Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/net/wan/sbni.c b/drivers/net/wan/sbni.c
new file mode 100644
index 0000000..db2c798
--- /dev/null
+++ b/drivers/net/wan/sbni.c
@@ -0,0 +1,1735 @@
+/* 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.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/ptrace.h>
+#include <linux/fcntl.h>
+#include <linux/ioport.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/pci.h>
+#include <linux/skbuff.h>
+#include <linux/timer.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+
+#include <net/arp.h>
+
+#include <asm/io.h>
+#include <asm/types.h>
+#include <asm/byteorder.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+
+#include "sbni.h"
+
+/* device private data */
+
+struct net_local {
+ struct net_device_stats stats;
+ struct timer_list watchdog;
+
+ 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 int sbni_start_xmit( struct sk_buff *, struct net_device * );
+static int sbni_ioctl( struct net_device *, struct ifreq *, int );
+static struct net_device_stats *sbni_get_stats( struct net_device * );
+static void set_multicast_list( struct net_device * );
+
+static irqreturn_t sbni_interrupt( int, void *, struct pt_regs * );
+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( unsigned long );
+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
+
+#ifdef __i386__
+#define ASM_CRC 1
+#endif
+
+static const char version[] =
+ "Granch SBNI12 driver ver 5.0.1 Jun 22 2001 Denis I.Timofeev.\n";
+
+static int skip_pci_probe __initdata = 0;
+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 __initdata *dest[5] = { &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 };
+
+
+/*
+ * 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 {
+ printk( KERN_ERR "sbni: base address 0x%lx is busy, or adapter "
+ "is malfunctional!\n", dev->base_addr );
+ return -ENODEV;
+ }
+}
+
+static void __init sbni_devsetup(struct net_device *dev)
+{
+ ether_setup( dev );
+ dev->open = &sbni_open;
+ dev->stop = &sbni_close;
+ dev->hard_start_xmit = &sbni_start_xmit;
+ dev->get_stats = &sbni_get_stats;
+ dev->set_multicast_list = &set_multicast_list;
+ dev->do_ioctl = &sbni_ioctl;
+
+ SET_MODULE_OWNER( dev );
+}
+
+int __init sbni_probe(int unit)
+{
+ struct net_device *dev;
+ static unsigned version_printed __initdata = 0;
+ int err;
+
+ dev = alloc_netdev(sizeof(struct net_local), "sbni", sbni_devsetup);
+ if (!dev)
+ return -ENOMEM;
+
+ 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;
+ }
+ if( version_printed++ == 0 )
+ printk( KERN_INFO "%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;
+}
+
+
+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;
+ u16 subsys;
+
+ 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 ) ) {
+ pci_read_config_word( pdev, PCI_SUBSYSTEM_ID, &subsys );
+
+ if (subsys != 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 )
+ printk( KERN_WARNING " WARNING: The PCI BIOS assigned "
+ "this PCI card to IRQ %d, which is unlikely "
+ "to work!.\n"
+ KERN_WARNING " 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 ) {
+ printk( KERN_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;
+
+ /* Allocate dev->priv and fill in sbni-specific dev fields. */
+ nl = dev->priv;
+ if( !nl ) {
+ printk( KERN_ERR "%s: unable to get memory!\n", dev->name );
+ release_region( ioaddr, SBNI_IO_EXTENT );
+ return NULL;
+ }
+
+ dev->priv = nl;
+ memset( nl, 0, sizeof(struct net_local) );
+ spin_lock_init( &nl->lock );
+
+ /* store MAC address (generate if that isn't known) */
+ *(u16 *)dev->dev_addr = htons( 0x00ff );
+ *(u32 *)(dev->dev_addr + 2) = htonl( 0x01000000 |
+ ( (mac[num] ? mac[num] : (u32)((long)dev->priv)) & 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;
+
+ printk( KERN_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] );
+
+ printk( KERN_NOTICE "%s: speed %d, receive level ", dev->name,
+ ( (nl->state & FL_SLOW_MODE) ? 500000 : 2000000)
