439 lines
9.7 KiB
C
439 lines
9.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2016 Avago Technologies. All rights reserved.
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*/
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/*
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* This file contains definitions relative to FC-NVME-2 r1.08
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* (T11-2019-00210-v004).
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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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#include <uapi/scsi/fc/fc_fs.h>
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#define NVME_CMD_FORMAT_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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enum {
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FCNVME_CMD_FLAGS_DIRMASK = 0x03,
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FCNVME_CMD_FLAGS_WRITE = (1 << 0),
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FCNVME_CMD_FLAGS_READ = (1 << 1),
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FCNVME_CMD_FLAGS_PICWP = (1 << 2),
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};
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enum {
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FCNVME_CMD_CAT_MASK = 0x0F,
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FCNVME_CMD_CAT_ADMINQ = 0x01,
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FCNVME_CMD_CAT_CSSMASK = 0x07,
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FCNVME_CMD_CAT_CSSFLAG = 0x08,
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};
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static inline __u8 fccmnd_set_cat_admin(__u8 rsv_cat)
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{
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return (rsv_cat & ~FCNVME_CMD_CAT_MASK) | FCNVME_CMD_CAT_ADMINQ;
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}
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static inline __u8 fccmnd_set_cat_css(__u8 rsv_cat, __u8 css)
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{
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return (rsv_cat & ~FCNVME_CMD_CAT_MASK) | FCNVME_CMD_CAT_CSSFLAG |
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(css & FCNVME_CMD_CAT_CSSMASK);
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}
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struct nvme_fc_cmd_iu {
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__u8 format_id;
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__u8 fc_id;
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__be16 iu_len;
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__u8 rsvd4[2];
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__u8 rsv_cat;
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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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__u8 dps;
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__u8 lbads;
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__be16 ms;
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__be32 rsvd92;
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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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/* reserved 2 */
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FCNVME_SC_ILL_CONN_PARAMS = 3,
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};
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struct nvme_fc_ersp_iu {
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__u8 ersp_result;
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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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#define FCNVME_NVME_SR_OPCODE 0x01
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#define FCNVME_NVME_SR_RSP_OPCODE 0x02
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struct nvme_fc_nvme_sr_iu {
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__u8 fc_id;
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__u8 opcode;
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__u8 rsvd2;
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__u8 retry_rctl;
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__be32 rsvd4;
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};
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enum {
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FCNVME_SRSTAT_ACC = 0x0,
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/* reserved 0x1 */
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/* reserved 0x2 */
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FCNVME_SRSTAT_LOGICAL_ERR = 0x3,
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FCNVME_SRSTAT_INV_QUALIF = 0x4,
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FCNVME_SRSTAT_UNABL2PERFORM = 0x9,
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};
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struct nvme_fc_nvme_sr_rsp_iu {
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__u8 fc_id;
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__u8 opcode;
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__u8 rsvd2;
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__u8 status;
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__be32 rsvd4;
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};
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/* FC-NVME Link Services - LS cmd values (w0 bits 31:24) */
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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, /* Create Association */
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FCNVME_LS_CREATE_CONNECTION = 4, /* Create I/O Connection */
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FCNVME_LS_DISCONNECT_ASSOC = 5, /* Disconnect Association */
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FCNVME_LS_DISCONNECT_CONN = 6, /* Disconnect Connection */
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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_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_INV_PARAM = 0x42,
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/* Invalid Parameters */
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FCNVME_RJT_RC_INSUF_RES = 0x43,
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/* Insufficient Resources */
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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_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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FCNVME_RJT_EXP_INV_ERSP_RAT = 0x40,
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/* Invalid NVMe_ERSP Ratio */
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FCNVME_RJT_EXP_INV_CTLR_ID = 0x41,
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/* Invalid Controller ID */
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FCNVME_RJT_EXP_INV_QUEUE_ID = 0x42,
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/* Invalid Queue ID */
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FCNVME_RJT_EXP_INV_SQSIZE = 0x43,
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/* Invalid Submission Queue Size */
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FCNVME_RJT_EXP_INV_HOSTID = 0x44,
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/* Invalid HOST ID */
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FCNVME_RJT_EXP_INV_HOSTNQN = 0x45,
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/* Invalid HOSTNQN */
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FCNVME_RJT_EXP_INV_SUBNQN = 0x46,
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/* Invalid SUBNQN */
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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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/* 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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__be32 rsvd8[4];
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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_CMND = 0x6,
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FCNVME_RS_RCTL_DATA = 0x1,
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FCNVME_RS_RCTL_CONF = 0x3,
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FCNVME_RS_RCTL_SR = 0x9,
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FCNVME_RS_RCTL_XFER_RDY = 0x5,
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FCNVME_RS_RCTL_RSP = 0x7,
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FCNVME_RS_RCTL_ERSP = 0x8,
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FCNVME_RS_RCTL_SR_RSP = 0xA,
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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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/*
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* Followed by cmd-specific ACCEPT descriptors, see xxx_acc
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* definitions below
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*/
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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_ASSOC */
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struct fcnvme_ls_disconnect_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_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_assoc_acc {
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struct fcnvme_ls_acc_hdr hdr;
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};
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/* FCNVME_LS_DISCONNECT_CONN */
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struct fcnvme_ls_disconnect_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_conn_id connectid;
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};
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struct fcnvme_ls_disconnect_conn_acc {
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struct fcnvme_ls_acc_hdr hdr;
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};
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/*
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* Default R_A_TOV is pulled in from fc_fs.h but needs conversion
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* from ms to seconds for our use.
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*/
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#define FC_TWO_TIMES_R_A_TOV (2 * (FC_DEF_R_A_TOV / 1000))
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#define NVME_FC_LS_TIMEOUT_SEC FC_TWO_TIMES_R_A_TOV
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#define NVME_FC_TGTOP_TIMEOUT_SEC FC_TWO_TIMES_R_A_TOV
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/*
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* TRADDR string must be of form "nn-<16hexdigits>:pn-<16hexdigits>"
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* the string is allowed to be specified with or without a "0x" prefix
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* infront of the <16hexdigits>. Without is considered the "min" string
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* and with is considered the "max" string. The hexdigits may be upper
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* or lower case.
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* Note: FC-NVME-2 standard requires a "0x" prefix.
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*/
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#define NVME_FC_TRADDR_NNLEN 3 /* "?n-" */
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#define NVME_FC_TRADDR_OXNNLEN 5 /* "?n-0x" */
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#define NVME_FC_TRADDR_HEXNAMELEN 16
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#define NVME_FC_TRADDR_MINLENGTH \
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(2 * (NVME_FC_TRADDR_NNLEN + NVME_FC_TRADDR_HEXNAMELEN) + 1)
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#define NVME_FC_TRADDR_MAXLENGTH \
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(2 * (NVME_FC_TRADDR_OXNNLEN + NVME_FC_TRADDR_HEXNAMELEN) + 1)
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#define NVME_FC_TRADDR_MIN_PN_OFFSET \
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(NVME_FC_TRADDR_NNLEN + NVME_FC_TRADDR_HEXNAMELEN + 1)
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#define NVME_FC_TRADDR_MAX_PN_OFFSET \
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(NVME_FC_TRADDR_OXNNLEN + NVME_FC_TRADDR_HEXNAMELEN + 1)
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#endif /* _NVME_FC_H */
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