Skip to content

L
linux
Commit 5aa09c48 authored by James Smart's avatar James Smart Committed by Martin K. Petersen
Browse files
Options

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.comReviewed-by: default avatarHannes Reinecke <hare@suse.de>
Reviewed-by: default avatarDaniel Wagner <dwagner@suse.de>
Co-developed-by: default avatarRam Vegesna <ram.vegesna@broadcom.com>
Signed-off-by: default avatarRam Vegesna <ram.vegesna@broadcom.com>
Signed-off-by: default avatarJames Smart <jsmart2021@gmail.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 388f36ed
Hide whitespace changes
Inline Side-by-side
Showing with 251 additions and 0 deletions
drivers/scsi/elx/libefc/efc_sm.c 0 → 100644
View file @ 5aa09c48
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2021 Broadcom. All Rights Reserved. The term
* “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
*/
/*
* Generic state machine framework.
*/
#include "efc.h"
#include "efc_sm.h"
/**
* efc_sm_post_event() - Post an event to a context.
*
* @ctx: State machine context
* @evt: Event to post
* @data: Event-specific data (if any)
*/
int
efc_sm_post_event(struct efc_sm_ctx *ctx,
enum efc_sm_event evt, void *data)
{
if (!ctx->current_state)
return -EIO;
ctx->current_state(ctx, evt, data);
return 0;
}
void
efc_sm_transition(struct efc_sm_ctx *ctx,
void (*state)(struct efc_sm_ctx *,
enum efc_sm_event, void *), void *data)
{
if (ctx->current_state == state) {
efc_sm_post_event(ctx, EFC_EVT_REENTER, data);
} else {
efc_sm_post_event(ctx, EFC_EVT_EXIT, data);
ctx->current_state = state;
efc_sm_post_event(ctx, EFC_EVT_ENTER, data);
}
}
static char *event_name[] = EFC_SM_EVENT_NAME;
const char *efc_sm_event_name(enum efc_sm_event evt)
{
if (evt > EFC_EVT_LAST)
return "unknown";
return event_name[evt];
}
drivers/scsi/elx/libefc/efc_sm.h 0 → 100644
View file @ 5aa09c48
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2021 Broadcom. All Rights Reserved. The term
* “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
*
*/
/**
* Generic state machine framework declarations.
*/
#ifndef _EFC_SM_H
