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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 | ||
23efcb73 JP |
40 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
41 | ||
1da177e4 LT |
42 | #include <linux/module.h> |
43 | #include <linux/kernel.h> | |
44 | #include <linux/ptrace.h> | |
45 | #include <linux/fcntl.h> | |
46 | #include <linux/ioport.h> | |
47 | #include <linux/interrupt.h> | |
1da177e4 LT |
48 | #include <linux/string.h> |
49 | #include <linux/errno.h> | |
50 | #include <linux/netdevice.h> | |
51 | #include <linux/etherdevice.h> | |
52 | #include <linux/pci.h> | |
53 | #include <linux/skbuff.h> | |
54 | #include <linux/timer.h> | |
55 | #include <linux/init.h> | |
56 | #include <linux/delay.h> | |
57 | ||
881d966b | 58 | #include <net/net_namespace.h> |
1da177e4 LT |
59 | #include <net/arp.h> |
60 | ||
61 | #include <asm/io.h> | |
62 | #include <asm/types.h> | |
63 | #include <asm/byteorder.h> | |
64 | #include <asm/irq.h> | |
65 | #include <asm/uaccess.h> | |
66 | ||
67 | #include "sbni.h" | |
68 | ||
69 | /* device private data */ | |
70 | ||
71 | struct net_local { | |
1da177e4 LT |
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 * ); | |
d71a6749 SH |
118 | static netdev_tx_t sbni_start_xmit(struct sk_buff *, |
119 | struct net_device * ); | |
1da177e4 | 120 | static int sbni_ioctl( struct net_device *, struct ifreq *, int ); |
1da177e4 LT |
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 | { | |
8e95a202 JP |
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 ) ) | |
1da177e4 LT |
202 | |
203 | return 0; | |
204 | else { | |
23efcb73 JP |
205 | pr_err("base address 0x%lx is busy, or adapter is malfunctional!\n", |
206 | dev->base_addr); | |
1da177e4 LT |
207 | return -ENODEV; |
208 | } | |
209 | } | |
210 | ||
7dd0b6e0 SH |
211 | static const struct net_device_ops sbni_netdev_ops = { |
212 | .ndo_open = sbni_open, | |
213 | .ndo_stop = sbni_close, | |
214 | .ndo_start_xmit = sbni_start_xmit, | |
afc4b13d | 215 | .ndo_set_rx_mode = set_multicast_list, |
7dd0b6e0 SH |
216 | .ndo_do_ioctl = sbni_ioctl, |
217 | .ndo_change_mtu = eth_change_mtu, | |
218 | .ndo_set_mac_address = eth_mac_addr, | |
219 | .ndo_validate_addr = eth_validate_addr, | |
220 | }; | |
221 | ||
1da177e4 LT |
222 | static void __init sbni_devsetup(struct net_device *dev) |
223 | { | |
224 | ether_setup( dev ); | |
7dd0b6e0 | 225 | dev->netdev_ops = &sbni_netdev_ops; |
1da177e4 LT |
226 | } |
227 | ||
228 | int __init sbni_probe(int unit) | |
229 | { | |
230 | struct net_device *dev; | |
1da177e4 LT |
231 | int err; |
232 | ||
233 | dev = alloc_netdev(sizeof(struct net_local), "sbni", sbni_devsetup); | |
234 | if (!dev) | |
235 | return -ENOMEM; | |
236 | ||
7dd0b6e0 SH |
237 | dev->netdev_ops = &sbni_netdev_ops; |
238 | ||
1da177e4 LT |
239 | sprintf(dev->name, "sbni%d", unit); |
240 | netdev_boot_setup_check(dev); | |
241 | ||
242 | err = sbni_init(dev); | |
243 | if (err) { | |
244 | free_netdev(dev); | |
245 | return err; | |
246 | } | |
247 | ||
248 | err = register_netdev(dev); | |
249 | if (err) { | |
250 | release_region( dev->base_addr, SBNI_IO_EXTENT ); | |
251 | free_netdev(dev); | |
252 | return err; | |
253 | } | |
23efcb73 | 254 | pr_info_once("%s", version); |
1da177e4 LT |
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 ]; | |
8e95a202 JP |
288 | if( request_region( ioaddr, SBNI_IO_EXTENT, dev->name ) && |
289 | sbni_probe1( dev, ioaddr, 0 )) | |
1da177e4 LT |
290 | return 0; |
291 | } | |
292 | ||
293 | return -ENODEV; | |
294 | } | |
295 | ||
296 | ||
486bf8de | 297 | static int __init |
1da177e4 LT |
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; | |
1da177e4 | 306 | |
8e95a202 JP |
307 | if( pdev->vendor != SBNI_PCI_VENDOR && |
308 | pdev->device != SBNI_PCI_DEVICE ) | |
309 | continue; | |
1da177e4 LT |
310 | |
311 | pci_ioaddr = pci_resource_start( pdev, 0 ); | |
312 | pci_irq_line = pdev->irq; | |
313 | ||
314 | /* Avoid already found cards from previous calls */ | |
315 | if( !request_region( pci_ioaddr, SBNI_IO_EXTENT, dev->name ) ) { | |
781223a1 | 316 | if (pdev->subsystem_device != 2) |
1da177e4 LT |
317 | continue; |
318 | ||
319 | /* Dual adapter is present */ | |
320 | if (!request_region(pci_ioaddr += 4, SBNI_IO_EXTENT, | |
321 | dev->name ) ) | |
322 | continue; | |
323 | } | |
324 | ||
60e4ad7a | 325 | if (pci_irq_line <= 0 || pci_irq_line >= nr_irqs) |
23efcb73 JP |
326 | pr_warn( |
327 | "WARNING: The PCI BIOS assigned this PCI card to IRQ %d, which is unlikely to work!.\n" | |
328 | "You should use the PCI BIOS setup to assign a valid IRQ line.\n", | |
1da177e4 LT |
329 | pci_irq_line ); |
330 | ||
331 | /* avoiding re-enable dual adapters */ | |
332 | if( (pci_ioaddr & 7) == 0 && pci_enable_device( pdev ) ) { | |
333 | release_region( pci_ioaddr, SBNI_IO_EXTENT ); | |
334 | pci_dev_put( pdev ); | |
335 | return -EIO; | |
336 | } | |
337 | if( sbni_probe1( dev, pci_ioaddr, pci_irq_line ) ) { | |
338 | SET_NETDEV_DEV(dev, &pdev->dev); | |
339 | /* not the best thing to do, but this is all messed up | |
