[PATCH] s390: ctc code cleanup

[patch 5/10] s390: ctc code cleanup.

From: Peter Tiedemann <ptiedem@de.ibm.com>

ctc network driver changes:
 - Some code cleanup.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

drivers/s390/net/ctcdbug.h

 /*
  *
- * linux/drivers/s390/net/ctcdbug.h ($Revision: 1.4 $)
+ * linux/drivers/s390/net/ctcdbug.h ($Revision: 1.5 $)
  *
  * CTC / ESCON network driver - s390 dbf exploit.
  *
@@ -9,7 +9,7 @@
  *    Author(s): Original Code written by
  *			  Peter Tiedemann (ptiedem@de.ibm.com)
  *
- *    $Revision: 1.4 $	 $Date: 2004/10/15 09:26:58 $
+ *    $Revision: 1.5 $	 $Date: 2005/02/27 19:46:44 $
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -25,9 +25,11 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
-
+#ifndef _CTCDBUG_H_
+#define _CTCDBUG_H_
 
 #include <asm/debug.h>
+#include "ctcmain.h"
 /**
  * Debug Facility stuff
  */
@@ -41,7 +43,7 @@
 #define CTC_DBF_DATA_LEN 128
 #define CTC_DBF_DATA_INDEX 3
 #define CTC_DBF_DATA_NR_AREAS 1
-#define CTC_DBF_DATA_LEVEL 2
+#define CTC_DBF_DATA_LEVEL 3
 
 #define CTC_DBF_TRACE_NAME "ctc_trace"
 #define CTC_DBF_TRACE_LEN 16
@@ -121,3 +123,5 @@ hex_dump(unsigned char *buf, size_t len)
 	printk("\n");
 }
 
+
+#endif

drivers/s390/net/ctcmain.h

+/*
+ * $Id: ctcmain.h,v 1.4 2005/03/24 09:04:17 mschwide Exp $
+ *
+ * CTC / ESCON network driver
+ *
+ * Copyright (C) 2001 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ * Author(s): Fritz Elfert (elfert@de.ibm.com, felfert@millenux.com)
+	      Peter Tiedemann (ptiedem@de.ibm.com)
+ *
+ *
+ * Documentation used:
+ *  - Principles of Operation (IBM doc#: SA22-7201-06)
+ *  - Common IO/-Device Commands and Self Description (IBM doc#: SA22-7204-02)
+ *  - Common IO/-Device Commands and Self Description (IBM doc#: SN22-5535)
+ *  - ESCON Channel-to-Channel Adapter (IBM doc#: SA22-7203-00)
+ *  - ESCON I/O Interface (IBM doc#: SA22-7202-029
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * 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: 1.4 $
+ *
+ */
+
+#ifndef _CTCMAIN_H_
+#define _CTCMAIN_H_
+
+#include <asm/ccwdev.h>
+#include <asm/ccwgroup.h>
+
+#include "ctctty.h"
+#include "fsm.h"
+#include "cu3088.h"
+
+
+/**
+ * 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)
+
+#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)
+
+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);
+}
+
+#endif