static void
781 interpret_ack( struct net_device *dev, unsigned ack )
782 {
783 struct net_local *nl = netdev_priv(dev);
784
785 if( ack == FRAME_SENT_OK ) {
786 nl->state &= ~FL_NEED_RESEND;
787
788 if( nl->state & FL_WAIT_ACK ) {
789 nl->outpos += nl->framelen;
790
791 if( --nl->tx_frameno )
792 nl->framelen = min_t(unsigned int,
793 nl->maxframe,
794 nl->tx_buf_p->len - nl->outpos);
795 else
796 send_complete( dev ),
797 #ifdef CONFIG_SBNI_MULTILINE
798 netif_wake_queue( nl->master );
799 #else
800 netif_wake_queue( dev );
801 #endif
802 }
803 }
804
805 nl->state &= ~FL_WAIT_ACK;
806 }
807
808
809 /*
810 * Glue received frame with previous fragments of packet.
811 * Indicate packet when last frame would be accepted.
812 */
813
814 static int
815 append_frame_to_pkt( struct net_device *dev, unsigned framelen, u32 crc )
816 {
817 struct net_local *nl = netdev_priv(dev);
818
819 u8 *p;
820
821 if( nl->inppos + framelen > ETHER_MAX_LEN )
822 return 0;
823
824 if( !nl->rx_buf_p && !(nl->rx_buf_p = get_rx_buf( dev )) )
825 return 0;
826
827 p = nl->rx_buf_p->data + nl->inppos;
828 insb( dev->base_addr + DAT, p, framelen );
829 if( calc_crc32( crc, p, framelen ) != CRC32_REMAINDER )
830 return 0;
831
832 nl->inppos += framelen - 4;
833 if( --nl->wait_frameno == 0 ) /* last frame received */
834 indicate_pkt( dev );
835
836 return 1;
837 }
838
839
840 /*
841 * Prepare to start output on adapter.
842 * Transmitter will be actually activated when marker is accepted.
843 */
844
845 static void
846 prepare_to_send( struct sk_buff *skb, struct net_device *dev )
847 {
848 struct net_local *nl = netdev_priv(dev);
849
850 unsigned int len;
851
852 /* nl->tx_buf_p == NULL here! */
853 if( nl->tx_buf_p )
854 printk( KERN_ERR "%s: memory leak!\n", dev->name );
855
856 nl->outpos = 0;
857 nl->state &= ~(FL_WAIT_ACK | FL_NEED_RESEND);
858
859 len = skb->len;
860 if( len < SBNI_MIN_LEN )
861 len = SBNI_MIN_LEN;
862
863 nl->tx_buf_p = skb;
864 nl->tx_frameno = DIV_ROUND_UP(len, nl->maxframe);
865 nl->framelen = len < nl->maxframe ? len : nl->maxframe;
866
867 outb( inb( dev->base_addr + CSR0 ) | TR_REQ, dev->base_addr + CSR0 );
868 #ifdef CONFIG_SBNI_MULTILINE
869 nl->master->trans_start = jiffies;
870 #else
871 dev->trans_start = jiffies;
872 #endif
873 }
874
875
876 static void
877 drop_xmit_queue( struct net_device *dev )
878 {
879 struct net_local *nl = netdev_priv(dev);
880
881 if( nl->tx_buf_p )
882 dev_kfree_skb_any( nl->tx_buf_p ),
883 nl->tx_buf_p = NULL,
884 #ifdef CONFIG_SBNI_MULTILINE
885 nl->master->stats.tx_errors++,
886 nl->master->stats.tx_carrier_errors++;
887 #else
888 dev->stats.tx_errors++,
889 dev->stats.tx_carrier_errors++;
890 #endif
891
892 nl->tx_frameno = 0;
893 nl->framelen = 0;
894 nl->outpos = 0;
895 nl->state &= ~(FL_WAIT_ACK | FL_NEED_RESEND);
896 #ifdef CONFIG_SBNI_MULTILINE
897 netif_start_queue( nl->master );
898 nl->master->trans_start = jiffies;
899 #else
900 netif_start_queue( dev );
901 dev->trans_start = jiffies;
902 #endif
903 }
904
905
906 static void
907 send_frame_header( struct net_device *dev, u32 *crc_p )
908 {
909 struct net_local *nl = netdev_priv(dev);
910
911 u32 crc = *crc_p;
912 u32 len_field = nl->framelen + 6; /* CRC + frameno + reserved */
