* DEALINGS IN THE SOFTWARE.
*/
+#include <linux/fs.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
+#include <linux/mount.h>
#include <linux/slab.h>
#include <drm/drmP.h>
#include <drm/drm_core.h>
unsigned int drm_rnodes = 0; /* 1 to enable experimental render nodes API */
EXPORT_SYMBOL(drm_rnodes);
+/* 1 to allow user space to request universal planes (experimental) */
+unsigned int drm_universal_planes = 0;
+EXPORT_SYMBOL(drm_universal_planes);
+
unsigned int drm_vblank_offdelay = 5000; /* Default to 5000 msecs. */
EXPORT_SYMBOL(drm_vblank_offdelay);
module_param_named(debug, drm_debug, int, 0600);
module_param_named(rnodes, drm_rnodes, int, 0600);
+module_param_named(universal_planes, drm_universal_planes, int, 0600);
module_param_named(vblankoffdelay, drm_vblank_offdelay, int, 0600);
module_param_named(timestamp_precision_usec, drm_timestamp_precision, int, 0600);
module_param_named(timestamp_monotonic, drm_timestamp_monotonic, int, 0600);
}
EXPORT_SYMBOL(drm_err);
-void drm_ut_debug_printk(unsigned int request_level,
- const char *prefix,
- const char *function_name,
- const char *format, ...)
+void drm_ut_debug_printk(const char *function_name, const char *format, ...)
{
struct va_format vaf;
va_list args;
- if (drm_debug & request_level) {
- va_start(args, format);
- vaf.fmt = format;
- vaf.va = &args;
-
- if (function_name)
- printk(KERN_DEBUG "[%s:%s], %pV", prefix,
- function_name, &vaf);
- else
- printk(KERN_DEBUG "%pV", &vaf);
- va_end(args);
- }
+ va_start(args, format);
+ vaf.fmt = format;
+ vaf.va = &args;
+
+ printk(KERN_DEBUG "[" DRM_NAME ":%s] %pV", function_name, &vaf);
+
+ va_end(args);
}
EXPORT_SYMBOL(drm_ut_debug_printk);
INIT_LIST_HEAD(&master->magicfree);
master->minor = minor;
- list_add_tail(&master->head, &minor->master_list);
-
return master;
}
struct drm_device *dev = master->minor->dev;
struct drm_map_list *r_list, *list_temp;
- list_del(&master->head);
-
+ mutex_lock(&dev->struct_mutex);
if (dev->driver->master_destroy)
dev->driver->master_destroy(dev, master);
drm_ht_remove(&master->magiclist);
+ mutex_unlock(&dev->struct_mutex);
kfree(master);
}
{
int ret = 0;
+ mutex_lock(&dev->master_mutex);
if (file_priv->is_master)
- return 0;
-
- if (file_priv->minor->master && file_priv->minor->master != file_priv->master)
- return -EINVAL;
+ goto out_unlock;
- if (!file_priv->master)
- return -EINVAL;
+ if (file_priv->minor->master) {
+ ret = -EINVAL;
+ goto out_unlock;
+ }
- if (file_priv->minor->master)
- return -EINVAL;
+ if (!file_priv->master) {
+ ret = -EINVAL;
+ goto out_unlock;
+ }
- mutex_lock(&dev->struct_mutex);
file_priv->minor->master = drm_master_get(file_priv->master);
file_priv->is_master = 1;
if (dev->driver->master_set) {
drm_master_put(&file_priv->minor->master);
}
}
- mutex_unlock(&dev->struct_mutex);
+out_unlock:
+ mutex_unlock(&dev->master_mutex);
return ret;
}
int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
+ int ret = -EINVAL;
+
+ mutex_lock(&dev->master_mutex);
if (!file_priv->is_master)
- return -EINVAL;
+ goto out_unlock;
if (!file_priv->minor->master)
- return -EINVAL;
+ goto out_unlock;
- mutex_lock(&dev->struct_mutex);
+ ret = 0;
if (dev->driver->master_drop)
dev->driver->master_drop(dev, file_priv, false);
drm_master_put(&file_priv->minor->master);
file_priv->is_master = 0;
- mutex_unlock(&dev->struct_mutex);
- return 0;
+
+out_unlock:
+ mutex_unlock(&dev->master_mutex);
+ return ret;
}
/*
minor->type = type;
minor->dev = dev;
- INIT_LIST_HEAD(&minor->master_list);
*drm_minor_get_slot(dev, type) = minor;
return 0;
}
EXPORT_SYMBOL(drm_unplug_dev);
+/*
+ * DRM internal mount
+ * We want to be able to allocate our own "struct address_space" to control
+ * memory-mappings in VRAM (or stolen RAM, ...). However, core MM does not allow
+ * stand-alone address_space objects, so we need an underlying inode. As there
+ * is no way to allocate an independent inode easily, we need a fake internal
+ * VFS mount-point.
