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1da177e4 LT |
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 | ||
1da177e4 LT |
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/slab.h> | |
47 | #include <linux/string.h> | |
48 | #include <linux/errno.h> | |
49 | #include <linux/netdevice.h> | |
50 | #include <linux/etherdevice.h> | |
51 | #include <linux/pci.h> | |
52 | #include <linux/skbuff.h> | |
53 | #include <linux/timer.h> | |
54 | #include <linux/init.h> | |
55 | #include <linux/delay.h> | |
56 | ||
881d966b | 57 | #include <net/net_namespace.h> |
1da177e4 LT |
58 | #include <net/arp.h> |
59 | ||
60 | #include <asm/io.h> | |
61 | #include <asm/types.h> | |
62 | #include <asm/byteorder.h> | |
63 | #include <asm/irq.h> | |
64 | #include <asm/uaccess.h> | |
65 | ||
66 | #include "sbni.h" | |
67 | ||
68 | /* device private data */ | |
69 | ||
70 | struct net_local { | |
71 | struct net_device_stats stats; | |
72 | struct timer_list watchdog; | |
73 | ||
74 | spinlock_t lock; | |
75 | struct sk_buff *rx_buf_p; /* receive buffer ptr */ | |
76 | struct sk_buff *tx_buf_p; /* transmit buffer ptr */ | |
77 | ||
78 | unsigned int framelen; /* current frame length */ | |
79 | unsigned int maxframe; /* maximum valid frame length */ | |
80 | unsigned int state; | |
81 | unsigned int inppos, outpos; /* positions in rx/tx buffers */ | |
82 | ||
83 | /* transmitting frame number - from frames qty to 1 */ | |
84 | unsigned int tx_frameno; | |
85 | ||
86 | /* expected number of next receiving frame */ | |
87 | unsigned int wait_frameno; | |
88 | ||
89 | /* count of failed attempts to frame send - 32 attempts do before | |
90 | error - while receiver tunes on opposite side of wire */ | |
91 | unsigned int trans_errors; | |
92 | ||
93 | /* idle time; send pong when limit exceeded */ | |
94 | unsigned int timer_ticks; | |
95 | ||
96 | /* fields used for receive level autoselection */ | |
97 | int delta_rxl; | |
98 | unsigned int cur_rxl_index, timeout_rxl; | |
99 | unsigned long cur_rxl_rcvd, prev_rxl_rcvd; | |
100 | ||
101 | struct sbni_csr1 csr1; /* current value of CSR1 */ | |
102 | struct sbni_in_stats in_stats; /* internal statistics */ | |
103 | ||
104 | struct net_device *second; /* for ISA/dual cards */ | |
105 | ||
106 | #ifdef CONFIG_SBNI_MULTILINE | |
107 | struct net_device *master; | |
108 | struct net_device *link; | |
109 | #endif | |
110 | }; | |
111 | ||
112 | ||
113 | static int sbni_card_probe( unsigned long ); | |
114 | static int sbni_pci_probe( struct net_device * ); | |
115 | static struct net_device *sbni_probe1(struct net_device *, unsigned long, int); | |
116 | static int sbni_open( struct net_device * ); | |
117 | static int sbni_close( struct net_device * ); | |
118 | static int sbni_start_xmit( struct sk_buff *, struct net_device * ); | |
119 | static int sbni_ioctl( struct net_device *, struct ifreq *, int ); | |
120 | static struct net_device_stats *sbni_get_stats( struct net_device * ); | |
121 | static void set_multicast_list( struct net_device * ); | |
122 | ||
7d12e780 | 123 | static irqreturn_t sbni_interrupt( int, void * ); |
1da177e4 LT |
124 | static void handle_channel( struct net_device * ); |
125 | static int recv_frame( struct net_device * ); | |
126 | static void send_frame( struct net_device * ); | |
127 | static int upload_data( struct net_device *, | |
128 | unsigned, unsigned, unsigned, u32 ); | |
129 | static void download_data( struct net_device *, u32 * ); | |
130 | static void sbni_watchdog( unsigned long ); | |
131 | static void interpret_ack( struct net_device *, unsigned ); | |
132 | static int append_frame_to_pkt( struct net_device *, unsigned, u32 ); | |
133 | static void indicate_pkt( struct net_device * ); | |
134 | static void card_start( struct net_device * ); | |
135 | static void prepare_to_send( struct sk_buff *, struct net_device * ); | |
136 | static void drop_xmit_queue( struct net_device * ); | |
137 | static void send_frame_header( struct net_device *, u32 * ); | |
138 | static int skip_tail( unsigned int, unsigned int, u32 ); | |
139 | static int check_fhdr( u32, u32 *, u32 *, u32 *, u32 *, u32 * ); | |
140 | static void change_level( struct net_device * ); | |
141 | static void timeout_change_level( struct net_device * ); | |
142 | static u32 calc_crc32( u32, u8 *, u32 ); | |
143 | static struct sk_buff * get_rx_buf( struct net_device * ); | |
144 | static int sbni_init( struct net_device * ); | |
145 | ||
146 | #ifdef CONFIG_SBNI_MULTILINE | |
147 | static int enslave( struct net_device *, struct net_device * ); | |
148 | static int emancipate( struct net_device * ); | |
149 | #endif | |
150 | ||
151 | #ifdef __i386__ | |
152 | #define ASM_CRC 1 | |
153 | #endif | |
154 | ||
155 | static const char version[] = | |
156 | "Granch SBNI12 driver ver 5.0.1 Jun 22 2001 Denis I.Timofeev.\n"; | |
157 | ||
158 | static int skip_pci_probe __initdata = 0; | |
159 | static int scandone __initdata = 0; | |
160 | static int num __initdata = 0; | |
161 | ||
162 | static unsigned char rxl_tab[]; | |
163 | static u32 crc32tab[]; | |
164 | ||
165 | /* A list of all installed devices, for removing the driver module. */ | |
166 | static struct net_device *sbni_cards[ SBNI_MAX_NUM_CARDS ]; | |
167 | ||
168 | /* Lists of device's parameters */ | |
169 | static u32 io[ SBNI_MAX_NUM_CARDS ] __initdata = | |
170 | { [0 ... SBNI_MAX_NUM_CARDS-1] = -1 }; | |
171 | static u32 irq[ SBNI_MAX_NUM_CARDS ] __initdata; | |
172 | static u32 baud[ SBNI_MAX_NUM_CARDS ] __initdata; | |
173 | static u32 rxl[ SBNI_MAX_NUM_CARDS ] __initdata = | |
174 | { [0 ... SBNI_MAX_NUM_CARDS-1] = -1 }; | |
175 | static u32 mac[ SBNI_MAX_NUM_CARDS ] __initdata; | |
176 | ||
177 | #ifndef MODULE | |
178 | typedef u32 iarr[]; | |
179 | static iarr __initdata *dest[5] = { &io, &irq, &baud, &rxl, &mac }; | |
180 | #endif | |
181 | ||
182 | /* A zero-terminated list of I/O addresses to be probed on ISA bus */ | |
183 | static unsigned int netcard_portlist[ ] __initdata = { | |
184 | 0x210, 0x214, 0x220, 0x224, 0x230, 0x234, 0x240, 0x244, 0x250, 0x254, | |
185 | 0x260, 0x264, 0x270, 0x274, 0x280, 0x284, 0x290, 0x294, 0x2a0, 0x2a4, | |
186 | 0x2b0, 0x2b4, 0x2c0, 0x2c4, 0x2d0, 0x2d4, 0x2e0, 0x2e4, 0x2f0, 0x2f4, | |
187 | 0 }; | |
188 | ||
486bf8de | 189 | #define NET_LOCAL_LOCK(dev) (((struct net_local *)netdev_priv(dev))->lock) |
1da177e4 LT |
190 | |
191 | /* | |
192 | * Look for SBNI card which addr stored in dev->base_addr, if nonzero. | |
193 | * Otherwise, look through PCI bus. If none PCI-card was found, scan ISA. | |
194 | */ | |
195 | ||
196 | static inline int __init | |
197 | sbni_isa_probe( struct net_device *dev ) | |
198 | { | |
199 | if( dev->base_addr > 0x1ff | |
200 | && request_region( dev->base_addr, SBNI_IO_EXTENT, dev->name ) | |
201 | && sbni_probe1( dev, dev->base_addr, dev->irq ) ) | |
202 | ||
203 | return 0; | |
204 | else { | |
205 | printk( KERN_ERR "sbni: base address 0x%lx is busy, or adapter " | |
206 | "is malfunctional!\n", dev->base_addr ); | |
207 | return -ENODEV; | |
208 | } | |
209 | } | |
210 | ||
211 | static void __init sbni_devsetup(struct net_device *dev) | |
212 | { | |
213 | ether_setup( dev ); | |
