[PATCH 2/2] drm: make unplugged flag specific to udl driver

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Remove the general drm_device_is_unplugged() checks, and move the unplugged
flag handling logic into drm/udl. In general we want to keep driver-specific
logic out of common drm code.

Signed-off-by: Haixia Shi <hshi@xxxxxxxxxxxx>
Reviewed-by: Stéphane Marchesin <marcheu@xxxxxxxxxxxx>
---
 drivers/gpu/drm/drm_drv.c           |  6 ----
 drivers/gpu/drm/drm_fops.c          |  2 --
 drivers/gpu/drm/drm_gem.c           |  3 --
 drivers/gpu/drm/drm_ioctl.c         |  3 --
 drivers/gpu/drm/drm_vm.c            |  3 --
 drivers/gpu/drm/udl/udl_connector.c |  2 +-
 drivers/gpu/drm/udl/udl_drv.c       |  7 +++--
 drivers/gpu/drm/udl/udl_drv.h       |  6 ++++
 drivers/gpu/drm/udl/udl_fb.c        |  2 +-
 drivers/gpu/drm/udl/udl_gem.c       |  5 +++
 drivers/gpu/drm/udl/udl_main.c      | 61 +++++++++++++++++++++++++++++++++++++
 include/drm/drmP.h                  | 14 ---------
 12 files changed, 78 insertions(+), 36 deletions(-)

diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index 167c8d3..f93ee12 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -376,9 +376,6 @@ struct drm_minor *drm_minor_acquire(unsigned int minor_id)
 
 	if (!minor) {
 		return ERR_PTR(-ENODEV);
-	} else if (drm_device_is_unplugged(minor->dev)) {
-		drm_dev_unref(minor->dev);
-		return ERR_PTR(-ENODEV);
 	}
 
 	return minor;
@@ -464,9 +461,6 @@ void drm_unplug_dev(struct drm_device *dev)
 	drm_minor_unregister(dev, DRM_MINOR_CONTROL);
 
 	mutex_lock(&drm_global_mutex);
-
-	drm_device_set_unplugged(dev);
-
 	if (dev->open_count == 0) {
 		drm_put_dev(dev);
 	}
diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c
index 1ea8790..b4332d4 100644
--- a/drivers/gpu/drm/drm_fops.c
+++ b/drivers/gpu/drm/drm_fops.c
@@ -497,8 +497,6 @@ int drm_release(struct inode *inode, struct file *filp)
 
 	if (!--dev->open_count) {
 		retcode = drm_lastclose(dev);
-		if (drm_device_is_unplugged(dev))
-			drm_put_dev(dev);
 	}
 	mutex_unlock(&drm_global_mutex);
 
diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index 2e8c77e..c622e32 100644
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -900,9 +900,6 @@ int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
 	struct drm_vma_offset_node *node;
 	int ret;
 
-	if (drm_device_is_unplugged(dev))
-		return -ENODEV;
-
 	drm_vma_offset_lock_lookup(dev->vma_offset_manager);
 	node = drm_vma_offset_exact_lookup_locked(dev->vma_offset_manager,
 						  vma->vm_pgoff,
diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
index 8ce2a0c..f959074 100644
--- a/drivers/gpu/drm/drm_ioctl.c
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -695,9 +695,6 @@ long drm_ioctl(struct file *filp,
 
 	dev = file_priv->minor->dev;
 
-	if (drm_device_is_unplugged(dev))
-		return -ENODEV;
-
 	is_driver_ioctl = nr >= DRM_COMMAND_BASE && nr < DRM_COMMAND_END;
 
 	if (is_driver_ioctl) {
diff --git a/drivers/gpu/drm/drm_vm.c b/drivers/gpu/drm/drm_vm.c
index f90bd5f..3a68be4 100644
--- a/drivers/gpu/drm/drm_vm.c
+++ b/drivers/gpu/drm/drm_vm.c
@@ -657,9 +657,6 @@ int drm_legacy_mmap(struct file *filp, struct vm_area_struct *vma)
 	struct drm_device *dev = priv->minor->dev;
 	int ret;
 
