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 "msm_kms.h" 28 29 #define MSM_DISP_SNAPSHOT_MAX_BLKS 10 30 31 /* debug option to print the registers in logs */ 32 #define MSM_DISP_SNAPSHOT_DUMP_IN_CONSOLE 0 33 34 /* print debug ranges in groups of 4 u32s */ 35 #define REG_DUMP_ALIGN 16 36 37 /** 38 * struct msm_disp_state - structure to store current dpu state 39 * @dev: device pointer 40 * @drm_dev: drm device pointer 41 * @atomic_state: atomic state duplicated at the time of the error 42 * @time: timestamp at which the coredump was captured 43 */ 44 struct msm_disp_state { 45 struct device *dev; 46 struct drm_device *drm_dev; 47 48 struct list_head blocks; 49 50 struct drm_atomic_state *atomic_state; 51 52 struct timespec64 time; 53 }; 54 55 /** 56 * struct msm_disp_state_block - structure to store each hardware block state 57 * @name: name of the block 58 * @drm_dev: handle to the linked list head 59 * @size: size of the register space of this hardware block 60 * @state: array holding the register dump of this hardware block 61 * @base_addr: starting address of this hardware block's register space 62 */ 63 struct msm_disp_state_block { 64 char name[SZ_128]; 65 struct list_head node; 66 unsigned int size; 67 u32 *state; 68 void __iomem *base_addr; 69 }; 70 71 /** 72 * msm_disp_snapshot_init - initialize display snapshot 73 * @drm_dev: drm device handle 74 * 75 * Returns: 0 or -ERROR 76 */ 77 int msm_disp_snapshot_init(struct drm_device *drm_dev); 78 79 /** 80 * msm_disp_snapshot_destroy - destroy the display snapshot 81 * @drm_dev: drm device handle 82 * 83 * Returns: none 84 */ 85 void msm_disp_snapshot_destroy(struct drm_device *drm_dev); 86 87 /** 88 * msm_disp_snapshot_state_sync - synchronously snapshot display state 89 * @kms: the kms object 90 * 91 * Returns state or error 92 * 93 * Must be called with &kms->dump_mutex held 94 */ 95 struct msm_disp_state *msm_disp_snapshot_state_sync(struct msm_kms *kms); 96 97 /** 98 * msm_disp_snapshot_state - trigger to dump the display snapshot 99 * @drm_dev: handle to drm device 100 101 * Returns: none 102 */ 103 void msm_disp_snapshot_state(struct drm_device *drm_dev); 104 105 /** 106 * msm_disp_state_print - print out the current dpu state 107 * @disp_state: handle to drm device 108 * @p: handle to drm printer 109 * 110 * Returns: none 111 */ 112 void msm_disp_state_print(struct msm_disp_state *disp_state, struct drm_printer *p); 113 114 /** 115 * msm_disp_snapshot_capture_state - utility to capture atomic state and hw registers 116 * @disp_state: handle to msm_disp_state struct 117 118 * Returns: none 119 */ 120 void msm_disp_snapshot_capture_state(struct msm_disp_state *disp_state); 121 122 /** 123 * msm_disp_state_free - free the memory after the coredump has been read 124 * @data: handle to struct msm_disp_state 125 126 * Returns: none 127 */ 128 void msm_disp_state_free(void *data); 129 130 /** 131 * msm_disp_snapshot_add_block - add a hardware block with its register dump 132 * @disp_state: handle to struct msm_disp_state 133 * @name: name of the hardware block 134 * @len: size of the register space of the hardware block 135 * @base_addr: starting address of the register space of the hardware block 136 * @fmt: format in which the block names need to be printed 137 * 138 * Returns: none 139 */ 140 __printf(4, 5) 141 void msm_disp_snapshot_add_block(struct msm_disp_state *disp_state, u32 len, 142 void __iomem *base_addr, const char *fmt, ...); 143 144 #endif /* MSM_DISP_SNAPSHOT_H_ */ 145