228 строки
6.0 KiB
C
228 строки
6.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2016, Avago Technologies
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*/
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#ifndef _NVME_FC_TRANSPORT_H
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#define _NVME_FC_TRANSPORT_H 1
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/*
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* Common definitions between the nvme_fc (host) transport and
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* nvmet_fc (target) transport implementation.
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*/
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/*
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* ****************** FC-NVME LS HANDLING ******************
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*/
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union nvmefc_ls_requests {
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struct fcnvme_ls_rqst_w0 w0;
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struct fcnvme_ls_cr_assoc_rqst rq_cr_assoc;
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struct fcnvme_ls_cr_conn_rqst rq_cr_conn;
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struct fcnvme_ls_disconnect_assoc_rqst rq_dis_assoc;
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struct fcnvme_ls_disconnect_conn_rqst rq_dis_conn;
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} __aligned(128); /* alignment for other things alloc'd with */
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union nvmefc_ls_responses {
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struct fcnvme_ls_rjt rsp_rjt;
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struct fcnvme_ls_cr_assoc_acc rsp_cr_assoc;
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struct fcnvme_ls_cr_conn_acc rsp_cr_conn;
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struct fcnvme_ls_disconnect_assoc_acc rsp_dis_assoc;
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struct fcnvme_ls_disconnect_conn_acc rsp_dis_conn;
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} __aligned(128); /* alignment for other things alloc'd with */
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static inline void
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nvme_fc_format_rsp_hdr(void *buf, u8 ls_cmd, __be32 desc_len, u8 rqst_ls_cmd)
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{
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struct fcnvme_ls_acc_hdr *acc = buf;
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acc->w0.ls_cmd = ls_cmd;
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acc->desc_list_len = desc_len;
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acc->rqst.desc_tag = cpu_to_be32(FCNVME_LSDESC_RQST);
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acc->rqst.desc_len =
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fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_rqst));
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acc->rqst.w0.ls_cmd = rqst_ls_cmd;
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}
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static inline int
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nvme_fc_format_rjt(void *buf, u16 buflen, u8 ls_cmd,
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u8 reason, u8 explanation, u8 vendor)
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{
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struct fcnvme_ls_rjt *rjt = buf;
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nvme_fc_format_rsp_hdr(buf, FCNVME_LSDESC_RQST,
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fcnvme_lsdesc_len(sizeof(struct fcnvme_ls_rjt)),
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ls_cmd);
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rjt->rjt.desc_tag = cpu_to_be32(FCNVME_LSDESC_RJT);
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rjt->rjt.desc_len = fcnvme_lsdesc_len(sizeof(struct fcnvme_lsdesc_rjt));
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rjt->rjt.reason_code = reason;
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rjt->rjt.reason_explanation = explanation;
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rjt->rjt.vendor = vendor;
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return sizeof(struct fcnvme_ls_rjt);
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}
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/* Validation Error indexes into the string table below */
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enum {
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VERR_NO_ERROR = 0,
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VERR_CR_ASSOC_LEN = 1,
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VERR_CR_ASSOC_RQST_LEN = 2,
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VERR_CR_ASSOC_CMD = 3,
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VERR_CR_ASSOC_CMD_LEN = 4,
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VERR_ERSP_RATIO = 5,
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VERR_ASSOC_ALLOC_FAIL = 6,
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VERR_QUEUE_ALLOC_FAIL = 7,
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VERR_CR_CONN_LEN = 8,
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VERR_CR_CONN_RQST_LEN = 9,
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VERR_ASSOC_ID = 10,
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VERR_ASSOC_ID_LEN = 11,
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VERR_NO_ASSOC = 12,
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VERR_CONN_ID = 13,
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VERR_CONN_ID_LEN = 14,
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VERR_INVAL_CONN = 15,
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VERR_CR_CONN_CMD = 16,
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VERR_CR_CONN_CMD_LEN = 17,
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VERR_DISCONN_LEN = 18,
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VERR_DISCONN_RQST_LEN = 19,
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VERR_DISCONN_CMD = 20,
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VERR_DISCONN_CMD_LEN = 21,
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VERR_DISCONN_SCOPE = 22,
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VERR_RS_LEN = 23,
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VERR_RS_RQST_LEN = 24,
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VERR_RS_CMD = 25,
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VERR_RS_CMD_LEN = 26,
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VERR_RS_RCTL = 27,
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VERR_RS_RO = 28,
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VERR_LSACC = 29,
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VERR_LSDESC_RQST = 30,
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VERR_LSDESC_RQST_LEN = 31,
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VERR_CR_ASSOC = 32,
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VERR_CR_ASSOC_ACC_LEN = 33,
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VERR_CR_CONN = 34,
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VERR_CR_CONN_ACC_LEN = 35,
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VERR_DISCONN = 36,
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VERR_DISCONN_ACC_LEN = 37,
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};
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static char *validation_errors[] = {
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"OK",
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"Bad CR_ASSOC Length",
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"Bad CR_ASSOC Rqst Length",
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"Not CR_ASSOC Cmd",
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"Bad CR_ASSOC Cmd Length",
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"Bad Ersp Ratio",
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"Association Allocation Failed",
