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, false); 44 } 45 46 void host1x_debug_cont(struct output *o, const char *fmt, ...) 47 { 48 va_list args; 49 int len; 50 51 va_start(args, fmt); 52 len = vsnprintf(o->buf, sizeof(o->buf), fmt, args); 53 va_end(args); 54 55 o->fn(o->ctx, o->buf, len, true); 56 } 57 58 static int show_channel(struct host1x_channel *ch, void *data, bool show_fifo) 59 { 60 struct host1x *m = dev_get_drvdata(ch->dev->parent); 61 struct output *o = data; 62 63 mutex_lock(&ch->cdma.lock); 64 65 if (show_fifo) 66 host1x_hw_show_channel_fifo(m, ch, o); 67 68 host1x_hw_show_channel_cdma(m, ch, o); 69 70 mutex_unlock(&ch->cdma.lock); 71 72 return 0; 73 } 74 75 static void show_syncpts(struct host1x *m, struct output *o) 76 { 77 unsigned int i; 78 79 host1x_debug_output(o, "---- syncpts ----\n"); 80 81 for (i = 0; i < host1x_syncpt_nb_pts(m); i++) { 82 u32 max = host1x_syncpt_read_max(m->syncpt + i); 83 u32 min = host1x_syncpt_load(m->syncpt + i); 84 85 if (!min && !max) 86 continue; 87 88 host1x_debug_output(o, "id %u (%s) min %d max %d\n", 89 i, m->syncpt[i].name, min, max); 90 } 91 92 for (i = 0; i < host1x_syncpt_nb_bases(m); i++) { 93 u32 base_val; 94 95 base_val = host1x_syncpt_load_wait_base(m->syncpt + i); 96 if (base_val) 97 host1x_debug_output(o, "waitbase id %u val %d\n", i, 98 base_val); 99 } 100 101 host1x_debug_output(o, "\n"); 102 } 103 104 static void show_all(struct host1x *m, struct output *o, bool show_fifo) 105 { 106 int i; 107 108 host1x_hw_show_mlocks(m, o); 109 show_syncpts(m, o); 110 host1x_debug_output(o, "---- channels ----\n"); 111 112 for (i = 0; i < m->info->nb_channels; ++i) { 113 struct host1x_channel *ch = host1x_channel_get_index(m, i); 114 115 if (ch) { 116 show_channel(ch, o, show_fifo); 117 host1x_channel_put(ch); 118 } 119 } 120 } 121 122 static int host1x_debug_show_all(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, true); 130 131 return 0; 132 } 133 134 static int host1x_debug_show(struct seq_file *s, void *unused) 135 { 136 struct output o = { 137 .fn = write_to_seqfile, 138 .ctx = s 139 }; 140 141 show_all(s->private, &o, false); 142 143 return 0; 144 } 145 146 static int host1x_debug_open_all(struct inode *inode, struct file *file) 147 { 148 return single_open(file, host1x_debug_show_all, inode->i_private); 149 } 150 151 static const struct file_operations host1x_debug_all_fops = { 152 .open = host1x_debug_open_all, 153 .read = seq_read, 154 .llseek = seq_lseek, 155 .release = single_release, 156 }; 157 158 static int host1x_debug_open(struct inode *inode, struct file *file) 159 { 160 return single_open(file, host1x_debug_show, inode->i_private); 161 } 162 163 static const struct file_operations host1x_debug_fops = { 164 .open = host1x_debug_open, 165 .read = seq_read, 166 .llseek = seq_lseek, 167 .release = single_release, 168 }; 169 170 static void host1x_debugfs_init(struct host1x *host1x) 171 { 172 struct dentry *de = debugfs_create_dir("tegra-host1x", NULL); 173 174 if (!de) 175 return; 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