+ / (1 << nl->csr1.rate) );
+
+ if( nl->delta_rxl == 0 )
+ printk( "0x%x (fixed)\n", nl->cur_rxl_index );
+ else
+ printk( "(auto)\n");
+
+#ifdef CONFIG_SBNI_MULTILINE
+ nl->master = dev;
+ nl->link = NULL;
+#endif
+
+ sbni_cards[ num++ ] = dev;
+ return dev;
+}
+
+/* -------------------------------------------------------------------------- */
+
+#ifdef CONFIG_SBNI_MULTILINE
+
+static int
+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 = (struct net_local *) p->priv;
+ 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 0;
+ }
+ }
+
+ return 1;
+}
+
+#else /* CONFIG_SBNI_MULTILINE */
+
+static int
+sbni_start_xmit( struct sk_buff *skb, struct net_device *dev )
+{
+ struct net_local *nl = (struct net_local *) dev->priv;
+
+ netif_stop_queue( dev );
+ spin_lock( &nl->lock );
+
+ prepare_to_send( skb, dev );
+
+ spin_unlock( &nl->lock );
+ return 0;
+}
+
+#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 pt_regs *regs )
+{
+ struct net_device *dev = (struct net_device *) dev_id;
+ struct net_local *nl = (struct net_local *) dev->priv;
+ int repeat;
+
+ spin_lock( &nl->lock );
+ if( nl->second )
+ spin_lock( &((struct net_local *) nl->second->priv)->lock );
+
+ 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( &((struct net_local *)nl->second->priv)->lock );
+ spin_unlock( &nl->lock );
+ return IRQ_HANDLED;
+}
+
+
+static void
+handle_channel( struct net_device *dev )
+{
+ struct net_local *nl = (struct net_local *) dev->priv;
+ 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( &((struct net_local *) nl->master->priv)->lock );
+#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) )
+ printk( KERN_ERR "%s: internal error!\n", dev->name );
+
+ /* 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( &((struct net_local *) nl->master->priv)->lock );
+#endif
+}
+
+
+/*
+ * Routine returns 1 if it need to acknoweledge received frame.
+ * Empty frame received without errors won't be acknoweledged.
+ */
+
+static int
+recv_frame( struct net_device *dev )
+{
+ struct net_local *nl = (struct net_local *) dev->priv;
+ unsigned long ioaddr = dev->base_addr;
+
+ u32 crc = CRC32_INITIAL;
+
+ unsigned framelen, frameno, ack;
+ unsigned is_first, frame_ok;
+
+ 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 );
+ } else
+ frame_ok = 0;
+
+ 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 = (struct net_local *) dev->priv;
+
+ 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 = (struct net_local *) dev->priv;
+ 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 = (struct net_local *) dev->priv;
+
+ 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
+ ((struct net_local *) nl->master->priv)
+ ->stats.rx_errors++,
+ ((struct net_local *) nl->master->priv)
+ ->stats.rx_missed_errors++;
+#else
+ nl->stats.rx_errors++,
+ nl->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
+ ((struct net_local *) nl->master->priv)->stats.rx_errors++,
+ ((struct net_local *) nl->master->priv)->stats.rx_crc_errors++;
+#else
+ nl->stats.rx_errors++,
+ nl->stats.rx_crc_errors++;
+#endif
+
+ return frame_ok;
+}
+
+
+static __inline void
+send_complete( struct net_local *nl )
+{
+#ifdef CONFIG_SBNI_MULTILINE
+ ((struct net_local *) nl->master->priv)->stats.tx_packets++;
+ ((struct net_local *) nl->master->priv)->stats.tx_bytes
+ += nl->tx_buf_p->len;
+#else
+ nl->stats.tx_packets++;
+ nl->stats.tx_bytes += nl->tx_buf_p->len;
+#endif
+ dev_kfree_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 = (struct net_local *) dev->priv;
+
+ 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( nl ),
+#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 = (struct net_local *) dev->priv;
+
+ 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 = (struct net_local *) dev->priv;
+
+ unsigned int len;
+
+ /* nl->tx_buf_p == NULL here! */
+ if( nl->tx_buf_p )
+ printk( KERN_ERR "%s: memory leak!\n", dev->name );
+
