xref: /linux/drivers/scsi/libfc/fc_libfc.h (revision 75bf465f0bc33e9b776a46d6a1b9b990f5fb7c37)
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright(c) 2009 Intel Corporation. All rights reserved.
4  *
5  * Maintained at www.Open-FCoE.org
6  */
7 
8 #ifndef _FC_LIBFC_H_
9 #define _FC_LIBFC_H_
10 
11 #define FC_LIBFC_LOGGING 0x01 /* General logging, not categorized */
12 #define FC_LPORT_LOGGING 0x02 /* lport layer logging */
13 #define FC_DISC_LOGGING	 0x04 /* discovery layer logging */
14 #define FC_RPORT_LOGGING 0x08 /* rport layer logging */
15 #define FC_FCP_LOGGING	 0x10 /* I/O path logging */
16 #define FC_EM_LOGGING	 0x20 /* Exchange Manager logging */
17 #define FC_EXCH_LOGGING	 0x40 /* Exchange/Sequence logging */
18 #define FC_SCSI_LOGGING	 0x80 /* SCSI logging (mostly error handling) */
19 
20 extern unsigned int fc_debug_logging;
21 
22 #define FC_CHECK_LOGGING(LEVEL, CMD)			\
23 	do {						\
24 		if (unlikely(fc_debug_logging & LEVEL))	\
25 			do {				\
26 				CMD;			\
27 			} while (0);			\
28 	} while (0)
29 
30 #define FC_LIBFC_DBG(fmt, args...)					\
31 	FC_CHECK_LOGGING(FC_LIBFC_LOGGING,				\
32 			 pr_info("libfc: " fmt, ##args))
33 
34 #define FC_LPORT_DBG(lport, fmt, args...)				\
35 	FC_CHECK_LOGGING(FC_LPORT_LOGGING,				\
36 			 pr_info("host%u: lport %6.6x: " fmt,		\
37 				 (lport)->host->host_no,		\
38 				 (lport)->port_id, ##args))
39 
40 #define FC_DISC_DBG(disc, fmt, args...)					\
41 	FC_CHECK_LOGGING(FC_DISC_LOGGING,				\
42 			 pr_info("host%u: disc: " fmt,			\
43 				 fc_disc_lport(disc)->host->host_no,	\
44 				 ##args))
45 
46 #define FC_RPORT_ID_DBG(lport, port_id, fmt, args...)			\
47 	FC_CHECK_LOGGING(FC_RPORT_LOGGING,				\
48 			 pr_info("host%u: rport %6.6x: " fmt,		\
49 				 (lport)->host->host_no,		\
50 				 (port_id), ##args))
51 
52 #define FC_RPORT_DBG(rdata, fmt, args...)				\
53 	FC_RPORT_ID_DBG((rdata)->local_port, (rdata)->ids.port_id, fmt, ##args)
54 
55 #define FC_FCP_DBG(pkt, fmt, args...)					\
56 	FC_CHECK_LOGGING(FC_FCP_LOGGING,				\
57 	{								\
58 		if ((pkt)->seq_ptr) {					\
59 			struct fc_exch *_ep = NULL;			\
60 			_ep = fc_seq_exch((pkt)->seq_ptr);		\
61 			pr_info("host%u: fcp: %6.6x: "			\
62 				"xid %04x-%04x: " fmt,			\
63 				(pkt)->lp->host->host_no,		\
64 				(pkt)->rport->port_id,			\
65 				(_ep)->oxid, (_ep)->rxid, ##args);	\
66 		} else {						\
67 			pr_info("host%u: fcp: %6.6x: " fmt,		\
68 				(pkt)->lp->host->host_no,		\
69 				(pkt)->rport->port_id, ##args);		\
70 		}							\
71 	})
72 
73 #define FC_EXCH_DBG(exch, fmt, args...)					\
74 	FC_CHECK_LOGGING(FC_EXCH_LOGGING,				\
75 			 pr_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 			 pr_info("host%u: scsi: " fmt,			\
82 				 (lport)->host->host_no, ##args))
83 
84 /*
85  * FC-4 Providers.
86  */
87 extern struct fc4_prov *fc_active_prov[];	/* providers without recv */
88 extern struct fc4_prov *fc_passive_prov[];	/* providers with recv */
89 extern struct mutex fc_prov_mutex;		/* lock over table changes */
90 
91 extern struct fc4_prov fc_rport_t0_prov;	/* type 0 provider */
92 extern struct fc4_prov fc_lport_els_prov;	/* ELS provider */
93 extern struct fc4_prov fc_rport_fcp_init;	/* FCP initiator provider */
94 
95 /*
96  * Set up direct-data placement for this I/O request
97  */
98 void fc_fcp_ddp_setup(struct fc_fcp_pkt *fsp, u16 xid);
99 void fc_fcp_ddp_done(struct fc_fcp_pkt *fsp);
100 
101 /*
102  * Module setup functions
103  */
104 int fc_setup_exch_mgr(void);
105 void fc_destroy_exch_mgr(void);
106 int fc_setup_rport(void);
107 void fc_destroy_rport(void);
108 int fc_setup_fcp(void);
109 void fc_destroy_fcp(void);
110 
111 /*
112  * Internal libfc functions
113  */
114 const char *fc_els_resp_type(struct fc_frame *);
115 extern void fc_fc4_add_lport(struct fc_lport *);
116 extern void fc_fc4_del_lport(struct fc_lport *);
117 extern void fc_fc4_conf_lport_params(struct fc_lport *, enum fc_fh_type);
118 
119 /*
120  * Copies a buffer into an sg list
121  */
122 u32 fc_copy_buffer_to_sglist(void *buf, size_t len,
123 			     struct scatterlist *sg,
124 			     u32 *nents, size_t *offset,
125 			     u32 *crc);
126 
127 #endif /* _FC_LIBFC_H_ */
128