Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 57 | #include <net/net_namespace.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 123 | static irqreturn_t sbni_interrupt( int, void * ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 189 | |
| 190 | /* |
| 191 | * Look for SBNI card which addr stored in dev->base_addr, if nonzero. |
| 192 | * Otherwise, look through PCI bus. If none PCI-card was found, scan ISA. |
| 193 | */ |
| 194 | |
| 195 | static inline int __init |
| 196 | sbni_isa_probe( struct net_device *dev ) |
| 197 | { |
| 198 | if( dev->base_addr > 0x1ff |
| 199 | && request_region( dev->base_addr, SBNI_IO_EXTENT, dev->name ) |
| 200 | && sbni_probe1( dev, dev->base_addr, dev->irq ) ) |
| 201 | |
| 202 | return 0; |
| 203 | else { |
| 204 | printk( KERN_ERR "sbni: base address 0x%lx is busy, or adapter " |
| 205 | "is malfunctional!\n", dev->base_addr ); |
| 206 | return -ENODEV; |
| 207 | } |
| 208 | } |
| 209 | |
| 210 | static void __init sbni_devsetup(struct net_device *dev) |
| 211 | { |
| 212 | ether_setup( dev ); |
| 213 | dev->open = &sbni_open; |
| 214 | dev->stop = &sbni_close; |
| 215 | dev->hard_start_xmit = &sbni_start_xmit; |
| 216 | dev->get_stats = &sbni_get_stats; |
| 217 | dev->set_multicast_list = &set_multicast_list; |
| 218 | dev->do_ioctl = &sbni_ioctl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | } |
| 220 | |
| 221 | int __init sbni_probe(int unit) |
| 222 | { |
| 223 | struct net_device *dev; |
| 224 | static unsigned version_printed __initdata = 0; |
| 225 | int err; |
| 226 | |
| 227 | dev = alloc_netdev(sizeof(struct net_local), "sbni", sbni_devsetup); |
| 228 | if (!dev) |
| 229 | return -ENOMEM; |
| 230 | |
| 231 | sprintf(dev->name, "sbni%d", unit); |
| 232 | netdev_boot_setup_check(dev); |
| 233 | |
| 234 | err = sbni_init(dev); |
| 235 | if (err) { |
| 236 | free_netdev(dev); |
| 237 | return err; |
| 238 | } |
| 239 | |
| 240 | err = register_netdev(dev); |
| 241 | if (err) { |
| 242 | release_region( dev->base_addr, SBNI_IO_EXTENT ); |
| 243 | free_netdev(dev); |
| 244 | return err; |
| 245 | } |
| 246 | if( version_printed++ == 0 ) |
| 247 | printk( KERN_INFO "%s", version ); |
| 248 | return 0; |
| 249 | } |
| 250 | |
| 251 | static int __init sbni_init(struct net_device *dev) |
| 252 | { |
| 253 | int i; |
| 254 | if( dev->base_addr ) |
| 255 | return sbni_isa_probe( dev ); |
| 256 | /* otherwise we have to perform search our adapter */ |
| 257 | |
| 258 | if( io[ num ] != -1 ) |
| 259 | dev->base_addr = io[ num ], |
| 260 | dev->irq = irq[ num ]; |
| 261 | else if( scandone || io[ 0 ] != -1 ) |
| 262 | return -ENODEV; |
| 263 | |
| 264 | /* if io[ num ] contains non-zero address, then that is on ISA bus */ |
| 265 | if( dev->base_addr ) |
| 266 | return sbni_isa_probe( dev ); |
| 267 | |
| 268 | /* ...otherwise - scan PCI first */ |
| 269 | if( !skip_pci_probe && !sbni_pci_probe( dev ) ) |
| 270 | return 0; |
| 271 | |
| 272 | if( io[ num ] == -1 ) { |
| 273 | /* Auto-scan will be stopped when first ISA card were found */ |
| 274 | scandone = 1; |
| 275 | if( num > 0 ) |
| 276 | return -ENODEV; |
| 277 | } |
| 278 | |
| 279 | for( i = 0; netcard_portlist[ i ]; ++i ) { |
| 280 | int ioaddr = netcard_portlist[ i ]; |
| 281 | if( request_region( ioaddr, SBNI_IO_EXTENT, dev->name ) |
| 282 | && sbni_probe1( dev, ioaddr, 0 )) |
| 283 | return 0; |
| 284 | } |
| 285 | |
| 286 | return -ENODEV; |
| 287 | } |
| 288 | |
| 289 | |
| 290 | int __init |
| 291 | sbni_pci_probe( struct net_device *dev ) |
| 292 | { |
| 293 | struct pci_dev *pdev = NULL; |
| 294 | |
| 295 | while( (pdev = pci_get_class( PCI_CLASS_NETWORK_OTHER << 8, pdev )) |
| 296 | != NULL ) { |
| 297 | int pci_irq_line; |
| 298 | unsigned long pci_ioaddr; |
| 299 | u16 subsys; |
| 300 | |
| 301 | if( pdev->vendor != SBNI_PCI_VENDOR |
| 302 | && pdev->device != SBNI_PCI_DEVICE ) |
| 303 | continue; |
| 304 | |
| 305 | pci_ioaddr = pci_resource_start( pdev, 0 ); |
| 306 | pci_irq_line = pdev->irq; |
| 307 | |
| 308 | /* Avoid already found cards from previous calls */ |
| 309 | if( !request_region( pci_ioaddr, SBNI_IO_EXTENT, dev->name ) ) { |
| 310 | pci_read_config_word( pdev, PCI_SUBSYSTEM_ID, &subsys ); |
| 311 | |
| 312 | if (subsys != 2) |
| 313 | continue; |
| 314 | |
| 315 | /* Dual adapter is present */ |
| 316 | if (!request_region(pci_ioaddr += 4, SBNI_IO_EXTENT, |
| 317 | dev->name ) ) |
| 318 | continue; |
| 319 | } |
| 320 | |
| 321 | if( pci_irq_line <= 0 || pci_irq_line >= NR_IRQS ) |
| 322 | printk( KERN_WARNING " WARNING: The PCI BIOS assigned " |
| 323 | "this PCI card to IRQ %d, which is unlikely " |
| 324 | "to work!.\n" |
| 325 | KERN_WARNING " You should use the PCI BIOS " |
| 326 | "setup to assign a valid IRQ line.\n", |
| 327 | pci_irq_line ); |
| 328 | |
| 329 | /* avoiding re-enable dual adapters */ |
| 330 | if( (pci_ioaddr & 7) == 0 && pci_enable_device( pdev ) ) { |
| 331 | release_region( pci_ioaddr, SBNI_IO_EXTENT ); |
| 332 | pci_dev_put( pdev ); |
| 333 | return -EIO; |
| 334 | } |
| 335 | if( sbni_probe1( dev, pci_ioaddr, pci_irq_line ) ) { |
| 336 | SET_NETDEV_DEV(dev, &pdev->dev); |
| 337 | /* not the best thing to do, but this is all messed up |
| 338 | for hotplug systems anyway... */ |
| 339 | pci_dev_put( pdev ); |
| 340 | return 0; |
| 341 | } |
| 342 | } |
| 343 | return -ENODEV; |
| 344 | } |
| 345 | |
| 346 | |
| 347 | static struct net_device * __init |
| 348 | sbni_probe1( struct net_device *dev, unsigned long ioaddr, int irq ) |
| 349 | { |
| 350 | struct net_local *nl; |
| 351 | |
| 352 | if( sbni_card_probe( ioaddr ) ) { |
| 353 | release_region( ioaddr, SBNI_IO_EXTENT ); |
| 354 | return NULL; |
| 355 | } |
| 356 | |
| 357 | outb( 0, ioaddr + CSR0 ); |
| 358 | |
| 359 | if( irq < 2 ) { |
| 360 | unsigned long irq_mask; |
| 361 | |
| 362 | irq_mask = probe_irq_on(); |
| 363 | outb( EN_INT | TR_REQ, ioaddr + CSR0 ); |
| 364 | outb( PR_RES, ioaddr + CSR1 ); |
| 365 | mdelay(50); |
| 366 | irq = probe_irq_off(irq_mask); |
| 367 | outb( 0, ioaddr + CSR0 ); |
| 368 | |
| 369 | if( !irq ) { |
| 370 | printk( KERN_ERR "%s: can't detect device irq!\n", |
| 371 | dev->name ); |
| 372 | release_region( ioaddr, SBNI_IO_EXTENT ); |
| 373 | return NULL; |
| 374 | } |
| 375 | } else if( irq == 2 ) |
| 376 | irq = 9; |
| 377 | |
| 378 | dev->irq = irq; |
| 379 | dev->base_addr = ioaddr; |
| 380 | |
| 381 | /* Allocate dev->priv and fill in sbni-specific dev fields. */ |
