1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright(c) 2008 Intel Corporation. All rights reserved.
5 * Maintained at www.Open-FCoE.org
9 * Provide interface to send ELS/CT FC frames
12 #include <linux/export.h>
13 #include <asm/unaligned.h>
14 #include <scsi/fc/fc_gs.h>
15 #include <scsi/fc/fc_ns.h>
16 #include <scsi/fc/fc_els.h>
17 #include <scsi/libfc.h>
18 #include <scsi/fc_encode.h>
22 * fc_elsct_send() - Send an ELS or CT frame
23 * @lport: The local port to send the frame on
24 * @did: The destination ID for the frame
25 * @fp: The frame to be sent
26 * @op: The operational code
27 * @resp: The callback routine when the response is received
28 * @arg: The argument to pass to the response callback routine
29 * @timer_msec: The timeout period for the frame (in msecs)
31 struct fc_seq *fc_elsct_send(struct fc_lport *lport, u32 did,
32 struct fc_frame *fp, unsigned int op,
33 void (*resp)(struct fc_seq *,
36 void *arg, u32 timer_msec)
39 enum fc_fh_type fh_type;
43 if ((op >= ELS_LS_RJT) && (op <= ELS_AUTH_ELS))
44 rc = fc_els_fill(lport, did, fp, op, &r_ctl, &fh_type);
47 rc = fc_ct_fill(lport, did, fp, op, &r_ctl, &fh_type, &did);
55 fc_fill_fc_hdr(fp, r_ctl, did, lport->port_id, fh_type,
58 return fc_exch_seq_send(lport, fp, resp, NULL, arg, timer_msec);
60 EXPORT_SYMBOL(fc_elsct_send);
63 * fc_elsct_init() - Initialize the ELS/CT layer
64 * @lport: The local port to initialize the ELS/CT layer for
66 int fc_elsct_init(struct fc_lport *lport)
68 if (!lport->tt.elsct_send)
69 lport->tt.elsct_send = fc_elsct_send;
73 EXPORT_SYMBOL(fc_elsct_init);
76 * fc_els_resp_type() - Return a string describing the ELS response
77 * @fp: The frame pointer or possible error code
79 const char *fc_els_resp_type(struct fc_frame *fp)
82 struct fc_frame_header *fh;
86 switch (-PTR_ERR(fp)) {
88 msg = "response no error";
91 msg = "response timeout";
94 msg = "response closed";
97 msg = "response unknown error";
101 fh = fc_frame_header_get(fp);
102 switch (fh->fh_type) {
104 switch (fc_frame_payload_op(fp)) {
112 msg = "response unknown ELS";
117 ct = fc_frame_payload_get(fp, sizeof(*ct));
119 switch (ntohs(ct->ct_cmd)) {
127 msg = "response unknown CT";
131 msg = "short CT response";
135 msg = "response not ELS or CT";