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/sdlamain.c b/drivers/net/wan/sdlamain.c
new file mode 100644
index 0000000..74e151a
--- /dev/null
+++ b/drivers/net/wan/sdlamain.c
@@ -0,0 +1,1341 @@
+/****************************************************************************
+* sdlamain.c WANPIPE(tm) Multiprotocol WAN Link Driver. Main module.
+*
+* Author: Nenad Corbic <ncorbic@sangoma.com>
+* Gideon Hack
+*
+* Copyright: (c) 1995-2000 Sangoma Technologies Inc.
+*
+* This program is free software; you can redistribute it and/or
+* modify it under the terms of the GNU General Public License
+* as published by the Free Software Foundation; either version
+* 2 of the License, or (at your option) any later version.
+* ============================================================================
+* Dec 22, 2000 Nenad Corbic Updated for 2.4.X kernels.
+* Removed the polling routine.
+* Nov 13, 2000 Nenad Corbic Added hw probing on module load and dynamic
+* device allocation.
+* Nov 7, 2000 Nenad Corbic Fixed the Multi-Port PPP for kernels
+* 2.2.16 and above.
+* Aug 2, 2000 Nenad Corbic Block the Multi-Port PPP from running on
+* kernels 2.2.16 or greater. The SyncPPP
+* has changed.
+* Jul 25, 2000 Nenad Corbic Updated the Piggiback support for MultPPPP.
+* Jul 13, 2000 Nenad Corbic Added Multi-PPP support.
+* Feb 02, 2000 Nenad Corbic Fixed up piggyback probing and selection.
+* Sep 23, 1999 Nenad Corbic Added support for SMP
+* Sep 13, 1999 Nenad Corbic Each port is treated as a separate device.
+* Jun 02, 1999 Gideon Hack Added support for the S514 adapter.
+* Updates for Linux 2.2.X kernels.
+* Sep 17, 1998 Jaspreet Singh Updated for 2.1.121+ kernel
+* Nov 28, 1997 Jaspreet Singh Changed DRV_RELEASE to 1
+* Nov 10, 1997 Jaspreet Singh Changed sti() to restore_flags();
+* Nov 06, 1997 Jaspreet Singh Changed DRV_VERSION to 4 and DRV_RELEASE to 0
+* Oct 20, 1997 Jaspreet Singh Modified sdla_isr routine so that card->in_isr
+* assignments are taken out and placed in the
+* sdla_ppp.c, sdla_fr.c and sdla_x25.c isr
+* routines. Took out 'wandev->tx_int_enabled' and
+* replaced it with 'wandev->enable_tx_int'.
+* May 29, 1997 Jaspreet Singh Flow Control Problem
+* added "wandev->tx_int_enabled=1" line in the
+* init module. This line initializes the flag for
+* preventing Interrupt disabled with device set to
+* busy
+* Jan 15, 1997 Gene Kozin Version 3.1.0
+* o added UDP management stuff
+* Jan 02, 1997 Gene Kozin Initial version.
+*****************************************************************************/
+
+#include <linux/config.h> /* OS configuration options */
+#include <linux/stddef.h> /* offsetof(), etc. */
+#include <linux/errno.h> /* return codes */
+#include <linux/string.h> /* inline memset(), etc. */
+#include <linux/init.h>
+#include <linux/slab.h> /* kmalloc(), kfree() */
+#include <linux/kernel.h> /* printk(), and other useful stuff */
+#include <linux/module.h> /* support for loadable modules */
+#include <linux/ioport.h> /* request_region(), release_region() */
+#include <linux/wanrouter.h> /* WAN router definitions */
+#include <linux/wanpipe.h> /* WANPIPE common user API definitions */
+
+#include <linux/in.h>
+#include <asm/io.h> /* phys_to_virt() */
+#include <linux/pci.h>
+#include <linux/sdlapci.h>
+#include <linux/if_wanpipe_common.h>
+
+#include <asm/uaccess.h> /* kernel <-> user copy */
+#include <linux/inetdevice.h>
+
+#include <linux/ip.h>
+#include <net/route.h>
+
+#define KMEM_SAFETYZONE 8
+
+
+#ifndef CONFIG_WANPIPE_FR
+ #define wpf_init(a,b) (-EPROTONOSUPPORT)
+#endif
+
+#ifndef CONFIG_WANPIPE_CHDLC
+ #define wpc_init(a,b) (-EPROTONOSUPPORT)
+#endif
+
+#ifndef CONFIG_WANPIPE_X25
+ #define wpx_init(a,b) (-EPROTONOSUPPORT)
+#endif
+
+#ifndef CONFIG_WANPIPE_PPP
+ #define wpp_init(a,b) (-EPROTONOSUPPORT)
+#endif
+
+#ifndef CONFIG_WANPIPE_MULTPPP
+ #define wsppp_init(a,b) (-EPROTONOSUPPORT)
+#endif
+
+
+/***********FOR DEBUGGING PURPOSES*********************************************
+static void * dbg_kmalloc(unsigned int size, int prio, int line) {
+ int i = 0;
+ void * v = kmalloc(size+sizeof(unsigned int)+2*KMEM_SAFETYZONE*8,prio);
+ char * c1 = v;
+ c1 += sizeof(unsigned int);
+ *((unsigned int *)v) = size;
+
+ for (i = 0; i < KMEM_SAFETYZONE; i++) {
+ c1[0] = 'D'; c1[1] = 'E'; c1[2] = 'A'; c1[3] = 'D';