913 u8 value;
914
915 if( nl->state & FL_NEED_RESEND )
916 len_field |= FRAME_RETRY; /* non-first attempt... */
917
918 if( nl->outpos == 0 )
919 len_field |= FRAME_FIRST;
920
921 len_field |= (nl->state & FL_PREV_OK) ? FRAME_SENT_OK : FRAME_SENT_BAD;
922 outb( SBNI_SIG, dev->base_addr + DAT );
923
924 value = (u8) len_field;
925 outb( value, dev->base_addr + DAT );
926 crc = CRC32( value, crc );
927 value = (u8) (len_field >> 8);
928 outb( value, dev->base_addr + DAT );
929 crc = CRC32( value, crc );
930
931 outb( nl->tx_frameno, dev->base_addr + DAT );
932 crc = CRC32( nl->tx_frameno, crc );
933 outb( 0, dev->base_addr + DAT );
934 crc = CRC32( 0, crc );
935 *crc_p = crc;
936 }
937
938
939 /*
940 * if frame tail not needed (incorrect number or received twice),
941 * it won't store, but CRC will be calculated
942 */
943
944 static int
945 skip_tail( unsigned int ioaddr, unsigned int tail_len, u32 crc )
946 {
947 while( tail_len-- )
948 crc = CRC32( inb( ioaddr + DAT ), crc );
949
950 return crc == CRC32_REMAINDER;
951 }
952
953
954 /*
955 * Preliminary checks if frame header is correct, calculates its CRC
956 * and split it to simple fields
957 */
958
959 static int
960 check_fhdr( u32 ioaddr, u32 *framelen, u32 *frameno, u32 *ack,
961 u32 *is_first, u32 *crc_p )
962 {
963 u32 crc = *crc_p;
964 u8 value;
965
966 if( inb( ioaddr + DAT ) != SBNI_SIG )
967 return 0;
968
969 value = inb( ioaddr + DAT );
970 *framelen = (u32)value;
971 crc = CRC32( value, crc );
972 value = inb( ioaddr + DAT );
973 *framelen |= ((u32)value) << 8;
974 crc = CRC32( value, crc );
975
976 *ack = *framelen & FRAME_ACK_MASK;
977 *is_first = (*framelen & FRAME_FIRST) != 0;
978
979 if( (*framelen &= FRAME_LEN_MASK) < 6 ||
980 *framelen > SBNI_MAX_FRAME - 3 )
981 return 0;
982
983 value = inb( ioaddr + DAT );
984 *frameno = (u32)value;
985 crc = CRC32( value, crc );
986
987 crc = CRC32( inb( ioaddr + DAT ), crc ); /* reserved byte */
988 *framelen -= 2;
989
990 *crc_p = crc;
991 return 1;
992 }
993
994
995 static struct sk_buff *
996 get_rx_buf( struct net_device *dev )
997 {
998 /* +2 is to compensate for the alignment fixup below */
999 struct sk_buff *skb = dev_alloc_skb( ETHER_MAX_LEN + 2 );
1000 if( !skb )
1001 return NULL;
1002
1003 skb_reserve( skb, 2 ); /* Align IP on longword boundaries */
1004 return skb;
1005 }
1006
1007
1008 static void
1009 indicate_pkt( struct net_device *dev )
1010 {
1011 struct net_local *nl = netdev_priv(dev);
1012 struct sk_buff *skb = nl->rx_buf_p;
1013
1014 skb_put( skb, nl->inppos );
1015
1016 #ifdef CONFIG_SBNI_MULTILINE
1017 skb->protocol = eth_type_trans( skb, nl->master );
1018 netif_rx( skb );
1019 ++nl->master->stats.rx_packets;
1020 nl->master->stats.rx_bytes += nl->inppos;
1021 #else
1022 skb->protocol = eth_type_trans( skb, dev );
1023 netif_rx( skb );
1024 ++dev->stats.rx_packets;
1025 dev->stats.rx_bytes += nl->inppos;
1026 #endif
1027 nl->rx_buf_p = NULL; /* protocol driver will clear this sk_buff */
1028 }
1029
1030
1031 /* -------------------------------------------------------------------------- */
1032
1033 /*
1034 * Routine checks periodically wire activity and regenerates marker if
1035 * connect was inactive for a long time.
