1 /*
2  * Copyright (c) 2015 Mellanox Technologies. All rights reserved.
3  *
4  * This software is available to you under a choice of one of two
5  * licenses.  You may choose to be licensed under the terms of the GNU
6  * General Public License (GPL) Version 2, available from the file
7  * COPYING in the main directory of this source tree, or the
8  * OpenIB.org BSD license below:
9  *
10  *     Redistribution and use in source and binary forms, with or
11  *     without modification, are permitted provided that the following
12  *     conditions are met:
13  *
14  *	- Redistributions of source code must retain the above
15  *	  copyright notice, this list of conditions and the following
16  *	  disclaimer.
17  *
18  *	- Redistributions in binary form must reproduce the above
19  *	  copyright notice, this list of conditions and the following
20  *	  disclaimer in the documentation and/or other materials
21  *	  provided with the distribution.
22  *
23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30  * SOFTWARE.
31  */
32 #ifndef ISCSI_ISER_H
33 #define ISCSI_ISER_H
34 
35 #define ISER_ZBVA_NOT_SUP		0x80
36 #define ISER_SEND_W_INV_NOT_SUP		0x40
37 #define ISERT_ZBVA_NOT_USED		0x80
38 #define ISERT_SEND_W_INV_NOT_USED	0x40
39 
40 #define ISCSI_CTRL	0x10
41 #define ISER_HELLO	0x20
42 #define ISER_HELLORPLY	0x30
43 
44 #define ISER_VER	0x10
45 #define ISER_WSV	0x08
46 #define ISER_RSV	0x04
47 
48 /**
49  * struct iser_cm_hdr - iSER CM header (from iSER Annex A12)
50  *
51  * @flags:        flags support (zbva, send_w_inv)
52  * @rsvd:         reserved
53  */
54 struct iser_cm_hdr {
55 	u8      flags;
56 	u8      rsvd[3];
57 } __packed;
58 
59 /**
60  * struct iser_ctrl - iSER header of iSCSI control PDU
61  *
62  * @flags:        opcode and read/write valid bits
63  * @rsvd:         reserved
64  * @write_stag:   write rkey
65  * @write_va:     write virtual address
66  * @reaf_stag:    read rkey
67  * @read_va:      read virtual address
68  */
69 struct iser_ctrl {
70 	u8      flags;
71 	u8      rsvd[3];
72 	__be32  write_stag;
73 	__be64  write_va;
74 	__be32  read_stag;
75 	__be64  read_va;
76 } __packed;
77 
78 #endif /* ISCSI_ISER_H */
79