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318 lines
7.1 KiB
318 lines
7.1 KiB
/* |
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* Copyright (c) 2005 Cisco Systems. All rights reserved. |
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* |
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* This software is available to you under a choice of one of two |
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* licenses. You may choose to be licensed under the terms of the GNU |
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* General Public License (GPL) Version 2, available from the file |
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* COPYING in the main directory of this source tree, or the |
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* OpenIB.org BSD license below: |
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* |
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* Redistribution and use in source and binary forms, with or |
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* without modification, are permitted provided that the following |
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* conditions are met: |
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* |
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* - Redistributions of source code must retain the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer. |
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* |
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* - Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer in the documentation and/or other materials |
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* provided with the distribution. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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* SOFTWARE. |
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* |
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* $Id$ |
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*/ |
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#ifndef SCSI_SRP_H |
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#define SCSI_SRP_H |
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/* |
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* Structures and constants for the SCSI RDMA Protocol (SRP) as |
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* defined by the INCITS T10 committee. This file was written using |
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* draft Revision 16a of the SRP standard. |
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*/ |
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#include <linux/types.h> |
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#include <scsi/scsi.h> |
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enum { |
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SRP_LOGIN_REQ = 0x00, |
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SRP_TSK_MGMT = 0x01, |
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SRP_CMD = 0x02, |
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SRP_I_LOGOUT = 0x03, |
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SRP_LOGIN_RSP = 0xc0, |
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SRP_RSP = 0xc1, |
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SRP_LOGIN_REJ = 0xc2, |
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SRP_T_LOGOUT = 0x80, |
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SRP_CRED_REQ = 0x81, |
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SRP_AER_REQ = 0x82, |
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SRP_CRED_RSP = 0x41, |
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SRP_AER_RSP = 0x42 |
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}; |
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enum { |
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SRP_BUF_FORMAT_DIRECT = 1 << 1, |
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SRP_BUF_FORMAT_INDIRECT = 1 << 2 |
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}; |
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enum { |
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SRP_NO_DATA_DESC = 0, |
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SRP_DATA_DESC_DIRECT = 1, |
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SRP_DATA_DESC_INDIRECT = 2, |
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SRP_DATA_DESC_IMM = 3, /* new in SRP2 */ |
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}; |
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enum { |
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SRP_TSK_ABORT_TASK = 0x01, |
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SRP_TSK_ABORT_TASK_SET = 0x02, |
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SRP_TSK_CLEAR_TASK_SET = 0x04, |
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SRP_TSK_LUN_RESET = 0x08, |
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SRP_TSK_CLEAR_ACA = 0x40 |
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}; |
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enum srp_login_rej_reason { |
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SRP_LOGIN_REJ_UNABLE_ESTABLISH_CHANNEL = 0x00010000, |
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SRP_LOGIN_REJ_INSUFFICIENT_RESOURCES = 0x00010001, |
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SRP_LOGIN_REJ_REQ_IT_IU_LENGTH_TOO_LARGE = 0x00010002, |
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SRP_LOGIN_REJ_UNABLE_ASSOCIATE_CHANNEL = 0x00010003, |
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SRP_LOGIN_REJ_UNSUPPORTED_DESCRIPTOR_FMT = 0x00010004, |
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SRP_LOGIN_REJ_MULTI_CHANNEL_UNSUPPORTED = 0x00010005, |
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SRP_LOGIN_REJ_CHANNEL_LIMIT_REACHED = 0x00010006 |
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}; |
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enum { |
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SRP_REV10_IB_IO_CLASS = 0xff00, |
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SRP_REV16A_IB_IO_CLASS = 0x0100 |
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}; |
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struct srp_direct_buf { |
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__be64 va; |
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__be32 key; |
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__be32 len; |
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}; |
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/* |
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* We need the packed attribute because the SRP spec puts the list of |
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* descriptors at an offset of 20, which is not aligned to the size of |
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* struct srp_direct_buf. The whole structure must be packed to avoid |
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* having the 20-byte structure padded to 24 bytes on 64-bit architectures. |
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*/ |
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struct srp_indirect_buf { |
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struct srp_direct_buf table_desc; |
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__be32 len; |
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struct srp_direct_buf desc_list[]; |
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} __attribute__((packed)); |
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/* Immediate data buffer descriptor as defined in SRP2. */ |
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struct srp_imm_buf { |
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__be32 len; |
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}; |
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/* srp_login_req.flags */ |
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enum { |
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SRP_MULTICHAN_SINGLE = 0, |
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SRP_MULTICHAN_MULTI = 1, |
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SRP_IMMED_REQUESTED = 0x80, /* new in SRP2 */ |
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}; |
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struct srp_login_req { |
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u8 opcode; |
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u8 reserved1[7]; |
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u64 tag; |
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__be32 req_it_iu_len; |
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u8 reserved2[4]; |
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__be16 req_buf_fmt; |
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u8 req_flags; |
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u8 reserved3[1]; |
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__be16 imm_data_offset; /* new in SRP2 */ |
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u8 reserved4[2]; |
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u8 initiator_port_id[16]; |
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u8 target_port_id[16]; |
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}; |
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/** |
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* struct srp_login_req_rdma - RDMA/CM login parameters. |
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* |
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* RDMA/CM over InfiniBand can only carry 92 - 36 = 56 bytes of private |
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* data. The %srp_login_req_rdma structure contains the same information as |
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* %srp_login_req but with the reserved data removed. |
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*/ |
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struct srp_login_req_rdma { |
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u64 tag; |
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__be16 req_buf_fmt; |
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u8 req_flags; |
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u8 opcode; |
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__be32 req_it_iu_len; |
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u8 initiator_port_id[16]; |
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u8 target_port_id[16]; |
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__be16 imm_data_offset; |
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u8 reserved[6]; |