1036 */
1037
1038 static void
1039 sbni_watchdog( unsigned long arg )
1040 {
1041 struct net_device *dev = (struct net_device *) arg;
1042 struct net_local *nl = netdev_priv(dev);
1043 struct timer_list *w = &nl->watchdog;
1044 unsigned long flags;
1045 unsigned char csr0;
1046
1047 spin_lock_irqsave( &nl->lock, flags );
1048
1049 csr0 = inb( dev->base_addr + CSR0 );
1050 if( csr0 & RC_CHK ) {
1051
1052 if( nl->timer_ticks ) {
1053 if( csr0 & (RC_RDY | BU_EMP) )
1054 /* receiving not active */
1055 nl->timer_ticks--;
1056 } else {
1057 nl->in_stats.timeout_number++;
1058 if( nl->delta_rxl )
1059 timeout_change_level( dev );
1060
1061 outb( *(u_char *)&nl->csr1 | PR_RES,
1062 dev->base_addr + CSR1 );
1063 csr0 = inb( dev->base_addr + CSR0 );
1064 }
1065 } else
1066 nl->state &= ~FL_LINE_DOWN;
1067
1068 outb( csr0 | RC_CHK, dev->base_addr + CSR0 );
1069
1070 init_timer( w );
1071 w->expires = jiffies + SBNI_TIMEOUT;
1072 w->data = arg;
1073 w->function = sbni_watchdog;
1074 add_timer( w );
1075
1076 spin_unlock_irqrestore( &nl->lock, flags );
1077 }
1078
1079
1080 static unsigned char rxl_tab[] = {
1081 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x08,
1082 0x0a, 0x0c, 0x0f, 0x16, 0x18, 0x1a, 0x1c, 0x1f
1083 };
1084
1085 #define SIZE_OF_TIMEOUT_RXL_TAB 4
1086 static unsigned char timeout_rxl_tab[] = {
1087 0x03, 0x05, 0x08, 0x0b
1088 };
1089
1090 /* -------------------------------------------------------------------------- */
1091
1092 static void
1093 card_start( struct net_device *dev )
1094 {
1095 struct net_local *nl = netdev_priv(dev);
1096
1097 nl->timer_ticks = CHANGE_LEVEL_START_TICKS;
1098 nl->state &= ~(FL_WAIT_ACK | FL_NEED_RESEND);
1099 nl->state |= FL_PREV_OK;
1100
1101 nl->inppos = nl->outpos = 0;
1102 nl->wait_frameno = 0;
1103 nl->tx_frameno = 0;
1104 nl->framelen = 0;
1105
1106 outb( *(u_char *)&nl->csr1 | PR_RES, dev->base_addr + CSR1 );
1107 outb( EN_INT, dev->base_addr + CSR0 );
1108 }
1109
1110 /* -------------------------------------------------------------------------- */
1111
1112 /* Receive level auto-selection */
1113
1114 static void
1115 change_level( struct net_device *dev )
1116 {
1117 struct net_local *nl = netdev_priv(dev);
1118
1119 if( nl->delta_rxl == 0 ) /* do not auto-negotiate RxL */
1120 return;
1121
1122 if( nl->cur_rxl_index == 0 )
1123 nl->delta_rxl = 1;
1124 else if( nl->cur_rxl_index == 15 )
1125 nl->delta_rxl = -1;
1126 else if( nl->cur_rxl_rcvd < nl->prev_rxl_rcvd )
1127 nl->delta_rxl = -nl->delta_rxl;
1128
1129 nl->csr1.rxl = rxl_tab[ nl->cur_rxl_index += nl->delta_rxl ];
1130 inb( dev->base_addr + CSR0 ); /* needs for PCI cards */
1131 outb( *(u8 *)&nl->csr1, dev->base_addr + CSR1 );
1132
1133 nl->prev_rxl_rcvd = nl->cur_rxl_rcvd;
1134 nl->cur_rxl_rcvd = 0;
1135 }
1136
1137
1138 static void
1139 timeout_change_level( struct net_device *dev )
1140 {
1141 struct net_local *nl = netdev_priv(dev);
1142
1143 nl->cur_rxl_index = timeout_rxl_tab[ nl->timeout_rxl ];
1144 if( ++nl->timeout_rxl >= 4 )
1145 nl->timeout_rxl = 0;
1146
1147 nl->csr1.rxl = rxl_tab[ nl->cur_rxl_index ];
1148 inb( dev->base_addr + CSR0 );
1149 outb( *(unsigned char *)&nl->csr1, dev->base_addr + CSR1 );
1150
1151 nl->prev_rxl_rcvd = nl->cur_rxl_rcvd;
1152 nl->cur_rxl_rcvd = 0;
1153 }
1154
1155 /* -------------------------------------------------------------------------- */
1156
1157 /*
1158 * Open/initialize the board.
1159 */
1160
1161 static int
1162 sbni_open( struct net_device *dev )
1163 {
1164 struct net_local *nl = netdev_priv(dev);
1165 struct timer_list *w = &nl->watchdog;
1166
1167 /*
1168 * For double ISA adapters within "common irq" mode, we have to
1169 * determine whether primary or secondary channel is initialized,
1170 * and set the irq handler only in first case.