214 | dev->open = &sbni_open; | |
215 | dev->stop = &sbni_close; | |
216 | dev->hard_start_xmit = &sbni_start_xmit; | |
217 | dev->get_stats = &sbni_get_stats; | |
218 | dev->set_multicast_list = &set_multicast_list; | |
219 | dev->do_ioctl = &sbni_ioctl; | |
1da177e4 LT |
220 | } |
221 | ||
222 | int __init sbni_probe(int unit) | |
223 | { | |
224 | struct net_device *dev; | |
225 | static unsigned version_printed __initdata = 0; | |
226 | int err; | |
227 | ||
228 | dev = alloc_netdev(sizeof(struct net_local), "sbni", sbni_devsetup); | |
229 | if (!dev) | |
230 | return -ENOMEM; | |
231 | ||
232 | sprintf(dev->name, "sbni%d", unit); | |
233 | netdev_boot_setup_check(dev); | |
234 | ||
235 | err = sbni_init(dev); | |
236 | if (err) { | |
237 | free_netdev(dev); | |
238 | return err; | |
239 | } | |
240 | ||
241 | err = register_netdev(dev); | |
242 | if (err) { | |
243 | release_region( dev->base_addr, SBNI_IO_EXTENT ); | |
244 | free_netdev(dev); | |
245 | return err; | |
246 | } | |
247 | if( version_printed++ == 0 ) | |
248 | printk( KERN_INFO "%s", version ); | |
249 | return 0; | |
250 | } | |
251 | ||
252 | static int __init sbni_init(struct net_device *dev) | |
253 | { | |
254 | int i; | |
255 | if( dev->base_addr ) | |
256 | return sbni_isa_probe( dev ); | |
257 | /* otherwise we have to perform search our adapter */ | |
258 | ||
259 | if( io[ num ] != -1 ) | |
260 | dev->base_addr = io[ num ], | |
261 | dev->irq = irq[ num ]; | |
262 | else if( scandone || io[ 0 ] != -1 ) | |
263 | return -ENODEV; | |
264 | ||
265 | /* if io[ num ] contains non-zero address, then that is on ISA bus */ | |
266 | if( dev->base_addr ) | |
267 | return sbni_isa_probe( dev ); | |
268 | ||
269 | /* ...otherwise - scan PCI first */ | |
270 | if( !skip_pci_probe && !sbni_pci_probe( dev ) ) | |
271 | return 0; | |
272 | ||
273 | if( io[ num ] == -1 ) { | |
274 | /* Auto-scan will be stopped when first ISA card were found */ | |
275 | scandone = 1; | |
276 | if( num > 0 ) | |
277 | return -ENODEV; | |
278 | } | |
279 | ||
280 | for( i = 0; netcard_portlist[ i ]; ++i ) { | |
281 | int ioaddr = netcard_portlist[ i ]; | |
282 | if( request_region( ioaddr, SBNI_IO_EXTENT, dev->name ) | |
283 | && sbni_probe1( dev, ioaddr, 0 )) | |
284 | return 0; | |
285 | } | |
286 | ||
287 | return -ENODEV; | |
288 | } | |
289 | ||
290 | ||
486bf8de | 291 | static int __init |
1da177e4 LT |
292 | sbni_pci_probe( struct net_device *dev ) |
293 | { | |
294 | struct pci_dev *pdev = NULL; | |
295 | ||
296 | while( (pdev = pci_get_class( PCI_CLASS_NETWORK_OTHER << 8, pdev )) | |
297 | != NULL ) { | |
298 | int pci_irq_line; | |
299 | unsigned long pci_ioaddr; | |
300 | u16 subsys; | |
301 | ||
302 | if( pdev->vendor != SBNI_PCI_VENDOR | |
303 | && pdev->device != SBNI_PCI_DEVICE ) | |
304 | continue; | |
305 | ||
306 | pci_ioaddr = pci_resource_start( pdev, 0 ); | |
307 | pci_irq_line = pdev->irq; | |
308 | ||
309 | /* Avoid already found cards from previous calls */ | |
310 | if( !request_region( pci_ioaddr, SBNI_IO_EXTENT, dev->name ) ) { | |
311 | pci_read_config_word( pdev, PCI_SUBSYSTEM_ID, &subsys ); | |
312 | ||
313 | if (subsys != 2) | |
314 | continue; | |
315 | ||
316 | /* Dual adapter is present */ | |
317 | if (!request_region(pci_ioaddr += 4, SBNI_IO_EXTENT, | |
318 | dev->name ) ) | |
319 | continue; | |
320 | } | |
321 | ||
60e4ad7a | 322 | if (pci_irq_line <= 0 || pci_irq_line >= nr_irqs) |
1da177e4 LT |
323 | printk( KERN_WARNING " WARNING: The PCI BIOS assigned " |
324 | "this PCI card to IRQ %d, which is unlikely " | |
325 | "to work!.\n" | |
326 | KERN_WARNING " You should use the PCI BIOS " | |
327 | "setup to assign a valid IRQ line.\n", | |
328 | pci_irq_line ); | |
329 | ||
330 | /* avoiding re-enable dual adapters */ | |
331 | if( (pci_ioaddr & 7) == 0 && pci_enable_device( pdev ) ) { | |
332 | release_region( pci_ioaddr, SBNI_IO_EXTENT ); | |
333 | pci_dev_put( pdev ); | |
334 | return -EIO; | |
335 | } | |
336 | if( sbni_probe1( dev, pci_ioaddr, pci_irq_line ) ) { | |
337 | SET_NETDEV_DEV(dev, &pdev->dev); | |
338 | /* not the best thing to do, but this is all messed up | |
339 | for hotplug systems anyway... */ | |
340 | pci_dev_put( pdev ); | |
341 | return 0; | |
342 | } | |
343 | } | |
344 | return -ENODEV; | |
345 | } | |
346 | ||
347 | ||
348 | static struct net_device * __init | |
349 | sbni_probe1( struct net_device *dev, unsigned long ioaddr, int irq ) | |
350 | { | |
351 | struct net_local *nl; | |
352 | ||
353 | if( sbni_card_probe( ioaddr ) ) { | |
354 | release_region( ioaddr, SBNI_IO_EXTENT ); | |
355 | return NULL; | |
356 | } | |
357 | ||
358 | outb( 0, ioaddr + CSR0 ); | |
359 | ||
360 | if( irq < 2 ) { | |
361 | unsigned long irq_mask; | |
362 | ||
363 | irq_mask = probe_irq_on(); | |
364 | outb( EN_INT | TR_REQ, ioaddr + CSR0 ); | |
365 | outb( PR_RES, ioaddr + CSR1 ); | |
366 | mdelay(50); | |
367 | irq = probe_irq_off(irq_mask); | |
368 | outb( 0, ioaddr + CSR0 ); | |
369 | ||
370 | if( !irq ) { | |
371 | printk( KERN_ERR "%s: can't detect device irq!\n", | |
372 | dev->name ); | |
373 | release_region( ioaddr, SBNI_IO_EXTENT ); | |
374 | return NULL; | |
375 | } | |
376 | } else if( irq == 2 ) | |
377 | irq = 9; | |
378 | ||
379 | dev->irq = irq; | |
380 | dev->base_addr = ioaddr; | |
381 | ||
486bf8de WC |
382 | /* Fill in sbni-specific dev fields. */ |
383 | nl = netdev_priv(dev); | |
1da177e4 LT |
384 | if( !nl ) { |
385 | printk( KERN_ERR "%s: unable to get memory!\n", dev->name ); | |
386 | release_region( ioaddr, SBNI_IO_EXTENT ); | |
387 | return NULL; | |
388 | } | |
389 | ||
1da177e4 LT |
390 | memset( nl, 0, sizeof(struct net_local) ); |
391 | spin_lock_init( &nl->lock ); | |
392 | ||
393 | /* store MAC address (generate if that isn't known) */ | |
90458401 AV |
394 | *(__be16 *)dev->dev_addr = htons( 0x00ff ); |
395 | *(__be32 *)(dev->dev_addr + 2) = htonl( 0x01000000 | | |
486bf8de WC |
396 | ((mac[num] ? |
397 | mac[num] : | |
398 | (u32)((long)netdev_priv(dev))) & 0x00ffffff)); | |
1da177e4 LT |
399 | |
400 | /* store link settings (speed, receive level ) */ | |
401 | nl->maxframe = DEFAULT_FRAME_LEN; | |
402 | nl->csr1.rate = baud[ num ]; | |
403 | ||
404 | if( (nl->cur_rxl_index = rxl[ num ]) == -1 ) | |
405 | /* autotune rxl */ | |
406 | nl->cur_rxl_index = DEF_RXL, | |
407 | nl->delta_rxl = DEF_RXL_DELTA; | |
408 | else | |
409 | nl->delta_rxl = 0; | |
410 | nl->csr1.rxl = rxl_tab[ nl->cur_rxl_index ]; | |
411 | if( inb( ioaddr + CSR0 ) & 0x01 ) | |
412 | nl->state |= FL_SLOW_MODE; | |
413 | ||
414 | printk( KERN_NOTICE "%s: ioaddr %#lx, irq %d, " | |
415 | "MAC: 00:ff:01:%02x:%02x:%02x\n", | |
416 | dev->name, dev->base_addr, dev->irq, | |
417 | ((u8 *) dev->dev_addr) [3], | |
418 | ((u8 *) dev->dev_addr) [4], | |
419 | ((u8 *) dev->dev_addr) [5] ); | |
420 | ||
421 | printk( KERN_NOTICE "%s: speed %d, receive level ", dev->name, | |
422 | ( (nl->state & FL_SLOW_MODE) ? 500000 : 2000000) | |
423 | / (1 << nl->csr1.rate) ); | |
424 | ||
425 | if( nl->delta_rxl == 0 ) | |
426 | printk( "0x%x (fixed)\n", nl->cur_rxl_index ); | |
427 | else | |
428 | printk( "(auto)\n"); | |
429 | ||
430 | #ifdef CONFIG_SBNI_MULTILINE | |
431 | nl->master = dev; | |