| 382 | nl = dev->priv; |
| 383 | if( !nl ) { |
| 384 | printk( KERN_ERR "%s: unable to get memory!\n", dev->name ); |
| 385 | release_region( ioaddr, SBNI_IO_EXTENT ); |
| 386 | return NULL; |
| 387 | } |
| 388 | |
| 389 | dev->priv = nl; |
| 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) */ |
| 394 | *(u16 *)dev->dev_addr = htons( 0x00ff ); |
| 395 | *(u32 *)(dev->dev_addr + 2) = htonl( 0x01000000 | |
| 396 | ( (mac[num] ? mac[num] : (u32)((long)dev->priv)) & 0x00ffffff) ); |
| 397 | |
| 398 | /* store link settings (speed, receive level ) */ |
| 399 | nl->maxframe = DEFAULT_FRAME_LEN; |
| 400 | nl->csr1.rate = baud[ num ]; |
| 401 | |
| 402 | if( (nl->cur_rxl_index = rxl[ num ]) == -1 ) |
| 403 | /* autotune rxl */ |
| 404 | nl->cur_rxl_index = DEF_RXL, |
| 405 | nl->delta_rxl = DEF_RXL_DELTA; |
| 406 | else |
| 407 | nl->delta_rxl = 0; |
| 408 | nl->csr1.rxl = rxl_tab[ nl->cur_rxl_index ]; |
| 409 | if( inb( ioaddr + CSR0 ) & 0x01 ) |
| 410 | nl->state |= FL_SLOW_MODE; |
| 411 | |
| 412 | printk( KERN_NOTICE "%s: ioaddr %#lx, irq %d, " |
| 413 | "MAC: 00:ff:01:%02x:%02x:%02x\n", |
| 414 | dev->name, dev->base_addr, dev->irq, |
| 415 | ((u8 *) dev->dev_addr) [3], |
| 416 | ((u8 *) dev->dev_addr) [4], |
| 417 | ((u8 *) dev->dev_addr) [5] ); |
| 418 | |
| 419 | printk( KERN_NOTICE "%s: speed %d, receive level ", dev->name, |
| 420 | ( (nl->state & FL_SLOW_MODE) ? 500000 : 2000000) |
| 421 | / (1 << nl->csr1.rate) ); |
| 422 | |
| 423 | if( nl->delta_rxl == 0 ) |
| 424 | printk( "0x%x (fixed)\n", nl->cur_rxl_index ); |
| 425 | else |
| 426 | printk( "(auto)\n"); |
| 427 | |
| 428 | #ifdef CONFIG_SBNI_MULTILINE |
| 429 | nl->master = dev; |
| 430 | nl->link = NULL; |
| 431 | #endif |
| 432 | |
| 433 | sbni_cards[ num++ ] = dev; |
| 434 | return dev; |
| 435 | } |
| 436 | |
| 437 | /* -------------------------------------------------------------------------- */ |
| 438 | |
| 439 | #ifdef CONFIG_SBNI_MULTILINE |
| 440 | |
| 441 | static int |
| 442 | sbni_start_xmit( struct sk_buff *skb, struct net_device *dev ) |
| 443 | { |
| 444 | struct net_device *p; |
| 445 | |
| 446 | netif_stop_queue( dev ); |
| 447 | |
| 448 | /* Looking for idle device in the list */ |
| 449 | for( p = dev; p; ) { |
| 450 | struct net_local *nl = (struct net_local *) p->priv; |
| 451 | spin_lock( &nl->lock ); |
| 452 | if( nl->tx_buf_p || (nl->state & FL_LINE_DOWN) ) { |
| 453 | p = nl->link; |
| 454 | spin_unlock( &nl->lock ); |
| 455 | } else { |
| 456 | /* Idle dev is found */ |
| 457 | prepare_to_send( skb, p ); |
| 458 | spin_unlock( &nl->lock ); |
| 459 | netif_start_queue( dev ); |
| 460 | return 0; |
| 461 | } |
| 462 | } |
| 463 | |
| 464 | return 1; |
| 465 | } |
| 466 | |
| 467 | #else /* CONFIG_SBNI_MULTILINE */ |
| 468 | |
| 469 | static int |
| 470 | sbni_start_xmit( struct sk_buff *skb, struct net_device *dev ) |
| 471 | { |
| 472 | struct net_local *nl = (struct net_local *) dev->priv; |
| 473 | |
| 474 | netif_stop_queue( dev ); |
| 475 | spin_lock( &nl->lock ); |
| 476 | |
| 477 | prepare_to_send( skb, dev ); |
| 478 | |
| 479 | spin_unlock( &nl->lock ); |
| 480 | return 0; |
| 481 | } |
| 482 | |
| 483 | #endif /* CONFIG_SBNI_MULTILINE */ |
| 484 | |
| 485 | /* -------------------------------------------------------------------------- */ |
| 486 | |
| 487 | /* interrupt handler */ |
| 488 | |
| 489 | /* |
| 490 | * SBNI12D-10, -11/ISA boards within "common interrupt" mode could not |
| 491 | * be looked as two independent single-channel devices. Every channel seems |
| 492 | * as Ethernet interface but interrupt handler must be common. Really, first |
| 493 | * channel ("master") driver only registers the handler. In its struct net_local |
| 494 | * it has got pointer to "slave" channel's struct net_local and handles that's |
| 495 | * interrupts too. |
| 496 | * dev of successfully attached ISA SBNI boards is linked to list. |
| 497 | * While next board driver is initialized, it scans this list. If one |
| 498 | * has found dev with same irq and ioaddr different by 4 then it assumes |
| 499 | * this board to be "master". |
| 500 | */ |
| 501 | |
| 502 | static irqreturn_t |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 503 | sbni_interrupt( int irq, void *dev_id ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | { |
| 505 | struct net_device *dev = (struct net_device *) dev_id; |
| 506 | struct net_local *nl = (struct net_local *) dev->priv; |
| 507 | int repeat; |
| 508 | |
| 509 | spin_lock( &nl->lock ); |
| 510 | if( nl->second ) |
| 511 | spin_lock( &((struct net_local *) nl->second->priv)->lock ); |
| 512 | |
| 513 | do { |
| 514 | repeat = 0; |
| 515 | if( inb( dev->base_addr + CSR0 ) & (RC_RDY | TR_RDY) ) |
| 516 | handle_channel( dev ), |
| 517 | repeat = 1; |
| 518 | if( nl->second && /* second channel present */ |
| 519 | (inb( nl->second->base_addr+CSR0 ) & (RC_RDY | TR_RDY)) ) |
| 520 | handle_channel( nl->second ), |
| 521 | repeat = 1; |
| 522 | } while( repeat ); |
| 523 | |
| 524 | if( nl->second ) |
| 525 | spin_unlock( &((struct net_local *)nl->second->priv)->lock ); |
| 526 | spin_unlock( &nl->lock ); |
| 527 | return IRQ_HANDLED; |
| 528 | } |
| 529 | |
| 530 | |
| 531 | static void |
| 532 | handle_channel( struct net_device *dev ) |
| 533 | { |
| 534 | struct net_local *nl = (struct net_local *) dev->priv; |
| 535 | unsigned long ioaddr = dev->base_addr; |
| 536 | |
| 537 | int req_ans; |
| 538 | unsigned char csr0; |
| 539 | |
| 540 | #ifdef CONFIG_SBNI_MULTILINE |
| 541 | /* Lock the master device because we going to change its local data */ |
| 542 | if( nl->state & FL_SLAVE ) |
| 543 | spin_lock( &((struct net_local *) nl->master->priv)->lock ); |
| 544 | #endif |
| 545 | |
| 546 | outb( (inb( ioaddr + CSR0 ) & ~EN_INT) | TR_REQ, ioaddr + CSR0 ); |
| 547 | |
| 548 | nl->timer_ticks = CHANGE_LEVEL_START_TICKS; |
| 549 | for(;;) { |
| 550 | csr0 = inb( ioaddr + CSR0 ); |
| 551 | if( ( csr0 & (RC_RDY | TR_RDY) ) == 0 ) |
| 552 | break; |
| 553 | |
| 554 | req_ans = !(nl->state & FL_PREV_OK); |
| 555 | |
| 556 | if( csr0 & RC_RDY ) |
| 557 | req_ans = recv_frame( dev ); |
| 558 | |
| 559 | /* |
| 560 | * TR_RDY always equals 1 here because we have owned the marker, |
| 561 | * and we set TR_REQ when disabled interrupts |
| 562 | */ |
| 563 | csr0 = inb( ioaddr + CSR0 ); |
| 564 | if( !(csr0 & TR_RDY) || (csr0 & RC_RDY) ) |
