1 /* 2 * Copyright (C) 2010 Google, Inc. 3 * Author: Erik Gilling <[email protected]> 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 unsigned int i; 66 67 host1x_debug_output(o, "---- syncpts ----\n"); 68 for (i = 0; i < host1x_syncpt_nb_pts(m); i++) { 69 u32 max = host1x_syncpt_read_max(m->syncpt + i); 70 u32 min = host1x_syncpt_load(m->syncpt + i); 71 72 if (!min && !max) 73 continue; 74 75 host1x_debug_output(o, "id %u (%s) min %d max %d\n", 76 i, m->syncpt[i].name, min, max); 77 } 78 79 for (i = 0; i < host1x_syncpt_nb_bases(m); i++) { 80 u32 base_val; 81 82 base_val = host1x_syncpt_load_wait_base(m->syncpt + i); 83 if (base_val) 84 host1x_debug_output(o, "waitbase id %u val %d\n", i, 85 base_val); 86 } 87 88 host1x_debug_output(o, "\n"); 89 } 90 91 static void show_all(struct host1x *m, struct output *o) 92 { 93 struct host1x_channel *ch; 94 95 host1x_hw_show_mlocks(m, o); 96 show_syncpts(m, o); 97 host1x_debug_output(o, "---- channels ----\n"); 98 99 host1x_for_each_channel(m, ch) 100 show_channels(ch, o, true); 101 } 102 103 static void show_all_no_fifo(struct host1x *host1x, struct output *o) 104 { 105 struct host1x_channel *ch; 106 107 host1x_hw_show_mlocks(host1x, o); 108 show_syncpts(host1x, o); 109 host1x_debug_output(o, "---- channels ----\n"); 110 111 host1x_for_each_channel(host1x, ch) 112 show_channels(ch, o, false); 113 } 114 115 static int host1x_debug_show_all(struct seq_file *s, void *unused) 116 { 117 struct output o = { 118 .fn = write_to_seqfile, 119 .ctx = s 120 }; 121 show_all(s->private, &o); 122 return 0; 123 } 124 125 static int host1x_debug_show(struct seq_file *s, void *unused) 126 { 127 struct output o = { 128 .fn = write_to_seqfile, 129 .ctx = s 130 }; 131 show_all_no_fifo(s->private, &o); 132 return 0; 133 } 134 135 static int host1x_debug_open_all(struct inode *inode, struct file *file) 136 { 137 return single_open(file, host1x_debug_show_all, inode->i_private); 138 } 139 140 static const struct file_operations host1x_debug_all_fops = { 141 .open = host1x_debug_open_all, 142 .read = seq_read, 143 .llseek = seq_lseek, 144 .release = single_release, 145 }; 146 147 static int host1x_debug_open(struct inode *inode, struct file *file) 148 { 149 return single_open(file, host1x_debug_show, inode->i_private); 150 } 151 152 static const struct file_operations host1x_debug_fops = { 153 .open = host1x_debug_open, 154 .read = seq_read, 155 .llseek = seq_lseek, 156 .release = single_release, 157 }; 158 159 static void host1x_debugfs_init(struct host1x *host1x) 160 { 161 struct dentry *de = debugfs_create_dir("tegra-host1x", NULL); 162 163 if (!de) 164 return; 165 166 /* Store the created entry */ 167 host1x->debugfs = de; 168 169 debugfs_create_file("status", S_IRUGO, de, host1x, &host1x_debug_fops); 170 debugfs_create_file("status_all", S_IRUGO, de, host1x, 171 &host1x_debug_all_fops); 172 173 debugfs_create_u32("trace_cmdbuf", S_IRUGO|S_IWUSR, de, 174 &host1x_debug_trace_cmdbuf); 175 176 host1x_hw_debug_init(host1x, de); 177 178 debugfs_create_u32("force_timeout_pid", S_IRUGO|S_IWUSR, de, 179 &host1x_debug_force_timeout_pid); 180 debugfs_create_u32("force_timeout_val", S_IRUGO|S_IWUSR, de, 181 &host1x_debug_force_timeout_val); 182 debugfs_create_u32("force_timeout_channel", S_IRUGO|S_IWUSR, de, 183 &host1x_debug_force_timeout_channel); 184 } 185 186 static void host1x_debugfs_exit(struct host1x *host1x) 187 { 188 debugfs_remove_recursive(host1x->debugfs); 189 } 190 191 void host1x_debug_init(struct host1x *host1x) 192 { 193 if (IS_ENABLED(CONFIG_DEBUG_FS)) 194 host1x_debugfs_init(host1x); 195 } 196 197 void host1x_debug_deinit(struct host1x *host1x) 198 { 199 if (IS_ENABLED(CONFIG_DEBUG_FS)) 200 host1x_debugfs_exit(host1x); 201 } 202 203 void host1x_debug_dump(struct host1x *host1x) 204 { 205 struct output o = { 206 .fn = write_to_printk 207 }; 208 show_all(host1x, &o); 209 } 210 211 void host1x_debug_dump_syncpts(struct host1x *host1x) 212 { 213 struct output o = { 214 .fn = write_to_printk 215 }; 216 show_syncpts(host1x, &o); 217 } 218