1736 lines
43 KiB
C
1736 lines
43 KiB
C
/* sbni.c: Granch SBNI12 leased line adapters driver for linux
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*
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* Written 2001 by Denis I.Timofeev (timofeev@granch.ru)
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*
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* Previous versions were written by Yaroslav Polyakov,
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* Alexey Zverev and Max Khon.
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*
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* Driver supports SBNI12-02,-04,-05,-10,-11 cards, single and
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* double-channel, PCI and ISA modifications.
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* More info and useful utilities to work with SBNI12 cards you can find
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* at http://www.granch.com (English) or http://www.granch.ru (Russian)
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*
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* This software may be used and distributed according to the terms
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* of the GNU General Public License.
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*
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*
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* 5.0.1 Jun 22 2001
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* - Fixed bug in probe
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* 5.0.0 Jun 06 2001
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* - Driver was completely redesigned by Denis I.Timofeev,
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* - now PCI/Dual, ISA/Dual (with single interrupt line) models are
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* - supported
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* 3.3.0 Thu Feb 24 21:30:28 NOVT 2000
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* - PCI cards support
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* 3.2.0 Mon Dec 13 22:26:53 NOVT 1999
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* - Completely rebuilt all the packet storage system
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* - to work in Ethernet-like style.
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* 3.1.1 just fixed some bugs (5 aug 1999)
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* 3.1.0 added balancing feature (26 apr 1999)
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* 3.0.1 just fixed some bugs (14 apr 1999).
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* 3.0.0 Initial Revision, Yaroslav Polyakov (24 Feb 1999)
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* - added pre-calculation for CRC, fixed bug with "len-2" frames,
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* - removed outbound fragmentation (MTU=1000), written CRC-calculation
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* - on asm, added work with hard_headers and now we have our own cache
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* - for them, optionally supported word-interchange on some chipsets,
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*
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* Known problem: this driver wasn't tested on multiprocessor machine.
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/ptrace.h>
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#include <linux/fcntl.h>
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#include <linux/ioport.h>
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#include <linux/interrupt.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/pci.h>
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#include <linux/skbuff.h>
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#include <linux/timer.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <net/arp.h>
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#include <asm/io.h>
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#include <asm/types.h>
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#include <asm/byteorder.h>
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#include <asm/irq.h>
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#include <asm/uaccess.h>
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#include "sbni.h"
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/* device private data */
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struct net_local {
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struct net_device_stats stats;
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struct timer_list watchdog;
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spinlock_t lock;
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struct sk_buff *rx_buf_p; /* receive buffer ptr */
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struct sk_buff *tx_buf_p; /* transmit buffer ptr */
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unsigned int framelen; /* current frame length */
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unsigned int maxframe; /* maximum valid frame length */
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unsigned int state;
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unsigned int inppos, outpos; /* positions in rx/tx buffers */
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/* transmitting frame number - from frames qty to 1 */
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unsigned int tx_frameno;
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/* expected number of next receiving frame */
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unsigned int wait_frameno;
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/* count of failed attempts to frame send - 32 attempts do before
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error - while receiver tunes on opposite side of wire */
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unsigned int trans_errors;
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/* idle time; send pong when limit exceeded */
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unsigned int timer_ticks;
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/* fields used for receive level autoselection */
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int delta_rxl;
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unsigned int cur_rxl_index, timeout_rxl;
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unsigned long cur_rxl_rcvd, prev_rxl_rcvd;
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struct sbni_csr1 csr1; /* current value of CSR1 */
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struct sbni_in_stats in_stats; /* internal statistics */
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struct net_device *second; /* for ISA/dual cards */
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#ifdef CONFIG_SBNI_MULTILINE
