[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>
This commit is contained in:
Frank Pavlic
Jeff Garzik
parent
7f81947b46
commit
7394c928c8
@ -1,6 +1,6 @@
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/*
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*
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* linux/drivers/s390/net/ctcdbug.h ($Revision: 1.4 $)
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* linux/drivers/s390/net/ctcdbug.h ($Revision: 1.5 $)
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*
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* CTC / ESCON network driver - s390 dbf exploit.
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*
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@ -9,7 +9,7 @@
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* Author(s): Original Code written by
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* Peter Tiedemann (ptiedem@de.ibm.com)
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*
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* $Revision: 1.4 $ $Date: 2004/10/15 09:26:58 $
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* $Revision: 1.5 $ $Date: 2005/02/27 19:46:44 $
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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@ -25,9 +25,11 @@
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef _CTCDBUG_H_
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#define _CTCDBUG_H_
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#include <asm/debug.h>
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#include "ctcmain.h"
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/**
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* Debug Facility stuff
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*/
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@ -41,7 +43,7 @@
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#define CTC_DBF_DATA_LEN 128
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#define CTC_DBF_DATA_INDEX 3
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#define CTC_DBF_DATA_NR_AREAS 1
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#define CTC_DBF_DATA_LEVEL 2
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#define CTC_DBF_DATA_LEVEL 3
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#define CTC_DBF_TRACE_NAME "ctc_trace"
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#define CTC_DBF_TRACE_LEN 16
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@ -121,3 +123,5 @@ hex_dump(unsigned char *buf, size_t len)
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printk("\n");
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}
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#endif
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@ -1,5 +1,5 @@
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/*
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* $Id: ctcmain.c,v 1.72 2005/03/17 10:51:52 ptiedem Exp $
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* $Id: ctcmain.c,v 1.74 2005/03/24 09:04:17 mschwide Exp $
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*
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* CTC / ESCON network driver
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*
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@ -37,12 +37,11 @@
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* RELEASE-TAG: CTC/ESCON network driver $Revision: 1.72 $
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* RELEASE-TAG: CTC/ESCON network driver $Revision: 1.74 $
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*
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*/
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#undef DEBUG
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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@ -74,288 +73,13 @@
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#include "ctctty.h"
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#include "fsm.h"
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#include "cu3088.h"
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#include "ctcdbug.h"
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#include "ctcmain.h"
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MODULE_AUTHOR("(C) 2000 IBM Corp. by Fritz Elfert (felfert@millenux.com)");
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MODULE_DESCRIPTION("Linux for S/390 CTC/Escon Driver");
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MODULE_LICENSE("GPL");
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/**
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* CCW commands, used in this driver.
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*/
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#define CCW_CMD_WRITE 0x01
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#define CCW_CMD_READ 0x02
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#define CCW_CMD_SET_EXTENDED 0xc3
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#define CCW_CMD_PREPARE 0xe3
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#define CTC_PROTO_S390 0
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#define CTC_PROTO_LINUX 1
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#define CTC_PROTO_LINUX_TTY 2
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#define CTC_PROTO_OS390 3
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#define CTC_PROTO_MAX 3
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#define CTC_BUFSIZE_LIMIT 65535
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#define CTC_BUFSIZE_DEFAULT 32768
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#define CTC_TIMEOUT_5SEC 5000
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#define CTC_INITIAL_BLOCKLEN 2
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#define READ 0
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#define WRITE 1
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#define CTC_ID_SIZE BUS_ID_SIZE+3
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struct ctc_profile {
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unsigned long maxmulti;
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unsigned long maxcqueue;
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unsigned long doios_single;
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unsigned long doios_multi;
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unsigned long txlen;
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unsigned long tx_time;
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struct timespec send_stamp;
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};
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/**
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* Definition of one channel
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*/
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struct channel {
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/**
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* Pointer to next channel in list.
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*/
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struct channel *next;
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char id[CTC_ID_SIZE];
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struct ccw_device *cdev;
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/**
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* Type of this channel.
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* CTC/A or Escon for valid channels.
