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scsi: elx: libefc: Generic state machine framework
Start the population of the libefc library. The library will contain common tasks usable by a target or initiator driver. The library will also contain a FC discovery state machine interface. Creates the library directory and add definitions for the discovery state machine interface. Link: https://lore.kernel.org/r/20210601235512.20104-9-jsmart2021@gmail.com Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Daniel Wagner <dwagner@suse.de> Co-developed-by: Ram Vegesna <ram.vegesna@broadcom.com> Signed-off-by: Ram Vegesna <ram.vegesna@broadcom.com> Signed-off-by: James Smart <jsmart2021@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
James Smart
Martin K. Petersen
parent
388f36edec
commit
5aa09c4868
54
drivers/scsi/elx/libefc/efc_sm.c
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54
drivers/scsi/elx/libefc/efc_sm.c
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2021 Broadcom. All Rights Reserved. The term
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* “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
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*/
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/*
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* Generic state machine framework.
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*/
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#include "efc.h"
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#include "efc_sm.h"
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/**
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* efc_sm_post_event() - Post an event to a context.
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*
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* @ctx: State machine context
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* @evt: Event to post
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* @data: Event-specific data (if any)
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*/
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int
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efc_sm_post_event(struct efc_sm_ctx *ctx,
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enum efc_sm_event evt, void *data)
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{
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if (!ctx->current_state)
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return -EIO;
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ctx->current_state(ctx, evt, data);
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return 0;
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}
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void
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efc_sm_transition(struct efc_sm_ctx *ctx,
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void (*state)(struct efc_sm_ctx *,
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enum efc_sm_event, void *), void *data)
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{
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if (ctx->current_state == state) {
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efc_sm_post_event(ctx, EFC_EVT_REENTER, data);
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} else {
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efc_sm_post_event(ctx, EFC_EVT_EXIT, data);
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ctx->current_state = state;
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efc_sm_post_event(ctx, EFC_EVT_ENTER, data);
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}
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}
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static char *event_name[] = EFC_SM_EVENT_NAME;
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const char *efc_sm_event_name(enum efc_sm_event evt)
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{
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if (evt > EFC_EVT_LAST)
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return "unknown";
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return event_name[evt];
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}
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197
drivers/scsi/elx/libefc/efc_sm.h
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197
drivers/scsi/elx/libefc/efc_sm.h
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2021 Broadcom. All Rights Reserved. The term
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* “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
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*
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*/
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/**
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* Generic state machine framework declarations.
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*/
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#ifndef _EFC_SM_H
