diff options
Diffstat (limited to 'drivers/s390/net/ctcmain.c')
| -rw-r--r-- | drivers/s390/net/ctcmain.c | 616 |
1 files changed, 206 insertions, 410 deletions
diff --git a/drivers/s390/net/ctcmain.c b/drivers/s390/net/ctcmain.c index 7266bf5ea659..ff3e95e07e89 100644 --- a/drivers/s390/net/ctcmain.c +++ b/drivers/s390/net/ctcmain.c @@ -1,5 +1,5 @@ /* - * $Id: ctcmain.c,v 1.72 2005/03/17 10:51:52 ptiedem Exp $ + * $Id: ctcmain.c,v 1.74 2005/03/24 09:04:17 mschwide Exp $ * * CTC / ESCON network driver * @@ -37,12 +37,11 @@ * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * - * RELEASE-TAG: CTC/ESCON network driver $Revision: 1.72 $ + * RELEASE-TAG: CTC/ESCON network driver $Revision: 1.74 $ * */ #undef DEBUG - #include <linux/module.h> #include <linux/init.h> #include <linux/kernel.h> @@ -74,288 +73,13 @@ #include "ctctty.h" #include "fsm.h" #include "cu3088.h" + #include "ctcdbug.h" +#include "ctcmain.h" MODULE_AUTHOR("(C) 2000 IBM Corp. by Fritz Elfert (felfert@millenux.com)"); MODULE_DESCRIPTION("Linux for S/390 CTC/Escon Driver"); MODULE_LICENSE("GPL"); - -/** - * CCW commands, used in this driver. - */ -#define CCW_CMD_WRITE 0x01 -#define CCW_CMD_READ 0x02 -#define CCW_CMD_SET_EXTENDED 0xc3 -#define CCW_CMD_PREPARE 0xe3 - -#define CTC_PROTO_S390 0 -#define CTC_PROTO_LINUX 1 -#define CTC_PROTO_LINUX_TTY 2 -#define CTC_PROTO_OS390 3 -#define CTC_PROTO_MAX 3 - -#define CTC_BUFSIZE_LIMIT 65535 -#define CTC_BUFSIZE_DEFAULT 32768 - -#define CTC_TIMEOUT_5SEC 5000 - -#define CTC_INITIAL_BLOCKLEN 2 - -#define READ 0 -#define WRITE 1 - -#define CTC_ID_SIZE BUS_ID_SIZE+3 - - -struct ctc_profile { - unsigned long maxmulti; - unsigned long maxcqueue; - unsigned long doios_single; - unsigned long doios_multi; - unsigned long txlen; - unsigned long tx_time; - struct timespec send_stamp; -}; - -/** - * Definition of one channel - */ -struct channel { - - /** - * Pointer to next channel in list. - */ - struct channel *next; - char id[CTC_ID_SIZE]; - struct ccw_device *cdev; - - /** - * Type of this channel. - * CTC/A or Escon for valid channels. - */ - enum channel_types type; - - /** - * Misc. flags. See CHANNEL_FLAGS_... below - */ - __u32 flags; - - /** - * The protocol of this channel - */ - __u16 protocol; - - /** - * I/O and irq related stuff - */ - struct ccw1 *ccw; - struct irb *irb; - - /** - * RX/TX buffer size - */ - int max_bufsize; - - /** - * Transmit/Receive buffer. - */ - struct sk_buff *trans_skb; - - /** - * Universal I/O queue. - */ - struct sk_buff_head io_queue; - - /** - * TX queue for collecting skb's during busy. - */ - struct sk_buff_head collect_queue; - - /** - * Amount of data in collect_queue. - */ - int collect_len; - - /** - * spinlock for collect_queue and collect_len - */ - spinlock_t collect_lock; - - /** - * Timer for detecting unresposive - * I/O operations. - */ - fsm_timer timer; - - /** - * Retry counter for misc. operations. - */ - int retry; - - /** - * The finite state machine of this channel - */ - fsm_instance *fsm; - - /** - * The corresponding net_device this channel - * belongs to. - */ - struct net_device *netdev; - - struct ctc_profile prof; - - unsigned char *trans_skb_data; - - __u16 