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struct net_device *master;
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struct net_device *link;
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#endif
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};
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static int sbni_card_probe( unsigned long );
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static int sbni_pci_probe( struct net_device * );
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static struct net_device *sbni_probe1(struct net_device *, unsigned long, int);
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static int sbni_open( struct net_device * );
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static int sbni_close( struct net_device * );
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static int sbni_start_xmit( struct sk_buff *, struct net_device * );
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static int sbni_ioctl( struct net_device *, struct ifreq *, int );
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static struct net_device_stats *sbni_get_stats( struct net_device * );
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static void set_multicast_list( struct net_device * );
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static irqreturn_t sbni_interrupt( int, void *, struct pt_regs * );
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static void handle_channel( struct net_device * );
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static int recv_frame( struct net_device * );
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static void send_frame( struct net_device * );
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static int upload_data( struct net_device *,
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unsigned, unsigned, unsigned, u32 );
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static void download_data( struct net_device *, u32 * );
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static void sbni_watchdog( unsigned long );
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static void interpret_ack( struct net_device *, unsigned );
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static int append_frame_to_pkt( struct net_device *, unsigned, u32 );
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static void indicate_pkt( struct net_device * );
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static void card_start( struct net_device * );
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static void prepare_to_send( struct sk_buff *, struct net_device * );
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static void drop_xmit_queue( struct net_device * );
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static void send_frame_header( struct net_device *, u32 * );
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static int skip_tail( unsigned int, unsigned int, u32 );
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static int check_fhdr( u32, u32 *, u32 *, u32 *, u32 *, u32 * );
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static void change_level( struct net_device * );
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static void timeout_change_level( struct net_device * );
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static u32 calc_crc32( u32, u8 *, u32 );
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static struct sk_buff * get_rx_buf( struct net_device * );
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static int sbni_init( struct net_device * );
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#ifdef CONFIG_SBNI_MULTILINE
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static int enslave( struct net_device *, struct net_device * );
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static int emancipate( struct net_device * );
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#endif
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#ifdef __i386__
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#define ASM_CRC 1
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#endif
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static const char version[] =
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"Granch SBNI12 driver ver 5.0.1 Jun 22 2001 Denis I.Timofeev.\n";
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static int skip_pci_probe __initdata = 0;
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static int scandone __initdata = 0;
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static int num __initdata = 0;
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static unsigned char rxl_tab[];
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static u32 crc32tab[];
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/* A list of all installed devices, for removing the driver module. */
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static struct net_device *sbni_cards[ SBNI_MAX_NUM_CARDS ];
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/* Lists of device's parameters */
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static u32 io[ SBNI_MAX_NUM_CARDS ] __initdata =
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{ [0 ... SBNI_MAX_NUM_CARDS-1] = -1 };
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static u32 irq[ SBNI_MAX_NUM_CARDS ] __initdata;
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static u32 baud[ SBNI_MAX_NUM_CARDS ] __initdata;
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static u32 rxl[ SBNI_MAX_NUM_CARDS ] __initdata =
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{ [0 ... SBNI_MAX_NUM_CARDS-1] = -1 };
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static u32 mac[ SBNI_MAX_NUM_CARDS ] __initdata;
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#ifndef MODULE
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typedef u32 iarr[];
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static iarr __initdata *dest[5] = { &io, &irq, &baud, &rxl, &mac };
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#endif
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/* A zero-terminated list of I/O addresses to be probed on ISA bus */
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static unsigned int netcard_portlist[ ] __initdata = {
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0x210, 0x214, 0x220, 0x224, 0x230, 0x234, 0x240, 0x244, 0x250, 0x254,
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0x260, 0x264, 0x270, 0x274, 0x280, 0x284, 0x290, 0x294, 0x2a0, 0x2a4,
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0x2b0, 0x2b4, 0x2c0, 0x2c4, 0x2d0, 0x2d4, 0x2e0, 0x2e4, 0x2f0, 0x2f4,
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0 };
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/*
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* Look for SBNI card which addr stored in dev->base_addr, if nonzero.
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* Otherwise, look through PCI bus. If none PCI-card was found, scan ISA.
