/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2016 Avago Technologies. All rights reserved.
*/
/*
* This file contains definitions relative to FC-NVME r1.14 (16-020vB).
* The fcnvme_lsdesc_cr_assoc_cmd struct reflects expected r1.16 content.
*/
#ifndef _NVME_FC_H
#define _NVME_FC_H 1
#define NVME_CMD_SCSI_ID 0xFD
#define NVME_CMD_FC_ID FC_TYPE_NVME
/* FC-NVME Cmd IU Flags */
#define FCNVME_CMD_FLAGS_DIRMASK 0x03
#define FCNVME_CMD_FLAGS_WRITE 0x01
#define FCNVME_CMD_FLAGS_READ 0x02
struct nvme_fc_cmd_iu {
__u8 scsi_id;
__u8 fc_id;
__be16 iu_len;
__u8 rsvd4[3];
__u8 flags;
__be64 connection_id;
__be32 csn;
__be32 data_len;
struct nvme_command sqe;
__be32 rsvd88[2];
};
#define NVME_FC_SIZEOF_ZEROS_RSP 12
enum {
FCNVME_SC_SUCCESS = 0,
FCNVME_SC_INVALID_FIELD = 1,
FCNVME_SC_INVALID_CONNID = 2,
};
struct nvme_fc_ersp_iu {
__u8 status_code;
__u8 rsvd1;
__be16 iu_len;
__be32 rsn;
__be32 xfrd_len;
__be32 rsvd12;
struct nvme_completion cqe;
/* for now - no additional payload */
};
/* FC-NVME Link Services */
enum {
FCNVME_LS_RSVD = 0,
FCNVME_LS_RJT = 1,
FCNVME_LS_ACC = 2,
FCNVME_LS_CREATE_ASSOCIATION = 3,
FCNVME_LS_CREATE_CONNECTION = 4,
FCNVME_LS_DISCONNECT = 5,
};
/* FC-NVME Link Service Descriptors */
enum {
FCNVME_LSDESC_RSVD = 0x0,
FCNVME_LSDESC_RQST = 0x1,
FCNVME_LSDESC_RJT = 0x2,
FCNVME_LSDESC_CREATE_ASSOC_CMD = 0x3,
FCNVME_LSDESC_CREATE_CONN_CMD = 0x4,
FCNVME_LSDESC_DISCONN_CMD = 0x5,
FCNVME_LSDESC_CONN_ID = 0x6,
FCNVME_LSDESC_ASSOC_ID = 0x7,
};
/* ********** start of Link Service Descriptors ********** */
/*
* fills in length of a descriptor. Struture minus descriptor header
*/
static inline __be32 fcnvme_lsdesc_len(size_t sz)
{
return cpu_to_be32(sz - (2 * sizeof(u32)));
}
struct fcnvme_ls_rqst_w0 {
u8 ls_cmd; /* FCNVME_LS_xxx */
u8 zeros[3];
};
/* FCNVME_LSDESC_RQST */
struct fcnvme_lsdesc_rqst {
__be32 desc_tag; /* FCNVME_LSDESC_xxx */
__be32 desc_len;
struct fcnvme_ls_rqst_w0 w0;
__be32 rsvd12;
};
/* FC-NVME LS RJT reason_code values */
enum fcnvme_ls_rjt_reason {
FCNVME_RJT_RC_NONE = 0,
/* no reason - not to be sent */
FCNVME_RJT_RC_INVAL = 0x01,
/* invalid NVMe_LS command code */
FCNVME_RJT_RC_LOGIC = 0x03,
/* logical error */
FCNVME_RJT_RC_UNAB = 0x09,
/* unable to perform command request */
FCNVME_RJT_RC_UNSUP = 0x0b,
/* command not supported */
FCNVME_RJT_RC_INPROG = 0x0e,
/* command already in progress */
FCNVME_RJT_RC_INV_ASSOC = 0x40,
/* Invalid Association ID*/
FCNVME_RJT_RC_INV_CONN = 0x41,
/* Invalid Connection ID*/
FCNVME_RJT_RC_VENDOR = 0xff,
/* vendor specific error */
};
/* FC-NVME LS RJT reason_explanation values */
enum fcnvme_ls_rjt_explan {
FCNVME_RJT_EXP_NONE = 0x00,
/* No additional explanation */
FCNVME_RJT_EXP_OXID_RXID = 0x17,
/* invalid OX_ID-RX_ID combination */
FCNVME_RJT_EXP_INSUF_RES = 0x29,
/* insufficient resources */
FCNVME_RJT_EXP_UNAB_DATA = 0x2a,
/* unable to supply requested data */
FCNVME_RJT_EXP_INV_LEN = 0x2d,
/* Invalid payload length */
};
/* FCNVME_LSDESC_RJT */
struct fcnvme_lsdesc_rjt {
__be32 desc_tag; /* FCNVME_LSDESC_xxx */
__be32 desc_len;
u8 rsvd8;
/*
* Reject reason and explanaction codes are generic
* to ELs's from LS-3.
