| /* |
| * 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 <linux/kernel_stat.h> |
| #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, |
| }; |
| |
| 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; |
| |
| kstat_cpu(smp_processor_id()).irqs[IOINT_CLW]++; |
| 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"); |