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drm/xe: Add ref counting for xe_file

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Add ref counting for xe_file.

v2:
- Add kernel doc for exported functions (Matt)
- Instead of xe_file_destroy, export the get/put helpers (Lucas)

v3: Fixup the kernel-doc format and description (Matt, Lucas)

Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240718210548.3580382-3-umesh.nerlige.ramappa@intel.com
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
This commit is contained in:
Umesh Nerlige Ramappa 2024-07-18 14:05:46 -07:00 committed by Lucas De Marchi
parent 3d0c4a62cc
commit ce8c161cba
3 changed files with 37 additions and 2 deletions
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33
drivers/gpu/drm/xe/xe_device.c
View File

@ -90,11 +90,14 @@ static int xe_file_open(struct drm_device *dev, struct drm_file *file)
spin_unlock(&xe->clients.lock); spin_unlock(&xe->clients.lock);
file->driver_priv = xef; file->driver_priv = xef;
kref_init(&xef->refcount);
return 0; return 0;
} }
static void xe_file_destroy(struct xe_file *xef) static void xe_file_destroy(struct kref *ref)
{ {
struct xe_file *xef = container_of(ref, struct xe_file, refcount);
struct xe_device *xe = xef->xe; struct xe_device *xe = xef->xe;
xa_destroy(&xef->exec_queue.xa); xa_destroy(&xef->exec_queue.xa);
@ -110,6 +113,32 @@ static void xe_file_destroy(struct xe_file *xef)
kfree(xef); kfree(xef);
} }
/**
* xe_file_get() - Take a reference to the xe file object
* @xef: Pointer to the xe file
*
* Anyone with a pointer to xef must take a reference to the xe file
* object using this call.
*
* Return: xe file pointer
*/
struct xe_file *xe_file_get(struct xe_file *xef)
{
kref_get(&xef->refcount);
return xef;
}
/**
* xe_file_put() - Drop a reference to the xe file object
* @xef: Pointer to the xe file
*
* Used to drop reference to the xef object
*/
void xe_file_put(struct xe_file *xef)
{
kref_put(&xef->refcount, xe_file_destroy);
}
static void xe_file_close(struct drm_device *dev, struct drm_file *file) static void xe_file_close(struct drm_device *dev, struct drm_file *file)
{ {
struct xe_file *xef = file->driver_priv; struct xe_file *xef = file->driver_priv;
@ -132,7 +161,7 @@ static void xe_file_close(struct drm_device *dev, struct drm_file *file)
xe_vm_close_and_put(vm); xe_vm_close_and_put(vm);
mutex_unlock(&xef->vm.lock); mutex_unlock(&xef->vm.lock);
xe_file_destroy(xef); xe_file_put(xef);
} }
static const struct drm_ioctl_desc xe_ioctls[] = { static const struct drm_ioctl_desc xe_ioctls[] = {

3
drivers/gpu/drm/xe/xe_device.h
View File

@ -171,4 +171,7 @@ static inline bool xe_device_wedged(struct xe_device *xe)
void xe_device_declare_wedged(struct xe_device *xe); void xe_device_declare_wedged(struct xe_device *xe);
struct xe_file *xe_file_get(struct xe_file *xef);
void xe_file_put(struct xe_file *xef);
#endif #endif

3
drivers/gpu/drm/xe/xe_device_types.h
View File

@ -581,6 +581,9 @@ struct xe_file {
/** @client: drm client */ /** @client: drm client */
struct xe_drm_client *client; struct xe_drm_client *client;
/** @refcount: ref count of this xe file */
struct kref refcount;
}; };
#endif #endif