/*
* 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.
*
*/
#ifndef _CTCMAIN_H_
#define _CTCMAIN_H_
#include <asm/ccwdev.h>
#include <asm/ccwgroup.h>
#include <linux/skbuff.h>
#include <linux/netdevice.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_OS390 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));
netif_wake_queue(dev);
}
static __inline__ int
ctc_test_and_set_busy(struct net_device * dev)
{
netif_stop_queue(dev);
return test_and_set_bit(0, &((struct ctc_priv *) dev->priv)->tbusy);
}
#endif
