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42e9a92f RL |
1 | /* |
2 | * Copyright(c) 2008 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 | /* | |
21 | * Provide interface to send ELS/CT FC frames | |
22 | */ | |
23 | ||
24 | #include <asm/unaligned.h> | |
25 | #include <scsi/fc/fc_gs.h> | |
26 | #include <scsi/fc/fc_ns.h> | |
27 | #include <scsi/fc/fc_els.h> | |
28 | #include <scsi/libfc.h> | |
29 | #include <scsi/fc_encode.h> | |
30 | ||
31 | /* | |
32 | * fc_elsct_send - sends ELS/CT frame | |
33 | */ | |
34 | static struct fc_seq *fc_elsct_send(struct fc_lport *lport, | |
a46f327a | 35 | u32 did, |
42e9a92f RL |
36 | struct fc_frame *fp, |
37 | unsigned int op, | |
38 | void (*resp)(struct fc_seq *, | |
39 | struct fc_frame *fp, | |
40 | void *arg), | |
41 | void *arg, u32 timer_msec) | |
42 | { | |
43 | enum fc_rctl r_ctl; | |
42e9a92f RL |
44 | enum fc_fh_type fh_type; |
45 | int rc; | |
46 | ||
47 | /* ELS requests */ | |
48 | if ((op >= ELS_LS_RJT) && (op <= ELS_AUTH_ELS)) | |
a46f327a JE |
49 | rc = fc_els_fill(lport, did, fp, op, &r_ctl, &fh_type); |
50 | else { | |
42e9a92f | 51 | /* CT requests */ |
2ab7e1ec | 52 | rc = fc_ct_fill(lport, did, fp, op, &r_ctl, &fh_type); |
a46f327a JE |
53 | did = FC_FID_DIR_SERV; |
54 | } | |
42e9a92f RL |
55 | |
56 | if (rc) | |
57 | return NULL; | |
58 | ||
59 | fc_fill_fc_hdr(fp, r_ctl, did, fc_host_port_id(lport->host), fh_type, | |
60 | FC_FC_FIRST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0); | |
61 | ||
62 | return lport->tt.exch_seq_send(lport, fp, resp, NULL, arg, timer_msec); | |
63 | } | |
64 | ||
65 | int fc_elsct_init(struct fc_lport *lport) | |
66 | { | |
67 | if (!lport->tt.elsct_send) | |
68 | lport->tt.elsct_send = fc_elsct_send; | |
69 | ||
70 | return 0; | |
71 | } | |
72 | EXPORT_SYMBOL(fc_elsct_init); | |
f657d299 JE |
73 | |
74 | /** | |
75 | * fc_els_resp_type() - return string describing ELS response for debug. | |
76 | * @fp: frame pointer with possible error code. | |
77 | */ | |
78 | const char *fc_els_resp_type(struct fc_frame *fp) | |
79 | { | |
80 | const char *msg; | |
81 | if (IS_ERR(fp)) { | |
82 | switch (-PTR_ERR(fp)) { | |
83 | case FC_NO_ERR: | |
84 | msg = "response no error"; | |
85 | break; | |
86 | case FC_EX_TIMEOUT: | |
87 | msg = "response timeout"; | |
88 | break; | |
89 | case FC_EX_CLOSED: | |
90 | msg = "response closed"; | |
91 | break; | |
92 | default: | |
93 | msg = "response unknown error"; | |
94 | break; | |
95 | } | |
96 | } else { | |
97 | switch (fc_frame_payload_op(fp)) { | |
98 | case ELS_LS_ACC: | |
99 | msg = "accept"; | |
100 | break; | |
101 | case ELS_LS_RJT: | |
102 | msg = "reject"; | |
103 | break; | |
104 | default: | |
105 | msg = "response unknown ELS"; | |
106 | break; | |
107 | } | |
108 | } | |
109 | return msg; | |
110 | } |