| 565 | printk( KERN_ERR "%s: internal error!\n", dev->name ); |
| 566 | |
| 567 | /* if state & FL_NEED_RESEND != 0 then tx_frameno != 0 */ |
| 568 | if( req_ans || nl->tx_frameno != 0 ) |
| 569 | send_frame( dev ); |
| 570 | else |
| 571 | /* send marker without any data */ |
| 572 | outb( inb( ioaddr + CSR0 ) & ~TR_REQ, ioaddr + CSR0 ); |
| 573 | } |
| 574 | |
| 575 | outb( inb( ioaddr + CSR0 ) | EN_INT, ioaddr + CSR0 ); |
| 576 | |
| 577 | #ifdef CONFIG_SBNI_MULTILINE |
| 578 | if( nl->state & FL_SLAVE ) |
| 579 | spin_unlock( &((struct net_local *) nl->master->priv)->lock ); |
| 580 | #endif |
| 581 | } |
| 582 | |
| 583 | |
| 584 | /* |
| 585 | * Routine returns 1 if it need to acknoweledge received frame. |
| 586 | * Empty frame received without errors won't be acknoweledged. |
| 587 | */ |
| 588 | |
| 589 | static int |
| 590 | recv_frame( struct net_device *dev ) |
| 591 | { |
| 592 | struct net_local *nl = (struct net_local *) dev->priv; |
| 593 | unsigned long ioaddr = dev->base_addr; |
| 594 | |
| 595 | u32 crc = CRC32_INITIAL; |
| 596 | |
Jeff Garzik | e5fb4f4 | 2007-07-17 01:56:32 -0400 | [diff] [blame] | 597 | unsigned framelen = 0, frameno, ack; |
| 598 | unsigned is_first, frame_ok = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | |
| 600 | if( check_fhdr( ioaddr, &framelen, &frameno, &ack, &is_first, &crc ) ) { |
| 601 | frame_ok = framelen > 4 |
| 602 | ? upload_data( dev, framelen, frameno, is_first, crc ) |
| 603 | : skip_tail( ioaddr, framelen, crc ); |
| 604 | if( frame_ok ) |
| 605 | interpret_ack( dev, ack ); |
Jeff Garzik | e5fb4f4 | 2007-07-17 01:56:32 -0400 | [diff] [blame] | 606 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | |
| 608 | outb( inb( ioaddr + CSR0 ) ^ CT_ZER, ioaddr + CSR0 ); |
| 609 | if( frame_ok ) { |
| 610 | nl->state |= FL_PREV_OK; |
| 611 | if( framelen > 4 ) |
| 612 | nl->in_stats.all_rx_number++; |
| 613 | } else |
| 614 | nl->state &= ~FL_PREV_OK, |
| 615 | change_level( dev ), |
| 616 | nl->in_stats.all_rx_number++, |
| 617 | nl->in_stats.bad_rx_number++; |
| 618 | |
| 619 | return !frame_ok || framelen > 4; |
| 620 | } |
| 621 | |
| 622 | |
| 623 | static void |
| 624 | send_frame( struct net_device *dev ) |
| 625 | { |
| 626 | struct net_local *nl = (struct net_local *) dev->priv; |
| 627 | |
| 628 | u32 crc = CRC32_INITIAL; |
| 629 | |
| 630 | if( nl->state & FL_NEED_RESEND ) { |
| 631 | |
| 632 | /* if frame was sended but not ACK'ed - resend it */ |
| 633 | if( nl->trans_errors ) { |
| 634 | --nl->trans_errors; |
| 635 | if( nl->framelen != 0 ) |
| 636 | nl->in_stats.resend_tx_number++; |
| 637 | } else { |
| 638 | /* cannot xmit with many attempts */ |
| 639 | #ifdef CONFIG_SBNI_MULTILINE |
| 640 | if( (nl->state & FL_SLAVE) || nl->link ) |
| 641 | #endif |
| 642 | nl->state |= FL_LINE_DOWN; |
| 643 | drop_xmit_queue( dev ); |
| 644 | goto do_send; |
| 645 | } |
| 646 | } else |
| 647 | nl->trans_errors = TR_ERROR_COUNT; |
| 648 | |
| 649 | send_frame_header( dev, &crc ); |
| 650 | nl->state |= FL_NEED_RESEND; |
| 651 | /* |
| 652 | * FL_NEED_RESEND will be cleared after ACK, but if empty |
| 653 | * frame sended then in prepare_to_send next frame |
| 654 | */ |
| 655 | |
| 656 | |
| 657 | if( nl->framelen ) { |
| 658 | download_data( dev, &crc ); |
| 659 | nl->in_stats.all_tx_number++; |
| 660 | nl->state |= FL_WAIT_ACK; |
| 661 | } |
| 662 | |
| 663 | outsb( dev->base_addr + DAT, (u8 *)&crc, sizeof crc ); |
| 664 | |
| 665 | do_send: |
| 666 | outb( inb( dev->base_addr + CSR0 ) & ~TR_REQ, dev->base_addr + CSR0 ); |
| 667 | |
| 668 | if( nl->tx_frameno ) |
| 669 | /* next frame exists - we request card to send it */ |
| 670 | outb( inb( dev->base_addr + CSR0 ) | TR_REQ, |
| 671 | dev->base_addr + CSR0 ); |
| 672 | } |
| 673 | |
| 674 | |
| 675 | /* |
| 676 | * Write the frame data into adapter's buffer memory, and calculate CRC. |
| 677 | * Do padding if necessary. |
| 678 | */ |
| 679 | |
| 680 | static void |
| 681 | download_data( struct net_device *dev, u32 *crc_p ) |
| 682 | { |
| 683 | struct net_local *nl = (struct net_local *) dev->priv; |
| 684 | struct sk_buff *skb = nl->tx_buf_p; |
| 685 | |
| 686 | unsigned len = min_t(unsigned int, skb->len - nl->outpos, nl->framelen); |
| 687 | |
| 688 | outsb( dev->base_addr + DAT, skb->data + nl->outpos, len ); |
| 689 | *crc_p = calc_crc32( *crc_p, skb->data + nl->outpos, len ); |
| 690 | |
| 691 | /* if packet too short we should write some more bytes to pad */ |
| 692 | for( len = nl->framelen - len; len--; ) |
| 693 | outb( 0, dev->base_addr + DAT ), |
| 694 | *crc_p = CRC32( 0, *crc_p ); |
| 695 | } |
| 696 | |
| 697 | |
| 698 | static int |
| 699 | upload_data( struct net_device *dev, unsigned framelen, unsigned frameno, |
| 700 | unsigned is_first, u32 crc ) |
| 701 | { |
| 702 | struct net_local *nl = (struct net_local *) dev->priv; |
| 703 | |
| 704 | int frame_ok; |
| 705 | |
| 706 | if( is_first ) |
| 707 | nl->wait_frameno = frameno, |
| 708 | nl->inppos = 0; |
| 709 | |
| 710 | if( nl->wait_frameno == frameno ) { |
| 711 | |
| 712 | if( nl->inppos + framelen <= ETHER_MAX_LEN ) |
| 713 | frame_ok = append_frame_to_pkt( dev, framelen, crc ); |
| 714 | |
| 715 | /* |
| 716 | * if CRC is right but framelen incorrect then transmitter |
| 717 | * error was occurred... drop entire packet |
| 718 | */ |
| 719 | else if( (frame_ok = skip_tail( dev->base_addr, framelen, crc )) |
| 720 | != 0 ) |
| 721 | nl->wait_frameno = 0, |
| 722 | nl->inppos = 0, |
| 723 | #ifdef CONFIG_SBNI_MULTILINE |
| 724 | ((struct net_local *) nl->master->priv) |
| 725 | ->stats.rx_errors++, |
| 726 | ((struct net_local *) nl->master->priv) |
| 727 | ->stats.rx_missed_errors++; |
| 728 | #else |
| 729 | nl->stats.rx_errors++, |
| 730 | nl->stats.rx_missed_errors++; |
| 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 |
| 743 | ((struct net_local *) nl->master->priv)->stats.rx_errors++, |
| 744 | ((struct net_local *) nl->master->priv)->stats.rx_crc_errors++; |
| 745 | #else |
| 746 | nl->stats.rx_errors++, |
| 747 | nl->stats.rx_crc_errors++; |
| 748 | #endif |
| 749 | |
| 750 | return frame_ok; |
| 751 | } |
| 752 | |
| 753 | |
| 754 | static __inline void |
| 755 | send_complete( struct net_local *nl ) |
| 756 | { |
| 757 | #ifdef CONFIG_SBNI_MULTILINE |
| 758 | ((struct net_local *) nl->master->priv)->stats.tx_packets++; |
| 759 | ((struct net_local *) nl->master->priv)->stats.tx_bytes |
| 760 | += nl->tx_buf_p->len; |
