317 lines
6.9 KiB
C
317 lines
6.9 KiB
C
/* 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
|