340 | for hotplug systems anyway... */ | |
341 | pci_dev_put( pdev ); | |
342 | return 0; | |
343 | } | |
344 | } | |
345 | return -ENODEV; | |
346 | } | |
347 | ||
348 | ||
349 | static struct net_device * __init | |
350 | sbni_probe1( struct net_device *dev, unsigned long ioaddr, int irq ) | |
351 | { | |
352 | struct net_local *nl; | |
353 | ||
354 | if( sbni_card_probe( ioaddr ) ) { | |
355 | release_region( ioaddr, SBNI_IO_EXTENT ); | |
356 | return NULL; | |
357 | } | |
358 | ||
359 | outb( 0, ioaddr + CSR0 ); | |
360 | ||
361 | if( irq < 2 ) { | |
362 | unsigned long irq_mask; | |
363 | ||
364 | irq_mask = probe_irq_on(); | |
365 | outb( EN_INT | TR_REQ, ioaddr + CSR0 ); | |
366 | outb( PR_RES, ioaddr + CSR1 ); | |
367 | mdelay(50); | |
368 | irq = probe_irq_off(irq_mask); | |
369 | outb( 0, ioaddr + CSR0 ); | |
370 | ||
371 | if( !irq ) { | |
23efcb73 | 372 | pr_err("%s: can't detect device irq!\n", dev->name); |
1da177e4 LT |
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 | 384 | if( !nl ) { |
23efcb73 | 385 | pr_err("%s: unable to get memory!\n", dev->name); |
1da177e4 LT |
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 | ||
23efcb73 JP |
414 | pr_notice("%s: ioaddr %#lx, irq %d, MAC: 00:ff:01:%02x:%02x:%02x\n", |
415 | dev->name, dev->base_addr, dev->irq, | |
416 | ((u8 *)dev->dev_addr)[3], | |
417 | ((u8 *)dev->dev_addr)[4], | |
418 | ((u8 *)dev->dev_addr)[5]); | |
1da177e4 | 419 | |
23efcb73 JP |
420 | pr_notice("%s: speed %d", |
421 | dev->name, | |
422 | ((nl->state & FL_SLOW_MODE) ? 500000 : 2000000) | |
423 | / (1 << nl->csr1.rate)); | |
1da177e4 LT |
424 | |
425 | if( nl->delta_rxl == 0 ) | |
23efcb73 | 426 | pr_cont(", receive level 0x%x (fixed)\n", nl->cur_rxl_index); |
1da177e4 | 427 | else |
23efcb73 | 428 | pr_cont(", receive level (auto)\n"); |
1da177e4 LT |
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 | ||
d71a6749 | 443 | static netdev_tx_t |
1da177e4 LT |
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 ); | |
6ed10654 | 462 | return NETDEV_TX_OK; |
1da177e4 LT |
463 | } |
464 | } | |
465 | ||
5b548140 | 466 | return NETDEV_TX_BUSY; |
1da177e4 LT |
467 | } |
468 | ||
469 | #else /* CONFIG_SBNI_MULTILINE */ | |
470 | ||
d71a6749 | 471 | static netdev_tx_t |
1da177e4 LT |
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 ); | |
6ed10654 | 482 | return NETDEV_TX_OK; |
1da177e4 LT |
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) ) | |
23efcb73 | 567 | netdev_err(dev, "internal error!\n"); |
1da177e4 LT |
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 | |
fe6c6fbb SH |
726 | nl->master->stats.rx_errors++, |
727 | nl->master->stats.rx_missed_errors++; | |
1da177e4 | 728 | #else |
fe6c6fbb SH |
729 | dev->stats.rx_errors++, |
730 | dev->stats.rx_missed_errors++; | |
1da177e4 LT |
731 | #endif |
732 | /* now skip all frames until is_first != 0 */ | |
733 | } else | |
734 | frame_ok = skip_tail( dev->base_addr, framelen, crc ); | |
735 | ||
736 | if( is_first && !frame_ok ) | |
737 | /* | |
738 | * Frame has been broken, but we had already stored | |
739 | * is_first... Drop entire packet. | |
740 | */ | |
741 | nl->wait_frameno = 0, | |
742 | #ifdef CONFIG_SBNI_MULTILINE | |
fe6c6fbb SH |
743 | nl->master->stats.rx_errors++, |
744 | nl->master->stats.rx_crc_errors++; | |
1da177e4 | 745 | #else |
fe6c6fbb SH |
746 | dev->stats.rx_errors++, |
747 | dev->stats.rx_crc_errors++; | |
1da177e4 LT |
748 | #endif |
749 | ||
750 | return frame_ok; | |
751 | } | |
752 | ||
753 | ||
dfec7228 | 754 | static inline void |
fe6c6fbb | 755 | send_complete( struct net_device *dev ) |
1da177e4 | 756 | { |
fe6c6fbb SH |
757 | struct net_local *nl = netdev_priv(dev); |
758 | ||
1da177e4 | 759 | #ifdef CONFIG_SBNI_MULTILINE |
fe6c6fbb SH |
760 | nl->master->stats.tx_packets++; |
761 | nl->master->stats.tx_bytes += nl->tx_buf_p->len; | |
1da177e4 | 762 | #else |
fe6c6fbb SH |
763 | dev->stats.tx_packets++; |
764 | dev->stats.tx_bytes += nl->tx_buf_p->len; | |
1da177e4 LT |
765 | #endif |
766 | dev_kfree_skb_irq( nl->tx_buf_p ); | |
767 | ||
768 | nl->tx_buf_p = NULL; | |
769 | ||
770 | nl->outpos = 0; | |
771 | nl->state &= ~(FL_WAIT_ACK | FL_NEED_RESEND); | |
772 | nl->framelen = 0; | |
773 | } | |
774 | ||
775 | ||
776 | static void | |
777 | interpret_ack( struct net_device *dev, unsigned ack ) | |
778 | { | |
486bf8de | 779 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
780 | |
781 | if( ack == FRAME_SENT_OK ) { | |
782 | nl->state &= ~FL_NEED_RESEND; | |
783 | ||
784 | if( nl->state & FL_WAIT_ACK ) { | |
785 | nl->outpos += nl->framelen; | |
786 | ||
787 | if( --nl->tx_frameno ) | |
788 | nl->framelen = min_t(unsigned int, | |
789 | nl->maxframe, | |
790 | nl->tx_buf_p->len - nl->outpos); | |
791 | else | |
fe6c6fbb | 792 | send_complete( dev ), |
1da177e4 LT |
793 | #ifdef CONFIG_SBNI_MULTILINE |
794 | netif_wake_queue( nl->master ); | |
795 | #else | |
796 | netif_wake_queue( dev ); | |
797 | #endif | |
798 | } | |
799 | } | |
800 | ||
801 | nl->state &= ~FL_WAIT_ACK; | |