-	if (drm_device_is_unplugged(dev))
-		return -ENODEV;
-
 	mutex_lock(&dev->struct_mutex);
 	ret = drm_mmap_locked(filp, vma);
 	mutex_unlock(&dev->struct_mutex);
diff --git a/drivers/gpu/drm/udl/udl_connector.c b/drivers/gpu/drm/udl/udl_connector.c
index 4709b54..b168f2c 100644
--- a/drivers/gpu/drm/udl/udl_connector.c
+++ b/drivers/gpu/drm/udl/udl_connector.c
@@ -96,7 +96,7 @@ static int udl_mode_valid(struct drm_connector *connector,
 static enum drm_connector_status
 udl_detect(struct drm_connector *connector, bool force)
 {
-	if (drm_device_is_unplugged(connector->dev))
+	if (udl_device_is_unplugged(connector->dev))
 		return connector_status_disconnected;
 	return connector_status_connected;
 }
diff --git a/drivers/gpu/drm/udl/udl_drv.c b/drivers/gpu/drm/udl/udl_drv.c
index d5728ec..f5c2a97 100644
--- a/drivers/gpu/drm/udl/udl_drv.c
+++ b/drivers/gpu/drm/udl/udl_drv.c
@@ -24,12 +24,12 @@ static const struct vm_operations_struct udl_gem_vm_ops = {
 
 static const struct file_operations udl_driver_fops = {
 	.owner = THIS_MODULE,
-	.open = drm_open,
+	.open = udl_drm_open,
 	.mmap = udl_drm_gem_mmap,
 	.poll = drm_poll,
 	.read = drm_read,
-	.unlocked_ioctl	= drm_ioctl,
-	.release = drm_release,
+	.unlocked_ioctl	= udl_drm_ioctl,
+	.release = udl_drm_release,
 #ifdef CONFIG_COMPAT
 	.compat_ioctl = drm_compat_ioctl,
 #endif
@@ -97,6 +97,7 @@ static void udl_usb_disconnect(struct usb_interface *interface)
 	drm_connector_unplug_all(dev);
 	udl_fbdev_unplug(dev);
 	udl_drop_usb(dev);
+	udl_device_set_unplugged(dev);
 	drm_unplug_dev(dev);
 }
 
diff --git a/drivers/gpu/drm/udl/udl_drv.h b/drivers/gpu/drm/udl/udl_drv.h
index 4a064ef..75aa91c 100644
--- a/drivers/gpu/drm/udl/udl_drv.h
+++ b/drivers/gpu/drm/udl/udl_drv.h
@@ -65,6 +65,7 @@ struct udl_device {
 	atomic_t bytes_identical; /* saved effort with backbuffer comparison */
 	atomic_t bytes_sent; /* to usb, after compression including overhead */
 	atomic_t cpu_kcycles_used; /* transpired during pixel processing */
+	atomic_t unplugged; /* device has been unplugged or gone away */
 };
 
 struct udl_gem_object {
@@ -133,6 +134,9 @@ int udl_gem_get_pages(struct udl_gem_object *obj);
 void udl_gem_put_pages(struct udl_gem_object *obj);
 int udl_gem_vmap(struct udl_gem_object *obj);
 void udl_gem_vunmap(struct udl_gem_object *obj);
+int udl_drm_open(struct inode *inode, struct file *filp);
+int udl_drm_release(struct inode *inode, struct file *filp);
+int udl_drm_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
 int udl_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
 int udl_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf);
 
@@ -140,6 +144,8 @@ int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
 		      int width, int height);
 
 int udl_drop_usb(struct drm_device *dev);
+void udl_device_set_unplugged(struct drm_device *dev);
+int udl_device_is_unplugged(struct drm_device *dev);
 
 #define CMD_WRITE_RAW8   "\xAF\x60" /**< 8 bit raw write command. */
 #define CMD_WRITE_RL8    "\xAF\x61" /**< 8 bit run length command. */
diff --git a/drivers/gpu/drm/udl/udl_fb.c b/drivers/gpu/drm/udl/udl_fb.c
index 200419d..df1d53e 100644
--- a/drivers/gpu/drm/udl/udl_fb.c
+++ b/drivers/gpu/drm/udl/udl_fb.c
@@ -325,7 +325,7 @@ static int udl_fb_open(struct fb_info *info, int user)
 	struct udl_device *udl = dev->dev_private;
 
