/* * drivers/s390/net/claw.c * ESCON CLAW network driver * * Linux for zSeries version * Copyright IBM Corp. 2002, 2009 * Author(s) Original code written by: * Kazuo Iimura <iimura@jp.ibm.com> * Rewritten by * Andy Richter <richtera@us.ibm.com> * Marc Price <mwprice@us.ibm.com> * * sysfs parms: * group x.x.rrrr,x.x.wwww * read_buffer nnnnnnn * write_buffer nnnnnn * host_name aaaaaaaa * adapter_name aaaaaaaa * api_type aaaaaaaa * * eg. * group 0.0.0200 0.0.0201 * read_buffer 25 * write_buffer 20 * host_name LINUX390 * adapter_name RS6K * api_type TCPIP * * where * * The device id is decided by the order entries * are added to the group the first is claw0 the second claw1 * up to CLAW_MAX_DEV * * rrrr - the first of 2 consecutive device addresses used for the * CLAW protocol. * The specified address is always used as the input (Read) * channel and the next address is used as the output channel. * * wwww - the second of 2 consecutive device addresses used for * the CLAW protocol. * The specified address is always used as the output * channel and the previous address is used as the input channel. * * read_buffer - specifies number of input buffers to allocate. * write_buffer - specifies number of output buffers to allocate. * host_name - host name * adaptor_name - adaptor name * api_type - API type TCPIP or API will be sent and expected * as ws_name * * Note the following requirements: * 1) host_name must match the configured adapter_name on the remote side * 2) adaptor_name must match the configured host name on the remote side * * Change History * 1.00 Initial release shipped * 1.10 Changes for Buffer allocation * 1.15 Changed for 2.6 Kernel No longer compiles on 2.4 or lower * 1.25 Added Packing support * 1.5 */ #define KMSG_COMPONENT "claw" #include <asm/ccwdev.h> #include <asm/ccwgroup.h> #include <asm/debug.h> #include <asm/idals.h> #include <asm/io.h> #include <linux/bitops.h> #include <linux/ctype.h> #include <linux/delay.h> #include <linux/errno.h> #include <linux/if_arp.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/ip.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/netdevice.h> #include <linux/etherdevice.h> #include <linux/proc_fs.h> #include <linux/sched.h> #include <linux/signal.h> #include <linux/skbuff.h> #include <linux/slab.h> #include <linux/string.h> #include <linux/tcp.h> #include <linux/timer.h> #include <linux/types.h> #include "claw.h" /* CLAW uses the s390dbf file system see claw_trace and claw_setup */ static char version[] __initdata = "CLAW driver"; static char debug_buffer[255]; /** * Debug Facility Stuff */ static debug_info_t *claw_dbf_setup; static debug_info_t *claw_dbf_trace; /** * CLAW Debug Facility functions */ static void claw_unregister_debug_facility(void) { if (claw_dbf_setup) debug_unregister(claw_dbf_setup); if (claw_dbf_trace) debug_unregister(claw_dbf_trace); } static int claw_register_debug_facility(void) { claw_dbf_setup = debug_register("claw_setup", 2, 1, 8); claw_dbf_trace = debug_register("claw_trace", 2, 2, 8); if (claw_dbf_setup == NULL || claw_dbf_trace == NULL) { claw_unregister_debug_facility(); return -ENOMEM; } debug_register_view(claw_dbf_setup, &debug_hex_ascii_view); debug_set_level(claw_dbf_setup, 2); debug_register_view(claw_dbf_trace, &debug_hex_ascii_view); debug_set_level(claw_dbf_trace, 2); return 0; } static inline void claw_set_busy(struct net_device *dev) { ((struct claw_privbk *)dev->ml_priv)->tbusy = 1; eieio(); } static inline void claw_clear_busy(struct net_device *dev) { clear_bit(0, &(((struct claw_privbk *) dev->ml_priv)->tbusy)); netif_wake_queue(dev); eieio(); } static inline int claw_check_busy(struct net_device *dev) { eieio(); return ((struct claw_privbk *) dev->ml_priv)->tbusy; } static inline void claw_setbit_busy(int nr,struct net_device *dev) { netif_stop_queue(dev); set_bit(nr, (void *)&(((struct claw_privbk *)dev->ml_priv)->tbusy)); } static inline void claw_clearbit_busy(int nr,struct net_device *dev) { clear_bit(nr, (void *)&(((struct claw_privbk *)dev->ml_priv)->tbusy)); netif_wake_queue(dev); } static inline int claw_test_and_setbit_busy(int nr,struct net_device *dev) { netif_stop_queue(dev); return test_and_set_bit(nr, (void *)&(((struct claw_privbk *) dev->ml_priv)->tbusy)); } /* Functions for the DEV methods */ static int claw_probe(struct ccwgroup_device *cgdev); static void claw_remove_device(struct ccwgroup_device *cgdev); static void claw_purge_skb_queue(struct sk_buff_head *q); static int claw_new_device(struct ccwgroup_device *cgdev); static int claw_shutdown_device(struct ccwgroup_device *cgdev); static int claw_tx(struct sk_buff *skb, struct net_device *dev); static int claw_change_mtu( struct net_device *dev, int new_mtu); static int claw_open(struct net_device *dev); static void claw_irq_handler(struct ccw_device *cdev, unsigned long intparm, struct irb *irb); static void claw_irq_tasklet ( unsigned long data ); static int claw_release(struct net_device *dev); static void claw_write_retry ( struct chbk * p_ch ); static void claw_write_next ( struct chbk * p_ch ); static void claw_timer ( struct chbk * p_ch ); /* Functions */ static int add_claw_reads(struct net_device *dev, struct ccwbk* p_first, struct ccwbk* p_last); static void ccw_check_return_code (struct ccw_device *cdev, int return_code); static void ccw_check_unit_check (struct chbk * p_ch, unsigned char sense ); static int find_link(struct net_device *dev, char *host_name, char *ws_name ); static int claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid); static int init_ccw_bk(struct net_device *dev); static void probe_error( struct ccwgroup_device *cgdev); static struct net_device_stats *claw_stats(struct net_device *dev); static int pages_to_order_of_mag(int num_of_pages); static struct sk_buff *claw_pack_skb(struct claw_privbk *privptr); /* sysfs Functions */ static ssize_t claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf); static ssize_t claw_hname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count); static ssize_t claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf); static ssize_t claw_adname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count); static ssize_t claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf); static ssize_t claw_apname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count); static ssize_t claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf); static ssize_t claw_wbuff_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count); static ssize_t claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf); static ssize_t claw_rbuff_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count); static int claw_add_files(struct device *dev); static void claw_remove_files(struct device *dev); /* Functions for System Validate */ static int claw_process_control( struct net_device *dev, struct ccwbk * p_ccw); static int claw_send_control(struct net_device *dev, __u8 type, __u8 link, __u8 correlator, __u8 rc , char *local_name, char *remote_name); static int claw_snd_conn_req(struct net_device *dev, __u8 link); static int claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl); static int claw_snd_sys_validate_rsp(struct net_device *dev, struct clawctl * p_ctl, __u32 return_code); static int claw_strt_conn_req(struct net_device *dev ); static void claw_strt_read(struct net_device *dev, int lock); static void claw_strt_out_IO(struct net_device *dev); static void claw_free_wrt_buf(struct net_device *dev); /* Functions for unpack reads */ static void unpack_read(struct net_device *dev); static int claw_pm_prepare(struct ccwgroup_device *gdev) { return -EPERM; } /* the root device for claw group devices */ static struct device *claw_root_dev; /* ccwgroup table */ static struct ccwgroup_driver claw_group_driver = { .driver = { .owner = THIS_MODULE, .name = "claw", }, .max_slaves = 2, .driver_id = 0xC3D3C1E6, .probe = claw_probe, .remove = claw_remove_device, .set_online = claw_new_device, .set_offline = claw_shutdown_device, .prepare = claw_pm_prepare, }; static struct ccw_device_id claw_ids[] = { {CCW_DEVICE(0x3088, 0x61), .driver_info = claw_channel_type_claw}, {}, }; MODULE_DEVICE_TABLE(ccw, claw_ids); static struct ccw_driver claw_ccw_driver = { .driver = { .owner = THIS_MODULE, .name = "claw", }, .ids = claw_ids, .probe = ccwgroup_probe_ccwdev, .remove = ccwgroup_remove_ccwdev, .int_class = IOINT_CLW, }; static ssize_t claw_driver_group_store(struct device_driver *ddrv, const char *buf, size_t count) { int err; err = ccwgroup_create_from_string(claw_root_dev, claw_group_driver.driver_id, &claw_ccw_driver, 2, buf); return err ? err : count; } static DRIVER_ATTR(group, 0200, NULL, claw_driver_group_store); static struct attribute *claw_group_attrs[] = { &driver_attr_group.attr, NULL, }; static struct attribute_group claw_group_attr_group = { .attrs = claw_group_attrs, }; static const struct attribute_group *claw_group_attr_groups[] = { &claw_group_attr_group, NULL, }; /* * Key functions */ /*----------------------------------------------------------------* * claw_probe * * this function is called for each CLAW device. * *----------------------------------------------------------------*/ static int claw_probe(struct ccwgroup_device *cgdev) { int rc; struct claw_privbk *privptr=NULL; CLAW_DBF_TEXT(2, setup, "probe"); if (!get_device(&cgdev->dev)) return -ENODEV; privptr = kzalloc(sizeof(struct claw_privbk), GFP_KERNEL); dev_set_drvdata(&cgdev->dev, privptr); if (privptr == NULL) { probe_error(cgdev); put_device(&cgdev->dev); CLAW_DBF_TEXT_(2, setup, "probex%d", -ENOMEM); return -ENOMEM; } privptr->p_mtc_envelope= kzalloc( MAX_ENVELOPE_SIZE, GFP_KERNEL); privptr->p_env = kzalloc(sizeof(struct claw_env), GFP_KERNEL); if ((privptr->p_mtc_envelope==NULL) || (privptr->p_env==NULL)) { probe_error(cgdev); put_device(&cgdev->dev); CLAW_DBF_TEXT_(2, setup, "probex%d", -ENOMEM); return -ENOMEM; } memcpy(privptr->p_env->adapter_name,WS_NAME_NOT_DEF,8); memcpy(privptr->p_env->host_name,WS_NAME_NOT_DEF,8); memcpy(privptr->p_env->api_type,WS_NAME_NOT_DEF,8); privptr->p_env->packing = 0; privptr->p_env->write_buffers = 5; privptr->p_env->read_buffers = 5; privptr->p_env->read_size = CLAW_FRAME_SIZE; privptr->p_env->write_size = CLAW_FRAME_SIZE; rc = claw_add_files(&cgdev->dev); if (rc) { probe_error(cgdev); put_device(&cgdev->dev); dev_err(&cgdev->dev, "Creating the /proc files for a new" " CLAW device failed\n"); CLAW_DBF_TEXT_(2, setup, "probex%d", rc); return rc; } privptr->p_env->p_priv = privptr; cgdev->cdev[0]->handler = claw_irq_handler; cgdev->cdev[1]->handler = claw_irq_handler; CLAW_DBF_TEXT(2, setup, "prbext 0"); return 0; } /* end of claw_probe */ /*-------------------------------------------------------------------* * claw_tx * *-------------------------------------------------------------------*/ static int claw_tx(struct sk_buff *skb, struct net_device *dev) { int rc; struct claw_privbk *privptr = dev->ml_priv; unsigned long saveflags; struct chbk *p_ch; CLAW_DBF_TEXT(4, trace, "claw_tx"); p_ch = &privptr->channel[WRITE_CHANNEL]; spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags); rc=claw_hw_tx( skb, dev, 1 ); spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags); CLAW_DBF_TEXT_(4, trace, "clawtx%d", rc); if (rc) rc = NETDEV_TX_BUSY; else rc = NETDEV_TX_OK; return rc; } /* end of claw_tx */ /*------------------------------------------------------------------* * pack