+ c1[4] = 'B'; c1[5] = 'E'; c1[6] = 'E'; c1[7] = 'F';
+ c1 += 8;
+ }
+ c1 += size;
+ for (i = 0; i < KMEM_SAFETYZONE; i++) {
+ c1[0] = 'M'; c1[1] = 'U'; c1[2] = 'N'; c1[3] = 'G';
+ c1[4] = 'W'; c1[5] = 'A'; c1[6] = 'L'; c1[7] = 'L';
+ c1 += 8;
+ }
+ v = ((char *)v) + sizeof(unsigned int) + KMEM_SAFETYZONE*8;
+ printk(KERN_INFO "line %d kmalloc(%d,%d) = %p\n",line,size,prio,v);
+ return v;
+}
+static void dbg_kfree(void * v, int line) {
+ unsigned int * sp = (unsigned int *)(((char *)v) - (sizeof(unsigned int) + KMEM_SAFETYZONE*8));
+ unsigned int size = *sp;
+ char * c1 = ((char *)v) - KMEM_SAFETYZONE*8;
+ int i = 0;
+ for (i = 0; i < KMEM_SAFETYZONE; i++) {
+ if ( c1[0] != 'D' || c1[1] != 'E' || c1[2] != 'A' || c1[3] != 'D'
+ || c1[4] != 'B' || c1[5] != 'E' || c1[6] != 'E' || c1[7] != 'F') {
+ printk(KERN_INFO "kmalloced block at %p has been corrupted (underrun)!\n",v);
+ printk(KERN_INFO " %4x: %2x %2x %2x %2x %2x %2x %2x %2x\n", i*8,
+ c1[0],c1[1],c1[2],c1[3],c1[4],c1[5],c1[6],c1[7] );
+ }
+ c1 += 8;
+ }
+ c1 += size;
+ for (i = 0; i < KMEM_SAFETYZONE; i++) {
+ if ( c1[0] != 'M' || c1[1] != 'U' || c1[2] != 'N' || c1[3] != 'G'
+ || c1[4] != 'W' || c1[5] != 'A' || c1[6] != 'L' || c1[7] != 'L'
+ ) {
+ printk(KERN_INFO "kmalloced block at %p has been corrupted (overrun):\n",v);
+ printk(KERN_INFO " %4x: %2x %2x %2x %2x %2x %2x %2x %2x\n", i*8,
+ c1[0],c1[1],c1[2],c1[3],c1[4],c1[5],c1[6],c1[7] );
+ }
+ c1 += 8;
+ }
+ printk(KERN_INFO "line %d kfree(%p)\n",line,v);
+ v = ((char *)v) - (sizeof(unsigned int) + KMEM_SAFETYZONE*8);
+ kfree(v);
+}
+
+#define kmalloc(x,y) dbg_kmalloc(x,y,__LINE__)
+#define kfree(x) dbg_kfree(x,__LINE__)
+******************************************************************************/
+
+
+
+/****** Defines & Macros ****************************************************/
+
+#ifdef _DEBUG_
+#define STATIC
+#else
+#define STATIC static
+#endif
+
+#define DRV_VERSION 5 /* version number */
+#define DRV_RELEASE 0 /* release (minor version) number */
+#define MAX_CARDS 16 /* max number of adapters */
+
+#ifndef CONFIG_WANPIPE_CARDS /* configurable option */
+#define CONFIG_WANPIPE_CARDS 1
+#endif
+
+#define CMD_OK 0 /* normal firmware return code */
+#define CMD_TIMEOUT 0xFF /* firmware command timed out */
+#define MAX_CMD_RETRY 10 /* max number of firmware retries */
+/****** Function Prototypes *************************************************/
+
+extern void disable_irq(unsigned int);
+extern void enable_irq(unsigned int);
+
+/* WAN link driver entry points */
+static int setup(struct wan_device* wandev, wandev_conf_t* conf);
+static int shutdown(struct wan_device* wandev);
+static int ioctl(struct wan_device* wandev, unsigned cmd, unsigned long arg);
+
+/* IOCTL handlers */
+static int ioctl_dump (sdla_t* card, sdla_dump_t* u_dump);
+static int ioctl_exec (sdla_t* card, sdla_exec_t* u_exec, int);
+
+/* Miscellaneous functions */
+STATIC irqreturn_t sdla_isr (int irq, void* dev_id, struct pt_regs *regs);
+static void release_hw (sdla_t *card);
+
+static int check_s508_conflicts (sdla_t* card,wandev_conf_t* conf, int*);
+static int check_s514_conflicts (sdla_t* card,wandev_conf_t* conf, int*);
+
+
+/****** Global Data **********************************************************
+ * Note: All data must be explicitly initialized!!!
+ */
+
+/* private data */
+static char drvname[] = "wanpipe";
+static char fullname[] = "WANPIPE(tm) Multiprotocol Driver";
+static char copyright[] = "(c) 1995-2000 Sangoma Technologies Inc.";
+static int ncards;
+static sdla_t* card_array; /* adapter data space */
+
+/* Wanpipe's own workqueue, used for all API's.
+ * All protocol specific tasks will be inserted
+ * into the "wanpipe_wq" workqueue.
+
+ * The kernel workqueue mechanism will execute
+ * all pending tasks in the "wanpipe_wq" workqueue.
+ */
+
+struct workqueue_struct *wanpipe_wq;
+DECLARE_WORK(wanpipe_work, NULL, NULL);
+
+static int wanpipe_bh_critical;
+
+/******* Kernel Loadable Module Entry Points ********************************/
+
+/*============================================================================
+ * Module 'insert' entry point.
+ * o print announcement
+ * o allocate adapter data space
+ * o initialize static data
+ * o register all cards with WAN router
+ * o calibrate SDLA shared memory access delay.
+ *
+ * Return: 0 Ok
+ * < 0 error.
