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                 pm_runtime_put_autosuspend(drm->dev->dev);
  59                 return ret;
  60         }
  61
  62         seq_printf(m, "0x%08x\n",
  63                    nvif_rd32(&drm->client.device.object, 0x101000));
  64
  65         pm_runtime_mark_last_busy(drm->dev->dev);
  66         pm_runtime_put_autosuspend(drm->dev->dev);
  67
  68         return 0;
  69 }
  70
  71 static int
  72 nouveau_debugfs_pstate_get(struct seq_file *m, void *data)
  73 {
  74         struct drm_device *drm = m->private;
  75         struct nouveau_debugfs *debugfs = nouveau_debugfs(drm);
  76         struct nvif_object *ctrl = &debugfs->ctrl;
  77         struct nvif_control_pstate_info_v0 info = {};
  78         int ret, i;
  79
  80         if (!debugfs)
  81                 return -ENODEV;
  82
  83         ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_INFO, &info, sizeof(info));
  84         if (ret)
  85                 return ret;
  86
  87         for (i = 0; i < info.count + 1; i++) {
  88                 const s32 state = i < info.count ? i :
  89                         NVIF_CONTROL_PSTATE_ATTR_V0_STATE_CURRENT;
  90                 struct nvif_control_pstate_attr_v0 attr = {
  91                         .state = state,
  92                         .index = 0,
  93                 };
  94
  95                 ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_ATTR,
  96                                 &attr, sizeof(attr));
  97                 if (ret)
  98                         return ret;
  99
 100                 if (i < info.count)
 101                         seq_printf(m, "%02x:", attr.state);
 102                 else
 103                         seq_printf(m, "%s:", info.pwrsrc == 0 ? "DC" :
 104                                              info.pwrsrc == 1 ? "AC" : "--");
 105
 106                 attr.index = 0;
 107                 do {
 108                         attr.state = state;
 109                         ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_ATTR,
 110                                         &attr, sizeof(attr));
 111                         if (ret)
 112                                 return ret;
 113
 114                         seq_printf(m, " %s %d", attr.name, attr.min);
 115                         if (attr.min != attr.max)
 116                                 seq_printf(m, "-%d", attr.max);
 117                         seq_printf(m, " %s", attr.unit);
 118                 } while (attr.index);
 119
 120                 if (state >= 0) {
 121                         if (info.ustate_ac == state)
 122                                 seq_printf(m, " AC");
 123                         if (info.ustate_dc == state)
 124                                 seq_printf(m, " DC");
 125                         if (info.pstate == state)
 126                                 seq_printf(m, " *");
 127                 } else {
 128                         if (info.ustate_ac < -1)
 129                                 seq_printf(m, " AC");
 130                         if (info.ustate_dc < -1)
 131                                 seq_printf(m, " DC");
 132                 }
 133
 134                 seq_printf(m, "\n");
 135         }
 136
 137         return 0;
 138 }
 139
 140 static ssize_t
 141 nouveau_debugfs_pstate_set(struct file *file, const char __user *ubuf,
 142                            size_t len, loff_t *offp)
 143 {
 144         struct seq_file *m = file->private_data;
 145         struct drm_device *drm = m->private;
 146         struct nouveau_debugfs *debugfs = nouveau_debugfs(drm);
 147         struct nvif_object *ctrl = &debugfs->ctrl;
 148         struct nvif_control_pstate_user_v0 args = { .pwrsrc = -EINVAL };
 149         char buf[32] = {}, *tmp, *cur = buf;
 150         long value, ret;
 151
 152         if (!debugfs)
 153                 return -ENODEV;
 154
 155         if (len >= sizeof(buf))
 156                 return -EINVAL;
 157
 158         if (copy_from_user(buf, ubuf, len))
 159                 return -EFAULT;
 160
 161         if ((tmp = strchr(buf, '\n')))
