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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright IBM Corp. 2001, 2007
* Authors: Fritz Elfert (felfert@millenux.com)
* Peter Tiedemann (ptiedem@de.ibm.com)
*/
#ifndef _CTCM_MAIN_H_
#define _CTCM_MAIN_H_
#include <asm/ccwdev.h>
#include <asm/ccwgroup.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include "fsm.h"
#include "ctcm_dbug.h"
#include "ctcm_mpc.h"
#define CTC_DRIVER_NAME "ctcm"
#define CTC_DEVICE_NAME "ctc"
#define MPC_DEVICE_NAME "mpc"
#define CTC_DEVICE_GENE CTC_DEVICE_NAME "%d"
#define MPC_DEVICE_GENE MPC_DEVICE_NAME "%d"
#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 ctcm_pr_debug(fmt, arg...) printk(KERN_DEBUG fmt, ##arg)
#define CTCM_PR_DEBUG(fmt, arg...) \
do { \
if (do_debug) \
printk(KERN_DEBUG fmt, ##arg); \
} while (0)
#define CTCM_PR_DBGDATA(fmt, arg...) \
do { \
if (do_debug_data) \
printk(KERN_DEBUG fmt, ##arg); \
} while (0)
#define CTCM_D3_DUMP(buf, len) \
do { \
if (do_debug_data) \
ctcmpc_dumpit(buf, len); \
} while (0)
#define CTCM_CCW_DUMP(buf, len) \
do { \
if (do_debug_ccw) \
ctcmpc_dumpit(buf, len); \
} while (0)
/**
* Enum for classifying detected devices
*/
enum ctcm_channel_types {
/* Device is not a channel */
ctcm_channel_type_none,
/* Device is a CTC/A */
ctcm_channel_type_parallel,
/* Device is a FICON channel */
ctcm_channel_type_ficon,
/* Device is a ESCON channel */
ctcm_channel_type_escon
};
/*
* CCW commands, used in this driver.
*/
#define CCW_CMD_WRITE 0x01
#define CCW_CMD_READ 0x02
#define CCW_CMD_NOOP 0x03
#define CCW_CMD_TIC 0x08
#define CCW_CMD_SENSE_CMD 0x14
#define CCW_CMD_WRITE_CTL 0x17
#define CCW_CMD_SET_EXTENDED 0xc3
#define CCW_CMD_PREPARE 0xe3
#define CTCM_PROTO_S390 0
#define CTCM_PROTO_LINUX 1
#define CTCM_PROTO_LINUX_TTY 2
#define CTCM_PROTO_OS390 3
#define CTCM_PROTO_MPC 4
#define CTCM_PROTO_MAX 4
#define CTCM_BUFSIZE_LIMIT 65535
#define CTCM_BUFSIZE_DEFAULT 32768
#define MPC_BUFSIZE_DEFAULT CTCM_BUFSIZE_LIMIT
#define CTCM_TIME_1_SEC 1000
#define CTCM_TIME_5_SEC 5000
#define CTCM_TIME_10_SEC 10000
#define CTCM_INITIAL_BLOCKLEN 2
#define CTCM_READ 0
#define CTCM_WRITE 1
#define CTCM_ID_SIZE 20+3
struct ctcm_profile {
unsigned long maxmulti;
unsigned long maxcqueue;
unsigned long doios_single;
unsigned long doios_multi;
unsigned long txlen;
unsigned long tx_time;
unsigned long send_stamp;
};
/*
* Definition of one channel
*/
struct channel {
struct channel *next;
char id[CTCM_ID_SIZE];
struct ccw_device *cdev;
/*
* Type of this channel.
* CTC/A or Escon for valid channels.