+ * Context: process
+ */
+
+static int __init wanpipe_init(void)
+{
+ int cnt, err = 0;
+
+ printk(KERN_INFO "%s v%u.%u %s\n",
+ fullname, DRV_VERSION, DRV_RELEASE, copyright);
+
+ wanpipe_wq = create_workqueue("wanpipe_wq");
+ if (!wanpipe_wq)
+ return -ENOMEM;
+
+ /* Probe for wanpipe cards and return the number found */
+ printk(KERN_INFO "wanpipe: Probing for WANPIPE hardware.\n");
+ ncards = wanpipe_hw_probe();
+ if (ncards){
+ printk(KERN_INFO "wanpipe: Allocating maximum %i devices: wanpipe%i - wanpipe%i.\n",ncards,1,ncards);
+ }else{
+ printk(KERN_INFO "wanpipe: No S514/S508 cards found, unloading modules!\n");
+ destroy_workqueue(wanpipe_wq);
+ return -ENODEV;
+ }
+
+ /* Verify number of cards and allocate adapter data space */
+ card_array = kmalloc(sizeof(sdla_t) * ncards, GFP_KERNEL);
+ if (card_array == NULL) {
+ destroy_workqueue(wanpipe_wq);
+ return -ENOMEM;
+ }
+
+ memset(card_array, 0, sizeof(sdla_t) * ncards);
+
+ /* Register adapters with WAN router */
+ for (cnt = 0; cnt < ncards; ++ cnt) {
+ sdla_t* card = &card_array[cnt];
+ struct wan_device* wandev = &card->wandev;
+
+ card->next = NULL;
+ sprintf(card->devname, "%s%d", drvname, cnt + 1);
+ wandev->magic = ROUTER_MAGIC;
+ wandev->name = card->devname;
+ wandev->private = card;
+ wandev->enable_tx_int = 0;
+ wandev->setup = &setup;
+ wandev->shutdown = &shutdown;
+ wandev->ioctl = &ioctl;
+ err = register_wan_device(wandev);
+ if (err) {
+ printk(KERN_INFO
+ "%s: %s registration failed with error %d!\n",
+ drvname, card->devname, err);
+ break;
+ }
+ }
+ if (cnt){
+ ncards = cnt; /* adjust actual number of cards */
+ }else {
+ kfree(card_array);
+ destroy_workqueue(wanpipe_wq);
+ printk(KERN_INFO "IN Init Module: NO Cards registered\n");
+ err = -ENODEV;
+ }
+
+ return err;
+}
+
+/*============================================================================
+ * Module 'remove' entry point.
+ * o unregister all adapters from the WAN router
+ * o release all remaining system resources
+ */
+static void __exit wanpipe_cleanup(void)
+{
+ int i;
+
+ if (!ncards)
+ return;
+
+ for (i = 0; i < ncards; ++i) {
+ sdla_t* card = &card_array[i];
+ unregister_wan_device(card->devname);
+ }
+ destroy_workqueue(wanpipe_wq);
+ kfree(card_array);
+
+ printk(KERN_INFO "\nwanpipe: WANPIPE Modules Unloaded.\n");
+}
+
+module_init(wanpipe_init);
+module_exit(wanpipe_cleanup);
+
+/******* WAN Device Driver Entry Points *************************************/
+
+/*============================================================================
+ * Setup/configure WAN link driver.
+ * o check adapter state
+ * o make sure firmware is present in configuration
+ * o make sure I/O port and IRQ are specified
+ * o make sure I/O region is available
+ * o allocate interrupt vector
+ * o setup SDLA hardware
+ * o call appropriate routine to perform protocol-specific initialization
+ * o mark I/O region as used
+ * o if this is the first active card, then schedule background task
+ *
+ * This function is called when router handles ROUTER_SETUP IOCTL. The
+ * configuration structure is in kernel memory (including extended data, if
+ * any).
+ */
+
+static int setup(struct wan_device* wandev, wandev_conf_t* conf)
+{
+ sdla_t* card;
+ int err = 0;
+ int irq=0;
+
+ /* Sanity checks */
+ if ((wandev == NULL) || (wandev->private == NULL) || (conf == NULL)){
+ printk(KERN_INFO
+ "%s: Failed Sdlamain Setup wandev %u, card %u, conf %u !\n",
+ wandev->name,
+ (unsigned int)wandev,(unsigned int)wandev->private,
+ (unsigned int)conf);
+ return -EFAULT;
+ }
+
+ printk(KERN_INFO "%s: Starting WAN Setup\n", wandev->name);
+
+ card = wandev->private;
+ if (wandev->state != WAN_UNCONFIGURED){
+ printk(KERN_INFO "%s: failed sdlamain setup, busy!\n",
+ wandev->name);
+ return -EBUSY; /* already configured */
+ }
+
+ printk(KERN_INFO "\nProcessing WAN device %s...\n", wandev->name);
+
+ /* Initialize the counters for each wandev
+ * Used for counting number of times new_if and
+ * del_if get called.
+ */
+ wandev->del_if_cnt = 0;
+ wandev->new_if_cnt = 0;
+ wandev->config_id = conf->config_id;
+
+ if (!conf->data_size || (conf->data == NULL)) {
+ printk(KERN_INFO
+ "%s: firmware not found in configuration data!\n",
+ wandev->name);
+ return -EINVAL;
+ }
+
+ /* Check for resource conflicts and setup the
+ * card for piggibacking if necessary */
+ if(!conf->S514_CPU_no[0]) {
+ if ((err=check_s508_conflicts(card,conf,&irq)) != 0){
+ return err;
+ }
+ }else {
+ if ((err=check_s514_conflicts(card,conf,&irq)) != 0){
+ return err;
+ }
+ }
+
+ /* If the current card has already been configured
+ * or it's a piggyback card, do not try to allocate
+ * resources.