 162                 *tmp = '\0';
 163
 164         if (!strncasecmp(cur, "dc:", 3)) {
 165                 args.pwrsrc = 0;
 166                 cur += 3;
 167         } else
 168         if (!strncasecmp(cur, "ac:", 3)) {
 169                 args.pwrsrc = 1;
 170                 cur += 3;
 171         }
 172
 173         if (!strcasecmp(cur, "none"))
 174                 args.ustate = NVIF_CONTROL_PSTATE_USER_V0_STATE_UNKNOWN;
 175         else
 176         if (!strcasecmp(cur, "auto"))
 177                 args.ustate = NVIF_CONTROL_PSTATE_USER_V0_STATE_PERFMON;
 178         else {
 179                 ret = kstrtol(cur, 16, &value);
 180                 if (ret)
 181                         return ret;
 182                 args.ustate = value;
 183         }
 184
 185         ret = pm_runtime_get_sync(drm->dev);
 186         if (ret < 0 && ret != -EACCES) {
 187                 pm_runtime_put_autosuspend(drm->dev);
 188                 return ret;
 189         }
 190
 191         ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_USER, &args, sizeof(args));
 192         pm_runtime_put_autosuspend(drm->dev);
 193         if (ret < 0)
 194                 return ret;
 195
 196         return len;
 197 }
 198
 199 static int
 200 nouveau_debugfs_pstate_open(struct inode *inode, struct file *file)
 201 {
 202         return single_open(file, nouveau_debugfs_pstate_get, inode->i_private);
 203 }
 204
 205 static const struct file_operations nouveau_pstate_fops = {
 206         .owner = THIS_MODULE,
 207         .open = nouveau_debugfs_pstate_open,
 208         .read = seq_read,
 209         .write = nouveau_debugfs_pstate_set,
 210 };
 211
 212 static struct drm_info_list nouveau_debugfs_list[] = {
 213         { "vbios.rom",  nouveau_debugfs_vbios_image, 0, NULL },
 214         { "strap_peek", nouveau_debugfs_strap_peek, 0, NULL },
 215 };
 216 #define NOUVEAU_DEBUGFS_ENTRIES ARRAY_SIZE(nouveau_debugfs_list)
 217
 218 static const struct nouveau_debugfs_files {
 219         const char *name;
 220         const struct file_operations *fops;
 221 } nouveau_debugfs_files[] = {
 222         {"pstate", &nouveau_pstate_fops},
 223 };
 224
 225 void
 226 nouveau_drm_debugfs_init(struct drm_minor *minor)
 227 {
 228         struct nouveau_drm *drm = nouveau_drm(minor->dev);
 229         struct dentry *dentry;
 230         int i;
 231
 232         for (i = 0; i < ARRAY_SIZE(nouveau_debugfs_files); i++) {
 233                 debugfs_create_file(nouveau_debugfs_files[i].name,
 234                                     S_IRUGO | S_IWUSR,
 235                                     minor->debugfs_root, minor->dev,
 236                                     nouveau_debugfs_files[i].fops);
 237         }
 238
 239         drm_debugfs_create_files(nouveau_debugfs_list,
 240                                  NOUVEAU_DEBUGFS_ENTRIES,
 241                                  minor->debugfs_root, minor);
 242
 243         /* Set the size of the vbios since we know it, and it's confusing to
 244          * userspace if it wants to seek() but the file has a length of 0
 245          */
 246         dentry = debugfs_lookup("vbios.rom", minor->debugfs_root);
 247         if (!dentry)
 248                 return;
 249
 250         d_inode(dentry)->i_size = drm->vbios.length;
 251         dput(dentry);
 252 }
 253
 254 int
 255 nouveau_debugfs_init(struct nouveau_drm *drm)
 256 {
 257         int ret;
 258
 259         drm->debugfs = kzalloc(sizeof(*drm->debugfs), GFP_KERNEL);
 260         if (!drm->debugfs)
 261                 return -ENOMEM;
 262
 263         ret = nvif_object_ctor(&drm->client.device.object, "debugfsCtrl", 0,
 264                                NVIF_CLASS_CONTROL, NULL, 0,
 265                                &drm->debugfs->ctrl);
 266         if (ret)
 267                 return ret;
 268
 269         return 0;
 270 }
 271
 272 void
 273 nouveau_debugfs_fini(struct nouveau_drm *drm)
 274 {
 275         if (drm->debugfs && drm->debugfs->ctrl.priv)
 276                 nvif_object_dtor(&drm->debugfs->ctrl);
 277
 278         kfree(drm->debugfs);
 279         drm->debugfs = NULL;
 280 }