IB: Add SCSI RDMA Protocol (SRP) initiator
Add an InfiniBand SCSI RDMA Protocol (SRP) initiator. This driver is
used to talk talk to InfiniBand SRP targets (storage devices).
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/include/scsi/srp.h b/include/scsi/srp.h
new file mode 100644
index 0000000..6c2681d
--- /dev/null
+++ b/include/scsi/srp.h
@@ -0,0 +1,226 @@
+/*
+ * 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>
+
+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
+};
+
+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.
+ */
+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];
+};
+
+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];
+};
+
+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];
+ __be64 lun __attribute__((packed));
+ 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];
+ __be64 lun __attribute__((packed));
+ 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
+};
+
+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];
+};
+
+#endif /* SCSI_SRP_H */