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272 lines
6.1 KiB
272 lines
6.1 KiB
/*
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* CTC / ESCON network driver
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*
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* Copyright (C) 2001 IBM Deutschland Entwicklung GmbH, IBM Corporation
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* Author(s): Fritz Elfert (elfert@de.ibm.com, felfert@millenux.com)
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Peter Tiedemann (ptiedem@de.ibm.com)
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*
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*
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* Documentation used:
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* - Principles of Operation (IBM doc#: SA22-7201-06)
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* - Common IO/-Device Commands and Self Description (IBM doc#: SA22-7204-02)
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* - Common IO/-Device Commands and Self Description (IBM doc#: SN22-5535)
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* - ESCON Channel-to-Channel Adapter (IBM doc#: SA22-7203-00)
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* - ESCON I/O Interface (IBM doc#: SA22-7202-029
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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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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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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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*/
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#ifndef _CTCMAIN_H_
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#define _CTCMAIN_H_
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#include <asm/ccwdev.h>
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#include <asm/ccwgroup.h>
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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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/**
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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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#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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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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#endif
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