| 761 | #else |
| 762 | nl->stats.tx_packets++; |
| 763 | nl->stats.tx_bytes += nl->tx_buf_p->len; |
| 764 | #endif |
| 765 | dev_kfree_skb_irq( nl->tx_buf_p ); |
| 766 | |
| 767 | nl->tx_buf_p = NULL; |
| 768 | |
| 769 | nl->outpos = 0; |
| 770 | nl->state &= ~(FL_WAIT_ACK | FL_NEED_RESEND); |
| 771 | nl->framelen = 0; |
| 772 | } |
| 773 | |
| 774 | |
| 775 | static void |
| 776 | interpret_ack( struct net_device *dev, unsigned ack ) |
| 777 | { |
| 778 | struct net_local *nl = (struct net_local *) dev->priv; |
| 779 | |
| 780 | if( ack == FRAME_SENT_OK ) { |
| 781 | nl->state &= ~FL_NEED_RESEND; |
| 782 | |
| 783 | if( nl->state & FL_WAIT_ACK ) { |
| 784 | nl->outpos += nl->framelen; |
| 785 | |
| 786 | if( --nl->tx_frameno ) |
| 787 | nl->framelen = min_t(unsigned int, |
| 788 | nl->maxframe, |
| 789 | nl->tx_buf_p->len - nl->outpos); |
| 790 | else |
| 791 | send_complete( nl ), |
| 792 | #ifdef CONFIG_SBNI_MULTILINE |
| 793 | netif_wake_queue( nl->master ); |
| 794 | #else |
| 795 | netif_wake_queue( dev ); |
| 796 | #endif |
| 797 | } |
| 798 | } |
| 799 | |
| 800 | nl->state &= ~FL_WAIT_ACK; |
| 801 | } |
| 802 | |
| 803 | |
| 804 | /* |
| 805 | * Glue received frame with previous fragments of packet. |
| 806 | * Indicate packet when last frame would be accepted. |
| 807 | */ |
| 808 | |
| 809 | static int |
| 810 | append_frame_to_pkt( struct net_device *dev, unsigned framelen, u32 crc ) |
| 811 | { |
| 812 | struct net_local *nl = (struct net_local *) dev->priv; |
| 813 | |
| 814 | u8 *p; |
| 815 | |
| 816 | if( nl->inppos + framelen > ETHER_MAX_LEN ) |
| 817 | return 0; |
| 818 | |
| 819 | if( !nl->rx_buf_p && !(nl->rx_buf_p = get_rx_buf( dev )) ) |
| 820 | return 0; |
| 821 | |
| 822 | p = nl->rx_buf_p->data + nl->inppos; |
| 823 | insb( dev->base_addr + DAT, p, framelen ); |
| 824 | if( calc_crc32( crc, p, framelen ) != CRC32_REMAINDER ) |
| 825 | return 0; |
| 826 | |
| 827 | nl->inppos += framelen - 4; |
| 828 | if( --nl->wait_frameno == 0 ) /* last frame received */ |
| 829 | indicate_pkt( dev ); |
| 830 | |
| 831 | return 1; |
| 832 | } |
| 833 | |
| 834 | |
| 835 | /* |
| 836 | * Prepare to start output on adapter. |
| 837 | * Transmitter will be actually activated when marker is accepted. |
| 838 | */ |
| 839 | |
| 840 | static void |
| 841 | prepare_to_send( struct sk_buff *skb, struct net_device *dev ) |
| 842 | { |
| 843 | struct net_local *nl = (struct net_local *) dev->priv; |
| 844 | |
| 845 | unsigned int len; |
| 846 | |
| 847 | /* nl->tx_buf_p == NULL here! */ |
| 848 | if( nl->tx_buf_p ) |
| 849 | printk( KERN_ERR "%s: memory leak!\n", dev->name ); |
| 850 | |
| 851 | nl->outpos = 0; |
| 852 | nl->state &= ~(FL_WAIT_ACK | FL_NEED_RESEND); |
| 853 | |
| 854 | len = skb->len; |
| 855 | if( len < SBNI_MIN_LEN ) |
| 856 | len = SBNI_MIN_LEN; |
| 857 | |
| 858 | nl->tx_buf_p = skb; |
| 859 | nl->tx_frameno = (len + nl->maxframe - 1) / nl->maxframe; |
| 860 | nl->framelen = len < nl->maxframe ? len : nl->maxframe; |
| 861 | |
| 862 | outb( inb( dev->base_addr + CSR0 ) | TR_REQ, dev->base_addr + CSR0 ); |
| 863 | #ifdef CONFIG_SBNI_MULTILINE |
| 864 | nl->master->trans_start = jiffies; |
| 865 | #else |
| 866 | dev->trans_start = jiffies; |
| 867 | #endif |
| 868 | } |
| 869 | |
| 870 | |
| 871 | static void |
| 872 | drop_xmit_queue( struct net_device *dev ) |
| 873 | { |
| 874 | struct net_local *nl = (struct net_local *) dev->priv; |
| 875 | |
| 876 | if( nl->tx_buf_p ) |
| 877 | dev_kfree_skb_any( nl->tx_buf_p ), |
| 878 | nl->tx_buf_p = NULL, |
| 879 | #ifdef CONFIG_SBNI_MULTILINE |
| 880 | ((struct net_local *) nl->master->priv) |
| 881 | ->stats.tx_errors++, |
| 882 | ((struct net_local *) nl->master->priv) |
| 883 | ->stats.tx_carrier_errors++; |
| 884 | #else |
| 885 | nl->stats.tx_errors++, |
| 886 | nl->stats.tx_carrier_errors++; |
| 887 | #endif |
| 888 | |
| 889 | nl->tx_frameno = 0; |
| 890 | nl->framelen = 0; |
| 891 | nl->outpos = 0; |
| 892 | nl->state &= ~(FL_WAIT_ACK | FL_NEED_RESEND); |
| 893 | #ifdef CONFIG_SBNI_MULTILINE |
| 894 | netif_start_queue( nl->master ); |
| 895 | nl->master->trans_start = jiffies; |
| 896 | #else |
| 897 | netif_start_queue( dev ); |
| 898 | dev->trans_start = jiffies; |
| 899 | #endif |
| 900 | } |
| 901 | |
| 902 | |
| 903 | static void |
| 904 | send_frame_header( struct net_device *dev, u32 *crc_p ) |
| 905 | { |
| 906 | struct net_local *nl = (struct net_local *) dev->priv; |
| 907 | |
| 908 | u32 crc = *crc_p; |
| 909 | u32 len_field = nl->framelen + 6; /* CRC + frameno + reserved */ |
| 910 | u8 value; |
| 911 | |
| 912 | if( nl->state & FL_NEED_RESEND ) |
| 913 | len_field |= FRAME_RETRY; /* non-first attempt... */ |
| 914 | |
| 915 | if( nl->outpos == 0 ) |
| 916 | len_field |= FRAME_FIRST; |
| 917 | |
| 918 | len_field |= (nl->state & FL_PREV_OK) ? FRAME_SENT_OK : FRAME_SENT_BAD; |
| 919 | outb( SBNI_SIG, dev->base_addr + DAT ); |
| 920 | |
| 921 | value = (u8) len_field; |
| 922 | outb( value, dev->base_addr + DAT ); |
| 923 | crc = CRC32( value, crc ); |
| 924 | value = (u8) (len_field >> 8); |
| 925 | outb( value, dev->base_addr + DAT ); |
| 926 | crc = CRC32( value, crc ); |
| 927 | |
| 928 | outb( nl->tx_frameno, dev->base_addr + DAT ); |
| 929 | crc = CRC32( nl->tx_frameno, crc ); |
| 930 | outb( 0, dev->base_addr + DAT ); |
| 931 | crc = CRC32( 0, crc ); |
| 932 | *crc_p = crc; |
| 933 | } |
| 934 | |
| 935 | |
| 936 | /* |
| 937 | * if frame tail not needed (incorrect number or received twice), |
| 938 | * it won't store, but CRC will be calculated |
| 939 | */ |
| 940 | |
| 941 | static int |
| 942 | skip_tail( unsigned int ioaddr, unsigned int tail_len, u32 crc ) |
| 943 | { |
| 944 | while( tail_len-- ) |
| 945 | crc = CRC32( inb( ioaddr + DAT ), crc ); |
| 946 | |
| 947 | return crc == CRC32_REMAINDER; |
| 948 | } |
| 949 | |
| 950 | |
| 951 | /* |
| 952 | * Preliminary checks if frame header is correct, calculates its CRC |
| 953 | * and split it to simple fields |
| 954 | */ |
| 955 | |
| 956 | static int |
| 957 | check_fhdr( u32 ioaddr, u32 *framelen, u32 *frameno, u32 *ack, |
| 958 | u32 *is_first, u32 *crc_p ) |
| 959 | { |
| 960 | u32 crc = *crc_p; |
| 961 | u8 value; |
| 962 | |
| 963 | if( inb( ioaddr + DAT ) != SBNI_SIG ) |
| 964 | return 0; |
| 965 | |
| 966 | value = inb( ioaddr + DAT ); |
| 967 | *framelen = (u32)value; |
| 968 | crc = CRC32( value, crc ); |
| 969 | value = inb( ioaddr + DAT ); |