+ 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 = (len + nl->maxframe - 1) / 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
+ nl->master->trans_start = jiffies;
+#else
+ dev->trans_start = jiffies;
+#endif
+}
+
+
+static void
+drop_xmit_queue( struct net_device *dev )
+{
+ struct net_local *nl = (struct net_local *) dev->priv;
+
+ if( nl->tx_buf_p )
+ dev_kfree_skb_any( nl->tx_buf_p ),
+ nl->tx_buf_p = NULL,
+#ifdef CONFIG_SBNI_MULTILINE
+ ((struct net_local *) nl->master->priv)
+ ->stats.tx_errors++,
+ ((struct net_local *) nl->master->priv)
+ ->stats.tx_carrier_errors++;
+#else
+ nl->stats.tx_errors++,
+ nl->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 );
+ nl->master->trans_start = jiffies;
+#else
+ netif_start_queue( dev );
+ dev->trans_start = jiffies;
+#endif
+}
+
+
+static void
+send_frame_header( struct net_device *dev, u32 *crc_p )
+{
+ struct net_local *nl = (struct net_local *) dev->priv;
+
+ 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;
+
+#ifdef CONFIG_SBNI_MULTILINE
+ skb->dev = ((struct net_local *) dev->priv)->master;
+#else
+ skb->dev = dev;
+#endif
+ skb_reserve( skb, 2 ); /* Align IP on longword boundaries */
+ return skb;
+}
+
+
+static void
+indicate_pkt( struct net_device *dev )
+{
+ struct net_local *nl = (struct net_local *) dev->priv;
+ 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 );
+ dev->last_rx = jiffies;
+ ++((struct net_local *) nl->master->priv)->stats.rx_packets;
+ ((struct net_local *) nl->master->priv)->stats.rx_bytes += nl->inppos;
+#else
+ skb->protocol = eth_type_trans( skb, dev );
+ netif_rx( skb );
+ dev->last_rx = jiffies;
+ ++nl->stats.rx_packets;
+ nl->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( unsigned long arg )
+{
+ struct net_device *dev = (struct net_device *) arg;
+ struct net_local *nl = (struct net_local *) dev->priv;
+ struct timer_list *w = &nl->watchdog;
+ 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 );
+
+ init_timer( w );
+ w->expires = jiffies + SBNI_TIMEOUT;
+ w->data = arg;
+ w->function = sbni_watchdog;
+ add_timer( w );
+
+ 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 = (struct net_local *) dev->priv;
+
+ 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 = (struct net_local *) dev->priv;
+
+ 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 = (struct net_local *) dev->priv;
+
+ 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 = (struct net_local *) dev->priv;
+ 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 *) ((*p)->priv))
+ ->second = dev;
+ printk( KERN_NOTICE "%s: using shared irq "
+ "with %s\n", dev->name, (*p)->name );
+ nl->state |= FL_SECONDARY;
+ goto handler_attached;
+ }
+ }
+
+ if( request_irq(dev->irq, sbni_interrupt, SA_SHIRQ, dev->name, dev) ) {
+ printk( KERN_ERR "%s: unable to get IRQ %d.\n",
+ dev->name, dev->irq );
+ return -EAGAIN;
+ }
+
+handler_attached:
+
+ spin_lock( &nl->lock );
+ memset( &nl->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 */
+ init_timer( w );
+ w->expires = jiffies + SBNI_TIMEOUT;
+ w->data = (unsigned long) dev;
+ w->function = sbni_watchdog;
+ add_timer( w );
+
+ spin_unlock( &nl->lock );
+ return 0;
+}
+
+
+static int
+sbni_close( struct net_device *dev )
+{
+ struct net_local *nl = (struct net_local *) dev->priv;
+
+ if( nl->second && nl->second->flags & IFF_UP ) {
+ printk( KERN_NOTICE "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_ioctl( struct net_device *dev, struct ifreq *ifr, int cmd )
+{
+ struct net_local *nl = (struct net_local *) dev->priv;
+ 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( ifr->ifr_data, &nl->in_stats,
+ sizeof(struct sbni_in_stats) ))
+ error = -EFAULT;
+ break;
+
+ case SIOCDEVRESINSTATS :
+ if( current->euid != 0 ) /* root only */
+ 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( ifr->ifr_data, &flags, sizeof flags ))
+ error = -EFAULT;
+ break;
+
+ case SIOCDEVSHWSTATE :
+ if( current->euid != 0 ) /* root only */
