drivers/gpu/host1x/debug.c

   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 }