| 970 | *framelen |= ((u32)value) << 8; |
| 971 | crc = CRC32( value, crc ); |
| 972 | |
| 973 | *ack = *framelen & FRAME_ACK_MASK; |
| 974 | *is_first = (*framelen & FRAME_FIRST) != 0; |
| 975 | |
| 976 | if( (*framelen &= FRAME_LEN_MASK) < 6 |
| 977 | || *framelen > SBNI_MAX_FRAME - 3 ) |
| 978 | return 0; |
| 979 | |
| 980 | value = inb( ioaddr + DAT ); |
| 981 | *frameno = (u32)value; |
| 982 | crc = CRC32( value, crc ); |
| 983 | |
| 984 | crc = CRC32( inb( ioaddr + DAT ), crc ); /* reserved byte */ |
| 985 | *framelen -= 2; |
| 986 | |
| 987 | *crc_p = crc; |
| 988 | return 1; |
| 989 | } |
| 990 | |
| 991 | |
| 992 | static struct sk_buff * |
| 993 | get_rx_buf( struct net_device *dev ) |
| 994 | { |
| 995 | /* +2 is to compensate for the alignment fixup below */ |
| 996 | struct sk_buff *skb = dev_alloc_skb( ETHER_MAX_LEN + 2 ); |
| 997 | if( !skb ) |
| 998 | return NULL; |
| 999 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | skb_reserve( skb, 2 ); /* Align IP on longword boundaries */ |
| 1001 | return skb; |
| 1002 | } |
| 1003 | |
| 1004 | |
| 1005 | static void |
| 1006 | indicate_pkt( struct net_device *dev ) |
| 1007 | { |
| 1008 | struct net_local *nl = (struct net_local *) dev->priv; |
| 1009 | struct sk_buff *skb = nl->rx_buf_p; |
| 1010 | |
| 1011 | skb_put( skb, nl->inppos ); |
| 1012 | |
| 1013 | #ifdef CONFIG_SBNI_MULTILINE |
| 1014 | skb->protocol = eth_type_trans( skb, nl->master ); |
| 1015 | netif_rx( skb ); |
| 1016 | dev->last_rx = jiffies; |
| 1017 | ++((struct net_local *) nl->master->priv)->stats.rx_packets; |
| 1018 | ((struct net_local *) nl->master->priv)->stats.rx_bytes += nl->inppos; |
| 1019 | #else |
| 1020 | skb->protocol = eth_type_trans( skb, dev ); |
| 1021 | netif_rx( skb ); |
| 1022 | dev->last_rx = jiffies; |
| 1023 | ++nl->stats.rx_packets; |
| 1024 | nl->stats.rx_bytes += nl->inppos; |
| 1025 | #endif |
| 1026 | nl->rx_buf_p = NULL; /* protocol driver will clear this sk_buff */ |
| 1027 | } |
| 1028 | |
| 1029 | |
| 1030 | /* -------------------------------------------------------------------------- */ |
| 1031 | |
| 1032 | /* |
| 1033 | * Routine checks periodically wire activity and regenerates marker if |
| 1034 | * connect was inactive for a long time. |
| 1035 | */ |
| 1036 | |
| 1037 | static void |
| 1038 | sbni_watchdog( unsigned long arg ) |
| 1039 | { |
| 1040 | struct net_device *dev = (struct net_device *) arg; |
| 1041 | struct net_local *nl = (struct net_local *) dev->priv; |
| 1042 | struct timer_list *w = &nl->watchdog; |
| 1043 | unsigned long flags; |
| 1044 | unsigned char csr0; |
| 1045 | |
| 1046 | spin_lock_irqsave( &nl->lock, flags ); |
| 1047 | |
| 1048 | csr0 = inb( dev->base_addr + CSR0 ); |
| 1049 | if( csr0 & RC_CHK ) { |
| 1050 | |
| 1051 | if( nl->timer_ticks ) { |
| 1052 | if( csr0 & (RC_RDY | BU_EMP) ) |
| 1053 | /* receiving not active */ |
| 1054 | nl->timer_ticks--; |
| 1055 | } else { |
| 1056 | nl->in_stats.timeout_number++; |
| 1057 | if( nl->delta_rxl ) |
| 1058 | timeout_change_level( dev ); |
| 1059 | |
| 1060 | outb( *(u_char *)&nl->csr1 | PR_RES, |
| 1061 | dev->base_addr + CSR1 ); |
| 1062 | csr0 = inb( dev->base_addr + CSR0 ); |
| 1063 | } |
| 1064 | } else |
| 1065 | nl->state &= ~FL_LINE_DOWN; |
| 1066 | |
| 1067 | outb( csr0 | RC_CHK, dev->base_addr + CSR0 ); |
| 1068 | |
| 1069 | init_timer( w ); |
| 1070 | w->expires = jiffies + SBNI_TIMEOUT; |
| 1071 | w->data = arg; |
| 1072 | w->function = sbni_watchdog; |
| 1073 | add_timer( w ); |
| 1074 | |
| 1075 | spin_unlock_irqrestore( &nl->lock, flags ); |
| 1076 | } |
| 1077 | |
| 1078 | |
| 1079 | static unsigned char rxl_tab[] = { |
| 1080 | 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x08, |
| 1081 | 0x0a, 0x0c, 0x0f, 0x16, 0x18, 0x1a, 0x1c, 0x1f |
| 1082 | }; |
| 1083 | |
| 1084 | #define SIZE_OF_TIMEOUT_RXL_TAB 4 |
| 1085 | static unsigned char timeout_rxl_tab[] = { |
| 1086 | 0x03, 0x05, 0x08, 0x0b |
| 1087 | }; |
| 1088 | |
| 1089 | /* -------------------------------------------------------------------------- */ |
| 1090 | |
| 1091 | static void |
| 1092 | card_start( struct net_device *dev ) |
| 1093 | { |
| 1094 | struct net_local *nl = (struct net_local *) dev->priv; |
| 1095 | |
| 1096 | nl->timer_ticks = CHANGE_LEVEL_START_TICKS; |
| 1097 | nl->state &= ~(FL_WAIT_ACK | FL_NEED_RESEND); |
| 1098 | nl->state |= FL_PREV_OK; |
| 1099 | |
| 1100 | nl->inppos = nl->outpos = 0; |
| 1101 | nl->wait_frameno = 0; |
| 1102 | nl->tx_frameno = 0; |
| 1103 | nl->framelen = 0; |
| 1104 | |
| 1105 | outb( *(u_char *)&nl->csr1 | PR_RES, dev->base_addr + CSR1 ); |
| 1106 | outb( EN_INT, dev->base_addr + CSR0 ); |
| 1107 | } |
| 1108 | |
| 1109 | /* -------------------------------------------------------------------------- */ |
| 1110 | |
| 1111 | /* Receive level auto-selection */ |
| 1112 | |
| 1113 | static void |
| 1114 | change_level( struct net_device *dev ) |
| 1115 | { |
| 1116 | struct net_local *nl = (struct net_local *) dev->priv; |
| 1117 | |
| 1118 | if( nl->delta_rxl == 0 ) /* do not auto-negotiate RxL */ |
| 1119 | return; |
| 1120 | |
| 1121 | if( nl->cur_rxl_index == 0 ) |
| 1122 | nl->delta_rxl = 1; |
| 1123 | else if( nl->cur_rxl_index == 15 ) |
| 1124 | nl->delta_rxl = -1; |
| 1125 | else if( nl->cur_rxl_rcvd < nl->prev_rxl_rcvd ) |
| 1126 | nl->delta_rxl = -nl->delta_rxl; |
| 1127 | |
| 1128 | nl->csr1.rxl = rxl_tab[ nl->cur_rxl_index += nl->delta_rxl ]; |
| 1129 | inb( dev->base_addr + CSR0 ); /* needs for PCI cards */ |
| 1130 | outb( *(u8 *)&nl->csr1, dev->base_addr + CSR1 ); |
| 1131 | |
| 1132 | nl->prev_rxl_rcvd = nl->cur_rxl_rcvd; |
| 1133 | nl->cur_rxl_rcvd = 0; |
| 1134 | } |
| 1135 | |
| 1136 | |
| 1137 | static void |
| 1138 | timeout_change_level( struct net_device *dev ) |
| 1139 | { |
| 1140 | struct net_local *nl = (struct net_local *) dev->priv; |
| 1141 | |
| 1142 | nl->cur_rxl_index = timeout_rxl_tab[ nl->timeout_rxl ]; |
| 1143 | if( ++nl->timeout_rxl >= 4 ) |
| 1144 | nl->timeout_rxl = 0; |
| 1145 | |
| 1146 | nl->csr1.rxl = rxl_tab[ nl->cur_rxl_index ]; |
| 1147 | inb( dev->base_addr + CSR0 ); |
| 1148 | outb( *(unsigned char *)&nl->csr1, dev->base_addr + CSR1 ); |
| 1149 | |
| 1150 | nl->prev_rxl_rcvd = nl->cur_rxl_rcvd; |
| 1151 | nl->cur_rxl_rcvd = 0; |
| 1152 | } |
| 1153 | |
| 1154 | /* -------------------------------------------------------------------------- */ |
| 1155 | |
| 1156 | /* |
