linux/drivers/scsi/libfc/fc_libfc.h

/*
 * Copyright(c) 2009 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Maintained at www.Open-FCoE.org
 */

#ifndef _FC_LIBFC_H_
#define _FC_LIBFC_H_

#define FC_LIBFC_LOGGING 0x01 /* General logging, not categorized */
#define FC_LPORT_LOGGING 0x02 /* lport layer logging */
#define FC_DISC_LOGGING  0x04 /* discovery layer logging */
#define FC_RPORT_LOGGING 0x08 /* rport layer logging */
#define FC_FCP_LOGGING   0x10 /* I/O path logging */
#define FC_EM_LOGGING    0x20 /* Exchange Manager logging */
#define FC_EXCH_LOGGING  0x40 /* Exchange/Sequence logging */
#define FC_SCSI_LOGGING  0x80 /* SCSI logging (mostly error handling) */

extern unsigned int fc_debug_logging;

#define FC_CHECK_LOGGING(LEVEL, CMD)				\
do {								\
	if (unlikely(fc_debug_logging & LEVEL))			\
		do {						\
			CMD;					\
		} while (0);					\
} while (0)

#define FC_LIBFC_DBG(fmt, args...)					\
	FC_CHECK_LOGGING(FC_LIBFC_LOGGING,				\
			 printk(KERN_INFO "libfc: " fmt, ##args))

#define FC_LPORT_DBG(lport, fmt, args...)				\
	FC_CHECK_LOGGING(FC_LPORT_LOGGING,				\
			 printk(KERN_INFO "host%u: lport %6x: " fmt,	\
				(lport)->host->host_no,			\
				fc_host_port_id((lport)->host), ##args))

#define FC_DISC_DBG(disc, fmt, args...)					\
	FC_CHECK_LOGGING(FC_DISC_LOGGING,				\
			 printk(KERN_INFO "host%u: disc: " fmt,		\
				(disc)->lport->host->host_no,		\
				##args))

#define FC_RPORT_ID_DBG(lport, port_id, fmt, args...)			\
	FC_CHECK_LOGGING(FC_RPORT_LOGGING,				\
			 printk(KERN_INFO "host%u: rport %6x: " fmt,	\
				(lport)->host->host_no,			\
				(port_id), ##args))

#define FC_RPORT_DBG(rdata, fmt, args...)				\
	FC_RPORT_ID_DBG((rdata)->local_port, (rdata)->ids.port_id, fmt, ##args)

#define FC_FCP_DBG(pkt, fmt, args...)					\
	FC_CHECK_LOGGING(FC_FCP_LOGGING,				\
			 printk(KERN_INFO "host%u: fcp: %6x: " fmt,	\
				(pkt)->lp->host->host_no,		\
				pkt->rport->port_id, ##args))

#define FC_EXCH_DBG(exch, fmt, args...)					\
	FC_CHECK_LOGGING(FC_EXCH_LOGGING,				\
			 printk(KERN_INFO "host%u: xid %4x: " fmt,	\
				(exch)->lp->host->host_no,		\
				exch->xid, ##args))

#define FC_SCSI_DBG(lport, fmt, args...)				\
	FC_CHECK_LOGGING(FC_SCSI_LOGGING,                               \
			 printk(KERN_INFO "host%u: scsi: " fmt,		\
				(lport)->host->host_no,	##args))

/*
 * Set up direct-data placement for this I/O request
 */
void fc_fcp_ddp_setup(struct fc_fcp_pkt *fsp, u16 xid);

/*
 * Module setup functions
 */
int fc_setup_exch_mgr(void);
void fc_destroy_exch_mgr(void);
int fc_setup_rport(void);
void fc_destroy_rport(void);
int fc_setup_fcp(void);
void fc_destroy_fcp(void);

/*
 * Internal libfc functions
 */
const char *fc_els_resp_type(struct fc_frame *);

#endif /* _FC_LIBFC_H_ */