| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /*****************************************************************************/ |
| 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 | |
| 38 | enum 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 | |
| 47 | struct 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 | */ |
| 60 | enum 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 | */ |
| 70 | struct 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 | */ |
| 84 | struct viosrp_empty_iu { |
| 85 | struct mad_common common; |
| 86 | u64 buffer; |
| 87 | u32 port; |
| 88 | }; |
| 89 | |
| 90 | struct viosrp_error_log { |
| 91 | struct mad_common common; |
| 92 | u64 buffer; |
| 93 | }; |
| 94 | |
| 95 | struct viosrp_adapter_info { |
| 96 | struct mad_common common; |
| 97 | u64 buffer; |
| 98 | }; |
| 99 | |
| 100 | struct viosrp_host_config { |
| 101 | struct mad_common common; |
| 102 | u64 buffer; |
| 103 | }; |
| 104 | |
| 105 | union 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 | |
| 112 | union viosrp_iu { |
| 113 | union srp_iu srp; |
| 114 | union mad_iu mad; |
| 115 | }; |
| 116 | |
| 117 | struct 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 |