Staging: strip: delete the driver
[linux/fpc-iii.git] / drivers / scsi / libfc / fc_elsct.c
blob53748724f2c52e55b8aa93ebf8bd9cfc554a7015
1 /*
2 * Copyright(c) 2008 Intel Corporation. All rights reserved.
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.
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.
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.
17 * Maintained at www.Open-FCoE.org
21 * Provide interface to send ELS/CT FC frames
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>
31 /**
32 * fc_elsct_send() - Send an ELS or CT frame
33 * @lport: The local port to send the frame on
34 * @did: The destination ID for the frame
35 * @fp: The frame to be sent
36 * @op: The operational code
37 * @resp: The callback routine when the response is received
38 * @arg: The argument to pass to the response callback routine
39 * @timer_msec: The timeout period for the frame (in msecs)
41 struct fc_seq *fc_elsct_send(struct fc_lport *lport, u32 did,
42 struct fc_frame *fp, unsigned int op,
43 void (*resp)(struct fc_seq *,
44 struct fc_frame *,
45 void *),
46 void *arg, u32 timer_msec)
48 enum fc_rctl r_ctl;
49 enum fc_fh_type fh_type;
50 int rc;
52 /* ELS requests */
53 if ((op >= ELS_LS_RJT) && (op <= ELS_AUTH_ELS))
54 rc = fc_els_fill(lport, did, fp, op, &r_ctl, &fh_type);
55 else {
56 /* CT requests */
57 rc = fc_ct_fill(lport, did, fp, op, &r_ctl, &fh_type);
58 did = FC_FID_DIR_SERV;
61 if (rc) {
62 fc_frame_free(fp);
63 return NULL;
66 fc_fill_fc_hdr(fp, r_ctl, did, fc_host_port_id(lport->host), fh_type,
67 FC_FC_FIRST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0);
69 return lport->tt.exch_seq_send(lport, fp, resp, NULL, arg, timer_msec);
71 EXPORT_SYMBOL(fc_elsct_send);
73 /**
74 * fc_elsct_init() - Initialize the ELS/CT layer
75 * @lport: The local port to initialize the ELS/CT layer for
77 int fc_elsct_init(struct fc_lport *lport)
79 if (!lport->tt.elsct_send)
80 lport->tt.elsct_send = fc_elsct_send;
82 return 0;
84 EXPORT_SYMBOL(fc_elsct_init);
86 /**
87 * fc_els_resp_type() - Return a string describing the ELS response
88 * @fp: The frame pointer or possible error code
90 const char *fc_els_resp_type(struct fc_frame *fp)
92 const char *msg;
93 struct fc_frame_header *fh;
94 struct fc_ct_hdr *ct;
96 if (IS_ERR(fp)) {
97 switch (-PTR_ERR(fp)) {
98 case FC_NO_ERR:
99 msg = "response no error";
100 break;
101 case FC_EX_TIMEOUT:
102 msg = "response timeout";
103 break;
104 case FC_EX_CLOSED:
105 msg = "response closed";
106 break;
107 default:
108 msg = "response unknown error";
109 break;
111 } else {
112 fh = fc_frame_header_get(fp);
113 switch (fh->fh_type) {
114 case FC_TYPE_ELS:
115 switch (fc_frame_payload_op(fp)) {
116 case ELS_LS_ACC:
117 msg = "accept";
118 break;
119 case ELS_LS_RJT:
120 msg = "reject";
121 break;
122 default:
123 msg = "response unknown ELS";
124 break;
126 break;
127 case FC_TYPE_CT:
128 ct = fc_frame_payload_get(fp, sizeof(*ct));
129 if (ct) {
130 switch (ntohs(ct->ct_cmd)) {
131 case FC_FS_ACC:
132 msg = "CT accept";
133 break;
134 case FC_FS_RJT:
135 msg = "CT reject";
136 break;
137 default:
138 msg = "response unknown CT";
139 break;
141 } else {
142 msg = "short CT response";
144 break;
145 default:
146 msg = "response not ELS or CT";
147 break;
150 return msg;