+ */
+ if (!card->wandev.piggyback && !card->configured){
+
+ /* Configure hardware, load firmware, etc. */
+ memset(&card->hw, 0, sizeof(sdlahw_t));
+
+ /* for an S514 adapter, pass the CPU number and the slot number read */
+ /* from 'router.conf' to the 'sdla_setup()' function via the 'port' */
+ /* parameter */
+ if (conf->S514_CPU_no[0]){
+
+ card->hw.S514_cpu_no[0] = conf->S514_CPU_no[0];
+ card->hw.S514_slot_no = conf->PCI_slot_no;
+ card->hw.auto_pci_cfg = conf->auto_pci_cfg;
+
+ if (card->hw.auto_pci_cfg == WANOPT_YES){
+ printk(KERN_INFO "%s: Setting CPU to %c and Slot to Auto\n",
+ card->devname, card->hw.S514_cpu_no[0]);
+ }else{
+ printk(KERN_INFO "%s: Setting CPU to %c and Slot to %i\n",
+ card->devname, card->hw.S514_cpu_no[0], card->hw.S514_slot_no);
+ }
+
+ }else{
+ /* 508 Card io port and irq initialization */
+ card->hw.port = conf->ioport;
+ card->hw.irq = (conf->irq == 9) ? 2 : conf->irq;
+ }
+
+
+ /* Compute the virtual address of the card in kernel space */
+ if(conf->maddr){
+ card->hw.dpmbase = phys_to_virt(conf->maddr);
+ }else{
+ card->hw.dpmbase = (void *)conf->maddr;
+ }
+
+ card->hw.dpmsize = SDLA_WINDOWSIZE;
+
+ /* set the adapter type if using an S514 adapter */
+ card->hw.type = (conf->S514_CPU_no[0]) ? SDLA_S514 : conf->hw_opt[0];
+ card->hw.pclk = conf->hw_opt[1];
+
+ err = sdla_setup(&card->hw, conf->data, conf->data_size);
+ if (err){
+ printk(KERN_INFO "%s: Hardware setup Failed %i\n",
+ card->devname,err);
+ return err;
+ }
+
+ if(card->hw.type != SDLA_S514)
+ irq = (conf->irq == 2) ? 9 : conf->irq; /* IRQ2 -> IRQ9 */
+ else
+ irq = card->hw.irq;
+
+ /* request an interrupt vector - note that interrupts may be shared */
+ /* when using the S514 PCI adapter */
+
+ if(request_irq(irq, sdla_isr,
+ (card->hw.type == SDLA_S514) ? SA_SHIRQ : 0,
+ wandev->name, card)){
+
+ printk(KERN_INFO "%s: Can't reserve IRQ %d!\n", wandev->name, irq);
+ return -EINVAL;
+ }
+
+ }else{
+ printk(KERN_INFO "%s: Card Configured %lu or Piggybacking %i!\n",
+ wandev->name,card->configured,card->wandev.piggyback);
+ }
+
+
+ if (!card->configured){
+
+ /* Initialize the Spin lock */
+ printk(KERN_INFO "%s: Initializing for SMP\n",wandev->name);
+
+ /* Piggyback spin lock has already been initialized,
+ * in check_s514/s508_conflicts() */
+ if (!card->wandev.piggyback){
+ spin_lock_init(&card->wandev.lock);
+ }
+
+ /* Intialize WAN device data space */
+ wandev->irq = irq;
+ wandev->dma = 0;
+ if(card->hw.type != SDLA_S514){
+ wandev->ioport = card->hw.port;
+ }else{
+ wandev->S514_cpu_no[0] = card->hw.S514_cpu_no[0];
+ wandev->S514_slot_no = card->hw.S514_slot_no;
+ }
+ wandev->maddr = (unsigned long)card->hw.dpmbase;
+ wandev->msize = card->hw.dpmsize;
+ wandev->hw_opt[0] = card->hw.type;
+ wandev->hw_opt[1] = card->hw.pclk;
+ wandev->hw_opt[2] = card->hw.memory;
+ wandev->hw_opt[3] = card->hw.fwid;
+ }
+
+ /* Protocol-specific initialization */
+ switch (card->hw.fwid) {
+
+ case SFID_X25_502:
+ case SFID_X25_508:
+ printk(KERN_INFO "%s: Starting X.25 Protocol Init.\n",
+ card->devname);
+ err = wpx_init(card, conf);
+ break;
+ case SFID_FR502:
+ case SFID_FR508:
+ printk(KERN_INFO "%s: Starting Frame Relay Protocol Init.\n",
+ card->devname);
+ err = wpf_init(card, conf);
+ break;
+ case SFID_PPP502:
+ case SFID_PPP508:
+ printk(KERN_INFO "%s: Starting PPP Protocol Init.\n",
+ card->devname);
+ err = wpp_init(card, conf);
+ break;
+
+ case SFID_CHDLC508:
+ case SFID_CHDLC514:
+ if (conf->ft1){
+ printk(KERN_INFO "%s: Starting FT1 CSU/DSU Config Driver.\n",
+ card->devname);
+ err = wpft1_init(card, conf);
+ break;
+
+ }else if (conf->config_id == WANCONFIG_MPPP){
+ printk(KERN_INFO "%s: Starting Multi-Port PPP Protocol Init.\n",
+ card->devname);
+ err = wsppp_init(card,conf);
+ break;
+
+ }else{
+ printk(KERN_INFO "%s: Starting CHDLC Protocol Init.\n",
+ card->devname);
+ err = wpc_init(card, conf);
+ break;
+ }
+ default:
+ printk(KERN_INFO "%s: Error, Firmware is not supported %X %X!\n",
+ wandev->name,card->hw.fwid,SFID_CHDLC508);
+ err = -EPROTONOSUPPORT;
+ }
+
+ if (err != 0){
+ if (err == -EPROTONOSUPPORT){
+ printk(KERN_INFO
+ "%s: Error, Protocol selected has not been compiled!\n",
+ card->devname);
+ printk(KERN_INFO
+ "%s: Re-configure the kernel and re-build the modules!\n",
+ card->devname);
+ }
+
+ release_hw(card);
+ wandev->state = WAN_UNCONFIGURED;
+ return err;
+ }
+
+
+ /* Reserve I/O region and schedule background task */
+ if(card->hw.type != SDLA_S514 && !card->wandev.piggyback)
+ if (!request_region(card->hw.port, card->hw.io_range,
+ wandev->name)) {
+ printk(KERN_WARNING "port 0x%04x busy\n", card->hw.port);
+ release_hw(card);
+ wandev->state = WAN_UNCONFIGURED;
+ return -EBUSY;
+ }
+
+ /* Only use the polling routine for the X25 protocol */
+
+ card->wandev.critical=0;
+ return 0;
+}
+
+/*==================================================================
+ * configure_s508_card
+ *
+ * For a S508 adapter, check for a possible configuration error in that
+ * we are loading an adapter in the same IO port as a previously loaded S508
+ * card.
