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         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 }