/**************************************************************************** * sdlamain.c WANPIPE(tm) Multiprotocol WAN Link Driver. Main module. * * Author: Nenad Corbic * 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 /* OS configuration options */ #include /* offsetof(), etc. */ #include /* return codes */ #include /* inline memset(), etc. */ #include #include /* kmalloc(), kfree() */ #include /* printk(), and other useful stuff */ #include /* support for loadable modules */ #include /* request_region(), release_region() */ #include /* WAN router definitions */ #include /* WANPIPE common user API definitions */ #include #include /* phys_to_virt() */ #include #include #include #include /* kernel <-> user copy */ #include #include #include #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 *********************************************************/