+ */
+
+static int check_s508_conflicts (sdla_t* card,wandev_conf_t* conf, int *irq)
+{
+ unsigned long smp_flags;
+ int i;
+
+ if (conf->ioport <= 0) {
+ printk(KERN_INFO
+ "%s: can't configure without I/O port address!\n",
+ card->wandev.name);
+ return -EINVAL;
+ }
+
+ if (conf->irq <= 0) {
+ printk(KERN_INFO "%s: can't configure without IRQ!\n",
+ card->wandev.name);
+ return -EINVAL;
+ }
+
+ if (test_bit(0,&card->configured))
+ return 0;
+
+
+ /* Check for already loaded card with the same IO port and IRQ
+ * If found, copy its hardware configuration and use its
+ * resources (i.e. piggybacking)
+ */
+
+ for (i = 0; i < ncards; i++) {
+ sdla_t *nxt_card = &card_array[i];
+
+ /* Skip the current card ptr */
+ if (nxt_card == card)
+ continue;
+
+
+ /* Find a card that is already configured with the
+ * same IO Port */
+ if ((nxt_card->hw.type == SDLA_S508) &&
+ (nxt_card->hw.port == conf->ioport) &&
+ (nxt_card->next == NULL)){
+
+ /* We found a card the card that has same configuration
+ * as us. This means, that we must setup this card in
+ * piggibacking mode. However, only CHDLC and MPPP protocol
+ * support this setup */
+
+ if ((conf->config_id == WANCONFIG_CHDLC ||
+ conf->config_id == WANCONFIG_MPPP) &&
+ (nxt_card->wandev.config_id == WANCONFIG_CHDLC ||
+ nxt_card->wandev.config_id == WANCONFIG_MPPP)){
+
+ *irq = nxt_card->hw.irq;
+ memcpy(&card->hw, &nxt_card->hw, sizeof(sdlahw_t));
+
+ /* The master could already be running, we must
+ * set this as a critical area */
+ lock_adapter_irq(&nxt_card->wandev.lock, &smp_flags);
+
+ nxt_card->next = card;
+ card->next = nxt_card;
+
+ card->wandev.piggyback = WANOPT_YES;
+
+ /* We must initialise the piggiback spin lock here
+ * since isr will try to lock card->next if it
+ * exists */
+ spin_lock_init(&card->wandev.lock);
+
+ unlock_adapter_irq(&nxt_card->wandev.lock, &smp_flags);
+ break;
+ }else{
+ /* Trying to run piggibacking with a wrong protocol */
+ printk(KERN_INFO "%s: ERROR: Resource busy, ioport: 0x%x\n"
+ "%s: This protocol doesn't support\n"
+ "%s: multi-port operation!\n",
+ card->devname,nxt_card->hw.port,
+ card->devname,card->devname);
+ return -EEXIST;
+ }
+ }
+ }
+
+
+ /* Make sure I/O port region is available only if we are the
+ * master device. If we are running in piggybacking mode,
+ * we will use the resources of the master card. */
+ if (!card->wandev.piggyback) {
+ struct resource *rr =
+ request_region(conf->ioport, SDLA_MAXIORANGE, "sdlamain");
+ release_region(conf->ioport, SDLA_MAXIORANGE);
+
+ if (!rr) {
+ printk(KERN_INFO
+ "%s: I/O region 0x%X - 0x%X is in use!\n",
+ card->wandev.name, conf->ioport,
+ conf->ioport + SDLA_MAXIORANGE - 1);
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+/*==================================================================
+ * configure_s514_card
+ *
+ * For a S514 adapter, check for a possible configuration error in that
+ * we are loading an adapter in the same slot as a previously loaded S514
+ * card.
+ */
+
+
+static int check_s514_conflicts(sdla_t* card,wandev_conf_t* conf, int *irq)
+{
+ unsigned long smp_flags;
+ int i;
+
+ if (test_bit(0,&card->configured))
+ return 0;
+
+
+ /* Check for already loaded card with the same IO port and IRQ
+ * If found, copy its hardware configuration and use its
+ * resources (i.e. piggybacking)
+ */
+
+ for (i = 0; i < ncards; i ++) {
+
+ sdla_t* nxt_card = &card_array[i];
+ if(nxt_card == card)
+ continue;
+
+ if((nxt_card->hw.type == SDLA_S514) &&
+ (nxt_card->hw.S514_slot_no == conf->PCI_slot_no) &&
+ (nxt_card->hw.S514_cpu_no[0] == conf->S514_CPU_no[0])&&
+ (nxt_card->next == NULL)){
+
+
+ if ((conf->config_id == WANCONFIG_CHDLC ||
+ conf->config_id == WANCONFIG_MPPP) &&
+ (nxt_card->wandev.config_id == WANCONFIG_CHDLC ||
+ nxt_card->wandev.config_id == WANCONFIG_MPPP)){
+
+ *irq = nxt_card->hw.irq;
+ memcpy(&card->hw, &nxt_card->hw, sizeof(sdlahw_t));
+
+ /* The master could already be running, we must
+ * set this as a critical area */
+ lock_adapter_irq(&nxt_card->wandev.lock,&smp_flags);
+ nxt_card->next = card;
+ card->next = nxt_card;
+
+ card->wandev.piggyback = WANOPT_YES;
+
+ /* We must initialise the piggiback spin lock here
+ * since isr will try to lock card->next if it
+ * exists */
+ spin_lock_init(&card->wandev.lock);
+
+ unlock_adapter_irq(&nxt_card->wandev.lock,&smp_flags);
+
+ }else{
+ /* Trying to run piggibacking with a wrong protocol */
+ printk(KERN_INFO "%s: ERROR: Resource busy: CPU %c PCISLOT %i\n"
+ "%s: This protocol doesn't support\n"
+ "%s: multi-port operation!\n",
+ card->devname,
+ conf->S514_CPU_no[0],conf->PCI_slot_no,
+ card->devname,card->devname);
+ return -EEXIST;
+ }
+ }
+ }
+
+ return 0;
+}
+
+
+
+/*============================================================================
+ * Shut down WAN link driver.
