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);
  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 }