the collect queue into an skb and return it * * If not packing just return the top skb from the queue * *------------------------------------------------------------------*/ static struct sk_buff * claw_pack_skb(struct claw_privbk *privptr) { struct sk_buff *new_skb,*held_skb; struct chbk *p_ch = &privptr->channel[WRITE_CHANNEL]; struct claw_env *p_env = privptr->p_env; int pkt_cnt,pk_ind,so_far; new_skb = NULL; /* assume no dice */ pkt_cnt = 0; CLAW_DBF_TEXT(4, trace, "PackSKBe"); if (!skb_queue_empty(&p_ch->collect_queue)) { /* some data */ held_skb = skb_dequeue(&p_ch->collect_queue); if (held_skb) dev_kfree_skb_any(held_skb); else return NULL; if (p_env->packing != DO_PACKED) return held_skb; /* get a new SKB we will pack at least one */ new_skb = dev_alloc_skb(p_env->write_size); if (new_skb == NULL) { atomic_inc(&held_skb->users); skb_queue_head(&p_ch->collect_queue,held_skb); return NULL; } /* we have packed packet and a place to put it */ pk_ind = 1; so_far = 0; new_skb->cb[1] = 'P'; /* every skb on queue has pack header */ while ((pk_ind) && (held_skb != NULL)) { if (held_skb->len+so_far <= p_env->write_size-8) { memcpy(skb_put(new_skb,held_skb->len), held_skb->data,held_skb->len); privptr->stats.tx_packets++; so_far += held_skb->len; pkt_cnt++; dev_kfree_skb_any(held_skb); held_skb = skb_dequeue(&p_ch->collect_queue); if (held_skb) atomic_dec(&held_skb->users); } else { pk_ind = 0; atomic_inc(&held_skb->users); skb_queue_head(&p_ch->collect_queue,held_skb); } } } CLAW_DBF_TEXT(4, trace, "PackSKBx"); return new_skb; } /*-------------------------------------------------------------------* * claw_change_mtu * * * *-------------------------------------------------------------------*/ static int claw_change_mtu(struct net_device *dev, int new_mtu) { struct claw_privbk *privptr = dev->ml_priv; int buff_size; CLAW_DBF_TEXT(4, trace, "setmtu"); buff_size = privptr->p_env->write_size; if ((new_mtu < 60) || (new_mtu > buff_size)) { return -EINVAL; } dev->mtu = new_mtu; return 0; } /* end of claw_change_mtu */ /*-------------------------------------------------------------------* * claw_open * * * *-------------------------------------------------------------------*/ static int claw_open(struct net_device *dev) { int rc; int i; unsigned long saveflags=0; unsigned long parm; struct claw_privbk *privptr; DECLARE_WAITQUEUE(wait, current); struct timer_list timer; struct ccwbk *p_buf; CLAW_DBF_TEXT(4, trace, "open"); privptr = (struct claw_privbk *)dev->ml_priv; /* allocate and initialize CCW blocks */ if (privptr->buffs_alloc == 0) { rc=init_ccw_bk(dev); if (rc) { CLAW_DBF_TEXT(2, trace, "openmem"); return -ENOMEM; } } privptr->system_validate_comp=0; privptr->release_pend=0; if(strncmp(privptr->p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) { privptr->p_env->read_size=DEF_PACK_BUFSIZE; privptr->p_env->write_size=DEF_PACK_BUFSIZE; privptr->p_env->packing=PACKING_ASK; } else { privptr->p_env->packing=0; privptr->p_env->read_size=CLAW_FRAME_SIZE; privptr->p_env->write_size=CLAW_FRAME_SIZE; } claw_set_busy(dev); tasklet_init(&privptr->channel[READ_CHANNEL].tasklet, claw_irq_tasklet, (unsigned long) &privptr->channel[READ_CHANNEL]); for ( i = 0; i < 2; i++) { CLAW_DBF_TEXT_(2, trace, "opn_ch%d", i); init_waitqueue_head(&privptr->channel[i].wait); /* skb_queue_head_init(&p_ch->io_queue); */ if (i == WRITE_CHANNEL) skb_queue_head_init( &privptr->channel[WRITE_CHANNEL].collect_queue); privptr->channel[i].flag_a = 0; privptr->channel[i].IO_active = 0; privptr->channel[i].flag &= ~CLAW_TIMER; init_timer(&timer); timer.function = (void *)claw_timer; timer.data = (unsigned long)(&privptr->channel[i]); timer.expires = jiffies + 15*HZ; add_timer(&timer); spin_lock_irqsave(get_ccwdev_lock( privptr->channel[i].cdev), saveflags); parm = (unsigned long) &privptr->channel[i]; privptr->channel[i].claw_state = CLAW_START_HALT_IO; rc = 0; add_wait_queue(&privptr->channel[i].wait, &wait); rc = ccw_device_halt( (struct ccw_device *)privptr->channel[i].cdev,parm); set_current_state(TASK_INTERRUPTIBLE); spin_unlock_irqrestore( get_ccwdev_lock(privptr->channel[i].cdev), saveflags); schedule(); set_current_state(TASK_RUNNING); remove_wait_queue(&privptr->channel[i].wait, &wait); if(rc != 0) ccw_check_return_code(privptr->channel[i].cdev, rc); if((privptr->channel[i].flag & CLAW_TIMER) == 0x00) del_timer(&timer); } if ((((privptr->channel[READ_CHANNEL].last_dstat | privptr->channel[WRITE_CHANNEL].last_dstat) & ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) || (((privptr->channel[READ_CHANNEL].flag | privptr->channel[WRITE_CHANNEL].flag) & CLAW_TIMER) != 0x00)) { dev_info(&privptr->channel[READ_CHANNEL].cdev->dev, "%s: remote side is not ready\n", dev->name); CLAW_DBF_TEXT(2, trace, "notrdy"); for ( i = 0; i < 2; i++) { spin_lock_irqsave( get_ccwdev_lock(privptr->channel[i].cdev), saveflags); parm = (unsigned long) &privptr->channel[i]; privptr->channel[i].claw_state = CLAW_STOP; rc = ccw_device_halt( (struct ccw_device *)&privptr->channel[i].cdev, parm); spin_unlock_irqrestore( get_ccwdev_lock(privptr->channel[i].cdev), saveflags); if (rc != 0) { ccw_check_return_code( privptr->channel[i].cdev, rc); } } free_pages((unsigned long)privptr->p_buff_ccw, (int)pages_to_order_of_mag(privptr->p_buff_ccw_num)); if (privptr->p_env->read_size < PAGE_SIZE) { free_pages((unsigned long)privptr->p_buff_read, (int)pages_to_order_of_mag( privptr->p_buff_read_num)); } else { p_buf=privptr->p_read_active_first; while (p_buf!=NULL) { free_pages((unsigned long)p_buf->p_buffer, (int)pages_to_order_of_mag( privptr->p_buff_pages_perread )); p_buf=p_buf->next; } } if (privptr->p_env->write_size < PAGE_SIZE ) { free_pages((unsigned long)privptr->p_buff_write, (int)pages_to_order_of_mag( privptr->p_buff_write_num)); } else { p_buf=privptr->p_write_active_first; while (p_buf!=NULL) { free_pages((unsigned long)p_buf->p_buffer, (int)pages_to_order_of_mag( privptr->p_buff_pages_perwrite )); p_buf=p_buf->next; } } privptr->buffs_alloc = 0; privptr->channel[READ_CHANNEL].flag = 0x00; privptr->channel[WRITE_CHANNEL].flag = 0x00; privptr->p_buff_ccw=NULL; privptr->p_buff_read=NULL; privptr->p_buff_write=NULL; claw_clear_busy(dev); CLAW_DBF_TEXT(2, trace, "open EIO"); return -EIO; } /* Send SystemValidate command */ claw_clear_busy(dev); CLAW_DBF_TEXT(4, trace, "openok"); return 0; } /* end of claw_open */ /*-------------------------------------------------------------------* * * * claw_irq_handler * * * *--------------------------------------------------------------------*/ static void claw_irq_handler(struct ccw_device *cdev, unsigned long intparm, struct irb *irb) { struct chbk *p_ch = NULL; struct claw_privbk *privptr = NULL; struct net_device *dev = NULL; struct claw_env *p_env; struct chbk *p_ch_r=NULL; CLAW_DBF_TEXT(4, trace, "clawirq"); /* Bypass all 'unsolicited interrupts' */ privptr = dev_get_drvdata(&cdev->dev); if (!privptr) { dev_warn(&cdev->dev, "An uninitialized CLAW device received an" " IRQ, c-%02x d-%02x\n", irb->scsw.cmd.cstat, irb->scsw.cmd.dstat); CLAW_DBF_TEXT(2, trace, "badirq"); return; } /* Try to extract channel from driver data. */ if (privptr->channel[READ_CHANNEL].cdev == cdev) p_ch = &privptr->channel[READ_CHANNEL]; else if (privptr->channel[WRITE_CHANNEL].cdev == cdev) p_ch = &privptr->channel[WRITE_CHANNEL]; else { dev_warn(&cdev->dev, "The device is not a CLAW device\n"); CLAW_DBF_TEXT(2, trace, "badchan"); return; } CLAW_DBF_TEXT_(4, trace, "IRQCH=%d", p_ch->flag); dev = (struct net_device *) (p_ch->ndev); p_env=privptr->p_env; /* Copy interruption response block. */ memcpy(p_ch->irb, irb, sizeof(struct irb)); /* Check for good subchannel return code, otherwise info message */ if (irb->scsw.cmd.cstat && !(irb->scsw.cmd.cstat & SCHN_STAT_PCI)) { dev_info(&cdev->dev, "%s: subchannel check for device: %04x -" " Sch Stat %02x Dev Stat %02x CPA - %04x\n", dev->name, p_ch->devno, irb->scsw.cmd.cstat, irb->scsw.cmd.dstat, irb->scsw.cmd.cpa); CLAW_DBF_TEXT(2, trace, "chanchk"); /* return; */ } /* Check the reason-code of a unit check */ if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) ccw_check_unit_check(p_ch, irb->ecw[0]); /* State machine to bring the connection up, down and to restart */ p_ch->last_dstat = irb->scsw.cmd.dstat; switch (p_ch->claw_state) { case CLAW_STOP:/* HALT_IO by claw_release (halt sequence) */ if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) || (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) || (p_ch->irb->scsw.cmd.stctl == (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) return; wake_up(&p_ch->wait); /* wake up claw_release */ CLAW_DBF_TEXT(4, trace, "stop"); return; case CLAW_START_HALT_IO: /* HALT_IO issued by claw_open */ if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) || (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) || (p_ch->irb->scsw.cmd.stctl == (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) { CLAW_DBF_TEXT(4, trace, "haltio"); return; } if (p_ch->flag == CLAW_READ) { p_ch->claw_state = CLAW_START_READ; wake_up(&p_ch->wait); /* wake claw_open (READ)*/ } else if (p_ch->flag == CLAW_WRITE) { p_ch->claw_state = CLAW_START_WRITE; /* send SYSTEM_VALIDATE */ claw_strt_read(dev, LOCK_NO); claw_send_control(dev, SYSTEM_VALIDATE_REQUEST, 0, 0, 0, p_env->host_name, p_env->adapter_name); } else { dev_warn(&cdev->dev, "The CLAW device received" " an unexpected IRQ, " "c-%02x d-%02x\n", irb->scsw.cmd.cstat, irb->scsw.cmd.dstat); return; } CLAW_DBF_TEXT(4, trace, "haltio"); return; case CLAW_START_READ: CLAW_DBF_TEXT(4, trace, "ReadIRQ"); if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) { clear_bit(0, (void *)&p_ch->IO_active); if ((p_ch->irb->ecw[0] & 0x41) == 0x41 || (p_ch->irb->ecw[0] & 0x40) == 0x40 || (p_ch->irb->ecw[0]) == 0) { privptr->stats.rx_errors++; dev_info(&cdev->dev, "%s: Restart is required after remote " "side recovers \n", dev->name); } CLAW_DBF_TEXT(4, trace, "notrdy"); return; } if ((p_ch->irb->scsw.cmd.cstat & SCHN_STAT_PCI) && (p_ch->irb->scsw.cmd.dstat == 0)) { if (test_and_set_bit(CLAW_BH_ACTIVE, (void *)&p_ch->flag_a) == 0) tasklet_schedule(&p_ch->tasklet); else CLAW_DBF_TEXT(4, trace, "PCINoBH"); CLAW_DBF_TEXT(4, trace, "PCI_read"); return; } if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) || (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) || (p_ch->irb->scsw.cmd.stctl == (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) { CLAW_DBF_TEXT(4, trace, "SPend_rd"); return; } clear_bit(0, (void *)&p_ch->IO_active); claw_clearbit_busy(TB_RETRY, dev); if (test_and_set_bit(CLAW_BH_ACTIVE, (void *)&p_ch->flag_a) == 0) tasklet_schedule(&p_ch->tasklet); else CLAW_DBF_TEXT(4, trace, "RdBHAct"); CLAW_DBF_TEXT(4, trace, "RdIRQXit"); return; case CLAW_START_WRITE: if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) { dev_info(&cdev->dev, "%s: Unit Check Occurred in " "write channel\n", dev->name); clear_bit(0, (void *)&p_ch->IO_active); if (p_ch->irb->ecw[0] & 0x80) { dev_info(&cdev->dev, "%s: Resetting Event " "occurred:\n", dev->name); init_timer(&p_ch->timer); p_ch->timer.function = (void *)claw_write_retry; p_ch->timer.data = (unsigned long)p_ch; p_ch->timer.expires = jiffies + 10*HZ; add_timer(&p_ch->timer); dev_info(&cdev->dev, "%s: write connection " "restarting\n", dev->name); } CLAW_DBF_TEXT(4, trace, "rstrtwrt"); return; } if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) { clear_bit(0, (void *)&p_ch->IO_active); dev_info(&cdev->dev, "%s: Unit Exception " "occurred in write channel\n", dev->name); } if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) || (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) || (p_ch->irb->scsw.cmd.stctl == (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) { CLAW_DBF_TEXT(4, trace, "writeUE"); return; } clear_bit(0, (void *)&p_ch->IO_active); if (claw_test_and_setbit_busy(TB_TX, dev) == 0) { claw_write_next(p_ch); claw_clearbit_busy(TB_TX, dev); claw_clear_busy(dev); } p_ch_r = (struct chbk *)&privptr->channel[READ_CHANNEL]; if (test_and_set_bit(CLAW_BH_ACTIVE, (void *)&p_ch_r->flag_a) == 0) tasklet_schedule(&p_ch_r->tasklet); CLAW_DBF_TEXT(4, trace, "StWtExit"); return; default: dev_warn(&cdev->dev, "The CLAW device for %s received an unexpected IRQ\n", dev->name); CLAW_DBF_TEXT(2, trace, "badIRQ"); return; } } /* end of claw_irq_handler */ /*-------------------------------------------------------------------* * claw_irq_tasklet * * * *--------------------------------------------------------------------*/ static void claw_irq_tasklet ( unsigned long data ) { struct chbk * p_ch; struct net_device *dev; p_ch = (struct chbk *) data; dev = (struct net_device *)p_ch->ndev; CLAW_DBF_TEXT(4, trace, "IRQtask"); unpack_read(dev); clear_bit(CLAW_BH_ACTIVE, (void *)&p_ch->flag_a); CLAW_DBF_TEXT(4, trace, "TskletXt"); return; } /* end of claw_irq_bh */ /*-------------------------------------------------------------------* * claw_release * * * *--------------------------------------------------------------------*/ static int claw_release(struct net_device *dev) { int rc; int i; unsigned long saveflags; unsigned long parm; struct claw_privbk *privptr; DECLARE_WAITQUEUE(wait, current); struct ccwbk* p_this_ccw; struct ccwbk* p_buf; if (!dev) return 0; privptr = (struct claw_privbk *)dev->ml_priv; if (!privptr) return 0; CLAW_DBF_TEXT(4, trace, "release"); privptr->release_pend=1; claw_setbit_busy(TB_STOP,dev); for ( i = 1; i >=0 ; i--) { spin_lock_irqsave( get_ccwdev_lock(privptr->channel[i].cdev), saveflags); /* del_timer(&privptr->channel[READ_CHANNEL].timer); */ privptr->channel[i].claw_state = CLAW_STOP; privptr->channel[i].IO_active = 0; parm = (unsigned long) &privptr->channel[i]; if (i == WRITE_CHANNEL) claw_purge_skb_queue( &privptr->channel[WRITE_CHANNEL].collect_queue); rc = ccw_device_halt (privptr->channel[i].cdev, parm); if (privptr->system_validate_comp==0x00) /* never opened? */ init_waitqueue_head(&privptr->channel[i].wait); add_wait_queue(&privptr->channel[i].wait, &wait); set_current_state(TASK_INTERRUPTIBLE); spin_unlock_irqrestore( get_ccwdev_lock(privptr->channel[i].cdev), saveflags); schedule(); set_current_state(TASK_RUNNING); remove_wait_queue(&privptr->channel[i].wait, &wait); if (rc != 0) { ccw_check_return_code(privptr->channel[i].cdev, rc); } } if (privptr->pk_skb != NULL) { dev_kfree_skb_any(privptr->pk_skb); privptr->pk_skb = NULL; } if(privptr->buffs_alloc != 1) { CLAW_DBF_TEXT(4, trace, "none2fre"); return 0; } CLAW_DBF_TEXT(4, trace, "freebufs"); if (privptr->p_buff_ccw != NULL) { free_pages((unsigned long)privptr->p_buff_ccw, (int)pages_to_order_of_mag(privptr->p_buff_ccw_num)); } CLAW_DBF_TEXT(4, trace, "freeread"); if (privptr->p_env->read_size < PAGE_SIZE) { if (privptr->p_buff_read != NULL) { free_pages((unsigned long)privptr->p_buff_read, (int)pages_to_order_of_mag(privptr->p_buff_read_num)); } } else { p_buf=privptr->p_read_active_first; while (p_buf!=NULL) { free_pages((unsigned long)p_buf->p_buffer, (int)pages_to_order_of_mag( privptr->p_buff_pages_perread )); p_buf=p_buf->next; } } CLAW_DBF_TEXT(4, trace, "freewrit"); if (privptr->p_env->write_size < PAGE_SIZE ) { free_pages((unsigned long)privptr->p_buff_write, (int)pages_to_order_of_mag(privptr->p_buff_write_num)); } else { p_buf=privptr->p_write_active_first; while (p_buf!=NULL) { free_pages((unsigned long)p_buf->p_buffer, (int)pages_to_order_of_mag( privptr->p_buff_pages_perwrite )); p_buf=p_buf->next; } } CLAW_DBF_TEXT(4, trace, "clearptr"); privptr->buffs_alloc = 0; privptr->p_buff_ccw=NULL; privptr->p_buff_read=NULL; privptr->p_buff_write=NULL; privptr->system_validate_comp=0; privptr->release_pend=0; /* Remove any writes that were pending and reset all reads */ p_this_ccw=privptr->p_read_active_first; while (p_this_ccw!=NULL) { p_this_ccw->header.length=0xffff; p_this_ccw->header.opcode=0xff; p_this_ccw->header.flag=0x00; p_this_ccw=p_this_ccw->next; } while (privptr->p_write_active_first!=NULL) { p_this_ccw=privptr->p_write_active_first; p_this_ccw->header.flag=CLAW_PENDING; privptr->p_write_active_first=p_this_ccw->next; p_this_ccw->next=privptr->p_write_free_chain; privptr->p_write_free_chain=p_this_ccw; ++privptr->write_free_count; } privptr->p_write_active_last=NULL; privptr->mtc_logical_link = -1; privptr->mtc_skipping = 1; privptr->mtc_offset=0; if (((privptr->channel[READ_CHANNEL].last_dstat | privptr->channel[WRITE_CHANNEL].last_dstat) & ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) { dev_warn(&privptr->channel[READ_CHANNEL].cdev->dev, "Deactivating %s completed with incorrect" " subchannel status " "(read %02x, write %02x)\n", dev->name, privptr->channel[READ_CHANNEL].last_dstat, privptr->channel[WRITE_CHANNEL].last_dstat); CLAW_DBF_TEXT(2, trace, "badclose"); } CLAW_DBF_TEXT(4, trace, "rlsexit"); return 0; } /* end of claw_release */ /*-------------------------------------------------------------------* * claw_write_retry * * * *--------------------------------------------------------------------*/ static void claw_write_retry ( struct chbk *p_ch ) { struct net_device *dev=p_ch->ndev; CLAW_DBF_TEXT(4, trace, "w_retry"); if (p_ch->claw_state == CLAW_STOP) { return; } claw_strt_out_IO( dev ); CLAW_DBF_TEXT(4, trace, "rtry_xit"); return; } /* end of claw_write_retry */ /*-------------------------------------------------------------------* * claw_write_next * * * *--------------------------------------------------------------------*/ static void claw_write_next ( struct chbk * p_ch ) { struct net_device *dev; struct claw_privbk *privptr=NULL; struct sk_buff *pk_skb; CLAW_DBF_TEXT(4, trace, "claw_wrt"); if (p_ch->claw_state == CLAW_STOP) return; dev = (struct net_device *) p_ch->ndev; privptr = (struct claw_privbk *) dev->ml_priv; claw_free_wrt_buf( dev ); if ((privptr->write_free_count > 0) && !skb_queue_empty(&p_ch->collect_queue)) { pk_skb = claw_pack_skb(privptr); while (pk_skb != NULL) { claw_hw_tx(pk_skb, dev, 1); if (privptr->write_free_count > 0) { pk_skb = claw_pack_skb(privptr); } else pk_skb = NULL; } } if (privptr->p_write_active_first!=NULL) { claw_strt_out_IO(dev); } return; } /* end of claw_write_next */ /*-------------------------------------------------------------------* * * * claw_timer * *--------------------------------------------------------------------*/ static void claw_timer ( struct chbk * p_ch ) { CLAW_DBF_TEXT(4, trace, "timer"); p_ch->flag |= CLAW_TIMER; wake_up(&p_ch->wait); return; } /* end of claw_timer */ /* * * functions */ /*-------------------------------------------------------------------* * * * pages_to_order_of_mag * * * * takes a number of pages from 1 to 512 and returns the * * log(num_pages)/log(2) get_free_pages() needs a base 2 order * * of magnitude get_free_pages() has an upper order of 9 * *--------------------------------------------------------------------*/ static int pages_to_order_of_mag(int num_of_pages) { int order_of_mag=1; /* assume 2 pages */ int nump; CLAW_DBF_TEXT_(5, trace, "pages%d", num_of_pages); if (num_of_pages == 1) {return 0; } /* magnitude of 0 = 1 page */ /* 512 pages = 2Meg on 4k page systems */ if (num_of_pages >= 512) {return 9; } /* we have two or more pages order is at least 1 */ for (nump=2 ;nump <= 512;nump*=2) { if (num_of_pages <= nump) break; order_of_mag +=1; } if (order_of_mag > 9) { order_of_mag = 9; } /* I know it's paranoid */ CLAW_DBF_TEXT_(5, trace, "mag%d", order_of_mag); return order_of_mag; } /*-------------------------------------------------------------------* * * * add_claw_reads * * * *--------------------------------------------------------------------*/ static int add_claw_reads(struct net_device *dev, struct ccwbk* p_first, struct ccwbk* p_last) { struct claw_privbk *privptr; struct ccw1 temp_ccw; struct endccw * p_end; CLAW_DBF_TEXT(4, trace, "addreads"); privptr = dev->ml_priv; p_end = privptr->p_end_ccw; /* first CCW and last CCW contains a new set of read channel programs * to apend the running channel programs */ if ( p_first==NULL) { CLAW_DBF_TEXT(4, trace, "addexit"); return 0; } /* set up ending CCW sequence for this segment */ if (p_end->read1) { p_end->read1=0x00; /* second ending CCW is now active */ /* reset ending CCWs and setup TIC CCWs */ p_end->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF; p_end->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP; p_last->r_TIC_1.cda =(__u32)__pa(&p_end->read2_nop1); p_last->r_TIC_2.cda =(__u32)__pa(&p_end->read2_nop1); p_end->read2_nop2.cda=0; p_end->read2_nop2.count=1; } else { p_end->read1=0x01; /* first ending CCW is now active */ /* reset ending CCWs and setup TIC CCWs */ p_end->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF; p_end->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP; p_last->r_TIC_1.cda = (__u32)__pa(&p_end->read1_nop1); p_last->r_TIC_2.cda = (__u32)__pa(&p_end->read1_nop1); p_end->read1_nop2.cda=0; p_end->read1_nop2.count=1; } if ( privptr-> p_read_active_first ==NULL ) { privptr->p_read_active_first = p_first; /* set new first */ privptr->p_read_active_last = p_last; /* set new last */ } else { /* set up TIC ccw */ temp_ccw.cda= (__u32)__pa(&p_first->read); temp_ccw.count=0; temp_ccw.flags=0; temp_ccw.cmd_code = CCW_CLAW_CMD_TIC; if (p_end->read1) { /* first set of CCW's is chained to the new read */ /* chain, so the second set is chained to the active chain. */ /* Therefore modify the second set to point to the new */ /* read chain set up TIC CCWs */ /* make sure we update the CCW so channel doesn't fetch it */ /* when it's only half done */ memcpy( &p_end->read2_nop2, &temp_ccw , sizeof(struct ccw1)); privptr->p_read_active_last->r_TIC_1.cda= (__u32)__pa(&p_first->read); privptr->p_read_active_last->r_TIC_2.cda= (__u32)__pa(&p_first->read); } else { /* make sure we update the CCW so channel doesn't */ /* fetch it when it is only half done */ memcpy( &p_end->read1_nop2, &temp_ccw , sizeof(struct ccw1)); privptr->p_read_active_last->r_TIC_1.cda= (__u32)__pa(&p_first->read); privptr->p_read_active_last->r_TIC_2.cda= (__u32)__pa(&p_first->read); } /* chain in new set of blocks */ privptr->p_read_active_last->next = p_first; privptr->p_read_active_last=p_last; } /* end of if ( privptr-> p_read_active_first ==NULL) */ CLAW_DBF_TEXT(4, trace, "addexit"); return 0; } /* end of add_claw_reads */ /*-------------------------------------------------------------------* * ccw_check_return_code * * * *-------------------------------------------------------------------*/ static void ccw_check_return_code(struct ccw_device *cdev, int return_code) { CLAW_DBF_TEXT(4, trace, "ccwret"); if (return_code != 0) { switch (return_code) { case -EBUSY: /* BUSY is a transient state no action needed */ break; case -ENODEV: dev_err(&cdev->dev, "The remote channel adapter is