| 1157 | * Open/initialize the board. |
| 1158 | */ |
| 1159 | |
| 1160 | static int |
| 1161 | sbni_open( struct net_device *dev ) |
| 1162 | { |
| 1163 | struct net_local *nl = (struct net_local *) dev->priv; |
| 1164 | struct timer_list *w = &nl->watchdog; |
| 1165 | |
| 1166 | /* |
| 1167 | * For double ISA adapters within "common irq" mode, we have to |
| 1168 | * determine whether primary or secondary channel is initialized, |
| 1169 | * and set the irq handler only in first case. |
| 1170 | */ |
| 1171 | if( dev->base_addr < 0x400 ) { /* ISA only */ |
| 1172 | struct net_device **p = sbni_cards; |
| 1173 | for( ; *p && p < sbni_cards + SBNI_MAX_NUM_CARDS; ++p ) |
| 1174 | if( (*p)->irq == dev->irq |
| 1175 | && ((*p)->base_addr == dev->base_addr + 4 |
| 1176 | || (*p)->base_addr == dev->base_addr - 4) |
| 1177 | && (*p)->flags & IFF_UP ) { |
| 1178 | |
| 1179 | ((struct net_local *) ((*p)->priv)) |
| 1180 | ->second = dev; |
| 1181 | printk( KERN_NOTICE "%s: using shared irq " |
| 1182 | "with %s\n", dev->name, (*p)->name ); |
| 1183 | nl->state |= FL_SECONDARY; |
| 1184 | goto handler_attached; |
| 1185 | } |
| 1186 | } |
| 1187 | |
Thomas Gleixner | 1fb9df5 | 2006-07-01 19:29:39 -0700 | [diff] [blame] | 1188 | if( request_irq(dev->irq, sbni_interrupt, IRQF_SHARED, dev->name, dev) ) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1189 | printk( KERN_ERR "%s: unable to get IRQ %d.\n", |
| 1190 | dev->name, dev->irq ); |
| 1191 | return -EAGAIN; |
| 1192 | } |
| 1193 | |
| 1194 | handler_attached: |
| 1195 | |
| 1196 | spin_lock( &nl->lock ); |
| 1197 | memset( &nl->stats, 0, sizeof(struct net_device_stats) ); |
| 1198 | memset( &nl->in_stats, 0, sizeof(struct sbni_in_stats) ); |
| 1199 | |
| 1200 | card_start( dev ); |
| 1201 | |
| 1202 | netif_start_queue( dev ); |
| 1203 | |
| 1204 | /* set timer watchdog */ |
| 1205 | init_timer( w ); |
| 1206 | w->expires = jiffies + SBNI_TIMEOUT; |
| 1207 | w->data = (unsigned long) dev; |
| 1208 | w->function = sbni_watchdog; |
| 1209 | add_timer( w ); |
| 1210 | |
| 1211 | spin_unlock( &nl->lock ); |
| 1212 | return 0; |
| 1213 | } |
| 1214 | |
| 1215 | |
| 1216 | static int |
| 1217 | sbni_close( struct net_device *dev ) |
| 1218 | { |
| 1219 | struct net_local *nl = (struct net_local *) dev->priv; |
| 1220 | |
| 1221 | if( nl->second && nl->second->flags & IFF_UP ) { |
| 1222 | printk( KERN_NOTICE "Secondary channel (%s) is active!\n", |
| 1223 | nl->second->name ); |
| 1224 | return -EBUSY; |
| 1225 | } |
| 1226 | |
| 1227 | #ifdef CONFIG_SBNI_MULTILINE |
| 1228 | if( nl->state & FL_SLAVE ) |
| 1229 | emancipate( dev ); |
| 1230 | else |
| 1231 | while( nl->link ) /* it's master device! */ |
| 1232 | emancipate( nl->link ); |
| 1233 | #endif |
| 1234 | |
| 1235 | spin_lock( &nl->lock ); |
| 1236 | |
| 1237 | nl->second = NULL; |
| 1238 | drop_xmit_queue( dev ); |
| 1239 | netif_stop_queue( dev ); |
| 1240 | |
| 1241 | del_timer( &nl->watchdog ); |
| 1242 | |
| 1243 | outb( 0, dev->base_addr + CSR0 ); |
| 1244 | |
| 1245 | if( !(nl->state & FL_SECONDARY) ) |
| 1246 | free_irq( dev->irq, dev ); |
| 1247 | nl->state &= FL_SECONDARY; |
| 1248 | |
| 1249 | spin_unlock( &nl->lock ); |
| 1250 | return 0; |
| 1251 | } |
| 1252 | |
| 1253 | |
| 1254 | /* |
| 1255 | Valid combinations in CSR0 (for probing): |
| 1256 | |
| 1257 | VALID_DECODER 0000,0011,1011,1010 |
| 1258 | |
| 1259 | ; 0 ; - |
| 1260 | TR_REQ ; 1 ; + |
| 1261 | TR_RDY ; 2 ; - |
| 1262 | TR_RDY TR_REQ ; 3 ; + |
| 1263 | BU_EMP ; 4 ; + |
| 1264 | BU_EMP TR_REQ ; 5 ; + |
| 1265 | BU_EMP TR_RDY ; 6 ; - |
| 1266 | BU_EMP TR_RDY TR_REQ ; 7 ; + |
| 1267 | RC_RDY ; 8 ; + |
| 1268 | RC_RDY TR_REQ ; 9 ; + |
| 1269 | RC_RDY TR_RDY ; 10 ; - |
| 1270 | RC_RDY TR_RDY TR_REQ ; 11 ; - |
| 1271 | RC_RDY BU_EMP ; 12 ; - |
| 1272 | RC_RDY BU_EMP TR_REQ ; 13 ; - |
| 1273 | RC_RDY BU_EMP TR_RDY ; 14 ; - |
| 1274 | RC_RDY BU_EMP TR_RDY TR_REQ ; 15 ; - |
| 1275 | */ |
| 1276 | |
| 1277 | #define VALID_DECODER (2 + 8 + 0x10 + 0x20 + 0x80 + 0x100 + 0x200) |
| 1278 | |
| 1279 | |
| 1280 | static int |
| 1281 | sbni_card_probe( unsigned long ioaddr ) |
| 1282 | { |
| 1283 | unsigned char csr0; |
| 1284 | |
| 1285 | csr0 = inb( ioaddr + CSR0 ); |
| 1286 | if( csr0 != 0xff && csr0 != 0x00 ) { |
| 1287 | csr0 &= ~EN_INT; |
| 1288 | if( csr0 & BU_EMP ) |
| 1289 | csr0 |= EN_INT; |
| 1290 | |
| 1291 | if( VALID_DECODER & (1 << (csr0 >> 4)) ) |
| 1292 | return 0; |
| 1293 | } |
| 1294 | |
| 1295 | return -ENODEV; |
| 1296 | } |
| 1297 | |
| 1298 | /* -------------------------------------------------------------------------- */ |
| 1299 | |
| 1300 | static int |
| 1301 | sbni_ioctl( struct net_device *dev, struct ifreq *ifr, int cmd ) |
| 1302 | { |
| 1303 | struct net_local *nl = (struct net_local *) dev->priv; |
| 1304 | struct sbni_flags flags; |
| 1305 | int error = 0; |
| 1306 | |
| 1307 | #ifdef CONFIG_SBNI_MULTILINE |
| 1308 | struct net_device *slave_dev; |
| 1309 | char slave_name[ 8 ]; |
| 1310 | #endif |
| 1311 | |
| 1312 | switch( cmd ) { |
| 1313 | case SIOCDEVGETINSTATS : |
| 1314 | if (copy_to_user( ifr->ifr_data, &nl->in_stats, |
| 1315 | sizeof(struct sbni_in_stats) )) |
| 1316 | error = -EFAULT; |
| 1317 | break; |
| 1318 | |
| 1319 | case SIOCDEVRESINSTATS : |
| 1320 | if( current->euid != 0 ) /* root only */ |
| 1321 | return -EPERM; |
| 1322 | memset( &nl->in_stats, 0, sizeof(struct sbni_in_stats) ); |
| 1323 | break; |
| 1324 | |
| 1325 | case SIOCDEVGHWSTATE : |
| 1326 | flags.mac_addr = *(u32 *)(dev->dev_addr + 3); |
| 1327 | flags.rate = nl->csr1.rate; |
| 1328 | flags.slow_mode = (nl->state & FL_SLOW_MODE) != 0; |
| 1329 | flags.rxl = nl->cur_rxl_index; |
| 1330 | flags.fixed_rxl = nl->delta_rxl == 0; |
| 1331 | |
| 1332 | if (copy_to_user( ifr->ifr_data, &flags, sizeof flags )) |
| 1333 | error = -EFAULT; |
| 1334 | break; |
| 1335 | |
| 1336 | case SIOCDEVSHWSTATE : |
| 1337 | if( current->euid != 0 ) /* root only */ |
| 1338 | return -EPERM; |
| 1339 | |
| 1340 | spin_lock( &nl->lock ); |
| 1341 | flags = *(struct sbni_flags*) &ifr->ifr_ifru; |
| 1342 | if( flags.fixed_rxl ) |
| 1343 | nl->delta_rxl = 0, |
| 1344 | nl->cur_rxl_index = flags.rxl; |
| 1345 | else |
| 1346 | nl->delta_rxl = DEF_RXL_DELTA, |
| 1347 | nl->cur_rxl_index = DEF_RXL; |
| 1348 | |
| 1349 | nl->csr1.rxl = rxl_tab[ nl->cur_rxl_index ]; |
| 1350 | nl->csr1.rate = flags.rate; |
| 1351 | outb( *(u8 *)&nl->csr1 | PR_RES, dev->base_addr + CSR1 ); |