802 | } | |
803 | ||
804 | ||
805 | /* | |
806 | * Glue received frame with previous fragments of packet. | |
807 | * Indicate packet when last frame would be accepted. | |
808 | */ | |
809 | ||
810 | static int | |
811 | append_frame_to_pkt( struct net_device *dev, unsigned framelen, u32 crc ) | |
812 | { | |
486bf8de | 813 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
814 | |
815 | u8 *p; | |
816 | ||
817 | if( nl->inppos + framelen > ETHER_MAX_LEN ) | |
818 | return 0; | |
819 | ||
820 | if( !nl->rx_buf_p && !(nl->rx_buf_p = get_rx_buf( dev )) ) | |
821 | return 0; | |
822 | ||
823 | p = nl->rx_buf_p->data + nl->inppos; | |
824 | insb( dev->base_addr + DAT, p, framelen ); | |
825 | if( calc_crc32( crc, p, framelen ) != CRC32_REMAINDER ) | |
826 | return 0; | |
827 | ||
828 | nl->inppos += framelen - 4; | |
829 | if( --nl->wait_frameno == 0 ) /* last frame received */ | |
830 | indicate_pkt( dev ); | |
831 | ||
832 | return 1; | |
833 | } | |
834 | ||
835 | ||
836 | /* | |
837 | * Prepare to start output on adapter. | |
838 | * Transmitter will be actually activated when marker is accepted. | |
839 | */ | |
840 | ||
841 | static void | |
842 | prepare_to_send( struct sk_buff *skb, struct net_device *dev ) | |
843 | { | |
486bf8de | 844 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
845 | |
846 | unsigned int len; | |
847 | ||
848 | /* nl->tx_buf_p == NULL here! */ | |
849 | if( nl->tx_buf_p ) | |
23efcb73 | 850 | netdev_err(dev, "memory leak!\n"); |
1da177e4 LT |
851 | |
852 | nl->outpos = 0; | |
853 | nl->state &= ~(FL_WAIT_ACK | FL_NEED_RESEND); | |
854 | ||
855 | len = skb->len; | |
856 | if( len < SBNI_MIN_LEN ) | |
857 | len = SBNI_MIN_LEN; | |
858 | ||
859 | nl->tx_buf_p = skb; | |
bb55b327 | 860 | nl->tx_frameno = DIV_ROUND_UP(len, nl->maxframe); |
1da177e4 LT |
861 | nl->framelen = len < nl->maxframe ? len : nl->maxframe; |
862 | ||
863 | outb( inb( dev->base_addr + CSR0 ) | TR_REQ, dev->base_addr + CSR0 ); | |
864 | #ifdef CONFIG_SBNI_MULTILINE | |
865 | nl->master->trans_start = jiffies; | |
866 | #else | |
867 | dev->trans_start = jiffies; | |
868 | #endif | |
869 | } | |
870 | ||
871 | ||
872 | static void | |
873 | drop_xmit_queue( struct net_device *dev ) | |
874 | { | |
486bf8de | 875 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
876 | |
877 | if( nl->tx_buf_p ) | |
878 | dev_kfree_skb_any( nl->tx_buf_p ), | |
879 | nl->tx_buf_p = NULL, | |
880 | #ifdef CONFIG_SBNI_MULTILINE | |
fe6c6fbb SH |
881 | nl->master->stats.tx_errors++, |
882 | nl->master->stats.tx_carrier_errors++; | |
1da177e4 | 883 | #else |
fe6c6fbb SH |
884 | dev->stats.tx_errors++, |
885 | dev->stats.tx_carrier_errors++; | |
1da177e4 LT |
886 | #endif |
887 | ||
888 | nl->tx_frameno = 0; | |
889 | nl->framelen = 0; | |
890 | nl->outpos = 0; | |
891 | nl->state &= ~(FL_WAIT_ACK | FL_NEED_RESEND); | |
892 | #ifdef CONFIG_SBNI_MULTILINE | |
893 | netif_start_queue( nl->master ); | |
894 | nl->master->trans_start = jiffies; | |
895 | #else | |
896 | netif_start_queue( dev ); | |
897 | dev->trans_start = jiffies; | |
898 | #endif | |
899 | } | |
900 | ||
901 | ||
902 | static void | |
903 | send_frame_header( struct net_device *dev, u32 *crc_p ) | |
904 | { | |
486bf8de | 905 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
906 | |
907 | u32 crc = *crc_p; | |
908 | u32 len_field = nl->framelen + 6; /* CRC + frameno + reserved */ | |
909 | u8 value; | |
910 | ||
911 | if( nl->state & FL_NEED_RESEND ) | |
912 | len_field |= FRAME_RETRY; /* non-first attempt... */ | |
913 | ||
914 | if( nl->outpos == 0 ) | |
915 | len_field |= FRAME_FIRST; | |
916 | ||
917 | len_field |= (nl->state & FL_PREV_OK) ? FRAME_SENT_OK : FRAME_SENT_BAD; | |
918 | outb( SBNI_SIG, dev->base_addr + DAT ); | |
919 | ||
920 | value = (u8) len_field; | |
921 | outb( value, dev->base_addr + DAT ); | |
922 | crc = CRC32( value, crc ); | |
923 | value = (u8) (len_field >> 8); | |
924 | outb( value, dev->base_addr + DAT ); | |
925 | crc = CRC32( value, crc ); | |
926 | ||
927 | outb( nl->tx_frameno, dev->base_addr + DAT ); | |
928 | crc = CRC32( nl->tx_frameno, crc ); | |
929 | outb( 0, dev->base_addr + DAT ); | |
930 | crc = CRC32( 0, crc ); | |
931 | *crc_p = crc; | |
932 | } | |
933 | ||
934 | ||
935 | /* | |
936 | * if frame tail not needed (incorrect number or received twice), | |
937 | * it won't store, but CRC will be calculated | |
938 | */ | |
939 | ||
940 | static int | |
941 | skip_tail( unsigned int ioaddr, unsigned int tail_len, u32 crc ) | |
942 | { | |
943 | while( tail_len-- ) | |
944 | crc = CRC32( inb( ioaddr + DAT ), crc ); | |
945 | ||
946 | return crc == CRC32_REMAINDER; | |
947 | } | |
948 | ||
949 | ||
950 | /* | |
951 | * Preliminary checks if frame header is correct, calculates its CRC | |
952 | * and split it to simple fields | |
953 | */ | |
954 | ||
955 | static int | |
956 | check_fhdr( u32 ioaddr, u32 *framelen, u32 *frameno, u32 *ack, | |
957 | u32 *is_first, u32 *crc_p ) | |
958 | { | |
959 | u32 crc = *crc_p; | |
960 | u8 value; | |