+ *
+ * The drm_fs_inode_new() function allocates a new inode, drm_fs_inode_free()
+ * frees it again. You are allowed to use iget() and iput() to get references to
+ * the inode. But each drm_fs_inode_new() call must be paired with exactly one
+ * drm_fs_inode_free() call (which does not have to be the last iput()).
+ * We use drm_fs_inode_*() to manage our internal VFS mount-point and share it
+ * between multiple inode-users. You could, technically, call
+ * iget() + drm_fs_inode_free() directly after alloc and sometime later do an
+ * iput(), but this way you'd end up with a new vfsmount for each inode.
+ */
+
+static int drm_fs_cnt;
+static struct vfsmount *drm_fs_mnt;
+
+static const struct dentry_operations drm_fs_dops = {
+ .d_dname = simple_dname,
+};
+
+static const struct super_operations drm_fs_sops = {
+ .statfs = simple_statfs,
+};
+
+static struct dentry *drm_fs_mount(struct file_system_type *fs_type, int flags,
+ const char *dev_name, void *data)
+{
+ return mount_pseudo(fs_type,
+ "drm:",
+ &drm_fs_sops,
+ &drm_fs_dops,
+ 0x010203ff);
+}
+
+static struct file_system_type drm_fs_type = {
+ .name = "drm",
+ .owner = THIS_MODULE,
+ .mount = drm_fs_mount,
+ .kill_sb = kill_anon_super,
+};
+
+static struct inode *drm_fs_inode_new(void)
+{
+ struct inode *inode;
+ int r;
+
+ r = simple_pin_fs(&drm_fs_type, &drm_fs_mnt, &drm_fs_cnt);
+ if (r < 0) {
+ DRM_ERROR("Cannot mount pseudo fs: %d\n", r);
+ return ERR_PTR(r);
+ }
+
+ inode = alloc_anon_inode(drm_fs_mnt->mnt_sb);
+ if (IS_ERR(inode))
+ simple_release_fs(&drm_fs_mnt, &drm_fs_cnt);
+
+ return inode;
+}
+
+static void drm_fs_inode_free(struct inode *inode)
+{
+ if (inode) {
+ iput(inode);
+ simple_release_fs(&drm_fs_mnt, &drm_fs_cnt);
+ }
+}
+
/**
* drm_dev_alloc - Allocate new drm device
* @driver: DRM driver to allocate device for
spin_lock_init(&dev->event_lock);
mutex_init(&dev->struct_mutex);
mutex_init(&dev->ctxlist_mutex);
+ mutex_init(&dev->master_mutex);
+
+ dev->anon_inode = drm_fs_inode_new();
+ if (IS_ERR(dev->anon_inode)) {
+ ret = PTR_ERR(dev->anon_inode);
+ DRM_ERROR("Cannot allocate anonymous inode: %d\n", ret);
+ goto err_free;
+ }
if (drm_core_check_feature(dev, DRIVER_MODESET)) {
ret = drm_minor_alloc(dev, DRM_MINOR_CONTROL);
drm_minor_free(dev, DRM_MINOR_LEGACY);
drm_minor_free(dev, DRM_MINOR_RENDER);
drm_minor_free(dev, DRM_MINOR_CONTROL);
+ drm_fs_inode_free(dev->anon_inode);
+err_free:
+ mutex_destroy(&dev->master_mutex);
kfree(dev);
return NULL;
}
drm_ctxbitmap_cleanup(dev);
drm_ht_remove(&dev->map_hash);
+ drm_fs_inode_free(dev->anon_inode);
drm_minor_free(dev, DRM_MINOR_LEGACY);
drm_minor_free(dev, DRM_MINOR_RENDER);
drm_minor_free(dev, DRM_MINOR_CONTROL);
kfree(dev->devname);
+
+ mutex_destroy(&dev->master_mutex);
kfree(dev);
}
projects / deliverable / linux.git / blobdiff