logflags; -}; - -#define CHANNEL_FLAGS_READ 0 -#define CHANNEL_FLAGS_WRITE 1 -#define CHANNEL_FLAGS_INUSE 2 -#define CHANNEL_FLAGS_BUFSIZE_CHANGED 4 -#define CHANNEL_FLAGS_FAILED 8 -#define CHANNEL_FLAGS_WAITIRQ 16 -#define CHANNEL_FLAGS_RWMASK 1 -#define CHANNEL_DIRECTION(f) (f & CHANNEL_FLAGS_RWMASK) - -#define LOG_FLAG_ILLEGALPKT 1 -#define LOG_FLAG_ILLEGALSIZE 2 -#define LOG_FLAG_OVERRUN 4 -#define LOG_FLAG_NOMEM 8 - -#define CTC_LOGLEVEL_INFO 1 -#define CTC_LOGLEVEL_NOTICE 2 -#define CTC_LOGLEVEL_WARN 4 -#define CTC_LOGLEVEL_EMERG 8 -#define CTC_LOGLEVEL_ERR 16 -#define CTC_LOGLEVEL_DEBUG 32 -#define CTC_LOGLEVEL_CRIT 64 - -#define CTC_LOGLEVEL_DEFAULT \ -(CTC_LOGLEVEL_INFO | CTC_LOGLEVEL_NOTICE | CTC_LOGLEVEL_WARN | CTC_LOGLEVEL_CRIT) - -#define CTC_LOGLEVEL_MAX ((CTC_LOGLEVEL_CRIT<<1)-1) - -static int loglevel = CTC_LOGLEVEL_DEFAULT; - -#define ctc_pr_debug(fmt, arg...) \ -do { if (loglevel & CTC_LOGLEVEL_DEBUG) printk(KERN_DEBUG fmt,##arg); } while (0) - -#define ctc_pr_info(fmt, arg...) \ -do { if (loglevel & CTC_LOGLEVEL_INFO) printk(KERN_INFO fmt,##arg); } while (0) - -#define ctc_pr_notice(fmt, arg...) \ -do { if (loglevel & CTC_LOGLEVEL_NOTICE) printk(KERN_NOTICE fmt,##arg); } while (0) - -#define ctc_pr_warn(fmt, arg...) \ -do { if (loglevel & CTC_LOGLEVEL_WARN) printk(KERN_WARNING fmt,##arg); } while (0) - -#define ctc_pr_emerg(fmt, arg...) \ -do { if (loglevel & CTC_LOGLEVEL_EMERG) printk(KERN_EMERG fmt,##arg); } while (0) - -#define ctc_pr_err(fmt, arg...) \ -do { if (loglevel & CTC_LOGLEVEL_ERR) printk(KERN_ERR fmt,##arg); } while (0) - -#define ctc_pr_crit(fmt, arg...) \ -do { if (loglevel & CTC_LOGLEVEL_CRIT) printk(KERN_CRIT fmt,##arg); } while (0) - -/** - * Linked list of all detected channels. - */ -static struct channel *channels = NULL; - -struct ctc_priv { - struct net_device_stats stats; - unsigned long tbusy; - /** - * The finite state machine of this interface. - */ - fsm_instance *fsm; - /** - * The protocol of this device - */ - __u16 protocol; - /** - * Timer for restarting after I/O Errors - */ - fsm_timer restart_timer; - - int buffer_size; - - struct channel *channel[2]; -}; - -/** - * Definition of our link level header. - */ -struct ll_header { - __u16 length; - __u16 type; - __u16 unused; -}; -#define LL_HEADER_LENGTH (sizeof(struct ll_header)) - -/** - * Compatibility macros for busy handling - * of network devices. - */ -static __inline__ void -ctc_clear_busy(struct net_device * dev) -{ - clear_bit(0, &(((struct ctc_priv *) dev->priv)->tbusy)); - if (((struct ctc_priv *)dev->priv)->protocol != CTC_PROTO_LINUX_TTY) - netif_wake_queue(dev); -} - -static __inline__ int -ctc_test_and_set_busy(struct net_device * dev) -{ - if (((struct ctc_priv *)dev->priv)->protocol != CTC_PROTO_LINUX_TTY) - netif_stop_queue(dev); - return test_and_set_bit(0, &((struct ctc_priv *) dev->priv)->tbusy); -} - -/** - * Print Banner. - */ -static void -print_banner(void) -{ - static int printed = 0; - char vbuf[] = "$Revision: 1.72 $"; - char *version = vbuf; - - if (printed) - return; - if ((version = strchr(version, ':'))) { - char *p = strchr(version + 1, '$'); - if (p) - *p = '\0'; - } else - version = " ??? "; - printk(KERN_INFO "CTC driver Version%s" -#ifdef DEBUG - " (DEBUG-VERSION, " __DATE__ __TIME__ ")" -#endif - " initialized\n", version); - printed = 1; -} - -/** - * Return type of a detected device. - */ -static enum channel_types -get_channel_type(struct ccw_device_id *id) -{ - enum channel_types type = (enum channel_types) id->driver_info; - - if (type == channel_type_ficon) - type = channel_type_escon; - - return type; -} - /** * States of the interface statemachine. */ @@ -371,7 +95,7 @@ enum dev_states { /** * MUST be always the last element!! */ - NR_DEV_STATES + CTC_NR_DEV_STATES }; static const char *dev_state_names[] = { @@ -399,7 +123,7 @@ enum dev_events { /** * MUST be always the last element!! */ - NR_DEV_EVENTS + CTC_NR_DEV_EVENTS }; static const char *dev_event_names[] = { @@ -476,40 +200,6 @@ enum ch_events { NR_CH_EVENTS, }; -static const char *ch_event_names[] = { - "ccw_device success", - "ccw_device busy", - "ccw_device enodev", - "ccw_device ioerr", - "ccw_device unknown", - - "Status ATTN & BUSY", - "Status ATTN", - "Status BUSY", - - "Unit check remote reset", - "Unit check remote system reset", - "Unit check TX timeout", - "Unit check TX parity", - "Unit check Hardware failure", - "Unit check RX parity", - "Unit check ZERO", - "Unit check Unknown", - - "SubChannel check Unknown", - - "Machine check failure", - "Machine check operational", - - "IRQ normal", - "IRQ final", - - "Timer", - - "Start", - "Stop", -}; - /** * States of the channel statemachine. */ @@ -545,6 +235,87 @@ enum ch_states { NR_CH_STATES, }; +static int loglevel = CTC_LOGLEVEL_DEFAULT; + +/** + * Linked list of all detected channels. + */ +static struct channel *channels = NULL; + +/** + * Print Banner. + */ +static void +print_banner(void) +{ + static int printed = 0; + char vbuf[] = "$Revision: 1.74 $"; + char *version = vbuf; + + if (printed) + return; + if ((version = strchr(version, ':'))) { + char *p = strchr(version + 1, '$'); + if (p) + *p = '\0'; + } else + version = " ??? "; + printk(KERN_INFO "CTC driver Version%s" +#ifdef DEBUG + " (DEBUG-VERSION, " __DATE__ __TIME__ ")" +#endif + " initialized\n", version); + printed = 1; +} + +/** + * Return type of a detected device. + */ +static enum channel_types +get_channel_type(struct ccw_device_id *id) +{ + enum channel_types type = (enum channel_types) id->driver_info; + + if (type == channel_type_ficon) + type = channel_type_escon; + + return type; +} + +static const char *ch_event_names[] = { + "ccw_device success", + "ccw_device busy", + "ccw_device enodev", + "ccw_device ioerr", + "ccw_device unknown", + + "Status ATTN & BUSY", + "Status ATTN", + "Status BUSY", + + "Unit check remote reset", + "Unit check remote system reset", + "Unit check TX timeout", + "Unit check TX parity", + "Unit check Hardware failure", + "Unit check RX parity", + "Unit check ZERO", + "Unit check Unknown", + + "SubChannel check Unknown", + + "Machine check failure", + "Machine check operational", + + "IRQ normal", + "IRQ final", + + "Timer", + + "Start", + "Stop", +}; + static const char *ch_state_names[] = { "Idle", "Stopped", @@ -1934,7 +1705,6 @@ add_channel(struct ccw_device *cdev, enum