1171 */
1172 if( dev->base_addr < 0x400 ) { /* ISA only */
1173 struct net_device **p = sbni_cards;
1174 for( ; *p && p < sbni_cards + SBNI_MAX_NUM_CARDS; ++p )
1175 if( (*p)->irq == dev->irq &&
1176 ((*p)->base_addr == dev->base_addr + 4 ||
1177 (*p)->base_addr == dev->base_addr - 4) &&
1178 (*p)->flags & IFF_UP ) {
1179
1180 ((struct net_local *) (netdev_priv(*p)))
1181 ->second = dev;
1182 printk( KERN_NOTICE "%s: using shared irq "
1183 "with %s\n", dev->name, (*p)->name );
1184 nl->state |= FL_SECONDARY;
1185 goto handler_attached;
1186 }
1187 }
1188
1189 if( request_irq(dev->irq, sbni_interrupt, IRQF_SHARED, dev->name, dev) ) {
1190 printk( KERN_ERR "%s: unable to get IRQ %d.\n",
1191 dev->name, dev->irq );
1192 return -EAGAIN;
1193 }
1194
1195 handler_attached:
1196
1197 spin_lock( &nl->lock );
1198 memset( &dev->stats, 0, sizeof(struct net_device_stats) );
1199 memset( &nl->in_stats, 0, sizeof(struct sbni_in_stats) );
1200
1201 card_start( dev );
1202
1203 netif_start_queue( dev );
1204
1205 /* set timer watchdog */
1206 init_timer( w );
1207 w->expires = jiffies + SBNI_TIMEOUT;
1208 w->data = (unsigned long) dev;
1209 w->function = sbni_watchdog;
1210 add_timer( w );
1211
1212 spin_unlock( &nl->lock );
1213 return 0;
1214 }
1215
1216
1217 static int
1218 sbni_close( struct net_device *dev )
1219 {
1220 struct net_local *nl = netdev_priv(dev);
1221
1222 if( nl->second && nl->second->flags & IFF_UP ) {
1223 printk( KERN_NOTICE "Secondary channel (%s) is active!\n",
1224 nl->second->name );
1225 return -EBUSY;
1226 }
1227
1228 #ifdef CONFIG_SBNI_MULTILINE
1229 if( nl->state & FL_SLAVE )
1230 emancipate( dev );
1231 else
1232 while( nl->link ) /* it's master device! */
1233 emancipate( nl->link );
1234 #endif
1235
1236 spin_lock( &nl->lock );
1237
1238 nl->second = NULL;
1239 drop_xmit_queue( dev );
1240 netif_stop_queue( dev );
1241
1242 del_timer( &nl->watchdog );
1243
1244 outb( 0, dev->base_addr + CSR0 );
1245
1246 if( !(nl->state & FL_SECONDARY) )
1247 free_irq( dev->irq, dev );
1248 nl->state &= FL_SECONDARY;
1249
1250 spin_unlock( &nl->lock );
1251 return 0;
1252 }
1253
1254
1255 /*
1256 Valid combinations in CSR0 (for probing):
1257
1258 VALID_DECODER 0000,0011,1011,1010
1259
1260 ; 0 ; -
1261 TR_REQ ; 1 ; +
1262 TR_RDY ; 2 ; -
1263 TR_RDY TR_REQ ; 3 ; +
1264 BU_EMP ; 4 ; +
1265 BU_EMP TR_REQ ; 5 ; +
1266 BU_EMP TR_RDY ; 6 ; -
1267 BU_EMP TR_RDY TR_REQ ; 7 ; +
1268 RC_RDY ; 8 ; +
1269 RC_RDY TR_REQ ; 9 ; +
1270 RC_RDY TR_RDY ; 10 ; -
1271 RC_RDY TR_RDY TR_REQ ; 11 ; -
1272 RC_RDY BU_EMP ; 12 ; -
1273 RC_RDY BU_EMP TR_REQ ; 13 ; -
1274 RC_RDY BU_EMP TR_RDY ; 14 ; -
1275 RC_RDY BU_EMP TR_RDY TR_REQ ; 15 ; -
1276 */
1277
1278 #define VALID_DECODER (2 + 8 + 0x10 + 0x20 + 0x80 + 0x100 + 0x200)
1279
1280
1281 static int
1282 sbni_card_probe( unsigned long ioaddr )
1283 {
1284 unsigned char csr0;
1285
1286 csr0 = inb( ioaddr + CSR0 );
1287 if( csr0 != 0xff && csr0 != 0x00 ) {
1288 csr0 &= ~EN_INT;