432 | nl->link = NULL; | |
433 | #endif | |
434 | ||
435 | sbni_cards[ num++ ] = dev; | |
436 | return dev; | |
437 | } | |
438 | ||
439 | /* -------------------------------------------------------------------------- */ | |
440 | ||
441 | #ifdef CONFIG_SBNI_MULTILINE | |
442 | ||
443 | static int | |
444 | sbni_start_xmit( struct sk_buff *skb, struct net_device *dev ) | |
445 | { | |
446 | struct net_device *p; | |
447 | ||
448 | netif_stop_queue( dev ); | |
449 | ||
450 | /* Looking for idle device in the list */ | |
451 | for( p = dev; p; ) { | |
486bf8de | 452 | struct net_local *nl = netdev_priv(p); |
1da177e4 LT |
453 | spin_lock( &nl->lock ); |
454 | if( nl->tx_buf_p || (nl->state & FL_LINE_DOWN) ) { | |
455 | p = nl->link; | |
456 | spin_unlock( &nl->lock ); | |
457 | } else { | |
458 | /* Idle dev is found */ | |
459 | prepare_to_send( skb, p ); | |
460 | spin_unlock( &nl->lock ); | |
461 | netif_start_queue( dev ); | |
462 | return 0; | |
463 | } | |
464 | } | |
465 | ||
466 | return 1; | |
467 | } | |
468 | ||
469 | #else /* CONFIG_SBNI_MULTILINE */ | |
470 | ||
471 | static int | |
472 | sbni_start_xmit( struct sk_buff *skb, struct net_device *dev ) | |
473 | { | |
486bf8de | 474 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
475 | |
476 | netif_stop_queue( dev ); | |
477 | spin_lock( &nl->lock ); | |
478 | ||
479 | prepare_to_send( skb, dev ); | |
480 | ||
481 | spin_unlock( &nl->lock ); | |
482 | return 0; | |
483 | } | |
484 | ||
485 | #endif /* CONFIG_SBNI_MULTILINE */ | |
486 | ||
487 | /* -------------------------------------------------------------------------- */ | |
488 | ||
489 | /* interrupt handler */ | |
490 | ||
491 | /* | |
492 | * SBNI12D-10, -11/ISA boards within "common interrupt" mode could not | |
493 | * be looked as two independent single-channel devices. Every channel seems | |
494 | * as Ethernet interface but interrupt handler must be common. Really, first | |
495 | * channel ("master") driver only registers the handler. In its struct net_local | |
496 | * it has got pointer to "slave" channel's struct net_local and handles that's | |
497 | * interrupts too. | |
498 | * dev of successfully attached ISA SBNI boards is linked to list. | |
499 | * While next board driver is initialized, it scans this list. If one | |
500 | * has found dev with same irq and ioaddr different by 4 then it assumes | |
501 | * this board to be "master". | |
502 | */ | |
503 | ||
504 | static irqreturn_t | |
7d12e780 | 505 | sbni_interrupt( int irq, void *dev_id ) |
1da177e4 | 506 | { |
06efcad0 | 507 | struct net_device *dev = dev_id; |
486bf8de | 508 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
509 | int repeat; |
510 | ||
511 | spin_lock( &nl->lock ); | |
512 | if( nl->second ) | |
486bf8de | 513 | spin_lock(&NET_LOCAL_LOCK(nl->second)); |
1da177e4 LT |
514 | |
515 | do { | |
516 | repeat = 0; | |
517 | if( inb( dev->base_addr + CSR0 ) & (RC_RDY | TR_RDY) ) | |
518 | handle_channel( dev ), | |
519 | repeat = 1; | |
520 | if( nl->second && /* second channel present */ | |
521 | (inb( nl->second->base_addr+CSR0 ) & (RC_RDY | TR_RDY)) ) | |
522 | handle_channel( nl->second ), | |
523 | repeat = 1; | |
524 | } while( repeat ); | |
525 | ||
526 | if( nl->second ) | |
486bf8de | 527 | spin_unlock(&NET_LOCAL_LOCK(nl->second)); |
1da177e4 LT |
528 | spin_unlock( &nl->lock ); |
529 | return IRQ_HANDLED; | |
530 | } | |
531 | ||
532 | ||
533 | static void | |
534 | handle_channel( struct net_device *dev ) | |
535 | { | |
486bf8de | 536 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
537 | unsigned long ioaddr = dev->base_addr; |
538 | ||
539 | int req_ans; | |
540 | unsigned char csr0; | |
541 | ||
542 | #ifdef CONFIG_SBNI_MULTILINE | |
543 | /* Lock the master device because we going to change its local data */ | |
544 | if( nl->state & FL_SLAVE ) | |
486bf8de | 545 | spin_lock(&NET_LOCAL_LOCK(nl->master)); |
1da177e4 LT |
546 | #endif |
547 | ||
548 | outb( (inb( ioaddr + CSR0 ) & ~EN_INT) | TR_REQ, ioaddr + CSR0 ); | |
549 | ||
550 | nl->timer_ticks = CHANGE_LEVEL_START_TICKS; | |
551 | for(;;) { | |
552 | csr0 = inb( ioaddr + CSR0 ); | |
553 | if( ( csr0 & (RC_RDY | TR_RDY) ) == 0 ) | |
554 | break; | |
555 | ||
556 | req_ans = !(nl->state & FL_PREV_OK); | |
557 | ||
558 | if( csr0 & RC_RDY ) | |
559 | req_ans = recv_frame( dev ); | |
560 | ||
561 | /* | |
562 | * TR_RDY always equals 1 here because we have owned the marker, | |
563 | * and we set TR_REQ when disabled interrupts | |
564 | */ | |
565 | csr0 = inb( ioaddr + CSR0 ); | |
566 | if( !(csr0 & TR_RDY) || (csr0 & RC_RDY) ) | |
567 | printk( KERN_ERR "%s: internal error!\n", dev->name ); | |
568 | ||
569 | /* if state & FL_NEED_RESEND != 0 then tx_frameno != 0 */ | |
570 | if( req_ans || nl->tx_frameno != 0 ) | |
571 | send_frame( dev ); | |
572 | else | |
573 | /* send marker without any data */ | |
574 | outb( inb( ioaddr + CSR0 ) & ~TR_REQ, ioaddr + CSR0 ); | |
575 | } | |
576 | ||
577 | outb( inb( ioaddr + CSR0 ) | EN_INT, ioaddr + CSR0 ); | |
578 | ||
579 | #ifdef CONFIG_SBNI_MULTILINE | |
580 | if( nl->state & FL_SLAVE ) | |
486bf8de | 581 | spin_unlock(&NET_LOCAL_LOCK(nl->master)); |
1da177e4 LT |
582 | #endif |
583 | } | |
584 | ||
585 | ||
586 | /* | |
587 | * Routine returns 1 if it need to acknoweledge received frame. | |
588 | * Empty frame received without errors won't be acknoweledged. | |
589 | */ | |
590 | ||
591 | static int | |
592 | recv_frame( struct net_device *dev ) | |
593 | { | |
486bf8de | 594 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
595 | unsigned long ioaddr = dev->base_addr; |
596 | ||
597 | u32 crc = CRC32_INITIAL; | |
598 | ||
e5fb4f42 JG |
599 | unsigned framelen = 0, frameno, ack; |
600 | unsigned is_first, frame_ok = 0; | |
1da177e4 LT |
601 | |
602 | if( check_fhdr( ioaddr, &framelen, &frameno, &ack, &is_first, &crc ) ) { | |
603 | frame_ok = framelen > 4 | |
604 | ? upload_data( dev, framelen, frameno, is_first, crc ) | |
605 | : skip_tail( ioaddr, framelen, crc ); | |
606 | if( frame_ok ) | |
607 | interpret_ack( dev, ack ); | |
e5fb4f42 | 608 | } |
1da177e4 LT |
609 | |
610 | outb( inb( ioaddr + CSR0 ) ^ CT_ZER, ioaddr + CSR0 ); | |
611 | if( frame_ok ) { | |
612 | nl->state |= FL_PREV_OK; | |
613 | if( framelen > 4 ) | |
614 | nl->in_stats.all_rx_number++; | |
615 | } else | |
616 | nl->state &= ~FL_PREV_OK, | |
617 | change_level( dev ), | |
618 | nl->in_stats.all_rx_number++, | |
619 | nl->in_stats.bad_rx_number++; | |
620 | ||
621 | return !frame_ok || framelen > 4; | |
622 | } | |
623 | ||
624 | ||
625 | static void | |
626 | send_frame( struct net_device *dev ) | |
627 | { | |
486bf8de | 628 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
629 | |
630 | u32 crc = CRC32_INITIAL; | |
631 | ||
632 | if( nl->state & FL_NEED_RESEND ) { | |
633 | ||
634 | /* if frame was sended but not ACK'ed - resend it */ | |
635 | if( nl->trans_errors ) { | |
636 | --nl->trans_errors; | |
637 | if( nl->framelen != 0 ) | |
638 | nl->in_stats.resend_tx_number++; | |
639 | } else { | |
640 | /* cannot xmit with many attempts */ | |
641 | #ifdef CONFIG_SBNI_MULTILINE | |
642 | if( (nl->state & FL_SLAVE) || nl->link ) | |
