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drm: move to kref per-master structures.

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This is step one towards having multiple masters sharing a drm
device in order to get fast-user-switching to work.

It splits out the information associated with the drm master
into a separate kref counted structure, and allocates this when
a master opens the device node. It also allows the current master
to abdicate (say while VT switched), and a new master to take over
the hardware.

It moves the Intel and radeon drivers to using the sarea from
within the new master structures.

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie
2008-11-28 14:22:24 +10:00
committed by Dave Airlie
parent e7f7ab45eb
commit 7c1c2871a6
21 changed files with 619 additions and 353 deletions
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29
drivers/gpu/drm/drm_auth.c
View File

@@ -45,14 +45,15 @@
* the one with matching magic number, while holding the drm_device::struct_mutex
* lock.
*/
static struct drm_file *drm_find_file(struct drm_device * dev, drm_magic_t magic)
static struct drm_file *drm_find_file(struct drm_master *master, drm_magic_t magic)
{
struct drm_file *retval = NULL;
struct drm_magic_entry *pt;
struct drm_hash_item *hash;
struct drm_device *dev = master->minor->dev;
mutex_lock(&dev->struct_mutex);
if (!drm_ht_find_item(&dev->magiclist, (unsigned long)magic, &hash)) {
if (!drm_ht_find_item(&master->magiclist, (unsigned long)magic, &hash)) {
pt = drm_hash_entry(hash, struct drm_magic_entry, hash_item);
retval = pt->priv;
}
@@ -71,11 +72,11 @@ static struct drm_file *drm_find_file(struct drm_device * dev, drm_magic_t magic
* associated the magic number hash key in drm_device::magiclist, while holding
* the drm_device::struct_mutex lock.
*/
static int drm_add_magic(struct drm_device * dev, struct drm_file * priv,
static int drm_add_magic(struct drm_master *master, struct drm_file *priv,
drm_magic_t magic)
{
struct drm_magic_entry *entry;
struct drm_device *dev = master->minor->dev;
DRM_DEBUG("%d\n", magic);
entry = drm_alloc(sizeof(*entry), DRM_MEM_MAGIC);
@@ -83,11 +84,10 @@ static int drm_add_magic(struct drm_device * dev, struct drm_file * priv,
return -ENOMEM;
memset(entry, 0, sizeof(*entry));
entry->priv = priv;
entry->hash_item.key = (unsigned long)magic;
mutex_lock(&dev->struct_mutex);
drm_ht_insert_item(&dev->magiclist, &entry->hash_item);
list_add_tail(&entry->head, &dev->magicfree);
drm_ht_insert_item(&master->magiclist, &entry->hash_item);
list_add_tail(&entry->head, &master->magicfree);
mutex_unlock(&dev->struct_mutex);
return 0;
@@ -102,20 +102,21 @@ static int drm_add_magic(struct drm_device * dev, struct drm_file * priv,
* Searches and unlinks the entry in drm_device::magiclist with the magic
* number hash key, while holding the drm_device::struct_mutex lock.
*/
static int drm_remove_magic(struct drm_device * dev, drm_magic_t magic)
static int drm_remove_magic(struct drm_master *master, drm_magic_t magic)
{
struct drm_magic_entry *pt;
struct drm_hash_item *hash;
struct drm_device *dev = master->minor->dev;
DRM_DEBUG("%d\n", magic);
mutex_lock(&dev->struct_mutex);
if (drm_ht_find_item(&dev->magiclist, (unsigned long)magic, &hash)) {
if (drm_ht_find_item(&master->magiclist, (unsigned long)magic, &hash)) {
mutex_unlock(&dev->struct_mutex);
return -EINVAL;
}
pt = drm_hash_entry(hash, struct drm_magic_entry, hash_item);
drm_ht_remove_item(&dev->magiclist, hash);
drm_ht_remove_item(&master->magiclist, hash);
list_del(&pt->head);
mutex_unlock(&dev->struct_mutex);
@@ -153,9 +154,9 @@ int drm_getmagic(struct drm_device *dev, void *data, struct drm_file *file_priv)
++sequence; /* reserve 0 */
auth->magic = sequence++;
spin_unlock(&lock);
} while (drm_find_file(dev, auth->magic));
} while (drm_find_file(file_priv->master, auth->magic));
file_priv->magic = auth->magic;
drm_add_magic(dev, file_priv, auth->magic);
drm_add_magic(file_priv->master, file_priv, auth->magic);
}
DRM_DEBUG("%u\n", auth->magic);
@@ -181,9 +182,9 @@ int drm_authmagic(struct drm_device *dev, void *data,
struct drm_file *file;
DRM_DEBUG("%u\n", auth->magic);
if ((file = drm_find_file(dev, auth->magic))) {
if ((file = drm_find_file(file_priv->master, auth->magic))) {
file->authenticated = 1;
drm_remove_magic(dev, auth->magic);
drm_remove_magic(file_priv->master, auth->magic);
return 0;
}
return -EINVAL;