+ * o shut down adapter hardware
+ * o release system resources.
+ *
+ * This function is called by the router when device is being unregistered or
+ * when it handles ROUTER_DOWN IOCTL.
+ */
+static int shutdown(struct wan_device* wandev)
+{
+ sdla_t *card;
+ int err=0;
+
+ /* sanity checks */
+ if ((wandev == NULL) || (wandev->private == NULL)){
+ return -EFAULT;
+ }
+
+ if (wandev->state == WAN_UNCONFIGURED){
+ return 0;
+ }
+
+ card = wandev->private;
+
+ if (card->tty_opt){
+ if (card->tty_open){
+ printk(KERN_INFO
+ "%s: Shutdown Failed: TTY is still open\n",
+ card->devname);
+ return -EBUSY;
+ }
+ }
+
+ wandev->state = WAN_UNCONFIGURED;
+
+ set_bit(PERI_CRIT,(void*)&wandev->critical);
+
+ /* In case of piggibacking, make sure that
+ * we never try to shutdown both devices at the same
+ * time, because they depend on one another */
+
+ if (card->disable_comm){
+ card->disable_comm(card);
+ }
+
+ /* Release Resources */
+ release_hw(card);
+
+ /* only free the allocated I/O range if not an S514 adapter */
+ if (wandev->hw_opt[0] != SDLA_S514 && !card->configured){
+ release_region(card->hw.port, card->hw.io_range);
+ }
+
+ if (!card->configured){
+ memset(&card->hw, 0, sizeof(sdlahw_t));
+ if (card->next){
+ memset(&card->next->hw, 0, sizeof(sdlahw_t));
+ }
+ }
+
+
+ clear_bit(PERI_CRIT,(void*)&wandev->critical);
+ return err;
+}
+
+static void release_hw (sdla_t *card)
+{
+ sdla_t *nxt_card;
+
+
+ /* Check if next device exists */
+ if (card->next){
+ nxt_card = card->next;
+ /* If next device is down then release resources */
+ if (nxt_card->wandev.state == WAN_UNCONFIGURED){
+ if (card->wandev.piggyback){
+ /* If this device is piggyback then use
+ * information of the master device
+ */
+ printk(KERN_INFO "%s: Piggyback shutting down\n",card->devname);
+ sdla_down(&card->next->hw);
+ free_irq(card->wandev.irq, card->next);
+ card->configured = 0;
+ card->next->configured = 0;
+ card->wandev.piggyback = 0;
+ }else{
+ /* Master device shutting down */
+ printk(KERN_INFO "%s: Master shutting down\n",card->devname);
+ sdla_down(&card->hw);
+ free_irq(card->wandev.irq, card);
+ card->configured = 0;
+ card->next->configured = 0;
+ }
+ }else{
+ printk(KERN_INFO "%s: Device still running %i\n",
+ nxt_card->devname,nxt_card->wandev.state);
+
+ card->configured = 1;
+ }
+ }else{
+ printk(KERN_INFO "%s: Master shutting down\n",card->devname);
+ sdla_down(&card->hw);
+ free_irq(card->wandev.irq, card);
+ card->configured = 0;
+ }
+ return;
+}
+
+
+/*============================================================================
+ * Driver I/O control.
+ * o verify arguments
+ * o perform requested action
+ *
+ * This function is called when router handles one of the reserved user
+ * IOCTLs. Note that 'arg' stil points to user address space.
+ */
+static int ioctl(struct wan_device* wandev, unsigned cmd, unsigned long arg)
+{
+ sdla_t* card;
+ int err;
+
+ /* sanity checks */
+ if ((wandev == NULL) || (wandev->private == NULL))
+ return -EFAULT;
+ if (wandev->state == WAN_UNCONFIGURED)
+ return -ENODEV;
+
+ card = wandev->private;
+
+ if(card->hw.type != SDLA_S514){
+ disable_irq(card->hw.irq);
+ }
+
+ if (test_bit(SEND_CRIT, (void*)&wandev->critical)) {
+ return -EAGAIN;
+ }
+
+ switch (cmd) {
+ case WANPIPE_DUMP:
+ err = ioctl_dump(wandev->private, (void*)arg);
+ break;
+
+ case WANPIPE_EXEC:
+ err = ioctl_exec(wandev->private, (void*)arg, cmd);
+ break;
+ default:
+ err = -EINVAL;
+ }
+
+ return err;
+}
+
+/****** Driver IOCTL Handlers ***********************************************/
+
+/*============================================================================
+ * Dump adapter memory to user buffer.
+ * o verify request structure
+ * o copy request structure to kernel data space
+ * o verify length/offset
+ * o verify user buffer
+ * o copy adapter memory image to user buffer
+ *
+ * Note: when dumping memory, this routine switches curent dual-port memory
+ * vector, so care must be taken to avoid racing conditions.
+ */
+static int ioctl_dump (sdla_t* card, sdla_dump_t* u_dump)
+{
+ sdla_dump_t dump;
+ unsigned winsize;
+ unsigned long oldvec; /* DPM window vector */
+ unsigned long smp_flags;
+ int err = 0;
+
+ if(copy_from_user((void*)&dump, (void*)u_dump, sizeof(sdla_dump_t)))
+ return -EFAULT;
+
+ if ((dump.magic != WANPIPE_MAGIC) ||
+ (dump.offset + dump.length > card->hw.memory))
+ return -EINVAL;
+
+ winsize = card->hw.dpmsize;
+
+ if(card->hw.type != SDLA_S514) {
+
+ lock_adapter_irq(&card->wandev.lock, &smp_flags);
+
+ oldvec = card->hw.vector;
+ while (dump.length) {
+ /* current offset */
+ unsigned pos = dump.offset % winsize;
+ /* current vector */
+ unsigned long vec = dump.offset - pos;
+ unsigned len = (dump.length > (winsize - pos)) ?
