1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2020-2023 Intel Corporation 4 */ 5 6 #include <linux/ctype.h> 7 #include <linux/highmem.h> 8 #include <linux/fs.h> 9 #include <linux/slab.h> 10 #include <linux/moduleparam.h> 11 12 #include "vpu_boot_api.h" 13 #include "ivpu_drv.h" 14 #include "ivpu_fw.h" 15 #include "ivpu_fw_log.h" 16 #include "ivpu_gem.h" 17 18 #define IVPU_FW_LOG_LINE_LENGTH 256 19 20 unsigned int ivpu_log_level = IVPU_FW_LOG_ERROR; 21 module_param(ivpu_log_level, uint, 0444); 22 MODULE_PARM_DESC(ivpu_log_level, 23 "VPU firmware default trace level: debug=" __stringify(IVPU_FW_LOG_DEBUG) 24 " info=" __stringify(IVPU_FW_LOG_INFO) 25 " warn=" __stringify(IVPU_FW_LOG_WARN) 26 " error=" __stringify(IVPU_FW_LOG_ERROR) 27 " fatal=" __stringify(IVPU_FW_LOG_FATAL)); 28 29 static int fw_log_ptr(struct ivpu_device *vdev, struct ivpu_bo *bo, u32 *offset, 30 struct vpu_tracing_buffer_header **log_header) 31 { 32 struct vpu_tracing_buffer_header *log; 33 34 if ((*offset + sizeof(*log)) > bo->base.size) 35 return -EINVAL; 36 37 log = bo->kvaddr + *offset; 38 39 if (log->vpu_canary_start != VPU_TRACING_BUFFER_CANARY) 40 return -EINVAL; 41 42 if (log->header_size < sizeof(*log) || log->header_size > 1024) { 43 ivpu_dbg(vdev, FW_BOOT, "Invalid header size 0x%x\n", log->header_size); 44 return -EINVAL; 45 } 46 if ((char *)log + log->size > (char *)bo->kvaddr + bo->base.size) { 47 ivpu_dbg(vdev, FW_BOOT, "Invalid log size 0x%x\n", log->size); 48 return -EINVAL; 49 } 50 51 *log_header = log; 52 *offset += log->size; 53 54 ivpu_dbg(vdev, FW_BOOT, 55 "FW log name \"%s\", write offset 0x%x size 0x%x, wrap count %d, hdr version %d size %d format %d, alignment %d", 56 log->name, log->write_index, log->size, log->wrap_count, log->header_version, 57 log->header_size, log->format, log->alignment); 58 59 return 0; 60 } 61 62 static void buffer_print(char *buffer, u32 size, struct drm_printer *p) 63 { 64 char line[IVPU_FW_LOG_LINE_LENGTH]; 65 u32 index = 0; 66 67 if (!size || !buffer) 68 return; 69 70 while (size--) { 71 if (*buffer == '\n' || *buffer == 0) { 72 line[index] = 0; 73 if (index != 0) 74 drm_printf(p, "%s\n", line); 75 index = 0; 76 buffer++; 77 continue; 78 } 79 if (index == IVPU_FW_LOG_LINE_LENGTH - 1) { 80 line[index] = 0; 81 index = 0; 82 drm_printf(p, "%s\n", line); 83 } 84 if (*buffer != '\r' && (isprint(*buffer) || iscntrl(*buffer))) 85 line[index++] = *buffer; 86 buffer++; 87 } 88 line[index] = 0; 89 if (index != 0) 90 drm_printf(p, "%s\n", line); 91 } 92 93 static void fw_log_print_buffer(struct ivpu_device *vdev, struct vpu_tracing_buffer_header *log, 94 const char *prefix, bool only_new_msgs, struct drm_printer *p) 95 { 96 char *log_buffer = (void *)log + log->header_size; 97 u32 log_size = log->size - log->header_size; 98 u32 log_start = log->read_index; 99 u32 log_end = log->write_index; 100 101 if (!(log->write_index || log->wrap_count) || 102 (log->write_index == log->read_index && only_new_msgs)) { 103 drm_printf(p, "==== %s \"%s\" log empty ====\n", prefix, log->name); 104 return; 105 } 106 107 drm_printf(p, "==== %s \"%s\" log start ====\n", prefix, log->name); 108 if (log->write_index > log->read_index) { 109 buffer_print(log_buffer + log_start, log_end - log_start, p); 110 } else { 111 buffer_print(log_buffer + log_end, log_size - log_end, p); 112 buffer_print(log_buffer, log_end, p); 113 } 114 drm_printf(p, "\x1b[0m"); 115 drm_printf(p, "==== %s \"%s\" log end ====\n", prefix, log->name); 116 } 117 118 void ivpu_fw_log_print(struct ivpu_device *vdev, bool only_new_msgs, struct drm_printer *p) 119 { 120 struct vpu_tracing_buffer_header *log_header; 121 u32 next = 0; 122 123 while (fw_log_ptr(vdev, vdev->fw->mem_log_crit, &next, &log_header) == 0) 124 fw_log_print_buffer(vdev, log_header, "VPU critical", only_new_msgs, p); 125 126 next = 0; 127 while (fw_log_ptr(vdev, vdev->fw->mem_log_verb, &next, &log_header) == 0) 128 fw_log_print_buffer(vdev, log_header, "VPU verbose", only_new_msgs, p); 129 } 130 131 void ivpu_fw_log_clear(struct ivpu_device *vdev) 132 { 133 struct vpu_tracing_buffer_header *log_header; 134 u32 next = 0; 135 136 while (fw_log_ptr(vdev, vdev->fw->mem_log_crit, &next, &log_header) == 0) 137 log_header->read_index = log_header->write_index; 138 139 next = 0; 140 while (fw_log_ptr(vdev, vdev->fw->mem_log_verb, &next, &log_header) == 0) 141 log_header->read_index = log_header->write_index; 142 } 143