blob: 6a6bba8a2f3472430a0794c3032ca2db96d36f47 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*****************************************************************************/
2/* srp.h -- SCSI RDMA Protocol definitions */
3/* */
4/* Written By: Colin Devilbis, IBM Corporation */
5/* */
6/* Copyright (C) 2003 IBM Corporation */
7/* */
8/* This program is free software; you can redistribute it and/or modify */
9/* it under the terms of the GNU General Public License as published by */
10/* the Free Software Foundation; either version 2 of the License, or */
11/* (at your option) any later version. */
12/* */
13/* This program is distributed in the hope that it will be useful, */
14/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
15/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
16/* GNU General Public License for more details. */
17/* */
18/* You should have received a copy of the GNU General Public License */
19/* along with this program; if not, write to the Free Software */
20/* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
21/* */
22/* */
23/* This file contains structures and definitions for IBM RPA (RS/6000 */
24/* platform architecture) implementation of the SRP (SCSI RDMA Protocol) */
25/* standard. SRP is used on IBM iSeries and pSeries platforms to send SCSI */
26/* commands between logical partitions. */
27/* */
28/* SRP Information Units (IUs) are sent on a "Command/Response Queue" (CRQ) */
29/* between partitions. The definitions in this file are architected, */
30/* and cannot be changed without breaking compatibility with other versions */
31/* of Linux and other operating systems (AIX, OS/400) that talk this protocol*/
32/* between logical partitions */
33/*****************************************************************************/
34#ifndef VIOSRP_H
35#define VIOSRP_H
36#include "srp.h"
37
38enum viosrp_crq_formats {
39 VIOSRP_SRP_FORMAT = 0x01,
40 VIOSRP_MAD_FORMAT = 0x02,
41 VIOSRP_OS400_FORMAT = 0x03,
42 VIOSRP_AIX_FORMAT = 0x04,
43 VIOSRP_LINUX_FORMAT = 0x06,
44 VIOSRP_INLINE_FORMAT = 0x07
45};
46
47struct viosrp_crq {
48 u8 valid; /* used by RPA */
49 u8 format; /* SCSI vs out-of-band */
50 u8 reserved;
51 u8 status; /* non-scsi failure? (e.g. DMA failure) */
52 u16 timeout; /* in seconds */
53 u16 IU_length; /* in bytes */
54 u64 IU_data_ptr; /* the TCE for transferring data */
55};
56
57/* MADs are Management requests above and beyond the IUs defined in the SRP
58 * standard.
59 */
60enum viosrp_mad_types {
61 VIOSRP_EMPTY_IU_TYPE = 0x01,
62 VIOSRP_ERROR_LOG_TYPE = 0x02,
63 VIOSRP_ADAPTER_INFO_TYPE = 0x03,
64 VIOSRP_HOST_CONFIG_TYPE = 0x04
65};
66
67/*
68 * Common MAD header
69 */
70struct mad_common {
71 u32 type;
72 u16 status;
73 u16 length;
74 u64 tag;
75};
76
77/*
78 * All SRP (and MAD) requests normally flow from the
79 * client to the server. There is no way for the server to send
80 * an asynchronous message back to the client. The Empty IU is used
81 * to hang out a meaningless request to the server so that it can respond
82 * asynchrouously with something like a SCSI AER
83 */
84struct viosrp_empty_iu {
85 struct mad_common common;
86 u64 buffer;
87 u32 port;
88};
89
90struct viosrp_error_log {
91 struct mad_common common;
92 u64 buffer;
93};
94
95struct viosrp_adapter_info {
96 struct mad_common common;
97 u64 buffer;
98};
99
100struct viosrp_host_config {
101 struct mad_common common;
102 u64 buffer;
103};
104
105union mad_iu {
106 struct viosrp_empty_iu empty_iu;
107 struct viosrp_error_log error_log;
108 struct viosrp_adapter_info adapter_info;
109 struct viosrp_host_config host_config;
110};
111
112union viosrp_iu {
113 union srp_iu srp;
114 union mad_iu mad;
115};
116
117struct mad_adapter_info_data {
118 char srp_version[8];
119 char partition_name[96];
120 u32 partition_number;
121 u32 mad_version;
122 u32 os_type;
123 u32 port_max_txu[8]; /* per-port maximum transfer */
124};
125
126#endif