+ (winsize - pos) : dump.length;
+ /* relocate window */
+ if (sdla_mapmem(&card->hw, vec) != 0) {
+ err = -EIO;
+ break;
+ }
+
+ if(copy_to_user((void *)dump.ptr,
+ (u8 *)card->hw.dpmbase + pos, len)){
+
+ unlock_adapter_irq(&card->wandev.lock, &smp_flags);
+ return -EFAULT;
+ }
+
+ dump.length -= len;
+ dump.offset += len;
+ dump.ptr = (char*)dump.ptr + len;
+ }
+
+ sdla_mapmem(&card->hw, oldvec);/* restore DPM window position */
+ unlock_adapter_irq(&card->wandev.lock, &smp_flags);
+
+ }else {
+
+ if(copy_to_user((void *)dump.ptr,
+ (u8 *)card->hw.dpmbase + dump.offset, dump.length)){
+ return -EFAULT;
+ }
+ }
+
+ return err;
+}
+
+/*============================================================================
+ * Execute adapter firmware command.
+ * o verify request structure
+ * o copy request structure to kernel data space
+ * o call protocol-specific 'exec' function
+ */
+static int ioctl_exec (sdla_t* card, sdla_exec_t* u_exec, int cmd)
+{
+ sdla_exec_t exec;
+ int err=0;
+
+ if (card->exec == NULL && cmd == WANPIPE_EXEC){
+ return -ENODEV;
+ }
+
+ if(copy_from_user((void*)&exec, (void*)u_exec, sizeof(sdla_exec_t)))
+ return -EFAULT;
+
+ if ((exec.magic != WANPIPE_MAGIC) || (exec.cmd == NULL))
+ return -EINVAL;
+
+ switch (cmd) {
+ case WANPIPE_EXEC:
+ err = card->exec(card, exec.cmd, exec.data);
+ break;
+ }
+ return err;
+}
+
+/******* Miscellaneous ******************************************************/
+
+/*============================================================================
+ * SDLA Interrupt Service Routine.
+ * o acknowledge SDLA hardware interrupt.
+ * o call protocol-specific interrupt service routine, if any.
+ */
+STATIC irqreturn_t sdla_isr (int irq, void* dev_id, struct pt_regs *regs)
+{
+#define card ((sdla_t*)dev_id)
+
+ if(card->hw.type == SDLA_S514) { /* handle interrrupt on S514 */
+ u32 int_status;
+ unsigned char CPU_no = card->hw.S514_cpu_no[0];
+ unsigned char card_found_for_IRQ;
+ u8 IRQ_count = 0;
+
+ for(;;) {
+
+ read_S514_int_stat(&card->hw, &int_status);
+
+ /* check if the interrupt is for this device */
+ if(!((unsigned char)int_status &
+ (IRQ_CPU_A | IRQ_CPU_B)))
+ return IRQ_HANDLED;
+
+ /* if the IRQ is for both CPUs on the same adapter, */
+ /* then alter the interrupt status so as to handle */
+ /* one CPU at a time */
+ if(((unsigned char)int_status & (IRQ_CPU_A | IRQ_CPU_B))
+ == (IRQ_CPU_A | IRQ_CPU_B)) {
+ int_status &= (CPU_no == S514_CPU_A) ?
+ ~IRQ_CPU_B : ~IRQ_CPU_A;
+ }
+
+ card_found_for_IRQ = 0;
+
+ /* check to see that the CPU number for this device */
+ /* corresponds to the interrupt status read */
+ switch (CPU_no) {
+ case S514_CPU_A:
+ if((unsigned char)int_status &
+ IRQ_CPU_A)
+ card_found_for_IRQ = 1;
+ break;
+
+ case S514_CPU_B:
+ if((unsigned char)int_status &
+ IRQ_CPU_B)
+ card_found_for_IRQ = 1;
+ break;
+ }
+
+ /* exit if the interrupt is for another CPU on the */
+ /* same IRQ */
+ if(!card_found_for_IRQ)
+ return IRQ_HANDLED;
+
+ if (!card ||
+ (card->wandev.state == WAN_UNCONFIGURED && !card->configured)){
+ printk(KERN_INFO
+ "Received IRQ %d for CPU #%c\n",
+ irq, CPU_no);
+ printk(KERN_INFO
+ "IRQ for unconfigured adapter\n");
+ S514_intack(&card->hw, int_status);
+ return IRQ_HANDLED;
+ }
+
+ if (card->in_isr) {
+ printk(KERN_INFO
+ "%s: interrupt re-entrancy on IRQ %d\n",
+ card->devname, card->wandev.irq);
+ S514_intack(&card->hw, int_status);
+ return IRQ_HANDLED;
+ }
+
+ spin_lock(&card->wandev.lock);
+ if (card->next){
+ spin_lock(&card->next->wandev.lock);
+ }
+
+ S514_intack(&card->hw, int_status);
+ if (card->isr)
+ card->isr(card);
+
+ if (card->next){
+ spin_unlock(&card->next->wandev.lock);
+ }
+ spin_unlock(&card->wandev.lock);
+
+ /* handle a maximum of two interrupts (one for each */
+ /* CPU on the adapter) before returning */
+ if((++ IRQ_count) == 2)
+ return IRQ_HANDLED;
+ }
+ }
+
+ else { /* handle interrupt on S508 adapter */
+
+ if (!card || ((card->wandev.state == WAN_UNCONFIGURED) && !card->configured))
+ return IRQ_HANDLED;
+
+ if (card->in_isr) {
+ printk(KERN_INFO
+ "%s: interrupt re-entrancy on IRQ %d!\n",
+ card->devname, card->wandev.irq);
+ return IRQ_HANDLED;
+ }
+
+ spin_lock(&card->wandev.lock);
+ if (card->next){
+ spin_lock(&card->next->wandev.lock);
+ }
+
+ sdla_intack(&card->hw);
+ if (card->isr)
+ card->isr(card);
+
+ if (card->next){
+ spin_unlock(&card->next->wandev.lock);
+ }
+ spin_unlock(&card->wandev.lock);
+
+ }
+ return IRQ_HANDLED;
+#undef card
+}
+
+/*============================================================================
+ * This routine is called by the protocol-specific modules when network
+ * interface is being open. The only reason we need this, is because we
+ * have to call MOD_INC_USE_COUNT, but cannot include 'module.h' where it's
+ * defined more than once into the same kernel module.