*/
u8 reason_code; /* fcnvme_ls_rjt_reason */
u8 reason_explanation; /* fcnvme_ls_rjt_explan */
u8 vendor;
__be32 rsvd12;
};
#define FCNVME_ASSOC_HOSTNQN_LEN 256
#define FCNVME_ASSOC_SUBNQN_LEN 256
/* FCNVME_LSDESC_CREATE_ASSOC_CMD */
struct fcnvme_lsdesc_cr_assoc_cmd {
__be32 desc_tag; /* FCNVME_LSDESC_xxx */
__be32 desc_len;
__be16 ersp_ratio;
__be16 rsvd10;
__be32 rsvd12[9];
__be16 cntlid;
__be16 sqsize;
__be32 rsvd52;
uuid_t hostid;
u8 hostnqn[FCNVME_ASSOC_HOSTNQN_LEN];
u8 subnqn[FCNVME_ASSOC_SUBNQN_LEN];
__be32 rsvd584[108]; /* pad to 1016 bytes,
* which makes overall LS rqst
* payload 1024 bytes
*/
};
#define FCNVME_LSDESC_CRA_CMD_DESC_MINLEN \
offsetof(struct fcnvme_lsdesc_cr_assoc_cmd, rsvd584)
#define FCNVME_LSDESC_CRA_CMD_DESC_MIN_DESCLEN \
(FCNVME_LSDESC_CRA_CMD_DESC_MINLEN - \
offsetof(struct fcnvme_lsdesc_cr_assoc_cmd, ersp_ratio))
/* FCNVME_LSDESC_CREATE_CONN_CMD */
struct fcnvme_lsdesc_cr_conn_cmd {
__be32 desc_tag; /* FCNVME_LSDESC_xxx */
__be32 desc_len;
__be16 ersp_ratio;
__be16 rsvd10;
__be32 rsvd12[9];
__be16 qid;
__be16 sqsize;
__be32 rsvd52;
};
/* Disconnect Scope Values */
enum {
FCNVME_DISCONN_ASSOCIATION = 0,
FCNVME_DISCONN_CONNECTION = 1,
};
/* FCNVME_LSDESC_DISCONN_CMD */
struct fcnvme_lsdesc_disconn_cmd {
__be32 desc_tag; /* FCNVME_LSDESC_xxx */
__be32 desc_len;
u8 rsvd8[3];
/* note: scope is really a 1 bit field */
u8 scope; /* FCNVME_DISCONN_xxx */
__be32 rsvd12;
__be64 id;
};
/* FCNVME_LSDESC_CONN_ID */
struct fcnvme_lsdesc_conn_id {
__be32 desc_tag; /* FCNVME_LSDESC_xxx */
__be32 desc_len;
__be64 connection_id;
};
/* FCNVME_LSDESC_ASSOC_ID */
struct fcnvme_lsdesc_assoc_id {
__be32 desc_tag; /* FCNVME_LSDESC_xxx */
__be32 desc_len;
__be64 association_id;
};
/* r_ctl values */
enum {
FCNVME_RS_RCTL_DATA = 1,
FCNVME_RS_RCTL_XFER_RDY = 5,
FCNVME_RS_RCTL_RSP = 8,
};
/* ********** start of Link Services ********** */
/* FCNVME_LS_RJT */
struct fcnvme_ls_rjt {
struct fcnvme_ls_rqst_w0 w0;
__be32 desc_list_len;
struct fcnvme_lsdesc_rqst rqst;
struct fcnvme_lsdesc_rjt rjt;
};
/* FCNVME_LS_ACC */
struct fcnvme_ls_acc_hdr {
struct fcnvme_ls_rqst_w0 w0;
__be32 desc_list_len;
struct fcnvme_lsdesc_rqst rqst;