channel_types type) ch->cdev = cdev; snprintf(ch->id, CTC_ID_SIZE, "ch-%s", cdev->dev.bus_id); ch->type = type; - loglevel = CTC_LOGLEVEL_DEFAULT; ch->fsm = init_fsm(ch->id, ch_state_names, ch_event_names, NR_CH_STATES, NR_CH_EVENTS, ch_fsm, CH_FSM_LEN, GFP_KERNEL); @@ -2697,6 +2467,7 @@ ctc_stats(struct net_device * dev) /* * sysfs attributes */ + static ssize_t buffer_show(struct device *dev, char *buf) { @@ -2715,57 +2486,61 @@ buffer_write(struct device *dev, const char *buf, size_t count) struct ctc_priv *priv; struct net_device *ndev; int bs1; + char buffer[16]; DBF_TEXT(trace, 3, __FUNCTION__); + DBF_TEXT(trace, 3, buf); priv = dev->driver_data; - if (!priv) + if (!priv) { + DBF_TEXT(trace, 3, "bfnopriv"); return -ENODEV; + } + + sscanf(buf, "%u", &bs1); + if (bs1 > CTC_BUFSIZE_LIMIT) + goto einval; + if (bs1 < (576 + LL_HEADER_LENGTH + 2)) + goto einval; + priv->buffer_size = bs1; // just to overwrite the default + ndev = priv->channel[READ]->netdev; - if (!ndev) + if (!ndev) { + DBF_TEXT(trace, 3, "bfnondev"); return -ENODEV; - sscanf(buf, "%u", &bs1); + } - if (bs1 > CTC_BUFSIZE_LIMIT) - return -EINVAL; if ((ndev->flags & IFF_RUNNING) && (bs1 < (ndev->mtu + LL_HEADER_LENGTH + 2))) - return -EINVAL; - if (bs1 < (576 + LL_HEADER_LENGTH + 2)) - return -EINVAL; + goto einval; - priv->buffer_size = bs1; - priv->channel[READ]->max_bufsize = - priv->channel[WRITE]->max_bufsize = bs1; + priv->channel[READ]->max_bufsize = bs1; + priv->channel[WRITE]->max_bufsize = bs1; if (!(ndev->flags & IFF_RUNNING)) ndev->mtu = bs1 - LL_HEADER_LENGTH - 2; priv->channel[READ]->flags |= CHANNEL_FLAGS_BUFSIZE_CHANGED; priv->channel[WRITE]->flags |= CHANNEL_FLAGS_BUFSIZE_CHANGED; + sprintf(buffer, "%d",priv->buffer_size); + DBF_TEXT(trace, 3, buffer); return count; +einval: + DBF_TEXT(trace, 3, "buff_err"); + return -EINVAL; } static ssize_t loglevel_show(struct device *dev, char *buf) { - struct ctc_priv *priv; - - priv = dev->driver_data; - if (!priv) - return -ENODEV; return sprintf(buf, "%d\n", loglevel); } static ssize_t loglevel_write(struct device *dev, const char *buf, size_t count) { - struct ctc_priv *priv; int ll1; DBF_TEXT(trace, 5, __FUNCTION__); - priv = dev->driver_data; - if (!priv) - return -ENODEV; sscanf(buf, "%i", &ll1); if ((ll1 > CTC_LOGLEVEL_MAX) || (ll1 < 0)) @@ -2835,27 +2610,6 @@ stats_write(struct device *dev, const char *buf, size_t count) return count; } -static DEVICE_ATTR(buffer, 0644, buffer_show, buffer_write); -static DEVICE_ATTR(loglevel, 0644, loglevel_show, loglevel_write); -static DEVICE_ATTR(stats, 0644, stats_show, stats_write); - -static int -ctc_add_attributes(struct device *dev) -{ -// device_create_file(dev, &dev_attr_buffer); - device_create_file(dev, &dev_attr_loglevel); - device_create_file(dev, &dev_attr_stats); - return 0; -} - -static void -ctc_remove_attributes(struct device *dev) -{ - device_remove_file(dev, &dev_attr_stats); - device_remove_file(dev, &dev_attr_loglevel); -// device_remove_file(dev, &dev_attr_buffer); -} - static void ctc_netdev_unregister(struct net_device * dev) @@ -2899,52 +2653,6 @@ ctc_free_netdevice(struct net_device * dev, int free_dev) #endif } -/** - * Initialize everything