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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2020-2021, The Linux Foundation. All rights reserved.
*/
#ifndef MSM_DISP_SNAPSHOT_H_
#define MSM_DISP_SNAPSHOT_H_
#include <drm/drm_atomic_helper.h>
#include <drm/drm_device.h>
#include "../../../drm_crtc_internal.h"
#include <drm/drm_print.h>
#include <drm/drm_atomic.h>
#include <linux/debugfs.h>
#include <linux/list.h>
#include <linux/delay.h>
#include <linux/spinlock.h>
#include <linux/ktime.h>
#include <linux/uaccess.h>
#include <linux/dma-buf.h>
#include <linux/slab.h>
#include <linux/list_sort.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/kthread.h>
#include <linux/devcoredump.h>
#include "msm_kms.h"
#define MSM_DISP_SNAPSHOT_MAX_BLKS 10
/* debug option to print the registers in logs */
#define MSM_DISP_SNAPSHOT_DUMP_IN_CONSOLE 0
/* print debug ranges in groups of 4 u32s */
#define REG_DUMP_ALIGN 16
/**
* struct msm_disp_state - structure to store current dpu state
* @dev: device pointer
* @drm_dev: drm device pointer
* @atomic_state: atomic state duplicated at the time of the error
* @time: timestamp at which the coredump was captured
*/
struct msm_disp_state {
struct device *dev;
struct drm_device *drm_dev;
struct list_head blocks;
struct drm_atomic_state *atomic_state;
struct timespec64 time;
};
/**
* struct msm_disp_state_block - structure to store each hardware block state
* @name: name of the block
* @drm_dev: handle to the linked list head
* @size: size of the register space of this hardware block
* @state: array holding the register dump of this hardware block
* @base_addr: starting address of this hardware block's register space
*/
struct msm_disp_state_block {
char name[SZ_128];
struct list_head node;
unsigned int size;
u32 *state;
void __iomem *base_addr;
};
/**
* msm_disp_snapshot_init - initialize display snapshot
* @drm_dev: drm device handle
*
* Returns: 0 or -ERROR
*/
int msm_disp_snapshot_init(struct drm_device *drm_dev);
/**
* msm_disp_snapshot_destroy - destroy the display snapshot
* @drm_dev: drm device handle
*
* Returns: none
*/
void msm_disp_snapshot_destroy(struct drm_device *drm_dev);
/**
* msm_disp_snapshot_state_sync - synchronously snapshot display state
* @kms: the kms object
*
* Returns state or error
*
* Must be called with &kms->dump_mutex held
*/
struct msm_disp_state *msm_disp_snapshot_state_sync(struct msm_kms *kms);
/**
* msm_disp_snapshot_state - trigger to dump the display snapshot
* @drm_dev: handle to drm device
* Returns: none
*/
void msm_disp_snapshot_state(struct drm_device *drm_dev);
/**
* msm_disp_state_print - print out the current dpu state
* @disp_state: handle to drm device
* @p: handle to drm printer
*
* Returns: none
*/
void msm_disp_state_print(struct msm_disp_state *disp_state, struct drm_printer *p);
/**
* msm_disp_snapshot_capture_state - utility to capture atomic state and hw registers
* @disp_state: handle to msm_disp_state struct
* Returns: none
*/
void msm_disp_snapshot_capture_state(struct msm_disp_state *disp_state);
/**
* msm_disp_state_free - free the memory after the coredump has been read
* @data: handle to struct msm_disp_state
* Returns: none
*/
void msm_disp_state_free(void *data);
/**
* msm_disp_snapshot_add_block - add a hardware block with its register dump
* @disp_state: handle to struct msm_disp_state
* @name: name of the hardware block
* @len: size of the register space of the hardware block
* @base_addr: starting address of the register space of the hardware block
* @fmt: format in which the block names need to be printed
*
* Returns: none
*/
__printf(4, 5)
void msm_disp_snapshot_add_block(struct msm_disp_state *disp_state, u32 len,
void __iomem *base_addr, const char *fmt, ...);
#endif /* MSM_DISP_SNAPSHOT_H_ */
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