/* Followed by cmd-specific ACC descriptors, see next definitions */
};
/* FCNVME_LS_CREATE_ASSOCIATION */
struct fcnvme_ls_cr_assoc_rqst {
struct fcnvme_ls_rqst_w0 w0;
__be32 desc_list_len;
struct fcnvme_lsdesc_cr_assoc_cmd assoc_cmd;
};
#define FCNVME_LSDESC_CRA_RQST_MINLEN \
(offsetof(struct fcnvme_ls_cr_assoc_rqst, assoc_cmd) + \
FCNVME_LSDESC_CRA_CMD_DESC_MINLEN)
#define FCNVME_LSDESC_CRA_RQST_MIN_LISTLEN \
FCNVME_LSDESC_CRA_CMD_DESC_MINLEN
struct fcnvme_ls_cr_assoc_acc {
struct fcnvme_ls_acc_hdr hdr;
struct fcnvme_lsdesc_assoc_id associd;
struct fcnvme_lsdesc_conn_id connectid;
};
/* FCNVME_LS_CREATE_CONNECTION */
struct fcnvme_ls_cr_conn_rqst {
struct fcnvme_ls_rqst_w0 w0;
__be32 desc_list_len;
struct fcnvme_lsdesc_assoc_id associd;
struct fcnvme_lsdesc_cr_conn_cmd connect_cmd;
};
struct fcnvme_ls_cr_conn_acc {
struct fcnvme_ls_acc_hdr hdr;
struct fcnvme_lsdesc_conn_id connectid;
};
/* FCNVME_LS_DISCONNECT */
struct fcnvme_ls_disconnect_rqst {
struct fcnvme_ls_rqst_w0 w0;
__be32 desc_list_len;
struct fcnvme_lsdesc_assoc_id associd;
struct fcnvme_lsdesc_disconn_cmd discon_cmd;
};
struct fcnvme_ls_disconnect_acc {
struct fcnvme_ls_acc_hdr hdr;
};
/*
* Yet to be defined in FC-NVME:
*/
#define NVME_FC_CONNECT_TIMEOUT_SEC 2 /* 2 seconds */
#define NVME_FC_LS_TIMEOUT_SEC 2 /* 2 seconds */
#define NVME_FC_TGTOP_TIMEOUT_SEC 2 /* 2 seconds */
/*
* TRADDR string must be of form "nn-<16hexdigits>:pn-<16hexdigits>"
* the string is allowed to be specified with or without a "0x" prefix
* infront of the <16hexdigits>. Without is considered the "min" string
* and with is considered the "max" string. The hexdigits may be upper
* or lower case.
*/
#define NVME_FC_TRADDR_NNLEN 3 /* "?n-" */
#define NVME_FC_TRADDR_OXNNLEN 5 /* "?n-0x" */
#define NVME_FC_TRADDR_HEXNAMELEN 16
#define NVME_FC_TRADDR_MINLENGTH \
(2 * (NVME_FC_TRADDR_NNLEN + NVME_FC_TRADDR_HEXNAMELEN) + 1)
#define NVME_FC_TRADDR_MAXLENGTH \
(2 * (NVME_FC_TRADDR_OXNNLEN + NVME_FC_TRADDR_HEXNAMELEN) + 1)
#define NVME_FC_TRADDR_MIN_PN_OFFSET \
(NVME_FC_TRADDR_NNLEN + NVME_FC_TRADDR_HEXNAMELEN + 1)
#define NVME_FC_TRADDR_MAX_PN_OFFSET \
(NVME_FC_TRADDR_OXNNLEN + NVME_FC_TRADDR_HEXNAMELEN + 1)
#endif /* _NVME_FC_H */
