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 #ifdef CONFIG_DEBUG_FS 100 static void show_all_no_fifo(struct host1x *host1x, struct output *o) 101 { 102 struct host1x_channel *ch; 103 104 host1x_hw_show_mlocks(host1x, o); 105 show_syncpts(host1x, o); 106 host1x_debug_output(o, "---- channels ----\n"); 107 108 host1x_for_each_channel(host1x, ch) 109 show_channels(ch, o, false); 110 } 111 112 static int host1x_debug_show_all(struct seq_file *s, void *unused) 113 { 114 struct output o = { 115 .fn = write_to_seqfile, 116 .ctx = s 117 }; 118 show_all(s->private, &o); 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 show_all_no_fifo(s->private, &o); 129 return 0; 130 } 131 132 static int host1x_debug_open_all(struct inode *inode, struct file *file) 133 { 134 return single_open(file, host1x_debug_show_all, inode->i_private); 135 } 136 137 static const struct file_operations host1x_debug_all_fops = { 138 .open = host1x_debug_open_all, 139 .read = seq_read, 140 .llseek = seq_lseek, 141 .release = single_release, 142 }; 143 144 static int host1x_debug_open(struct inode *inode, struct file *file) 145 { 146 return single_open(file, host1x_debug_show, inode->i_private); 147 } 148 149 static const struct file_operations host1x_debug_fops = { 150 .open = host1x_debug_open, 151 .read = seq_read, 152 .llseek = seq_lseek, 153 .release = single_release, 154 }; 155 156 void host1x_debug_init(struct host1x *host1x) 157 { 158 struct dentry *de = debugfs_create_dir("tegra-host1x", NULL); 159 160 if (!de) 161 return; 162 163 /* Store the created entry */ 164 host1x->debugfs = de; 165 166 debugfs_create_file("status", S_IRUGO, de, host1x, &host1x_debug_fops); 167 debugfs_create_file("status_all", S_IRUGO, de, host1x, 168 &host1x_debug_all_fops); 169 170 debugfs_create_u32("trace_cmdbuf", S_IRUGO|S_IWUSR, de, 171 &host1x_debug_trace_cmdbuf); 172 173 host1x_hw_debug_init(host1x, de); 174 175 debugfs_create_u32("force_timeout_pid", S_IRUGO|S_IWUSR, de, 176 &host1x_debug_force_timeout_pid); 177 debugfs_create_u32("force_timeout_val", S_IRUGO|S_IWUSR, de, 178 &host1x_debug_force_timeout_val); 179 debugfs_create_u32("force_timeout_channel", S_IRUGO|S_IWUSR, de, 180 &host1x_debug_force_timeout_channel); 181 } 182 183 void host1x_debug_deinit(struct host1x *host1x) 184 { 185 debugfs_remove_recursive(host1x->debugfs); 186 } 187 #else 188 void host1x_debug_init(struct host1x *host1x) 189 { 190 } 191 void host1x_debug_deinit(struct host1x *host1x) 192 { 193 } 194 #endif 195 196 void host1x_debug_dump(struct host1x *host1x) 197 { 198 struct output o = { 199 .fn = write_to_printk 200 }; 201 show_all(host1x, &o); 202 } 203 204 void host1x_debug_dump_syncpts(struct host1x *host1x) 205 { 206 struct output o = { 207 .fn = write_to_printk 208 }; 209 show_syncpts(host1x, &o); 210 } 211