/* sbni.c: Granch SBNI12 leased line adapters driver for linux * * Written 2001 by Denis I.Timofeev (timofeev@granch.ru) * * Previous versions were written by Yaroslav Polyakov, * Alexey Zverev and Max Khon. * * Driver supports SBNI12-02,-04,-05,-10,-11 cards, single and * double-channel, PCI and ISA modifications. * More info and useful utilities to work with SBNI12 cards you can find * at http://www.granch.com (English) or http://www.granch.ru (Russian) * * This software may be used and distributed according to the terms * of the GNU General Public License. * * * 5.0.1 Jun 22 2001 * - Fixed bug in probe * 5.0.0 Jun 06 2001 * - Driver was completely redesigned by Denis I.Timofeev, * - now PCI/Dual, ISA/Dual (with single interrupt line) models are * - supported * 3.3.0 Thu Feb 24 21:30:28 NOVT 2000 * - PCI cards support * 3.2.0 Mon Dec 13 22:26:53 NOVT 1999 * - Completely rebuilt all the packet storage system * - to work in Ethernet-like style. * 3.1.1 just fixed some bugs (5 aug 1999) * 3.1.0 added balancing feature (26 apr 1999) * 3.0.1 just fixed some bugs (14 apr 1999). * 3.0.0 Initial Revision, Yaroslav Polyakov (24 Feb 1999) * - added pre-calculation for CRC, fixed bug with "len-2" frames, * - removed outbound fragmentation (MTU=1000), written CRC-calculation * - on asm, added work with hard_headers and now we have our own cache * - for them, optionally supported word-interchange on some chipsets, * * Known problem: this driver wasn't tested on multiprocessor machine. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "sbni.h" /* device private data */ struct net_local { struct timer_list watchdog; struct net_device *watchdog_dev; spinlock_t lock; struct sk_buff *rx_buf_p; /* receive buffer ptr */ struct sk_buff *tx_buf_p; /* transmit buffer ptr */ unsigned int framelen; /* current frame length */ unsigned int maxframe; /* maximum valid frame length */ unsigned int state; unsigned int inppos, outpos; /* positions in rx/tx buffers */ /* transmitting frame number - from frames qty to 1 */ unsigned int tx_frameno; /* expected number of next receiving frame */ unsigned int wait_frameno; /* count of failed attempts to frame send - 32 attempts do before error - while receiver tunes on opposite side of wire */ unsigned int trans_errors; /* idle time; send pong when limit exceeded */ unsigned int timer_ticks; /* fields used for receive level autoselection */ int delta_rxl; unsigned int cur_rxl_index, timeout_rxl; unsigned long cur_rxl_rcvd, prev_rxl_rcvd; struct sbni_csr1 csr1; /* current value of CSR1 */ struct sbni_in_stats in_stats; /* internal statistics */ struct net_device *second; /* for ISA/dual cards */ #ifdef CONFIG_SBNI_MULTILINE struct net_device *master; struct net_device *link; #endif }; static int sbni_card_probe( unsigned long ); static int sbni_pci_probe( struct net_device * ); static struct net_device *sbni_probe1(struct net_device *, unsigned long, int); static int sbni_open( struct net_device * ); static int sbni_close( struct net_device * ); static netdev_tx_t sbni_start_xmit(struct sk_buff *, struct net_device * ); static int sbni_siocdevprivate(struct net_device *, struct ifreq *, void __user *, int); static void set_multicast_list( struct net_device * ); static irqreturn_t sbni_interrupt( int, void * ); static void handle_channel( struct net_device * ); static int recv_frame( struct net_device * ); static void send_frame( struct net_device * ); static int upload_data( struct net_device *, unsigned, unsigned, unsigned, u32 ); static void download_data( struct net_device *, u32 * ); static void sbni_watchdog(struct timer_list *); static void interpret_ack( struct net_device *, unsigned ); static int append_frame_to_pkt( struct net_device *, unsigned, u32 ); static void indicate_pkt( struct net_device * ); static void card_start( struct net_device * ); static void prepare_to_send( struct sk_buff *, struct net_device * ); static void drop_xmit_queue( struct net_device * ); static void send_frame_header( struct net_device *, u32 * ); static int skip_tail( unsigned int, unsigned int, u32 ); static int check_fhdr( u32, u32 *, u32 *, u32 *, u32 *, u32 * ); static void change_level( struct net_device * ); static void timeout_change_level( struct net_device * ); static u32 calc_crc32( u32, u8 *, u32 ); static struct sk_buff * get_rx_buf( struct net_device * ); static int sbni_init( struct net_device * ); #ifdef CONFIG_SBNI_MULTILINE static int enslave( struct net_device *, struct net_device * ); static int emancipate( struct net_device * ); #endif static const char version[] = "Granch SBNI12 driver ver 5.0.1 Jun 22 2001 Denis I.Timofeev.