961 | ||
962 | if( inb( ioaddr + DAT ) != SBNI_SIG ) | |
963 | return 0; | |
964 | ||
965 | value = inb( ioaddr + DAT ); | |
966 | *framelen = (u32)value; | |
967 | crc = CRC32( value, crc ); | |
968 | value = inb( ioaddr + DAT ); | |
969 | *framelen |= ((u32)value) << 8; | |
970 | crc = CRC32( value, crc ); | |
971 | ||
972 | *ack = *framelen & FRAME_ACK_MASK; | |
973 | *is_first = (*framelen & FRAME_FIRST) != 0; | |
974 | ||
8e95a202 JP |
975 | if( (*framelen &= FRAME_LEN_MASK) < 6 || |
976 | *framelen > SBNI_MAX_FRAME - 3 ) | |
1da177e4 LT |
977 | return 0; |
978 | ||
979 | value = inb( ioaddr + DAT ); | |
980 | *frameno = (u32)value; | |
981 | crc = CRC32( value, crc ); | |
982 | ||
983 | crc = CRC32( inb( ioaddr + DAT ), crc ); /* reserved byte */ | |
984 | *framelen -= 2; | |
985 | ||
986 | *crc_p = crc; | |
987 | return 1; | |
988 | } | |
989 | ||
990 | ||
991 | static struct sk_buff * | |
992 | get_rx_buf( struct net_device *dev ) | |
993 | { | |
994 | /* +2 is to compensate for the alignment fixup below */ | |
995 | struct sk_buff *skb = dev_alloc_skb( ETHER_MAX_LEN + 2 ); | |
996 | if( !skb ) | |
997 | return NULL; | |
998 | ||
1da177e4 LT |
999 | skb_reserve( skb, 2 ); /* Align IP on longword boundaries */ |
1000 | return skb; | |
1001 | } | |
1002 | ||
1003 | ||
1004 | static void | |
1005 | indicate_pkt( struct net_device *dev ) | |
1006 | { | |
486bf8de | 1007 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
1008 | struct sk_buff *skb = nl->rx_buf_p; |
1009 | ||
1010 | skb_put( skb, nl->inppos ); | |
1011 | ||
1012 | #ifdef CONFIG_SBNI_MULTILINE | |
1013 | skb->protocol = eth_type_trans( skb, nl->master ); | |
1014 | netif_rx( skb ); | |
fe6c6fbb SH |
1015 | ++nl->master->stats.rx_packets; |
1016 | nl->master->stats.rx_bytes += nl->inppos; | |
1da177e4 LT |
1017 | #else |
1018 | skb->protocol = eth_type_trans( skb, dev ); | |
1019 | netif_rx( skb ); | |
fe6c6fbb SH |
1020 | ++dev->stats.rx_packets; |
1021 | dev->stats.rx_bytes += nl->inppos; | |
1da177e4 LT |
1022 | #endif |
1023 | nl->rx_buf_p = NULL; /* protocol driver will clear this sk_buff */ | |
1024 | } | |
1025 | ||
1026 | ||
1027 | /* -------------------------------------------------------------------------- */ | |
1028 | ||
1029 | /* | |
1030 | * Routine checks periodically wire activity and regenerates marker if | |
1031 | * connect was inactive for a long time. | |
1032 | */ | |
1033 | ||
1034 | static void | |
1035 | sbni_watchdog( unsigned long arg ) | |
1036 | { | |
1037 | struct net_device *dev = (struct net_device *) arg; | |
486bf8de | 1038 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
1039 | struct timer_list *w = &nl->watchdog; |
1040 | unsigned long flags; | |
1041 | unsigned char csr0; | |
1042 | ||
1043 | spin_lock_irqsave( &nl->lock, flags ); | |
1044 | ||
1045 | csr0 = inb( dev->base_addr + CSR0 ); | |
1046 | if( csr0 & RC_CHK ) { | |
1047 | ||
1048 | if( nl->timer_ticks ) { | |
1049 | if( csr0 & (RC_RDY | BU_EMP) ) | |
1050 | /* receiving not active */ | |
1051 | nl->timer_ticks--; | |
1052 | } else { | |
1053 | nl->in_stats.timeout_number++; | |
1054 | if( nl->delta_rxl ) | |
1055 | timeout_change_level( dev ); | |
1056 | ||
1057 | outb( *(u_char *)&nl->csr1 | PR_RES, | |
1058 | dev->base_addr + CSR1 ); | |
1059 | csr0 = inb( dev->base_addr + CSR0 ); | |
1060 | } | |
1061 | } else | |
1062 | nl->state &= ~FL_LINE_DOWN; | |
1063 | ||
1064 | outb( csr0 | RC_CHK, dev->base_addr + CSR0 ); | |
1065 | ||
1066 | init_timer( w ); | |
1067 | w->expires = jiffies + SBNI_TIMEOUT; | |
1068 | w->data = arg; | |
1069 | w->function = sbni_watchdog; | |
1070 | add_timer( w ); | |
1071 | ||
1072 | spin_unlock_irqrestore( &nl->lock, flags ); | |
1073 | } | |
1074 | ||
1075 | ||
1076 | static unsigned char rxl_tab[] = { | |
1077 | 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x08, | |
1078 | 0x0a, 0x0c, 0x0f, 0x16, 0x18, 0x1a, 0x1c, 0x1f | |
1079 | }; | |
1080 | ||
1081 | #define SIZE_OF_TIMEOUT_RXL_TAB 4 | |
1082 | static unsigned char timeout_rxl_tab[] = { | |
1083 | 0x03, 0x05, 0x08, 0x0b | |
1084 | }; | |
1085 | ||
1086 | /* -------------------------------------------------------------------------- */ | |
1087 | ||
1088 | static void | |
1089 | card_start( struct net_device *dev ) | |
1090 | { | |
486bf8de | 1091 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
1092 | |
1093 | nl->timer_ticks = CHANGE_LEVEL_START_TICKS; | |
1094 | nl->state &= ~(FL_WAIT_ACK | FL_NEED_RESEND); | |
1095 | nl->state |= FL_PREV_OK; | |
1096 | ||
1097 | nl->inppos = nl->outpos = 0; | |
1098 | nl->wait_frameno = 0; | |
1099 | nl->tx_frameno = 0; | |
1100 | nl->framelen = 0; | |
1101 | ||
1102 | outb( *(u_char *)&nl->csr1 | PR_RES, dev->base_addr + CSR1 ); | |
1103 | outb( EN_INT, dev->base_addr + CSR0 ); | |
1104 | } | |
1105 | ||
1106 | /* -------------------------------------------------------------------------- */ | |
1107 | ||
1108 | /* Receive level auto-selection */ | |
1109 | ||
1110 | static void | |
1111 | change_level( struct net_device *dev ) | |
