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_pstate_get(struct seq_file *m, void *data)
  51 {
  52         struct drm_device *drm = m->private;
  53         struct nouveau_debugfs *debugfs = nouveau_debugfs(drm);
  54         struct nvif_object *ctrl = &debugfs->ctrl;
  55         struct nvif_control_pstate_info_v0 info = {};
  56         int ret, i;
  57
  58         if (!debugfs)
  59                 return -ENODEV;
  60
  61         ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_INFO, &info, sizeof(info));
  62         if (ret)
  63                 return ret;
  64
  65         for (i = 0; i < info.count + 1; i++) {
  66                 const s32 state = i < info.count ? i :
  67                         NVIF_CONTROL_PSTATE_ATTR_V0_STATE_CURRENT;
  68                 struct nvif_control_pstate_attr_v0 attr = {
  69                         .state = state,
  70                         .index = 0,
  71                 };
  72
  73                 ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_ATTR,
  74                                 &attr, sizeof(attr));
  75                 if (ret)
  76                         return ret;
  77
  78                 if (i < info.count)
  79                         seq_printf(m, "%02x:", attr.state);
  80                 else
  81                         seq_printf(m, "%s:", info.pwrsrc == 0 ? "DC" :
  82                                              info.pwrsrc == 1 ? "AC" : "--");
  83
  84                 attr.index = 0;
  85                 do {
  86                         attr.state = state;
  87                         ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_ATTR,
  88                                         &attr, sizeof(attr));
  89                         if (ret)
  90                                 return ret;
  91
  92                         seq_printf(m, " %s %d", attr.name, attr.min);
  93                         if (attr.min != attr.max)
  94                                 seq_printf(m, "-%d", attr.max);
  95                         seq_printf(m, " %s", attr.unit);
  96                 } while (attr.index);
  97
  98                 if (state >= 0) {
  99                         if (info.ustate_ac == state)
 100                                 seq_printf(m, " AC");
 101                         if (info.ustate_dc == state)
 102                                 seq_printf(m, " DC");
 103                         if (info.pstate == state)
 104                                 seq_printf(m, " *");
 105                 } else {
 106                         if (info.ustate_ac < -1)
 107                                 seq_printf(m, " AC");
 108                         if (info.ustate_dc < -1)
 109                                 seq_printf(m, " DC");
 110                 }
 111
 112                 seq_printf(m, "\n");
 113         }
 114
 115         return 0;
 116 }
 117
 118 static ssize_t
 119 nouveau_debugfs_pstate_set(struct file *file, const char __user *ubuf,
 120                            size_t len, loff_t *offp)
 121 {
 122         struct seq_file *m = file->private_data;
 123         struct drm_device *drm = m->private;
 124         struct nouveau_debugfs *debugfs = nouveau_debugfs(drm);
 125         struct nvif_object *ctrl = &debugfs->ctrl;
 126         struct nvif_control_pstate_user_v0 args = { .pwrsrc = -EINVAL };
 127         char buf[32] = {}, *tmp, *cur = buf;
 128         long value, ret;
 129
 130         if (!debugfs)
 131                 return -ENODEV;
 132
 133         if (len >= sizeof(buf))
 134                 return -EINVAL;
 135
 136         if (copy_from_user(buf, ubuf, len))
 137                 return -EFAULT;
 138
 139         if ((tmp = strchr(buf, '\n')))
 140                 *tmp = '\0';
 141
 142         if (!strncasecmp(cur, "dc:", 3)) {
 143                 args.pwrsrc = 0;
 144                 cur += 3;
 145         } else
 146         if (!strncasecmp(cur, "ac:", 3)) {
 147                 args.pwrsrc = 1;
 148                 cur += 3;
 149         }
 150
 151         if (!strcasecmp(cur, "none"))
 152                 args.ustate = NVIF_CONTROL_PSTATE_USER_V0_STATE_UNKNOWN;
 153         else
 154         if (!strcasecmp(cur, "auto"))
 155                 args.ustate = NVIF_CONTROL_PSTATE_USER_V0_STATE_PERFMON;
 156         else {
 157                 ret = kstrtol(cur, 16, &value);
 158                 if (ret)
 159                         return ret;
 160                 args.ustate = value;
 161         }
 162
 163         ret = pm_runtime_get_sync(drm->dev);
 164         if (IS_ERR_VALUE(ret) && ret != -EACCES)
 165                 return ret;
 166         ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_USER, &args, sizeof(args));
 167         pm_runtime_put_autosuspend(drm->dev);
 168         if (ret < 0)
 169                 return ret;
 170
 171         return len;
 172 }
 173
 174 static int
 175 nouveau_debugfs_pstate_open(struct inode *inode, struct file *file)
 176 {
 177         return single_open(file, nouveau_debugfs_pstate_get, inode->i_private);
 178 }
 179
 180 static const struct file_operations nouveau_pstate_fops = {
 181         .owner = THIS_MODULE,
 182         .open = nouveau_debugfs_pstate_open,
 183         .read = seq_read,
 184         .write = nouveau_debugfs_pstate_set,
 185 };
 186
 187 static struct drm_info_list nouveau_debugfs_list[] = {
 188         { "vbios.rom", nouveau_debugfs_vbios_image, 0, NULL },
 189 };
 190 #define NOUVEAU_DEBUGFS_ENTRIES ARRAY_SIZE(nouveau_debugfs_list)
 191
 192 static const struct nouveau_debugfs_files {
 193         const char *name;
 194         const struct file_operations *fops;
 195 } nouveau_debugfs_files[] = {
 196         {"pstate", &nouveau_pstate_fops},
 197 };
 198
 199 int
 200 nouveau_drm_debugfs_init(struct drm_minor *minor)
 201 {
 202         struct dentry *dentry;
 203         int i;
 204
 205         for (i = 0; i < ARRAY_SIZE(nouveau_debugfs_files); i++) {
 206                 dentry = debugfs_create_file(nouveau_debugfs_files[i].name,
 207                                              S_IRUGO | S_IWUSR,
 208                                              minor->debugfs_root, minor->dev,
 209                                              nouveau_debugfs_files[i].fops);
 210                 if (!dentry)
 211                         return -ENOMEM;
 212         }
 213
 214         return drm_debugfs_create_files(nouveau_debugfs_list,
 215                                         NOUVEAU_DEBUGFS_ENTRIES,
 216                                         minor->debugfs_root, minor);
 217 }
 218
 219 int
 220 nouveau_debugfs_init(struct nouveau_drm *drm)
 221 {
 222         int ret;
 223
 224         drm->debugfs = kzalloc(sizeof(*drm->debugfs), GFP_KERNEL);
 225         if (!drm->debugfs)
 226                 return -ENOMEM;
 227
 228         ret = nvif_object_init(&drm->client.device.object, 0,
 229                                NVIF_CLASS_CONTROL, NULL, 0,
 230                                &drm->debugfs->ctrl);
 231         if (ret)
 232                 return ret;
 233
 234         return 0;
 235 }
 236
 237 void
 238 nouveau_debugfs_fini(struct nouveau_drm *drm)
 239 {
 240         if (drm->debugfs && drm->debugfs->ctrl.priv)
 241                 nvif_object_fini(&drm->debugfs->ctrl);
 242
 243         kfree(drm->debugfs);
 244         drm->debugfs = NULL;
 245 }