1289 if( csr0 & BU_EMP )
1290 csr0 |= EN_INT;
1291
1292 if( VALID_DECODER & (1 << (csr0 >> 4)) )
1293 return 0;
1294 }
1295
1296 return -ENODEV;
1297 }
1298
1299 /* -------------------------------------------------------------------------- */
1300
1301 static int
1302 sbni_ioctl( struct net_device *dev, struct ifreq *ifr, int cmd )
1303 {
1304 struct net_local *nl = netdev_priv(dev);
1305 struct sbni_flags flags;
1306 int error = 0;
1307
1308 #ifdef CONFIG_SBNI_MULTILINE
1309 struct net_device *slave_dev;
1310 char slave_name[ 8 ];
1311 #endif
1312
1313 switch( cmd ) {
1314 case SIOCDEVGETINSTATS :
1315 if (copy_to_user( ifr->ifr_data, &nl->in_stats,
1316 sizeof(struct sbni_in_stats) ))
1317 error = -EFAULT;
1318 break;
1319
1320 case SIOCDEVRESINSTATS :
1321 if (!capable(CAP_NET_ADMIN))
1322 return -EPERM;
1323 memset( &nl->in_stats, 0, sizeof(struct sbni_in_stats) );
1324 break;
1325
1326 case SIOCDEVGHWSTATE :
1327 flags.mac_addr = *(u32 *)(dev->dev_addr + 3);
1328 flags.rate = nl->csr1.rate;
1329 flags.slow_mode = (nl->state & FL_SLOW_MODE) != 0;
1330 flags.rxl = nl->cur_rxl_index;
1331 flags.fixed_rxl = nl->delta_rxl == 0;
1332
1333 if (copy_to_user( ifr->ifr_data, &flags, sizeof flags ))
1334 error = -EFAULT;
1335 break;
1336
1337 case SIOCDEVSHWSTATE :
1338 if (!capable(CAP_NET_ADMIN))
1339 return -EPERM;
1340
1341 spin_lock( &nl->lock );
1342 flags = *(struct sbni_flags*) &ifr->ifr_ifru;
1343 if( flags.fixed_rxl )
1344 nl->delta_rxl = 0,
1345 nl->cur_rxl_index = flags.rxl;
1346 else
1347 nl->delta_rxl = DEF_RXL_DELTA,
1348 nl->cur_rxl_index = DEF_RXL;
1349
1350 nl->csr1.rxl = rxl_tab[ nl->cur_rxl_index ];
1351 nl->csr1.rate = flags.rate;
1352 outb( *(u8 *)&nl->csr1 | PR_RES, dev->base_addr + CSR1 );
1353 spin_unlock( &nl->lock );
1354 break;
1355
1356 #ifdef CONFIG_SBNI_MULTILINE
1357
1358 case SIOCDEVENSLAVE :
1359 if (!capable(CAP_NET_ADMIN))
1360 return -EPERM;
1361
1362 if (copy_from_user( slave_name, ifr->ifr_data, sizeof slave_name ))
1363 return -EFAULT;
1364 slave_dev = dev_get_by_name(&init_net, slave_name );
1365 if( !slave_dev || !(slave_dev->flags & IFF_UP) ) {
1366 printk( KERN_ERR "%s: trying to enslave non-active "
1367 "device %s\n", dev->name, slave_name );
1368 return -EPERM;
1369 }
1370
1371 return enslave( dev, slave_dev );
1372
1373 case SIOCDEVEMANSIPATE :
1374 if (!capable(CAP_NET_ADMIN))
1375 return -EPERM;
1376
1377 return emancipate( dev );
1378
1379 #endif /* CONFIG_SBNI_MULTILINE */
1380
1381 default :
1382 return -EOPNOTSUPP;
1383 }
1384
1385 return error;
1386 }
1387
1388
1389 #ifdef CONFIG_SBNI_MULTILINE
1390
1391 static int
1392 enslave( struct net_device *dev, struct net_device *slave_dev )
1393 {
1394 struct net_local *nl = netdev_priv(dev);
1395 struct net_local *snl = netdev_priv(slave_dev);
1396
1397 if( nl->state & FL_SLAVE ) /* This isn't master or free device */
1398 return -EBUSY;
1399
1400 if( snl->state & FL_SLAVE ) /* That was already enslaved */
1401 return -EBUSY;