1112 | { | |
486bf8de | 1113 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
1114 | |
1115 | if( nl->delta_rxl == 0 ) /* do not auto-negotiate RxL */ | |
1116 | return; | |
1117 | ||
1118 | if( nl->cur_rxl_index == 0 ) | |
1119 | nl->delta_rxl = 1; | |
1120 | else if( nl->cur_rxl_index == 15 ) | |
1121 | nl->delta_rxl = -1; | |
1122 | else if( nl->cur_rxl_rcvd < nl->prev_rxl_rcvd ) | |
1123 | nl->delta_rxl = -nl->delta_rxl; | |
1124 | ||
1125 | nl->csr1.rxl = rxl_tab[ nl->cur_rxl_index += nl->delta_rxl ]; | |
1126 | inb( dev->base_addr + CSR0 ); /* needs for PCI cards */ | |
1127 | outb( *(u8 *)&nl->csr1, dev->base_addr + CSR1 ); | |
1128 | ||
1129 | nl->prev_rxl_rcvd = nl->cur_rxl_rcvd; | |
1130 | nl->cur_rxl_rcvd = 0; | |
1131 | } | |
1132 | ||
1133 | ||
1134 | static void | |
1135 | timeout_change_level( struct net_device *dev ) | |
1136 | { | |
486bf8de | 1137 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
1138 | |
1139 | nl->cur_rxl_index = timeout_rxl_tab[ nl->timeout_rxl ]; | |
1140 | if( ++nl->timeout_rxl >= 4 ) | |
1141 | nl->timeout_rxl = 0; | |
1142 | ||
1143 | nl->csr1.rxl = rxl_tab[ nl->cur_rxl_index ]; | |
1144 | inb( dev->base_addr + CSR0 ); | |
1145 | outb( *(unsigned char *)&nl->csr1, dev->base_addr + CSR1 ); | |
1146 | ||
1147 | nl->prev_rxl_rcvd = nl->cur_rxl_rcvd; | |
1148 | nl->cur_rxl_rcvd = 0; | |
1149 | } | |
1150 | ||
1151 | /* -------------------------------------------------------------------------- */ | |
1152 | ||
1153 | /* | |
1154 | * Open/initialize the board. | |
1155 | */ | |
1156 | ||
1157 | static int | |
1158 | sbni_open( struct net_device *dev ) | |
1159 | { | |
486bf8de | 1160 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
1161 | struct timer_list *w = &nl->watchdog; |
1162 | ||
1163 | /* | |
1164 | * For double ISA adapters within "common irq" mode, we have to | |
1165 | * determine whether primary or secondary channel is initialized, | |
1166 | * and set the irq handler only in first case. | |
1167 | */ | |
1168 | if( dev->base_addr < 0x400 ) { /* ISA only */ | |
1169 | struct net_device **p = sbni_cards; | |
1170 | for( ; *p && p < sbni_cards + SBNI_MAX_NUM_CARDS; ++p ) | |
8e95a202 JP |
1171 | if( (*p)->irq == dev->irq && |
1172 | ((*p)->base_addr == dev->base_addr + 4 || | |
1173 | (*p)->base_addr == dev->base_addr - 4) && | |
1174 | (*p)->flags & IFF_UP ) { | |
1da177e4 | 1175 | |
486bf8de | 1176 | ((struct net_local *) (netdev_priv(*p))) |
1da177e4 | 1177 | ->second = dev; |
23efcb73 JP |
1178 | netdev_notice(dev, "using shared irq with %s\n", |
1179 | (*p)->name); | |
1da177e4 LT |
1180 | nl->state |= FL_SECONDARY; |
1181 | goto handler_attached; | |
1182 | } | |
1183 | } | |
1184 | ||
1fb9df5d | 1185 | if( request_irq(dev->irq, sbni_interrupt, IRQF_SHARED, dev->name, dev) ) { |
23efcb73 | 1186 | netdev_err(dev, "unable to get IRQ %d\n", dev->irq); |
1da177e4 LT |
1187 | return -EAGAIN; |
1188 | } | |
1189 | ||
1190 | handler_attached: | |
1191 | ||
1192 | spin_lock( &nl->lock ); | |
fe6c6fbb | 1193 | memset( &dev->stats, 0, sizeof(struct net_device_stats) ); |
1da177e4 LT |
1194 | memset( &nl->in_stats, 0, sizeof(struct sbni_in_stats) ); |
1195 | ||
1196 | card_start( dev ); | |
1197 | ||
1198 | netif_start_queue( dev ); | |
1199 | ||
1200 | /* set timer watchdog */ | |
1201 | init_timer( w ); | |
1202 | w->expires = jiffies + SBNI_TIMEOUT; | |
1203 | w->data = (unsigned long) dev; | |
1204 | w->function = sbni_watchdog; | |
1205 | add_timer( w ); | |
1206 | ||
1207 | spin_unlock( &nl->lock ); | |
1208 | return 0; | |
1209 | } | |
1210 | ||
1211 | ||
1212 | static int | |
1213 | sbni_close( struct net_device *dev ) | |
1214 | { | |
486bf8de | 1215 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
1216 | |
1217 | if( nl->second && nl->second->flags & IFF_UP ) { | |
23efcb73 JP |
1218 | netdev_notice(dev, "Secondary channel (%s) is active!\n", |
1219 | nl->second->name); | |
1da177e4 LT |
1220 | return -EBUSY; |
1221 | } | |
1222 | ||
1223 | #ifdef CONFIG_SBNI_MULTILINE | |
1224 | if( nl->state & FL_SLAVE ) | |
1225 | emancipate( dev ); | |
1226 | else | |
1227 | while( nl->link ) /* it's master device! */ | |
1228 | emancipate( nl->link ); | |
1229 | #endif | |
1230 | ||
1231 | spin_lock( &nl->lock ); | |
1232 | ||
1233 | nl->second = NULL; | |
1234 | drop_xmit_queue( dev ); | |
1235 | netif_stop_queue( dev ); | |
1236 | ||
1237 | del_timer( &nl->watchdog ); | |
1238 | ||
1239 | outb( 0, dev->base_addr + CSR0 ); | |
1240 | ||
1241 | if( !(nl->state & FL_SECONDARY) ) | |
1242 | free_irq( dev->irq, dev ); | |
1243 | nl->state &= FL_SECONDARY; | |
1244 | ||
1245 | spin_unlock( &nl->lock ); | |
1246 | return 0; | |
1247 | } | |
1248 | ||
1249 | ||
1250 | /* | |
1251 | Valid combinations in CSR0 (for probing): | |
1252 | ||
1253 | VALID_DECODER 0000,0011,1011,1010 | |
1254 | ||
1255 | ; 0 ; - | |
1256 | TR_REQ ; 1 ; + | |
1257 | TR_RDY ; 2 ; - | |
1258 | TR_RDY TR_REQ ; 3 ; + | |
1259 | BU_EMP ; 4 ; + | |
1260 | BU_EMP TR_REQ ; 5 ; + | |
1261 | BU_EMP TR_RDY ; 6 ; - | |
