316 lines
6.9 KiB
C
316 lines
6.9 KiB
C
/*
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* Copyright IBM Corp. 2001, 2007
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* Authors: Fritz Elfert (felfert@millenux.com)
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* Peter Tiedemann (ptiedem@de.ibm.com)
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*/
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#ifndef _CTCM_MAIN_H_
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#define _CTCM_MAIN_H_
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#include <asm/ccwdev.h>
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#include <asm/ccwgroup.h>
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#include <linux/skbuff.h>
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#include <linux/netdevice.h>
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#include "fsm.h"
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#include "ctcm_dbug.h"
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#include "ctcm_mpc.h"
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#define CTC_DRIVER_NAME "ctcm"
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#define CTC_DEVICE_NAME "ctc"
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#define MPC_DEVICE_NAME "mpc"
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#define CTC_DEVICE_GENE CTC_DEVICE_NAME "%d"
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#define MPC_DEVICE_GENE MPC_DEVICE_NAME "%d"
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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 ctcm_pr_debug(fmt, arg...) printk(KERN_DEBUG fmt, ##arg)
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#define CTCM_PR_DEBUG(fmt, arg...) \
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do { \
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if (do_debug) \
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printk(KERN_DEBUG fmt, ##arg); \
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} while (0)
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#define CTCM_PR_DBGDATA(fmt, arg...) \
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do { \
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if (do_debug_data) \
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printk(KERN_DEBUG fmt, ##arg); \
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} while (0)
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#define CTCM_D3_DUMP(buf, len) \
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do { \
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if (do_debug_data) \
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ctcmpc_dumpit(buf, len); \
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} while (0)
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#define CTCM_CCW_DUMP(buf, len) \
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do { \
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if (do_debug_ccw) \
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ctcmpc_dumpit(buf, len); \
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} while (0)
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/**
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* Enum for classifying detected devices
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*/
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enum ctcm_channel_types {
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/* Device is not a channel */
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ctcm_channel_type_none,
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/* Device is a CTC/A */
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ctcm_channel_type_parallel,
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/* Device is a FICON channel */
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ctcm_channel_type_ficon,
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/* Device is a ESCON channel */
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ctcm_channel_type_escon
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};
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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_NOOP 0x03
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#define CCW_CMD_TIC 0x08
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#define CCW_CMD_SENSE_CMD 0x14
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#define CCW_CMD_WRITE_CTL 0x17
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#define CCW_CMD_SET_EXTENDED 0xc3
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#define CCW_CMD_PREPARE 0xe3
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#define CTCM_PROTO_S390 0
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#define CTCM_PROTO_LINUX 1
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#define CTCM_PROTO_LINUX_TTY 2
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#define CTCM_PROTO_OS390 3
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#define CTCM_PROTO_MPC 4
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#define CTCM_PROTO_MAX 4
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#define CTCM_BUFSIZE_LIMIT 65535
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#define CTCM_BUFSIZE_DEFAULT 32768
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#define MPC_BUFSIZE_DEFAULT CTCM_BUFSIZE_LIMIT
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#define CTCM_TIME_1_SEC 1000
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#define CTCM_TIME_5_SEC 5000
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#define CTCM_TIME_10_SEC 10000
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#define CTCM_INITIAL_BLOCKLEN 2
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#define CTCM_READ 0
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#define CTCM_WRITE 1
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#define CTCM_ID_SIZE 20+3
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struct ctcm_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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unsigned long 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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struct channel *next;
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char id[CTCM_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 ctcm_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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__u16 protocol; /* protocol of this channel (4 = MPC) */
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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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struct sk_buff *trans_skb; /* transmit/receive buffer */
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struct sk_buff_head io_queue; /* universal I/O queue */
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struct tasklet_struct ch_tasklet; /* MPC ONLY */
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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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/* MPC ONLY section begin */
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__u32 th_seq_num; /* SNA TH seq number */
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__u8 th_seg;
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__u32 pdu_seq;
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struct sk_buff *xid_skb;
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char *xid_skb_data;
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struct th_header *xid_th;
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struct xid2 *xid;
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char *xid_id;
