+
+/**
+ * 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
+\f
+
+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;
+
+ 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: 1.65 $";
+ char *version = vbuf;
+
+ if (printed)
+ return;
+ if ((version = strchr(version, ':'))) {
+ char *p = strchr(version + 1, '$');
+ 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;
+}
+\f
+/**
+ * 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;
+}
+\f