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 o->fn(o->ctx, o->buf, len); 43 } 44 45 static int show_channels(struct host1x_channel *ch, void *data, bool show_fifo) 46 { 47 struct host1x *m = dev_get_drvdata(ch->dev->parent); 48 struct output *o = data; 49 50 mutex_lock(&ch->reflock); 51 if (ch->refcount) { 52 mutex_lock(&ch->cdma.lock); 53 if (show_fifo) 54 host1x_hw_show_channel_fifo(m, ch, o); 55 host1x_hw_show_channel_cdma(m, ch, o); 56 mutex_unlock(&ch->cdma.lock); 57 } 58 mutex_unlock(&ch->reflock); 59 60 return 0; 61 } 62 63 static void show_syncpts(struct host1x *m, struct output *o) 64 { 65 int i; 66 host1x_debug_output(o, "---- syncpts ----\n"); 67 for (i = 0; i < host1x_syncpt_nb_pts(m); i++) { 68 u32 max = host1x_syncpt_read_max(m->syncpt + i); 69 u32 min = host1x_syncpt_load(m->syncpt + i); 70 if (!min && !max) 71 continue; 72 host1x_debug_output(o, "id %d (%s) min %d max %d\n", 73 i, m->syncpt[i].name, min, max); 74 } 75 76 for (i = 0; i < host1x_syncpt_nb_bases(m); i++) { 77 u32 base_val; 78 base_val = host1x_syncpt_load_wait_base(m->syncpt + i); 79 if (base_val) 80 host1x_debug_output(o, "waitbase id %d val %d\n", i, 81 base_val); 82 } 83 84 host1x_debug_output(o, "\n"); 85 } 86 87 static void show_all(struct host1x *m, struct output *o) 88 { 89 struct host1x_channel *ch; 90 91 host1x_hw_show_mlocks(m, o); 92 show_syncpts(m, o); 93 host1x_debug_output(o, "---- channels ----\n"); 94 95 host1x_for_each_channel(m, ch) 96 show_channels(ch, o, true); 97 } 98 99 static void show_all_no_fifo(struct host1x *host1x, struct output *o) 100 { 101 struct host1x_channel *ch; 102 103 host1x_hw_show_mlocks(host1x, o); 104 show_syncpts(host1x, o); 105 host1x_debug_output(o, "---- channels ----\n"); 106 107 host1x_for_each_channel(host1x, ch) 108 show_channels(ch, o, false); 109 } 110 111 static int host1x_debug_show_all(struct seq_file *s, void *unused) 112 { 113 struct output o = { 114 .fn = write_to_seqfile, 115 .ctx = s 116 }; 117 show_all(s->private, &o); 118 return 0; 119 } 120 121 static int host1x_debug_show(struct seq_file *s, void *unused) 122 { 123 struct output o = { 124 .fn = write_to_seqfile, 125 .ctx = s 126 }; 127 show_all_no_fifo(s->private, &o); 128 return 0; 129 } 130 131 static int host1x_debug_open_all(struct inode *inode, struct file *file) 132 { 133 return single_open(file, host1x_debug_show_all, inode->i_private); 134 } 135 136 static const struct file_operations host1x_debug_all_fops = { 137 .open = host1x_debug_open_all, 138 .read = seq_read, 139 .llseek = seq_lseek, 140 .release = single_release, 141 }; 142 143 static int host1x_debug_open(struct inode *inode, struct file *file) 144 { 145 return single_open(file, host1x_debug_show, inode->i_private); 146 } 147 148 static const struct file_operations host1x_debug_fops = { 149 .open = host1x_debug_open, 150 .read = seq_read, 151 .llseek = seq_lseek, 152 .release = single_release, 153 }; 154 155 static void host1x_debugfs_init(struct host1x *host1x) 156 { 157 struct dentry *de = debugfs_create_dir("tegra-host1x", NULL); 158 159 if (!de) 160 return; 161 162 /* Store the created entry */ 163 host1x->debugfs = de; 164 165 debugfs_create_file("status", S_IRUGO, de, host1x, &host1x_debug_fops); 166 debugfs_create_file("status_all", S_IRUGO, de, host1x, 167 &host1x_debug_all_fops); 168 169 debugfs_create_u32("trace_cmdbuf", S_IRUGO|S_IWUSR, de, 170 &host1x_debug_trace_cmdbuf); 171 172 host1x_hw_debug_init(host1x, de); 173 174 debugfs_create_u32("force_timeout_pid", S_IRUGO|S_IWUSR, de, 175 &host1x_debug_force_timeout_pid); 176 debugfs_create_u32("force_timeout_val", S_IRUGO|S_IWUSR, de, 177 &host1x_debug_force_timeout_val); 178 debugfs_create_u32("force_timeout_channel", S_IRUGO|S_IWUSR, de, 179 &host1x_debug_force_timeout_channel); 180 } 181 182 static void host1x_debugfs_exit(struct host1x *host1x) 183 { 184 debugfs_remove_recursive(host1x->debugfs); 185 } 186 187 void host1x_debug_init(struct host1x *host1x) 188 { 189 if (IS_ENABLED(CONFIG_DEBUG_FS)) 190 host1x_debugfs_init(host1x); 191 } 192 193 void host1x_debug_deinit(struct host1x *host1x) 194 { 195 if (IS_ENABLED(CONFIG_DEBUG_FS)) 196 host1x_debugfs_exit(host1x); 197 } 198 199 void host1x_debug_dump(struct host1x *host1x) 200 { 201 struct output o = { 202 .fn = write_to_printk 203 }; 204 show_all(host1x, &o); 205 } 206 207 void host1x_debug_dump_syncpts(struct host1x *host1x) 208 { 209 struct output o = { 210 .fn = write_to_printk 211 }; 212 show_syncpts(host1x, &o); 213 } 214