[PATCH v5 10/10] gna: add open and close operations on GNA device

[Maciej Kwapulinski]

From: Tomasz Jankowski <tomasz1.jankow...@intel.com>

Signed-off-by: Tomasz Jankowski <tomasz1.jankow...@intel.com>
Tested-by: Mikolaj Grzybowski <mikolajx.grzybow...@intel.com>
Co-developed-by: Jianxun Zhang <jianxun.zh...@linux.intel.com>
Signed-off-by: Jianxun Zhang <jianxun.zh...@linux.intel.com>
Co-developed-by: Maciej Kwapulinski <maciej.kwapulin...@linux.intel.com>
Signed-off-by: Maciej Kwapulinski <maciej.kwapulin...@linux.intel.com>
---
 drivers/gpu/drm/gna/gna_device.c | 46 ++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)

diff --git a/drivers/gpu/drm/gna/gna_device.c b/drivers/gpu/drm/gna/gna_device.c
index aee409e3b4ea..4ce08bf313c3 100644
--- a/drivers/gpu/drm/gna/gna_device.c
+++ b/drivers/gpu/drm/gna/gna_device.c
@@ -58,6 +58,49 @@ const struct dev_pm_ops __maybe_unused gna_pm = {
        SET_RUNTIME_PM_OPS(gna_runtime_suspend, gna_runtime_resume, NULL)
 };
 
+static int gna_open(struct drm_device *dev, struct drm_file *file)
+{
+       struct gna_device *gna_priv;
+
+       gna_priv = to_gna_device(dev);
+
+       file->driver_priv = gna_priv;
+
+       return 0;
+}
+
+static void gna_delete_file_requests(struct drm_file *file, struct gna_device 
*gna_priv)
+{
+       struct gna_request *req, *temp_req;
+       struct list_head *reqs_list;
+
+       mutex_lock(&gna_priv->reqlist_lock);
+
+       reqs_list = &gna_priv->request_list;
+       if (!list_empty(reqs_list)) {
+               list_for_each_entry_safe(req, temp_req, reqs_list, node) {
+                       if (req->drm_f == file) {
+                               bool is_pending;
+
+                               list_del_init(&req->node);
+                               is_pending = cancel_work_sync(&req->work);
+                               if (is_pending)
+                                       
atomic_dec(&gna_priv->enqueued_requests);
+                               kref_put(&req->refcount, gna_request_release);
+                               break;
+                       }
+               }
+       }
+
+       mutex_unlock(&gna_priv->reqlist_lock);
+}
+
+static void gna_close(struct drm_device *dev, struct drm_file *file)
+{
+       struct gna_device *gna_priv = (struct gna_device *)file->driver_priv;
+
+       gna_delete_file_requests(file, gna_priv);
+}
 
 static void gna_drm_dev_fini(struct drm_device *dev, void *ptr)
 {
@@ -136,6 +179,9 @@ static struct drm_gem_object *gna_create_gem_object(struct 
drm_device *dev,
 
 static const struct drm_driver gna_drm_driver = {
        .driver_features = DRIVER_GEM | DRIVER_RENDER,
+       .open = gna_open,
+       .postclose = gna_close,
+
        .gem_create_object = gna_create_gem_object,
 
        .ioctls = gna_drm_ioctls,
-- 
2.25.1