drivers/gpu/drm/nouveau/nouveau_debugfs.c

   1 /*
   2  * Copyright (C) 2009 Red Hat <bskeggs@redhat.com>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining
   5  * a copy of this software and associated documentation files (the
   6  * "Software"), to deal in the Software without restriction, including
   7  * without limitation the rights to use, copy, modify, merge, publish,
   8  * distribute, sublicense, and/or sell copies of the Software, and to
   9  * permit persons to whom the Software is furnished to do so, subject to
  10  * the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the
  13  * next paragraph) shall be included in all copies or substantial
  14  * portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  17  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  18  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  19  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  20  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  21  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  22  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  */
  25
  26 /*
  27  * Authors:
  28  *  Ben Skeggs <bskeggs@redhat.com>
  29  */
  30
  31 #include <linux/debugfs.h>
  32 #include <nvif/class.h>
  33 #include <nvif/if0001.h>
  34 #include "nouveau_debugfs.h"
  35 #include "nouveau_drv.h"
  36
  37 static int
  38 nouveau_debugfs_vbios_image(struct seq_file *m, void *data)
  39 {
  40         struct drm_info_node *node = (struct drm_info_node *) m->private;
  41         struct nouveau_drm *drm = nouveau_drm(node->minor->dev);
  42         int i;
  43
  44         for (i = 0; i < drm->vbios.length; i++)
  45                 seq_printf(m, "%c", drm->vbios.data[i]);
  46         return 0;
  47 }
  48
  49 static int
  50 nouveau_debugfs_strap_peek(struct seq_file *m, void *data)
  51 {
  52         struct drm_info_node *node = m->private;
  53         struct nouveau_drm *drm = nouveau_drm(node->minor->dev);
  54         int ret;
  55
  56         ret = pm_runtime_get_sync(drm->dev->dev);
  57         if (ret < 0 && ret != -EACCES)
  58                 return ret;
  59
  60         seq_printf(m, "0x%08x\n",
  61                    nvif_rd32(&drm->client.device.object, 0x101000));
  62
  63         pm_runtime_mark_last_busy(drm->dev->dev);
  64         pm_runtime_put_autosuspend(drm->dev->dev);
  65
  66         return 0;
  67 }
  68
  69 static int
  70 nouveau_debugfs_pstate_get(struct seq_file *m, void *data)
  71 {
  72         struct drm_device *drm = m->private;
  73         struct nouveau_debugfs *debugfs = nouveau_debugfs(drm);
  74         struct nvif_object *ctrl = &debugfs->ctrl;
  75         struct nvif_control_pstate_info_v0 info = {};
  76         int ret, i;
  77
  78         if (!debugfs)
  79                 return -ENODEV;
  80
  81         ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_INFO, &info, sizeof(info));
  82         if (ret)
  83                 return ret;
  84
  85         for (i = 0; i < info.count + 1; i++) {
  86                 const s32 state = i < info.count ? i :
  87                         NVIF_CONTROL_PSTATE_ATTR_V0_STATE_CURRENT;
  88                 struct nvif_control_pstate_attr_v0 attr = {
  89                         .state = state,
  90                         .index = 0,
  91                 };
  92
  93                 ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_ATTR,
  94                                 &attr, sizeof(attr));
  95                 if (ret)
  96                         return ret;
  97
  98                 if (i < info.count)
  99                         seq_printf(m, "%02x:", attr.state);
 100                 else
 101                         seq_printf(m, "%s:", info.pwrsrc == 0 ? "DC" :
 102                                              info.pwrsrc == 1 ? "AC" : "--");
 103
 104                 attr.index = 0;
 105                 do {
 106                         attr.state = state;
 107                         ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_ATTR,
 108                                         &attr, sizeof(attr));
 109                         if (ret)
 110                                 return ret;
 111
 112                         seq_printf(m, " %s %d", attr.name, attr.min);
 113                         if (attr.min != attr.max)
 114                                 seq_printf(m, "-%d", attr.max);
 115                         seq_printf(m, " %s", attr.unit);
 116                 } while (attr.index);
 117
 118                 if (state >= 0) {
 119                         if (info.ustate_ac == state)
 120                                 seq_printf(m, " AC");
 121                         if (info.ustate_dc == state)
 122                                 seq_printf(m, " DC");
 123                         if (info.pstate == state)
 124                                 seq_printf(m, " *");
 125                 } else {
 126                         if (info.ustate_ac < -1)
 127                                 seq_printf(m, " AC");
 128                         if (info.ustate_dc < -1)
 129                                 seq_printf(m, " DC");
 130                 }
 131