\n"; static bool skip_pci_probe __initdata = false; static int scandone __initdata = 0; static int num __initdata = 0; static unsigned char rxl_tab[]; static u32 crc32tab[]; /* A list of all installed devices, for removing the driver module. */ static struct net_device *sbni_cards[ SBNI_MAX_NUM_CARDS ]; /* Lists of device's parameters */ static u32 io[ SBNI_MAX_NUM_CARDS ] __initdata = { [0 ... SBNI_MAX_NUM_CARDS-1] = -1 }; static u32 irq[ SBNI_MAX_NUM_CARDS ] __initdata; static u32 baud[ SBNI_MAX_NUM_CARDS ] __initdata; static u32 rxl[ SBNI_MAX_NUM_CARDS ] __initdata = { [0 ... SBNI_MAX_NUM_CARDS-1] = -1 }; static u32 mac[ SBNI_MAX_NUM_CARDS ] __initdata; #ifndef MODULE typedef u32 iarr[]; static iarr *dest[5] __initdata = { &io, &irq, &baud, &rxl, &mac }; #endif /* A zero-terminated list of I/O addresses to be probed on ISA bus */ static unsigned int netcard_portlist[ ] __initdata = { 0x210, 0x214, 0x220, 0x224, 0x230, 0x234, 0x240, 0x244, 0x250, 0x254, 0x260, 0x264, 0x270, 0x274, 0x280, 0x284, 0x290, 0x294, 0x2a0, 0x2a4, 0x2b0, 0x2b4, 0x2c0, 0x2c4, 0x2d0, 0x2d4, 0x2e0, 0x2e4, 0x2f0, 0x2f4, 0 }; #define NET_LOCAL_LOCK(dev) (((struct net_local *)netdev_priv(dev))->lock) /* * Look for SBNI card which addr stored in dev->base_addr, if nonzero. * Otherwise, look through PCI bus. If none PCI-card was found, scan ISA. */ static inline int __init sbni_isa_probe( struct net_device *dev ) { if( dev->base_addr > 0x1ff && request_region( dev->base_addr, SBNI_IO_EXTENT, dev->name ) && sbni_probe1( dev, dev->base_addr, dev->irq ) ) return 0; else { pr_err("base address 0x%lx is busy, or adapter is malfunctional!\n", dev->base_addr); return -ENODEV; } } static const struct net_device_ops sbni_netdev_ops = { .ndo_open = sbni_open, .ndo_stop = sbni_close, .ndo_start_xmit = sbni_start_xmit, .ndo_set_rx_mode = set_multicast_list, .ndo_siocdevprivate = sbni_siocdevprivate, .ndo_set_mac_address = eth_mac_addr, .ndo_validate_addr = eth_validate_addr, }; static void __init sbni_devsetup(struct net_device *dev) { ether_setup( dev ); dev->netdev_ops = &sbni_netdev_ops; } int __init sbni_probe(int unit) { struct net_device *dev; int err; dev = alloc_netdev(sizeof(struct net_local), "sbni", NET_NAME_UNKNOWN, sbni_devsetup); if (!dev) return -ENOMEM; dev->netdev_ops = &sbni_netdev_ops; sprintf(dev->name, "sbni%d", unit); netdev_boot_setup_check(dev); err = sbni_init(dev); if (err) { free_netdev(dev); return err; } err = register_netdev(dev); if (err) { release_region( dev->base_addr, SBNI_IO_EXTENT ); free_netdev(dev); return err; } pr_info_once("%s", version); return 0; } static int __init sbni_init(struct net_device *dev) { int i; if( dev->base_addr ) return sbni_isa_probe( dev ); /* otherwise we have to perform search our adapter */ if( io[ num ] != -1 ) { dev->base_addr = io[ num ]; dev->irq = irq[ num ]; } else if( scandone || io[ 0 ] != -1 ) { return -ENODEV; } /* if io[ num ] contains non-zero address, then that is on ISA bus */ if( dev->base_addr ) return sbni_isa_probe( dev ); /* ...otherwise - scan PCI first */ if( !skip_pci_probe && !sbni_pci_probe( dev ) ) return 0; if( io[ num ] == -1 ) { /* Auto-scan will be stopped when first ISA card were found */ scandone = 1; if( num > 0 ) return -ENODEV; } for( i = 0; netcard_portlist[ i ]; ++i ) { int ioaddr = netcard_portlist[ i ]; if( request_region( ioaddr, SBNI_IO_EXTENT, dev->name ) && sbni_probe1( dev, ioaddr, 0 )) return 0; } return -ENODEV; } static int __init sbni_pci_probe( struct net_device *dev ) { struct pci_dev *pdev = NULL; while( (pdev = pci_get_class( PCI_CLASS_NETWORK_OTHER << 8, pdev )) != NULL ) { int pci_irq_line; unsigned long pci_ioaddr; if( pdev->vendor != SBNI_PCI_VENDOR && pdev->device != SBNI_PCI_DEVICE ) continue; pci_ioaddr = pci_resource_start( pdev, 0 ); pci_irq_line = pdev->irq; /* Avoid already found cards from previous calls */ if( !request_region( pci_ioaddr, SBNI_IO_EXTENT, dev->name ) ) { if (pdev->subsystem_device != 2) continue; /* Dual adapter is present */ if (!request_region(pci_ioaddr += 4, SBNI_IO_EXTENT, dev->name ) ) continue; } if (pci_irq_line <= 0 || pci_irq_line >= nr_irqs) pr_warn( "WARNING: The PCI BIOS assigned this PCI card to IRQ %d, which is unlikely to work!.\n" "You should use the PCI BIOS setup to assign a valid IRQ line.\n", pci_irq_line ); /* avoiding re-enable dual adapters */ if( (pci_ioaddr & 7) == 0 && pci_enable_device( pdev ) ) { release_region( pci_ioaddr, SBNI_IO_EXTENT ); pci_dev_put( pdev ); return -EIO; } if( sbni_probe1( dev, pci_ioaddr, pci_irq_line ) ) { SET_NETDEV_DEV(dev, &pdev->dev); /* not the best thing to do, but this is all messed up for hotplug systems anyway... */ pci_dev_put( pdev ); return 0; } } return -ENODEV; } static struct net_device * __init sbni_probe1( struct net_device *dev, unsigned long ioaddr, int irq ) { struct net_local *nl; if( sbni_card_probe( ioaddr ) ) { release_region( ioaddr, SBNI_IO_EXTENT ); return NULL; } outb( 0, ioaddr + CSR0 ); if( irq < 2 ) { unsigned long irq_mask; irq_mask = probe_irq_on(); outb( EN_INT | TR_REQ, ioaddr + CSR0 ); outb( PR_RES, ioaddr + CSR1 ); mdelay(50); irq = probe_irq_off(irq_mask); outb( 0, ioaddr + CSR0 ); if( !irq ) { pr_err("%s: can't detect device irq!