of the net device except the name and the - * channel structs. - */ -static struct net_device * -ctc_init_netdevice(struct net_device * dev, int alloc_device, - struct ctc_priv *privptr) -{ - if (!privptr) - return NULL; - - DBF_TEXT(setup, 3, __FUNCTION__); - if (alloc_device) { - dev = kmalloc(sizeof (struct net_device), GFP_KERNEL); - if (!dev) - return NULL; - memset(dev, 0, sizeof (struct net_device)); - } - - dev->priv = privptr; - privptr->fsm = init_fsm("ctcdev", dev_state_names, - dev_event_names, NR_DEV_STATES, NR_DEV_EVENTS, - dev_fsm, DEV_FSM_LEN, GFP_KERNEL); - if (privptr->fsm == NULL) { - if (alloc_device) - kfree(dev); - return NULL; - } - fsm_newstate(privptr->fsm, DEV_STATE_STOPPED); - fsm_settimer(privptr->fsm, &privptr->restart_timer); - if (dev->mtu == 0) - dev->mtu = CTC_BUFSIZE_DEFAULT - LL_HEADER_LENGTH - 2; - dev->hard_start_xmit = ctc_tx; - dev->open = ctc_open; - dev->stop = ctc_close; - dev->get_stats = ctc_stats; - dev->change_mtu = ctc_change_mtu; - dev->hard_header_len = LL_HEADER_LENGTH + 2; - dev->addr_len = 0; - dev->type = ARPHRD_SLIP; - dev->tx_queue_len = 100; - dev->flags = IFF_POINTOPOINT | IFF_NOARP; - SET_MODULE_OWNER(dev); - return dev; -} - static ssize_t ctc_proto_show(struct device *dev, char *buf) { @@ -2977,7 +2685,6 @@ ctc_proto_store(struct device *dev, const char *buf, size_t count) return count; } -static DEVICE_ATTR(protocol, 0644, ctc_proto_show, ctc_proto_store); static ssize_t ctc_type_show(struct device *dev, char *buf) @@ -2991,8 +2698,13 @@ ctc_type_show(struct device *dev, char *buf) return sprintf(buf, "%s\n", cu3088_type[cgdev->cdev[0]->id.driver_info]); } +static DEVICE_ATTR(buffer, 0644, buffer_show, buffer_write); +static DEVICE_ATTR(protocol, 0644, ctc_proto_show, ctc_proto_store); static DEVICE_ATTR(type, 0444, ctc_type_show, NULL); +static DEVICE_ATTR(loglevel, 0644, loglevel_show, loglevel_write); +static DEVICE_ATTR(stats, 0644, stats_show, stats_write); + static struct attribute *ctc_attr[] = { &dev_attr_protocol.attr, &dev_attr_type.attr, @@ -3005,6 +2717,21 @@ static struct attribute_group ctc_attr_group = { }; static int +ctc_add_attributes(struct device *dev) +{ + device_create_file(dev, &dev_attr_loglevel); + device_create_file(dev, &dev_attr_stats); + return 0; +} + +static void +ctc_remove_attributes(struct device *dev) +{ + device_remove_file(dev, &dev_attr_stats); + device_remove_file(dev, &dev_attr_loglevel); +} + +static int ctc_add_files(struct device *dev) { pr_debug("%s() called\n", __FUNCTION__); @@ -3028,15 +2755,15 @@ ctc_remove_files(struct device *dev) * * @returns 0 on success, !0 on failure. */ - static int ctc_probe_device(struct ccwgroup_device *cgdev) { struct ctc_priv *priv; int rc; + char buffer[16]; pr_debug("%s() called\n", __FUNCTION__); - DBF_TEXT(trace, 3, __FUNCTION__); + DBF_TEXT(setup, 3, __FUNCTION__); if (!get_device(&cgdev->dev)) return -ENODEV; @@ -3060,10 +2787,70 @@ ctc_probe_device(struct ccwgroup_device *cgdev) cgdev->cdev[1]->handler = ctc_irq_handler; cgdev->dev.driver_data = priv; + sprintf(buffer, "%p", priv); + DBF_TEXT(data, 3, buffer); + + sprintf(buffer, "%u", (unsigned int)sizeof(struct ctc_priv)); + DBF_TEXT(data, 