1402
1403 spin_lock( &nl->lock );
1404 spin_lock( &snl->lock );
1405
1406 /* append to list */
1407 snl->link = nl->link;
1408 nl->link = slave_dev;
1409 snl->master = dev;
1410 snl->state |= FL_SLAVE;
1411
1412 /* Summary statistics of MultiLine operation will be stored
1413 in master's counters */
1414 memset( &slave_dev->stats, 0, sizeof(struct net_device_stats) );
1415 netif_stop_queue( slave_dev );
1416 netif_wake_queue( dev ); /* Now we are able to transmit */
1417
1418 spin_unlock( &snl->lock );
1419 spin_unlock( &nl->lock );
1420 printk( KERN_NOTICE "%s: slave device (%s) attached.\n",
1421 dev->name, slave_dev->name );
1422 return 0;
1423 }
1424
1425
1426 static int
1427 emancipate( struct net_device *dev )
1428 {
1429 struct net_local *snl = netdev_priv(dev);
1430 struct net_device *p = snl->master;
1431 struct net_local *nl = netdev_priv(p);
1432
1433 if( !(snl->state & FL_SLAVE) )
1434 return -EINVAL;
1435
1436 spin_lock( &nl->lock );
1437 spin_lock( &snl->lock );
1438 drop_xmit_queue( dev );
1439
1440 /* exclude from list */
1441 for(;;) { /* must be in list */
1442 struct net_local *t = netdev_priv(p);
1443 if( t->link == dev ) {
1444 t->link = snl->link;
1445 break;
1446 }
1447 p = t->link;
1448 }
1449
1450 snl->link = NULL;
1451 snl->master = dev;
1452 snl->state &= ~FL_SLAVE;
1453
1454 netif_start_queue( dev );
1455
1456 spin_unlock( &snl->lock );
1457 spin_unlock( &nl->lock );
1458
1459 dev_put( dev );
1460 return 0;
1461 }
1462
1463 #endif
1464
1465 static void
1466 set_multicast_list( struct net_device *dev )
1467 {
1468 return; /* sbni always operate in promiscuos mode */
1469 }
1470
1471
1472 #ifdef MODULE
1473 module_param_array(io, int, NULL, 0);
1474 module_param_array(irq, int, NULL, 0);
1475 module_param_array(baud, int, NULL, 0);
1476 module_param_array(rxl, int, NULL, 0);
1477 module_param_array(mac, int, NULL, 0);
1478 module_param(skip_pci_probe, bool, 0);
1479
1480 MODULE_LICENSE("GPL");
1481
1482
1483 int __init init_module( void )
1484 {
1485 struct net_device *dev;
1486 int err;
1487
1488 while( num < SBNI_MAX_NUM_CARDS ) {
1489 dev = alloc_netdev(sizeof(struct net_local),
1490 "sbni%d", sbni_devsetup);
1491 if( !dev)
1492 break;
1493
1494 sprintf( dev->name, "sbni%d", num );
1495
1496 err = sbni_init(dev);
1497 if (err) {
1498 free_netdev(dev);
1499 break;
1500 }
1501
1502 if( register_netdev( dev ) ) {
1503 release_region( dev->base_addr, SBNI_IO_EXTENT );
1504 free_netdev( dev );
1505 break;
1506 }
1507 }
1508
1509 return *sbni_cards ? 0 : -ENODEV;
1510 }
1511
1512 void
1513 cleanup_module(void)
1514 {
1515 int i;
1516
1517 for (i = 0; i < SBNI_MAX_NUM_CARDS; ++i) {
1518 struct net_device *dev = sbni_cards[i];
1519 if (dev != NULL) {
1520 unregister_netdev(dev);
1521 release_region(dev->base_addr, SBNI_IO_EXTENT);
1522 free_netdev(dev);
1523 }
1524 }
1525 }
1526
1527 #else /* MODULE */
1528
1529 static int __init
1530 sbni_setup( char *p )
1531 {
1532 int n, parm;