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"Queue Allocation Failed",
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"Bad CR_CONN Length",
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"Bad CR_CONN Rqst Length",
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"Not Association ID",
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"Bad Association ID Length",
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"No Association",
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"Not Connection ID",
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"Bad Connection ID Length",
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"Invalid Connection ID",
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"Not CR_CONN Cmd",
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"Bad CR_CONN Cmd Length",
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"Bad DISCONN Length",
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"Bad DISCONN Rqst Length",
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"Not DISCONN Cmd",
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"Bad DISCONN Cmd Length",
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"Bad Disconnect Scope",
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"Bad RS Length",
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"Bad RS Rqst Length",
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"Not RS Cmd",
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"Bad RS Cmd Length",
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"Bad RS R_CTL",
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"Bad RS Relative Offset",
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"Not LS_ACC",
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"Not LSDESC_RQST",
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"Bad LSDESC_RQST Length",
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"Not CR_ASSOC Rqst",
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"Bad CR_ASSOC ACC Length",
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"Not CR_CONN Rqst",
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"Bad CR_CONN ACC Length",
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"Not Disconnect Rqst",
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"Bad Disconnect ACC Length",
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};
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#define NVME_FC_LAST_LS_CMD_VALUE FCNVME_LS_DISCONNECT_CONN
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static char *nvmefc_ls_names[] = {
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"Reserved (0)",
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"RJT (1)",
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"ACC (2)",
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"Create Association",
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"Create Connection",
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"Disconnect Association",
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"Disconnect Connection",
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};
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static inline void
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nvmefc_fmt_lsreq_discon_assoc(struct nvmefc_ls_req *lsreq,
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struct fcnvme_ls_disconnect_assoc_rqst *discon_rqst,
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struct fcnvme_ls_disconnect_assoc_acc *discon_acc,
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u64 association_id)
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{
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lsreq->rqstaddr = discon_rqst;
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lsreq->rqstlen = sizeof(*discon_rqst);
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lsreq->rspaddr = discon_acc;
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lsreq->rsplen = sizeof(*discon_acc);
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lsreq->timeout = NVME_FC_LS_TIMEOUT_SEC;
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discon_rqst->w0.ls_cmd = FCNVME_LS_DISCONNECT_ASSOC;
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discon_rqst->desc_list_len = cpu_to_be32(
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sizeof(struct fcnvme_lsdesc_assoc_id) +
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sizeof(struct fcnvme_lsdesc_disconn_cmd));
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discon_rqst->associd.desc_tag = cpu_to_be32(FCNVME_LSDESC_ASSOC_ID);
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discon_rqst->associd.desc_len =
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fcnvme_lsdesc_len(
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sizeof(struct fcnvme_lsdesc_assoc_id));
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discon_rqst->associd.association_id = cpu_to_be64(association_id);
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discon_rqst->discon_cmd.desc_tag = cpu_to_be32(
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FCNVME_LSDESC_DISCONN_CMD);
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discon_rqst->discon_cmd.desc_len =
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fcnvme_lsdesc_len(
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sizeof(struct fcnvme_lsdesc_disconn_cmd));
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}
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static inline int
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nvmefc_vldt_lsreq_discon_assoc(u32 rqstlen,
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struct fcnvme_ls_disconnect_assoc_rqst *rqst)
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{
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int ret = 0;
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if (rqstlen < sizeof(struct fcnvme_ls_disconnect_assoc_rqst))
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ret = VERR_DISCONN_LEN;
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else if (rqst->desc_list_len !=
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fcnvme_lsdesc_len(
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sizeof(struct fcnvme_ls_disconnect_assoc_rqst)))
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ret = VERR_DISCONN_RQST_LEN;
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else if (rqst->associd.desc_tag != cpu_to_be32(FCNVME_LSDESC_ASSOC_ID))
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ret = VERR_ASSOC_ID;
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else if (rqst->associd.desc_len !=
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fcnvme_lsdesc_len(
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sizeof(struct fcnvme_lsdesc_assoc_id)))
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ret = VERR_ASSOC_ID_LEN;
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else if (rqst->discon_cmd.desc_tag !=
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cpu_to_be32(FCNVME_LSDESC_DISCONN_CMD))
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ret = VERR_DISCONN_CMD;
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else if (rqst->discon_cmd.desc_len !=
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fcnvme_lsdesc_len(
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sizeof(struct fcnvme_lsdesc_disconn_cmd)))
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ret = VERR_DISCONN_CMD_LEN;
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/*
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* As the standard changed on the LS, check if old format and scope
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* something other than Association (e.g. 0).
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*/
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else if (rqst->discon_cmd.rsvd8[0])
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ret = VERR_DISCONN_SCOPE;
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return ret;
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}
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#endif /* _NVME_FC_TRANSPORT_H */
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