#define _EFC_SM_H
struct efc_sm_ctx;
/* State Machine events */
enum efc_sm_event {
/* Common Events */
EFC_EVT_ENTER,
EFC_EVT_REENTER,
EFC_EVT_EXIT,
EFC_EVT_SHUTDOWN,
EFC_EVT_ALL_CHILD_NODES_FREE,
EFC_EVT_RESUME,
EFC_EVT_TIMER_EXPIRED,
/* Domain Events */
EFC_EVT_RESPONSE,
EFC_EVT_ERROR,
EFC_EVT_DOMAIN_FOUND,
EFC_EVT_DOMAIN_ALLOC_OK,
EFC_EVT_DOMAIN_ALLOC_FAIL,
EFC_EVT_DOMAIN_REQ_ATTACH,
EFC_EVT_DOMAIN_ATTACH_OK,
EFC_EVT_DOMAIN_ATTACH_FAIL,
EFC_EVT_DOMAIN_LOST,
EFC_EVT_DOMAIN_FREE_OK,
EFC_EVT_DOMAIN_FREE_FAIL,
EFC_EVT_HW_DOMAIN_REQ_ATTACH,
EFC_EVT_HW_DOMAIN_REQ_FREE,
/* Sport Events */
EFC_EVT_NPORT_ALLOC_OK,
EFC_EVT_NPORT_ALLOC_FAIL,
EFC_EVT_NPORT_ATTACH_OK,
EFC_EVT_NPORT_ATTACH_FAIL,
EFC_EVT_NPORT_FREE_OK,
EFC_EVT_NPORT_FREE_FAIL,
EFC_EVT_NPORT_TOPOLOGY_NOTIFY,
EFC_EVT_HW_PORT_ALLOC_OK,
EFC_EVT_HW_PORT_ALLOC_FAIL,
EFC_EVT_HW_PORT_ATTACH_OK,
EFC_EVT_HW_PORT_REQ_ATTACH,
EFC_EVT_HW_PORT_REQ_FREE,
EFC_EVT_HW_PORT_FREE_OK,
/* Login Events */
EFC_EVT_SRRS_ELS_REQ_OK,
EFC_EVT_SRRS_ELS_CMPL_OK,
EFC_EVT_SRRS_ELS_REQ_FAIL,
EFC_EVT_SRRS_ELS_CMPL_FAIL,
EFC_EVT_SRRS_ELS_REQ_RJT,
EFC_EVT_NODE_ATTACH_OK,
EFC_EVT_NODE_ATTACH_FAIL,
EFC_EVT_NODE_FREE_OK,
EFC_EVT_NODE_FREE_FAIL,
EFC_EVT_ELS_FRAME,
EFC_EVT_ELS_REQ_TIMEOUT,
EFC_EVT_ELS_REQ_ABORTED,
/* request an ELS IO be aborted */
EFC_EVT_ABORT_ELS,
/* ELS abort process complete */
EFC_EVT_ELS_ABORT_CMPL,
EFC_EVT_ABTS_RCVD,
/* node is not in the GID_PT payload */
EFC_EVT_NODE_MISSING,
/* node is allocated and in the GID_PT payload */
EFC_EVT_NODE_REFOUND,
/* node shutting down due to PLOGI recvd (implicit logo) */
EFC_EVT_SHUTDOWN_IMPLICIT_LOGO,
/* node shutting down due to LOGO recvd/sent (explicit logo) */
EFC_EVT_SHUTDOWN_EXPLICIT_LOGO,
EFC_EVT_PLOGI_RCVD,
EFC_EVT_FLOGI_RCVD,
EFC_EVT_LOGO_RCVD,
EFC_EVT_PRLI_RCVD,
EFC_EVT_PRLO_RCVD,
EFC_EVT_PDISC_RCVD,
EFC_EVT_FDISC_RCVD,
EFC_EVT_ADISC_RCVD,
EFC_EVT_RSCN_RCVD,
EFC_EVT_SCR_RCVD,
EFC_EVT_ELS_RCVD,
EFC_EVT_FCP_CMD_RCVD,
EFC_EVT_GIDPT_DELAY_EXPIRED,
/* SCSI Target Server events */
EFC_EVT_NODE_ACTIVE_IO_LIST_EMPTY,
EFC_EVT_NODE_DEL_INI_COMPLETE,
EFC_EVT_NODE_DEL_TGT_COMPLETE,
EFC_EVT_NODE_SESS_REG_OK,
EFC_EVT_NODE_SESS_REG_FAIL,
/* Must be last */
EFC_EVT_LAST
};
/* State Machine event name lookup array */
#define EFC_SM_EVENT_NAME { \
[EFC_EVT_ENTER] = "EFC_EVT_ENTER", \
[EFC_EVT_REENTER] = "EFC_EVT_REENTER", \
[EFC_EVT_EXIT] = "EFC_EVT_EXIT", \
[EFC_EVT_SHUTDOWN] = "EFC_EVT_SHUTDOWN", \
[EFC_EVT_ALL_CHILD_NODES_FREE] = "EFC_EVT_ALL_CHILD_NODES_FREE",\
[EFC_EVT_RESUME] = "EFC_EVT_RESUME", \
[EFC_EVT_TIMER_EXPIRED] = "EFC_EVT_TIMER_EXPIRED", \
[EFC_EVT_RESPONSE] = "EFC_EVT_RESPONSE", \
[EFC_EVT_ERROR] = "EFC_EVT_ERROR", \
[EFC_EVT_DOMAIN_FOUND] = "EFC_EVT_DOMAIN_FOUND", \
[EFC_EVT_DOMAIN_ALLOC_OK] = "EFC_EVT_DOMAIN_ALLOC_OK", \
[EFC_EVT_DOMAIN_ALLOC_FAIL] = "EFC_EVT_DOMAIN_ALLOC_FAIL", \
[EFC_EVT_DOMAIN_REQ_ATTACH] = "EFC_EVT_DOMAIN_REQ_ATTACH", \
[EFC_EVT_DOMAIN_ATTACH_OK] = "EFC_EVT_DOMAIN_ATTACH_OK", \
[EFC_EVT_DOMAIN_ATTACH_FAIL] = "EFC_EVT_DOMAIN_ATTACH_FAIL", \
[EFC_EVT_DOMAIN_LOST] = "EFC_EVT_DOMAIN_LOST", \
[EFC_EVT_DOMAIN_FREE_OK] = "EFC_EVT_DOMAIN_FREE_OK", \
[EFC_EVT_DOMAIN_FREE_FAIL] = "EFC_EVT_DOMAIN_FREE_FAIL", \
[EFC_EVT_HW_DOMAIN_REQ_ATTACH] = "EFC_EVT_HW_DOMAIN_REQ_ATTACH",\
[EFC_EVT_HW_DOMAIN_REQ_FREE] = "EFC_EVT_HW_DOMAIN_REQ_FREE", \
[EFC_EVT_NPORT_ALLOC_OK] = "EFC_EVT_NPORT_ALLOC_OK", \
[EFC_EVT_NPORT_ALLOC_FAIL] = "EFC_EVT_NPORT_ALLOC_FAIL", \
[EFC_EVT_NPORT_ATTACH_OK] = "EFC_EVT_NPORT_ATTACH_OK", \
[EFC_EVT_NPORT_ATTACH_FAIL] = "EFC_EVT_NPORT_ATTACH_FAIL", \
[EFC_EVT_NPORT_FREE_OK] = "EFC_EVT_NPORT_FREE_OK", \
[EFC_EVT_NPORT_FREE_FAIL] = "EFC_EVT_NPORT_FREE_FAIL", \
[EFC_EVT_NPORT_TOPOLOGY_NOTIFY] = "EFC_EVT_NPORT_TOPOLOGY_NOTIFY",\
[EFC_EVT_HW_PORT_ALLOC_OK] = "EFC_EVT_HW_PORT_ALLOC_OK", \
[EFC_EVT_HW_PORT_ALLOC_FAIL] = "EFC_EVT_HW_PORT_ALLOC_FAIL", \
[EFC_EVT_HW_PORT_ATTACH_OK] = "EFC_EVT_HW_PORT_ATTACH_OK", \
[EFC_EVT_HW_PORT_REQ_ATTACH] = "EFC_EVT_HW_PORT_REQ_ATTACH", \
[EFC_EVT_HW_PORT_REQ_FREE] = "EFC_EVT_HW_PORT_REQ_FREE", \
[EFC_EVT_HW_PORT_FREE_OK] = "EFC_EVT_HW_PORT_FREE_OK", \
[EFC_EVT_SRRS_ELS_REQ_OK] = "EFC_EVT_SRRS_ELS_REQ_OK", \
[EFC_EVT_SRRS_ELS_CMPL_OK] = "EFC_EVT_SRRS_ELS_CMPL_OK", \