1533
1534 if( *p++ != '(' )
1535 goto bad_param;
1536
1537 for( n = 0, parm = 0; *p && n < 8; ) {
1538 (*dest[ parm ])[ n ] = simple_strtol( p, &p, 0 );
1539 if( !*p || *p == ')' )
1540 return 1;
1541 if( *p == ';' )
1542 ++p, ++n, parm = 0;
1543 else if( *p++ != ',' )
1544 break;
1545 else
1546 if( ++parm >= 5 )
1547 break;
1548 }
1549 bad_param:
1550 printk( KERN_ERR "Error in sbni kernel parameter!\n" );
1551 return 0;
1552 }
1553
1554 __setup( "sbni=", sbni_setup );
1555
1556 #endif /* MODULE */
1557
1558 /* -------------------------------------------------------------------------- */
1559
1560 #ifdef ASM_CRC
1561
1562 static u32
1563 calc_crc32( u32 crc, u8 *p, u32 len )
1564 {
1565 register u32 _crc;
1566 _crc = crc;
1567
1568 __asm__ __volatile__ (
1569 "xorl %%ebx, %%ebx\n"
1570 "movl %2, %%esi\n"
1571 "movl %3, %%ecx\n"
1572 "movl $crc32tab, %%edi\n"
1573 "shrl $2, %%ecx\n"
1574 "jz 1f\n"
1575
1576 ".align 4\n"
1577 "0:\n"
1578 "movb %%al, %%bl\n"
1579 "movl (%%esi), %%edx\n"
1580 "shrl $8, %%eax\n"
1581 "xorb %%dl, %%bl\n"
1582 "shrl $8, %%edx\n"
1583 "xorl (%%edi,%%ebx,4), %%eax\n"
1584
1585 "movb %%al, %%bl\n"
1586 "shrl $8, %%eax\n"
1587 "xorb %%dl, %%bl\n"
1588 "shrl $8, %%edx\n"
1589 "xorl (%%edi,%%ebx,4), %%eax\n"
1590
1591 "movb %%al, %%bl\n"
1592 "shrl $8, %%eax\n"
1593 "xorb %%dl, %%bl\n"
1594 "movb %%dh, %%dl\n"
1595 "xorl (%%edi,%%ebx,4), %%eax\n"
1596
1597 "movb %%al, %%bl\n"
1598 "shrl $8, %%eax\n"
1599 "xorb %%dl, %%bl\n"
1600 "addl $4, %%esi\n"
1601 "xorl (%%edi,%%ebx,4), %%eax\n"
1602
1603 "decl %%ecx\n"
1604 "jnz 0b\n"
1605
1606 "1:\n"
1607 "movl %3, %%ecx\n"
1608 "andl $3, %%ecx\n"
1609 "jz 2f\n"
1610
1611 "movb %%al, %%bl\n"
1612 "shrl $8, %%eax\n"
1613 "xorb (%%esi), %%bl\n"
1614 "xorl (%%edi,%%ebx,4), %%eax\n"
1615
1616 "decl %%ecx\n"
1617 "jz 2f\n"
1618
1619 "movb %%al, %%bl\n"
1620 "shrl $8, %%eax\n"
1621 "xorb 1(%%esi), %%bl\n"
1622 "xorl (%%edi,%%ebx,4), %%eax\n"
1623
1624 "decl %%ecx\n"
1625 "jz 2f\n"
1626
1627 "movb %%al, %%bl\n"
1628 "shrl $8, %%eax\n"
1629 "xorb 2(%%esi), %%bl\n"
1630 "xorl (%%edi,%%ebx,4), %%eax\n"
1631 "2:\n"
1632 : "=a" (_crc)
1633 : "0" (_crc), "g" (p), "g" (len)
1634 : "bx", "cx", "dx", "si", "di"
1635 );
1636
1637 return _crc;
1638 }
1639
1640 #else /* ASM_CRC */
1641
1642 static u32
1643 calc_crc32( u32 crc, u8 *p, u32 len )
1644 {
1645 while( len-- )
1646 crc = CRC32( *p++, crc );
1647
1648 return crc;
1649 }
1650
1651 #endif /* ASM_CRC */
1652
1653
1654 static u32 crc32tab[] __attribute__ ((aligned(8))) = {
1655 0xD202EF8D, 0xA505DF1B, 0x3C0C8EA1, 0x4B0BBE37,
1656 0xD56F2B94, 0xA2681B02, 0x3B614AB8, 0x4C667A2E,
1657 0xDCD967BF, 0xABDE5729, 0x32D70693, 0x45D03605,
1658 0xDBB4A3A6, 0xACB39330, 0x35BAC28A, 0x42BDF21C,
1659 0xCFB5FFE9, 0xB8B2CF7F, 0x21BB9EC5, 0x56BCAE53,
1660 0xC8D83BF0, 0xBFDF0B66, 0x26D65ADC, 0x51D16A4A,
1661 0xC16E77DB, 0xB669474D, 0x2F6016F7, 0x58672661,
1662 0xC603B3C2, 0xB1048354, 0x280DD2EE, 0x5F0AE278,
