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