339 строки
7.5 KiB
C
339 строки
7.5 KiB
C
/*
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* Copyright (c) 2016 Avago Technologies. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful.
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* ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
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* INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
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* PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE DISCLAIMED, EXCEPT TO
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* THE EXTENT THAT SUCH DISCLAIMERS ARE HELD TO BE LEGALLY INVALID.
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* See the GNU General Public License for more details, a copy of which
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* can be found in the file COPYING included with this package
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*
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*/
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/*
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* This file contains definitions relative to FC-NVME r1.14 (16-020vB).
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* The fcnvme_lsdesc_cr_assoc_cmd struct reflects expected r1.16 content.
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*/
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#ifndef _NVME_FC_H
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#define _NVME_FC_H 1
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#define NVME_CMD_SCSI_ID 0xFD
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#define NVME_CMD_FC_ID FC_TYPE_NVME
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/* FC-NVME Cmd IU Flags */
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#define FCNVME_CMD_FLAGS_DIRMASK 0x03
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#define FCNVME_CMD_FLAGS_WRITE 0x01
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#define FCNVME_CMD_FLAGS_READ 0x02
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struct nvme_fc_cmd_iu {
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__u8 scsi_id;
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__u8 fc_id;
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__be16 iu_len;
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__u8 rsvd4[3];
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__u8 flags;
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__be64 connection_id;
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__be32 csn;
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__be32 data_len;
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struct nvme_command sqe;
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__be32 rsvd88[2];
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};
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#define NVME_FC_SIZEOF_ZEROS_RSP 12
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enum {
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FCNVME_SC_SUCCESS = 0,
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FCNVME_SC_INVALID_FIELD = 1,
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FCNVME_SC_INVALID_CONNID = 2,
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};
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struct nvme_fc_ersp_iu {
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__u8 status_code;
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__u8 rsvd1;
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__be16 iu_len;
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__be32 rsn;
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__be32 xfrd_len;
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__be32 rsvd12;
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struct nvme_completion cqe;
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/* for now - no additional payload */
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};
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/* FC-NVME Link Services */
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enum {
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FCNVME_LS_RSVD = 0,
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FCNVME_LS_RJT = 1,
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FCNVME_LS_ACC = 2,
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FCNVME_LS_CREATE_ASSOCIATION = 3,
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FCNVME_LS_CREATE_CONNECTION = 4,
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FCNVME_LS_DISCONNECT = 5,
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};
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/* FC-NVME Link Service Descriptors */
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enum {
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FCNVME_LSDESC_RSVD = 0x0,
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FCNVME_LSDESC_RQST = 0x1,
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FCNVME_LSDESC_RJT = 0x2,
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FCNVME_LSDESC_CREATE_ASSOC_CMD = 0x3,
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FCNVME_LSDESC_CREATE_CONN_CMD = 0x4,
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FCNVME_LSDESC_DISCONN_CMD = 0x5,
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FCNVME_LSDESC_CONN_ID = 0x6,
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FCNVME_LSDESC_ASSOC_ID = 0x7,
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};
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/* ********** start of Link Service Descriptors ********** */
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/*
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* fills in length of a descriptor. Struture minus descriptor header
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*/
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static inline __be32 fcnvme_lsdesc_len(size_t sz)
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{
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return cpu_to_be32(sz - (2 * sizeof(u32)));
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}
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struct fcnvme_ls_rqst_w0 {
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u8 ls_cmd; /* FCNVME_LS_xxx */
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u8 zeros[3];
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};
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/* FCNVME_LSDESC_RQST */
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struct fcnvme_lsdesc_rqst {
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__be32 desc_tag; /* FCNVME_LSDESC_xxx */
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__be32 desc_len;
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struct fcnvme_ls_rqst_w0 w0;
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__be32 rsvd12;
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};
