LXR linux/drivers/gpu/drm/nouveau/nouveau

   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
  37static int
  38nouveau_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
  49static int
  50nouveau_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
  71static int
  72nouveau_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
 140static ssize_t
 141nouveau_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
 199static int
 200nouveau_debugfs_pstate_open(struct inode *inode, struct file *file)
 201{
 202        return single_open(file, nouveau_debugfs_pstate_get, inode->i_private);
 203}
 204
 205static 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        .release = single_release,
 211};
 212
 213static struct drm_info_list nouveau_debugfs_list[] = {
 214        { "vbios.rom",  nouveau_debugfs_vbios_image, 0, NULL },
 215        { "strap_peek", nouveau_debugfs_strap_peek, 0, NULL },
 216};
 217#define NOUVEAU_DEBUGFS_ENTRIES ARRAY_SIZE(nouveau_debugfs_list)
 218
 219static const struct nouveau_debugfs_files {
 220        const char *name;
 221        const struct file_operations *fops;
 222} nouveau_debugfs_files[] = {
 223        {"pstate", &nouveau_pstate_fops},
 224};
 225
 226void
 227nouveau_drm_debugfs_init(struct drm_minor *minor)
 228{
 229        struct nouveau_drm *drm = nouveau_drm(minor->dev);
 230        struct dentry *dentry;
 231        int i;
 232
 233        for (i = 0; i < ARRAY_SIZE(nouveau_debugfs_files); i++) {
 234                debugfs_create_file(nouveau_debugfs_files[i].name,
 235                                    S_IRUGO | S_IWUSR,
 236                                    minor->debugfs_root, minor->dev,
 237                                    nouveau_debugfs_files[i].fops);
 238        }
 239
 240        drm_debugfs_create_files(nouveau_debugfs_list,
 241                                 NOUVEAU_DEBUGFS_ENTRIES,
 242                                 minor->debugfs_root, minor);
 243
 244        /* Set the size of the vbios since we know it, and it's confusing to
 245         * userspace if it wants to seek() but the file has a length of 0
 246         */
 247        dentry = debugfs_lookup("vbios.rom", minor->debugfs_root);
 248        if (!dentry)
 249                return;
 250
 251        d_inode(dentry)->i_size = drm->vbios.length;
 252        dput(dentry);
 253}
 254
 255int
 256nouveau_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_ctor(&drm->client.device.object, "debugfsCtrl", 0,
 265                               NVIF_CLASS_CONTROL, NULL, 0,
 266                               &drm->debugfs->ctrl);
 267        if (ret)
 268                return ret;
 269
 270        return 0;
 271}
 272
 273void
 274nouveau_debugfs_fini(struct nouveau_drm *drm)
 275{
 276        if (drm->debugfs && drm->debugfs->ctrl.priv)
 277                nvif_object_dtor(&drm->debugfs->ctrl);
 278
 279        kfree(drm->debugfs);
 280        drm->debugfs = NULL;
 281}
 282