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struct th_header *rcvd_xid_th;
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struct xid2 *rcvd_xid;
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char *rcvd_xid_id;
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__u8 in_mpcgroup;
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fsm_timer sweep_timer;
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struct sk_buff_head sweep_queue;
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struct th_header *discontact_th;
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struct tasklet_struct ch_disc_tasklet;
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/* MPC ONLY section end */
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int retry; /* retry counter for misc. operations */
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fsm_instance *fsm; /* finite state machine of this channel */
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struct net_device *netdev; /* corresponding net_device */
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struct ctcm_profile prof;
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__u8 *trans_skb_data;
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__u16 logflags;
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__u8 sense_rc; /* last unit check sense code report control */
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};
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struct ctcm_priv {
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struct net_device_stats stats;
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unsigned long tbusy;
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/* The MPC group struct of this interface */
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struct mpc_group *mpcg; /* MPC only */
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struct xid2 *xid; /* MPC only */
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/* The finite state machine of this interface */
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fsm_instance *fsm;
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/* The protocol of this device */
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__u16 protocol;
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/* Timer for restarting after I/O Errors */
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fsm_timer restart_timer;
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int buffer_size; /* ctc only */
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struct channel *channel[2];
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};
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int ctcm_open(struct net_device *dev);
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int ctcm_close(struct net_device *dev);
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extern const struct attribute_group *ctcm_attr_groups[];
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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 ctcm_clear_busy_do(struct net_device *dev)
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{
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clear_bit(0, &(((struct ctcm_priv *)dev->ml_priv)->tbusy));
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netif_wake_queue(dev);
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}
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static inline void ctcm_clear_busy(struct net_device *dev)
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{
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struct mpc_group *grp;
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grp = ((struct ctcm_priv *)dev->ml_priv)->mpcg;
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if (!(grp && grp->in_sweep))
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ctcm_clear_busy_do(dev);
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}
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static inline int ctcm_test_and_set_busy(struct net_device *dev)
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{
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netif_stop_queue(dev);
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return test_and_set_bit(0,
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&(((struct ctcm_priv *)dev->ml_priv)->tbusy));
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}
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extern int loglevel;
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extern struct channel *channels;
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void ctcm_unpack_skb(struct channel *ch, struct sk_buff *pskb);
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/*
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* Functions related to setup and device detection.
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*/
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static inline int ctcm_less_than(char *id1, char *id2)
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{
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unsigned long dev1, dev2;
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id1 = id1 + 5;
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id2 = id2 + 5;
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dev1 = simple_strtoul(id1, &id1, 16);
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dev2 = simple_strtoul(id2, &id2, 16);
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return (dev1 < dev2);
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}
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int ctcm_ch_alloc_buffer(struct channel *ch);
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static inline int ctcm_checkalloc_buffer(struct channel *ch)
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{
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if (ch->trans_skb == NULL)
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return ctcm_ch_alloc_buffer(ch);
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if (ch->flags & CHANNEL_FLAGS_BUFSIZE_CHANGED) {
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dev_kfree_skb(ch->trans_skb);
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return ctcm_ch_alloc_buffer(ch);
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}
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return 0;
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}
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struct mpc_group *ctcmpc_init_mpc_group(struct ctcm_priv *priv);
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/* test if protocol attribute (of struct ctcm_priv or struct channel)
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* has MPC protocol setting. Type is not checked
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*/
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#define IS_MPC(p) ((p)->protocol == CTCM_PROTO_MPC)
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/* test if struct ctcm_priv of struct net_device has MPC protocol setting */
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#define IS_MPCDEV(dev) IS_MPC((struct ctcm_priv *)dev->ml_priv)
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static inline gfp_t gfp_type(void)
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{
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return in_interrupt() ? GFP_ATOMIC : GFP_KERNEL;
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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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#endif
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