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platform: dce: reworked dce FSM design

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Redesign DCE KMD drive state machine to handle new PM events.

Bug 3583331

Change-Id: I89adcfa2f311a9a1e86b70e14821468203365266
Signed-off-by: Mahesh Kumar <mahkumar@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2673665
Reviewed-by: svc_kernel_abi <svc_kernel_abi@nvidia.com>
Reviewed-by: Arun Swain <arswain@nvidia.com>
GVS: Gerrit_Virtual_Submit
This commit is contained in:
Mahesh Kumar
2022-02-18 03:39:30 +05:30
committed by Laxman Dewangan
parent a6cc70f8d5
commit 28a1cfd1c1
15 changed files with 1081 additions and 425 deletions
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103
drivers/platform/tegra/dce/include/dce-fsm.h Normal file
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/*
* Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*/
#ifndef DCE_FSM_H
#define DCE_FSM_H
#include <dce-cond.h>
#include <dce-lock.h>
/**
* enum dce_fsm_event_id_type - IDs to be used to convey various
* events throughout the life cycle of dce.
*/
enum dce_fsm_event_id_type {
EVENT_ID_DCE_INVALID = -1,
EVENT_ID_DCE_FSM_START = 0,
EVENT_ID_DCE_BOOT_COMPLETE_REQUESTED,
EVENT_ID_DCE_BOOT_COMPLETE_RECEIVED,
EVENT_ID_DCE_BOOT_CMD_MSG_REQUESTED,
EVENT_ID_DCE_BOOT_CMD_MSG_RECEIVED,
EVENT_ID_DCE_ADMIN_IPC_MSG_REQUESTED,
EVENT_ID_DCE_ADMIN_IPC_MSG_RECEIVED,
EVENT_ID_DCE_SC7_ENTER_REQUESTED,
EVENT_ID_DCE_SC7_ENTERED_RECEIVED,
EVENT_ID_DCE_LOG_REQUESTED,
EVENT_ID_DCE_LOG_READY_RECEIVED,
EVENT_ID_DCE_ABORT_RECEIVED,
EVENT_ID_DCE_CRASH_LOG_RECEIVED,
EVENT_ID_DCE_LOG_OVERFLOW_RECEIVED,
EVENT_ID_DCE_FSM_STOP,
};
/**
* dce_fsm_state - Different states of dce.
*/
enum dce_fsm_state {
STATE_DCE_INVALID = -1,
STATE_DCE_FSM_IDLE = 0,
STATE_DCE_BOOT_WAIT,
STATE_DCE_BOOTCMD_WFI,
STATE_DCE_ADMIN_WFI,
STATE_DCE_SC7_ENTER_WFI,
STATE_DCE_SC7_ENTERED,
STATE_DCE_LOG_READY_WFI,
STATE_DCE_ABORT,
};
/**
* struct dce_fsm_info - contains info used by FSM
* @d : Pointer to tegra_dce struct
* @initialized : If FSM is initialized
* @c_state : Current state of FSM
* @lock : Mutex to protect FSM operations
* @requested_ipcs : Indicate what IPCs/requests are currently running.
* In case we support more than one FSM request at a time.
*/
struct dce_fsm_info {
struct tegra_dce *d;
bool initialized;
enum dce_fsm_state c_state;
struct dce_mutex lock;
u32 requested_ipcs;
};
/**
* struct dce_mailbox_send_cmd_params - contains params for callback function
* @cmd : u32 command to be send
* @interface : interface id on which command need to be sent
*/
struct dce_mailbox_send_cmd_params {
u32 cmd;
u32 interface;
};
/**
* struct dce_admin_send_msg_params - contains params for callback function
* @msg : Pointer to dce_ipc_msg
*/
struct dce_admin_send_msg_params {
struct dce_ipc_message *msg;
};
int dce_fsm_init(struct tegra_dce *d);
void dce_fsm_start(struct tegra_dce *d);
void dce_fsm_stop(struct tegra_dce *d);
void dce_fsm_deinit(struct tegra_dce *d);
int dce_fsm_post_event(struct tegra_dce *d,
enum dce_fsm_event_id_type event,
void *data);
int dce_handle_fsm_start_event(struct tegra_dce *d, void *params);
int dce_handle_event_stub(struct tegra_dce *d, void *params);
#endif