1 /* 2 * Copyright (C) 2010 Google, Inc. 3 * Author: Erik Gilling <konkers@android.com> 4 * 5 * Copyright (C) 2011-2013 NVIDIA Corporation 6 * 7 * This software is licensed under the terms of the GNU General Public 8 * License version 2, as published by the Free Software Foundation, and 9 * may be copied, distributed, and modified under those terms. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 */ 17 18 #include <linux/debugfs.h> 19 #include <linux/seq_file.h> 20 #include <linux/uaccess.h> 21 22 #include <linux/io.h> 23 24 #include "dev.h" 25 #include "debug.h" 26 #include "channel.h" 27 28 unsigned int host1x_debug_trace_cmdbuf; 29 30 static pid_t host1x_debug_force_timeout_pid; 31 static u32 host1x_debug_force_timeout_val; 32 static u32 host1x_debug_force_timeout_channel; 33 34 void host1x_debug_output(struct output *o, const char *fmt, ...) 35 { 36 va_list args; 37 int len; 38 39 va_start(args, fmt); 40 len = vsnprintf(o->buf, sizeof(o->buf), fmt, args); 41 va_end(args); 42 43 o->fn(o->ctx, o->buf, len); 44 } 45 46 static int show_channel(struct host1x_channel *ch, void *data, bool show_fifo) 47 { 48 struct host1x *m = dev_get_drvdata(ch->dev->parent); 49 struct output *o = data; 50 51 mutex_lock(&ch->cdma.lock); 52 53 if (show_fifo) 54 host1x_hw_show_channel_fifo(m, ch, o); 55 56 host1x_hw_show_channel_cdma(m, ch, o); 57 58 mutex_unlock(&ch->cdma.lock); 59 60 return 0; 61 } 62 63 static void show_syncpts(struct host1x *m, struct output *o) 64 { 65 unsigned int i; 66 67 host1x_debug_output(o, "---- syncpts ----\n"); 68 69 for (i = 0; i < host1x_syncpt_nb_pts(m); i++) { 70 u32 max = host1x_syncpt_read_max(m->syncpt + i); 71 u32 min = host1x_syncpt_load(m->syncpt + i); 72 73 if (!min && !max) 74 continue; 75 76 host1x_debug_output(o, "id %u (%s) min %d max %d\n", 77 i, m->syncpt[i].name, min, max); 78 } 79 80 for (i = 0; i < host1x_syncpt_nb_bases(m); i++) { 81 u32 base_val; 82 83 base_val = host1x_syncpt_load_wait_base(m->syncpt + i); 84 if (base_val) 85 host1x_debug_output(o, "waitbase id %u val %d\n", i, 86 base_val); 87 } 88 89 host1x_debug_output(o, "\n"); 90 } 91 92 static void show_all(struct host1x *m, struct output *o, bool show_fifo) 93 { 94 int i; 95 96 host1x_hw_show_mlocks(m, o); 97 show_syncpts(m, o); 98 host1x_debug_output(o, "---- channels ----\n"); 99 100 for (i = 0; i < m->info->nb_channels; ++i) { 101 struct host1x_channel *ch = host1x_channel_get_index(m, i); 102 103 if (ch) { 104 show_channel(ch, o, show_fifo); 105 host1x_channel_put(ch); 106 } 107 } 108 } 109 110 static int host1x_debug_show_all(struct seq_file *s, void *unused) 111 { 112 struct output o = { 113 .fn = write_to_seqfile, 114 .ctx = s 115 }; 116 117 show_all(s->private, &o, true); 118 119 return 0; 120 } 121 122 static int host1x_debug_show(struct seq_file *s, void *unused) 123 { 124 struct output o = { 125 .fn = write_to_seqfile, 126 .ctx = s 127 }; 128 129 show_all(s->private, &o, false); 130 131 return 0; 132 } 133 134 static int host1x_debug_open_all(struct inode *inode, struct file *file) 135 { 136 return single_open(file, host1x_debug_show_all, inode->i_private); 137 } 138 139 static const struct file_operations host1x_debug_all_fops = { 140 .open = host1x_debug_open_all, 141 .read = seq_read, 142 .llseek = seq_lseek, 143 .release = single_release, 144 }; 145 146 static int host1x_debug_open(struct inode *inode, struct file *file) 147 { 148 return single_open(file, host1x_debug_show, inode->i_private); 149 } 150 151 static const struct file_operations host1x_debug_fops = { 152 .open = host1x_debug_open, 153 .read = seq_read, 154 .llseek = seq_lseek, 155 .release = single_release, 156 }; 157 158 static void host1x_debugfs_init(struct host1x *host1x) 159 { 160 struct dentry *de = debugfs_create_dir("tegra-host1x", NULL); 161 162 if (!de) 163 return; 164 165 /* Store the created entry */ 166 host1x->debugfs = de; 167 168 debugfs_create_file("status", S_IRUGO, de, host1x, &host1x_debug_fops); 169 debugfs_create_file("status_all", S_IRUGO, de, host1x, 170 &host1x_debug_all_fops); 171 172 debugfs_create_u32("trace_cmdbuf", S_IRUGO|S_IWUSR, de, 173 &host1x_debug_trace_cmdbuf); 174 175 host1x_hw_debug_init(host1x, de); 176 177 debugfs_create_u32("force_timeout_pid", S_IRUGO|S_IWUSR, de, 178 &host1x_debug_force_timeout_pid); 179 debugfs_create_u32("force_timeout_val", S_IRUGO|S_IWUSR, de, 180 &host1x_debug_force_timeout_val); 181 debugfs_create_u32("force_timeout_channel", S_IRUGO|S_IWUSR, de, 182 &host1x_debug_force_timeout_channel); 183 } 184 185 static void host1x_debugfs_exit(struct host1x *host1x) 186 { 187 debugfs_remove_recursive(host1x->debugfs); 188 } 189 190 void host1x_debug_init(struct host1x *host1x) 191 { 192 if (IS_ENABLED(CONFIG_DEBUG_FS)) 193 host1x_debugfs_init(host1x); 194 } 195 196 void host1x_debug_deinit(struct host1x *host1x) 197 { 198 if (IS_ENABLED(CONFIG_DEBUG_FS)) 199 host1x_debugfs_exit(host1x); 200 } 201 202 void host1x_debug_dump(struct host1x *host1x) 203 { 204 struct output o = { 205 .fn = write_to_printk 206 }; 207 208 show_all(host1x, &o, true); 209 } 210 211 void host1x_debug_dump_syncpts(struct host1x *host1x) 212 { 213 struct output o = { 214 .fn = write_to_printk 215 }; 216 217 show_syncpts(host1x, &o); 218 } 219