not" " available\n"); break; case -EINVAL: dev_err(&cdev->dev, "The status of the remote channel adapter" " is not valid\n"); break; default: dev_err(&cdev->dev, "The common device layer" " returned error code %d\n", return_code); } } CLAW_DBF_TEXT(4, trace, "ccwret"); } /* end of ccw_check_return_code */ /*-------------------------------------------------------------------* * ccw_check_unit_check * *--------------------------------------------------------------------*/ static void ccw_check_unit_check(struct chbk * p_ch, unsigned char sense ) { struct net_device *ndev = p_ch->ndev; struct device *dev = &p_ch->cdev->dev; CLAW_DBF_TEXT(4, trace, "unitchek"); dev_warn(dev, "The communication peer of %s disconnected\n", ndev->name); if (sense & 0x40) { if (sense & 0x01) { dev_warn(dev, "The remote channel adapter for" " %s has been reset\n", ndev->name); } } else if (sense & 0x20) { if (sense & 0x04) { dev_warn(dev, "A data streaming timeout occurred" " for %s\n", ndev->name); } else if (sense & 0x10) { dev_warn(dev, "The remote channel adapter for %s" " is faulty\n", ndev->name); } else { dev_warn(dev, "A data transfer parity error occurred" " for %s\n", ndev->name); } } else if (sense & 0x10) { dev_warn(dev, "A read data parity error occurred" " for %s\n", ndev->name); } } /* end of ccw_check_unit_check */ /*-------------------------------------------------------------------* * find_link * *--------------------------------------------------------------------*/ static int find_link(struct net_device *dev, char *host_name, char *ws_name ) { struct claw_privbk *privptr; struct claw_env *p_env; int rc=0; CLAW_DBF_TEXT(2, setup, "findlink"); privptr = dev->ml_priv; p_env=privptr->p_env; switch (p_env->packing) { case PACKING_ASK: if ((memcmp(WS_APPL_NAME_PACKED, host_name, 8)!=0) || (memcmp(WS_APPL_NAME_PACKED, ws_name, 8)!=0 )) rc = EINVAL; break; case DO_PACKED: case PACK_SEND: if ((memcmp(WS_APPL_NAME_IP_NAME, host_name, 8)!=0) || (memcmp(WS_APPL_NAME_IP_NAME, ws_name, 8)!=0 )) rc = EINVAL; break; default: if ((memcmp(HOST_APPL_NAME, host_name, 8)!=0) || (memcmp(p_env->api_type , ws_name, 8)!=0)) rc = EINVAL; break; } return rc; } /* end of find_link */ /*-------------------------------------------------------------------* * claw_hw_tx * * * * * *-------------------------------------------------------------------*/ static int claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid) { int rc=0; struct claw_privbk *privptr; struct ccwbk *p_this_ccw; struct ccwbk *p_first_ccw; struct ccwbk *p_last_ccw; __u32 numBuffers; signed long len_of_data; unsigned long bytesInThisBuffer; unsigned char *pDataAddress; struct endccw *pEnd; struct ccw1 tempCCW; struct claw_env *p_env; struct clawph *pk_head; struct chbk *ch; CLAW_DBF_TEXT(4, trace, "hw_tx"); privptr = (struct claw_privbk *)(dev->ml_priv); p_env =privptr->p_env; claw_free_wrt_buf(dev); /* Clean up free chain if posible */ /* scan the write queue to free any completed write packets */ p_first_ccw=NULL; p_last_ccw=NULL; if ((p_env->packing >= PACK_SEND) && (skb->cb[1] != 'P')) { skb_push(skb,sizeof(struct clawph)); pk_head=(struct clawph *)skb->data; pk_head->len=skb->len-sizeof(struct clawph); if (pk_head->len%4) { pk_head->len+= 4-(pk_head->len%4); skb_pad(skb,4-(pk_head->len%4)); skb_put(skb,4-(pk_head->len%4)); } if (p_env->packing == DO_PACKED) pk_head->link_num = linkid; else pk_head->link_num = 0; pk_head->flag = 0x00; skb_pad(skb,4); skb->cb[1] = 'P'; } if (linkid == 0) { if (claw_check_busy(dev)) { if (privptr->write_free_count!=0) { claw_clear_busy(dev); } else { claw_strt_out_IO(dev ); claw_free_wrt_buf( dev ); if (privptr->write_free_count==0) { ch = &privptr->channel[WRITE_CHANNEL]; atomic_inc(&skb->users); skb_queue_tail(&ch->collect_queue, skb); goto Done; } else { claw_clear_busy(dev); } } } /* tx lock */ if (claw_test_and_setbit_busy(TB_TX,dev)) { /* set to busy */ ch = &privptr->channel[WRITE_CHANNEL]; atomic_inc(&skb->users); skb_queue_tail(&ch->collect_queue, skb); claw_strt_out_IO(dev ); rc=-EBUSY; goto Done2; } } /* See how many write buffers are required to hold this data */ numBuffers = DIV_ROUND_UP(skb->len, privptr->p_env->write_size); /* If that number of buffers isn't available, give up for now */ if (privptr->write_free_count < numBuffers || privptr->p_write_free_chain == NULL ) { claw_setbit_busy(TB_NOBUFFER,dev); ch = &privptr->channel[WRITE_CHANNEL]; atomic_inc(&skb->users); skb_queue_tail(&ch->collect_queue, skb); CLAW_DBF_TEXT(2, trace, "clawbusy"); goto Done2; } pDataAddress=skb->data; len_of_data=skb->len; while (len_of_data > 0) { p_this_ccw=privptr->p_write_free_chain; /* get a block */ if (p_this_ccw == NULL) { /* lost the race */ ch = &privptr->channel[WRITE_CHANNEL]; atomic_inc(&skb->users); skb_queue_tail(&ch->collect_queue, skb); goto Done2; } privptr->p_write_free_chain=p_this_ccw->next; p_this_ccw->next=NULL; --privptr->write_free_count; /* -1 */ if (len_of_data >= privptr->p_env->write_size) bytesInThisBuffer = privptr->p_env->write_size; else bytesInThisBuffer = len_of_data; memcpy( p_this_ccw->p_buffer,pDataAddress, bytesInThisBuffer); len_of_data-=bytesInThisBuffer; pDataAddress+=(unsigned long)bytesInThisBuffer; /* setup write CCW */ p_this_ccw->write.cmd_code = (linkid * 8) +1; if (len_of_data>0) { p_this_ccw->write.cmd_code+=MORE_to_COME_FLAG; } p_this_ccw->write.count=bytesInThisBuffer; /* now add to end of this chain */ if (p_first_ccw==NULL) { p_first_ccw=p_this_ccw; } if (p_last_ccw!=NULL) { p_last_ccw->next=p_this_ccw; /* set up TIC ccws */ p_last_ccw->w_TIC_1.cda= (__u32)__pa(&p_this_ccw->write); } p_last_ccw=p_this_ccw; /* save new last block */ } /* FirstCCW and LastCCW now contain a new set of write channel * programs to append to the running channel program */ if (p_first_ccw!=NULL) { /* setup ending ccw sequence for this segment */ pEnd=privptr->p_end_ccw; if (pEnd->write1) { pEnd->write1=0x00; /* second end ccw is now active */ /* set up Tic CCWs */ p_last_ccw->w_TIC_1.cda= (__u32)__pa(&pEnd->write2_nop1); pEnd->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF; pEnd->write2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP; pEnd->write2_nop2.cda=0; pEnd->write2_nop2.count=1; } else { /* end of if (pEnd->write1)*/ pEnd->write1=0x01; /* first end ccw is now active */ /* set up Tic CCWs */ p_last_ccw->w_TIC_1.cda= (__u32)__pa(&pEnd->write1_nop1); pEnd->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF; pEnd->write1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP; pEnd->write1_nop2.cda=0; pEnd->write1_nop2.count=1; } /* end if if (pEnd->write1) */ if (privptr->p_write_active_first==NULL ) { privptr->p_write_active_first=p_first_ccw; privptr->p_write_active_last=p_last_ccw; } else { /* set up Tic CCWs */ tempCCW.cda=(__u32)__pa(&p_first_ccw->write); tempCCW.count=0; tempCCW.flags=0; tempCCW.cmd_code=CCW_CLAW_CMD_TIC; if (pEnd->write1) { /* * first set of ending CCW's is chained to the new write * chain, so the second set is chained to the active chain * Therefore modify the second set to point the new write chain. * make sure we update the CCW atomically * so channel does not fetch it when it's only half done */ memcpy( &pEnd->write2_nop2, &tempCCW , sizeof(struct ccw1)); privptr->p_write_active_last->w_TIC_1.cda= (__u32)__pa(&p_first_ccw->write); } else { /*make sure we update the CCW atomically *so channel does not fetch it when it's only half done */ memcpy(&pEnd->write1_nop2, &tempCCW , sizeof(struct ccw1)); privptr->p_write_active_last->w_TIC_1.cda= (__u32)__pa(&p_first_ccw->write); } /* end if if (pEnd->write1) */ privptr->p_write_active_last->next=p_first_ccw; privptr->p_write_active_last=p_last_ccw; } } /* endif (p_first_ccw!=NULL) */ dev_kfree_skb_any(skb); claw_strt_out_IO(dev ); /* if write free count is zero , set NOBUFFER */ if (privptr->write_free_count==0) { claw_setbit_busy(TB_NOBUFFER,dev); } Done2: claw_clearbit_busy(TB_TX,dev); Done: return(rc); } /* end of claw_hw_tx */ /*-------------------------------------------------------------------* * * * init_ccw_bk * * * *--------------------------------------------------------------------*/ static int init_ccw_bk(struct net_device *dev) { __u32 ccw_blocks_required; __u32 ccw_blocks_perpage; __u32 ccw_pages_required; __u32 claw_reads_perpage=1; __u32 claw_read_pages; __u32 claw_writes_perpage=1; __u32 claw_write_pages; void *p_buff=NULL; struct ccwbk*p_free_chain; struct ccwbk*p_buf; struct ccwbk*p_last_CCWB; struct ccwbk*p_first_CCWB; struct endccw *p_endccw=NULL; addr_t real_address; struct claw_privbk *privptr = dev->ml_priv; struct clawh *pClawH=NULL; addr_t real_TIC_address; int i,j; CLAW_DBF_TEXT(4, trace, "init_ccw"); /* initialize statistics field */ privptr->active_link_ID=0; /* initialize ccwbk pointers */ privptr->p_write_free_chain=NULL; /* pointer to free ccw chain*/ privptr->p_write_active_first=NULL; /* pointer to the first write ccw*/ privptr->p_write_active_last=NULL; /* pointer to the last write ccw*/ privptr->p_read_active_first=NULL; /* pointer to the first read ccw*/ privptr->p_read_active_last=NULL; /* pointer to the last read ccw */ privptr->p_end_ccw=NULL; /* pointer to ending ccw */ privptr->p_claw_signal_blk=NULL; /* pointer to signal block */ privptr->buffs_alloc = 0; memset(&privptr->end_ccw, 0x00, sizeof(struct endccw)); memset(&privptr->ctl_bk, 0x00, sizeof(struct clawctl)); /* initialize free write ccwbk counter */ privptr->write_free_count=0; /* number of free bufs on write chain */ p_last_CCWB = NULL; p_first_CCWB= NULL; /* * We need 1 CCW block for each read buffer, 1 for each * write buffer, plus 1 for ClawSignalBlock */ ccw_blocks_required = privptr->p_env->read_buffers+privptr->p_env->write_buffers+1; /* * compute number of CCW blocks that will fit in a page */ ccw_blocks_perpage= PAGE_SIZE / CCWBK_SIZE; ccw_pages_required= DIV_ROUND_UP(ccw_blocks_required, ccw_blocks_perpage); /* * read and write sizes are set by 2 constants in claw.h * 4k and 32k. Unpacked values other than 4k are not going to * provide good performance. With packing buffers support 32k * buffers are used. */ if (privptr->p_env->read_size < PAGE_SIZE) { claw_reads_perpage = PAGE_SIZE / privptr->p_env->read_size; claw_read_pages = DIV_ROUND_UP(privptr->p_env->read_buffers, claw_reads_perpage); } else { /* > or equal */ privptr->p_buff_pages_perread = DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE); claw_read_pages = privptr->p_env->read_buffers * privptr->p_buff_pages_perread; } if (privptr->p_env->write_size < PAGE_SIZE) { claw_writes_perpage = PAGE_SIZE / privptr->p_env->write_size; claw_write_pages = DIV_ROUND_UP(privptr->p_env->write_buffers, claw_writes_perpage); } else { /* > or equal */ privptr->p_buff_pages_perwrite = DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE); claw_write_pages = privptr->p_env->write_buffers * privptr->p_buff_pages_perwrite; } /* * allocate ccw_pages_required */ if (privptr->p_buff_ccw==NULL) { privptr->p_buff_ccw= (void *)__get_free_pages(__GFP_DMA, (int)pages_to_order_of_mag(ccw_pages_required )); if (privptr->p_buff_ccw==NULL) { return -ENOMEM; } privptr->p_buff_ccw_num=ccw_pages_required; } memset(privptr->p_buff_ccw, 0x00, privptr->p_buff_ccw_num * PAGE_SIZE); /* * obtain ending ccw block address * */ privptr->p_end_ccw = (struct endccw *)&privptr->end_ccw; real_address = (__u32)__pa(privptr->p_end_ccw); /* Initialize ending CCW block */ p_endccw=privptr->p_end_ccw; p_endccw->real=real_address; p_endccw->write1=0x00; p_endccw->read1=0x00; /* write1_nop1 */ p_endccw->write1_nop1.cmd_code = CCW_CLAW_CMD_NOP; p_endccw->write1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC; p_endccw->write1_nop1.count = 1; p_endccw->write1_nop1.cda = 0; /* write1_nop2 */ p_endccw->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF; p_endccw->write1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP; p_endccw->write1_nop2.count = 1; p_endccw->write1_nop2.cda = 0; /* write2_nop1 */ p_endccw->write2_nop1.cmd_code = CCW_CLAW_CMD_NOP; p_endccw->write2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC; p_endccw->write2_nop1.count = 1; p_endccw->write2_nop1.cda = 0; /* write2_nop2 */ p_endccw->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF; p_endccw->write2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP; p_endccw->write2_nop2.count = 1; p_endccw->write2_nop2.cda = 0; /* read1_nop1 */ p_endccw->read1_nop1.cmd_code = CCW_CLAW_CMD_NOP; p_endccw->read1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC; p_endccw->read1_nop1.count = 1; p_endccw->read1_nop1.cda = 0; /* read1_nop2 */ p_endccw->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF; p_endccw->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP; p_endccw->read1_nop2.count = 1; p_endccw->read1_nop2.cda = 0; /* read2_nop1 */ p_endccw->read2_nop1.cmd_code = CCW_CLAW_CMD_NOP; p_endccw->read2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC; p_endccw->read2_nop1.count = 1; p_endccw->read2_nop1.cda = 0; /* read2_nop2 */ p_endccw->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF; p_endccw->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP; p_endccw->read2_nop2.count = 1; p_endccw->read2_nop2.cda = 0; /* * Build a chain of CCWs * */ p_buff=privptr->p_buff_ccw; p_free_chain=NULL; for (i=0 ; i < ccw_pages_required; i++ ) { real_address = (__u32)__pa(p_buff); p_buf=p_buff; for (j=0 ; j < ccw_blocks_perpage ; j++) { p_buf->next = p_free_chain; p_free_chain = p_buf; p_buf->real=(__u32)__pa(p_buf); ++p_buf; } p_buff+=PAGE_SIZE; } /* * Initialize ClawSignalBlock * */ if (privptr->p_claw_signal_blk==NULL) { privptr->p_claw_signal_blk=p_free_chain; p_free_chain=p_free_chain->next; pClawH=(struct clawh *)privptr->p_claw_signal_blk; pClawH->length=0xffff; pClawH->opcode=0xff; pClawH->flag=CLAW_BUSY; } /* * allocate write_pages_required and add to free chain */ if (privptr->p_buff_write==NULL) { if (privptr->p_env->write_size < PAGE_SIZE) { privptr->p_buff_write= (void *)__get_free_pages(__GFP_DMA, (int)pages_to_order_of_mag(claw_write_pages )); if (privptr->p_buff_write==NULL) { privptr->p_buff_ccw=NULL; return -ENOMEM; } /* * Build CLAW write free chain * */ memset(privptr->p_buff_write, 0x00, ccw_pages_required * PAGE_SIZE); privptr->p_write_free_chain=NULL; p_buff=privptr->p_buff_write; for (i=0 ; i< privptr->p_env->write_buffers ; i++) { p_buf = p_free_chain; /* get a CCW */ p_free_chain = p_buf->next; p_buf->next =privptr->p_write_free_chain; privptr->p_write_free_chain = p_buf; p_buf-> p_buffer = (struct clawbuf *)p_buff; p_buf-> write.cda = (__u32)__pa(p_buff); p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC; p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF; p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC; p_buf-> w_read_FF.count = 1; p_buf-> w_read_FF.cda = (__u32)__pa(&p_buf-> header.flag); p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC; p_buf-> w_TIC_1.flags = 0; p_buf-> w_TIC_1.count = 0; if (((unsigned long)p_buff + privptr->p_env->write_size) >= ((unsigned long)(p_buff+2* (privptr->p_env->write_size) - 1) & PAGE_MASK)) { p_buff = p_buff+privptr->p_env->write_size; } } } else /* Buffers are => PAGE_SIZE. 1 buff per get_free_pages */ { privptr->p_write_free_chain=NULL; for (i = 0; i< privptr->p_env->write_buffers ; i++) { p_buff=(void *)__get_free_pages(__GFP_DMA, (int)pages_to_order_of_mag( privptr->p_buff_pages_perwrite) ); if (p_buff==NULL) { free_pages((unsigned long)privptr->p_buff_ccw, (int)pages_to_order_of_mag( privptr->p_buff_ccw_num)); privptr->p_buff_ccw=NULL; p_buf=privptr->p_buff_write; while (p_buf!=NULL) { free_pages((unsigned long) p_buf->p_buffer, (int)pages_to_order_of_mag( privptr->p_buff_pages_perwrite)); p_buf=p_buf->next; } return -ENOMEM; } /* Error on get_pages */ memset(p_buff, 0x00, privptr->p_env->write_size ); p_buf = p_free_chain; p_free_chain = p_buf->next; p_buf->next = privptr->p_write_free_chain; privptr->p_write_free_chain = p_buf; privptr->p_buff_write = p_buf; p_buf->p_buffer=(struct clawbuf *)p_buff; p_buf-> write.cda = (__u32)__pa(p_buff); p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC; p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF; p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC; p_buf-> w_read_FF.count = 1; p_buf-> w_read_FF.cda = (__u32)__pa(&p_buf-> header.flag); p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC; p_buf-> w_TIC_1.flags = 0; p_buf-> w_TIC_1.count = 0; } /* for all write_buffers */ } /* else buffers are PAGE_SIZE or bigger */ } privptr->p_buff_write_num=claw_write_pages; privptr->write_free_count=privptr->p_env->write_buffers; /* * allocate read_pages_required and chain to free chain */ if (privptr->p_buff_read==NULL) { if (privptr->p_env->read_size < PAGE_SIZE) { privptr->p_buff_read= (void *)__get_free_pages(__GFP_DMA, (int)pages_to_order_of_mag(claw_read_pages) ); if (privptr->p_buff_read==NULL) { free_pages((unsigned long)privptr->p_buff_ccw, (int)pages_to_order_of_mag( privptr->p_buff_ccw_num)); /* free the write pages size is < page size */ free_pages((unsigned long)privptr->p_buff_write, (int)pages_to_order_of_mag( privptr->p_buff_write_num)); privptr->p_buff_ccw=NULL; privptr->p_buff_write=NULL; return -ENOMEM; } memset(privptr->p_buff_read, 0x00, claw_read_pages * PAGE_SIZE); privptr->p_buff_read_num=claw_read_pages; /* * Build CLAW read free chain * */ p_buff=privptr->p_buff_read; for (i=0 ; i< privptr->p_env->read_buffers ; i++) { p_buf = p_free_chain; p_free_chain = p_buf->next; if (p_last_CCWB==NULL) { p_buf->next=NULL; real_TIC_address=0; p_last_CCWB=p_buf; } else { p_buf->next=p_first_CCWB; real_TIC_address= (__u32)__pa(&p_first_CCWB -> read ); } p_first_CCWB=p_buf; p_buf->p_buffer=(struct clawbuf *)p_buff; /* initialize read command */ p_buf-> read.cmd_code = CCW_CLAW_CMD_READ; p_buf-> read.cda = (__u32)__pa(p_buff); p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC; p_buf-> read.count = privptr->p_env->read_size; /* initialize read_h command */ p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER; p_buf-> read_h.cda = (__u32)__pa(&(p_buf->header)); p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC; p_buf-> read_h.count = sizeof(struct clawh); /* initialize Signal command */ p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD; p_buf-> signal.cda = (__u32)__pa(&(pClawH->flag)); p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC; p_buf-> signal.count = 1; /* initialize r_TIC_1 command */ p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC; p_buf-> r_TIC_1.cda = (__u32)real_TIC_address; p_buf-> r_TIC_1.flags = 0; p_buf-> r_TIC_1.count = 0; /* initialize r_read_FF command */ p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF; p_buf-> r_read_FF.cda = (__u32)__pa(&(pClawH->flag)); p_buf-> r_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI; p_buf-> r_read_FF.count = 1; /* initialize r_TIC_2 */ memcpy(&p_buf->r_TIC_2, &p_buf->r_TIC_1, sizeof(struct ccw1)); /* initialize Header */ p_buf->header.length=0xffff; p_buf->header.opcode=0xff; p_buf->header.flag=CLAW_PENDING; if (((unsigned long)p_buff+privptr->p_env->read_size) >= ((unsigned long)(p_buff+2*(privptr->p_env->read_size) -1) & PAGE_MASK)) { p_buff= p_buff+privptr->p_env->read_size; } else { p_buff= (void *)((unsigned long) (p_buff+2*(privptr->p_env->read_size)-1) & PAGE_MASK) ; } } /* for read_buffers */ } /* read_size < PAGE_SIZE */ else { /* read Size >= PAGE_SIZE */ for (i=0 ; i< privptr->p_env->read_buffers ; i++) { p_buff = (void *)__get_free_pages(__GFP_DMA, (int)pages_to_order_of_mag( privptr->p_buff_pages_perread)); if (p_buff==NULL) { free_pages((unsigned long)privptr->p_buff_ccw, (int)pages_to_order_of_mag(privptr-> p_buff_ccw_num)); /* free the write pages */ p_buf=privptr->p_buff_write; while (p_buf!=NULL) { free_pages( (unsigned long)p_buf->p_buffer, (int)pages_to_order_of_mag( privptr->p_buff_pages_perwrite)); p_buf=p_buf->next; } /* free any read pages already alloc */ p_buf=privptr->p_buff_read; while (p_buf!=NULL) { free_pages( (unsigned long)p_buf->p_buffer, (int)pages_to_order_of_mag( privptr->p_buff_pages_perread)); p_buf=p_buf->next; } privptr->p_buff_ccw=NULL; privptr->p_buff_write=NULL; return -ENOMEM; } memset(p_buff, 0x00, privptr->p_env->read_size); p_buf = p_free_chain; privptr->p_buff_read = p_buf; p_free_chain = p_buf->next; if (p_last_CCWB==NULL) { p_buf->next=NULL; real_TIC_address=0; p_last_CCWB=p_buf; } else { p_buf->next=p_first_CCWB; real_TIC_address= (addr_t)__pa( &p_first_CCWB -> read ); } p_first_CCWB=p_buf; /* save buff address */ p_buf->p_buffer=(struct clawbuf *)p_buff; /* initialize read command */ p_buf-> read.cmd_code = CCW_CLAW_CMD_READ; p_buf-> read.cda = (__u32)__pa(p_buff); p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC; p_buf-> read.count = privptr->p_env->read_size; /* initialize read_h command */ p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER; p_buf-> read_h.cda = (__u32)__pa(&(p_buf->header)); p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC; p_buf-> read_h.count = sizeof(struct clawh); /* initialize Signal command */ p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD; p_buf-> signal.cda = (__u32)__pa(&(pClawH->flag)); p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC; p_buf-> signal.count = 1; /* initialize r_TIC_1 command */ p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC; p_buf-> r_TIC_1.cda = (__u32)real_TIC_address; p_buf-> r_TIC_1.flags = 0; p_buf-> r_TIC_1.count = 0; /* initialize r_read_FF command */ p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF; p_buf-> r_read_FF.cda = (__u32)__pa(&(pClawH->flag)); p_buf-> r_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI; p_buf-> r_read_FF.count = 1; /* initialize r_TIC_2 */ memcpy(&p_buf->r_TIC_2, &p_buf->r_TIC_1, sizeof(struct ccw1)); /* initialize Header */ p_buf->header.length=0xffff; p_buf->header.opcode=0xff; p_buf->header.flag=CLAW_PENDING; } /* For read_buffers */ } /* read_size >= PAGE_SIZE */ } /* pBuffread = NULL */ add_claw_reads( dev ,p_first_CCWB , p_last_CCWB); privptr->buffs_alloc = 1; return 0; } /* end of init_ccw_bk */ /*-------------------------------------------------------------------* * * * probe_error * * * *--------------------------------------------------------------------*/ static void probe_error( struct ccwgroup_device *cgdev) { struct claw_privbk *privptr; CLAW_DBF_TEXT(4, trace, "proberr"); privptr = dev_get_drvdata(&cgdev->dev); if (privptr != NULL) { dev_set_drvdata(&cgdev->dev, NULL); kfree(privptr->p_env); kfree(privptr->p_mtc_envelope); kfree(privptr); } } /* probe_error */ /*-------------------------------------------------------------------* * claw_process_control * * * * * *--------------------------------------------------------------------*/ static int claw_process_control( struct net_device *dev, struct ccwbk * p_ccw) { struct clawbuf *p_buf; struct clawctl ctlbk; struct clawctl *p_ctlbk; char temp_host_name[8]; char temp_ws_name[8]; struct claw_privbk *privptr; struct claw_env *p_env; struct sysval *p_sysval; struct conncmd *p_connect=NULL; int rc; struct chbk *p_ch = NULL; struct device *tdev; CLAW_DBF_TEXT(2, setup, "clw_cntl"); udelay(1000); /* Wait a ms for the control packets to *catch up to each other */ privptr = dev->ml_priv; p_env=privptr->p_env; tdev = &privptr->channel[READ_CHANNEL].cdev->dev; memcpy( &temp_host_name, p_env->host_name, 8); memcpy( &temp_ws_name, p_env->adapter_name , 8); dev_info(tdev, "%s: CLAW device %.8s: " "Received Control Packet\n", dev->name, temp_ws_name); if (privptr->release_pend==1) { return 0; } p_buf=p_ccw->p_buffer; p_ctlbk=&ctlbk; if (p_env->packing == DO_PACKED) { /* packing in progress?