| 1352 | spin_unlock( &nl->lock ); |
| 1353 | break; |
| 1354 | |
| 1355 | #ifdef CONFIG_SBNI_MULTILINE |
| 1356 | |
| 1357 | case SIOCDEVENSLAVE : |
| 1358 | if( current->euid != 0 ) /* root only */ |
| 1359 | return -EPERM; |
| 1360 | |
| 1361 | if (copy_from_user( slave_name, ifr->ifr_data, sizeof slave_name )) |
| 1362 | return -EFAULT; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1363 | slave_dev = dev_get_by_name(&init_net, slave_name ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1364 | if( !slave_dev || !(slave_dev->flags & IFF_UP) ) { |
| 1365 | printk( KERN_ERR "%s: trying to enslave non-active " |
| 1366 | "device %s\n", dev->name, slave_name ); |
| 1367 | return -EPERM; |
| 1368 | } |
| 1369 | |
| 1370 | return enslave( dev, slave_dev ); |
| 1371 | |
| 1372 | case SIOCDEVEMANSIPATE : |
| 1373 | if( current->euid != 0 ) /* root only */ |
| 1374 | return -EPERM; |
| 1375 | |
| 1376 | return emancipate( dev ); |
| 1377 | |
| 1378 | #endif /* CONFIG_SBNI_MULTILINE */ |
| 1379 | |
| 1380 | default : |
| 1381 | return -EOPNOTSUPP; |
| 1382 | } |
| 1383 | |
| 1384 | return error; |
| 1385 | } |
| 1386 | |
| 1387 | |
| 1388 | #ifdef CONFIG_SBNI_MULTILINE |
| 1389 | |
| 1390 | static int |
| 1391 | enslave( struct net_device *dev, struct net_device *slave_dev ) |
| 1392 | { |
| 1393 | struct net_local *nl = (struct net_local *) dev->priv; |
| 1394 | struct net_local *snl = (struct net_local *) slave_dev->priv; |
| 1395 | |
| 1396 | if( nl->state & FL_SLAVE ) /* This isn't master or free device */ |
| 1397 | return -EBUSY; |
| 1398 | |
| 1399 | if( snl->state & FL_SLAVE ) /* That was already enslaved */ |
| 1400 | return -EBUSY; |
| 1401 | |
| 1402 | spin_lock( &nl->lock ); |
| 1403 | spin_lock( &snl->lock ); |
| 1404 | |
| 1405 | /* append to list */ |
| 1406 | snl->link = nl->link; |
| 1407 | nl->link = slave_dev; |
| 1408 | snl->master = dev; |
| 1409 | snl->state |= FL_SLAVE; |
| 1410 | |
| 1411 | /* Summary statistics of MultiLine operation will be stored |
| 1412 | in master's counters */ |
| 1413 | memset( &snl->stats, 0, sizeof(struct net_device_stats) ); |
| 1414 | netif_stop_queue( slave_dev ); |
| 1415 | netif_wake_queue( dev ); /* Now we are able to transmit */ |
| 1416 | |
| 1417 | spin_unlock( &snl->lock ); |
| 1418 | spin_unlock( &nl->lock ); |
| 1419 | printk( KERN_NOTICE "%s: slave device (%s) attached.\n", |
| 1420 | dev->name, slave_dev->name ); |
| 1421 | return 0; |
| 1422 | } |
| 1423 | |
| 1424 | |
| 1425 | static int |
| 1426 | emancipate( struct net_device *dev ) |
| 1427 | { |
| 1428 | struct net_local *snl = (struct net_local *) dev->priv; |
| 1429 | struct net_device *p = snl->master; |
| 1430 | struct net_local *nl = (struct net_local *) p->priv; |
| 1431 | |
| 1432 | if( !(snl->state & FL_SLAVE) ) |
| 1433 | return -EINVAL; |
| 1434 | |
| 1435 | spin_lock( &nl->lock ); |
| 1436 | spin_lock( &snl->lock ); |
| 1437 | drop_xmit_queue( dev ); |
| 1438 | |
| 1439 | /* exclude from list */ |
| 1440 | for(;;) { /* must be in list */ |
| 1441 | struct net_local *t = (struct net_local *) p->priv; |
| 1442 | if( t->link == dev ) { |
| 1443 | t->link = snl->link; |
| 1444 | break; |
| 1445 | } |
| 1446 | p = t->link; |
| 1447 | } |
| 1448 | |
| 1449 | snl->link = NULL; |
| 1450 | snl->master = dev; |
| 1451 | snl->state &= ~FL_SLAVE; |
| 1452 | |
| 1453 | netif_start_queue( dev ); |
| 1454 | |
| 1455 | spin_unlock( &snl->lock ); |
| 1456 | spin_unlock( &nl->lock ); |
| 1457 | |
| 1458 | dev_put( dev ); |
| 1459 | return 0; |
| 1460 | } |
| 1461 | |
| 1462 | #endif |
| 1463 | |
| 1464 | |
| 1465 | static struct net_device_stats * |
| 1466 | sbni_get_stats( struct net_device *dev ) |
| 1467 | { |
| 1468 | return &((struct net_local *) dev->priv)->stats; |
| 1469 | } |
| 1470 | |
| 1471 | |
| 1472 | static void |
| 1473 | set_multicast_list( struct net_device *dev ) |
| 1474 | { |
| 1475 | return; /* sbni always operate in promiscuos mode */ |
| 1476 | } |
| 1477 | |
| 1478 | |
| 1479 | #ifdef MODULE |
| 1480 | module_param_array(io, int, NULL, 0); |
| 1481 | module_param_array(irq, int, NULL, 0); |
| 1482 | module_param_array(baud, int, NULL, 0); |
| 1483 | module_param_array(rxl, int, NULL, 0); |
| 1484 | module_param_array(mac, int, NULL, 0); |
| 1485 | module_param(skip_pci_probe, bool, 0); |
| 1486 | |
| 1487 | MODULE_LICENSE("GPL"); |
| 1488 | |
| 1489 | |
Sam Ravnborg | 471a24c | 2006-03-20 22:34:52 -0800 | [diff] [blame] | 1490 | int __init init_module( void ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1491 | { |
| 1492 | struct net_device *dev; |
| 1493 | int err; |
| 1494 | |
| 1495 | while( num < SBNI_MAX_NUM_CARDS ) { |
| 1496 | dev = alloc_netdev(sizeof(struct net_local), |
| 1497 | "sbni%d", sbni_devsetup); |
| 1498 | if( !dev) |
| 1499 | break; |
| 1500 | |
| 1501 | sprintf( dev->name, "sbni%d", num ); |
| 1502 | |
| 1503 | err = sbni_init(dev); |
| 1504 | if (err) { |
| 1505 | free_netdev(dev); |
| 1506 | break; |
| 1507 | } |
| 1508 | |
| 1509 | if( register_netdev( dev ) ) { |
| 1510 | release_region( dev->base_addr, SBNI_IO_EXTENT ); |
| 1511 | free_netdev( dev ); |
| 1512 | break; |
| 1513 | } |
| 1514 | } |
| 1515 | |
| 1516 | return *sbni_cards ? 0 : -ENODEV; |
| 1517 | } |
| 1518 | |
| 1519 | void |
| 1520 | cleanup_module( void ) |
| 1521 | { |
| 1522 | struct net_device *dev; |
| 1523 | int num; |
| 1524 | |
| 1525 | for( num = 0; num < SBNI_MAX_NUM_CARDS; ++num ) |
| 1526 | if( (dev = sbni_cards[ num ]) != NULL ) { |
| 1527 | unregister_netdev( dev ); |
| 1528 | release_region( dev->base_addr, SBNI_IO_EXTENT ); |
| 1529 | free_netdev( dev ); |
| 1530 | } |
| 1531 | } |
| 1532 | |
| 1533 | #else /* MODULE */ |
| 1534 | |
| 1535 | static int __init |
| 1536 | sbni_setup( char *p ) |
| 1537 | { |
| 1538 | int n, parm; |
| 1539 | |
| 1540 | if( *p++ != '(' ) |
| 1541 | goto bad_param; |
| 1542 | |
| 1543 | for( n = 0, parm = 0; *p && n < 8; ) { |
| 1544 | (*dest[ parm ])[ n ] = simple_strtol( p, &p, 0 ); |
| 1545 | if( !*p || *p == ')' ) |
| 1546 | return 1; |
| 1547 | if( *p == ';' ) |
| 1548 | ++p, ++n, parm = 0; |
| 1549 | else if( *p++ != ',' ) |
| 1550 | break; |
| 1551 | else |
| 1552 | if( ++parm >= 5 ) |
| 1553 | break; |
| 1554 | } |
| 1555 | bad_param: |
| 1556 | printk( KERN_ERR "Error in sbni kernel parameter!\n" ); |
| 1557 | return 0; |
| 1558 | } |
| 1559 | |
| 1560 | __setup( "sbni=", sbni_setup ); |
| 1561 | |