+ 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( current->euid != 0 ) /* root only */
+ return -EPERM;
+
+ if (copy_from_user( slave_name, ifr->ifr_data, sizeof slave_name ))
+ return -EFAULT;
+ slave_dev = dev_get_by_name( slave_name );
+ if( !slave_dev || !(slave_dev->flags & IFF_UP) ) {
+ printk( KERN_ERR "%s: trying to enslave non-active "
+ "device %s\n", dev->name, slave_name );
+ return -EPERM;
+ }
+
+ return enslave( dev, slave_dev );
+
+ case SIOCDEVEMANSIPATE :
+ if( current->euid != 0 ) /* root only */
+ 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 = (struct net_local *) dev->priv;
+ struct net_local *snl = (struct net_local *) slave_dev->priv;
+
+ 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( &snl->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 );
+ printk( KERN_NOTICE "%s: slave device (%s) attached.\n",
+ dev->name, slave_dev->name );
+ return 0;
+}
+
+
+static int
+emancipate( struct net_device *dev )
+{
+ struct net_local *snl = (struct net_local *) dev->priv;
+ struct net_device *p = snl->master;
+ struct net_local *nl = (struct net_local *) p->priv;
+
+ 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 = (struct net_local *) p->priv;
+ 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 struct net_device_stats *
+sbni_get_stats( struct net_device *dev )
+{
+ return &((struct net_local *) dev->priv)->stats;
+}
+
+
+static void
+set_multicast_list( struct net_device *dev )
+{
+ return; /* sbni always operate in promiscuos mode */
+}
+
+
+#ifdef MODULE
+module_param_array(io, int, NULL, 0);
+module_param_array(irq, int, 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_module( void )
+{
+ struct net_device *dev;
+ int err;
+
+ while( num < SBNI_MAX_NUM_CARDS ) {
+ dev = alloc_netdev(sizeof(struct net_local),
+ "sbni%d", 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 )
+{
+ struct net_device *dev;
+ int num;
+
+ for( num = 0; num < SBNI_MAX_NUM_CARDS; ++num )
+ if( (dev = sbni_cards[ num ]) != 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_strtol( 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:
+ printk( KERN_ERR "Error in sbni kernel parameter!\n" );
+ return 0;
+}
+
+__setup( "sbni=", sbni_setup );
+
+#endif /* MODULE */
+
+/* -------------------------------------------------------------------------- */
+
+#ifdef ASM_CRC
+
+static u32
+calc_crc32( u32 crc, u8 *p, u32 len )
+{
+ register u32 _crc;
+ _crc = crc;
+
+ __asm__ __volatile__ (
+ "xorl %%ebx, %%ebx\n"
+ "movl %2, %%esi\n"
+ "movl %3, %%ecx\n"
+ "movl $crc32tab, %%edi\n"
+ "shrl $2, %%ecx\n"
+ "jz 1f\n"
+
+ ".align 4\n"
+ "0:\n"
+ "movb %%al, %%bl\n"
+ "movl (%%esi), %%edx\n"
+ "shrl $8, %%eax\n"
+ "xorb %%dl, %%bl\n"
+ "shrl $8, %%edx\n"
+ "xorl (%%edi,%%ebx,4), %%eax\n"
+
+ "movb %%al, %%bl\n"
+ "shrl $8, %%eax\n"
+ "xorb %%dl, %%bl\n"
+ "shrl $8, %%edx\n"
+ "xorl (%%edi,%%ebx,4), %%eax\n"
+
+ "movb %%al, %%bl\n"
+ "shrl $8, %%eax\n"
+ "xorb %%dl, %%bl\n"
+ "movb %%dh, %%dl\n"
+ "xorl (%%edi,%%ebx,4), %%eax\n"
+
+ "movb %%al, %%bl\n"
+ "shrl $8, %%eax\n"
+ "xorb %%dl, %%bl\n"
+ "addl $4, %%esi\n"
+ "xorl (%%edi,%%ebx,4), %%eax\n"
+
+ "decl %%ecx\n"
+ "jnz 0b\n"
+
+ "1:\n"
+ "movl %3, %%ecx\n"
+ "andl $3, %%ecx\n"
+ "jz 2f\n"
+
+ "movb %%al, %%bl\n"
+ "shrl $8, %%eax\n"
+ "xorb (%%esi), %%bl\n"
+ "xorl (%%edi,%%ebx,4), %%eax\n"
+
+ "decl %%ecx\n"
+ "jz 2f\n"
+
+ "movb %%al, %%bl\n"
+ "shrl $8, %%eax\n"
+ "xorb 1(%%esi), %%bl\n"
+ "xorl (%%edi,%%ebx,4), %%eax\n"
+
+ "decl %%ecx\n"
+ "jz 2f\n"
+
+ "movb %%al, %%bl\n"
+ "shrl $8, %%eax\n"
+ "xorb 2(%%esi), %%bl\n"
+ "xorl (%%edi,%%ebx,4), %%eax\n"
+ "2:\n"
+ : "=a" (_crc)
+ : "0" (_crc), "g" (p), "g" (len)
+ : "bx", "cx", "dx", "si", "di"
+ );
+
+ return _crc;
+}
+
+#else /* ASM_CRC */
+
+static u32
+calc_crc32( u32 crc, u8 *p, u32 len )
+{
+ while( len-- )
+ crc = CRC32( *p++, crc );
+
+ return crc;
+}
+
+#endif /* ASM_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
+};
+