643 | #endif | |
644 | nl->state |= FL_LINE_DOWN; | |
645 | drop_xmit_queue( dev ); | |
646 | goto do_send; | |
647 | } | |
648 | } else | |
649 | nl->trans_errors = TR_ERROR_COUNT; | |
650 | ||
651 | send_frame_header( dev, &crc ); | |
652 | nl->state |= FL_NEED_RESEND; | |
653 | /* | |
654 | * FL_NEED_RESEND will be cleared after ACK, but if empty | |
655 | * frame sended then in prepare_to_send next frame | |
656 | */ | |
657 | ||
658 | ||
659 | if( nl->framelen ) { | |
660 | download_data( dev, &crc ); | |
661 | nl->in_stats.all_tx_number++; | |
662 | nl->state |= FL_WAIT_ACK; | |
663 | } | |
664 | ||
665 | outsb( dev->base_addr + DAT, (u8 *)&crc, sizeof crc ); | |
666 | ||
667 | do_send: | |
668 | outb( inb( dev->base_addr + CSR0 ) & ~TR_REQ, dev->base_addr + CSR0 ); | |
669 | ||
670 | if( nl->tx_frameno ) | |
671 | /* next frame exists - we request card to send it */ | |
672 | outb( inb( dev->base_addr + CSR0 ) | TR_REQ, | |
673 | dev->base_addr + CSR0 ); | |
674 | } | |
675 | ||
676 | ||
677 | /* | |
678 | * Write the frame data into adapter's buffer memory, and calculate CRC. | |
679 | * Do padding if necessary. | |
680 | */ | |
681 | ||
682 | static void | |
683 | download_data( struct net_device *dev, u32 *crc_p ) | |
684 | { | |
486bf8de | 685 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
686 | struct sk_buff *skb = nl->tx_buf_p; |
687 | ||
688 | unsigned len = min_t(unsigned int, skb->len - nl->outpos, nl->framelen); | |
689 | ||
690 | outsb( dev->base_addr + DAT, skb->data + nl->outpos, len ); | |
691 | *crc_p = calc_crc32( *crc_p, skb->data + nl->outpos, len ); | |
692 | ||
693 | /* if packet too short we should write some more bytes to pad */ | |
694 | for( len = nl->framelen - len; len--; ) | |
695 | outb( 0, dev->base_addr + DAT ), | |
696 | *crc_p = CRC32( 0, *crc_p ); | |
697 | } | |
698 | ||
699 | ||
700 | static int | |
701 | upload_data( struct net_device *dev, unsigned framelen, unsigned frameno, | |
702 | unsigned is_first, u32 crc ) | |
703 | { | |
486bf8de | 704 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
705 | |
706 | int frame_ok; | |
707 | ||
708 | if( is_first ) | |
709 | nl->wait_frameno = frameno, | |
710 | nl->inppos = 0; | |
711 | ||
712 | if( nl->wait_frameno == frameno ) { | |
713 | ||
714 | if( nl->inppos + framelen <= ETHER_MAX_LEN ) | |
715 | frame_ok = append_frame_to_pkt( dev, framelen, crc ); | |
716 | ||
717 | /* | |
718 | * if CRC is right but framelen incorrect then transmitter | |
719 | * error was occurred... drop entire packet | |
720 | */ | |
721 | else if( (frame_ok = skip_tail( dev->base_addr, framelen, crc )) | |
722 | != 0 ) | |
723 | nl->wait_frameno = 0, | |
724 | nl->inppos = 0, | |
725 | #ifdef CONFIG_SBNI_MULTILINE | |
486bf8de | 726 | ((struct net_local *)netdev_priv(nl->master)) |
1da177e4 | 727 | ->stats.rx_errors++, |
486bf8de | 728 | ((struct net_local *)netdev_priv(nl->master)) |
1da177e4 LT |
729 | ->stats.rx_missed_errors++; |
730 | #else | |
731 | nl->stats.rx_errors++, | |
732 | nl->stats.rx_missed_errors++; | |
733 | #endif | |
734 | /* now skip all frames until is_first != 0 */ | |
735 | } else | |
736 | frame_ok = skip_tail( dev->base_addr, framelen, crc ); | |
737 | ||
738 | if( is_first && !frame_ok ) | |
739 | /* | |
740 | * Frame has been broken, but we had already stored | |
741 | * is_first... Drop entire packet. | |
742 | */ | |
743 | nl->wait_frameno = 0, | |
744 | #ifdef CONFIG_SBNI_MULTILINE | |
486bf8de WC |
745 | ((struct net_local *)netdev_priv(nl->master)) |
746 | ->stats.rx_errors++, | |
747 | ((struct net_local *)netdev_priv(nl->master)) | |
748 | ->stats.rx_crc_errors++; | |
1da177e4 LT |
749 | #else |
750 | nl->stats.rx_errors++, | |
751 | nl->stats.rx_crc_errors++; | |
752 | #endif | |
753 | ||
754 | return frame_ok; | |
755 | } | |
756 | ||
757 | ||
dfec7228 | 758 | static inline void |
1da177e4 LT |
759 | send_complete( struct net_local *nl ) |
760 | { | |
761 | #ifdef CONFIG_SBNI_MULTILINE | |
486bf8de WC |
762 | ((struct net_local *)netdev_priv(nl->master))->stats.tx_packets++; |
763 | ((struct net_local *)netdev_priv(nl->master))->stats.tx_bytes | |
1da177e4 LT |
764 | += nl->tx_buf_p->len; |
765 | #else | |
766 | nl->stats.tx_packets++; | |
767 | nl->stats.tx_bytes += nl->tx_buf_p->len; | |
768 | #endif | |
769 | dev_kfree_skb_irq( nl->tx_buf_p ); | |
770 | ||
771 | nl->tx_buf_p = NULL; | |
772 | ||
773 | nl->outpos = 0; | |
774 | nl->state &= ~(FL_WAIT_ACK | FL_NEED_RESEND); | |
775 | nl->framelen = 0; | |
776 | } | |
777 | ||
778 | ||
779 | static void | |
780 | interpret_ack( struct net_device *dev, unsigned ack ) | |
781 | { | |
486bf8de | 782 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
783 | |
784 | if( ack == FRAME_SENT_OK ) { | |
785 | nl->state &= ~FL_NEED_RESEND; | |
786 | ||
787 | if( nl->state & FL_WAIT_ACK ) { | |
788 | nl->outpos += nl->framelen; | |
789 | ||
790 | if( --nl->tx_frameno ) | |
791 | nl->framelen = min_t(unsigned int, | |
792 | nl->maxframe, | |
793 | nl->tx_buf_p->len - nl->outpos); | |
794 | else | |
795 | send_complete( nl ), | |
796 | #ifdef CONFIG_SBNI_MULTILINE | |
797 | netif_wake_queue( nl->master ); | |
798 | #else | |
799 | netif_wake_queue( dev ); | |
800 | #endif | |
801 | } | |
802 | } | |
803 | ||
804 | nl->state &= ~FL_WAIT_ACK; | |
805 | } | |
806 | ||
807 | ||
808 | /* | |
809 | * Glue received frame with previous fragments of packet. | |
810 | * Indicate packet when last frame would be accepted. | |
811 | */ | |
812 | ||
813 | static int | |
814 | append_frame_to_pkt( struct net_device *dev, unsigned framelen, u32 crc ) | |
815 | { | |
486bf8de | 816 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
817 | |
818 | u8 *p; | |
819 | ||
820 | if( nl->inppos + framelen > ETHER_MAX_LEN ) | |
821 | return 0; | |
822 | ||
823 | if( !nl->rx_buf_p && !(nl->rx_buf_p = get_rx_buf( dev )) ) | |
824 | return 0; | |
825 | ||
826 | p = nl->rx_buf_p->data + nl->inppos; | |
827 | insb( dev->base_addr + DAT, p, framelen ); | |
828 | if( calc_crc32( crc, p, framelen ) != CRC32_REMAINDER ) | |
829 | return 0; | |
830 | ||
831 | nl->inppos += framelen - 4; | |
832 | if( --nl->wait_frameno == 0 ) /* last frame received */ | |
833 | indicate_pkt( dev ); | |
834 | ||
835 | return 1; | |
836 | } | |
837 | ||
838 | ||
839 | /* | |
840 | * Prepare to start output on adapter. | |
841 | * Transmitter will be actually activated when marker is accepted. | |
842 | */ | |
843 | ||
844 | static void | |
845 | prepare_to_send( struct sk_buff *skb, struct net_device *dev ) | |
846 | { | |
486bf8de | 847 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
848 | |
849 | unsigned int len; | |
850 | ||
851 | /* nl->tx_buf_p == NULL here! */ | |
852 | if( nl->tx_buf_p ) | |
853 | printk( KERN_ERR "%s: memory leak!\n", dev->name ); | |
854 | ||
855 | nl->outpos = 0; | |
856 | nl->state &= ~(FL_WAIT_ACK | FL_NEED_RESEND); | |
857 | ||
858 | len = skb->len; | |
859 | if( len < SBNI_MIN_LEN ) | |
860 | len = SBNI_MIN_LEN; | |
861 | ||
862 | nl->tx_buf_p = skb; | |
bb55b327 | 863 | nl->tx_frameno = DIV_ROUND_UP(len, nl->maxframe); |
1da177e4 LT |
864 | nl->framelen = len < nl->maxframe ? len : nl->maxframe; |
865 | ||
866 | outb( inb( dev->base_addr + CSR0 ) | TR_REQ, dev->base_addr + CSR0 ); | |
867 | #ifdef CONFIG_SBNI_MULTILINE | |
868 | nl->master->trans_start = jiffies; | |
869 | #else | |
870 | dev->trans_start = jiffies; | |
871 | #endif | |
872 | } | |
873 | ||
874 | ||
875 | static void | |
876 | drop_xmit_queue( struct net_device *dev ) | |
877 | { | |
486bf8de | 878 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
879 | |
880 | if( nl->tx_buf_p ) | |
881 | dev_kfree_skb_any( nl->tx_buf_p ), | |
882 | nl->tx_buf_p = NULL, | |
883 | #ifdef CONFIG_SBNI_MULTILINE | |
486bf8de | 884 | ((struct net_local *)netdev_priv(nl->master)) |
1da177e4 | 885 | ->stats.tx_errors++, |
486bf8de | 886 | ((struct net_local *)netdev_priv(nl->master)) |
1da177e4 LT |
887 | ->stats.tx_carrier_errors++; |
888 | #else | |
889 | nl->stats.tx_errors++, | |
890 | nl->stats.tx_carrier_errors++; | |
891 | #endif | |
892 | ||
893 | nl->tx_frameno = 0; | |
894 | nl->framelen = 0; | |
895 | nl->outpos = 0; | |
896 | nl->state &= ~(FL_WAIT_ACK | FL_NEED_RESEND); | |
897 | #ifdef CONFIG_SBNI_MULTILINE | |
898 | netif_start_queue( nl->master ); | |
899 | nl->master->trans_start = jiffies; | |
900 | #else | |
901 | netif_start_queue( dev ); | |
902 | dev->trans_start = jiffies; | |
903 | #endif | |
904 | } | |
905 | ||
906 | ||
907 | static void | |
908 | send_frame_header( struct net_device *dev, u32 *crc_p ) | |
909 | { | |
486bf8de | 910 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
911 | |
912 | u32 crc = *crc_p; | |
913 | u32 len_field = nl->framelen + 6; /* CRC + frameno + reserved */ | |
914 | u8 value; | |
915 | ||
916 | if( nl->state & FL_NEED_RESEND ) | |
917 | len_field |= FRAME_RETRY; /* non-first attempt... */ | |
918 | ||
919 | if( nl->outpos == 0 ) | |
920 | len_field |= FRAME_FIRST; | |
921 | ||
922 | len_field |= (nl->state & FL_PREV_OK) ? FRAME_SENT_OK : FRAME_SENT_BAD; | |
923 | outb( SBNI_SIG, dev->base_addr + DAT ); | |
924 | ||
925 | value = (u8) len_field; | |
926 | outb( value, dev->base_addr + DAT ); | |
927 | crc = CRC32( value, crc ); | |
928 | value = (u8) (len_field >> 8); | |
929 | outb( value, dev->base_addr + DAT ); | |
930 | crc = CRC32( value, crc ); | |
931 | ||
932 | outb( nl->tx_frameno, dev->base_addr + DAT ); | |
933 | crc = CRC32( nl->tx_frameno, crc ); | |
934 | outb( 0, dev->base_addr + DAT ); | |
935 | crc = CRC32( 0, crc ); | |
936 | *crc_p = crc; | |
937 | } | |
938 | ||
939 | ||
940 | /* | |
941 | * if frame tail not needed (incorrect number or received twice), | |
942 | * it won't store, but CRC will be calculated | |
943 | */ | |
944 | ||
945 | static int | |
946 | skip_tail( unsigned int ioaddr, unsigned int tail_len, u32 crc ) | |
947 | { | |
948 | while( tail_len-- ) | |
949 | crc = CRC32( inb( ioaddr + DAT ), crc ); | |
950 | ||
951 | return crc == CRC32_REMAINDER; | |
952 | } | |
953 | ||
954 | ||
955 | /* | |
956 | * Preliminary checks if frame header is correct, calculates its CRC | |
957 | * and split it to simple fields | |
958 | */ | |
959 | ||
960 | static int | |
961 | check_fhdr( u32 ioaddr, u32 *framelen, u32 *frameno, u32 *ack, | |
962 | u32 *is_first, u32 *crc_p ) | |
963 | { | |
964 | u32 crc = *crc_p; | |
965 | u8 value; | |
966 | ||
967 | if( inb( ioaddr + DAT ) != SBNI_SIG ) | |
968 | return 0; | |
969 | ||
970 | value = inb( ioaddr + DAT ); | |
971 | *framelen = (u32)value; | |
972 | crc = CRC32( value, crc ); | |
973 | value = inb( ioaddr + DAT ); | |
974 | *framelen |= ((u32)value) << 8; | |
975 | crc = CRC32( value, crc ); | |
976 | ||
977 | *ack = *framelen & FRAME_ACK_MASK; | |
978 | *is_first = (*framelen & FRAME_FIRST) != 0; | |
979 | ||
980 | if( (*framelen &= FRAME_LEN_MASK) < 6 | |
981 | || *framelen > SBNI_MAX_FRAME - 3 ) | |
982 | return 0; | |
983 | ||
984 | value = inb( ioaddr + DAT ); | |
985 | *frameno = (u32)value; | |
986 | crc = CRC32( value, crc ); | |
987 | ||
988 | crc = CRC32( inb( ioaddr + DAT ), crc ); /* reserved byte */ | |
989 | *framelen -= 2; | |
990 | ||
991 | *crc_p = crc; | |
992 | return 1; | |
993 | } | |
994 | ||
995 | ||
996 | static struct sk_buff * | |
997 | get_rx_buf( struct net_device *dev ) | |
998 | { | |
999 | /* +2 is to compensate for the alignment fixup below */ | |
1000 | struct sk_buff *skb = dev_alloc_skb( ETHER_MAX_LEN + 2 ); | |
1001 | if( !skb ) | |
1002 | return NULL; | |
1003 | ||
1da177e4 LT |
1004 | skb_reserve( skb, 2 ); /* Align IP on longword boundaries */ |
1005 | return skb; | |
1006 | } | |
1007 | ||
1008 | ||
1009 | static void | |
1010 | indicate_pkt( struct net_device *dev ) | |
1011 | { | |
486bf8de | 1012 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
1013 | struct sk_buff *skb = nl->rx_buf_p; |
1014 | ||
1015 | skb_put( skb, nl->inppos ); | |
1016 | ||
1017 | #ifdef CONFIG_SBNI_MULTILINE | |
1018 | skb->protocol = eth_type_trans( skb, nl->master ); | |
1019 | netif_rx( skb ); | |
486bf8de WC |
1020 | ++((struct net_local *)netdev_priv(nl->master))->stats.rx_packets; |
1021 | ((struct net_local *)netdev_priv(nl->master))->stats.rx_bytes += | |
1022 | nl->inppos; | |
1da177e4 LT |
1023 | #else |
1024 | skb->protocol = eth_type_trans( skb, dev ); | |
1025 | netif_rx( skb ); | |
1da177e4 LT |
1026 | ++nl->stats.rx_packets; |
1027 | nl->stats.rx_bytes += nl->inppos; | |
1028 | #endif | |
1029 | nl->rx_buf_p = NULL; /* protocol driver will clear this sk_buff */ | |
1030 | } | |
1031 | ||
1032 | ||
1033 | /* -------------------------------------------------------------------------- */ | |
1034 | ||
1035 | /* | |
1036 | * Routine checks periodically wire activity and regenerates marker if | |
1037 | * connect was inactive for a long time. | |
1038 | */ | |
1039 | ||
1040 | static void | |
1041 | sbni_watchdog( unsigned long arg ) | |
1042 | { | |
1043 | struct net_device *dev = (struct net_device *) arg; | |
486bf8de | 1044 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
1045 | struct timer_list *w = &nl->watchdog; |
1046 | unsigned long flags; | |
1047 | unsigned char csr0; | |
1048 | ||
1049 | spin_lock_irqsave( &nl->lock, flags ); | |
1050 | ||
1051 | csr0 = inb( dev->base_addr + CSR0 ); | |
1052 | if( csr0 & RC_CHK ) { | |
1053 | ||
1054 | if( nl->timer_ticks ) { | |
1055 | if( csr0 & (RC_RDY | BU_EMP) ) | |
1056 | /* receiving not active */ | |
1057 | nl->timer_ticks--; | |
1058 | } else { | |
1059 | nl->in_stats.timeout_number++; | |
1060 | if( nl->delta_rxl ) | |
1061 | timeout_change_level( dev ); | |
1062 | ||
1063 | outb( *(u_char *)&nl->csr1 | PR_RES, | |
1064 | dev->base_addr + CSR1 ); | |
1065 | csr0 = inb( dev->base_addr + CSR0 ); | |
1066 | } | |
1067 | } else | |
1068 | nl->state &= ~FL_LINE_DOWN; | |
1069 | ||
1070 | outb( csr0 | RC_CHK, dev->base_addr + CSR0 ); | |
1071 | ||
1072 | init_timer( w ); | |
1073 | w->expires = jiffies + SBNI_TIMEOUT; | |
1074 | w->data = arg; | |
1075 | w->function = sbni_watchdog; | |
1076 | add_timer( w ); | |
1077 | ||
1078 | spin_unlock_irqrestore( &nl->lock, flags ); | |
1079 | } | |
1080 | ||
1081 | ||
1082 | static unsigned char rxl_tab[] = { | |
1083 | 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x08, | |
1084 | 0x0a, 0x0c, 0x0f, 0x16, 0x18, 0x1a, 0x1c, 0x1f | |
1085 | }; | |
1086 | ||