+ */
+void wanpipe_open (sdla_t* card)
+{
+ ++card->open_cnt;
+}
+
+/*============================================================================
+ * This routine is called by the protocol-specific modules when network
+ * interface is being closed. The only reason we need this, is because we
+ * have to call MOD_DEC_USE_COUNT, but cannot include 'module.h' where it's
+ * defined more than once into the same kernel module.
+ */
+void wanpipe_close (sdla_t* card)
+{
+ --card->open_cnt;
+}
+
+/*============================================================================
+ * Set WAN device state.
+ */
+void wanpipe_set_state (sdla_t* card, int state)
+{
+ if (card->wandev.state != state) {
+ switch (state) {
+ case WAN_CONNECTED:
+ printk (KERN_INFO "%s: link connected!\n",
+ card->devname);
+ break;
+
+ case WAN_CONNECTING:
+ printk (KERN_INFO "%s: link connecting...\n",
+ card->devname);
+ break;
+
+ case WAN_DISCONNECTED:
+ printk (KERN_INFO "%s: link disconnected!\n",
+ card->devname);
+ break;
+ }
+ card->wandev.state = state;
+ }
+ card->state_tick = jiffies;
+}
+
+sdla_t * wanpipe_find_card (char *name)
+{
+ int cnt;
+ for (cnt = 0; cnt < ncards; ++ cnt) {
+ sdla_t* card = &card_array[cnt];
+ if (!strcmp(card->devname,name))
+ return card;
+ }
+ return NULL;
+}
+
+sdla_t * wanpipe_find_card_num (int num)
+{
+ if (num < 1 || num > ncards)
+ return NULL;
+ num--;
+ return &card_array[num];
+}
+
+/*
+ * @work_pointer: work_struct to be done;
+ * should already have PREPARE_WORK() or
+ * INIT_WORK() done on it by caller;
+ */
+void wanpipe_queue_work (struct work_struct *work_pointer)
+{
+ if (test_and_set_bit(1, (void*)&wanpipe_bh_critical))
+ printk(KERN_INFO "CRITICAL IN QUEUING WORK\n");
+
+ queue_work(wanpipe_wq, work_pointer);
+ clear_bit(1,(void*)&wanpipe_bh_critical);
+}
+
+void wakeup_sk_bh(struct net_device *dev)
+{
+ wanpipe_common_t *chan = dev->priv;
+
+ if (test_bit(0,&chan->common_critical))
+ return;
+
+ if (chan->sk && chan->tx_timer){
+ chan->tx_timer->expires=jiffies+1;
+ add_timer(chan->tx_timer);
+ }
+}
+
+int change_dev_flags(struct net_device *dev, unsigned flags)
+{
+ struct ifreq if_info;
+ mm_segment_t fs = get_fs();
+ int err;
+
+ memset(&if_info, 0, sizeof(if_info));
+ strcpy(if_info.ifr_name, dev->name);
+ if_info.ifr_flags = flags;
+
+ set_fs(get_ds()); /* get user space block */
+ err = devinet_ioctl(SIOCSIFFLAGS, &if_info);
+ set_fs(fs);
+
+ return err;
+}
+
+unsigned long get_ip_address(struct net_device *dev, int option)
+{
+
+ struct in_ifaddr *ifaddr;
+ struct in_device *in_dev;
+
+ if ((in_dev = __in_dev_get(dev)) == NULL){
+ return 0;
+ }
+
+ if ((ifaddr = in_dev->ifa_list)== NULL ){
+ return 0;
+ }
+
+ switch (option){
+
+ case WAN_LOCAL_IP:
+ return ifaddr->ifa_local;
+ break;
+
+ case WAN_POINTOPOINT_IP:
+ return ifaddr->ifa_address;
+ break;
+
+ case WAN_NETMASK_IP:
+ return ifaddr->ifa_mask;
+ break;
+
+ case WAN_BROADCAST_IP:
+ return ifaddr->ifa_broadcast;
+ break;
+ default:
+ return 0;
+ }
+
+ return 0;
+}
+
+void add_gateway(sdla_t *card, struct net_device *dev)
+{
+ mm_segment_t oldfs;
+ struct rtentry route;
+ int res;
+
+ memset((char*)&route,0,sizeof(struct rtentry));
+
+ ((struct sockaddr_in *)
+ &(route.rt_dst))->sin_addr.s_addr = 0;
+ ((struct sockaddr_in *)
+ &(route.rt_dst))->sin_family = AF_INET;
+
+ ((struct sockaddr_in *)
+ &(route.rt_genmask))->sin_addr.s_addr = 0;
+ ((struct sockaddr_in *)
+ &(route.rt_genmask)) ->sin_family = AF_INET;
+
+
+ route.rt_flags = 0;
+ route.rt_dev = dev->name;
+
+ oldfs = get_fs();
+ set_fs(get_ds());
+ res = ip_rt_ioctl(SIOCADDRT,&route);
+ set_fs(oldfs);
+
+ if (res == 0){
+ printk(KERN_INFO "%s: Gateway added for %s\n",
+ card->devname,dev->name);
+ }
+
+ return;
+}
+
+MODULE_LICENSE("GPL");
+
+/****** End *********************************************************/