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drm: add drm_dev_alloc() helper 

Instead of managing device allocation+initialization in each bus-driver,
we should do that in a central place. drm_fill_in_dev() already does most
of it, but also requires the global drm lock for partial AGP device
registration.

Split both apart so we have a clean device initialization/allocation
phase, and a registration phase.

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
David Herrmann 2013-10-02 11:23:34 +02:00 committed by Dave Airlie
parent 16eb5f4379
commit 1bb72532ac
5 changed files with 80 additions and 57 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/gpu/drm/drm_pci.c
View File

@ -322,7 +322,7 @@ int drm_get_pci_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
DRM_DEBUG("\n");
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
dev = drm_dev_alloc(driver, &pdev->dev);
if (!dev)
return -ENOMEM;
@ -331,8 +331,6 @@ int drm_get_pci_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
goto err_g1;
dev->pdev = pdev;
dev->dev = &pdev->dev;
dev->pci_device = pdev->device;
dev->pci_vendor = pdev->vendor;

3
drivers/gpu/drm/drm_platform.c
View File

@ -47,12 +47,11 @@ static int drm_get_platform_dev(struct platform_device *platdev,
DRM_DEBUG("\n");
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
dev = drm_dev_alloc(driver, &platdev->dev);
if (!dev)
return -ENOMEM;
dev->platformdev = platdev;
dev->dev = &platdev->dev;
mutex_lock(&drm_global_mutex);

121
drivers/gpu/drm/drm_stub.c
View File

@ -260,60 +260,15 @@ int drm_fill_in_dev(struct drm_device *dev,
{
int retcode;
INIT_LIST_HEAD(&dev->filelist);
INIT_LIST_HEAD(&dev->ctxlist);
INIT_LIST_HEAD(&dev->vmalist);
INIT_LIST_HEAD(&dev->maplist);
INIT_LIST_HEAD(&dev->vblank_event_list);
spin_lock_init(&dev->count_lock);
spin_lock_init(&dev->event_lock);
mutex_init(&dev->struct_mutex);
mutex_init(&dev->ctxlist_mutex);
if (drm_ht_create(&dev->map_hash, 12)) {
return -ENOMEM;
}
/* the DRM has 6 basic counters */
dev->counters = 6;
dev->types[0] = _DRM_STAT_LOCK;
dev->types[1] = _DRM_STAT_OPENS;
dev->types[2] = _DRM_STAT_CLOSES;
dev->types[3] = _DRM_STAT_IOCTLS;
dev->types[4] = _DRM_STAT_LOCKS;
dev->types[5] = _DRM_STAT_UNLOCKS;
dev->driver = driver;
if (dev->driver->bus->agp_init) {
retcode = dev->driver->bus->agp_init(dev);
if (retcode)
goto error_out_unreg;
}
retcode = drm_ctxbitmap_init(dev);
if (retcode) {
DRM_ERROR("Cannot allocate memory for context bitmap.\n");
goto error_out_unreg;
}
if (driver->driver_features & DRIVER_GEM) {
retcode = drm_gem_init(dev);
if (retcode) {
DRM_ERROR("Cannot initialize graphics execution "
"manager (GEM)\n");
goto error_out_unreg;
drm_lastclose(dev);
return retcode;
}
}
return 0;
error_out_unreg:
drm_lastclose(dev);
return retcode;
}
EXPORT_SYMBOL(drm_fill_in_dev);
@ -490,3 +445,75 @@ void drm_unplug_dev(struct drm_device *dev)
mutex_unlock(&drm_global_mutex);
}
EXPORT_SYMBOL(drm_unplug_dev);
/**
* drm_dev_alloc - Allocate new drm device
* @driver: DRM driver to allocate device for
* @parent: Parent device object
*
* Allocate and initialize a new DRM device. No device registration is done.
*
* RETURNS:
* Pointer to new DRM device, or NULL if out of memory.
*/
struct drm_device *drm_dev_alloc(struct drm_driver *driver,
struct device *parent)
{
struct drm_device *dev;
int ret;
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev)
return NULL;
dev->dev = parent;
dev->driver = driver;
INIT_LIST_HEAD(&dev->filelist);
INIT_LIST_HEAD(&dev->ctxlist);
INIT_LIST_HEAD(&dev->vmalist);
INIT_LIST_HEAD(&dev->maplist);
INIT_LIST_HEAD(&dev->vblank_event_list);
spin_lock_init(&dev->count_lock);
spin_lock_init(&dev->event_lock);
mutex_init(&dev->struct_mutex);
mutex_init(&dev->ctxlist_mutex);
/* the DRM has 6 basic counters */
dev->counters = 6;
dev->types[0] = _DRM_STAT_LOCK;
dev->types[1] = _DRM_STAT_OPENS;
dev->types[2] = _DRM_STAT_CLOSES;
dev->types[3] = _DRM_STAT_IOCTLS;
dev->types[4] = _DRM_STAT_LOCKS;
dev->types[5] = _DRM_STAT_UNLOCKS;
if (drm_ht_create(&dev->map_hash, 12))
goto err_free;
ret = drm_ctxbitmap_init(dev);
if (ret) {
DRM_ERROR("Cannot allocate memory for context bitmap.\n");
goto err_ht;
}
if (driver->driver_features & DRIVER_GEM) {
ret = drm_gem_init(dev);
if (ret) {
DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n");
goto err_ctxbitmap;
}
}
return dev;
err_ctxbitmap:
drm_ctxbitmap_cleanup(dev);
err_ht:
drm_ht_remove(&dev->map_hash);
err_free:
kfree(dev);
return NULL;
}
EXPORT_SYMBOL(drm_dev_alloc);

7
drivers/gpu/drm/drm_usb.c
View File

@ -7,18 +7,15 @@ int drm_get_usb_dev(struct usb_interface *interface,
struct drm_driver *driver)
{
struct drm_device *dev;
struct usb_device *usbdev;
int ret;
DRM_DEBUG("\n");
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
dev = drm_dev_alloc(driver, &interface->dev);
if (!dev)
return -ENOMEM;
usbdev = interface_to_usbdev(interface);
dev->usbdev = usbdev;
dev->dev = &interface->dev;
dev->usbdev = interface_to_usbdev(interface);
mutex_lock(&drm_global_mutex);

2
include/drm/drmP.h
View File

@ -1643,6 +1643,8 @@ static __inline__ void drm_core_dropmap(struct drm_local_map *map)
extern int drm_fill_in_dev(struct drm_device *dev,
const struct pci_device_id *ent,
struct drm_driver *driver);
struct drm_device *drm_dev_alloc(struct drm_driver *driver,
struct device *parent);
int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type);
/*@}*/