1087 | #define SIZE_OF_TIMEOUT_RXL_TAB 4 | |
1088 | static unsigned char timeout_rxl_tab[] = { | |
1089 | 0x03, 0x05, 0x08, 0x0b | |
1090 | }; | |
1091 | ||
1092 | /* -------------------------------------------------------------------------- */ | |
1093 | ||
1094 | static void | |
1095 | card_start( struct net_device *dev ) | |
1096 | { | |
486bf8de | 1097 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
1098 | |
1099 | nl->timer_ticks = CHANGE_LEVEL_START_TICKS; | |
1100 | nl->state &= ~(FL_WAIT_ACK | FL_NEED_RESEND); | |
1101 | nl->state |= FL_PREV_OK; | |
1102 | ||
1103 | nl->inppos = nl->outpos = 0; | |
1104 | nl->wait_frameno = 0; | |
1105 | nl->tx_frameno = 0; | |
1106 | nl->framelen = 0; | |
1107 | ||
1108 | outb( *(u_char *)&nl->csr1 | PR_RES, dev->base_addr + CSR1 ); | |
1109 | outb( EN_INT, dev->base_addr + CSR0 ); | |
1110 | } | |
1111 | ||
1112 | /* -------------------------------------------------------------------------- */ | |
1113 | ||
1114 | /* Receive level auto-selection */ | |
1115 | ||
1116 | static void | |
1117 | change_level( struct net_device *dev ) | |
1118 | { | |
486bf8de | 1119 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
1120 | |
1121 | if( nl->delta_rxl == 0 ) /* do not auto-negotiate RxL */ | |
1122 | return; | |
1123 | ||
1124 | if( nl->cur_rxl_index == 0 ) | |
1125 | nl->delta_rxl = 1; | |
1126 | else if( nl->cur_rxl_index == 15 ) | |
1127 | nl->delta_rxl = -1; | |
1128 | else if( nl->cur_rxl_rcvd < nl->prev_rxl_rcvd ) | |
1129 | nl->delta_rxl = -nl->delta_rxl; | |
1130 | ||
1131 | nl->csr1.rxl = rxl_tab[ nl->cur_rxl_index += nl->delta_rxl ]; | |
1132 | inb( dev->base_addr + CSR0 ); /* needs for PCI cards */ | |
1133 | outb( *(u8 *)&nl->csr1, dev->base_addr + CSR1 ); | |
1134 | ||
1135 | nl->prev_rxl_rcvd = nl->cur_rxl_rcvd; | |
1136 | nl->cur_rxl_rcvd = 0; | |
1137 | } | |
1138 | ||
1139 | ||
1140 | static void | |
1141 | timeout_change_level( struct net_device *dev ) | |
1142 | { | |
486bf8de | 1143 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
1144 | |
1145 | nl->cur_rxl_index = timeout_rxl_tab[ nl->timeout_rxl ]; | |
1146 | if( ++nl->timeout_rxl >= 4 ) | |
1147 | nl->timeout_rxl = 0; | |
1148 | ||
1149 | nl->csr1.rxl = rxl_tab[ nl->cur_rxl_index ]; | |
1150 | inb( dev->base_addr + CSR0 ); | |
1151 | outb( *(unsigned char *)&nl->csr1, dev->base_addr + CSR1 ); | |
1152 | ||
1153 | nl->prev_rxl_rcvd = nl->cur_rxl_rcvd; | |
1154 | nl->cur_rxl_rcvd = 0; | |
1155 | } | |
1156 | ||
1157 | /* -------------------------------------------------------------------------- */ | |
1158 | ||
1159 | /* | |
1160 | * Open/initialize the board. | |
1161 | */ | |
1162 | ||
1163 | static int | |
1164 | sbni_open( struct net_device *dev ) | |
1165 | { | |
486bf8de | 1166 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
1167 | struct timer_list *w = &nl->watchdog; |
1168 | ||
1169 | /* | |
1170 | * For double ISA adapters within "common irq" mode, we have to | |
1171 | * determine whether primary or secondary channel is initialized, | |
1172 | * and set the irq handler only in first case. | |
1173 | */ | |
1174 | if( dev->base_addr < 0x400 ) { /* ISA only */ | |
1175 | struct net_device **p = sbni_cards; | |
1176 | for( ; *p && p < sbni_cards + SBNI_MAX_NUM_CARDS; ++p ) | |
1177 | if( (*p)->irq == dev->irq | |
1178 | && ((*p)->base_addr == dev->base_addr + 4 | |
1179 | || (*p)->base_addr == dev->base_addr - 4) | |
1180 | && (*p)->flags & IFF_UP ) { | |
1181 | ||
486bf8de | 1182 | ((struct net_local *) (netdev_priv(*p))) |
1da177e4 LT |
1183 | ->second = dev; |
1184 | printk( KERN_NOTICE "%s: using shared irq " | |
1185 | "with %s\n", dev->name, (*p)->name ); | |
1186 | nl->state |= FL_SECONDARY; | |
1187 | goto handler_attached; | |
1188 | } | |
1189 | } | |
1190 | ||
1fb9df5d | 1191 | if( request_irq(dev->irq, sbni_interrupt, IRQF_SHARED, dev->name, dev) ) { |
1da177e4 LT |
1192 | printk( KERN_ERR "%s: unable to get IRQ %d.\n", |
1193 | dev->name, dev->irq ); | |
1194 | return -EAGAIN; | |
1195 | } | |
1196 | ||
1197 | handler_attached: | |
1198 | ||
1199 | spin_lock( &nl->lock ); | |
1200 | memset( &nl->stats, 0, sizeof(struct net_device_stats) ); | |
1201 | memset( &nl->in_stats, 0, sizeof(struct sbni_in_stats) ); | |
1202 | ||
1203 | card_start( dev ); | |
1204 | ||
1205 | netif_start_queue( dev ); | |
1206 | ||
1207 | /* set timer watchdog */ | |
1208 | init_timer( w ); | |
1209 | w->expires = jiffies + SBNI_TIMEOUT; | |
1210 | w->data = (unsigned long) dev; | |
1211 | w->function = sbni_watchdog; | |
1212 | add_timer( w ); | |
1213 | ||
1214 | spin_unlock( &nl->lock ); | |
1215 | return 0; | |
1216 | } | |
1217 | ||
1218 | ||
1219 | static int | |
1220 | sbni_close( struct net_device *dev ) | |
1221 | { | |
486bf8de | 1222 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
1223 | |
1224 | if( nl->second && nl->second->flags & IFF_UP ) { | |
1225 | printk( KERN_NOTICE "Secondary channel (%s) is active!\n", | |
1226 | nl->second->name ); | |
1227 | return -EBUSY; | |
1228 | } | |
1229 | ||
1230 | #ifdef CONFIG_SBNI_MULTILINE | |
1231 | if( nl->state & FL_SLAVE ) | |
1232 | emancipate( dev ); | |
1233 | else | |
1234 | while( nl->link ) /* it's master device! */ | |
1235 | emancipate( nl->link ); | |
1236 | #endif | |
1237 | ||
1238 | spin_lock( &nl->lock ); | |
1239 | ||
1240 | nl->second = NULL; | |
1241 | drop_xmit_queue( dev ); | |
1242 | netif_stop_queue( dev ); | |
1243 | ||
1244 | del_timer( &nl->watchdog ); | |
1245 | ||
1246 | outb( 0, dev->base_addr + CSR0 ); | |
1247 | ||
1248 | if( !(nl->state & FL_SECONDARY) ) | |
1249 | free_irq( dev->irq, dev ); | |
1250 | nl->state &= FL_SECONDARY; | |
1251 | ||
1252 | spin_unlock( &nl->lock ); | |
1253 | return 0; | |
1254 | } | |
1255 | ||
1256 | ||
1257 | /* | |
1258 | Valid combinations in CSR0 (for probing): | |
1259 | ||
1260 | VALID_DECODER 0000,0011,1011,1010 | |
1261 | ||
1262 | ; 0 ; - | |
1263 | TR_REQ ; 1 ; + | |
1264 | TR_RDY ; 2 ; - | |
1265 | TR_RDY TR_REQ ; 3 ; + | |
1266 | BU_EMP ; 4 ; + | |
1267 | BU_EMP TR_REQ ; 5 ; + | |
1268 | BU_EMP TR_RDY ; 6 ; - | |
1269 | BU_EMP TR_RDY TR_REQ ; 7 ; + | |
1270 | RC_RDY ; 8 ; + | |
1271 | RC_RDY TR_REQ ; 9 ; + | |
1272 | RC_RDY TR_RDY ; 10 ; - | |
1273 | RC_RDY TR_RDY TR_REQ ; 11 ; - | |
1274 | RC_RDY BU_EMP ; 12 ; - | |
1275 | RC_RDY BU_EMP TR_REQ ; 13 ; - | |
1276 | RC_RDY BU_EMP TR_RDY ; 14 ; - | |
1277 | RC_RDY BU_EMP TR_RDY TR_REQ ; 15 ; - | |
1278 | */ | |
1279 | ||
1280 | #define VALID_DECODER (2 + 8 + 0x10 + 0x20 + 0x80 + 0x100 + 0x200) | |
1281 | ||
1282 | ||
1283 | static int | |
1284 | sbni_card_probe( unsigned long ioaddr ) | |
1285 | { | |
1286 | unsigned char csr0; | |
1287 | ||
1288 | csr0 = inb( ioaddr + CSR0 ); | |
1289 | if( csr0 != 0xff && csr0 != 0x00 ) { | |
1290 | csr0 &= ~EN_INT; | |
1291 | if( csr0 & BU_EMP ) | |
1292 | csr0 |= EN_INT; | |
1293 | ||
1294 | if( VALID_DECODER & (1 << (csr0 >> 4)) ) | |
1295 | return 0; | |
1296 | } | |
1297 | ||
1298 | return -ENODEV; | |
1299 | } | |
1300 | ||
1301 | /* -------------------------------------------------------------------------- */ | |
1302 | ||
1303 | static int | |
1304 | sbni_ioctl( struct net_device *dev, struct ifreq *ifr, int cmd ) | |
1305 | { | |