1262 | BU_EMP TR_RDY TR_REQ ; 7 ; + | |
1263 | RC_RDY ; 8 ; + | |
1264 | RC_RDY TR_REQ ; 9 ; + | |
1265 | RC_RDY TR_RDY ; 10 ; - | |
1266 | RC_RDY TR_RDY TR_REQ ; 11 ; - | |
1267 | RC_RDY BU_EMP ; 12 ; - | |
1268 | RC_RDY BU_EMP TR_REQ ; 13 ; - | |
1269 | RC_RDY BU_EMP TR_RDY ; 14 ; - | |
1270 | RC_RDY BU_EMP TR_RDY TR_REQ ; 15 ; - | |
1271 | */ | |
1272 | ||
1273 | #define VALID_DECODER (2 + 8 + 0x10 + 0x20 + 0x80 + 0x100 + 0x200) | |
1274 | ||
1275 | ||
1276 | static int | |
1277 | sbni_card_probe( unsigned long ioaddr ) | |
1278 | { | |
1279 | unsigned char csr0; | |
1280 | ||
1281 | csr0 = inb( ioaddr + CSR0 ); | |
1282 | if( csr0 != 0xff && csr0 != 0x00 ) { | |
1283 | csr0 &= ~EN_INT; | |
1284 | if( csr0 & BU_EMP ) | |
1285 | csr0 |= EN_INT; | |
1286 | ||
1287 | if( VALID_DECODER & (1 << (csr0 >> 4)) ) | |
1288 | return 0; | |
1289 | } | |
1290 | ||
1291 | return -ENODEV; | |
1292 | } | |
1293 | ||
1294 | /* -------------------------------------------------------------------------- */ | |
1295 | ||
1296 | static int | |
1297 | sbni_ioctl( struct net_device *dev, struct ifreq *ifr, int cmd ) | |
1298 | { | |
486bf8de | 1299 | struct net_local *nl = netdev_priv(dev); |
1da177e4 LT |
1300 | struct sbni_flags flags; |
1301 | int error = 0; | |
1302 | ||
1303 | #ifdef CONFIG_SBNI_MULTILINE | |
1304 | struct net_device *slave_dev; | |
1305 | char slave_name[ 8 ]; | |
1306 | #endif | |
1307 | ||
1308 | switch( cmd ) { | |
1309 | case SIOCDEVGETINSTATS : | |
1310 | if (copy_to_user( ifr->ifr_data, &nl->in_stats, | |
1311 | sizeof(struct sbni_in_stats) )) | |
1312 | error = -EFAULT; | |
1313 | break; | |
1314 | ||
1315 | case SIOCDEVRESINSTATS : | |
f2455eb1 | 1316 | if (!capable(CAP_NET_ADMIN)) |
1da177e4 LT |
1317 | return -EPERM; |
1318 | memset( &nl->in_stats, 0, sizeof(struct sbni_in_stats) ); | |
1319 | break; | |
1320 | ||
1321 | case SIOCDEVGHWSTATE : | |
1322 | flags.mac_addr = *(u32 *)(dev->dev_addr + 3); | |
1323 | flags.rate = nl->csr1.rate; | |
1324 | flags.slow_mode = (nl->state & FL_SLOW_MODE) != 0; | |
1325 | flags.rxl = nl->cur_rxl_index; | |
1326 | flags.fixed_rxl = nl->delta_rxl == 0; | |
1327 | ||
1328 | if (copy_to_user( ifr->ifr_data, &flags, sizeof flags )) | |
1329 | error = -EFAULT; | |
1330 | break; | |
1331 | ||
1332 | case SIOCDEVSHWSTATE : | |
f2455eb1 | 1333 | if (!capable(CAP_NET_ADMIN)) |
1da177e4 LT |
1334 | return -EPERM; |
1335 | ||
1336 | spin_lock( &nl->lock ); | |
1337 | flags = *(struct sbni_flags*) &ifr->ifr_ifru; | |
1338 | if( flags.fixed_rxl ) | |
1339 | nl->delta_rxl = 0, | |
1340 | nl->cur_rxl_index = flags.rxl; | |
1341 | else | |
1342 | nl->delta_rxl = DEF_RXL_DELTA, | |
1343 | nl->cur_rxl_index = DEF_RXL; | |
1344 | ||
1345 | nl->csr1.rxl = rxl_tab[ nl->cur_rxl_index ]; | |
1346 | nl->csr1.rate = flags.rate; | |
1347 | outb( *(u8 *)&nl->csr1 | PR_RES, dev->base_addr + CSR1 ); | |
1348 | spin_unlock( &nl->lock ); | |
1349 | break; | |
1350 | ||
1351 | #ifdef CONFIG_SBNI_MULTILINE | |
1352 | ||
1353 | case SIOCDEVENSLAVE : | |
f2455eb1 | 1354 | if (!capable(CAP_NET_ADMIN)) |
1da177e4 LT |
1355 | return -EPERM; |
1356 | ||
1357 | if (copy_from_user( slave_name, ifr->ifr_data, sizeof slave_name )) | |
1358 | return -EFAULT; | |
881d966b | 1359 | slave_dev = dev_get_by_name(&init_net, slave_name ); |
1da177e4 | 1360 | if( !slave_dev || !(slave_dev->flags & IFF_UP) ) { |
23efcb73 JP |
1361 | netdev_err(dev, "trying to enslave non-active device %s\n", |
1362 | slave_name); | |
1da177e4 LT |
1363 | return -EPERM; |
1364 | } | |
1365 | ||
1366 | return enslave( dev, slave_dev ); | |
1367 | ||
1368 | case SIOCDEVEMANSIPATE : | |
f2455eb1 | 1369 | if (!capable(CAP_NET_ADMIN)) |
1da177e4 LT |
1370 | return -EPERM; |
1371 | ||
1372 | return emancipate( dev ); | |
1373 | ||
1374 | #endif /* CONFIG_SBNI_MULTILINE */ | |
1375 | ||
1376 | default : | |
1377 | return -EOPNOTSUPP; | |
1378 | } | |
1379 | ||
1380 | return error; | |
1381 | } | |
1382 | ||
1383 | ||
1384 | #ifdef CONFIG_SBNI_MULTILINE | |
1385 | ||
1386 | static int | |
1387 | enslave( struct net_device *dev, struct net_device *slave_dev ) | |
1388 | { | |
486bf8de WC |
1389 | struct net_local *nl = netdev_priv(dev); |
1390 | struct net_local *snl = netdev_priv(slave_dev); | |
1da177e4 LT |
1391 | |
1392 | if( nl->state & FL_SLAVE ) /* This isn't master or free device */ | |
1393 | return -EBUSY; | |
1394 | ||
1395 | if( snl->state & FL_SLAVE ) /* That was already enslaved */ | |
1396 | return -EBUSY; | |
1397 | ||
1398 | spin_lock( &nl->lock ); | |
1399 | spin_lock( &snl->lock ); | |
1400 | ||
1401 | /* append to list */ | |
1402 | snl->link = nl->link; | |
1403 | nl->link = slave_dev; | |
1404 | snl->master = dev; | |
1405 | snl->state |= FL_SLAVE; | |
1406 | ||
1407 | /* Summary statistics of MultiLine operation will be stored | |
1408 | in master's counters */ | |
fe6c6fbb | 1409 | memset( &slave_dev->stats, 0, sizeof(struct net_device_stats) ); |
1da177e4 LT |
1410 | netif_stop_queue( slave_dev ); |
1411 | netif_wake_queue( dev ); /* Now we are able to transmit */ | |
