Orange Pi5 kernel

/* 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