486bf8de | 1306 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
1307 | struct sbni_flags flags; |
1308 | int error = 0; | |
1309 | ||
1310 | #ifdef CONFIG_SBNI_MULTILINE | |
1311 | struct net_device *slave_dev; | |
1312 | char slave_name[ 8 ]; | |
1313 | #endif | |
1314 | ||
1315 | switch( cmd ) { | |
1316 | case SIOCDEVGETINSTATS : | |
1317 | if (copy_to_user( ifr->ifr_data, &nl->in_stats, | |
1318 | sizeof(struct sbni_in_stats) )) | |
1319 | error = -EFAULT; | |
1320 | break; | |
1321 | ||
1322 | case SIOCDEVRESINSTATS : | |
f2455eb1 | 1323 | if (!capable(CAP_NET_ADMIN)) |
1da177e4 LT |
1324 | return -EPERM; |
1325 | memset( &nl->in_stats, 0, sizeof(struct sbni_in_stats) ); | |
1326 | break; | |
1327 | ||
1328 | case SIOCDEVGHWSTATE : | |
1329 | flags.mac_addr = *(u32 *)(dev->dev_addr + 3); | |
1330 | flags.rate = nl->csr1.rate; | |
1331 | flags.slow_mode = (nl->state & FL_SLOW_MODE) != 0; | |
1332 | flags.rxl = nl->cur_rxl_index; | |
1333 | flags.fixed_rxl = nl->delta_rxl == 0; | |
1334 | ||
1335 | if (copy_to_user( ifr->ifr_data, &flags, sizeof flags )) | |
1336 | error = -EFAULT; | |
1337 | break; | |
1338 | ||
1339 | case SIOCDEVSHWSTATE : | |
f2455eb1 | 1340 | if (!capable(CAP_NET_ADMIN)) |
1da177e4 LT |
1341 | return -EPERM; |
1342 | ||
1343 | spin_lock( &nl->lock ); | |
1344 | flags = *(struct sbni_flags*) &ifr->ifr_ifru; | |
1345 | if( flags.fixed_rxl ) | |
1346 | nl->delta_rxl = 0, | |
1347 | nl->cur_rxl_index = flags.rxl; | |
1348 | else | |
1349 | nl->delta_rxl = DEF_RXL_DELTA, | |
1350 | nl->cur_rxl_index = DEF_RXL; | |
1351 | ||
1352 | nl->csr1.rxl = rxl_tab[ nl->cur_rxl_index ]; | |
1353 | nl->csr1.rate = flags.rate; | |
1354 | outb( *(u8 *)&nl->csr1 | PR_RES, dev->base_addr + CSR1 ); | |
1355 | spin_unlock( &nl->lock ); | |
1356 | break; | |
1357 | ||
1358 | #ifdef CONFIG_SBNI_MULTILINE | |
1359 | ||
1360 | case SIOCDEVENSLAVE : | |
f2455eb1 | 1361 | if (!capable(CAP_NET_ADMIN)) |
1da177e4 LT |
1362 | return -EPERM; |
1363 | ||
1364 | if (copy_from_user( slave_name, ifr->ifr_data, sizeof slave_name )) | |
1365 | return -EFAULT; | |
881d966b | 1366 | slave_dev = dev_get_by_name(&init_net, slave_name ); |
1da177e4 LT |
1367 | if( !slave_dev || !(slave_dev->flags & IFF_UP) ) { |
1368 | printk( KERN_ERR "%s: trying to enslave non-active " | |
1369 | "device %s\n", dev->name, slave_name ); | |
1370 | return -EPERM; | |
1371 | } | |
1372 | ||
1373 | return enslave( dev, slave_dev ); | |
1374 | ||
1375 | case SIOCDEVEMANSIPATE : | |
f2455eb1 | 1376 | if (!capable(CAP_NET_ADMIN)) |
1da177e4 LT |
1377 | return -EPERM; |
1378 | ||
1379 | return emancipate( dev ); | |
1380 | ||
1381 | #endif /* CONFIG_SBNI_MULTILINE */ | |
1382 | ||
1383 | default : | |
1384 | return -EOPNOTSUPP; | |
1385 | } | |
1386 | ||
1387 | return error; | |
1388 | } | |
1389 | ||
1390 | ||
1391 | #ifdef CONFIG_SBNI_MULTILINE | |
1392 | ||
1393 | static int | |
1394 | enslave( struct net_device *dev, struct net_device *slave_dev ) | |
1395 | { | |
486bf8de WC |
1396 | struct net_local *nl = netdev_priv(dev); |
1397 | struct net_local *snl = netdev_priv(slave_dev); | |
1da177e4 LT |
1398 | |
1399 | if( nl->state & FL_SLAVE ) /* This isn't master or free device */ | |
1400 | return -EBUSY; | |
1401 | ||
1402 | if( snl->state & FL_SLAVE ) /* That was already enslaved */ | |
1403 | return -EBUSY; | |
1404 | ||
1405 | spin_lock( &nl->lock ); | |
1406 | spin_lock( &snl->lock ); | |
1407 | ||
1408 | /* append to list */ | |
1409 | snl->link = nl->link; | |
1410 | nl->link = slave_dev; | |
1411 | snl->master = dev; | |
1412 | snl->state |= FL_SLAVE; | |
1413 | ||
1414 | /* Summary statistics of MultiLine operation will be stored | |
1415 | in master's counters */ | |
1416 | memset( &snl->stats, 0, sizeof(struct net_device_stats) ); | |
1417 | netif_stop_queue( slave_dev ); | |
1418 | netif_wake_queue( dev ); /* Now we are able to transmit */ | |
1419 | ||
1420 | spin_unlock( &snl->lock ); | |
1421 | spin_unlock( &nl->lock ); | |
1422 | printk( KERN_NOTICE "%s: slave device (%s) attached.\n", | |
1423 | dev->name, slave_dev->name ); | |
1424 | return 0; | |
1425 | } | |
1426 | ||
1427 | ||
1428 | static int | |
1429 | emancipate( struct net_device *dev ) | |
1430 | { | |
486bf8de | 1431 | struct net_local *snl = netdev_priv(dev); |
1da177e4 | 1432 | struct net_device *p = snl->master; |
486bf8de | 1433 | struct net_local *nl = netdev_priv(p); |
1da177e4 LT |
1434 | |
1435 | if( !(snl->state & FL_SLAVE) ) | |
1436 | return -EINVAL; | |
1437 | ||
1438 | spin_lock( &nl->lock ); | |
1439 | spin_lock( &snl->lock ); | |
1440 | drop_xmit_queue( dev ); | |
1441 | ||
1442 | /* exclude from list */ | |
1443 | for(;;) { /* must be in list */ | |
486bf8de | 1444 | struct net_local *t = netdev_priv(p); |
1da177e4 LT |
1445 | if( t->link == dev ) { |
1446 | t->link = snl->link; | |
1447 | break; | |
1448 | } | |
1449 | p = t->link; | |
1450 | } | |
1451 | ||
1452 | snl->link = NULL; | |
1453 | snl->master = dev; | |
1454 | snl->state &= ~FL_SLAVE; | |
1455 | ||
1456 | netif_start_queue( dev ); | |
1457 | ||
1458 | spin_unlock( &snl->lock ); | |
1459 | spin_unlock( &nl->lock ); | |
1460 | ||
1461 | dev_put( dev ); | |
1462 | return 0; | |
1463 | } | |
1464 | ||
1465 | #endif | |
1466 | ||
1467 | ||
1468 | static struct net_device_stats * | |
1469 | sbni_get_stats( struct net_device *dev ) | |
1470 | { | |
486bf8de | 1471 | return &((struct net_local *)netdev_priv(dev))->stats; |
1da177e4 LT |
1472 | } |
1473 | ||
1474 | ||
1475 | static void | |
1476 | set_multicast_list( struct net_device *dev ) | |
1477 | { | |
1478 | return; /* sbni always operate in promiscuos mode */ | |
1479 | } | |
1480 | ||
1481 | ||
1482 | #ifdef MODULE | |
1483 | module_param_array(io, int, NULL, 0); | |
1484 | module_param_array(irq, int, NULL, 0); | |
1485 | module_param_array(baud, int, NULL, 0); | |
1486 | module_param_array(rxl, int, NULL, 0); | |
1487 | module_param_array(mac, int, NULL, 0); | |
1488 | module_param(skip_pci_probe, bool, 0); | |
1489 | ||
1490 | MODULE_LICENSE("GPL"); | |
1491 | ||
1492 | ||
471a24c0 | 1493 | int __init init_module( void ) |
1da177e4 LT |
1494 | { |
1495 | struct net_device *dev; | |
1496 | int err; | |
1497 | ||
1498 | while( num < SBNI_MAX_NUM_CARDS ) { | |
1499 | dev = alloc_netdev(sizeof(struct net_local), | |
1500 | "sbni%d", sbni_devsetup); | |
1501 | if( !dev) | |
1502 | break; | |
1503 | ||
1504 | sprintf( dev->name, "sbni%d", num ); | |
1505 | ||
1506 | err = sbni_init(dev); | |
1507 | if (err) { | |
1508 | free_netdev(dev); | |
1509 | break; | |
1510 | } | |
1511 | ||
1512 | if( register_netdev( dev ) ) { | |
1513 | release_region( dev->base_addr, SBNI_IO_EXTENT ); | |
1514 | free_netdev( dev ); | |
1515 | break; | |
1516 | } | |
1517 | } | |
1518 | ||
1519 | return *sbni_cards ? 0 : -ENODEV; | |
1520 | } | |
1521 | ||
1522 | void | |
1523 | cleanup_module( void ) | |
1524 | { | |
1525 | struct net_device *dev; | |
1526 | int num; | |
1527 | ||
1528 | for( num = 0; num < SBNI_MAX_NUM_CARDS; ++num ) | |
1529 | if( (dev = sbni_cards[ num ]) != NULL ) { | |
1530 | unregister_netdev( dev ); | |
1531 | release_region( dev->base_addr, SBNI_IO_EXTENT ); | |
1532 | free_netdev( dev ); | |