*/ memcpy(p_ctlbk, &p_buf->buffer[4], sizeof(struct clawctl)); } else { memcpy(p_ctlbk, p_buf, sizeof(struct clawctl)); } switch (p_ctlbk->command) { case SYSTEM_VALIDATE_REQUEST: if (p_ctlbk->version != CLAW_VERSION_ID) { claw_snd_sys_validate_rsp(dev, p_ctlbk, CLAW_RC_WRONG_VERSION); dev_warn(tdev, "The communication peer of %s" " uses an incorrect API version %d\n", dev->name, p_ctlbk->version); } p_sysval = (struct sysval *)&(p_ctlbk->data); dev_info(tdev, "%s: Recv Sys Validate Request: " "Vers=%d,link_id=%d,Corr=%d,WS name=%.8s," "Host name=%.8s\n", dev->name, p_ctlbk->version, p_ctlbk->linkid, p_ctlbk->correlator, p_sysval->WS_name, p_sysval->host_name); if (memcmp(temp_host_name, p_sysval->host_name, 8)) { claw_snd_sys_validate_rsp(dev, p_ctlbk, CLAW_RC_NAME_MISMATCH); CLAW_DBF_TEXT(2, setup, "HSTBAD"); CLAW_DBF_TEXT_(2, setup, "%s", p_sysval->host_name); CLAW_DBF_TEXT_(2, setup, "%s", temp_host_name); dev_warn(tdev, "Host name %s for %s does not match the" " remote adapter name %s\n", p_sysval->host_name, dev->name, temp_host_name); } if (memcmp(temp_ws_name, p_sysval->WS_name, 8)) { claw_snd_sys_validate_rsp(dev, p_ctlbk, CLAW_RC_NAME_MISMATCH); CLAW_DBF_TEXT(2, setup, "WSNBAD"); CLAW_DBF_TEXT_(2, setup, "%s", p_sysval->WS_name); CLAW_DBF_TEXT_(2, setup, "%s", temp_ws_name); dev_warn(tdev, "Adapter name %s for %s does not match" " the remote host name %s\n", p_sysval->WS_name, dev->name, temp_ws_name); } if ((p_sysval->write_frame_size < p_env->write_size) && (p_env->packing == 0)) { claw_snd_sys_validate_rsp(dev, p_ctlbk, CLAW_RC_HOST_RCV_TOO_SMALL); dev_warn(tdev, "The local write buffer is smaller than the" " remote read buffer\n"); CLAW_DBF_TEXT(2, setup, "wrtszbad"); } if ((p_sysval->read_frame_size < p_env->read_size) && (p_env->packing == 0)) { claw_snd_sys_validate_rsp(dev, p_ctlbk, CLAW_RC_HOST_RCV_TOO_SMALL); dev_warn(tdev, "The local read buffer is smaller than the" " remote write buffer\n"); CLAW_DBF_TEXT(2, setup, "rdsizbad"); } claw_snd_sys_validate_rsp(dev, p_ctlbk, 0); dev_info(tdev, "CLAW device %.8s: System validate" " completed.\n", temp_ws_name); dev_info(tdev, "%s: sys Validate Rsize:%d Wsize:%d\n", dev->name, p_sysval->read_frame_size, p_sysval->write_frame_size); privptr->system_validate_comp = 1; if (strncmp(p_env->api_type, WS_APPL_NAME_PACKED, 6) == 0) p_env->packing = PACKING_ASK; claw_strt_conn_req(dev); break; case SYSTEM_VALIDATE_RESPONSE: p_sysval = (struct sysval *)&(p_ctlbk->data); dev_info(tdev, "Settings for %s validated (version=%d, " "remote device=%d, rc=%d, adapter name=%.8s, " "host name=%.8s)\n", dev->name, p_ctlbk->version, p_ctlbk->correlator, p_ctlbk->rc, p_sysval->WS_name, p_sysval->host_name); switch (p_ctlbk->rc) { case 0: dev_info(tdev, "%s: CLAW device " "%.8s: System validate completed.\n", dev->name, temp_ws_name); if (privptr->system_validate_comp == 0) claw_strt_conn_req(dev); privptr->system_validate_comp = 1; break; case CLAW_RC_NAME_MISMATCH: dev_warn(tdev, "Validating %s failed because of" " a host or adapter name mismatch\n", dev->name); break; case CLAW_RC_WRONG_VERSION: dev_warn(tdev, "Validating %s failed because of a" " version conflict\n", dev->name); break; case CLAW_RC_HOST_RCV_TOO_SMALL: dev_warn(tdev, "Validating %s failed because of a" " frame size conflict\n", dev->name); break; default: dev_warn(tdev, "The communication peer of %s rejected" " the connection\n", dev->name); break; } break; case CONNECTION_REQUEST: p_connect = (struct conncmd *)&(p_ctlbk->data); dev_info(tdev, "%s: Recv Conn Req: Vers=%d,link_id=%d," "Corr=%d,HOST appl=%.8s,WS appl=%.8s\n", dev->name, p_ctlbk->version, p_ctlbk->linkid, p_ctlbk->correlator, p_connect->host_name, p_connect->WS_name); if (privptr->active_link_ID != 0) { claw_snd_disc(dev, p_ctlbk); dev_info(tdev, "%s rejected a connection request" " because it is already active\n", dev->name); } if (p_ctlbk->linkid != 1) { claw_snd_disc(dev, p_ctlbk); dev_info(tdev, "%s rejected a request to open multiple" " connections\n", dev->name); } rc = find_link(dev, p_connect->host_name, p_connect->WS_name); if (rc != 0) { claw_snd_disc(dev, p_ctlbk); dev_info(tdev, "%s rejected a connection request" " because of a type mismatch\n", dev->name); } claw_send_control(dev, CONNECTION_CONFIRM, p_ctlbk->linkid, p_ctlbk->correlator, 0, p_connect->host_name, p_connect->WS_name); if (p_env->packing == PACKING_ASK) { p_env->packing = PACK_SEND; claw_snd_conn_req(dev, 0); } dev_info(tdev, "%s: CLAW device %.8s: Connection " "completed link_id=%d.\n", dev->name, temp_ws_name, p_ctlbk->linkid); privptr->active_link_ID = p_ctlbk->linkid; p_ch = &privptr->channel[WRITE_CHANNEL]; wake_up(&p_ch->wait); /* wake up claw_open ( WRITE) */ break; case CONNECTION_RESPONSE: p_connect = (struct conncmd *)&(p_ctlbk->data); dev_info(tdev, "%s: Recv Conn Resp: Vers=%d,link_id=%d," "Corr=%d,RC=%d,Host appl=%.8s, WS appl=%.8s\n", dev->name, p_ctlbk->version, p_ctlbk->linkid, p_ctlbk->correlator, p_ctlbk->rc, p_connect->host_name, p_connect->WS_name); if (p_ctlbk->rc != 0) { dev_warn(tdev, "The communication peer of %s rejected" " a connection request\n", dev->name); return 1; } rc = find_link(dev, p_connect->host_name, p_connect->WS_name); if (rc != 0) { claw_snd_disc(dev, p_ctlbk); dev_warn(tdev, "The communication peer of %s" " rejected a connection " "request because of a type mismatch\n", dev->name); } /* should be until CONNECTION_CONFIRM */ privptr->active_link_ID = -(p_ctlbk->linkid); break; case CONNECTION_CONFIRM: p_connect = (struct conncmd *)&(p_ctlbk->data); dev_info(tdev, "%s: Recv Conn Confirm:Vers=%d,link_id=%d," "Corr=%d,Host appl=%.8s,WS appl=%.8s\n", dev->name, p_ctlbk->version, p_ctlbk->linkid, p_ctlbk->correlator, p_connect->host_name, p_connect->WS_name); if (p_ctlbk->linkid == -(privptr->active_link_ID)) { privptr->active_link_ID = p_ctlbk->linkid; if (p_env->packing > PACKING_ASK) { dev_info(tdev, "%s: Confirmed Now packing\n", dev->name); p_env->packing = DO_PACKED; } p_ch = &privptr->channel[WRITE_CHANNEL]; wake_up(&p_ch->wait); } else { dev_warn(tdev, "Activating %s failed because of" " an incorrect link ID=%d\n", dev->name, p_ctlbk->linkid); claw_snd_disc(dev, p_ctlbk); } break; case DISCONNECT: dev_info(tdev, "%s: Disconnect: " "Vers=%d,link_id=%d,Corr=%d\n", dev->name, p_ctlbk->version, p_ctlbk->linkid, p_ctlbk->correlator); if ((p_ctlbk->linkid == 2) && (p_env->packing == PACK_SEND)) { privptr->active_link_ID = 1; p_env->packing = DO_PACKED; } else privptr->active_link_ID = 0; break; case CLAW_ERROR: dev_warn(tdev, "The communication peer of %s failed\n", dev->name); break; default: dev_warn(tdev, "The communication peer of %s sent" " an unknown command code\n", dev->name); break; } return 0; } /* end of claw_process_control */ /*-------------------------------------------------------------------* * claw_send_control * * * *--------------------------------------------------------------------*/ static int claw_send_control(struct net_device *dev, __u8 type, __u8 link, __u8 correlator, __u8 rc, char *local_name, char *remote_name) { struct claw_privbk *privptr; struct clawctl *p_ctl; struct sysval *p_sysval; struct conncmd *p_connect; struct sk_buff *skb; CLAW_DBF_TEXT(2, setup, "sndcntl"); privptr = dev->ml_priv; p_ctl=(struct clawctl *)&privptr->ctl_bk; p_ctl->command=type; p_ctl->version=CLAW_VERSION_ID; p_ctl->linkid=link; p_ctl->correlator=correlator; p_ctl->rc=rc; p_sysval=(struct sysval *)&p_ctl->data; p_connect=(struct conncmd *)&p_ctl->data; switch (p_ctl->command) { case SYSTEM_VALIDATE_REQUEST: case SYSTEM_VALIDATE_RESPONSE: memcpy(&p_sysval->host_name, local_name, 8); memcpy(&p_sysval->WS_name, remote_name, 8); if (privptr->p_env->packing > 0) { p_sysval->read_frame_size = DEF_PACK_BUFSIZE; p_sysval->write_frame_size = DEF_PACK_BUFSIZE; } else { /* how big is the biggest group of packets */ p_sysval->read_frame_size = privptr->p_env->read_size; p_sysval->write_frame_size = privptr->p_env->write_size; } memset(&p_sysval->reserved, 0x00, 4); break; case CONNECTION_REQUEST: case CONNECTION_RESPONSE: case CONNECTION_CONFIRM: case DISCONNECT: memcpy(&p_sysval->host_name, local_name, 8); memcpy(&p_sysval->WS_name, remote_name, 8); if (privptr->p_env->packing > 0) { /* How big is the biggest packet */ p_connect->reserved1[0]=CLAW_FRAME_SIZE; p_connect->reserved1[1]=CLAW_FRAME_SIZE; } else { memset(&p_connect->reserved1, 0x00, 4); memset(&p_connect->reserved2, 0x00, 4); } break; default: break; } /* write Control Record to the device */ skb = dev_alloc_skb(sizeof(struct clawctl)); if (!skb) { return -ENOMEM; } memcpy(skb_put(skb, sizeof(struct clawctl)), p_ctl, sizeof(struct clawctl)); if (privptr->p_env->packing >= PACK_SEND) claw_hw_tx(skb, dev, 1); else claw_hw_tx(skb, dev, 0); return 0; } /* end of claw_send_control */ /*-------------------------------------------------------------------* * claw_snd_conn_req * * * *--------------------------------------------------------------------*/ static int claw_snd_conn_req(struct net_device *dev, __u8 link) { int rc; struct claw_privbk *privptr = dev->ml_priv; struct clawctl *p_ctl; CLAW_DBF_TEXT(2, setup, "snd_conn"); rc = 1; p_ctl=(struct clawctl *)&privptr->ctl_bk; p_ctl->linkid = link; if ( privptr->system_validate_comp==0x00 ) { return rc; } if (privptr->p_env->packing == PACKING_ASK ) rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0, WS_APPL_NAME_PACKED, WS_APPL_NAME_PACKED); if (privptr->p_env->packing == PACK_SEND) { rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0, WS_APPL_NAME_IP_NAME, WS_APPL_NAME_IP_NAME); } if (privptr->p_env->packing == 0) rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0, HOST_APPL_NAME, privptr->p_env->api_type); return rc; } /* end of claw_snd_conn_req */ /*-------------------------------------------------------------------* * claw_snd_disc * * * *--------------------------------------------------------------------*/ static int claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl) { int rc; struct conncmd * p_connect; CLAW_DBF_TEXT(2, setup, "snd_dsc"); p_connect=(struct conncmd *)&p_ctl->data; rc=claw_send_control(dev, DISCONNECT, p_ctl->linkid, p_ctl->correlator, 0, p_connect->host_name, p_connect->WS_name); return rc; } /* end of claw_snd_disc */ /*-------------------------------------------------------------------* * claw_snd_sys_validate_rsp * * * *--------------------------------------------------------------------*/ static int claw_snd_sys_validate_rsp(struct net_device *dev, struct clawctl *p_ctl, __u32 return_code) { struct claw_env * p_env; struct