1412 | ||
1413 | spin_unlock( &snl->lock ); | |
1414 | spin_unlock( &nl->lock ); | |
23efcb73 | 1415 | netdev_notice(dev, "slave device (%s) attached\n", slave_dev->name); |
1da177e4 LT |
1416 | return 0; |
1417 | } | |
1418 | ||
1419 | ||
1420 | static int | |
1421 | emancipate( struct net_device *dev ) | |
1422 | { | |
486bf8de | 1423 | struct net_local *snl = netdev_priv(dev); |
1da177e4 | 1424 | struct net_device *p = snl->master; |
486bf8de | 1425 | struct net_local *nl = netdev_priv(p); |
1da177e4 LT |
1426 | |
1427 | if( !(snl->state & FL_SLAVE) ) | |
1428 | return -EINVAL; | |
1429 | ||
1430 | spin_lock( &nl->lock ); | |
1431 | spin_lock( &snl->lock ); | |
1432 | drop_xmit_queue( dev ); | |
1433 | ||
1434 | /* exclude from list */ | |
1435 | for(;;) { /* must be in list */ | |
486bf8de | 1436 | struct net_local *t = netdev_priv(p); |
1da177e4 LT |
1437 | if( t->link == dev ) { |
1438 | t->link = snl->link; | |
1439 | break; | |
1440 | } | |
1441 | p = t->link; | |
1442 | } | |
1443 | ||
1444 | snl->link = NULL; | |
1445 | snl->master = dev; | |
1446 | snl->state &= ~FL_SLAVE; | |
1447 | ||
1448 | netif_start_queue( dev ); | |
1449 | ||
1450 | spin_unlock( &snl->lock ); | |
1451 | spin_unlock( &nl->lock ); | |
1452 | ||
1453 | dev_put( dev ); | |
1454 | return 0; | |
1455 | } | |
1456 | ||
1457 | #endif | |
1458 | ||
1da177e4 LT |
1459 | static void |
1460 | set_multicast_list( struct net_device *dev ) | |
1461 | { | |
1462 | return; /* sbni always operate in promiscuos mode */ | |
1463 | } | |
1464 | ||
1465 | ||
1466 | #ifdef MODULE | |
1467 | module_param_array(io, int, NULL, 0); | |
1468 | module_param_array(irq, int, NULL, 0); | |
1469 | module_param_array(baud, int, NULL, 0); | |
1470 | module_param_array(rxl, int, NULL, 0); | |
1471 | module_param_array(mac, int, NULL, 0); | |
1472 | module_param(skip_pci_probe, bool, 0); | |
1473 | ||
1474 | MODULE_LICENSE("GPL"); | |
1475 | ||
1476 | ||
471a24c0 | 1477 | int __init init_module( void ) |
1da177e4 LT |
1478 | { |
1479 | struct net_device *dev; | |
1480 | int err; | |
1481 | ||
1482 | while( num < SBNI_MAX_NUM_CARDS ) { | |
1483 | dev = alloc_netdev(sizeof(struct net_local), | |
1484 | "sbni%d", sbni_devsetup); | |
1485 | if( !dev) | |
1486 | break; | |
1487 | ||
1488 | sprintf( dev->name, "sbni%d", num ); | |
1489 | ||
1490 | err = sbni_init(dev); | |
1491 | if (err) { | |
1492 | free_netdev(dev); | |
1493 | break; | |
1494 | } | |
1495 | ||
1496 | if( register_netdev( dev ) ) { | |
1497 | release_region( dev->base_addr, SBNI_IO_EXTENT ); | |
1498 | free_netdev( dev ); | |
1499 | break; | |
1500 | } | |
1501 | } | |
1502 | ||
1503 | return *sbni_cards ? 0 : -ENODEV; | |
1504 | } | |
1505 | ||
1506 | void | |
5ed1e981 | 1507 | cleanup_module(void) |
1da177e4 | 1508 | { |
5ed1e981 | 1509 | int i; |
1da177e4 | 1510 | |
5ed1e981 HE |
1511 | for (i = 0; i < SBNI_MAX_NUM_CARDS; ++i) { |
1512 | struct net_device *dev = sbni_cards[i]; | |
1513 | if (dev != NULL) { | |
1514 | unregister_netdev(dev); | |
1515 | release_region(dev->base_addr, SBNI_IO_EXTENT); | |
1516 | free_netdev(dev); | |
1da177e4 | 1517 | } |
5ed1e981 | 1518 | } |
1da177e4 LT |
1519 | } |
1520 | ||
1521 | #else /* MODULE */ | |
1522 | ||
1523 | static int __init | |
1524 | sbni_setup( char *p ) | |
1525 | { | |
1526 | int n, parm; | |
1527 | ||
1528 | if( *p++ != '(' ) | |
1529 | goto bad_param; | |
1530 | ||
1531 | for( n = 0, parm = 0; *p && n < 8; ) { | |
1532 | (*dest[ parm ])[ n ] = simple_strtol( p, &p, 0 ); | |
1533 | if( !*p || *p == ')' ) | |
1534 | return 1; | |
1535 | if( *p == ';' ) | |
1536 | ++p, ++n, parm = 0; | |
1537 | else if( *p++ != ',' ) | |
1538 | break; | |
1539 | else | |
1540 | if( ++parm >= 5 ) | |
1541 | break; | |
1542 | } | |
1543 | bad_param: | |
23efcb73 | 1544 | pr_err("Error in sbni kernel parameter!\n"); |
1da177e4 LT |
1545 | return 0; |
1546 | } | |
1547 | ||
1548 | __setup( "sbni=", sbni_setup ); | |
1549 | ||
1550 | #endif /* MODULE */ | |
1551 | ||
1552 | /* -------------------------------------------------------------------------- */ | |
1553 | ||
1554 | #ifdef ASM_CRC | |
1555 | ||
1556 | static u32 | |
1557 | calc_crc32( u32 crc, u8 *p, u32 len ) | |
1558 | { | |
1559 | register u32 _crc; | |
1560 | _crc = crc; | |
1561 | ||
1562 | __asm__ __volatile__ ( | |
1563 | "xorl %%ebx, %%ebx\n" | |
1564 | "movl %2, %%esi\n" | |
1565 | "movl %3, %%ecx\n" | |
1566 | "movl $crc32tab, %%edi\n" | |
1567 | "shrl $2, %%ecx\n" | |
1568 | "jz 1f\n" | |
1569 | ||
1570 | ".align 4\n" | |
1571 | "0:\n" | |
1572 | "movb %%al, %%bl\n" | |
1573 | "movl (%%esi), %%edx\n" | |
1574 | "shrl $8, %%eax\n" | |
1575 | "xorb %%dl, %%bl\n" | |
1576 | "shrl $8, %%edx\n" | |
1577 | "xorl (%%edi,%%ebx,4), %%eax\n" | |
1578 | ||
1579 | "movb %%al, %%bl\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 | "movb %%dh, %%dl\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 | "addl $4, %%esi\n" | |
1595 | "xorl (%%edi,%%ebx,4), %%eax\n" | |
1596 | ||
1597 | "decl %%ecx\n" | |
1598 | "jnz 0b\n" | |
