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
20unsigned int ivpu_log_level = IVPU_FW_LOG_ERROR;
21module_param(ivpu_log_level, uint, 0444);
22MODULE_PARM_DESC(ivpu_log_level,
23 "NPU 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
29static 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)) > ivpu_bo_size(bo))
35 return -EINVAL;
36
37 log = ivpu_bo_vaddr(bo) + *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 *)ivpu_bo_vaddr(bo) + ivpu_bo_size(bo)) {
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
62static 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, f: "%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, f: "%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, f: "%s\n", line);
91}
92
93static 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, f: "==== %s \"%s\" log empty ====\n", prefix, log->name);
104 return;
105 }
106
107 drm_printf(p, f: "==== %s \"%s\" log start ====\n", prefix, log->name);
108 if (log->write_index > log->read_index) {
109 buffer_print(buffer: log_buffer + log_start, size: log_end - log_start, p);
110 } else {
111 buffer_print(buffer: log_buffer + log_end, size: log_size - log_end, p);
112 buffer_print(buffer: log_buffer, size: log_end, p);
113 }
114 drm_printf(p, f: "\x1b[0m");
115 drm_printf(p, f: "==== %s \"%s\" log end ====\n", prefix, log->name);
116}
117
118void 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, bo: vdev->fw->mem_log_crit, offset: &next, log_header: &log_header) == 0)
124 fw_log_print_buffer(vdev, log: log_header, prefix: "NPU critical", only_new_msgs, p);
125
126 next = 0;
127 while (fw_log_ptr(vdev, bo: vdev->fw->mem_log_verb, offset: &next, log_header: &log_header) == 0)
128 fw_log_print_buffer(vdev, log: log_header, prefix: "NPU verbose", only_new_msgs, p);
129}
130
131void 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, bo: vdev->fw->mem_log_crit, offset: &next, log_header: &log_header) == 0)
137 log_header->read_index = log_header->write_index;
138
139 next = 0;
140 while (fw_log_ptr(vdev, bo: vdev->fw->mem_log_verb, offset: &next, log_header: &log_header) == 0)
141 log_header->read_index = log_header->write_index;
142}
143

source code of linux/drivers/accel/ivpu/ivpu_fw_log.c