\n", dev->name); release_region( ioaddr, SBNI_IO_EXTENT ); return NULL; } } else if( irq == 2 ) irq = 9; dev->irq = irq; dev->base_addr = ioaddr; /* Fill in sbni-specific dev fields. */ nl = netdev_priv(dev); if( !nl ) { pr_err("%s: unable to get memory!\n", dev->name); release_region( ioaddr, SBNI_IO_EXTENT ); return NULL; } memset( nl, 0, sizeof(struct net_local) ); spin_lock_init( &nl->lock ); /* store MAC address (generate if that isn't known) */ *(__be16 *)dev->dev_addr = htons( 0x00ff ); *(__be32 *)(dev->dev_addr + 2) = htonl( 0x01000000 | ((mac[num] ? mac[num] : (u32)((long)netdev_priv(dev))) & 0x00ffffff)); /* store link settings (speed, receive level ) */ nl->maxframe = DEFAULT_FRAME_LEN; nl->csr1.rate = baud[ num ]; if( (nl->cur_rxl_index = rxl[ num ]) == -1 ) { /* autotune rxl */ nl->cur_rxl_index = DEF_RXL; nl->delta_rxl = DEF_RXL_DELTA; } else { nl->delta_rxl = 0; } nl->csr1.rxl = rxl_tab[ nl->cur_rxl_index ]; if( inb( ioaddr + CSR0 ) & 0x01 ) nl->state |= FL_SLOW_MODE; pr_notice("%s: ioaddr %#lx, irq %d, MAC: 00:ff:01:%02x:%02x:%02x\n", dev->name, dev->base_addr, dev->irq, ((u8 *)dev->dev_addr)[3], ((u8 *)dev->dev_addr)[4], ((u8 *)dev->dev_addr)[5]); pr_notice("%s: speed %d", dev->name, ((nl->state & FL_SLOW_MODE) ? 500000 : 2000000) / (1 << nl->csr1.rate)); if( nl->delta_rxl == 0 ) pr_cont(", receive level 0x%x (fixed)\n", nl->cur_rxl_index); else pr_cont(", receive level (auto)\n"); #ifdef CONFIG_SBNI_MULTILINE nl->master = dev; nl->link = NULL; #endif sbni_cards[ num++ ] = dev; return dev; } /* -------------------------------------------------------------------------- */ #ifdef CONFIG_SBNI_MULTILINE static netdev_tx_t sbni_start_xmit( struct sk_buff *skb, struct net_device *dev ) { struct net_device *p; netif_stop_queue( dev ); /* Looking for idle device in the list */ for( p = dev; p; ) { struct net_local *nl = netdev_priv(p); spin_lock( &nl->lock ); if( nl->tx_buf_p || (nl->state & FL_LINE_DOWN) ) { p = nl->link; spin_unlock( &nl->lock ); } else { /* Idle dev is found */ prepare_to_send( skb, p ); spin_unlock( &nl->lock ); netif_start_queue( dev ); return NETDEV_TX_OK; } } return NETDEV_TX_BUSY; } #else /* CONFIG_SBNI_MULTILINE */ static netdev_tx_t sbni_start_xmit( struct sk_buff *skb, struct net_device *dev ) { struct net_local *nl = netdev_priv(dev); netif_stop_queue( dev ); spin_lock( &nl->lock ); prepare_to_send( skb, dev ); spin_unlock( &nl->lock ); return NETDEV_TX_OK; } #endif /* CONFIG_SBNI_MULTILINE */ /* -------------------------------------------------------------------------- */ /* interrupt handler */ /* * SBNI12D-10, -11/ISA boards within "common interrupt" mode could not * be looked as two independent single-channel devices. Every channel seems * as Ethernet interface but interrupt handler must be common. Really, first * channel ("master") driver only registers the handler. In its struct net_local * it has got pointer to "slave" channel's struct net_local and handles that's * interrupts too. * dev of successfully attached ISA SBNI boards is linked to list. * While next board driver is initialized, it scans this list. If one * has found dev with same irq and ioaddr different by 4 then it assumes * this board to be "master". */ static irqreturn_t sbni_interrupt( int irq, void *dev_id ) { struct net_device *dev = dev_id; struct net_local *nl = netdev_priv(dev); int repeat; spin_lock( &nl->lock ); if( nl->second ) spin_lock(&NET_LOCAL_LOCK(nl->second)); do { repeat = 0; if( inb( dev->base_addr + CSR0 ) & (RC_RDY | TR_RDY) ) { handle_channel( dev ); repeat = 1; } if( nl->second && /* second channel present */ (inb( nl->second->base_addr+CSR0 ) & (RC_RDY | TR_RDY)) ) { handle_channel( nl->second ); repeat = 1; } } while( repeat ); if( nl->second ) spin_unlock(&NET_LOCAL_LOCK(nl->second)); spin_unlock( &nl->lock ); return IRQ_HANDLED; } static void handle_channel( struct net_device *dev ) { struct net_local *nl = netdev_priv(dev); unsigned long ioaddr = dev->base_addr; int req_ans; unsigned char csr0; #ifdef CONFIG_SBNI_MULTILINE /* Lock the master device because we going to change its local data */ if( nl->state & FL_SLAVE ) spin_lock(&NET_LOCAL_LOCK(nl->master)); #endif outb( (inb( ioaddr + CSR0 ) & ~EN_INT) | TR_REQ, ioaddr + CSR0 ); nl->timer_ticks = CHANGE_LEVEL_START_TICKS; for(;;) { csr0 = inb( ioaddr + CSR0 ); if( ( csr0 & (RC_RDY | TR_RDY) ) == 0 ) break; req_ans = !