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}; |
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/* srp_login_rsp.rsp_flags */ |
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enum { |
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SRP_LOGIN_RSP_MULTICHAN_NO_CHAN = 0x0, |
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SRP_LOGIN_RSP_MULTICHAN_TERMINATED = 0x1, |
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SRP_LOGIN_RSP_MULTICHAN_MAINTAINED = 0x2, |
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SRP_LOGIN_RSP_IMMED_SUPP = 0x80, /* new in SRP2 */ |
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}; |
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/* |
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* The SRP spec defines the size of the LOGIN_RSP structure to be 52 |
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* bytes, so it needs to be packed to avoid having it padded to 56 |
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* bytes on 64-bit architectures. |
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*/ |
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struct srp_login_rsp { |
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u8 opcode; |
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u8 reserved1[3]; |
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__be32 req_lim_delta; |
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u64 tag; |
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__be32 max_it_iu_len; |
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__be32 max_ti_iu_len; |
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__be16 buf_fmt; |
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u8 rsp_flags; |
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u8 reserved2[25]; |
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} __attribute__((packed)); |
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struct srp_login_rej { |
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u8 opcode; |
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u8 reserved1[3]; |
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__be32 reason; |
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u64 tag; |
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u8 reserved2[8]; |
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__be16 buf_fmt; |
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u8 reserved3[6]; |
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}; |
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struct srp_i_logout { |
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u8 opcode; |
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u8 reserved[7]; |
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u64 tag; |
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}; |
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struct srp_t_logout { |
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u8 opcode; |
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u8 sol_not; |
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u8 reserved[2]; |
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__be32 reason; |
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u64 tag; |
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}; |
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/* |
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* We need the packed attribute because the SRP spec only aligns the |
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* 8-byte LUN field to 4 bytes. |
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*/ |
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struct srp_tsk_mgmt { |
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u8 opcode; |
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u8 sol_not; |
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u8 reserved1[6]; |
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u64 tag; |
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u8 reserved2[4]; |
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struct scsi_lun lun; |
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u8 reserved3[2]; |
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u8 tsk_mgmt_func; |
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u8 reserved4; |
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u64 task_tag; |
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u8 reserved5[8]; |
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}; |
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/* |
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* We need the packed attribute because the SRP spec only aligns the |
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* 8-byte LUN field to 4 bytes. |
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*/ |
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struct srp_cmd { |
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u8 opcode; |
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u8 sol_not; |
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u8 reserved1[3]; |
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u8 buf_fmt; |
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u8 data_out_desc_cnt; |
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u8 data_in_desc_cnt; |
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u64 tag; |
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u8 reserved2[4]; |
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struct scsi_lun lun; |
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u8 reserved3; |
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u8 task_attr; |
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u8 reserved4; |
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u8 add_cdb_len; |
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u8 cdb[16]; |
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u8 add_data[]; |
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}; |
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enum { |
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SRP_RSP_FLAG_RSPVALID = 1 << 0, |
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SRP_RSP_FLAG_SNSVALID = 1 << 1, |
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SRP_RSP_FLAG_DOOVER = 1 << 2, |
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SRP_RSP_FLAG_DOUNDER = 1 << 3, |
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SRP_RSP_FLAG_DIOVER = 1 << 4, |
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SRP_RSP_FLAG_DIUNDER = 1 << 5 |
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}; |
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/* |
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* The SRP spec defines the size of the RSP structure to be 36 bytes, |
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* so it needs to be packed to avoid having it padded to 40 bytes on |
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* 64-bit architectures. |
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*/ |
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struct srp_rsp { |
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u8 opcode; |
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u8 sol_not; |
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u8 reserved1[2]; |
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__be32 req_lim_delta; |
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u64 tag; |
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u8 reserved2[2]; |
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u8 flags; |
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u8 status; |
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__be32 data_out_res_cnt; |
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__be32 data_in_res_cnt; |
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__be32 sense_data_len; |
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__be32 resp_data_len; |
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u8 data[]; |
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} __attribute__((packed)); |
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struct srp_cred_req { |
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u8 opcode; |
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u8 sol_not; |
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u8 reserved[2]; |
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__be32 req_lim_delta; |
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u64 tag; |
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}; |
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struct srp_cred_rsp { |
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u8 opcode; |
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u8 reserved[7]; |
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u64 tag; |
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}; |
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/* |
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* The SRP spec defines the fixed portion of the AER_REQ structure to be |
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* 36 bytes, so it needs to be packed to avoid having it padded to 40 bytes |
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* on 64-bit architectures. |
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*/ |
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struct srp_aer_req { |
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u8 opcode; |
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u8 sol_not; |
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u8 reserved[2]; |
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__be32 req_lim_delta; |
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u64 tag; |
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u32 reserved2; |
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struct scsi_lun lun; |
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__be32 sense_data_len; |
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u32 reserved3; |
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u8 sense_data[]; |
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} __attribute__((packed)); |
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struct srp_aer_rsp { |
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u8 opcode; |
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u8 reserved[7]; |
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u64 tag; |
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}; |
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#endif /* SCSI_SRP_H */
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