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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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20
drivers/gpu/drm/drm_bufs.c
View File

@@ -54,9 +54,9 @@ static struct drm_map_list *drm_find_matching_map(struct drm_device *dev,
{
struct drm_map_list *entry;
list_for_each_entry(entry, &dev->maplist, head) {
if (entry->map && map->type == entry->map->type &&
if (entry->map && (entry->master == dev->primary->master) && (map->type == entry->map->type) &&
((entry->map->offset == map->offset) ||
(map->type == _DRM_SHM && map->flags==_DRM_CONTAINS_LOCK))) {
((map->type == _DRM_SHM) && (map->flags&_DRM_CONTAINS_LOCK)))) {
return entry;
}
}
@@ -210,12 +210,12 @@ static int drm_addmap_core(struct drm_device * dev, unsigned int offset,
map->offset = (unsigned long)map->handle;
if (map->flags & _DRM_CONTAINS_LOCK) {
/* Prevent a 2nd X Server from creating a 2nd lock */
if (dev->lock.hw_lock != NULL) {
if (dev->primary->master->lock.hw_lock != NULL) {
vfree(map->handle);
drm_free(map, sizeof(*map), DRM_MEM_MAPS);
return -EBUSY;
}
dev->sigdata.lock = dev->lock.hw_lock = map->handle; /* Pointer to lock */
dev->sigdata.lock = dev->primary->master->lock.hw_lock = map->handle; /* Pointer to lock */
}
break;
case _DRM_AGP: {
@@ -319,6 +319,7 @@ static int drm_addmap_core(struct drm_device * dev, unsigned int offset,
list->user_token = list->hash.key << PAGE_SHIFT;
mutex_unlock(&dev->struct_mutex);
list->master = dev->primary->master;
*maplist = list;
return 0;
}
@@ -345,7 +346,7 @@ int drm_addmap_ioctl(struct drm_device *dev, void *data,
struct drm_map_list *maplist;
int err;
if (!(capable(CAP_SYS_ADMIN) || map->type == _DRM_AGP))
if (!(capable(CAP_SYS_ADMIN) || map->type == _DRM_AGP || map->type == _DRM_SHM))
return -EPERM;
err = drm_addmap_core(dev, map->offset, map->size, map->type,
@@ -380,10 +381,12 @@ int drm_rmmap_locked(struct drm_device *dev, drm_local_map_t *map)
struct drm_map_list *r_list = NULL, *list_t;
drm_dma_handle_t dmah;
int found = 0;
struct drm_master *master;
/* Find the list entry for the map and remove it */
list_for_each_entry_safe(r_list, list_t, &dev->maplist, head) {
if (r_list->map == map) {
master = r_list->master;
list_del(&r_list->head);
drm_ht_remove_key(&dev->map_hash,
r_list->user_token >> PAGE_SHIFT);
@@ -409,6 +412,13 @@ int drm_rmmap_locked(struct drm_device *dev, drm_local_map_t *map)
break;
case _DRM_SHM:
vfree(map->handle);
if (master) {
if (dev->sigdata.lock == master->lock.hw_lock)
dev->sigdata.lock = NULL;
master->lock.hw_lock = NULL; /* SHM removed */
master->lock.file_priv = NULL;
wake_up_interruptible(&master->lock.lock_queue);
}
break;
case _DRM_AGP:
case _DRM_SCATTER_GATHER: