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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
20extern 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 */
87extern struct fc4_prov *fc_active_prov[]; /* providers without recv */
88extern struct fc4_prov *fc_passive_prov[]; /* providers with recv */
89extern struct mutex fc_prov_mutex; /* lock over table changes */
90
91extern struct fc4_prov fc_rport_t0_prov; /* type 0 provider */
92extern struct fc4_prov fc_lport_els_prov; /* ELS provider */
93extern struct fc4_prov fc_rport_fcp_init; /* FCP initiator provider */
94
95/*
96 * Set up direct-data placement for this I/O request
97 */
98void fc_fcp_ddp_setup(struct fc_fcp_pkt *fsp, u16 xid);
99void fc_fcp_ddp_done(struct fc_fcp_pkt *fsp);
100
101/*
102 * Module setup functions
103 */
104int fc_setup_exch_mgr(void);
105void fc_destroy_exch_mgr(void);
106int fc_setup_rport(void);
107void fc_destroy_rport(void);
108int fc_setup_fcp(void);
109void fc_destroy_fcp(void);
110
111/*
112 * Internal libfc functions
113 */
114const char *fc_els_resp_type(struct fc_frame *);
115extern void fc_fc4_add_lport(struct fc_lport *);
116extern void fc_fc4_del_lport(struct fc_lport *);
117extern void fc_fc4_conf_lport_params(struct fc_lport *, enum fc_fh_type);
118
119/*
120 * Copies a buffer into an sg list
121 */
122u32 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_ */