diff options
Diffstat (limited to 'drivers/s390/net/claw.c')
| -rw-r--r-- | drivers/s390/net/claw.c | 3421 |
1 files changed, 3421 insertions, 0 deletions
diff --git a/drivers/s390/net/claw.c b/drivers/s390/net/claw.c new file mode 100644 index 00000000..b41fae37 --- /dev/null +++ b/drivers/s390/net/claw.c @@ -0,0 +1,3421 @@ +/* + * 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"); |