drivers/scsi/libfc/fc_libfc.h

   1 /*
   2  * Copyright(c) 2009 Intel Corporation. All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms and conditions of the GNU General Public License,
   6  * version 2, as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11  * more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along with
  14  * this program; if not, write to the Free Software Foundation, Inc.,
  15  * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  16  *
  17  * Maintained at www.Open-FCoE.org
  18  */
  19
  20 #ifndef _FC_LIBFC_H_
  21 #define _FC_LIBFC_H_
  22
  23 #define FC_LIBFC_LOGGING 0x01 /* General logging, not categorized */
  24 #define FC_LPORT_LOGGING 0x02 /* lport layer logging */
  25 #define FC_DISC_LOGGING  0x04 /* discovery layer logging */
  26 #define FC_RPORT_LOGGING 0x08 /* rport layer logging */
  27 #define FC_FCP_LOGGING   0x10 /* I/O path logging */
  28 #define FC_EM_LOGGING    0x20 /* Exchange Manager logging */
  29 #define FC_EXCH_LOGGING  0x40 /* Exchange/Sequence logging */
  30 #define FC_SCSI_LOGGING  0x80 /* SCSI logging (mostly error handling) */
  31
  32 extern unsigned int fc_debug_logging;
  33
  34 #define FC_CHECK_LOGGING(LEVEL, CMD)                    \
  35         do {                                            \
  36                 if (unlikely(fc_debug_logging & LEVEL)) \
  37                         do {                            \
  38                                 CMD;                    \
  39                         } while (0);                    \
  40         } while (0)
  41
  42 #define FC_LIBFC_DBG(fmt, args...)                                      \
  43         FC_CHECK_LOGGING(FC_LIBFC_LOGGING,                              \
  44                          printk(KERN_INFO "libfc: " fmt, ##args))
  45
  46 #define FC_LPORT_DBG(lport, fmt, args...)                               \
  47         FC_CHECK_LOGGING(FC_LPORT_LOGGING,                              \
  48                          printk(KERN_INFO "host%u: lport %6.6x: " fmt,  \
  49                                 (lport)->host->host_no,                 \
  50                                 (lport)->port_id, ##args))
  51
  52 #define FC_DISC_DBG(disc, fmt, args...)                         \
  53         FC_CHECK_LOGGING(FC_DISC_LOGGING,                       \
  54                          printk(KERN_INFO "host%u: disc: " fmt, \
  55                                 fc_disc_lport(disc)->host->host_no,     \
  56                                 ##args))
  57
  58 #define FC_RPORT_ID_DBG(lport, port_id, fmt, args...)                   \
  59         FC_CHECK_LOGGING(FC_RPORT_LOGGING,                              \
  60                          printk(KERN_INFO "host%u: rport %6.6x: " fmt,  \
  61                                 (lport)->host->host_no,                 \
  62                                 (port_id), ##args))
  63
  64 #define FC_RPORT_DBG(rdata, fmt, args...)                               \
  65         FC_RPORT_ID_DBG((rdata)->local_port, (rdata)->ids.port_id, fmt, ##args)
  66
  67 #define FC_FCP_DBG(pkt, fmt, args...)                                   \
  68         FC_CHECK_LOGGING(FC_FCP_LOGGING,                                \
  69                          printk(KERN_INFO "host%u: fcp: %6.6x: " fmt,   \
  70                                 (pkt)->lp->host->host_no,               \
  71                                 pkt->rport->port_id, ##args))
  72
  73 #define FC_EXCH_DBG(exch, fmt, args...)                                 \
  74         FC_CHECK_LOGGING(FC_EXCH_LOGGING,                               \
  75                          printk(KERN_INFO "host%u: xid %4x: " fmt,      \
  76                                 (exch)->lp->host->host_no,              \
  77                                 exch->xid, ##args))
  78
  79 #define FC_SCSI_DBG(lport, fmt, args...)                                \
  80         FC_CHECK_LOGGING(FC_SCSI_LOGGING,                               \
  81                          printk(KERN_INFO "host%u: scsi: " fmt,         \
  82                                 (lport)->host->host_no, ##args))
  83
  84 /*
  85  * Set up direct-data placement for this I/O request
  86  */
  87 void fc_fcp_ddp_setup(struct fc_fcp_pkt *fsp, u16 xid);
  88
  89 /*
  90  * Module setup functions
  91  */
  92 int fc_setup_exch_mgr(void);
  93 void fc_destroy_exch_mgr(void);
  94 int fc_setup_rport(void);
  95 void fc_destroy_rport(void);
  96 int fc_setup_fcp(void);
  97 void fc_destroy_fcp(void);
  98
  99 /*
 100  * Internal libfc functions
 101  */
 102 const char *fc_els_resp_type(struct fc_frame *);
 103
 104 /*
 105  * Copies a buffer into an sg list
 106  */
 107 u32 fc_copy_buffer_to_sglist(void *buf, size_t len,
 108                              struct scatterlist *sg,
 109                              u32 *nents, size_t *offset,
 110                              enum km_type km_type, u32 *crc);
 111
 112 #endif /* _FC_LIBFC_H_ */