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Release 4.12 include/linux/nvme-fc.h

Directory: include/linux
/*
 * Copyright (c) 2016 Avago Technologies.  All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful.
 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
 * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE DISCLAIMED, EXCEPT TO
 * THE EXTENT THAT SUCH DISCLAIMERS ARE HELD TO BE LEGALLY INVALID.
 * See the GNU General Public License for more details, a copy of which
 * can be found in the file COPYING included with this package
 *
 */

/*
 * This file contains definitions relative to FC-NVME r1.14 (16-020vB).
 */

#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))); }

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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_HOSTID_LEN 16 #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; u8 hostid[FCNVME_ASSOC_HOSTID_LEN]; u8 hostnqn[FCNVME_ASSOC_HOSTNQN_LEN]; u8 subnqn[FCNVME_ASSOC_SUBNQN_LEN]; u8 rsvd632[384]; }; /* 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; }; 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 */ #endif /* _NVME_FC_H */

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Directory: include/linux
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