| 1562 | #endif /* MODULE */ |
| 1563 | |
| 1564 | /* -------------------------------------------------------------------------- */ |
| 1565 | |
| 1566 | #ifdef ASM_CRC |
| 1567 | |
| 1568 | static u32 |
| 1569 | calc_crc32( u32 crc, u8 *p, u32 len ) |
| 1570 | { |
| 1571 | register u32 _crc; |
| 1572 | _crc = crc; |
| 1573 | |
| 1574 | __asm__ __volatile__ ( |
| 1575 | "xorl %%ebx, %%ebx\n" |
| 1576 | "movl %2, %%esi\n" |
| 1577 | "movl %3, %%ecx\n" |
| 1578 | "movl $crc32tab, %%edi\n" |
| 1579 | "shrl $2, %%ecx\n" |
| 1580 | "jz 1f\n" |
| 1581 | |
| 1582 | ".align 4\n" |
| 1583 | "0:\n" |
| 1584 | "movb %%al, %%bl\n" |
| 1585 | "movl (%%esi), %%edx\n" |
| 1586 | "shrl $8, %%eax\n" |
| 1587 | "xorb %%dl, %%bl\n" |
| 1588 | "shrl $8, %%edx\n" |
| 1589 | "xorl (%%edi,%%ebx,4), %%eax\n" |
| 1590 | |
| 1591 | "movb %%al, %%bl\n" |
| 1592 | "shrl $8, %%eax\n" |
| 1593 | "xorb %%dl, %%bl\n" |
| 1594 | "shrl $8, %%edx\n" |
| 1595 | "xorl (%%edi,%%ebx,4), %%eax\n" |
| 1596 | |
| 1597 | "movb %%al, %%bl\n" |
| 1598 | "shrl $8, %%eax\n" |
| 1599 | "xorb %%dl, %%bl\n" |
| 1600 | "movb %%dh, %%dl\n" |
| 1601 | "xorl (%%edi,%%ebx,4), %%eax\n" |
| 1602 | |
| 1603 | "movb %%al, %%bl\n" |
| 1604 | "shrl $8, %%eax\n" |
| 1605 | "xorb %%dl, %%bl\n" |
| 1606 | "addl $4, %%esi\n" |
| 1607 | "xorl (%%edi,%%ebx,4), %%eax\n" |
| 1608 | |
| 1609 | "decl %%ecx\n" |
| 1610 | "jnz 0b\n" |
| 1611 | |
| 1612 | "1:\n" |
| 1613 | "movl %3, %%ecx\n" |
| 1614 | "andl $3, %%ecx\n" |
| 1615 | "jz 2f\n" |
| 1616 | |
| 1617 | "movb %%al, %%bl\n" |
| 1618 | "shrl $8, %%eax\n" |
| 1619 | "xorb (%%esi), %%bl\n" |
| 1620 | "xorl (%%edi,%%ebx,4), %%eax\n" |
| 1621 | |
| 1622 | "decl %%ecx\n" |
| 1623 | "jz 2f\n" |
| 1624 | |
| 1625 | "movb %%al, %%bl\n" |
| 1626 | "shrl $8, %%eax\n" |
| 1627 | "xorb 1(%%esi), %%bl\n" |
| 1628 | "xorl (%%edi,%%ebx,4), %%eax\n" |
| 1629 | |
| 1630 | "decl %%ecx\n" |
| 1631 | "jz 2f\n" |
| 1632 | |
| 1633 | "movb %%al, %%bl\n" |
| 1634 | "shrl $8, %%eax\n" |
| 1635 | "xorb 2(%%esi), %%bl\n" |
| 1636 | "xorl (%%edi,%%ebx,4), %%eax\n" |
| 1637 | "2:\n" |
| 1638 | : "=a" (_crc) |
| 1639 | : "0" (_crc), "g" (p), "g" (len) |
| 1640 | : "bx", "cx", "dx", "si", "di" |
| 1641 | ); |
| 1642 | |
| 1643 | return _crc; |
| 1644 | } |
| 1645 | |
| 1646 | #else /* ASM_CRC */ |
| 1647 | |
| 1648 | static u32 |
| 1649 | calc_crc32( u32 crc, u8 *p, u32 len ) |
| 1650 | { |
| 1651 | while( len-- ) |
| 1652 | crc = CRC32( *p++, crc ); |
| 1653 | |
| 1654 | return crc; |
| 1655 | } |
| 1656 | |
| 1657 | #endif /* ASM_CRC */ |
| 1658 | |
| 1659 | |
| 1660 | static u32 crc32tab[] __attribute__ ((aligned(8))) = { |
| 1661 | 0xD202EF8D, 0xA505DF1B, 0x3C0C8EA1, 0x4B0BBE37, |
| 1662 | 0xD56F2B94, 0xA2681B02, 0x3B614AB8, 0x4C667A2E, |
| 1663 | 0xDCD967BF, 0xABDE5729, 0x32D70693, 0x45D03605, |
| 1664 | 0xDBB4A3A6, 0xACB39330, 0x35BAC28A, 0x42BDF21C, |
| 1665 | 0xCFB5FFE9, 0xB8B2CF7F, 0x21BB9EC5, 0x56BCAE53, |
| 1666 | 0xC8D83BF0, 0xBFDF0B66, 0x26D65ADC, 0x51D16A4A, |
| 1667 | 0xC16E77DB, 0xB669474D, 0x2F6016F7, 0x58672661, |
| 1668 | 0xC603B3C2, 0xB1048354, 0x280DD2EE, 0x5F0AE278, |
| 1669 | 0xE96CCF45, 0x9E6BFFD3, 0x0762AE69, 0x70659EFF, |
| 1670 | 0xEE010B5C, 0x99063BCA, 0x000F6A70, 0x77085AE6, |
| 1671 | 0xE7B74777, 0x90B077E1, 0x09B9265B, 0x7EBE16CD, |
| 1672 | 0xE0DA836E, 0x97DDB3F8, 0x0ED4E242, 0x79D3D2D4, |
| 1673 | 0xF4DBDF21, 0x83DCEFB7, 0x1AD5BE0D, 0x6DD28E9B, |
| 1674 | 0xF3B61B38, 0x84B12BAE, 0x1DB87A14, 0x6ABF4A82, |
| 1675 | 0xFA005713, 0x8D076785, 0x140E363F, 0x630906A9, |
| 1676 | 0xFD6D930A, 0x8A6AA39C, 0x1363F226, 0x6464C2B0, |
| 1677 | 0xA4DEAE1D, 0xD3D99E8B, 0x4AD0CF31, 0x3DD7FFA7, |
| 1678 | 0xA3B36A04, 0xD4B45A92, 0x4DBD0B28, 0x3ABA3BBE, |
| 1679 | 0xAA05262F, 0xDD0216B9, 0x440B4703, 0x330C7795, |
| 1680 | 0xAD68E236, 0xDA6FD2A0, 0x4366831A, 0x3461B38C, |
| 1681 | 0xB969BE79, 0xCE6E8EEF, 0x5767DF55, 0x2060EFC3, |
| 1682 | 0xBE047A60, 0xC9034AF6, 0x500A1B4C, 0x270D2BDA, |
| 1683 | 0xB7B2364B, 0xC0B506DD, 0x59BC5767, 0x2EBB67F1, |
| 1684 | 0xB0DFF252, 0xC7D8C2C4, 0x5ED1937E, 0x29D6A3E8, |
| 1685 | 0x9FB08ED5, 0xE8B7BE43, 0x71BEEFF9, 0x06B9DF6F, |
| 1686 | 0x98DD4ACC, 0xEFDA7A5A, 0x76D32BE0, 0x01D41B76, |
| 1687 | 0x916B06E7, 0xE66C3671, 0x7F6567CB, 0x0862575D, |
| 1688 | 0x9606C2FE, 0xE101F268, 0x7808A3D2, 0x0F0F9344, |
| 1689 | 0x82079EB1, 0xF500AE27, 0x6C09FF9D, 0x1B0ECF0B, |
| 1690 | 0x856A5AA8, 0xF26D6A3E, 0x6B643B84, 0x1C630B12, |
| 1691 | 0x8CDC1683, 0xFBDB2615, 0x62D277AF, 0x15D54739, |
| 1692 | 0x8BB1D29A, 0xFCB6E20C, 0x65BFB3B6, 0x12B88320, |
| 1693 | 0x3FBA6CAD, 0x48BD5C3B, 0xD1B40D81, 0xA6B33D17, |
| 1694 | 0x38D7A8B4, 0x4FD09822, 0xD6D9C998, 0xA1DEF90E, |
| 1695 | 0x3161E49F, 0x4666D409, 0xDF6F85B3, 0xA868B525, |
| 1696 | 0x360C2086, 0x410B1010, 0xD80241AA, 0xAF05713C, |
| 1697 | 0x220D7CC9, 0x550A4C5F, 0xCC031DE5, 0xBB042D73, |
| 1698 | 0x2560B8D0, 0x52678846, 0xCB6ED9FC, 0xBC69E96A, |
| 1699 | 0x2CD6F4FB, 0x5BD1C46D, 0xC2D895D7, 0xB5DFA541, |
| 1700 | 0x2BBB30E2, 0x5CBC0074, 0xC5B551CE, 0xB2B26158, |
| 1701 | 0x04D44C65, 0x73D37CF3, 0xEADA2D49, 0x9DDD1DDF, |
| 1702 | 0x03B9887C, 0x74BEB8EA, 0xEDB7E950, 0x9AB0D9C6, |
| 1703 | 0x0A0FC457, 0x7D08F4C1, 0xE401A57B, 0x930695ED, |
| 1704 | 0x0D62004E, 0x7A6530D8, 0xE36C6162, 0x946B51F4, |
| 1705 | 0x19635C01, 0x6E646C97, 0xF76D3D2D, 0x806A0DBB, |
| 1706 | 0x1E0E9818, 0x6909A88E, 0xF000F934, 0x8707C9A2, |
| 1707 | 0x17B8D433, 0x60BFE4A5, 0xF9B6B51F, 0x8EB18589, |
| 1708 | 0x10D5102A, 0x67D220BC, 0xFEDB7106, 0x89DC4190, |
| 1709 | 0x49662D3D, 0x3E611DAB, 0xA7684C11, 0xD06F7C87, |
| 1710 | 0x4E0BE924, 0x390CD9B2, 0xA0058808, 0xD702B89E, |
| 1711 | 0x47BDA50F, 0x30BA9599, 0xA9B3C423, 0xDEB4F4B5, |
| 1712 | 0x40D06116, 0x37D75180, 0xAEDE003A, 0xD9D930AC, |
| 1713 | 0x54D13D59, 0x23D60DCF, 0xBADF5C75, 0xCDD86CE3, |
| 1714 | 0x53BCF940, 0x24BBC9D6, 0xBDB2986C, 0xCAB5A8FA, |
| 1715 | 0x5A0AB56B, 0x2D0D85FD, 0xB404D447, 0xC303E4D1, |
| 1716 | 0x5D677172, 0x2A6041E4, 0xB369105E, 0xC46E20C8, |
| 1717 | 0x72080DF5, 0x050F3D63, 0x9C066CD9, 0xEB015C4F, |
| 1718 | 0x7565C9EC, 0x0262F97A, 0x9B6BA8C0, 0xEC6C9856, |
| 1719 | 0x7CD385C7, 0x0BD4B551, 0x92DDE4EB, 0xE5DAD47D, |
| 1720 | 0x7BBE41DE, 0x0CB97148, 0x95B020F2, 0xE2B71064, |
| 1721 | 0x6FBF1D91, 0x18B82D07, 0x81B17CBD, 0xF6B64C2B, |
| 1722 | 0x68D2D988, 0x1FD5E91E, 0x86DCB8A4, 0xF1DB8832, |
| 1723 | 0x616495A3, 0x1663A535, 0x8F6AF48F, 0xF86DC419, |
| 1724 | 0x660951BA, 0x110E612C, 0x88073096, 0xFF000000 |
| 1725 | }; |
| 1726 | |