 132                 seq_printf(m, "\n");
 133         }
 134
 135         return 0;
 136 }
 137
 138 static ssize_t
 139 nouveau_debugfs_pstate_set(struct file *file, const char __user *ubuf,
 140                            size_t len, loff_t *offp)
 141 {
 142         struct seq_file *m = file->private_data;
 143         struct drm_device *drm = m->private;
 144         struct nouveau_debugfs *debugfs = nouveau_debugfs(drm);
 145         struct nvif_object *ctrl = &debugfs->ctrl;
 146         struct nvif_control_pstate_user_v0 args = { .pwrsrc = -EINVAL };
 147         char buf[32] = {}, *tmp, *cur = buf;
 148         long value, ret;
 149
 150         if (!debugfs)
 151                 return -ENODEV;
 152
 153         if (len >= sizeof(buf))
 154                 return -EINVAL;
 155
 156         if (copy_from_user(buf, ubuf, len))
 157                 return -EFAULT;
 158
 159         if ((tmp = strchr(buf, '\n')))
 160                 *tmp = '\0';
 161
 162         if (!strncasecmp(cur, "dc:", 3)) {
 163                 args.pwrsrc = 0;
 164                 cur += 3;
 165         } else
 166         if (!strncasecmp(cur, "ac:", 3)) {
 167                 args.pwrsrc = 1;
 168                 cur += 3;
 169         }
 170
 171         if (!strcasecmp(cur, "none"))
 172                 args.ustate = NVIF_CONTROL_PSTATE_USER_V0_STATE_UNKNOWN;
 173         else
 174         if (!strcasecmp(cur, "auto"))
 175                 args.ustate = NVIF_CONTROL_PSTATE_USER_V0_STATE_PERFMON;
 176         else {
 177                 ret = kstrtol(cur, 16, &value);
 178                 if (ret)
 179                         return ret;
 180                 args.ustate = value;
 181         }
 182
 183         ret = pm_runtime_get_sync(drm->dev);
 184         if (ret < 0 && ret != -EACCES)
 185                 return ret;
 186         ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_USER, &args, sizeof(args));
 187         pm_runtime_put_autosuspend(drm->dev);
 188         if (ret < 0)
 189                 return ret;
 190
 191         return len;
 192 }
 193
 194 static int
 195 nouveau_debugfs_pstate_open(struct inode *inode, struct file *file)
 196 {
 197         return single_open(file, nouveau_debugfs_pstate_get, inode->i_private);
 198 }
 199
 200 static const struct file_operations nouveau_pstate_fops = {
 201         .owner = THIS_MODULE,
 202         .open = nouveau_debugfs_pstate_open,
 203         .read = seq_read,
 204         .write = nouveau_debugfs_pstate_set,
 205 };
 206
 207 static struct drm_info_list nouveau_debugfs_list[] = {
 208         { "vbios.rom",  nouveau_debugfs_vbios_image, 0, NULL },
 209         { "strap_peek", nouveau_debugfs_strap_peek, 0, NULL },
 210 };
 211 #define NOUVEAU_DEBUGFS_ENTRIES ARRAY_SIZE(nouveau_debugfs_list)
 212
 213 static const struct nouveau_debugfs_files {
 214         const char *name;
 215         const struct file_operations *fops;
 216 } nouveau_debugfs_files[] = {
 217         {"pstate", &nouveau_pstate_fops},
 218 };
 219
 220 int
 221 nouveau_drm_debugfs_init(struct drm_minor *minor)
 222 {
 223         struct nouveau_drm *drm = nouveau_drm(minor->dev);
 224         struct dentry *dentry;
 225         int i, ret;
 226
 227         for (i = 0; i < ARRAY_SIZE(nouveau_debugfs_files); i++) {
 228                 dentry = debugfs_create_file(nouveau_debugfs_files[i].name,
 229                                              S_IRUGO | S_IWUSR,
 230                                              minor->debugfs_root, minor->dev,
 231                                              nouveau_debugfs_files[i].fops);
 232                 if (!dentry)
 233                         return -ENOMEM;
 234         }
 235
 236         ret = drm_debugfs_create_files(nouveau_debugfs_list,
 237                                        NOUVEAU_DEBUGFS_ENTRIES,
 238                                        minor->debugfs_root, minor);
 239         if (ret)
 240                 return ret;
 241
 242         /* Set the size of the vbios since we know it, and it's confusing to
 243          * userspace if it wants to seek() but the file has a length of 0
 244          */
 245         dentry = debugfs_lookup("vbios.rom", minor->debugfs_root);
 246         if (!dentry)
 247                 return 0;
 248
 249         d_inode(dentry)->i_size = drm->vbios.length;
 250         dput(dentry);
 251
 252         return 0;
 253 }
 254
 255 int
 256 nouveau_debugfs_init(struct nouveau_drm *drm)
 257 {
 258         int ret;
 259
 260         drm->debugfs = kzalloc(sizeof(*drm->debugfs), GFP_KERNEL);
 261         if (!drm->debugfs)
 262                 return -ENOMEM;
 263
 264         ret = nvif_object_init(&drm->client.device.object, 0,
 265                                NVIF_CLASS_CONTROL, NULL, 0,
 266                                &drm->debugfs->ctrl);
 267         if (ret)
 268                 return ret;
 269
 270         return 0;
 271 }
 272
 273 void
 274 nouveau_debugfs_fini(struct nouveau_drm *drm)
 275 {
 276         if (drm->debugfs && drm->debugfs->ctrl.priv)
 277                 nvif_object_fini(&drm->debugfs->ctrl);
 278
 279         kfree(drm->debugfs);
 280         drm->debugfs = NULL;
 281 }