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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
- };
- 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));
- enum {
- SRP_MULTICHAN_SINGLE = 0,
- SRP_MULTICHAN_MULTI = 1
- };
- 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[5];
- u8 initiator_port_id[16];
- u8 target_port_id[16];
- };
- /*
- * 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 */
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