 	/* If the USB device is gone, we don't accept new opens */
-	if (drm_device_is_unplugged(udl->ddev))
+	if (udl_device_is_unplugged(udl->ddev))
 		return -ENODEV;
 
 	ufbdev->fb_count++;
diff --git a/drivers/gpu/drm/udl/udl_gem.c b/drivers/gpu/drm/udl/udl_gem.c
index 2a0a784..33c302f 100644
--- a/drivers/gpu/drm/udl/udl_gem.c
+++ b/drivers/gpu/drm/udl/udl_gem.c
@@ -86,8 +86,13 @@ int udl_dumb_create(struct drm_file *file,
 
 int udl_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
 {
+	struct drm_file *priv = filp->private_data;
+	struct drm_device *dev = priv->minor->dev;
 	int ret;
 
+	if (udl_device_is_unplugged(dev))
+		return -ENODEV;
+
 	ret = drm_gem_mmap(filp, vma);
 	if (ret)
 		return ret;
diff --git a/drivers/gpu/drm/udl/udl_main.c b/drivers/gpu/drm/udl/udl_main.c
index 33dbfb2..2ba3ee3 100644
--- a/drivers/gpu/drm/udl/udl_main.c
+++ b/drivers/gpu/drm/udl/udl_main.c
@@ -350,3 +350,64 @@ int udl_driver_unload(struct drm_device *dev)
 	kfree(udl);
 	return 0;
 }
+
+int udl_drm_open(struct inode *inode, struct file *filp)
+{
+	struct drm_file *file_priv;
+	struct drm_minor *minor;
+
+	int ret = drm_open(inode, filp);
+	if (ret)
+		return ret;
+
+	file_priv = filp->private_data;
+	minor = file_priv->minor;
+	if (udl_device_is_unplugged(minor->dev)) {
+		drm_dev_unref(minor->dev);
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+int udl_drm_release(struct inode *inode, struct file *filp)
+{
+	struct drm_file *file_priv = filp->private_data;
+	struct drm_device *dev = file_priv->minor->dev;
+
+	int ret = drm_release(inode, filp);
+	if (!dev->open_count && udl_device_is_unplugged(dev))
+		drm_put_dev(dev);
+
+	return ret;
+}
+
+int udl_drm_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+	struct drm_file *file_priv = filp->private_data;
+	struct drm_device *dev = file_priv->minor->dev;
+	unsigned int nr = DRM_IOCTL_NR(cmd);
+
+	if (udl_device_is_unplugged(dev) &&
+		nr != DRM_IOCTL_NR(DRM_IOCTL_MODE_SETCRTC) &&
+		nr != DRM_IOCTL_NR(DRM_IOCTL_MODE_RMFB) &&
+		nr != DRM_IOCTL_NR(DRM_IOCTL_MODE_DESTROY_DUMB))
+		return -ENODEV;
+
+	return drm_ioctl(filp, cmd, arg);
+}
+
+void udl_device_set_unplugged(struct drm_device *dev)
+{
+	struct udl_device *udl = dev->dev_private;
+	smp_wmb();
+	atomic_set(&udl->unplugged, 1);
+}
+
+int udl_device_is_unplugged(struct drm_device *dev)
+{
+	struct udl_device *udl = dev->dev_private;
+	int ret = atomic_read(&udl->unplugged);
+	smp_rmb();
+	return ret;
+}
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index d7162cf..40c6099 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -748,7 +748,6 @@ struct drm_device {
 	struct drm_minor *control;		/**< Control node */
 	struct drm_minor *primary;		/**< Primary node */
 	struct drm_minor *render;		/**< Render node */
-	atomic_t unplugged;			/**< Flag whether dev is dead */
 	struct inode *anon_inode;		/**< inode for private address-space */
 	char *unique;				/**< unique name of the device */
 	/*@} */
@@ -879,19 +878,6 @@ static __inline__ int drm_core_check_feature(struct drm_device *dev,
 	return ((dev->driver->driver_features & feature) ? 1 : 0);
 }
 
-static inline void drm_device_set_unplugged(struct drm_device *dev)
-{
-	smp_wmb();
-	atomic_set(&dev->unplugged, 1);
-}
-
-static inline int drm_device_is_unplugged(struct drm_device *dev)
-{
-	int ret = atomic_read(&dev->unplugged);
-	smp_rmb();
-	return ret;
-}
-
 static inline bool drm_is_render_client(const struct drm_file *file_priv)
 {
 	return file_priv->minor->type == DRM_MINOR_RENDER;
-- 
2.7.0.rc3.207.g0ac5344

_______________________________________________
dri-devel mailing list
dri-devel@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/dri-devel




[Index of Archives]     [Linux DRI Users]     [Linux Intel Graphics]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]
  Powered by Linux