(nl->state & FL_PREV_OK); if( csr0 & RC_RDY ) req_ans = recv_frame( dev ); /* * TR_RDY always equals 1 here because we have owned the marker, * and we set TR_REQ when disabled interrupts */ csr0 = inb( ioaddr + CSR0 ); if( !(csr0 & TR_RDY) || (csr0 & RC_RDY) ) netdev_err(dev, "internal error!\n"); /* if state & FL_NEED_RESEND != 0 then tx_frameno != 0 */ if( req_ans || nl->tx_frameno != 0 ) send_frame( dev ); else /* send marker without any data */ outb( inb( ioaddr + CSR0 ) & ~TR_REQ, ioaddr + CSR0 ); } outb( inb( ioaddr + CSR0 ) | EN_INT, ioaddr + CSR0 ); #ifdef CONFIG_SBNI_MULTILINE if( nl->state & FL_SLAVE ) spin_unlock(&NET_LOCAL_LOCK(nl->master)); #endif } /* * Routine returns 1 if it needs to acknowledge received frame. * Empty frame received without errors won't be acknowledged. */ static int recv_frame( struct net_device *dev ) { struct net_local *nl = netdev_priv(dev); unsigned long ioaddr = dev->base_addr; u32 crc = CRC32_INITIAL; unsigned framelen = 0, frameno, ack; unsigned is_first, frame_ok = 0; if( check_fhdr( ioaddr, &framelen, &frameno, &ack, &is_first, &crc ) ) { frame_ok = framelen > 4 ? upload_data( dev, framelen, frameno, is_first, crc ) : skip_tail( ioaddr, framelen, crc ); if( frame_ok ) interpret_ack( dev, ack ); } outb( inb( ioaddr + CSR0 ) ^ CT_ZER, ioaddr + CSR0 ); if( frame_ok ) { nl->state |= FL_PREV_OK; if( framelen > 4 ) nl->in_stats.all_rx_number++; } else { nl->state &= ~FL_PREV_OK; change_level( dev ); nl->in_stats.all_rx_number++; nl->in_stats.bad_rx_number++; } return !frame_ok || framelen > 4; } static void send_frame( struct net_device *dev ) { struct net_local *nl = netdev_priv(dev); u32 crc = CRC32_INITIAL; if( nl->state & FL_NEED_RESEND ) { /* if frame was sended but not ACK'ed - resend it */ if( nl->trans_errors ) { --nl->trans_errors; if( nl->framelen != 0 ) nl->in_stats.resend_tx_number++; } else { /* cannot xmit with many attempts */ #ifdef CONFIG_SBNI_MULTILINE if( (nl->state & FL_SLAVE) || nl->link ) #endif nl->state |= FL_LINE_DOWN; drop_xmit_queue( dev ); goto do_send; } } else nl->trans_errors = TR_ERROR_COUNT; send_frame_header( dev, &crc ); nl->state |= FL_NEED_RESEND; /* * FL_NEED_RESEND will be cleared after ACK, but if empty * frame sended then in prepare_to_send next frame */ if( nl->framelen ) { download_data( dev, &crc ); nl->in_stats.all_tx_number++; nl->state |= FL_WAIT_ACK; } outsb( dev->base_addr + DAT, (u8 *)&crc, sizeof crc ); do_send: outb( inb( dev->base_addr + CSR0 ) & ~TR_REQ, dev->base_addr + CSR0 ); if( nl->tx_frameno ) /* next frame exists - we request card to send it */ outb( inb( dev->base_addr + CSR0 ) | TR_REQ, dev->base_addr + CSR0 ); } /* * Write the frame data into adapter's buffer memory, and calculate CRC. * Do padding if necessary. */ static void download_data( struct net_device *dev, u32 *crc_p ) { struct net_local *nl = netdev_priv(dev); struct sk_buff *skb = nl->tx_buf_p; unsigned len = min_t(unsigned int, skb->len - nl->outpos, nl->framelen); outsb( dev->base_addr + DAT, skb->data + nl->outpos, len ); *crc_p = calc_crc32( *crc_p, skb->data + nl->outpos, len ); /* if packet too short we should write some more bytes to pad */ for( len = nl->framelen - len; len--; ) { outb( 0, dev->base_addr + DAT ); *crc_p = CRC32( 0, *crc_p ); } } static int upload_data( struct net_device *dev, unsigned framelen, unsigned frameno, unsigned is_first, u32 crc ) { struct net_local *nl = netdev_priv(dev); int frame_ok; if( is_first ) { nl->wait_frameno = frameno; nl->inppos = 0; } if( nl->wait_frameno == frameno ) { if( nl->inppos + framelen <= ETHER_MAX_LEN ) frame_ok = append_frame_to_pkt( dev, framelen, crc ); /* * if CRC is right but framelen incorrect then transmitter * error was occurred... drop entire packet */ else if( (frame_ok = skip_tail( dev->base_addr, framelen, crc )) != 0 ) { nl->wait_frameno = 0; nl->inppos = 0; #ifdef CONFIG_SBNI_MULTILINE nl->master->stats.rx_errors++; nl->master->stats.rx_missed_errors++; #else dev->stats.rx_errors++; dev->stats.rx_missed_errors++; #endif } /* now skip all frames until is_first != 0 */ } else frame_ok = skip_tail( dev->base_addr, framelen, crc ); if( is_first && !frame_ok ) { /* * Frame has been broken, but we had already stored * is_first... Drop entire packet. */ nl->wait_frameno = 0; #ifdef CONFIG_SBNI_MULTILINE nl->master->stats.rx_errors++; nl->master->stats.rx_crc_errors++; #else dev->stats.rx_errors++; dev->stats.rx_crc_errors++; #endif } return frame_ok; } static inline void send_complete( struct net_device *dev ) { struct net_local *nl = netdev_priv(dev); #ifdef CONFIG_SBNI_MULTILINE nl->master->stats.tx_packets++; nl->master->stats.tx_bytes += nl->tx_buf_p->len; #else dev->stats.tx_packets++; dev->stats.tx_bytes += nl->tx_buf_p->len; #endif dev_consume_skb_irq(nl->tx_buf_p); nl->tx_buf_p = NULL; nl->outpos = 0; nl->state &= ~(FL_WAIT_ACK | FL_NEED_RESEND); nl->framelen = 0; } static void interpret_ack( struct net_device *dev, unsigned ack ) { struct net_local *nl = netdev_priv(dev); if( ack == FRAME_SENT_OK ) { nl->state &= ~FL_NEED_RESEND; if( nl->state & FL_WAIT_ACK ) { nl->outpos += nl->framelen; if( --nl->tx_frameno ) { nl->framelen = min_t(unsigned int, nl->maxframe, nl->tx_buf_p->len - nl->outpos); } else { send_complete( dev ); #ifdef CONFIG_SBNI_MULTILINE netif_wake_queue( nl->master ); #else netif_wake_queue( dev ); #endif } } } nl->state &= ~FL_WAIT_ACK; } /* * Glue received frame with previous fragments of packet. * Indicate packet when last frame would be accepted. */ static int append_frame_to_pkt( struct net_device *dev, unsigned framelen, u32 crc ) { struct net_local *nl = netdev_priv(dev); u8 *p; if( nl->inppos + framelen > ETHER_MAX_LEN ) return 0; if( !nl->rx_buf_p && !(nl->rx_buf_p = get_rx_buf( dev )) ) return 0; p = nl->rx_buf_p->data + nl->inppos; insb( dev->base_addr + DAT, p, framelen ); if( calc_crc32( crc, p, framelen ) != CRC32_REMAINDER ) return 0; nl->inppos += framelen - 4; if( --nl->wait_frameno == 0 ) /* last frame received */ indicate_pkt( dev ); return 1; } /* * Prepare to start output on adapter. * Transmitter will be actually activated when marker is accepted. */ static void prepare_to_send( struct sk_buff *skb, struct net_device *dev ) { struct net_local *nl = netdev_priv(dev); unsigned int len; /* nl->tx_buf_p == NULL here! */ if( nl->tx_buf_p ) netdev_err(dev, "memory leak!\n"); nl->outpos = 0; nl->state &= ~(FL_WAIT_ACK | FL_NEED_RESEND); len = skb->len; if( len < SBNI_MIN_LEN ) len = SBNI_MIN_LEN; nl->tx_buf_p = skb; nl->tx_frameno = DIV_ROUND_UP(len, nl->maxframe); nl->framelen = len < nl->maxframe ? len : nl->maxframe; outb( inb( dev->base_addr + CSR0 ) | TR_REQ, dev->base_addr + CSR0 ); #ifdef CONFIG_SBNI_MULTILINE netif_trans_update(nl->master); #else netif_trans_update(dev); #endif } static void drop_xmit_queue( struct net_device *dev ) { struct net_local *nl = netdev_priv(dev); if( nl->tx_buf_p ) { dev_kfree_skb_any( nl->tx_buf_p ); nl->tx_buf_p = NULL; #ifdef CONFIG_SBNI_MULTILINE nl->master->stats.tx_errors++; nl->master->stats.tx_carrier_errors++; #else dev->stats.tx_errors++; dev->stats.tx_carrier_errors++; #endif } nl->tx_frameno = 0; nl->framelen = 0; nl->outpos = 0; nl->state &= ~(FL_WAIT_ACK | FL_NEED_RESEND); #ifdef CONFIG_SBNI_MULTILINE netif_start_queue( nl->master ); netif_trans_update(nl->master); #else netif_start_queue( dev ); netif_trans_update(dev); #endif } static void send_frame_header( struct net_device *dev, u32 *crc_p ) { struct net_local *nl = netdev_priv(dev); u32 crc = *crc_p; u32 len_field = nl->framelen + 6; /* CRC + frameno + reserved */ u8 value; if( nl->state & FL_NEED_RESEND ) len_field |= FRAME_RETRY; /* non-first attempt... */ if( nl->outpos == 0 ) len_field |= FRAME_FIRST; len_field |= (nl->state & FL_PREV_OK) ? FRAME_SENT_OK : FRAME_SENT_BAD; outb( SBNI_SIG, dev->base_addr + DAT ); value = (u8) len_field; outb( value, dev->base_addr + DAT ); crc = CRC32( value, crc ); value = (u8) (len_field >> 8); outb( value, dev->base_addr + DAT ); crc = CRC32( value, crc ); outb( nl->tx_frameno, dev->base_addr + DAT ); crc = CRC32( nl->tx_frameno, crc ); outb( 0, dev->base_addr + DAT ); crc = CRC32( 0, crc ); *crc_p = crc; } /* * if frame tail not needed (incorrect number or received twice), * it won't store, but CRC will be calculated */ static int skip_tail( unsigned int ioaddr, unsigned int tail_len, u32 crc ) { while( tail_len-- ) crc = CRC32( inb( ioaddr + DAT ), crc ); return crc == CRC32_REMAINDER; } /* * Preliminary checks if frame header is correct, calculates its CRC * and split it to simple fields */ static int check_fhdr( u32 ioaddr, u32 *framelen, u32 *frameno, u32 *ack, u32 *is_first, u32 *crc_p ) { u32 crc = *crc_p; u8 value; if( inb( ioaddr + DAT ) != SBNI_SIG ) return 0; value = inb( ioaddr + DAT ); *framelen = (u32)value; crc = CRC32( value, crc ); value = inb( ioaddr + DAT ); *framelen |= ((u32)value) << 8; crc = CRC32( value, crc ); *ack = *framelen & FRAME_ACK_MASK; *is_first = (*framelen & FRAME_FIRST) != 0; if( (*framelen &= FRAME_LEN_MASK) < 6 || *framelen > SBNI_MAX_FRAME - 3 ) return 0; value = inb( ioaddr + DAT ); *frameno = (u32)value; crc = CRC32( value, crc ); crc = CRC32( inb( ioaddr + DAT ), crc ); /* reserved byte */ *framelen -= 2; *crc_p = crc; return 1; } static struct sk_buff * get_rx_buf( struct net_device *dev ) { /* +2 is to compensate for the alignment fixup below */ struct sk_buff *skb = dev_alloc_skb( ETHER_MAX_LEN + 2 ); if( !skb ) return NULL; skb_reserve( skb, 2 ); /* Align IP on longword boundaries */ return skb; } static void indicate_pkt( struct net_device *dev ) { struct net_local *nl = netdev_priv(dev); struct sk_buff *skb = nl->rx_buf_p; skb_put( skb, nl->inppos ); #ifdef CONFIG_SBNI_MULTILINE skb->protocol = eth_type_trans( skb, nl->master ); netif_rx( skb ); ++nl->master->stats.rx_packets; nl->master->stats.rx_bytes += nl->inppos; #else skb->protocol = eth_type_trans( skb, dev ); netif_rx( skb ); ++dev->stats.rx_packets; dev->stats.rx_bytes += nl->inppos; #endif nl->rx_buf_p = NULL; /* protocol driver will clear this sk_buff */ } /* -------------------------------------------------------------------------- */ /* * Routine checks periodically wire activity and regenerates marker if * connect was inactive for a long time. */ static void sbni_watchdog(struct timer_list *t) { struct net_local *nl = from_timer(nl, t, watchdog); struct net_device *dev = nl->watchdog_dev; unsigned long flags; unsigned char csr0; spin_lock_irqsave( &nl->lock, flags ); csr0 = inb( dev->base_addr + CSR0 ); if( csr0 & RC_CHK ) { if( nl->timer_ticks ) { if( csr0 & (RC_RDY | BU_EMP) ) /* receiving not active */ nl->timer_ticks--; } else { nl->in_stats.timeout_number++; if( nl->delta_rxl ) timeout_change_level( dev ); outb( *(u_char *)&nl->csr1 | PR_RES, dev->base_addr + CSR1 ); csr0 = inb( dev->base_addr + CSR0 ); } } else nl->state &= ~FL_LINE_DOWN; outb( csr0 | RC_CHK, dev->base_addr + CSR0 ); mod_timer(t, jiffies + SBNI_TIMEOUT); spin_unlock_irqrestore( &nl->lock, flags ); } static unsigned char rxl_tab[] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x08, 0x0a, 0x0c, 0x0f, 0x16, 0x18, 0x1a, 0x1c, 0x1f }; #define SIZE_OF_TIMEOUT_RXL_TAB 4 static unsigned char timeout_rxl_tab[] = { 0x03, 0x05, 0x08, 0x0b }; /* -------------------------------------------------------------------------- */ static void card_start( struct net_device *dev ) { struct net_local *nl = netdev_priv(dev); nl->timer_ticks = CHANGE_LEVEL_START_TICKS; nl->state &= ~(FL_WAIT_ACK | FL_NEED_RESEND); nl->state |= FL_PREV_OK; nl->inppos = nl->outpos = 0; nl->wait_frameno = 0; nl->tx_frameno = 0; nl->framelen = 0; outb( *(u_char *)&nl->csr1 | PR_RES, dev->base_addr + CSR1 ); outb( EN_INT, dev->base_addr + CSR0 ); } /* -------------------------------------------------------------------------- */ /* Receive level auto-selection */ static void change_level( struct net_device *dev ) { struct net_local *nl = netdev_priv(dev); if( nl->delta_rxl == 0 ) /* do not auto-negotiate RxL */ return; if( nl->cur_rxl_index == 0 ) nl->delta_rxl = 1; else if( nl->cur_rxl_index == 15 ) nl->delta_rxl = -1; else if( nl->cur_rxl_rcvd < nl->prev_rxl_rcvd ) nl->delta_rxl = -nl->delta_rxl; nl->csr1.rxl = rxl_tab[ nl->cur_rxl_index += nl->delta_rxl ]; inb( dev->base_addr + CSR0 ); /* needs for PCI cards */ outb( *(u8 *)&nl->csr1, dev->base_addr + CSR1 ); nl->prev_rxl_rcvd = nl->cur_rxl_rcvd; nl->cur_rxl_rcvd = 0; } static void timeout_change_level( struct net_device *dev ) { struct net_local *nl = netdev_priv(dev); nl->cur_rxl_index = timeout_rxl_tab[ nl->timeout_rxl ]; if( ++nl->timeout_rxl >= 4 ) nl->timeout_rxl = 0; nl->csr1.rxl = rxl_tab[ nl->cur_rxl_index ]; inb( dev->base_addr + CSR0 ); outb( *(unsigned char *)&nl->csr1, dev->base_addr + CSR1 ); nl->prev_rxl_rcvd = nl->cur_rxl_rcvd; nl->cur_rxl_rcvd = 0; } /* -------------------------------------------------------------------------- */ /* * Open/initialize the board. */ static int sbni_open( struct net_device *dev ) { struct net_local *nl = netdev_priv(dev); struct timer_list *w = &nl->watchdog; /* * For double ISA adapters within "common irq" mode, we have to * determine whether primary or secondary channel is initialized, * and set the irq handler only in first case. */ if( dev->base_addr < 0x400 ) { /* ISA only */ struct net_device **p = sbni_cards; for( ; *p && p < sbni_cards + SBNI_MAX_NUM_CARDS; ++p ) if( (*p)->irq == dev->irq && ((*p)->base_addr == dev->base_addr + 4 || (*p)->base_addr == dev->base_addr - 4) && (*p)->flags & IFF_UP ) { ((struct net_local *) (netdev_priv(*p))) ->second = dev; netdev_notice(dev, "using shared irq with %s\n", (*p)->name); nl->state |= FL_SECONDARY; goto handler_attached; } } if( request_irq(dev->irq, sbni_interrupt, IRQF_SHARED, dev->name, dev) ) { netdev_err(dev, "unable to get IRQ %d\n", dev->irq); return -EAGAIN; } handler_attached: spin_lock( &nl->lock ); memset( &dev->stats, 0, sizeof(struct net_device_stats) ); memset( &nl->in_stats, 0, sizeof(struct sbni_in_stats) ); card_start( dev ); netif_start_queue( dev ); /* set timer watchdog */ nl->watchdog_dev = dev; timer_setup(w, sbni_watchdog, 0); w->expires = jiffies + SBNI_TIMEOUT; add_timer( w ); spin_unlock( &nl->lock ); return 0; } static int sbni_close( struct net_device *dev ) { struct net_local *nl = netdev_priv(dev); if( nl->second && nl->second->flags & IFF_UP ) { netdev_notice(dev, "Secondary channel (%s) is active!