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*/
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static inline int __init
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sbni_isa_probe( struct net_device *dev )
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{
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if( dev->base_addr > 0x1ff
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&& request_region( dev->base_addr, SBNI_IO_EXTENT, dev->name )
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&& sbni_probe1( dev, dev->base_addr, dev->irq ) )
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return 0;
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else {
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printk( KERN_ERR "sbni: base address 0x%lx is busy, or adapter "
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"is malfunctional!\n", dev->base_addr );
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return -ENODEV;
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}
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}
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static void __init sbni_devsetup(struct net_device *dev)
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{
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ether_setup( dev );
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dev->open = &sbni_open;
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dev->stop = &sbni_close;
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dev->hard_start_xmit = &sbni_start_xmit;
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dev->get_stats = &sbni_get_stats;
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dev->set_multicast_list = &set_multicast_list;
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dev->do_ioctl = &sbni_ioctl;
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SET_MODULE_OWNER( dev );
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}
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int __init sbni_probe(int unit)
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{
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struct net_device *dev;
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static unsigned version_printed __initdata = 0;
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int err;
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dev = alloc_netdev(sizeof(struct net_local), "sbni", sbni_devsetup);
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if (!dev)
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return -ENOMEM;
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sprintf(dev->name, "sbni%d", unit);
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netdev_boot_setup_check(dev);
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err = sbni_init(dev);
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if (err) {
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free_netdev(dev);
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return err;
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}
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err = register_netdev(dev);
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if (err) {
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release_region( dev->base_addr, SBNI_IO_EXTENT );
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free_netdev(dev);
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return err;
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}
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if( version_printed++ == 0 )
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printk( KERN_INFO "%s", version );
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return 0;
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}
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static int __init sbni_init(struct net_device *dev)
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{
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int i;
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if( dev->base_addr )
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return sbni_isa_probe( dev );
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/* otherwise we have to perform search our adapter */
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if( io[ num ] != -1 )
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dev->base_addr = io[ num ],
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dev->irq = irq[ num ];
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else if( scandone || io[ 0 ] != -1 )
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return -ENODEV;
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/* if io[ num ] contains non-zero address, then that is on ISA bus */
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if( dev->base_addr )
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return sbni_isa_probe( dev );
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/* ...otherwise - scan PCI first */
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if( !skip_pci_probe && !sbni_pci_probe( dev ) )
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return 0;
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if( io[ num ] == -1 ) {
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/* Auto-scan will be stopped when first ISA card were found */
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scandone = 1;
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if( num > 0 )
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return -ENODEV;
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}
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for( i = 0; netcard_portlist[ i ]; ++i ) {
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int ioaddr = netcard_portlist[ i ];
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if( request_region( ioaddr, SBNI_IO_EXTENT, dev->name )
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&& sbni_probe1( dev, ioaddr, 0 ))
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return 0;
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}
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return -ENODEV;
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}
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int __init
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sbni_pci_probe( struct net_device *dev )
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{
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struct pci_dev *pdev = NULL;
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while( (pdev = pci_get_class( PCI_CLASS_NETWORK_OTHER << 8, pdev ))
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!= NULL ) {
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int pci_irq_line;
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unsigned long pci_ioaddr;
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u16 subsys;
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if( pdev->vendor != SBNI_PCI_VENDOR
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&& pdev->device != SBNI_PCI_DEVICE )
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continue;
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pci_ioaddr = pci_resource_start( pdev, 0 );
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pci_irq_line = pdev->irq;
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/* Avoid already found cards from previous calls */
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if( !request_region( pci_ioaddr, SBNI_IO_EXTENT, dev->name ) ) {
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pci_read_config_word( pdev, PCI_SUBSYSTEM_ID, &subsys );
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if (subsys != 2)
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continue;
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/* Dual adapter is present */
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if (!request_region(pci_ioaddr += 4, SBNI_IO_EXTENT,
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dev->name ) )
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continue;
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}
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if( pci_irq_line <= 0 || pci_irq_line >= NR_IRQS )
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printk( KERN_WARNING " WARNING: The PCI BIOS assigned "
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"this PCI card to IRQ %d, which is unlikely "
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"to work!.\n"
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KERN_WARNING " You should use the PCI BIOS "
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"setup to assign a valid IRQ line.\n",
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pci_irq_line );
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/* avoiding re-enable dual adapters */
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if( (pci_ioaddr & 7) == 0 && pci_enable_device( pdev ) ) {
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release_region( pci_ioaddr, SBNI_IO_EXTENT );
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pci_dev_put( pdev );
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return -EIO;
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}
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if( sbni_probe1( dev, pci_ioaddr, pci_irq_line ) ) {
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SET_NETDEV_DEV(dev, &pdev->dev);
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/* not the best thing to do, but this is all messed up