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/* FC-NVME LS RJT reason_code values */
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enum fcnvme_ls_rjt_reason {
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FCNVME_RJT_RC_NONE = 0,
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/* no reason - not to be sent */
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FCNVME_RJT_RC_INVAL = 0x01,
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/* invalid NVMe_LS command code */
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FCNVME_RJT_RC_LOGIC = 0x03,
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/* logical error */
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FCNVME_RJT_RC_UNAB = 0x09,
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/* unable to perform command request */
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FCNVME_RJT_RC_UNSUP = 0x0b,
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/* command not supported */
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FCNVME_RJT_RC_INPROG = 0x0e,
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/* command already in progress */
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FCNVME_RJT_RC_INV_ASSOC = 0x40,
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/* Invalid Association ID*/
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FCNVME_RJT_RC_INV_CONN = 0x41,
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/* Invalid Connection ID*/
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FCNVME_RJT_RC_VENDOR = 0xff,
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/* vendor specific error */
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};
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/* FC-NVME LS RJT reason_explanation values */
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enum fcnvme_ls_rjt_explan {
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FCNVME_RJT_EXP_NONE = 0x00,
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/* No additional explanation */
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FCNVME_RJT_EXP_OXID_RXID = 0x17,
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/* invalid OX_ID-RX_ID combination */
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FCNVME_RJT_EXP_INSUF_RES = 0x29,
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/* insufficient resources */
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FCNVME_RJT_EXP_UNAB_DATA = 0x2a,
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/* unable to supply requested data */
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FCNVME_RJT_EXP_INV_LEN = 0x2d,
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/* Invalid payload length */
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};
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/* FCNVME_LSDESC_RJT */
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struct fcnvme_lsdesc_rjt {
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__be32 desc_tag; /* FCNVME_LSDESC_xxx */
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__be32 desc_len;
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u8 rsvd8;
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/*
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* Reject reason and explanaction codes are generic
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* to ELs's from LS-3.
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*/
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u8 reason_code; /* fcnvme_ls_rjt_reason */
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u8 reason_explanation; /* fcnvme_ls_rjt_explan */
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u8 vendor;
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__be32 rsvd12;
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};
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#define FCNVME_ASSOC_HOSTNQN_LEN 256
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#define FCNVME_ASSOC_SUBNQN_LEN 256
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/* FCNVME_LSDESC_CREATE_ASSOC_CMD */
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struct fcnvme_lsdesc_cr_assoc_cmd {
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__be32 desc_tag; /* FCNVME_LSDESC_xxx */
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__be32 desc_len;
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__be16 ersp_ratio;
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__be16 rsvd10;
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__be32 rsvd12[9];
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__be16 cntlid;
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__be16 sqsize;
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__be32 rsvd52;
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uuid_t hostid;
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u8 hostnqn[FCNVME_ASSOC_HOSTNQN_LEN];
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u8 subnqn[FCNVME_ASSOC_SUBNQN_LEN];
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__be32 rsvd584[108]; /* pad to 1016 bytes,
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* which makes overall LS rqst
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* payload 1024 bytes
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*/
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};
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#define FCNVME_LSDESC_CRA_CMD_DESC_MINLEN \
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offsetof(struct fcnvme_lsdesc_cr_assoc_cmd, rsvd584)
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#define FCNVME_LSDESC_CRA_CMD_DESC_MIN_DESCLEN \
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(FCNVME_LSDESC_CRA_CMD_DESC_MINLEN - \
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offsetof(struct fcnvme_lsdesc_cr_assoc_cmd, ersp_ratio))
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/* FCNVME_LSDESC_CREATE_CONN_CMD */
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struct fcnvme_lsdesc_cr_conn_cmd {
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__be32 desc_tag; /* FCNVME_LSDESC_xxx */
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__be32 desc_len;
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__be16 ersp_ratio;
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__be16 rsvd10;
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__be32 rsvd12[9];
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__be16 qid;
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__be16 sqsize;
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__be32 rsvd52;
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};
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/* Disconnect Scope Values */
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enum {
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FCNVME_DISCONN_ASSOCIATION = 0,
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FCNVME_DISCONN_CONNECTION = 1,