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*/
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enum channel_types type;
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/**
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* Misc. flags. See CHANNEL_FLAGS_... below
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*/
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__u32 flags;
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/**
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* The protocol of this channel
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*/
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__u16 protocol;
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/**
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* I/O and irq related stuff
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*/
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struct ccw1 *ccw;
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struct irb *irb;
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/**
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* RX/TX buffer size
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*/
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int max_bufsize;
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/**
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* Transmit/Receive buffer.
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*/
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struct sk_buff *trans_skb;
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/**
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* Universal I/O queue.
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*/
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struct sk_buff_head io_queue;
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/**
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* TX queue for collecting skb's during busy.
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*/
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struct sk_buff_head collect_queue;
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/**
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* Amount of data in collect_queue.
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*/
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int collect_len;
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/**
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* spinlock for collect_queue and collect_len
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*/
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spinlock_t collect_lock;
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/**
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* Timer for detecting unresposive
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* I/O operations.
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*/
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fsm_timer timer;
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/**
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* Retry counter for misc. operations.
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*/
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int retry;
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/**
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* The finite state machine of this channel
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*/
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fsm_instance *fsm;
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/**
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* The corresponding net_device this channel
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* belongs to.
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*/
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struct net_device *netdev;
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struct ctc_profile prof;
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unsigned char *trans_skb_data;
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__u16 logflags;
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};
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#define CHANNEL_FLAGS_READ 0
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#define CHANNEL_FLAGS_WRITE 1
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#define CHANNEL_FLAGS_INUSE 2
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#define CHANNEL_FLAGS_BUFSIZE_CHANGED 4
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#define CHANNEL_FLAGS_FAILED 8
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#define CHANNEL_FLAGS_WAITIRQ 16
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#define CHANNEL_FLAGS_RWMASK 1
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#define CHANNEL_DIRECTION(f) (f & CHANNEL_FLAGS_RWMASK)
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#define LOG_FLAG_ILLEGALPKT 1
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#define LOG_FLAG_ILLEGALSIZE 2
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#define LOG_FLAG_OVERRUN 4
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#define LOG_FLAG_NOMEM 8
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#define CTC_LOGLEVEL_INFO 1
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#define CTC_LOGLEVEL_NOTICE 2
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#define CTC_LOGLEVEL_WARN 4
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#define CTC_LOGLEVEL_EMERG 8
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#define CTC_LOGLEVEL_ERR 16
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#define CTC_LOGLEVEL_DEBUG 32
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#define CTC_LOGLEVEL_CRIT 64
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#define CTC_LOGLEVEL_DEFAULT \
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(CTC_LOGLEVEL_INFO | CTC_LOGLEVEL_NOTICE | CTC_LOGLEVEL_WARN | CTC_LOGLEVEL_CRIT)
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#define CTC_LOGLEVEL_MAX ((CTC_LOGLEVEL_CRIT<<1)-1)
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static int loglevel = CTC_LOGLEVEL_DEFAULT;
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#define ctc_pr_debug(fmt, arg...) \
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do { if (loglevel & CTC_LOGLEVEL_DEBUG) printk(KERN_DEBUG fmt,##arg); } while (0)
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#define ctc_pr_info(fmt, arg...) \
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do { if (loglevel & CTC_LOGLEVEL_INFO) printk(KERN_INFO fmt,##arg); } while (0)
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#define ctc_pr_notice(fmt, arg...) \
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do { if (loglevel & CTC_LOGLEVEL_NOTICE) printk(KERN_NOTICE fmt,##arg); } while (0)
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#define ctc_pr_warn(fmt, arg...) \
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do { if (loglevel & CTC_LOGLEVEL_WARN) printk(KERN_WARNING fmt,##arg); } while (0)
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#define ctc_pr_emerg(fmt, arg...) \
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do { if (loglevel & CTC_LOGLEVEL_EMERG) printk(KERN_EMERG fmt,##arg); } while (0)
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#define ctc_pr_err(fmt, arg...) \
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do { if (loglevel & CTC_LOGLEVEL_ERR) printk(KERN_ERR fmt,##arg); } while (0)
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#define ctc_pr_crit(fmt, arg...) \
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do { if (loglevel & CTC_LOGLEVEL_CRIT) printk(KERN_CRIT fmt,##arg); } while (0)
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/**
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* Linked list of all detected channels.