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#define _EFC_SM_H
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struct efc_sm_ctx;
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/* State Machine events */
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enum efc_sm_event {
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/* Common Events */
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EFC_EVT_ENTER,
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EFC_EVT_REENTER,
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EFC_EVT_EXIT,
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EFC_EVT_SHUTDOWN,
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EFC_EVT_ALL_CHILD_NODES_FREE,
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EFC_EVT_RESUME,
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EFC_EVT_TIMER_EXPIRED,
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/* Domain Events */
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EFC_EVT_RESPONSE,
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EFC_EVT_ERROR,
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EFC_EVT_DOMAIN_FOUND,
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EFC_EVT_DOMAIN_ALLOC_OK,
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EFC_EVT_DOMAIN_ALLOC_FAIL,
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EFC_EVT_DOMAIN_REQ_ATTACH,
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EFC_EVT_DOMAIN_ATTACH_OK,
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EFC_EVT_DOMAIN_ATTACH_FAIL,
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EFC_EVT_DOMAIN_LOST,
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EFC_EVT_DOMAIN_FREE_OK,
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EFC_EVT_DOMAIN_FREE_FAIL,
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EFC_EVT_HW_DOMAIN_REQ_ATTACH,
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EFC_EVT_HW_DOMAIN_REQ_FREE,
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/* Sport Events */
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EFC_EVT_NPORT_ALLOC_OK,
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EFC_EVT_NPORT_ALLOC_FAIL,
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EFC_EVT_NPORT_ATTACH_OK,
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EFC_EVT_NPORT_ATTACH_FAIL,
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EFC_EVT_NPORT_FREE_OK,
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EFC_EVT_NPORT_FREE_FAIL,
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EFC_EVT_NPORT_TOPOLOGY_NOTIFY,
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EFC_EVT_HW_PORT_ALLOC_OK,
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EFC_EVT_HW_PORT_ALLOC_FAIL,
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EFC_EVT_HW_PORT_ATTACH_OK,
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EFC_EVT_HW_PORT_REQ_ATTACH,
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EFC_EVT_HW_PORT_REQ_FREE,
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EFC_EVT_HW_PORT_FREE_OK,
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/* Login Events */
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EFC_EVT_SRRS_ELS_REQ_OK,
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EFC_EVT_SRRS_ELS_CMPL_OK,
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EFC_EVT_SRRS_ELS_REQ_FAIL,
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EFC_EVT_SRRS_ELS_CMPL_FAIL,
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EFC_EVT_SRRS_ELS_REQ_RJT,
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EFC_EVT_NODE_ATTACH_OK,
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EFC_EVT_NODE_ATTACH_FAIL,
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EFC_EVT_NODE_FREE_OK,
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EFC_EVT_NODE_FREE_FAIL,
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EFC_EVT_ELS_FRAME,
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EFC_EVT_ELS_REQ_TIMEOUT,
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EFC_EVT_ELS_REQ_ABORTED,
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/* request an ELS IO be aborted */
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EFC_EVT_ABORT_ELS,
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/* ELS abort process complete */
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EFC_EVT_ELS_ABORT_CMPL,
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EFC_EVT_ABTS_RCVD,
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/* node is not in the GID_PT payload */
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EFC_EVT_NODE_MISSING,
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/* node is allocated and in the GID_PT payload */
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EFC_EVT_NODE_REFOUND,
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/* node shutting down due to PLOGI recvd (implicit logo) */
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EFC_EVT_SHUTDOWN_IMPLICIT_LOGO,
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/* node shutting down due to LOGO recvd/sent (explicit logo) */