1599 | ||
1600 | "1:\n" | |
1601 | "movl %3, %%ecx\n" | |
1602 | "andl $3, %%ecx\n" | |
1603 | "jz 2f\n" | |
1604 | ||
1605 | "movb %%al, %%bl\n" | |
1606 | "shrl $8, %%eax\n" | |
1607 | "xorb (%%esi), %%bl\n" | |
1608 | "xorl (%%edi,%%ebx,4), %%eax\n" | |
1609 | ||
1610 | "decl %%ecx\n" | |
1611 | "jz 2f\n" | |
1612 | ||
1613 | "movb %%al, %%bl\n" | |
1614 | "shrl $8, %%eax\n" | |
1615 | "xorb 1(%%esi), %%bl\n" | |
1616 | "xorl (%%edi,%%ebx,4), %%eax\n" | |
1617 | ||
1618 | "decl %%ecx\n" | |
1619 | "jz 2f\n" | |
1620 | ||
1621 | "movb %%al, %%bl\n" | |
1622 | "shrl $8, %%eax\n" | |
1623 | "xorb 2(%%esi), %%bl\n" | |
1624 | "xorl (%%edi,%%ebx,4), %%eax\n" | |
1625 | "2:\n" | |
1626 | : "=a" (_crc) | |
1627 | : "0" (_crc), "g" (p), "g" (len) | |
1628 | : "bx", "cx", "dx", "si", "di" | |
1629 | ); | |
1630 | ||
1631 | return _crc; | |
1632 | } | |
1633 | ||
1634 | #else /* ASM_CRC */ | |
1635 | ||
1636 | static u32 | |
1637 | calc_crc32( u32 crc, u8 *p, u32 len ) | |
1638 | { | |
1639 | while( len-- ) | |
1640 | crc = CRC32( *p++, crc ); | |
1641 | ||
1642 | return crc; | |
1643 | } | |
1644 | ||
1645 | #endif /* ASM_CRC */ | |
1646 | ||
1647 | ||
1648 | static u32 crc32tab[] __attribute__ ((aligned(8))) = { | |
1649 | 0xD202EF8D, 0xA505DF1B, 0x3C0C8EA1, 0x4B0BBE37, | |
1650 | 0xD56F2B94, 0xA2681B02, 0x3B614AB8, 0x4C667A2E, | |
1651 | 0xDCD967BF, 0xABDE5729, 0x32D70693, 0x45D03605, | |
1652 | 0xDBB4A3A6, 0xACB39330, 0x35BAC28A, 0x42BDF21C, | |
1653 | 0xCFB5FFE9, 0xB8B2CF7F, 0x21BB9EC5, 0x56BCAE53, | |
1654 | 0xC8D83BF0, 0xBFDF0B66, 0x26D65ADC, 0x51D16A4A, | |
1655 | 0xC16E77DB, 0xB669474D, 0x2F6016F7, 0x58672661, | |
1656 | 0xC603B3C2, 0xB1048354, 0x280DD2EE, 0x5F0AE278, | |
1657 | 0xE96CCF45, 0x9E6BFFD3, 0x0762AE69, 0x70659EFF, | |
1658 | 0xEE010B5C, 0x99063BCA, 0x000F6A70, 0x77085AE6, | |
1659 | 0xE7B74777, 0x90B077E1, 0x09B9265B, 0x7EBE16CD, | |
1660 | 0xE0DA836E, 0x97DDB3F8, 0x0ED4E242, 0x79D3D2D4, | |
1661 | 0xF4DBDF21, 0x83DCEFB7, 0x1AD5BE0D, 0x6DD28E9B, | |
1662 | 0xF3B61B38, 0x84B12BAE, 0x1DB87A14, 0x6ABF4A82, | |
1663 | 0xFA005713, 0x8D076785, 0x140E363F, 0x630906A9, | |
1664 | 0xFD6D930A, 0x8A6AA39C, 0x1363F226, 0x6464C2B0, | |
1665 | 0xA4DEAE1D, 0xD3D99E8B, 0x4AD0CF31, 0x3DD7FFA7, | |
1666 | 0xA3B36A04, 0xD4B45A92, 0x4DBD0B28, 0x3ABA3BBE, | |
1667 | 0xAA05262F, 0xDD0216B9, 0x440B4703, 0x330C7795, | |
1668 | 0xAD68E236, 0xDA6FD2A0, 0x4366831A, 0x3461B38C, | |
1669 | 0xB969BE79, 0xCE6E8EEF, 0x5767DF55, 0x2060EFC3, | |
1670 | 0xBE047A60, 0xC9034AF6, 0x500A1B4C, 0x270D2BDA, | |
1671 | 0xB7B2364B, 0xC0B506DD, 0x59BC5767, 0x2EBB67F1, | |
1672 | 0xB0DFF252, 0xC7D8C2C4, 0x5ED1937E, 0x29D6A3E8, | |
1673 | 0x9FB08ED5, 0xE8B7BE43, 0x71BEEFF9, 0x06B9DF6F, | |
1674 | 0x98DD4ACC, 0xEFDA7A5A, 0x76D32BE0, 0x01D41B76, | |
1675 | 0x916B06E7, 0xE66C3671, 0x7F6567CB, 0x0862575D, | |
1676 | 0x9606C2FE, 0xE101F268, 0x7808A3D2, 0x0F0F9344, | |
1677 | 0x82079EB1, 0xF500AE27, 0x6C09FF9D, 0x1B0ECF0B, | |
1678 | 0x856A5AA8, 0xF26D6A3E, 0x6B643B84, 0x1C630B12, | |
1679 | 0x8CDC1683, 0xFBDB2615, 0x62D277AF, 0x15D54739, | |
1680 | 0x8BB1D29A, 0xFCB6E20C, 0x65BFB3B6, 0x12B88320, | |
1681 | 0x3FBA6CAD, 0x48BD5C3B, 0xD1B40D81, 0xA6B33D17, | |
1682 | 0x38D7A8B4, 0x4FD09822, 0xD6D9C998, 0xA1DEF90E, | |
1683 | 0x3161E49F, 0x4666D409, 0xDF6F85B3, 0xA868B525, | |
1684 | 0x360C2086, 0x410B1010, 0xD80241AA, 0xAF05713C, | |
1685 | 0x220D7CC9, 0x550A4C5F, 0xCC031DE5, 0xBB042D73, | |
1686 | 0x2560B8D0, 0x52678846, 0xCB6ED9FC, 0xBC69E96A, | |
1687 | 0x2CD6F4FB, 0x5BD1C46D, 0xC2D895D7, 0xB5DFA541, | |
1688 | 0x2BBB30E2, 0x5CBC0074, 0xC5B551CE, 0xB2B26158, | |
1689 | 0x04D44C65, 0x73D37CF3, 0xEADA2D49, 0x9DDD1DDF, | |
1690 | 0x03B9887C, 0x74BEB8EA, 0xEDB7E950, 0x9AB0D9C6, | |
1691 | 0x0A0FC457, 0x7D08F4C1, 0xE401A57B, 0x930695ED, | |
1692 | 0x0D62004E, 0x7A6530D8, 0xE36C6162, 0x946B51F4, | |
1693 | 0x19635C01, 0x6E646C97, 0xF76D3D2D, 0x806A0DBB, | |
1694 | 0x1E0E9818, 0x6909A88E, 0xF000F934, 0x8707C9A2, | |
1695 | 0x17B8D433, 0x60BFE4A5, 0xF9B6B51F, 0x8EB18589, | |
1696 | 0x10D5102A, 0x67D220BC, 0xFEDB7106, 0x89DC4190, | |
1697 | 0x49662D3D, 0x3E611DAB, 0xA7684C11, 0xD06F7C87, | |
1698 | 0x4E0BE924, 0x390CD9B2, 0xA0058808, 0xD702B89E, | |
1699 | 0x47BDA50F, 0x30BA9599, 0xA9B3C423, 0xDEB4F4B5, | |
1700 | 0x40D06116, 0x37D75180, 0xAEDE003A, 0xD9D930AC, | |
1701 | 0x54D13D59, 0x23D60DCF, 0xBADF5C75, 0xCDD86CE3, | |
1702 | 0x53BCF940, 0x24BBC9D6, 0xBDB2986C, 0xCAB5A8FA, | |
1703 | 0x5A0AB56B, 0x2D0D85FD, 0xB404D447, 0xC303E4D1, | |
1704 | 0x5D677172, 0x2A6041E4, 0xB369105E, 0xC46E20C8, | |
1705 | 0x72080DF5, 0x050F3D63, 0x9C066CD9, 0xEB015C4F, | |
1706 | 0x7565C9EC, 0x0262F97A, 0x9B6BA8C0, 0xEC6C9856, | |
1707 | 0x7CD385C7, 0x0BD4B551, 0x92DDE4EB, 0xE5DAD47D, | |
1708 | 0x7BBE41DE, 0x0CB97148, 0x95B020F2, 0xE2B71064, | |
1709 | 0x6FBF1D91, 0x18B82D07, 0x81B17CBD, 0xF6B64C2B, | |
1710 | 0x68D2D988, 0x1FD5E91E, 0x86DCB8A4, 0xF1DB8832, | |
1711 | 0x616495A3, 0x1663A535, 0x8F6AF48F, 0xF86DC419, | |
1712 | 0x660951BA, 0x110E612C, 0x88073096, 0xFF000000 | |
1713 | }; | |
1714 |