1/*
2 * Copyright 2014 Cisco Systems, Inc.  All rights reserved.
3 *
4 * This program is free software; you may redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
9 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
10 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
11 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
12 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
13 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
14 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
15 * SOFTWARE.
16 */
17
18#ifndef __SNIC_DISC_H
19#define __SNIC_DISC_H
20
21#include "snic_fwint.h"
22
23enum snic_disc_state {
24	SNIC_DISC_NONE,
25	SNIC_DISC_INIT,
26	SNIC_DISC_PENDING,
27	SNIC_DISC_DONE
28};
29
30struct snic;
31struct snic_disc {
32	struct list_head tgt_list;
33	enum snic_disc_state state;
34	struct mutex mutex;
35	u16	disc_id;
36	u8	req_cnt;
37	u32	nxt_tgt_id;
38	u32	rtgt_cnt;
39	u8	*rtgt_info;
40	struct delayed_work disc_timeout;
41	void (*cb)(struct snic *);
42};
43
44#define SNIC_TGT_NAM_LEN	16
45
46enum snic_tgt_state {
47	SNIC_TGT_STAT_NONE,
48	SNIC_TGT_STAT_INIT,
49	SNIC_TGT_STAT_ONLINE,	/* Target is Online */
50	SNIC_TGT_STAT_OFFLINE,	/* Target is Offline */
51	SNIC_TGT_STAT_DEL,
52};
53
54struct snic_tgt_priv {
55	struct list_head list;
56	enum snic_tgt_type typ;
57	u16 disc_id;
58	char *name[SNIC_TGT_NAM_LEN];
59
60	union {
61		/*DAS Target specific info */
62		/*SAN Target specific info */
63		u8 dummmy;
64	} u;
65};
66
67/* snic tgt flags */
68#define SNIC_TGT_SCAN_PENDING	0x01
69
70struct snic_tgt {
71	struct list_head list;
72	u16	id;
73	u16	channel;
74	u32	flags;
75	u32	scsi_tgt_id;
76	enum snic_tgt_state state;
77	struct device dev;
78	struct work_struct scan_work;
79	struct work_struct del_work;
80	struct snic_tgt_priv tdata;
81};
82
83
84struct snic_fw_req;
85
86void snic_disc_init(struct snic_disc *);
87int snic_disc_start(struct snic *);
88void snic_disc_term(struct snic *);
89int snic_report_tgt_cmpl_handler(struct snic *, struct snic_fw_req *);
90int snic_tgtinfo_cmpl_handler(struct snic *snic, struct snic_fw_req *fwreq);
91void snic_process_report_tgts_rsp(struct work_struct *);
92void snic_handle_tgt_disc(struct work_struct *);
93void snic_handle_disc(struct work_struct *);
94void snic_tgt_dev_release(struct device *);
95void snic_tgt_del_all(struct snic *);
96
97#define dev_to_tgt(d) \
98	container_of(d, struct snic_tgt, dev)
99
100static inline int
101is_snic_target(struct device *dev)
102{
103	return dev->release == snic_tgt_dev_release;
104}
105
106#define starget_to_tgt(st)	\
107	(is_snic_target(((struct scsi_target *) st)->dev.parent) ? \
108		dev_to_tgt(st->dev.parent) : NULL)
109
110#define snic_tgt_to_shost(t)	\
111	dev_to_shost(t->dev.parent)
112
113static inline int
114snic_tgt_chkready(struct snic_tgt *tgt)
115{
116	if (tgt->state == SNIC_TGT_STAT_ONLINE)
117		return 0;
118	else
119		return DID_NO_CONNECT << 16;
120}
121
122const char *snic_tgt_state_to_str(int);
123int snic_tgt_scsi_abort_io(struct snic_tgt *);
124#endif /* end of  __SNIC_DISC_H */
125