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EFC_EVT_SHUTDOWN_EXPLICIT_LOGO,
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EFC_EVT_PLOGI_RCVD,
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EFC_EVT_FLOGI_RCVD,
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EFC_EVT_LOGO_RCVD,
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EFC_EVT_PRLI_RCVD,
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EFC_EVT_PRLO_RCVD,
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EFC_EVT_PDISC_RCVD,
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EFC_EVT_FDISC_RCVD,
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EFC_EVT_ADISC_RCVD,
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EFC_EVT_RSCN_RCVD,
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EFC_EVT_SCR_RCVD,
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EFC_EVT_ELS_RCVD,
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EFC_EVT_FCP_CMD_RCVD,
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EFC_EVT_GIDPT_DELAY_EXPIRED,
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/* SCSI Target Server events */
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EFC_EVT_NODE_ACTIVE_IO_LIST_EMPTY,
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EFC_EVT_NODE_DEL_INI_COMPLETE,
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EFC_EVT_NODE_DEL_TGT_COMPLETE,
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EFC_EVT_NODE_SESS_REG_OK,
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EFC_EVT_NODE_SESS_REG_FAIL,
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/* Must be last */
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EFC_EVT_LAST
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};
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/* State Machine event name lookup array */
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#define EFC_SM_EVENT_NAME { \
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[EFC_EVT_ENTER] = "EFC_EVT_ENTER", \
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[EFC_EVT_REENTER] = "EFC_EVT_REENTER", \
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[EFC_EVT_EXIT] = "EFC_EVT_EXIT", \
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[EFC_EVT_SHUTDOWN] = "EFC_EVT_SHUTDOWN", \
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[EFC_EVT_ALL_CHILD_NODES_FREE] = "EFC_EVT_ALL_CHILD_NODES_FREE",\
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[EFC_EVT_RESUME] = "EFC_EVT_RESUME", \
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[EFC_EVT_TIMER_EXPIRED] = "EFC_EVT_TIMER_EXPIRED", \
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[EFC_EVT_RESPONSE] = "EFC_EVT_RESPONSE", \
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[EFC_EVT_ERROR] = "EFC_EVT_ERROR", \
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[EFC_EVT_DOMAIN_FOUND] = "EFC_EVT_DOMAIN_FOUND", \
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[EFC_EVT_DOMAIN_ALLOC_OK] = "EFC_EVT_DOMAIN_ALLOC_OK", \
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[EFC_EVT_DOMAIN_ALLOC_FAIL] = "EFC_EVT_DOMAIN_ALLOC_FAIL", \
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[EFC_EVT_DOMAIN_REQ_ATTACH] = "EFC_EVT_DOMAIN_REQ_ATTACH", \
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[EFC_EVT_DOMAIN_ATTACH_OK] = "EFC_EVT_DOMAIN_ATTACH_OK", \
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[EFC_EVT_DOMAIN_ATTACH_FAIL] = "EFC_EVT_DOMAIN_ATTACH_FAIL", \
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[EFC_EVT_DOMAIN_LOST] = "EFC_EVT_DOMAIN_LOST", \
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[EFC_EVT_DOMAIN_FREE_OK] = "EFC_EVT_DOMAIN_FREE_OK", \
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[EFC_EVT_DOMAIN_FREE_FAIL] = "EFC_EVT_DOMAIN_FREE_FAIL", \
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[EFC_EVT_HW_DOMAIN_REQ_ATTACH] = "EFC_EVT_HW_DOMAIN_REQ_ATTACH",\
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[EFC_EVT_HW_DOMAIN_REQ_FREE] = "EFC_EVT_HW_DOMAIN_REQ_FREE", \
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[EFC_EVT_NPORT_ALLOC_OK] = "EFC_EVT_NPORT_ALLOC_OK", \
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[EFC_EVT_NPORT_ALLOC_FAIL] = "EFC_EVT_NPORT_ALLOC_FAIL", \
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[EFC_EVT_NPORT_ATTACH_OK] = "EFC_EVT_NPORT_ATTACH_OK", \
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[EFC_EVT_NPORT_ATTACH_FAIL] = "EFC_EVT_NPORT_ATTACH_FAIL", \
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[EFC_EVT_NPORT_FREE_OK] = "EFC_EVT_NPORT_FREE_OK", \
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[EFC_EVT_NPORT_FREE_FAIL] = "EFC_EVT_NPORT_FREE_FAIL", \
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[EFC_EVT_NPORT_TOPOLOGY_NOTIFY] = "EFC_EVT_NPORT_TOPOLOGY_NOTIFY",\
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[EFC_EVT_HW_PORT_ALLOC_OK] = "EFC_EVT_HW_PORT_ALLOC_OK", \
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[EFC_EVT_HW_PORT_ALLOC_FAIL] = "EFC_EVT_HW_PORT_ALLOC_FAIL", \
