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_channels(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->reflock); 52 53 if (ch->refcount) { 54 mutex_lock(&ch->cdma.lock); 55 56 if (show_fifo) 57 host1x_hw_show_channel_fifo(m, ch, o); 58 59 host1x_hw_show_channel_cdma(m, ch, o); 60 mutex_unlock(&ch->cdma.lock); 61 } 62 63 mutex_unlock(&ch->reflock); 64 65 return 0; 66 } 67 68 static void show_syncpts(struct host1x *m, struct output *o) 69 { 70 unsigned int i; 71 72 host1x_debug_output(o, "---- syncpts ----\n"); 73 74 for (i = 0; i < host1x_syncpt_nb_pts(m); i++) { 75 u32 max = host1x_syncpt_read_max(m->syncpt + i); 76 u32 min = host1x_syncpt_load(m->syncpt + i); 77 78 if (!min && !max) 79 continue; 80 81 host1x_debug_output(o, "id %u (%s) min %d max %d\n", 82 i, m->syncpt[i].name, min, max); 83 } 84 85 for (i = 0; i < host1x_syncpt_nb_bases(m); i++) { 86 u32 base_val; 87 88 base_val = host1x_syncpt_load_wait_base(m->syncpt + i); 89 if (base_val) 90 host1x_debug_output(o, "waitbase id %u val %d\n", i, 91 base_val); 92 } 93 94 host1x_debug_output(o, "\n"); 95 } 96 97 static void show_all(struct host1x *m, struct output *o) 98 { 99 struct host1x_channel *ch; 100 101 host1x_hw_show_mlocks(m, o); 102 show_syncpts(m, o); 103 host1x_debug_output(o, "---- channels ----\n"); 104 105 host1x_for_each_channel(m, ch) 106 show_channels(ch, o, true); 107 } 108 109 static void show_all_no_fifo(struct host1x *host1x, struct output *o) 110 { 111 struct host1x_channel *ch; 112 113 host1x_hw_show_mlocks(host1x, o); 114 show_syncpts(host1x, o); 115 host1x_debug_output(o, "---- channels ----\n"); 116 117 host1x_for_each_channel(host1x, ch) 118 show_channels(ch, o, false); 119 } 120 121 static int host1x_debug_show_all(struct seq_file *s, void *unused) 122 { 123 struct output o = { 124 .fn = write_to_seqfile, 125 .ctx = s 126 }; 127 128 show_all(s->private, &o); 129 130 return 0; 131 } 132 133 static int host1x_debug_show(struct seq_file *s, void *unused) 134 { 135 struct output o = { 136 .fn = write_to_seqfile, 137 .ctx = s 138 }; 139 140 show_all_no_fifo(s->private, &o); 141 142 return 0; 143 } 144 145 static int host1x_debug_open_all(struct inode *inode, struct file *file) 146 { 147 return single_open(file, host1x_debug_show_all, inode->i_private); 148 } 149 150 static const struct file_operations host1x_debug_all_fops = { 151 .open = host1x_debug_open_all, 152 .read = seq_read, 153 .llseek = seq_lseek, 154 .release = single_release, 155 }; 156 157 static int host1x_debug_open(struct inode *inode, struct file *file) 158 { 159 return single_open(file, host1x_debug_show, inode->i_private); 160 } 161 162 static const struct file_operations host1x_debug_fops = { 163 .open = host1x_debug_open, 164 .read = seq_read, 165 .llseek = seq_lseek, 166 .release = single_release, 167 }; 168 169 static void host1x_debugfs_init(struct host1x *host1x) 170 { 171 struct dentry *de = debugfs_create_dir("tegra-host1x", NULL); 172 173 if (!de) 174 return; 175 176 /* Store the created entry */ 177 host1x->debugfs = de; 178 179 debugfs_create_file("status", S_IRUGO, de, host1x, &host1x_debug_fops); 180 debugfs_create_file("status_all", S_IRUGO, de, host1x, 181 &host1x_debug_all_fops); 182 183 debugfs_create_u32("trace_cmdbuf", S_IRUGO|S_IWUSR, de, 184 &host1x_debug_trace_cmdbuf); 185 186 host1x_hw_debug_init(host1x, de); 187 188 debugfs_create_u32("force_timeout_pid", S_IRUGO|S_IWUSR, de, 189 &host1x_debug_force_timeout_pid); 190 debugfs_create_u32("force_timeout_val", S_IRUGO|S_IWUSR, de, 191 &host1x_debug_force_timeout_val); 192 debugfs_create_u32("force_timeout_channel", S_IRUGO|S_IWUSR, de, 193 &host1x_debug_force_timeout_channel); 194 } 195 196 static void host1x_debugfs_exit(struct host1x *host1x) 197 { 198 debugfs_remove_recursive(host1x->debugfs); 199 } 200 201 void host1x_debug_init(struct host1x *host1x) 202 { 203 if (IS_ENABLED(CONFIG_DEBUG_FS)) 204 host1x_debugfs_init(host1x); 205 } 206 207 void host1x_debug_deinit(struct host1x *host1x) 208 { 209 if (IS_ENABLED(CONFIG_DEBUG_FS)) 210 host1x_debugfs_exit(host1x); 211 } 212 213 void host1x_debug_dump(struct host1x *host1x) 214 { 215 struct output o = { 216 .fn = write_to_printk 217 }; 218 219 show_all(host1x, &o); 220 } 221 222 void host1x_debug_dump_syncpts(struct host1x *host1x) 223 { 224 struct output o = { 225 .fn = write_to_printk 226 }; 227 228 show_syncpts(host1x, &o); 229 } 230