include/scsi/iser.h

0001 /*
0002  * Copyright (c) 2015 Mellanox Technologies. All rights reserved.
0003  *
0004  * This software is available to you under a choice of one of two
0005  * licenses.  You may choose to be licensed under the terms of the GNU
0006  * General Public License (GPL) Version 2, available from the file
0007  * COPYING in the main directory of this source tree, or the
0008  * OpenIB.org BSD license below:
0009  *
0010  *     Redistribution and use in source and binary forms, with or
0011  *     without modification, are permitted provided that the following
0012  *     conditions are met:
0013  *
0014  *  - Redistributions of source code must retain the above
0015  *    copyright notice, this list of conditions and the following
0016  *    disclaimer.
0017  *
0018  *  - Redistributions in binary form must reproduce the above
0019  *    copyright notice, this list of conditions and the following
0020  *    disclaimer in the documentation and/or other materials
0021  *    provided with the distribution.
0022  *
0023  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
0024  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
0025  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
0026  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
0027  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
0028  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
0029  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
0030  * SOFTWARE.
0031  */
0032 #ifndef ISCSI_ISER_H
0033 #define ISCSI_ISER_H
0034
0035 #define ISER_ZBVA_NOT_SUP       0x80
0036 #define ISER_SEND_W_INV_NOT_SUP     0x40
0037 #define ISERT_ZBVA_NOT_USED     0x80
0038 #define ISERT_SEND_W_INV_NOT_USED   0x40
0039
0040 #define ISCSI_CTRL  0x10
0041 #define ISER_HELLO  0x20
0042 #define ISER_HELLORPLY  0x30
0043
0044 #define ISER_VER    0x10
0045 #define ISER_WSV    0x08
0046 #define ISER_RSV    0x04
0047
0048 /**
0049  * struct iser_cm_hdr - iSER CM header (from iSER Annex A12)
0050  *
0051  * @flags:        flags support (zbva, send_w_inv)
0052  * @rsvd:         reserved
0053  */
0054 struct iser_cm_hdr {
0055     u8      flags;
0056     u8      rsvd[3];
0057 } __packed;
0058
0059 /**
0060  * struct iser_ctrl - iSER header of iSCSI control PDU
0061  *
0062  * @flags:        opcode and read/write valid bits
0063  * @rsvd:         reserved
0064  * @write_stag:   write rkey
0065  * @write_va:     write virtual address
0066  * @reaf_stag:    read rkey
0067  * @read_va:      read virtual address
0068  */
0069 struct iser_ctrl {
0070     u8      flags;
0071     u8      rsvd[3];
0072     __be32  write_stag;
0073     __be64  write_va;
0074     __be32  read_stag;
0075     __be64  read_va;
0076 } __packed;
0077
0078 #endif /* ISCSI_ISER_H */