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for hotplug systems anyway... */
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pci_dev_put( pdev );
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return 0;
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}
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}
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return -ENODEV;
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}
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static struct net_device * __init
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sbni_probe1( struct net_device *dev, unsigned long ioaddr, int irq )
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{
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struct net_local *nl;
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if( sbni_card_probe( ioaddr ) ) {
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release_region( ioaddr, SBNI_IO_EXTENT );
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return NULL;
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}
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outb( 0, ioaddr + CSR0 );
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if( irq < 2 ) {
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unsigned long irq_mask;
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irq_mask = probe_irq_on();
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outb( EN_INT | TR_REQ, ioaddr + CSR0 );
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outb( PR_RES, ioaddr + CSR1 );
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mdelay(50);
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irq = probe_irq_off(irq_mask);
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outb( 0, ioaddr + CSR0 );
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if( !irq ) {
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printk( KERN_ERR "%s: can't detect device irq!\n",
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dev->name );
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release_region( ioaddr, SBNI_IO_EXTENT );
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return NULL;
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}
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} else if( irq == 2 )
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irq = 9;
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dev->irq = irq;
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dev->base_addr = ioaddr;
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/* Allocate dev->priv and fill in sbni-specific dev fields. */
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nl = dev->priv;
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if( !nl ) {
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printk( KERN_ERR "%s: unable to get memory!\n", dev->name );
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release_region( ioaddr, SBNI_IO_EXTENT );
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return NULL;
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}
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dev->priv = nl;
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memset( nl, 0, sizeof(struct net_local) );
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spin_lock_init( &nl->lock );
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/* store MAC address (generate if that isn't known) */
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*(u16 *)dev->dev_addr = htons( 0x00ff );
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*(u32 *)(dev->dev_addr + 2) = htonl( 0x01000000 |
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( (mac[num] ? mac[num] : (u32)((long)dev->priv)) & 0x00ffffff) );
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/* store link settings (speed, receive level ) */
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nl->maxframe = DEFAULT_FRAME_LEN;
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nl->csr1.rate = baud[ num ];
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if( (nl->cur_rxl_index = rxl[ num ]) == -1 )
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/* autotune rxl */
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nl->cur_rxl_index = DEF_RXL,
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nl->delta_rxl = DEF_RXL_DELTA;
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else
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nl->delta_rxl = 0;
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nl->csr1.rxl = rxl_tab[ nl->cur_rxl_index ];
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if( inb( ioaddr + CSR0 ) & 0x01 )
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nl->state |= FL_SLOW_MODE;
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printk( KERN_NOTICE "%s: ioaddr %#lx, irq %d, "
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"MAC: 00:ff:01:%02x:%02x:%02x\n",
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dev->name, dev->base_addr, dev->irq,
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((u8 *) dev->dev_addr) [3],
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((u8 *) dev->dev_addr) [4],
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((u8 *) dev->dev_addr) [5] );
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printk( KERN_NOTICE "%s: speed %d, receive level ", dev->name,
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( (nl->state & FL_SLOW_MODE) ? 500000 : 2000000)
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/ (1 << nl->csr1.rate) );
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if( nl->delta_rxl == 0 )
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printk( "0x%x (fixed)\n", nl->cur_rxl_index );
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else
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printk( "(auto)\n");
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#ifdef CONFIG_SBNI_MULTILINE
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nl->master = dev;
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nl->link = NULL;
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#endif
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sbni_cards[ num++ ] = dev;
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return dev;
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}
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/* -------------------------------------------------------------------------- */
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#ifdef CONFIG_SBNI_MULTILINE
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static int
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sbni_start_xmit( struct sk_buff *skb, struct net_device *dev )
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{
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struct net_device *p;
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netif_stop_queue( dev );
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/* Looking for idle device in the list */
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for( p = dev; p; ) {
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struct net_local *nl = (struct net_local *) p->priv;
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spin_lock( &nl->lock );
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if( nl->tx_buf_p || (nl->state & FL_LINE_DOWN) ) {
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p = nl->link;
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spin_unlock( &nl->lock );
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} else {
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/* Idle dev is found */
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prepare_to_send( skb, p );
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spin_unlock( &nl->lock );
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netif_start_queue( dev );
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return 0;
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}
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}
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return 1;
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}
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#else /* CONFIG_SBNI_MULTILINE */
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static int
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sbni_start_xmit( struct sk_buff *skb, struct net_device *dev )
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{
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struct net_local *nl = (struct net_local *) dev->priv;
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netif_stop_queue( dev );
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spin_lock( &nl->lock );
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prepare_to_send( skb, dev );
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spin_unlock( &nl->lock );
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return 0;
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}
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#endif /* CONFIG_SBNI_MULTILINE */
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/* -------------------------------------------------------------------------- */
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/* interrupt handler */
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/*
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|
* 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
|
|
};
|
|
|