drivers/gpu/host1x/debug.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2010 Google, Inc.
   4  * Author: Erik Gilling <konkers@android.com>
   5  *
   6  * Copyright (C) 2011-2013 NVIDIA Corporation
   7  */
   8
   9 #include <linux/debugfs.h>
  10 #include <linux/seq_file.h>
  11 #include <linux/uaccess.h>
  12
  13 #include <linux/io.h>
  14
  15 #include "dev.h"
  16 #include "debug.h"
  17 #include "channel.h"
  18
  19 static DEFINE_MUTEX(debug_lock);
  20
  21 unsigned int host1x_debug_trace_cmdbuf;
  22
  23 static pid_t host1x_debug_force_timeout_pid;
  24 static u32 host1x_debug_force_timeout_val;
  25 static u32 host1x_debug_force_timeout_channel;
  26
  27 void host1x_debug_output(struct output *o, const char *fmt, ...)
  28 {
  29         va_list args;
  30         int len;
  31
  32         va_start(args, fmt);
  33         len = vsnprintf(o->buf, sizeof(o->buf), fmt, args);
  34         va_end(args);
  35
  36         o->fn(o->ctx, o->buf, len, false);
  37 }
  38
  39 void host1x_debug_cont(struct output *o, const char *fmt, ...)
  40 {
  41         va_list args;
  42         int len;
  43
  44         va_start(args, fmt);
  45         len = vsnprintf(o->buf, sizeof(o->buf), fmt, args);
  46         va_end(args);
  47
  48         o->fn(o->ctx, o->buf, len, true);
  49 }
  50
  51 static int show_channel(struct host1x_channel *ch, void *data, bool show_fifo)
  52 {
  53         struct host1x *m = dev_get_drvdata(ch->dev->parent);
  54         struct output *o = data;
  55
  56         mutex_lock(&ch->cdma.lock);
  57         mutex_lock(&debug_lock);
  58
  59         if (show_fifo)
  60                 host1x_hw_show_channel_fifo(m, ch, o);
  61
  62         host1x_hw_show_channel_cdma(m, ch, o);
  63
  64         mutex_unlock(&debug_lock);
  65         mutex_unlock(&ch->cdma.lock);
  66
  67         return 0;
  68 }
  69
  70 static void show_syncpts(struct host1x *m, struct output *o)
  71 {
  72         unsigned int i;
  73
  74         host1x_debug_output(o, "---- syncpts ----\n");
  75
  76         for (i = 0; i < host1x_syncpt_nb_pts(m); i++) {
  77                 u32 max = host1x_syncpt_read_max(m->syncpt + i);
  78                 u32 min = host1x_syncpt_load(m->syncpt + i);
  79
  80                 if (!min && !max)
  81                         continue;
  82
  83                 host1x_debug_output(o, "id %u (%s) min %d max %d\n",
  84                                     i, m->syncpt[i].name, min, max);
  85         }
  86
  87         for (i = 0; i < host1x_syncpt_nb_bases(m); i++) {
  88                 u32 base_val;
  89
  90                 base_val = host1x_syncpt_load_wait_base(m->syncpt + i);
  91                 if (base_val)
  92                         host1x_debug_output(o, "waitbase id %u val %d\n", i,
  93                                             base_val);
  94         }
  95
  96         host1x_debug_output(o, "\n");
  97 }
  98
  99 static void show_all(struct host1x *m, struct output *o, bool show_fifo)
 100 {
 101         unsigned int i;
 102
 103         host1x_hw_show_mlocks(m, o);
 104         show_syncpts(m, o);
 105         host1x_debug_output(o, "---- channels ----\n");
 106
 107         for (i = 0; i < m->info->nb_channels; ++i) {
 108                 struct host1x_channel *ch = host1x_channel_get_index(m, i);
 109
 110                 if (ch) {
 111                         show_channel(ch, o, show_fifo);
 112                         host1x_channel_put(ch);
 113                 }
 114         }
 115 }
 116
 117 static int host1x_debug_show_all(struct seq_file *s, void *unused)
 118 {
 119         struct output o = {
 120                 .fn = write_to_seqfile,
 121                 .ctx = s
 122         };
 123
 124         show_all(s->private, &o, true);
 125
 126         return 0;
 127 }
 128
 129 static int host1x_debug_show(struct seq_file *s, void *unused)
 130 {
 131         struct output o = {
 132                 .fn = write_to_seqfile,
 133                 .ctx = s
 134         };
 135
 136         show_all(s->private, &o, false);
 137
 138         return 0;
 139 }
 140
 141 static int host1x_debug_open_all(struct inode *inode, struct file *file)
 142 {
 143         return single_open(file, host1x_debug_show_all, inode->i_private);
 144 }
 145
 146 static const struct file_operations host1x_debug_all_fops = {
 147         .open = host1x_debug_open_all,
 148         .read = seq_read,
 149         .llseek = seq_lseek,
 150         .release = single_release,
 151 };
 152
 153 static int host1x_debug_open(struct inode *inode, struct file *file)
 154 {
 155         return single_open(file, host1x_debug_show, inode->i_private);
 156 }
 157
 158 static const struct file_operations host1x_debug_fops = {
 159         .open = host1x_debug_open,
 160         .read = seq_read,
 161         .llseek = seq_lseek,
 162         .release = single_release,
 163 };
 164
 165 static void host1x_debugfs_init(struct host1x *host1x)
 166 {
 167         struct dentry *de = debugfs_create_dir("tegra-host1x", NULL);
 168
 169         /* Store the created entry */
 170         host1x->debugfs = de;
 171
 172         debugfs_create_file("status", S_IRUGO, de, host1x, &host1x_debug_fops);
 173         debugfs_create_file("status_all", S_IRUGO, de, host1x,
 174                             &host1x_debug_all_fops);
 175
 176         debugfs_create_u32("trace_cmdbuf", S_IRUGO|S_IWUSR, de,
 177                            &host1x_debug_trace_cmdbuf);
 178
 179         host1x_hw_debug_init(host1x, de);
 180
 181         debugfs_create_u32("force_timeout_pid", S_IRUGO|S_IWUSR, de,
 182                            &host1x_debug_force_timeout_pid);
 183         debugfs_create_u32("force_timeout_val", S_IRUGO|S_IWUSR, de,
 184                            &host1x_debug_force_timeout_val);
 185         debugfs_create_u32("force_timeout_channel", S_IRUGO|S_IWUSR, de,
 186                            &host1x_debug_force_timeout_channel);
 187 }
 188
 189 static void host1x_debugfs_exit(struct host1x *host1x)
 190 {
 191         debugfs_remove_recursive(host1x->debugfs);
 192 }
 193
 194 void host1x_debug_init(struct host1x *host1x)
 195 {
 196         if (IS_ENABLED(CONFIG_DEBUG_FS))
 197                 host1x_debugfs_init(host1x);
 198 }
 199
 200 void host1x_debug_deinit(struct host1x *host1x)
 201 {
 202         if (IS_ENABLED(CONFIG_DEBUG_FS))
 203                 host1x_debugfs_exit(host1x);
 204 }
 205
 206 void host1x_debug_dump(struct host1x *host1x)
 207 {
 208         struct output o = {
 209                 .fn = write_to_printk
 210         };
 211
 212         show_all(host1x, &o, true);
 213 }
 214
 215 void host1x_debug_dump_syncpts(struct host1x *host1x)
 216 {
 217         struct output o = {
 218                 .fn = write_to_printk
 219         };
 220
 221         show_syncpts(host1x, &o);
 222 }