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};
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/* FCNVME_LSDESC_DISCONN_CMD */
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struct fcnvme_lsdesc_disconn_cmd {
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__be32 desc_tag; /* FCNVME_LSDESC_xxx */
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__be32 desc_len;
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u8 rsvd8[3];
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/* note: scope is really a 1 bit field */
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u8 scope; /* FCNVME_DISCONN_xxx */
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__be32 rsvd12;
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__be64 id;
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};
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/* FCNVME_LSDESC_CONN_ID */
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struct fcnvme_lsdesc_conn_id {
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__be32 desc_tag; /* FCNVME_LSDESC_xxx */
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__be32 desc_len;
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__be64 connection_id;
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};
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/* FCNVME_LSDESC_ASSOC_ID */
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struct fcnvme_lsdesc_assoc_id {
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__be32 desc_tag; /* FCNVME_LSDESC_xxx */
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__be32 desc_len;
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__be64 association_id;
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};
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/* r_ctl values */
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enum {
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FCNVME_RS_RCTL_DATA = 1,
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FCNVME_RS_RCTL_XFER_RDY = 5,
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FCNVME_RS_RCTL_RSP = 8,
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};
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/* ********** start of Link Services ********** */
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/* FCNVME_LS_RJT */
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struct fcnvme_ls_rjt {
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struct fcnvme_ls_rqst_w0 w0;
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__be32 desc_list_len;
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struct fcnvme_lsdesc_rqst rqst;
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struct fcnvme_lsdesc_rjt rjt;
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};
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/* FCNVME_LS_ACC */
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struct fcnvme_ls_acc_hdr {
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struct fcnvme_ls_rqst_w0 w0;
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__be32 desc_list_len;
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struct fcnvme_lsdesc_rqst rqst;
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/* Followed by cmd-specific ACC descriptors, see next definitions */
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};
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/* FCNVME_LS_CREATE_ASSOCIATION */
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struct fcnvme_ls_cr_assoc_rqst {
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struct fcnvme_ls_rqst_w0 w0;
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__be32 desc_list_len;
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struct fcnvme_lsdesc_cr_assoc_cmd assoc_cmd;
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};
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#define FCNVME_LSDESC_CRA_RQST_MINLEN \
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(offsetof(struct fcnvme_ls_cr_assoc_rqst, assoc_cmd) + \
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FCNVME_LSDESC_CRA_CMD_DESC_MINLEN)
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#define FCNVME_LSDESC_CRA_RQST_MIN_LISTLEN \
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FCNVME_LSDESC_CRA_CMD_DESC_MINLEN
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struct fcnvme_ls_cr_assoc_acc {
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struct fcnvme_ls_acc_hdr hdr;
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struct fcnvme_lsdesc_assoc_id associd;
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struct fcnvme_lsdesc_conn_id connectid;
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};
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/* FCNVME_LS_CREATE_CONNECTION */
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struct fcnvme_ls_cr_conn_rqst {
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struct fcnvme_ls_rqst_w0 w0;
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__be32 desc_list_len;
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struct fcnvme_lsdesc_assoc_id associd;
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struct fcnvme_lsdesc_cr_conn_cmd connect_cmd;
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};
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struct fcnvme_ls_cr_conn_acc {
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struct fcnvme_ls_acc_hdr hdr;
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struct fcnvme_lsdesc_conn_id connectid;
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};
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/* FCNVME_LS_DISCONNECT */
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struct fcnvme_ls_disconnect_rqst {
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struct fcnvme_ls_rqst_w0 w0;
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__be32 desc_list_len;
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struct fcnvme_lsdesc_assoc_id associd;
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struct fcnvme_lsdesc_disconn_cmd discon_cmd;
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};
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struct fcnvme_ls_disconnect_acc {
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struct fcnvme_ls_acc_hdr hdr;
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};
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/*
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* Yet to be defined in FC-NVME:
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*/
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#define NVME_FC_CONNECT_TIMEOUT_SEC 2 /* 2 seconds */
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#define NVME_FC_LS_TIMEOUT_SEC 2 /* 2 seconds */
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#define NVME_FC_TGTOP_TIMEOUT_SEC 2 /* 2 seconds */
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#endif /* _NVME_FC_H */
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