cregit-Linux how code gets into the kernel

Release 4.7 drivers/scsi/snic/snic_disc.h

/*
 * Copyright 2014 Cisco Systems, Inc.  All rights reserved.
 *
 * This program is free software; you may redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#ifndef __SNIC_DISC_H

#define __SNIC_DISC_H

#include "snic_fwint.h"


enum snic_disc_state {
	
SNIC_DISC_NONE,
	
SNIC_DISC_INIT,
	
SNIC_DISC_PENDING,
	
SNIC_DISC_DONE
};

struct snic;

struct snic_disc {
	
struct list_head tgt_list;
	
enum snic_disc_state state;
	
struct mutex mutex;
	
u16	disc_id;
	
u8	req_cnt;
	
u32	nxt_tgt_id;
	
u32	rtgt_cnt;
	
u8	*rtgt_info;
	
struct delayed_work disc_timeout;
	
void (*cb)(struct snic *);
};


#define SNIC_TGT_NAM_LEN	16


enum snic_tgt_state {
	
SNIC_TGT_STAT_NONE,
	
SNIC_TGT_STAT_INIT,
	
SNIC_TGT_STAT_ONLINE,	/* Target is Online */
	
SNIC_TGT_STAT_OFFLINE,	/* Target is Offline */
	
SNIC_TGT_STAT_DEL,
};


struct snic_tgt_priv {
	
struct list_head list;
	
enum snic_tgt_type typ;
	
u16 disc_id;
	
char *name[SNIC_TGT_NAM_LEN];

	union {
		/*DAS Target specific info */
		/*SAN Target specific info */
		
u8 dummmy;
	} 
u;
};

/* snic tgt flags */

#define SNIC_TGT_SCAN_PENDING	0x01


struct snic_tgt {
	
struct list_head list;
	
u16	id;
	
u16	channel;
	
u32	flags;
	
u32	scsi_tgt_id;
	
enum snic_tgt_state state;
	
struct device dev;
	
struct work_struct scan_work;
	
struct work_struct del_work;
	
struct snic_tgt_priv tdata;
};


struct snic_fw_req;

void snic_disc_init(struct snic_disc *);
int snic_disc_start(struct snic *);
void snic_disc_term(struct snic *);
int snic_report_tgt_cmpl_handler(struct snic *, struct snic_fw_req *);
int snic_tgtinfo_cmpl_handler(struct snic *snic, struct snic_fw_req *fwreq);
void snic_process_report_tgts_rsp(struct work_struct *);
void snic_handle_tgt_disc(struct work_struct *);
void snic_handle_disc(struct work_struct *);
void snic_tgt_dev_release(struct device *);
void snic_tgt_del_all(struct snic *);


#define dev_to_tgt(d) \
	container_of(d, struct snic_tgt, dev)


static inline int is_snic_target(struct device *dev) { return dev->release == snic_tgt_dev_release; }

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#define starget_to_tgt(st) \ (is_snic_target(((struct scsi_target *) st)->dev.parent) ? \ dev_to_tgt(st->dev.parent) : NULL) #define snic_tgt_to_shost(t) \ dev_to_shost(t->dev.parent)
static inline int snic_tgt_chkready(struct snic_tgt *tgt) { if (tgt->state == SNIC_TGT_STAT_ONLINE) return 0; else return DID_NO_CONNECT << 16; }

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const char *snic_tgt_state_to_str(int); int snic_tgt_scsi_abort_io(struct snic_tgt *); #endif /* end of __SNIC_DISC_H */

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