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*/
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static struct channel *channels = NULL;
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struct ctc_priv {
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struct net_device_stats stats;
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unsigned long tbusy;
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/**
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* The finite state machine of this interface.
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*/
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fsm_instance *fsm;
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/**
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* The protocol of this device
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*/
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__u16 protocol;
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/**
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* Timer for restarting after I/O Errors
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*/
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fsm_timer restart_timer;
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int buffer_size;
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struct channel *channel[2];
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};
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/**
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* Definition of our link level header.
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*/
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struct ll_header {
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__u16 length;
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__u16 type;
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__u16 unused;
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};
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#define LL_HEADER_LENGTH (sizeof(struct ll_header))
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/**
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* Compatibility macros for busy handling
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* of network devices.
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*/
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static __inline__ void
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ctc_clear_busy(struct net_device * dev)
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{
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clear_bit(0, &(((struct ctc_priv *) dev->priv)->tbusy));
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if (((struct ctc_priv *)dev->priv)->protocol != CTC_PROTO_LINUX_TTY)
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netif_wake_queue(dev);
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}
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static __inline__ int
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ctc_test_and_set_busy(struct net_device * dev)
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{
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if (((struct ctc_priv *)dev->priv)->protocol != CTC_PROTO_LINUX_TTY)
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netif_stop_queue(dev);
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return test_and_set_bit(0, &((struct ctc_priv *) dev->priv)->tbusy);
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}
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/**
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* Print Banner.
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*/
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static void
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print_banner(void)
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{
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static int printed = 0;
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char vbuf[] = "$Revision: 1.72 $";
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char *version = vbuf;
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if (printed)
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return;
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if ((version = strchr(version, ':'))) {
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char *p = strchr(version + 1, '$');
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if (p)
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*p = '\0';
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} else
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version = " ??? ";
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printk(KERN_INFO "CTC driver Version%s"
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#ifdef DEBUG
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" (DEBUG-VERSION, " __DATE__ __TIME__ ")"
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#endif
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" initialized\n", version);
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printed = 1;
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}
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/**
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* Return type of a detected device.
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*/
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static enum channel_types
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get_channel_type(struct ccw_device_id *id)
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{
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enum channel_types type = (enum channel_types) id->driver_info;
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if (type == channel_type_ficon)
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type = channel_type_escon;
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return type;
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}
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/**
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* States of the interface statemachine.
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*/
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@ -371,7 +95,7 @@ enum dev_states {
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/**
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* MUST be always the last element!!
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*/
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NR_DEV_STATES
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CTC_NR_DEV_STATES
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};
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static const char *dev_state_names[] = {
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@ -399,7 +123,7 @@ enum dev_events {
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/**
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* MUST be always the last element!!
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*/
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NR_DEV_EVENTS
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CTC_NR_DEV_EVENTS
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};
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static const char *dev_event_names[] = {
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@ -476,40 +200,6 @@ enum ch_events {
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NR_CH_EVENTS,
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};
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static const char *ch_event_names[] = {
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"ccw_device success",
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"ccw_device busy",
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"ccw_device enodev",
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"ccw_device ioerr",
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"ccw_device unknown",
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"Status ATTN & BUSY",
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"Status ATTN",
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"Status BUSY",
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"Unit check remote reset",
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"Unit check remote system reset",
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"Unit check TX timeout",
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"Unit check TX parity",
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"Unit check Hardware failure",
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"Unit check RX parity",
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"Unit check ZERO",
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"Unit check Unknown",
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"SubChannel check Unknown",
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"Machine check failure",
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"Machine check operational",
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"IRQ normal",
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"IRQ final",
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"Timer",
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"Start",
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"Stop",
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};
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/**
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* States of the channel statemachine.
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*/
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@ -545,6 +235,87 @@ enum ch_states {
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NR_CH_STATES,
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};
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static int loglevel = CTC_LOGLEVEL_DEFAULT;
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/**
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* Linked list of all detected channels.
