1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2010 Google, Inc. 4 * Author: Erik Gilling <konkers@android.com> 5 * 6 * Copyright (C) 2011-2013 NVIDIA Corporation 7 */ 8 9 #include <linux/debugfs.h> 10 #include <linux/seq_file.h> 11 #include <linux/uaccess.h> 12 13 #include <linux/io.h> 14 15 #include "dev.h" 16 #include "debug.h" 17 #include "channel.h" 18 19 static DEFINE_MUTEX(debug_lock); 20 21 unsigned int host1x_debug_trace_cmdbuf; 22 23 static pid_t host1x_debug_force_timeout_pid; 24 static u32 host1x_debug_force_timeout_val; 25 static u32 host1x_debug_force_timeout_channel; 26 27 void host1x_debug_output(struct output *o, const char *fmt, ...) 28 { 29 va_list args; 30 int len; 31 32 va_start(args, fmt); 33 len = vsnprintf(o->buf, sizeof(o->buf), fmt, args); 34 va_end(args); 35 36 o->fn(o->ctx, o->buf, len, false); 37 } 38 39 void host1x_debug_cont(struct output *o, const char *fmt, ...) 40 { 41 va_list args; 42 int len; 43 44 va_start(args, fmt); 45 len = vsnprintf(o->buf, sizeof(o->buf), fmt, args); 46 va_end(args); 47 48 o->fn(o->ctx, o->buf, len, true); 49 } 50 51 static int show_channel(struct host1x_channel *ch, void *data, bool show_fifo) 52 { 53 struct host1x *m = dev_get_drvdata(ch->dev->parent); 54 struct output *o = data; 55 56 mutex_lock(&ch->cdma.lock); 57 mutex_lock(&debug_lock); 58 59 if (show_fifo) 60 host1x_hw_show_channel_fifo(m, ch, o); 61 62 host1x_hw_show_channel_cdma(m, ch, o); 63 64 mutex_unlock(&debug_lock); 65 mutex_unlock(&ch->cdma.lock); 66 67 return 0; 68 } 69 70 static void show_syncpts(struct host1x *m, struct output *o) 71 { 72 struct list_head *pos; 73 unsigned int i; 74 75 host1x_debug_output(o, "---- syncpts ----\n"); 76 77 for (i = 0; i < host1x_syncpt_nb_pts(m); i++) { 78 u32 max = host1x_syncpt_read_max(m->syncpt + i); 79 u32 min = host1x_syncpt_load(m->syncpt + i); 80 unsigned int waiters = 0; 81 82 spin_lock(&m->syncpt[i].intr.lock); 83 list_for_each(pos, &m->syncpt[i].intr.wait_head) 84 waiters++; 85 spin_unlock(&m->syncpt[i].intr.lock); 86 87 if (!min && !max && !waiters) 88 continue; 89 90 host1x_debug_output(o, 91 "id %u (%s) min %d max %d (%d waiters)\n", 92 i, m->syncpt[i].name, min, max, waiters); 93 } 94 95 for (i = 0; i < host1x_syncpt_nb_bases(m); i++) { 96 u32 base_val; 97 98 base_val = host1x_syncpt_load_wait_base(m->syncpt + i); 99 if (base_val) 100 host1x_debug_output(o, "waitbase id %u val %d\n", i, 101 base_val); 102 } 103 104 host1x_debug_output(o, "\n"); 105 } 106 107 static void show_all(struct host1x *m, struct output *o, bool show_fifo) 108 { 109 unsigned int i; 110 111 host1x_hw_show_mlocks(m, o); 112 show_syncpts(m, o); 113 host1x_debug_output(o, "---- channels ----\n"); 114 115 for (i = 0; i < m->info->nb_channels; ++i) { 116 struct host1x_channel *ch = host1x_channel_get_index(m, i); 117 118 if (ch) { 119 show_channel(ch, o, show_fifo); 120 host1x_channel_put(ch); 121 } 122 } 123 } 124 125 static int host1x_debug_show_all(struct seq_file *s, void *unused) 126 { 127 struct output o = { 128 .fn = write_to_seqfile, 129 .ctx = s 130 }; 131 132 show_all(s->private, &o, true); 133 134 return 0; 135 } 136 137 static int host1x_debug_show(struct seq_file *s, void *unused) 138 { 139 struct output o = { 140 .fn = write_to_seqfile, 141 .ctx = s 142 }; 143 144 show_all(s->private, &o, false); 145 146 return 0; 147 } 148 149 static int host1x_debug_open_all(struct inode *inode, struct file *file) 150 { 151 return single_open(file, host1x_debug_show_all, inode->i_private); 152 } 153 154 static const struct file_operations host1x_debug_all_fops = { 155 .open = host1x_debug_open_all, 156 .read = seq_read, 157 .llseek = seq_lseek, 158 .release = single_release, 159 }; 160 161 static int host1x_debug_open(struct inode *inode, struct file *file) 162 { 163 return single_open(file, host1x_debug_show, inode->i_private); 164 } 165 166 static const struct file_operations host1x_debug_fops = { 167 .open = host1x_debug_open, 168 .read = seq_read, 169 .llseek = seq_lseek, 170 .release = single_release, 171 }; 172 173 static void host1x_debugfs_init(struct host1x *host1x) 174 { 175 struct dentry *de = debugfs_create_dir("tegra-host1x", NULL); 176 177 /* Store the created entry */ 178 host1x->debugfs = de; 179 180 debugfs_create_file("status", S_IRUGO, de, host1x, &host1x_debug_fops); 181 debugfs_create_file("status_all", S_IRUGO, de, host1x, 182 &host1x_debug_all_fops); 183 184 debugfs_create_u32("trace_cmdbuf", S_IRUGO|S_IWUSR, de, 185 &host1x_debug_trace_cmdbuf); 186 187 host1x_hw_debug_init(host1x, de); 188 189 debugfs_create_u32("force_timeout_pid", S_IRUGO|S_IWUSR, de, 190 &host1x_debug_force_timeout_pid); 191 debugfs_create_u32("force_timeout_val", S_IRUGO|S_IWUSR, de, 192 &host1x_debug_force_timeout_val); 193 debugfs_create_u32("force_timeout_channel", S_IRUGO|S_IWUSR, de, 194 &host1x_debug_force_timeout_channel); 195 } 196 197 static void host1x_debugfs_exit(struct host1x *host1x) 198 { 199 debugfs_remove_recursive(host1x->debugfs); 200 } 201 202 void host1x_debug_init(struct host1x *host1x) 203 { 204 if (IS_ENABLED(CONFIG_DEBUG_FS)) 205 host1x_debugfs_init(host1x); 206 } 207 208 void host1x_debug_deinit(struct host1x *host1x) 209 { 210 if (IS_ENABLED(CONFIG_DEBUG_FS)) 211 host1x_debugfs_exit(host1x); 212 } 213 214 void host1x_debug_dump(struct host1x *host1x) 215 { 216 struct output o = { 217 .fn = write_to_printk 218 }; 219 220 show_all(host1x, &o, true); 221 } 222 223 void host1x_debug_dump_syncpts(struct host1x *host1x) 224 { 225 struct output o = { 226 .fn = write_to_printk 227 }; 228 229 show_syncpts(host1x, &o); 230 } 231