\n", nl->second->name); return -EBUSY; } #ifdef CONFIG_SBNI_MULTILINE if( nl->state & FL_SLAVE ) emancipate( dev ); else while( nl->link ) /* it's master device! */ emancipate( nl->link ); #endif spin_lock( &nl->lock ); nl->second = NULL; drop_xmit_queue( dev ); netif_stop_queue( dev ); del_timer( &nl->watchdog ); outb( 0, dev->base_addr + CSR0 ); if( !(nl->state & FL_SECONDARY) ) free_irq( dev->irq, dev ); nl->state &= FL_SECONDARY; spin_unlock( &nl->lock ); return 0; } /* Valid combinations in CSR0 (for probing): VALID_DECODER 0000,0011,1011,1010 ; 0 ; - TR_REQ ; 1 ; + TR_RDY ; 2 ; - TR_RDY TR_REQ ; 3 ; + BU_EMP ; 4 ; + BU_EMP TR_REQ ; 5 ; + BU_EMP TR_RDY ; 6 ; - BU_EMP TR_RDY TR_REQ ; 7 ; + RC_RDY ; 8 ; + RC_RDY TR_REQ ; 9 ; + RC_RDY TR_RDY ; 10 ; - RC_RDY TR_RDY TR_REQ ; 11 ; - RC_RDY BU_EMP ; 12 ; - RC_RDY BU_EMP TR_REQ ; 13 ; - RC_RDY BU_EMP TR_RDY ; 14 ; - RC_RDY BU_EMP TR_RDY TR_REQ ; 15 ; - */ #define VALID_DECODER (2 + 8 + 0x10 + 0x20 + 0x80 + 0x100 + 0x200) static int sbni_card_probe( unsigned long ioaddr ) { unsigned char csr0; csr0 = inb( ioaddr + CSR0 ); if( csr0 != 0xff && csr0 != 0x00 ) { csr0 &= ~EN_INT; if( csr0 & BU_EMP ) csr0 |= EN_INT; if( VALID_DECODER & (1 << (csr0 >> 4)) ) return 0; } return -ENODEV; } /* -------------------------------------------------------------------------- */ static int sbni_siocdevprivate(struct net_device *dev, struct ifreq *ifr, void __user *data, int cmd) { struct net_local *nl = netdev_priv(dev); struct sbni_flags flags; int error = 0; #ifdef CONFIG_SBNI_MULTILINE struct net_device *slave_dev; char slave_name[ 8 ]; #endif switch( cmd ) { case SIOCDEVGETINSTATS : if (copy_to_user(data, &nl->in_stats, sizeof(struct sbni_in_stats))) error = -EFAULT; break; case SIOCDEVRESINSTATS : if (!capable(CAP_NET_ADMIN)) return -EPERM; memset( &nl->in_stats, 0, sizeof(struct sbni_in_stats) ); break; case SIOCDEVGHWSTATE : flags.mac_addr = *(u32 *)(dev->dev_addr + 3); flags.rate = nl->csr1.rate; flags.slow_mode = (nl->state & FL_SLOW_MODE) != 0; flags.rxl = nl->cur_rxl_index; flags.fixed_rxl = nl->delta_rxl == 0; if (copy_to_user(data, &flags, sizeof(flags))) error = -EFAULT; break; case SIOCDEVSHWSTATE : if (!capable(CAP_NET_ADMIN)) return -EPERM; spin_lock( &nl->lock ); flags = *(struct sbni_flags*) &ifr->ifr_ifru; if( flags.fixed_rxl ) { nl->delta_rxl = 0; nl->cur_rxl_index = flags.rxl; } else { nl->delta_rxl = DEF_RXL_DELTA; nl->cur_rxl_index = DEF_RXL; } nl->csr1.rxl = rxl_tab[ nl->cur_rxl_index ]; nl->csr1.rate = flags.rate; outb( *(u8 *)&nl->csr1 | PR_RES, dev->base_addr + CSR1 ); spin_unlock( &nl->lock ); break; #ifdef CONFIG_SBNI_MULTILINE case SIOCDEVENSLAVE : if (!capable(CAP_NET_ADMIN)) return -EPERM; if (copy_from_user(slave_name, data, sizeof(slave_name))) return -EFAULT; slave_dev = dev_get_by_name(&init_net, slave_name ); if( !slave_dev || !(slave_dev->flags & IFF_UP) ) { netdev_err(dev, "trying to enslave non-active device %s\n", slave_name); if (slave_dev) dev_put(slave_dev); return -EPERM; } return enslave( dev, slave_dev ); case SIOCDEVEMANSIPATE : if (!capable(CAP_NET_ADMIN)) return -EPERM; return emancipate( dev ); #endif /* CONFIG_SBNI_MULTILINE */ default : return -EOPNOTSUPP; } return error; } #ifdef CONFIG_SBNI_MULTILINE static int enslave( struct net_device *dev, struct net_device *slave_dev ) { struct net_local *nl = netdev_priv(dev); struct net_local *snl = netdev_priv(slave_dev); if( nl->state & FL_SLAVE ) /* This isn't master or free device */ return -EBUSY; if( snl->state & FL_SLAVE ) /* That was already enslaved */ return -EBUSY; spin_lock( &nl->lock ); spin_lock( &snl->lock ); /* append to list */ snl->link = nl->link; nl->link = slave_dev; snl->master = dev; snl->state |= FL_SLAVE; /* Summary statistics of MultiLine operation will be stored in master's counters */ memset( &slave_dev->stats, 0, sizeof(struct net_device_stats) ); netif_stop_queue( slave_dev ); netif_wake_queue( dev ); /* Now we are able to transmit */ spin_unlock( &snl->lock ); spin_unlock( &nl->lock ); netdev_notice(dev, "slave device (%s) attached\n", slave_dev->name); return 0; } static int emancipate( struct net_device *dev ) { struct net_local *snl = netdev_priv(dev); struct net_device *p = snl->master; struct net_local *nl = netdev_priv(p); if( !