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*/
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static struct channel *channels = NULL;
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/**
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* Print Banner.
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*/
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static void
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print_banner(void)
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{
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static int printed = 0;
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char vbuf[] = "$Revision: 1.74 $";
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char *version = vbuf;
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if (printed)
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return;
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if ((version = strchr(version, ':'))) {
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char *p = strchr(version + 1, '$');
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if (p)
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*p = '\0';
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} else
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version = " ??? ";
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printk(KERN_INFO "CTC driver Version%s"
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#ifdef DEBUG
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" (DEBUG-VERSION, " __DATE__ __TIME__ ")"
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#endif
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" initialized\n", version);
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printed = 1;
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}
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/**
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* Return type of a detected device.
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*/
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static enum channel_types
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get_channel_type(struct ccw_device_id *id)
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{
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enum channel_types type = (enum channel_types) id->driver_info;
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if (type == channel_type_ficon)
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type = channel_type_escon;
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return type;
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}
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static const char *ch_event_names[] = {
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"ccw_device success",
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"ccw_device busy",
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"ccw_device enodev",
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"ccw_device ioerr",
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"ccw_device unknown",
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"Status ATTN & BUSY",
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"Status ATTN",
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"Status BUSY",
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"Unit check remote reset",
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"Unit check remote system reset",
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"Unit check TX timeout",
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"Unit check TX parity",
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"Unit check Hardware failure",
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"Unit check RX parity",
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"Unit check ZERO",
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"Unit check Unknown",
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"SubChannel check Unknown",
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"Machine check failure",
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"Machine check operational",
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"IRQ normal",
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"IRQ final",
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"Timer",
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"Start",
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"Stop",
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};
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static const char *ch_state_names[] = {
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"Idle",
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"Stopped",
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@ -1934,7 +1705,6 @@ add_channel(struct ccw_device *cdev, enum channel_types type)
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ch->cdev = cdev;
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snprintf(ch->id, CTC_ID_SIZE, "ch-%s", cdev->dev.bus_id);
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ch->type = type;
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loglevel = CTC_LOGLEVEL_DEFAULT;
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ch->fsm = init_fsm(ch->id, ch_state_names,
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ch_event_names, NR_CH_STATES, NR_CH_EVENTS,
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ch_fsm, CH_FSM_LEN, GFP_KERNEL);
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@ -2697,6 +2467,7 @@ ctc_stats(struct net_device * dev)
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/*
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* sysfs attributes
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*/
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static ssize_t
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buffer_show(struct device *dev, char *buf)
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{
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@ -2715,57 +2486,61 @@ buffer_write(struct device *dev, const char *buf, size_t count)
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struct ctc_priv *priv;
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struct net_device *ndev;
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int bs1;
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char buffer[16];
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DBF_TEXT(trace, 3, __FUNCTION__);
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DBF_TEXT(trace, 3, buf);
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priv = dev->driver_data;
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if (!priv)
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if (!priv) {
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DBF_TEXT(trace, 3, "bfnopriv");
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return -ENODEV;
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ndev = priv->channel[READ]->netdev;
|
||||
if (!ndev)
|
||||
return -ENODEV;
|
||||
sscanf(buf, "%u", &bs1);
|
||||
}
|
||||
|
||||
sscanf(buf, "%u", &bs1);
|
||||
if (bs1 > CTC_BUFSIZE_LIMIT)
|
||||
return -EINVAL;
|
||||
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) {
|
||||
DBF_TEXT(trace, 3, "bfnondev");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
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,
|
||||
@ -3004,6 +2716,21 @@ static struct attribute_group ctc_attr_group = {
|
||||
.attrs = ctc_attr,
|
||||
};
|
||||
|
||||
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)
|
||||
{
|
||||
@ -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;
|
||||
@ -3060,9 +2787,69 @@ 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();
|
||||
|
||||
276
drivers/s390/net/ctcmain.h
Normal file
276
drivers/s390/net/ctcmain.h
Normal file
@ -0,0 +1,276 @@
|
||||
/*
|
||||
* $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
|
||||
Loading…
Reference in New Issue
Block a user