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[EFC_EVT_HW_PORT_ATTACH_OK] = "EFC_EVT_HW_PORT_ATTACH_OK", \
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[EFC_EVT_HW_PORT_REQ_ATTACH] = "EFC_EVT_HW_PORT_REQ_ATTACH", \
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[EFC_EVT_HW_PORT_REQ_FREE] = "EFC_EVT_HW_PORT_REQ_FREE", \
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[EFC_EVT_HW_PORT_FREE_OK] = "EFC_EVT_HW_PORT_FREE_OK", \
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[EFC_EVT_SRRS_ELS_REQ_OK] = "EFC_EVT_SRRS_ELS_REQ_OK", \
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[EFC_EVT_SRRS_ELS_CMPL_OK] = "EFC_EVT_SRRS_ELS_CMPL_OK", \
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[EFC_EVT_SRRS_ELS_REQ_FAIL] = "EFC_EVT_SRRS_ELS_REQ_FAIL", \
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[EFC_EVT_SRRS_ELS_CMPL_FAIL] = "EFC_EVT_SRRS_ELS_CMPL_FAIL", \
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[EFC_EVT_SRRS_ELS_REQ_RJT] = "EFC_EVT_SRRS_ELS_REQ_RJT", \
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[EFC_EVT_NODE_ATTACH_OK] = "EFC_EVT_NODE_ATTACH_OK", \
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[EFC_EVT_NODE_ATTACH_FAIL] = "EFC_EVT_NODE_ATTACH_FAIL", \
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[EFC_EVT_NODE_FREE_OK] = "EFC_EVT_NODE_FREE_OK", \
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[EFC_EVT_NODE_FREE_FAIL] = "EFC_EVT_NODE_FREE_FAIL", \
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[EFC_EVT_ELS_FRAME] = "EFC_EVT_ELS_FRAME", \
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[EFC_EVT_ELS_REQ_TIMEOUT] = "EFC_EVT_ELS_REQ_TIMEOUT", \
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[EFC_EVT_ELS_REQ_ABORTED] = "EFC_EVT_ELS_REQ_ABORTED", \
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[EFC_EVT_ABORT_ELS] = "EFC_EVT_ABORT_ELS", \
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[EFC_EVT_ELS_ABORT_CMPL] = "EFC_EVT_ELS_ABORT_CMPL", \
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[EFC_EVT_ABTS_RCVD] = "EFC_EVT_ABTS_RCVD", \
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[EFC_EVT_NODE_MISSING] = "EFC_EVT_NODE_MISSING", \
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[EFC_EVT_NODE_REFOUND] = "EFC_EVT_NODE_REFOUND", \
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[EFC_EVT_SHUTDOWN_IMPLICIT_LOGO] = "EFC_EVT_SHUTDOWN_IMPLICIT_LOGO",\
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[EFC_EVT_SHUTDOWN_EXPLICIT_LOGO] = "EFC_EVT_SHUTDOWN_EXPLICIT_LOGO",\
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[EFC_EVT_PLOGI_RCVD] = "EFC_EVT_PLOGI_RCVD", \
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[EFC_EVT_FLOGI_RCVD] = "EFC_EVT_FLOGI_RCVD", \
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[EFC_EVT_LOGO_RCVD] = "EFC_EVT_LOGO_RCVD", \
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[EFC_EVT_PRLI_RCVD] = "EFC_EVT_PRLI_RCVD", \
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[EFC_EVT_PRLO_RCVD] = "EFC_EVT_PRLO_RCVD", \
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[EFC_EVT_PDISC_RCVD] = "EFC_EVT_PDISC_RCVD", \
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[EFC_EVT_FDISC_RCVD] = "EFC_EVT_FDISC_RCVD", \
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[EFC_EVT_ADISC_RCVD] = "EFC_EVT_ADISC_RCVD", \
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[EFC_EVT_RSCN_RCVD] = "EFC_EVT_RSCN_RCVD", \
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[EFC_EVT_SCR_RCVD] = "EFC_EVT_SCR_RCVD", \
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[EFC_EVT_ELS_RCVD] = "EFC_EVT_ELS_RCVD", \
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[EFC_EVT_FCP_CMD_RCVD] = "EFC_EVT_FCP_CMD_RCVD", \
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[EFC_EVT_NODE_DEL_INI_COMPLETE] = "EFC_EVT_NODE_DEL_INI_COMPLETE",\
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[EFC_EVT_NODE_DEL_TGT_COMPLETE] = "EFC_EVT_NODE_DEL_TGT_COMPLETE",\
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[EFC_EVT_LAST] = "EFC_EVT_LAST", \
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}
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int
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efc_sm_post_event(struct efc_sm_ctx *ctx,
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enum efc_sm_event evt, void *data);
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void
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efc_sm_transition(struct efc_sm_ctx *ctx,
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void (*state)(struct efc_sm_ctx *ctx,
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enum efc_sm_event evt, void *arg),
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void *data);
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void efc_sm_disable(struct efc_sm_ctx *ctx);
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const char *efc_sm_event_name(enum efc_sm_event evt);
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#endif /* ! _EFC_SM_H */
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