(snl->state & FL_SLAVE) ) return -EINVAL; spin_lock( &nl->lock ); spin_lock( &snl->lock ); drop_xmit_queue( dev ); /* exclude from list */ for(;;) { /* must be in list */ struct net_local *t = netdev_priv(p); if( t->link == dev ) { t->link = snl->link; break; } p = t->link; } snl->link = NULL; snl->master = dev; snl->state &= ~FL_SLAVE; netif_start_queue( dev ); spin_unlock( &snl->lock ); spin_unlock( &nl->lock ); dev_put( dev ); return 0; } #endif static void set_multicast_list( struct net_device *dev ) { return; /* sbni always operate in promiscuos mode */ } #ifdef MODULE module_param_hw_array(io, int, ioport, NULL, 0); module_param_hw_array(irq, int, irq, NULL, 0); module_param_array(baud, int, NULL, 0); module_param_array(rxl, int, NULL, 0); module_param_array(mac, int, NULL, 0); module_param(skip_pci_probe, bool, 0); MODULE_LICENSE("GPL"); int __init init_module( void ) { struct net_device *dev; int err; while( num < SBNI_MAX_NUM_CARDS ) { dev = alloc_netdev(sizeof(struct net_local), "sbni%d", NET_NAME_UNKNOWN, sbni_devsetup); if( !dev) break; sprintf( dev->name, "sbni%d", num ); err = sbni_init(dev); if (err) { free_netdev(dev); break; } if( register_netdev( dev ) ) { release_region( dev->base_addr, SBNI_IO_EXTENT ); free_netdev( dev ); break; } } return *sbni_cards ? 0 : -ENODEV; } void cleanup_module(void) { int i; for (i = 0; i < SBNI_MAX_NUM_CARDS; ++i) { struct net_device *dev = sbni_cards[i]; if (dev != NULL) { unregister_netdev(dev); release_region(dev->base_addr, SBNI_IO_EXTENT); free_netdev(dev); } } } #else /* MODULE */ static int __init sbni_setup( char *p ) { int n, parm; if( *p++ != '(' ) goto bad_param; for( n = 0, parm = 0; *p && n < 8; ) { (*dest[ parm ])[ n ] = simple_strtoul( p, &p, 0 ); if( !*p || *p == ')' ) return 1; if( *p == ';' ) { ++p; ++n; parm = 0; } else if( *p++ != ',' ) { break; } else { if( ++parm >= 5 ) break; } } bad_param: pr_err("Error in sbni kernel parameter!\n"); return 0; } __setup( "sbni=", sbni_setup ); #endif /* MODULE */ /* -------------------------------------------------------------------------- */ static u32 calc_crc32( u32 crc, u8 *p, u32 len ) { while( len-- ) crc = CRC32( *p++, crc ); return crc; } static u32 crc32tab[] __attribute__ ((aligned(8))) = { 0xD202EF8D, 0xA505DF1B, 0x3C0C8EA1, 0x4B0BBE37, 0xD56F2B94, 0xA2681B02, 0x3B614AB8, 0x4C667A2E, 0xDCD967BF, 0xABDE5729, 0x32D70693, 0x45D03605, 0xDBB4A3A6, 0xACB39330, 0x35BAC28A, 0x42BDF21C, 0xCFB5FFE9, 0xB8B2CF7F, 0x21BB9EC5, 0x56BCAE53, 0xC8D83BF0, 0xBFDF0B66, 0x26D65ADC, 0x51D16A4A, 0xC16E77DB, 0xB669474D, 0x2F6016F7, 0x58672661, 0xC603B3C2, 0xB1048354, 0x280DD2EE, 0x5F0AE278, 0xE96CCF45, 0x9E6BFFD3, 0x0762AE69, 0x70659EFF, 0xEE010B5C, 0x99063BCA, 0x000F6A70, 0x77085AE6, 0xE7B74777, 0x90B077E1, 0x09B9265B, 0x7EBE16CD, 0xE0DA836E, 0x97DDB3F8, 0x0ED4E242, 0x79D3D2D4, 0xF4DBDF21, 0x83DCEFB7, 0x1AD5BE0D, 0x6DD28E9B, 0xF3B61B38, 0x84B12BAE, 0x1DB87A14, 0x6ABF4A82, 0xFA005713, 0x8D076785, 0x140E363F, 0x630906A9, 0xFD6D930A, 0x8A6AA39C, 0x1363F226, 0x6464C2B0, 0xA4DEAE1D, 0xD3D99E8B, 0x4AD0CF31, 0x3DD7FFA7, 0xA3B36A04, 0xD4B45A92, 0x4DBD0B28, 0x3ABA3BBE, 0xAA05262F, 0xDD0216B9, 0x440B4703, 0x330C7795, 0xAD68E236, 0xDA6FD2A0, 0x4366831A, 0x3461B38C, 0xB969BE79, 0xCE6E8EEF, 0x5767DF55, 0x2060EFC3, 0xBE047A60, 0xC9034AF6, 0x500A1B4C, 0x270D2BDA, 0xB7B2364B, 0xC0B506DD, 0x59BC5767, 0x2EBB67F1, 0xB0DFF252, 0xC7D8C2C4, 0x5ED1937E, 0x29D6A3E8, 0x9FB08ED5, 0xE8B7BE43, 0x71BEEFF9, 0x06B9DF6F, 0x98DD4ACC, 0xEFDA7A5A, 0x76D32BE0, 0x01D41B76, 0x916B06E7, 0xE66C3671, 0x7F6567CB, 0x0862575D, 0x9606C2FE, 0xE101F268, 0x7808A3D2, 0x0F0F9344, 0x82079EB1, 0xF500AE27, 0x6C09FF9D, 0x1B0ECF0B, 0x856A5AA8, 0xF26D6A3E, 0x6B643B84, 0x1C630B12, 0x8CDC1683, 0xFBDB2615, 0x62D277AF, 0x15D54739, 0x8BB1D29A, 0xFCB6E20C, 0x65BFB3B6, 0x12B88320, 0x3FBA6CAD, 0x48BD5C3B, 0xD1B40D81, 0xA6B33D17, 0x38D7A8B4, 0x4FD09822, 0xD6D9C998, 0xA1DEF90E, 0x3161E49F, 0x4666D409, 0xDF6F85B3, 0xA868B525, 0x360C2086, 0x410B1010, 0xD80241AA, 0xAF05713C, 0x220D7CC9, 0x550A4C5F, 0xCC031DE5, 0xBB042D73, 0x2560B8D0, 0x52678846, 0xCB6ED9FC, 0xBC69E96A, 0x2CD6F4FB, 0x5BD1C46D, 0xC2D895D7, 0xB5DFA541, 0x2BBB30E2, 0x5CBC0074, 0xC5B551CE, 0xB2B26158, 0x04D44C65, 0x73D37CF3, 0xEADA2D49, 0x9DDD1DDF, 0x03B9887C, 0x74BEB8EA, 0xEDB7E950, 0x9AB0D9C6, 0x0A0FC457, 0x7D08F4C1, 0xE401A57B, 0x930695ED, 0x0D62004E, 0x7A6530D8, 0xE36C6162, 0x946B51F4, 0x19635C01, 0x6E646C97, 0xF76D3D2D, 0x806A0DBB, 0x1E0E9818, 0x6909A88E, 0xF000F934, 0x8707C9A2, 0x17B8D433, 0x60BFE4A5, 0xF9B6B51F, 0x8EB18589, 0x10D5102A, 0x67D220BC, 0xFEDB7106, 0x89DC4190, 0x49662D3D, 0x3E611DAB, 0xA7684C11, 0xD06F7C87, 0x4E0BE924, 0x390CD9B2, 0xA0058808, 0xD702B89E, 0x47BDA50F, 0x30BA9599, 0xA9B3C423, 0xDEB4F4B5, 0x40D06116, 0x37D75180, 0xAEDE003A, 0xD9D930AC, 0x54D13D59, 0x23D60DCF, 0xBADF5C75, 0xCDD86CE3, 0x53BCF940, 0x24BBC9D6, 0xBDB2986C, 0xCAB5A8FA, 0x5A0AB56B, 0x2D0D85FD, 0xB404D447, 0xC303E4D1, 0x5D677172, 0x2A6041E4, 0xB369105E, 0xC46E20C8, 0x72080DF5, 0x050F3D63, 0x9C066CD9, 0xEB015C4F, 0x7565C9EC, 0x0262F97A, 0x9B6BA8C0, 0xEC6C9856, 0x7CD385C7, 0x0BD4B551, 0x92DDE4EB, 0xE5DAD47D, 0x7BBE41DE, 0x0CB97148, 0x95B020F2, 0xE2B71064, 0x6FBF1D91, 0x18B82D07, 0x81B17CBD, 0xF6B64C2B, 0x68D2D988, 0x1FD5E91E, 0x86DCB8A4, 0xF1DB8832, 0x616495A3, 0x1663A535, 0x8F6AF48F, 0xF86DC419, 0x660951BA, 0x110E612C, 0x88073096, 0xFF000000 };