1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (c) 2020-2021, The Linux Foundation. All rights reserved. 4 */ 5 6 #ifndef MSM_DISP_SNAPSHOT_H_ 7 #define MSM_DISP_SNAPSHOT_H_ 8 9 #include <drm/drm_atomic_helper.h> 10 #include <drm/drm_device.h> 11 #include "../../../drm_crtc_internal.h" 12 #include <drm/drm_print.h> 13 #include <drm/drm_atomic.h> 14 #include <linux/debugfs.h> 15 #include <linux/list.h> 16 #include <linux/delay.h> 17 #include <linux/spinlock.h> 18 #include <linux/ktime.h> 19 #include <linux/uaccess.h> 20 #include <linux/dma-buf.h> 21 #include <linux/slab.h> 22 #include <linux/list_sort.h> 23 #include <linux/pm.h> 24 #include <linux/pm_runtime.h> 25 #include <linux/kthread.h> 26 #include <linux/devcoredump.h> 27 #include <stdarg.h> 28 #include "msm_kms.h" 29 30 #define MSM_DISP_SNAPSHOT_MAX_BLKS 10 31 32 /* debug option to print the registers in logs */ 33 #define MSM_DISP_SNAPSHOT_DUMP_IN_CONSOLE 0 34 35 /* print debug ranges in groups of 4 u32s */ 36 #define REG_DUMP_ALIGN 16 37 38 /** 39 * struct msm_disp_state - structure to store current dpu state 40 * @dev: device pointer 41 * @drm_dev: drm device pointer 42 * @atomic_state: atomic state duplicated at the time of the error 43 * @timestamp: timestamp at which the coredump was captured 44 */ 45 struct msm_disp_state { 46 struct device *dev; 47 struct drm_device *drm_dev; 48 49 struct list_head blocks; 50 51 struct drm_atomic_state *atomic_state; 52 53 ktime_t timestamp; 54 }; 55 56 /** 57 * struct msm_disp_state_block - structure to store each hardware block state 58 * @name: name of the block 59 * @drm_dev: handle to the linked list head 60 * @size: size of the register space of this hardware block 61 * @state: array holding the register dump of this hardware block 62 * @base_addr: starting address of this hardware block's register space 63 */ 64 struct msm_disp_state_block { 65 char name[SZ_128]; 66 struct list_head node; 67 unsigned int size; 68 u32 *state; 69 void __iomem *base_addr; 70 }; 71 72 /** 73 * msm_disp_snapshot_init - initialize display snapshot 74 * @drm_dev: drm device handle 75 * 76 * Returns: 0 or -ERROR 77 */ 78 int msm_disp_snapshot_init(struct drm_device *drm_dev); 79 80 /** 81 * msm_disp_snapshot_destroy - destroy the display snapshot 82 * @drm_dev: drm device handle 83 * 84 * Returns: none 85 */ 86 void msm_disp_snapshot_destroy(struct drm_device *drm_dev); 87 88 /** 89 * msm_disp_snapshot_state - trigger to dump the display snapshot 90 * @drm_dev: handle to drm device 91 92 * Returns: none 93 */ 94 void msm_disp_snapshot_state(struct drm_device *drm_dev); 95 96 /** 97 * msm_disp_state_print - print out the current dpu state 98 * @disp_state: handle to drm device 99 * @p: handle to drm printer 100 * 101 * Returns: none 102 */ 103 void msm_disp_state_print(struct msm_disp_state *disp_state, struct drm_printer *p); 104 105 /** 106 * msm_disp_snapshot_capture_state - utility to capture atomic state and hw registers 107 * @disp_state: handle to msm_disp_state struct 108 109 * Returns: none 110 */ 111 void msm_disp_snapshot_capture_state(struct msm_disp_state *disp_state); 112 113 /** 114 * msm_disp_state_free - free the memory after the coredump has been read 115 * @data: handle to struct msm_disp_state 116 117 * Returns: none 118 */ 119 void msm_disp_state_free(void *data); 120 121 /** 122 * msm_disp_snapshot_add_block - add a hardware block with its register dump 123 * @disp_state: handle to struct msm_disp_state 124 * @name: name of the hardware block 125 * @len: size of the register space of the hardware block 126 * @base_addr: starting address of the register space of the hardware block 127 * @fmt: format in which the block names need to be printed 128 * 129 * Returns: none 130 */ 131 __printf(4, 5) 132 void msm_disp_snapshot_add_block(struct msm_disp_state *disp_state, u32 len, 133 void __iomem *base_addr, const char *fmt, ...); 134 135 #endif /* MSM_DISP_SNAPSHOT_H_ */ 136