claw_privbk *privptr; int rc; CLAW_DBF_TEXT(2, setup, "chkresp"); privptr = dev->ml_priv; p_env=privptr->p_env; rc=claw_send_control(dev, SYSTEM_VALIDATE_RESPONSE, p_ctl->linkid, p_ctl->correlator, return_code, p_env->host_name, p_env->adapter_name ); return rc; } /* end of claw_snd_sys_validate_rsp */ /*-------------------------------------------------------------------* * claw_strt_conn_req * * * *--------------------------------------------------------------------*/ static int claw_strt_conn_req(struct net_device *dev ) { int rc; CLAW_DBF_TEXT(2, setup, "conn_req"); rc=claw_snd_conn_req(dev, 1); return rc; } /* end of claw_strt_conn_req */ /*-------------------------------------------------------------------* * claw_stats * *-------------------------------------------------------------------*/ static struct net_device_stats *claw_stats(struct net_device *dev) { struct claw_privbk *privptr; CLAW_DBF_TEXT(4, trace, "stats"); privptr = dev->ml_priv; return &privptr->stats; } /* end of claw_stats */ /*-------------------------------------------------------------------* * unpack_read * * * *--------------------------------------------------------------------*/ static void unpack_read(struct net_device *dev ) { struct sk_buff *skb; struct claw_privbk *privptr; struct claw_env *p_env; struct ccwbk *p_this_ccw; struct ccwbk *p_first_ccw; struct ccwbk *p_last_ccw; struct clawph *p_packh; void *p_packd; struct clawctl *p_ctlrec=NULL; struct device *p_dev; __u32 len_of_data; __u32 pack_off; __u8 link_num; __u8 mtc_this_frm=0; __u32 bytes_to_mov; int i=0; int p=0; CLAW_DBF_TEXT(4, trace, "unpkread"); p_first_ccw=NULL; p_last_ccw=NULL; p_packh=NULL; p_packd=NULL; privptr = dev->ml_priv; p_dev = &privptr->channel[READ_CHANNEL].cdev->dev; p_env = privptr->p_env; p_this_ccw=privptr->p_read_active_first; while (p_this_ccw!=NULL && p_this_ccw->header.flag!=CLAW_PENDING) { pack_off = 0; p = 0; p_this_ccw->header.flag=CLAW_PENDING; privptr->p_read_active_first=p_this_ccw->next; p_this_ccw->next=NULL; p_packh = (struct clawph *)p_this_ccw->p_buffer; if ((p_env->packing == PACK_SEND) && (p_packh->len == 32) && (p_packh->link_num == 0)) { /* is it a packed ctl rec? */ p_packh++; /* peek past pack header */ p_ctlrec = (struct clawctl *)p_packh; p_packh--; /* un peek */ if ((p_ctlrec->command == CONNECTION_RESPONSE) || (p_ctlrec->command == CONNECTION_CONFIRM)) p_env->packing = DO_PACKED; } if (p_env->packing == DO_PACKED) link_num=p_packh->link_num; else link_num=p_this_ccw->header.opcode / 8; if ((p_this_ccw->header.opcode & MORE_to_COME_FLAG)!=0) { mtc_this_frm=1; if (p_this_ccw->header.length!= privptr->p_env->read_size ) { dev_warn(p_dev, "The communication peer of %s" " sent a faulty" " frame of length %02x\n", dev->name, p_this_ccw->header.length); } } if (privptr->mtc_skipping) { /* * We're in the mode of skipping past a * multi-frame message * that we can't process for some reason or other. * The first frame without the More-To-Come flag is * the last frame of the skipped message. */ /* in case of More-To-Come not set in this frame */ if (mtc_this_frm==0) { privptr->mtc_skipping=0; /* Ok, the end */ privptr->mtc_logical_link=-1; } goto NextFrame; } if (link_num==0) { claw_process_control(dev, p_this_ccw); CLAW_DBF_TEXT(4, trace, "UnpkCntl"); goto NextFrame; } unpack_next: if (p_env->packing == DO_PACKED) { if (pack_off > p_env->read_size) goto NextFrame; p_packd = p_this_ccw->p_buffer+pack_off; p_packh = (struct clawph *) p_packd; if ((p_packh->len == 0) || /* done with this frame? */ (p_packh->flag != 0)) goto NextFrame; bytes_to_mov = p_packh->len; pack_off += bytes_to_mov+sizeof(struct clawph); p++; } else { bytes_to_mov=p_this_ccw->header.length; } if (privptr->mtc_logical_link<0) { /* * if More-To-Come is set in this frame then we don't know * length of entire message, and hence have to allocate * large buffer */ /* We are starting a new envelope */ privptr->mtc_offset=0; privptr->mtc_logical_link=link_num; } if (bytes_to_mov > (MAX_ENVELOPE_SIZE- privptr->mtc_offset) ) { /* error */ privptr->stats.rx_frame_errors++; goto NextFrame; } if (p_env->packing == DO_PACKED) { memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset, p_packd+sizeof(struct clawph), bytes_to_mov); } else { memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset, p_this_ccw->p_buffer, bytes_to_mov); } if (mtc_this_frm==0) { len_of_data=privptr->mtc_offset+bytes_to_mov; skb=dev_alloc_skb(len_of_data); if (skb) { memcpy(skb_put(skb,len_of_data), privptr->p_mtc_envelope, len_of_data); skb->dev=dev; skb_reset_mac_header(skb); skb->protocol=htons(ETH_P_IP); skb->ip_summed=CHECKSUM_UNNECESSARY; privptr->stats.rx_packets++; privptr->stats.rx_bytes+=len_of_data; netif_rx(skb); } else { dev_info(p_dev, "Allocating a buffer for" " incoming data failed\n"); privptr->stats.rx_dropped++; } privptr->mtc_offset=0; privptr->mtc_logical_link=-1; } else { privptr->mtc_offset+=bytes_to_mov; } if (p_env->packing == DO_PACKED) goto unpack_next; NextFrame: /* * Remove ThisCCWblock from active read queue, and add it * to queue of free blocks to be reused. */ i++; p_this_ccw->header.length=0xffff; p_this_ccw->header.opcode=0xff; /* * add this one to the free queue for later reuse */ if (p_first_ccw==NULL) { p_first_ccw = p_this_ccw; } else { p_last_ccw->next = p_this_ccw; } p_last_ccw = p_this_ccw; /* * chain to next block on active read queue */ p_this_ccw = privptr->p_read_active_first; CLAW_DBF_TEXT_(4, trace, "rxpkt %d", p); } /* end of while */ /* check validity */ CLAW_DBF_TEXT_(4, trace, "rxfrm %d", i); add_claw_reads(dev, p_first_ccw, p_last_ccw); claw_strt_read(dev, LOCK_YES); return; } /* end of unpack_read */ /*-------------------------------------------------------------------* * claw_strt_read * * * *--------------------------------------------------------------------*/ static void claw_strt_read (struct net_device *dev, int lock ) { int rc = 0; __u32 parm; unsigned long saveflags = 0; struct claw_privbk *privptr = dev->ml_priv; struct ccwbk*p_ccwbk; struct chbk *p_ch; struct clawh *p_clawh; p_ch = &privptr->channel[READ_CHANNEL]; CLAW_DBF_TEXT(4, trace, "StRdNter"); p_clawh=(struct clawh *)privptr->p_claw_signal_blk; p_clawh->flag=CLAW_IDLE; /* 0x00 */ if ((privptr->p_write_active_first!=NULL && privptr->p_write_active_first->header.flag!=CLAW_PENDING) || (privptr->p_read_active_first!=NULL && privptr->p_read_active_first->header.flag!=CLAW_PENDING )) { p_clawh->flag=CLAW_BUSY; /* 0xff */ } if (lock==LOCK_YES) { spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags); } if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) { CLAW_DBF_TEXT(4, trace, "HotRead"); p_ccwbk=privptr->p_read_active_first; parm = (unsigned long) p_ch; rc = ccw_device_start (p_ch->cdev, &p_ccwbk->read, parm, 0xff, 0); if (rc != 0) { ccw_check_return_code(p_ch->cdev, rc); } } else { CLAW_DBF_TEXT(2, trace, "ReadAct"); } if (lock==LOCK_YES) { spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags); } CLAW_DBF_TEXT(4, trace, "StRdExit"); return; } /* end of claw_strt_read */ /*-------------------------------------------------------------------* * claw_strt_out_IO * * * *--------------------------------------------------------------------*/ static void claw_strt_out_IO( struct net_device *dev ) { int rc = 0; unsigned long parm; struct claw_privbk *privptr; struct chbk *p_ch; struct ccwbk *p_first_ccw; if (!dev) { return; } privptr = (struct claw_privbk *)dev->ml_priv; p_ch = &privptr->channel[WRITE_CHANNEL]; CLAW_DBF_TEXT(4, trace, "strt_io"); p_first_ccw=privptr->p_write_active_first; if (p_ch->claw_state == CLAW_STOP) return; if (p_first_ccw == NULL) { return; } if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) { parm = (unsigned long) p_ch; CLAW_DBF_TEXT(2, trace, "StWrtIO"); rc = ccw_device_start(p_ch->cdev, &p_first_ccw->write, parm, 0xff, 0); if (rc != 0) { ccw_check_return_code(p_ch->cdev, rc); } } dev->trans_start = jiffies; return; } /* end of claw_strt_out_IO */ /*-------------------------------------------------------------------* * Free write buffers * * * *--------------------------------------------------------------------*/ static void claw_free_wrt_buf( struct net_device *dev ) { struct claw_privbk *privptr = (struct claw_privbk *)dev->ml_priv; struct ccwbk*p_this_ccw; struct ccwbk*p_next_ccw; CLAW_DBF_TEXT(4, trace, "freewrtb"); /* scan the write queue to free any completed write packets */ p_this_ccw=privptr->p_write_active_first; while ( (p_this_ccw!=NULL) && (p_this_ccw->header.flag!=CLAW_PENDING)) { p_next_ccw = p_this_ccw->next; if (((p_next_ccw!=NULL) && (p_next_ccw->header.flag!=CLAW_PENDING)) || ((p_this_ccw == privptr->p_write_active_last) && (p_this_ccw->header.flag!=CLAW_PENDING))) { /* The next CCW is OK or this is */ /* the last CCW...free it @A1A */ privptr->p_write_active_first=p_this_ccw->next; p_this_ccw->header.flag=CLAW_PENDING; p_this_ccw->next=privptr->p_write_free_chain; privptr->p_write_free_chain=p_this_ccw; ++privptr->write_free_count; privptr->stats.tx_bytes+= p_this_ccw->write.count; p_this_ccw=privptr->p_write_active_first; privptr->stats.tx_packets++; } else { break; } } if (privptr->write_free_count!=0) { claw_clearbit_busy(TB_NOBUFFER,dev); } /* whole chain removed? */ if (privptr->p_write_active_first==NULL) { privptr->p_write_active_last=NULL; } CLAW_DBF_TEXT_(4, trace, "FWC=%d", privptr->write_free_count); return; } /*-------------------------------------------------------------------* * claw free netdevice * * * *--------------------------------------------------------------------*/ static void claw_free_netdevice(struct net_device * dev, int free_dev) { struct claw_privbk *privptr; CLAW_DBF_TEXT(2, setup, "free_dev"); if (!dev) return; CLAW_DBF_TEXT_(2, setup, "%s", dev->name); privptr = dev->ml_priv; if (dev->flags & IFF_RUNNING) claw_release(dev); if (privptr) { privptr->channel[READ_CHANNEL].ndev = NULL; /* say it's free */ } dev->ml_priv = NULL; #ifdef MODULE if (free_dev) { free_netdev(dev); } #endif CLAW_DBF_TEXT(2, setup, "free_ok"); } /** * Claw init netdevice * Initialize everything of the net device except the name and the * channel structs. */ static const struct net_device_ops claw_netdev_ops = { .ndo_open = claw_open, .ndo_stop = claw_release, .ndo_get_stats = claw_stats, .ndo_start_xmit = claw_tx, .ndo_change_mtu = claw_change_mtu, }; static void claw_init_netdevice(struct net_device * dev) { CLAW_DBF_TEXT(2, setup, "init_dev"); CLAW_DBF_TEXT_(2, setup, "%s", dev->name); dev->mtu = CLAW_DEFAULT_MTU_SIZE; dev->hard_header_len = 0; dev->addr_len = 0; dev->type = ARPHRD_SLIP; dev->tx_queue_len = 1300; dev->flags = IFF_POINTOPOINT | IFF_NOARP; dev->netdev_ops = &claw_netdev_ops; CLAW_DBF_TEXT(2, setup, "initok"); return; } /** * Init a new channel in the privptr->channel[i]. * * @param cdev The ccw_device to be added. * * @return 0 on success, !0 on error. */ static int add_channel(struct ccw_device *cdev,int i,struct claw_privbk *privptr) { struct chbk *p_ch; struct ccw_dev_id dev_id; CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cdev->dev)); privptr->channel[i].flag = i+1; /* Read is 1 Write is 2 */ p_ch = &privptr->channel[i]; p_ch->cdev = cdev; snprintf(p_ch->id, CLAW_ID_SIZE, "cl-%s", dev_name(&cdev->dev)); ccw_device_get_id(cdev, &dev_id); p_ch->devno = dev_id.devno; if ((p_ch->irb = kzalloc(sizeof (struct irb),GFP_KERNEL)) == NULL) { return -ENOMEM; } return 