1663 0xE96CCF45, 0x9E6BFFD3, 0x0762AE69, 0x70659EFF,
1664 0xEE010B5C, 0x99063BCA, 0x000F6A70, 0x77085AE6,
1665 0xE7B74777, 0x90B077E1, 0x09B9265B, 0x7EBE16CD,
1666 0xE0DA836E, 0x97DDB3F8, 0x0ED4E242, 0x79D3D2D4,
1667 0xF4DBDF21, 0x83DCEFB7, 0x1AD5BE0D, 0x6DD28E9B,
1668 0xF3B61B38, 0x84B12BAE, 0x1DB87A14, 0x6ABF4A82,
1669 0xFA005713, 0x8D076785, 0x140E363F, 0x630906A9,
1670 0xFD6D930A, 0x8A6AA39C, 0x1363F226, 0x6464C2B0,
1671 0xA4DEAE1D, 0xD3D99E8B, 0x4AD0CF31, 0x3DD7FFA7,
1672 0xA3B36A04, 0xD4B45A92, 0x4DBD0B28, 0x3ABA3BBE,
1673 0xAA05262F, 0xDD0216B9, 0x440B4703, 0x330C7795,
1674 0xAD68E236, 0xDA6FD2A0, 0x4366831A, 0x3461B38C,
1675 0xB969BE79, 0xCE6E8EEF, 0x5767DF55, 0x2060EFC3,
1676 0xBE047A60, 0xC9034AF6, 0x500A1B4C, 0x270D2BDA,
1677 0xB7B2364B, 0xC0B506DD, 0x59BC5767, 0x2EBB67F1,
1678 0xB0DFF252, 0xC7D8C2C4, 0x5ED1937E, 0x29D6A3E8,
1679 0x9FB08ED5, 0xE8B7BE43, 0x71BEEFF9, 0x06B9DF6F,
1680 0x98DD4ACC, 0xEFDA7A5A, 0x76D32BE0, 0x01D41B76,
1681 0x916B06E7, 0xE66C3671, 0x7F6567CB, 0x0862575D,
1682 0x9606C2FE, 0xE101F268, 0x7808A3D2, 0x0F0F9344,
1683 0x82079EB1, 0xF500AE27, 0x6C09FF9D, 0x1B0ECF0B,
1684 0x856A5AA8, 0xF26D6A3E, 0x6B643B84, 0x1C630B12,
1685 0x8CDC1683, 0xFBDB2615, 0x62D277AF, 0x15D54739,
1686 0x8BB1D29A, 0xFCB6E20C, 0x65BFB3B6, 0x12B88320,
1687 0x3FBA6CAD, 0x48BD5C3B, 0xD1B40D81, 0xA6B33D17,
1688 0x38D7A8B4, 0x4FD09822, 0xD6D9C998, 0xA1DEF90E,
1689 0x3161E49F, 0x4666D409, 0xDF6F85B3, 0xA868B525,
1690 0x360C2086, 0x410B1010, 0xD80241AA, 0xAF05713C,
1691 0x220D7CC9, 0x550A4C5F, 0xCC031DE5, 0xBB042D73,
1692 0x2560B8D0, 0x52678846, 0xCB6ED9FC, 0xBC69E96A,
1693 0x2CD6F4FB, 0x5BD1C46D, 0xC2D895D7, 0xB5DFA541,
1694 0x2BBB30E2, 0x5CBC0074, 0xC5B551CE, 0xB2B26158,
1695 0x04D44C65, 0x73D37CF3, 0xEADA2D49, 0x9DDD1DDF,
1696 0x03B9887C, 0x74BEB8EA, 0xEDB7E950, 0x9AB0D9C6,
1697 0x0A0FC457, 0x7D08F4C1, 0xE401A57B, 0x930695ED,
1698 0x0D62004E, 0x7A6530D8, 0xE36C6162, 0x946B51F4,
1699 0x19635C01, 0x6E646C97, 0xF76D3D2D, 0x806A0DBB,
1700 0x1E0E9818, 0x6909A88E, 0xF000F934, 0x8707C9A2,
1701 0x17B8D433, 0x60BFE4A5, 0xF9B6B51F, 0x8EB18589,
1702 0x10D5102A, 0x67D220BC, 0xFEDB7106, 0x89DC4190,
1703 0x49662D3D, 0x3E611DAB, 0xA7684C11, 0xD06F7C87,
1704 0x4E0BE924, 0x390CD9B2, 0xA0058808, 0xD702B89E,
1705 0x47BDA50F, 0x30BA9599, 0xA9B3C423, 0xDEB4F4B5,
1706 0x40D06116, 0x37D75180, 0xAEDE003A, 0xD9D930AC,
1707 0x54D13D59, 0x23D60DCF, 0xBADF5C75, 0xCDD86CE3,
1708 0x53BCF940, 0x24BBC9D6, 0xBDB2986C, 0xCAB5A8FA,
1709 0x5A0AB56B, 0x2D0D85FD, 0xB404D447, 0xC303E4D1,
1710 0x5D677172, 0x2A6041E4, 0xB369105E, 0xC46E20C8,
1711 0x72080DF5, 0x050F3D63, 0x9C066CD9, 0xEB015C4F,
1712 0x7565C9EC, 0x0262F97A, 0x9B6BA8C0, 0xEC6C9856,
1713 0x7CD385C7, 0x0BD4B551, 0x92DDE4EB, 0xE5DAD47D,
1714 0x7BBE41DE, 0x0CB97148, 0x95B020F2, 0xE2B71064,
1715 0x6FBF1D91, 0x18B82D07, 0x81B17CBD, 0xF6B64C2B,
1716 0x68D2D988, 0x1FD5E91E, 0x86DCB8A4, 0xF1DB8832,
1717 0x616495A3, 0x1663A535, 0x8F6AF48F, 0xF86DC419,
1718 0x660951BA, 0x110E612C, 0x88073096, 0xFF000000
1719 };
1720