*/
enum ctcm_channel_types type;
/*
* Misc. flags. See CHANNEL_FLAGS_... below
*/
__u32 flags;
__u16 protocol; /* protocol of this channel (4 = MPC) */
/*
* I/O and irq related stuff
*/
struct ccw1 *ccw;
struct irb *irb;
/*
* RX/TX buffer size
*/
int max_bufsize;
struct sk_buff *trans_skb; /* transmit/receive buffer */
struct sk_buff_head io_queue; /* universal I/O queue */
struct tasklet_struct ch_tasklet; /* MPC ONLY */
/*
* 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;
/* MPC ONLY section begin */
__u32 th_seq_num; /* SNA TH seq number */
__u8 th_seg;
__u32 pdu_seq;
struct sk_buff *xid_skb;
char *xid_skb_data;
struct th_header *xid_th;
struct xid2 *xid;
char *xid_id;
struct th_header *rcvd_xid_th;
struct xid2 *rcvd_xid;
char *rcvd_xid_id;
__u8 in_mpcgroup;
fsm_timer sweep_timer;
struct sk_buff_head sweep_queue;
struct th_header *discontact_th;
struct tasklet_struct ch_disc_tasklet;
/* MPC ONLY section end */
int retry; /* retry counter for misc. operations */
fsm_instance *fsm; /* finite state machine of this channel */
struct net_device *netdev; /* corresponding net_device */
struct ctcm_profile prof;
__u8 *trans_skb_data;
__u16 logflags;
__u8 sense_rc; /* last unit check sense code report control */
};
struct ctcm_priv {
struct net_device_stats stats;
unsigned long tbusy;
/* The MPC group struct of this interface */
struct mpc_group *mpcg; /* MPC only */
struct xid2 *xid; /* MPC only */
/* 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; /* ctc only */
struct channel *channel[2];
};
int ctcm_open(struct net_device *dev);
int ctcm_close(struct net_device *dev);
extern const struct attribute_group *ctcm_attr_groups[];
/*
* Compatibility macros for busy handling
* of network devices.
*/
static inline void ctcm_clear_busy_do(struct net_device *dev)
{
clear_bit(0, &(((struct ctcm_priv *)dev->ml_priv)->tbusy));
netif_wake_queue(dev);
}
static inline void ctcm_clear_busy(struct net_device *dev)
{
struct mpc_group *grp;
grp = ((struct ctcm_priv *)dev->ml_priv)->mpcg;
if (!(grp && grp->in_sweep))
ctcm_clear_busy_do(dev);
}
static inline int ctcm_test_and_set_busy(struct net_device *dev)
{
netif_stop_queue(dev);
return test_and_set_bit(0,
&(((struct ctcm_priv *)dev->ml_priv)->tbusy));
}
extern int loglevel;
extern struct channel *channels;
void ctcm_unpack_skb(struct channel *ch, struct sk_buff *pskb);
/*
* Functions related to setup and device detection.
*/
static inline int ctcm_less_than(char *id1, char *id2)
{
unsigned long dev1, dev2;
id1 = id1 + 5;
id2 = id2 + 5;
dev1 = simple_strtoul(id1, &id1, 16);
dev2 = simple_strtoul(id2, &id2, 16);
return (dev1 < dev2);
}
int ctcm_ch_alloc_buffer(struct channel *ch);
static inline int ctcm_checkalloc_buffer(struct channel *ch)
{
if (ch->trans_skb == NULL)
return ctcm_ch_alloc_buffer(ch);
if (ch->flags & CHANNEL_FLAGS_BUFSIZE_CHANGED) {
dev_kfree_skb(ch->trans_skb);
return ctcm_ch_alloc_buffer(ch);
}
return 0;
}
struct mpc_group *ctcmpc_init_mpc_group(struct ctcm_priv *priv);
/* test if protocol attribute (of struct ctcm_priv or struct channel)
* has MPC protocol setting. Type is not checked
*/
#define IS_MPC(p) ((p)->protocol == CTCM_PROTO_MPC)
/* test if struct ctcm_priv of struct net_device has MPC protocol setting */
#define IS_MPCDEV(dev) IS_MPC((struct ctcm_priv *)dev->ml_priv)
static inline gfp_t gfp_type(void)
{
return in_interrupt() ? GFP_ATOMIC : GFP_KERNEL;
}
/*
* Definition of our link level header.
*/
struct ll_header {
__u16 length;
__u16 type;
__u16 unused;
};
#define LL_HEADER_LENGTH (sizeof(struct ll_header))
#endif
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