0; } /** * * Setup an interface. * * @param cgdev Device to be setup. * * @returns 0 on success, !0 on failure. */ static int claw_new_device(struct ccwgroup_device *cgdev) { struct claw_privbk *privptr; struct claw_env *p_env; struct net_device *dev; int ret; struct ccw_dev_id dev_id; dev_info(&cgdev->dev, "add for %s\n", dev_name(&cgdev->cdev[READ_CHANNEL]->dev)); CLAW_DBF_TEXT(2, setup, "new_dev"); privptr = dev_get_drvdata(&cgdev->dev); dev_set_drvdata(&cgdev->cdev[READ_CHANNEL]->dev, privptr); dev_set_drvdata(&cgdev->cdev[WRITE_CHANNEL]->dev, privptr); if (!privptr) return -ENODEV; p_env = privptr->p_env; ccw_device_get_id(cgdev->cdev[READ_CHANNEL], &dev_id); p_env->devno[READ_CHANNEL] = dev_id.devno; ccw_device_get_id(cgdev->cdev[WRITE_CHANNEL], &dev_id); p_env->devno[WRITE_CHANNEL] = dev_id.devno; ret = add_channel(cgdev->cdev[0],0,privptr); if (ret == 0) ret = add_channel(cgdev->cdev[1],1,privptr); if (ret != 0) { dev_warn(&cgdev->dev, "Creating a CLAW group device" " failed with error code %d\n", ret); goto out; } ret = ccw_device_set_online(cgdev->cdev[READ_CHANNEL]); if (ret != 0) { dev_warn(&cgdev->dev, "Setting the read subchannel online" " failed with error code %d\n", ret); goto out; } ret = ccw_device_set_online(cgdev->cdev[WRITE_CHANNEL]); if (ret != 0) { dev_warn(&cgdev->dev, "Setting the write subchannel online " "failed with error code %d\n", ret); goto out; } dev = alloc_netdev(0,"claw%d",claw_init_netdevice); if (!dev) { dev_warn(&cgdev->dev, "Activating the CLAW device failed\n"); goto out; } dev->ml_priv = privptr; dev_set_drvdata(&cgdev->dev, privptr); dev_set_drvdata(&cgdev->cdev[READ_CHANNEL]->dev, privptr); dev_set_drvdata(&cgdev->cdev[WRITE_CHANNEL]->dev, privptr); /* sysfs magic */ SET_NETDEV_DEV(dev, &cgdev->dev); if (register_netdev(dev) != 0) { claw_free_netdevice(dev, 1); CLAW_DBF_TEXT(2, trace, "regfail"); goto out; } dev->flags &=~IFF_RUNNING; if (privptr->buffs_alloc == 0) { ret=init_ccw_bk(dev); if (ret !=0) { unregister_netdev(dev); claw_free_netdevice(dev,1); CLAW_DBF_TEXT(2, trace, "ccwmem"); goto out; } } privptr->channel[READ_CHANNEL].ndev = dev; privptr->channel[WRITE_CHANNEL].ndev = dev; privptr->p_env->ndev = dev; dev_info(&cgdev->dev, "%s:readsize=%d writesize=%d " "readbuffer=%d writebuffer=%d read=0x%04x write=0x%04x\n", dev->name, p_env->read_size, p_env->write_size, p_env->read_buffers, p_env->write_buffers, p_env->devno[READ_CHANNEL], p_env->devno[WRITE_CHANNEL]); dev_info(&cgdev->dev, "%s:host_name:%.8s, adapter_name " ":%.8s api_type: %.8s\n", dev->name, p_env->host_name, p_env->adapter_name , p_env->api_type); return 0; out: ccw_device_set_offline(cgdev->cdev[1]); ccw_device_set_offline(cgdev->cdev[0]); return -ENODEV; } static void claw_purge_skb_queue(struct sk_buff_head *q) { struct sk_buff *skb; CLAW_DBF_TEXT(4, trace, "purgque"); while ((skb = skb_dequeue(q))) { atomic_dec(&skb->users); dev_kfree_skb_any(skb); } } /** * Shutdown an interface. * * @param cgdev Device to be shut down. * * @returns 0 on success, !0 on failure. */ static int claw_shutdown_device(struct ccwgroup_device *cgdev) { struct claw_privbk *priv; struct net_device *ndev; int ret = 0; CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cgdev->dev)); priv = dev_get_drvdata(&cgdev->dev); if (!priv) return -ENODEV; ndev = priv->channel[READ_CHANNEL].ndev; if (ndev) { /* Close the device */ dev_info(&cgdev->dev, "%s: shutting down\n", ndev->name); if (ndev->flags & IFF_RUNNING) ret = claw_release(ndev); ndev->flags &=~IFF_RUNNING; unregister_netdev(ndev); ndev->ml_priv = NULL; /* cgdev data, not ndev's to free */ claw_free_netdevice(ndev, 1); priv->channel[READ_CHANNEL].ndev = NULL; priv->channel[WRITE_CHANNEL].ndev = NULL; priv->p_env->ndev = NULL; } ccw_device_set_offline(cgdev->cdev[1]); ccw_device_set_offline(cgdev->cdev[0]); return ret; } static void claw_remove_device(struct ccwgroup_device *cgdev) { struct claw_privbk *priv; BUG_ON(!cgdev); CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cgdev->dev)); priv = dev_get_drvdata(&cgdev->dev); BUG_ON(!priv); dev_info(&cgdev->dev, " will be removed.\n"); if (cgdev->state == CCWGROUP_ONLINE) claw_shutdown_device(cgdev); claw_remove_files(&cgdev->dev); kfree(priv->p_mtc_envelope); priv->p_mtc_envelope=NULL; kfree(priv->p_env); priv->p_env=NULL; kfree(priv->channel[0].irb); priv->channel[0].irb=NULL; kfree(priv->channel[1].irb); priv->channel[1].irb=NULL; kfree(priv); dev_set_drvdata(&cgdev->dev, NULL); dev_set_drvdata(&cgdev->cdev[READ_CHANNEL]->dev, NULL); dev_set_drvdata(&cgdev->cdev[WRITE_CHANNEL]->dev, NULL); put_device(&cgdev->dev); return; } /* * sysfs attributes */ static ssize_t claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf) { struct claw_privbk *priv; struct claw_env * p_env; priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; p_env = priv->p_env; return sprintf(buf, "%s\n",p_env->host_name); } static ssize_t claw_hname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct claw_privbk *priv; struct claw_env * p_env; priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; p_env = priv->p_env; if (count > MAX_NAME_LEN+1) return -EINVAL; memset(p_env->host_name, 0x20, MAX_NAME_LEN); strncpy(p_env->host_name,buf, count); p_env->host_name[count-1] = 0x20; /* clear extra 0x0a */ p_env->host_name[MAX_NAME_LEN] = 0x00; CLAW_DBF_TEXT(2, setup, "HstnSet"); CLAW_DBF_TEXT_(2, setup, "%s", p_env->host_name); return count; } static DEVICE_ATTR(host_name, 0644, claw_hname_show, claw_hname_write); static ssize_t claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf) { struct claw_privbk *priv; struct claw_env * p_env; priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; p_env = priv->p_env; return sprintf(buf, "%s\n", p_env->adapter_name); } static ssize_t claw_adname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct claw_privbk *priv; struct claw_env * p_env; priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; p_env = priv->p_env; if (count > MAX_NAME_LEN+1) return -EINVAL; memset(p_env->adapter_name, 0x20, MAX_NAME_LEN); strncpy(p_env->adapter_name,buf, count); p_env->adapter_name[count-1] = 0x20; /* clear extra 0x0a */ p_env->adapter_name[MAX_NAME_LEN] = 0x00; CLAW_DBF_TEXT(2, setup, "AdnSet"); CLAW_DBF_TEXT_(2, setup, "%s", p_env->adapter_name); return count; } static DEVICE_ATTR(adapter_name, 0644, claw_adname_show, claw_adname_write); static ssize_t claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf) { struct claw_privbk *priv; struct claw_env * p_env; priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; p_env = priv->p_env; return sprintf(buf, "%s\n", p_env->api_type); } static ssize_t claw_apname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct claw_privbk *priv; struct claw_env * p_env; priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; p_env = priv->p_env; if (count > MAX_NAME_LEN+1) return -EINVAL; memset(p_env->api_type, 0x20, MAX_NAME_LEN); strncpy(p_env->api_type,buf, count); p_env->api_type[count-1] = 0x20; /* we get a loose 0x0a */ p_env->api_type[MAX_NAME_LEN] = 0x00; if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) { p_env->read_size=DEF_PACK_BUFSIZE; p_env->write_size=DEF_PACK_BUFSIZE; p_env->packing=PACKING_ASK; CLAW_DBF_TEXT(2, setup, "PACKING"); } else { p_env->packing=0; p_env->read_size=CLAW_FRAME_SIZE; p_env->write_size=CLAW_FRAME_SIZE; CLAW_DBF_TEXT(2, setup, "ApiSet"); } CLAW_DBF_TEXT_(2, setup, "%s", p_env->api_type); return count; } static DEVICE_ATTR(api_type, 0644, claw_apname_show, claw_apname_write); static ssize_t claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf) { struct claw_privbk *priv; struct claw_env * p_env; priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; p_env = priv->p_env; return sprintf(buf, "%d\n", p_env->write_buffers); } static ssize_t claw_wbuff_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct claw_privbk *priv; struct claw_env * p_env; int nnn,max; priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; p_env = priv->p_env; sscanf(buf, "%i", &nnn); if (p_env->packing) { max = 64; } else { max = 512; } if ((nnn > max ) || (nnn < 2)) return -EINVAL; p_env->write_buffers = nnn; CLAW_DBF_TEXT(2, setup, "Wbufset"); CLAW_DBF_TEXT_(2, setup, "WB=%d", p_env->write_buffers); return count; } static DEVICE_ATTR(write_buffer, 0644, claw_wbuff_show, claw_wbuff_write); static ssize_t claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf) { struct claw_privbk *priv; struct claw_env * p_env; priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; p_env = priv->p_env; return sprintf(buf, "%d\n", p_env->read_buffers); } static ssize_t claw_rbuff_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct claw_privbk *priv; struct claw_env *p_env; int nnn,max; priv = dev_get_drvdata(dev); if (!priv) return -ENODEV; p_env = priv->p_env; sscanf(buf, "%i", &nnn); if (p_env->packing) { max = 64; } else { max = 512; } if ((nnn > max ) || (nnn < 2)) return -EINVAL; p_env->read_buffers = nnn; CLAW_DBF_TEXT(2, setup, "Rbufset"); CLAW_DBF_TEXT_(2, setup, "RB=%d", p_env->read_buffers); return count; } static DEVICE_ATTR(read_buffer, 0644, claw_rbuff_show, claw_rbuff_write); static struct attribute *claw_attr[] = { &dev_attr_read_buffer.attr, &dev_attr_write_buffer.attr, &dev_attr_adapter_name.attr, &dev_attr_api_type.attr, &dev_attr_host_name.attr, NULL, }; static struct attribute_group claw_attr_group = { .attrs = claw_attr, }; static int claw_add_files(struct device *dev) { CLAW_DBF_TEXT(2, setup, "add_file"); return sysfs_create_group(&dev->kobj, &claw_attr_group); } static void claw_remove_files(struct device *dev) { CLAW_DBF_TEXT(2, setup, "rem_file"); sysfs_remove_group(&dev->kobj, &claw_attr_group); } /*--------------------------------------------------------------------* * claw_init and cleanup * *---------------------------------------------------------------------*/ static void __exit claw_cleanup(void) { driver_remove_file(&claw_group_driver.driver, &driver_attr_group); ccwgroup_driver_unregister(&claw_group_driver); ccw_driver_unregister(&claw_ccw_driver); root_device_unregister(claw_root_dev); claw_unregister_debug_facility(); pr_info("Driver unloaded\n"); } /** * Initialize module. * This is called just after the module is loaded. * * @return 0 on success, !0 on error. */ static int __init claw_init(void) { int ret = 0; pr_info("Loading %s\n", version); ret = claw_register_debug_facility(); if (ret) { pr_err("Registering with the S/390 debug feature" " failed with error code %d\n", ret); goto out_err; } CLAW_DBF_TEXT(2, setup, "init_mod"); claw_root_dev = root_device_register("claw"); ret = IS_ERR(claw_root_dev) ? PTR_ERR(claw_root_dev) : 0; if (ret) goto register_err; ret = ccw_driver_register(&claw_ccw_driver); if (ret) goto ccw_err; claw_group_driver.driver.groups = claw_group_attr_groups; ret = ccwgroup_driver_register(&claw_group_driver); if (ret) goto ccwgroup_err; return 0; ccwgroup_err: ccw_driver_unregister(&claw_ccw_driver); ccw_err: root_device_unregister(claw_root_dev); register_err: CLAW_DBF_TEXT(2, setup, "init_bad"); claw_unregister_debug_facility(); out_err: pr_err("Initializing the claw device driver failed\n"); return ret; } module_init(claw_init); module_exit(claw_cleanup); MODULE_AUTHOR("Andy Richter <richtera@us.ibm.com>"); MODULE_DESCRIPTION("Linux for System z CLAW Driver\n" \ "Copyright 2000,2008 IBM Corporation\n"); MODULE_LICENSE("GPL");