1 /*****************************************************************************/
2 /* srp.h -- SCSI RDMA Protocol definitions */
4 /* Written By: Colin Devilbis, IBM Corporation */
6 /* Copyright (C) 2003 IBM Corporation */
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. */
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. */
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 */
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. */
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 /*****************************************************************************/
38 #define SRP_VERSION "16.a"
39 #define SRP_MAX_IU_LEN 256
42 struct srp_login_req login_req;
43 struct srp_login_rsp login_rsp;
44 struct srp_login_rej login_rej;
45 struct srp_i_logout i_logout;
46 struct srp_t_logout t_logout;
47 struct srp_tsk_mgmt tsk_mgmt;
50 u8 reserved[SRP_MAX_IU_LEN];
53 enum viosrp_crq_formats {
54 VIOSRP_SRP_FORMAT = 0x01,
55 VIOSRP_MAD_FORMAT = 0x02,
56 VIOSRP_OS400_FORMAT = 0x03,
57 VIOSRP_AIX_FORMAT = 0x04,
58 VIOSRP_LINUX_FORMAT = 0x06,
59 VIOSRP_INLINE_FORMAT = 0x07
62 enum viosrp_crq_status {
64 VIOSRP_NONRECOVERABLE_ERR = 0x1,
65 VIOSRP_VIOLATES_MAX_XFER = 0x2,
66 VIOSRP_PARTNER_PANIC = 0x3,
67 VIOSRP_DEVICE_BUSY = 0x8,
68 VIOSRP_ADAPTER_FAIL = 0x10
72 u8 valid; /* used by RPA */
73 u8 format; /* SCSI vs out-of-band */
75 u8 status; /* non-scsi failure? (e.g. DMA failure) */
76 u16 timeout; /* in seconds */
77 u16 IU_length; /* in bytes */
78 u64 IU_data_ptr; /* the TCE for transferring data */
81 /* MADs are Management requests above and beyond the IUs defined in the SRP
84 enum viosrp_mad_types {
85 VIOSRP_EMPTY_IU_TYPE = 0x01,
86 VIOSRP_ERROR_LOG_TYPE = 0x02,
87 VIOSRP_ADAPTER_INFO_TYPE = 0x03,
88 VIOSRP_HOST_CONFIG_TYPE = 0x04
102 * All SRP (and MAD) requests normally flow from the
103 * client to the server. There is no way for the server to send
104 * an asynchronous message back to the client. The Empty IU is used
105 * to hang out a meaningless request to the server so that it can respond
106 * asynchrouously with something like a SCSI AER
108 struct viosrp_empty_iu {
109 struct mad_common common;
114 struct viosrp_error_log {
115 struct mad_common common;
119 struct viosrp_adapter_info {
120 struct mad_common common;
124 struct viosrp_host_config {
125 struct mad_common common;
130 struct viosrp_empty_iu empty_iu;
131 struct viosrp_error_log error_log;
132 struct viosrp_adapter_info adapter_info;
133 struct viosrp_host_config host_config;
141 struct mad_adapter_info_data {
143 char partition_name[96];
144 u32 partition_number;
147 u32 port_max_txu[8]; /* per-port maximum transfer */