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