[EFC_EVT_SRRS_ELS_REQ_FAIL] = "EFC_EVT_SRRS_ELS_REQ_FAIL", \
[EFC_EVT_SRRS_ELS_CMPL_FAIL] = "EFC_EVT_SRRS_ELS_CMPL_FAIL", \
[EFC_EVT_SRRS_ELS_REQ_RJT] = "EFC_EVT_SRRS_ELS_REQ_RJT", \
[EFC_EVT_NODE_ATTACH_OK] = "EFC_EVT_NODE_ATTACH_OK", \
[EFC_EVT_NODE_ATTACH_FAIL] = "EFC_EVT_NODE_ATTACH_FAIL", \
[EFC_EVT_NODE_FREE_OK] = "EFC_EVT_NODE_FREE_OK", \
[EFC_EVT_NODE_FREE_FAIL] = "EFC_EVT_NODE_FREE_FAIL", \
[EFC_EVT_ELS_FRAME] = "EFC_EVT_ELS_FRAME", \
[EFC_EVT_ELS_REQ_TIMEOUT] = "EFC_EVT_ELS_REQ_TIMEOUT", \
[EFC_EVT_ELS_REQ_ABORTED] = "EFC_EVT_ELS_REQ_ABORTED", \
[EFC_EVT_ABORT_ELS] = "EFC_EVT_ABORT_ELS", \
[EFC_EVT_ELS_ABORT_CMPL] = "EFC_EVT_ELS_ABORT_CMPL", \
[EFC_EVT_ABTS_RCVD] = "EFC_EVT_ABTS_RCVD", \
[EFC_EVT_NODE_MISSING] = "EFC_EVT_NODE_MISSING", \
[EFC_EVT_NODE_REFOUND] = "EFC_EVT_NODE_REFOUND", \
[EFC_EVT_SHUTDOWN_IMPLICIT_LOGO] = "EFC_EVT_SHUTDOWN_IMPLICIT_LOGO",\
[EFC_EVT_SHUTDOWN_EXPLICIT_LOGO] = "EFC_EVT_SHUTDOWN_EXPLICIT_LOGO",\
[EFC_EVT_PLOGI_RCVD] = "EFC_EVT_PLOGI_RCVD", \
[EFC_EVT_FLOGI_RCVD] = "EFC_EVT_FLOGI_RCVD", \
[EFC_EVT_LOGO_RCVD] = "EFC_EVT_LOGO_RCVD", \
[EFC_EVT_PRLI_RCVD] = "EFC_EVT_PRLI_RCVD", \
[EFC_EVT_PRLO_RCVD] = "EFC_EVT_PRLO_RCVD", \
[EFC_EVT_PDISC_RCVD] = "EFC_EVT_PDISC_RCVD", \
[EFC_EVT_FDISC_RCVD] = "EFC_EVT_FDISC_RCVD", \
[EFC_EVT_ADISC_RCVD] = "EFC_EVT_ADISC_RCVD", \
[EFC_EVT_RSCN_RCVD] = "EFC_EVT_RSCN_RCVD", \
[EFC_EVT_SCR_RCVD] = "EFC_EVT_SCR_RCVD", \
[EFC_EVT_ELS_RCVD] = "EFC_EVT_ELS_RCVD", \
[EFC_EVT_FCP_CMD_RCVD] = "EFC_EVT_FCP_CMD_RCVD", \
[EFC_EVT_NODE_DEL_INI_COMPLETE] = "EFC_EVT_NODE_DEL_INI_COMPLETE",\
[EFC_EVT_NODE_DEL_TGT_COMPLETE] = "EFC_EVT_NODE_DEL_TGT_COMPLETE",\
[EFC_EVT_LAST] = "EFC_EVT_LAST", \
}
int
efc_sm_post_event(struct efc_sm_ctx *ctx,
enum efc_sm_event evt, void *data);
void
efc_sm_transition(struct efc_sm_ctx *ctx,
void (*state)(struct efc_sm_ctx *ctx,
enum efc_sm_event evt, void *arg),
void *data);
void efc_sm_disable(struct efc_sm_ctx *ctx);
const char *efc_sm_event_name(enum efc_sm_event evt);
#endif /* ! _EFC_SM_H */
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7