3, buffer); + + sprintf(buffer, "%p", &channels); + DBF_TEXT(data, 3, buffer); + + sprintf(buffer, "%u", (unsigned int)sizeof(struct channel)); + DBF_TEXT(data, 3, buffer); + return 0; } /** + * Initialize everything of the net device except the name and the + * channel structs. + */ +static struct net_device * +ctc_init_netdevice(struct net_device * dev, int alloc_device, + struct ctc_priv *privptr) +{ + if (!privptr) + return NULL; + + DBF_TEXT(setup, 3, __FUNCTION__); + + if (alloc_device) { + dev = kmalloc(sizeof (struct net_device), GFP_KERNEL); + if (!dev) + return NULL; + memset(dev, 0, sizeof (struct net_device)); + } + + dev->priv = privptr; + privptr->fsm = init_fsm("ctcdev", dev_state_names, + dev_event_names, CTC_NR_DEV_STATES, CTC_NR_DEV_EVENTS, + dev_fsm, DEV_FSM_LEN, GFP_KERNEL); + if (privptr->fsm == NULL) { + if (alloc_device) + kfree(dev); + return NULL; + } + fsm_newstate(privptr->fsm, DEV_STATE_STOPPED); + fsm_settimer(privptr->fsm, &privptr->restart_timer); + if (dev->mtu == 0) + dev->mtu = CTC_BUFSIZE_DEFAULT - LL_HEADER_LENGTH - 2; + dev->hard_start_xmit = ctc_tx; + dev->open = ctc_open; + dev->stop = ctc_close; + dev->get_stats = ctc_stats; + dev->change_mtu = ctc_change_mtu; + dev->hard_header_len = LL_HEADER_LENGTH + 2; + dev->addr_len = 0; + dev->type = ARPHRD_SLIP; + dev->tx_queue_len = 100; + dev->flags = IFF_POINTOPOINT | IFF_NOARP; + SET_MODULE_OWNER(dev); + return dev; +} + + +/** * * Setup an interface. * @@ -3081,6 +2868,7 @@ ctc_new_device(struct ccwgroup_device *cgdev) struct ctc_priv *privptr; struct net_device *dev; int ret; + char buffer[16]; pr_debug("%s() called\n", __FUNCTION__); DBF_TEXT(setup, 3, __FUNCTION__); @@ -3089,6 +2877,9 @@ ctc_new_device(struct ccwgroup_device *cgdev) if (!privptr) return -ENODEV; + sprintf(buffer, "%d", privptr->buffer_size); + DBF_TEXT(setup, 3, buffer); + type = get_channel_type(&cgdev->cdev[0]->id); snprintf(read_id, CTC_ID_SIZE, "ch-%s", cgdev->cdev[0]->dev.bus_id); @@ -3177,9 +2968,10 @@ ctc_shutdown_device(struct ccwgroup_device *cgdev) struct ctc_priv *priv; struct net_device *ndev; - DBF_TEXT(trace, 3, __FUNCTION__); + DBF_TEXT(setup, 3, __FUNCTION__); pr_debug("%s() called\n", __FUNCTION__); + priv = cgdev->dev.driver_data; ndev = NULL; if (!priv) @@ -3215,7 +3007,6 @@ ctc_shutdown_device(struct ccwgroup_device *cgdev) channel_remove(priv->channel[READ]); if (priv->channel[WRITE]) channel_remove(priv->channel[WRITE]); - priv->channel[READ] = priv->channel[WRITE] = NULL; return 0; @@ -3228,7 +3019,7 @@ ctc_remove_device(struct ccwgroup_device *cgdev) struct ctc_priv *priv; pr_debug("%s() called\n", __FUNCTION__); - DBF_TEXT(trace, 3, __FUNCTION__); + DBF_TEXT(setup, 3, __FUNCTION__); priv = cgdev->dev.driver_data; if (!priv) @@ -3265,6 +3056,7 @@ static struct ccwgroup_driver ctc_group_driver = { static void __exit ctc_exit(void) { + DBF_TEXT(setup, 3, __FUNCTION__); unregister_cu3088_discipline(&ctc_group_driver); ctc_tty_cleanup(); ctc_unregister_dbf_views(); @@ -3282,6 +3074,10 @@ ctc_init(void) { int ret = 0; + loglevel = CTC_LOGLEVEL_DEFAULT; + + DBF_TEXT(setup, 3, __FUNCTION__); + print_banner(); ret = ctc_register_dbf_views(); |