1533 | } | |
1534 | } | |
1535 | ||
1536 | #else /* MODULE */ | |
1537 | ||
1538 | static int __init | |
1539 | sbni_setup( char *p ) | |
1540 | { | |
1541 | int n, parm; | |
1542 | ||
1543 | if( *p++ != '(' ) | |
1544 | goto bad_param; | |
1545 | ||
1546 | for( n = 0, parm = 0; *p && n < 8; ) { | |
1547 | (*dest[ parm ])[ n ] = simple_strtol( p, &p, 0 ); | |
1548 | if( !*p || *p == ')' ) | |
1549 | return 1; | |
1550 | if( *p == ';' ) | |
1551 | ++p, ++n, parm = 0; | |
1552 | else if( *p++ != ',' ) | |
1553 | break; | |
1554 | else | |
1555 | if( ++parm >= 5 ) | |
1556 | break; | |
1557 | } | |
1558 | bad_param: | |
1559 | printk( KERN_ERR "Error in sbni kernel parameter!\n" ); | |
1560 | return 0; | |
1561 | } | |
1562 | ||
1563 | __setup( "sbni=", sbni_setup ); | |
1564 | ||
1565 | #endif /* MODULE */ | |
1566 | ||
1567 | /* -------------------------------------------------------------------------- */ | |
1568 | ||
1569 | #ifdef ASM_CRC | |
1570 | ||
1571 | static u32 | |
1572 | calc_crc32( u32 crc, u8 *p, u32 len ) | |
1573 | { | |
1574 | register u32 _crc; | |
1575 | _crc = crc; | |
1576 | ||
1577 | __asm__ __volatile__ ( | |
1578 | "xorl %%ebx, %%ebx\n" | |
1579 | "movl %2, %%esi\n" | |
1580 | "movl %3, %%ecx\n" | |
1581 | "movl $crc32tab, %%edi\n" | |
1582 | "shrl $2, %%ecx\n" | |
1583 | "jz 1f\n" | |
1584 | ||
1585 | ".align 4\n" | |
1586 | "0:\n" | |
1587 | "movb %%al, %%bl\n" | |
1588 | "movl (%%esi), %%edx\n" | |
1589 | "shrl $8, %%eax\n" | |
1590 | "xorb %%dl, %%bl\n" | |
1591 | "shrl $8, %%edx\n" | |
1592 | "xorl (%%edi,%%ebx,4), %%eax\n" | |
1593 | ||
1594 | "movb %%al, %%bl\n" | |
1595 | "shrl $8, %%eax\n" | |
1596 | "xorb %%dl, %%bl\n" | |
1597 | "shrl $8, %%edx\n" | |
1598 | "xorl (%%edi,%%ebx,4), %%eax\n" | |
1599 | ||
1600 | "movb %%al, %%bl\n" | |
1601 | "shrl $8, %%eax\n" | |
1602 | "xorb %%dl, %%bl\n" | |
1603 | "movb %%dh, %%dl\n" | |
1604 | "xorl (%%edi,%%ebx,4), %%eax\n" | |
1605 | ||
1606 | "movb %%al, %%bl\n" | |
1607 | "shrl $8, %%eax\n" | |
1608 | "xorb %%dl, %%bl\n" | |
1609 | "addl $4, %%esi\n" | |
1610 | "xorl (%%edi,%%ebx,4), %%eax\n" | |
1611 | ||
1612 | "decl %%ecx\n" | |
1613 | "jnz 0b\n" | |
1614 | ||
1615 | "1:\n" | |
1616 | "movl %3, %%ecx\n" | |
1617 | "andl $3, %%ecx\n" | |
1618 | "jz 2f\n" | |
1619 | ||
1620 | "movb %%al, %%bl\n" | |
1621 | "shrl $8, %%eax\n" | |
1622 | "xorb (%%esi), %%bl\n" | |
1623 | "xorl (%%edi,%%ebx,4), %%eax\n" | |
1624 | ||
1625 | "decl %%ecx\n" | |
1626 | "jz 2f\n" | |
1627 | ||
1628 | "movb %%al, %%bl\n" | |
1629 | "shrl $8, %%eax\n" | |
1630 | "xorb 1(%%esi), %%bl\n" | |
1631 | "xorl (%%edi,%%ebx,4), %%eax\n" | |
1632 | ||
1633 | "decl %%ecx\n" | |
1634 | "jz 2f\n" | |
1635 | ||
1636 | "movb %%al, %%bl\n" | |
1637 | "shrl $8, %%eax\n" | |
1638 | "xorb 2(%%esi), %%bl\n" | |
1639 | "xorl (%%edi,%%ebx,4), %%eax\n" | |
1640 | "2:\n" | |
1641 | : "=a" (_crc) | |
1642 | : "0" (_crc), "g" (p), "g" (len) | |
1643 | : "bx", "cx", "dx", "si", "di" | |
1644 | ); | |
1645 | ||
1646 | return _crc; | |
1647 | } | |
1648 | ||
1649 | #else /* ASM_CRC */ | |
1650 | ||
1651 | static u32 | |
1652 | calc_crc32( u32 crc, u8 *p, u32 len ) | |
1653 | { | |
1654 | while( len-- ) | |
1655 | crc = CRC32( *p++, crc ); | |
1656 | ||
1657 | return crc; | |
1658 | } | |
1659 | ||
1660 | #endif /* ASM_CRC */ | |
1661 | ||
1662 | ||
1663 | static u32 crc32tab[] __attribute__ ((aligned(8))) = { | |
1664 | 0xD202EF8D, 0xA505DF1B, 0x3C0C8EA1, 0x4B0BBE37, | |
1665 | 0xD56F2B94, 0xA2681B02, 0x3B614AB8, 0x4C667A2E, | |
1666 | 0xDCD967BF, 0xABDE5729, 0x32D70693, 0x45D03605, | |
1667 | 0xDBB4A3A6, 0xACB39330, 0x35BAC28A, 0x42BDF21C, | |
1668 | 0xCFB5FFE9, 0xB8B2CF7F, 0x21BB9EC5, 0x56BCAE53, | |
1669 | 0xC8D83BF0, 0xBFDF0B66, 0x26D65ADC, 0x51D16A4A, | |
1670 | 0xC16E77DB, 0xB669474D, 0x2F6016F7, 0x58672661, | |
1671 | 0xC603B3C2, 0xB1048354, 0x280DD2EE, 0x5F0AE278, | |
1672 | 0xE96CCF45, 0x9E6BFFD3, 0x0762AE69, 0x70659EFF, | |
1673 | 0xEE010B5C, 0x99063BCA, 0x000F6A70, 0x77085AE6, | |
1674 | 0xE7B74777, 0x90B077E1, 0x09B9265B, 0x7EBE16CD, | |
1675 | 0xE0DA836E, 0x97DDB3F8, 0x0ED4E242, 0x79D3D2D4, | |
1676 | 0xF4DBDF21, 0x83DCEFB7, 0x1AD5BE0D, 0x6DD28E9B, | |
1677 | 0xF3B61B38, 0x84B12BAE, 0x1DB87A14, 0x6ABF4A82, | |
1678 | 0xFA005713, 0x8D076785, 0x140E363F, 0x630906A9, | |
1679 | 0xFD6D930A, 0x8A6AA39C, 0x1363F226, 0x6464C2B0, | |
1680 | 0xA4DEAE1D, 0xD3D99E8B, 0x4AD0CF31, 0x3DD7FFA7, | |
1681 | 0xA3B36A04, 0xD4B45A92, 0x4DBD0B28, 0x3ABA3BBE, | |
1682 | 0xAA05262F, 0xDD0216B9, 0x440B4703, 0x330C7795, | |
1683 | 0xAD68E236, 0xDA6FD2A0, 0x4366831A, 0x3461B38C, | |
1684 | 0xB969BE79, 0xCE6E8EEF, 0x5767DF55, 0x2060EFC3, | |
1685 | 0xBE047A60, 0xC9034AF6, 0x500A1B4C, 0x270D2BDA, | |
1686 | 0xB7B2364B, 0xC0B506DD, 0x59BC5767, 0x2EBB67F1, | |
1687 | 0xB0DFF252, 0xC7D8C2C4, 0x5ED1937E, 0x29D6A3E8, | |
1688 | 0x9FB08ED5, 0xE8B7BE43, 0x71BEEFF9, 0x06B9DF6F, | |
1689 | 0x98DD4ACC, 0xEFDA7A5A, 0x76D32BE0, 0x01D41B76, | |
1690 | 0x916B06E7, 0xE66C3671, 0x7F6567CB, 0x0862575D, | |
1691 | 0x9606C2FE, 0xE101F268, 0x7808A3D2, 0x0F0F9344, | |
1692 | 0x82079EB1, 0xF500AE27, 0x6C09FF9D, 0x1B0ECF0B, | |
1693 | 0x856A5AA8, 0xF26D6A3E, 0x6B643B84, 0x1C630B12, | |
1694 | 0x8CDC1683, 0xFBDB2615, 0x62D277AF, 0x15D54739, | |
1695 | 0x8BB1D29A, 0xFCB6E20C, 0x65BFB3B6, 0x12B88320, | |
1696 | 0x3FBA6CAD, 0x48BD5C3B, 0xD1B40D81, 0xA6B33D17, | |
1697 | 0x38D7A8B4, 0x4FD09822, 0xD6D9C998, 0xA1DEF90E, | |
1698 | 0x3161E49F, 0x4666D409, 0xDF6F85B3, 0xA868B525, | |
1699 | 0x360C2086, 0x410B1010, 0xD80241AA, 0xAF05713C, | |
1700 | 0x220D7CC9, 0x550A4C5F, 0xCC031DE5, 0xBB042D73, | |
1701 | 0x2560B8D0, 0x52678846, 0xCB6ED9FC, 0xBC69E96A, | |
1702 | 0x2CD6F4FB, 0x5BD1C46D, 0xC2D895D7, 0xB5DFA541, | |
1703 | 0x2BBB30E2, 0x5CBC0074, 0xC5B551CE, 0xB2B26158, | |
1704 | 0x04D44C65, 0x73D37CF3, 0xEADA2D49, 0x9DDD1DDF, | |
1705 | 0x03B9887C, 0x74BEB8EA, 0xEDB7E950, 0x9AB0D9C6, | |
1706 | 0x0A0FC457, 0x7D08F4C1, 0xE401A57B, 0x930695ED, | |
1707 | 0x0D62004E, 0x7A6530D8, 0xE36C6162, 0x946B51F4, | |
1708 | 0x19635C01, 0x6E646C97, 0xF76D3D2D, 0x806A0DBB, | |
1709 | 0x1E0E9818, 0x6909A88E, 0xF000F934, 0x8707C9A2, | |
1710 | 0x17B8D433, 0x60BFE4A5, 0xF9B6B51F, 0x8EB18589, | |
1711 | 0x10D5102A, 0x67D220BC, 0xFEDB7106, 0x89DC4190, | |
1712 | 0x49662D3D, 0x3E611DAB, 0xA7684C11, 0xD06F7C87, | |
1713 | 0x4E0BE924, 0x390CD9B2, 0xA0058808, 0xD702B89E, | |
1714 | 0x47BDA50F, 0x30BA9599, 0xA9B3C423, 0xDEB4F4B5, | |
1715 | 0x40D06116, 0x37D75180, 0xAEDE003A, 0xD9D930AC, | |
1716 | 0x54D13D59, 0x23D60DCF, 0xBADF5C75, 0xCDD86CE3, | |
1717 | 0x53BCF940, 0x24BBC9D6, 0xBDB2986C, 0xCAB5A8FA, | |
1718 | 0x5A0AB56B, 0x2D0D85FD, 0xB404D447, 0xC303E4D1, | |
1719 | 0x5D677172, 0x2A6041E4, 0xB369105E, 0xC46E20C8, | |
1720 | 0x72080DF5, 0x050F3D63, 0x9C066CD9, 0xEB015C4F, | |
1721 | 0x7565C9EC, 0x0262F97A, 0x9B6BA8C0, 0xEC6C9856, | |
1722 | 0x7CD385C7, 0x0BD4B551, 0x92DDE4EB, 0xE5DAD47D, | |
1723 | 0x7BBE41DE, 0x0CB97148, 0x95B020F2, 0xE2B71064, | |
1724 | 0x6FBF1D91, 0x18B82D07, 0x81B17CBD, 0xF6B64C2B, | |
1725 | 0x68D2D988, 0x1FD5E91E, 0x86DCB8A4, 0xF1DB8832, | |
1726 | 0x616495A3, 0x1663A535, 0x8F6AF48F, 0xF86DC419, | |
1727 | 0x660951BA, 0x110E612C, 0x88073096, 0xFF000000 | |
1728 | }; | |
1729 |