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From: Daniel Vetter <daniel.vetter@ffwll.ch>
To: DRI Development <dri-devel@lists.freedesktop.org>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>,
	Intel Graphics Development <intel-gfx@lists.freedesktop.org>,
	Daniel Vetter <daniel.vetter@intel.com>
Subject: [PATCH 03/14] drm: Link directly from drm_master to drm_device
Date: Tue, 14 Jun 2016 20:50:58 +0200	[thread overview]
Message-ID: <1465930269-7883-4-git-send-email-daniel.vetter@ffwll.ch> (raw)
In-Reply-To: <1465930269-7883-1-git-send-email-daniel.vetter@ffwll.ch>

Master-based auth only exists for the legacy/primary drm_minor, hence
there can only be one per device. The goal here is to untangle the
epic dereference games of minor->master and master->minor which is
just massively confusing.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
---
 drivers/gpu/drm/drm_drv.c      | 6 +++---
 drivers/gpu/drm/drm_fops.c     | 2 +-
 drivers/gpu/drm/drm_internal.h | 2 +-
 include/drm/drmP.h             | 7 +++++--
 4 files changed, 10 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index 8b2582aeaab6..3c01a16bbb77 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -93,7 +93,7 @@ void drm_ut_debug_printk(const char *function_name, const char *format, ...)
 }
 EXPORT_SYMBOL(drm_ut_debug_printk);
 
-struct drm_master *drm_master_create(struct drm_minor *minor)
+struct drm_master *drm_master_create(struct drm_device *dev)
 {
 	struct drm_master *master;
 
@@ -105,7 +105,7 @@ struct drm_master *drm_master_create(struct drm_minor *minor)
 	spin_lock_init(&master->lock.spinlock);
 	init_waitqueue_head(&master->lock.lock_queue);
 	idr_init(&master->magic_map);
-	master->minor = minor;
+	master->dev = dev;
 
 	return master;
 }
@@ -120,7 +120,7 @@ EXPORT_SYMBOL(drm_master_get);
 static void drm_master_destroy(struct kref *kref)
 {
 	struct drm_master *master = container_of(kref, struct drm_master, refcount);
-	struct drm_device *dev = master->minor->dev;
+	struct drm_device *dev = master->dev;
 
 	if (dev->driver->master_destroy)
 		dev->driver->master_destroy(dev, master);
diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c
index 2fd4f42b907a..bfbf1381f55d 100644
--- a/drivers/gpu/drm/drm_fops.c
+++ b/drivers/gpu/drm/drm_fops.c
@@ -185,7 +185,7 @@ int drm_new_set_master(struct drm_device *dev, struct drm_file *fpriv)
 	lockdep_assert_held_once(&dev->master_mutex);
 
 	/* create a new master */
-	fpriv->minor->master = drm_master_create(fpriv->minor);
+	fpriv->minor->master = drm_master_create(fpriv->minor->dev);
 	if (!fpriv->minor->master)
 		return -ENOMEM;
 
diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h
index 56a9b1cf99d7..f5c1d17fa51f 100644
--- a/drivers/gpu/drm/drm_internal.h
+++ b/drivers/gpu/drm/drm_internal.h
@@ -92,7 +92,7 @@ int drm_setmaster_ioctl(struct drm_device *dev, void *data,
 			struct drm_file *file_priv);
 int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
 			 struct drm_file *file_priv);
-struct drm_master *drm_master_create(struct drm_minor *minor);
+struct drm_master *drm_master_create(struct drm_device *dev);
 
 /* drm_debugfs.c */
 #if defined(CONFIG_DEBUG_FS)
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index cd3995d82477..17dcbea4f259 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -379,16 +379,19 @@ struct drm_lock_data {
  * struct drm_master - drm master structure
  *
  * @refcount: Refcount for this master object.
- * @minor: Link back to minor char device we are master for. Immutable.
+ * @dev: Link back to the DRM device
  * @unique: Unique identifier: e.g. busid. Protected by drm_global_mutex.
  * @unique_len: Length of unique field. Protected by drm_global_mutex.
  * @magic_map: Map of used authentication tokens. Protected by struct_mutex.
  * @lock: DRI lock information.
  * @driver_priv: Pointer to driver-private information.
+ *
+ * Note that master structures are only relevant for the legacy/primary device
+ * nodes, hence there can only be one per device, not one per drm_minor.
  */
 struct drm_master {
 	struct kref refcount;
-	struct drm_minor *minor;
+	struct drm_device *dev;
 	char *unique;
 	int unique_len;
 	struct idr magic_map;
-- 
2.8.1

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  parent reply	other threads:[~2016-06-14 18:50 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-14 18:50 [PATCH 00/14] Cruft removal around drm_master Daniel Vetter
2016-06-14 18:50 ` [PATCH 01/14] drm: Nuke legacy maps debugfs files Daniel Vetter
2016-06-15 11:23   ` Chris Wilson
2016-06-15 12:00   ` Emil Velikov
2016-06-14 18:50 ` [PATCH 02/14] drm: Hide hw.lock cleanup in filp->release better Daniel Vetter
2016-06-15 11:26   ` [Intel-gfx] " Chris Wilson
2016-06-15 12:10   ` Emil Velikov
2016-06-14 18:50 ` Daniel Vetter [this message]
2016-06-15 11:29   ` [PATCH 03/14] drm: Link directly from drm_master to drm_device Chris Wilson
2016-06-15 12:50   ` [Intel-gfx] " Emil Velikov
2016-06-15 15:45     ` Daniel Vetter
2016-06-16 20:04       ` Emil Velikov
2016-06-14 18:50 ` [PATCH 04/14] drm: Move master functions into drm_auth.c Daniel Vetter
2016-06-15 11:31   ` Chris Wilson
2016-06-15 15:47     ` Daniel Vetter
2016-06-14 18:51 ` [PATCH 05/14] drm: Extract drm_master_open Daniel Vetter
2016-06-15 11:41   ` [Intel-gfx] " Chris Wilson
2016-06-14 18:51 ` [PATCH 06/14] drm: Extract drm_master_relase Daniel Vetter
2016-06-15 11:43   ` [Intel-gfx] " Chris Wilson
2016-06-16  8:18     ` Daniel Vetter
2016-06-14 18:51 ` [PATCH 07/14] drm: Only do the hw.lock cleanup in master_relase for !MODESET Daniel Vetter
2016-06-15 11:48   ` Chris Wilson
2016-06-15 15:49     ` [Intel-gfx] " Daniel Vetter
2016-06-14 18:51 ` [PATCH 08/14] drm: Move authmagic cleanup into drm_master_release Daniel Vetter
2016-06-15 11:51   ` Chris Wilson
2016-06-14 18:51 ` [PATCH 09/14] drm: Protect authmagic with master_mutex Daniel Vetter
2016-06-15 11:54   ` [Intel-gfx] " Chris Wilson
2016-06-15 15:52     ` Daniel Vetter
2016-06-14 18:51 ` [PATCH 10/14] drm: Mark authmagic ioctls as unlocked Daniel Vetter
2016-06-15 11:55   ` [Intel-gfx] " Chris Wilson
2016-06-14 18:51 ` [PATCH 11/14] drm: Mark set/drop master ioctl " Daniel Vetter
2016-06-15 11:56   ` [Intel-gfx] " Chris Wilson
2016-06-14 18:51 ` [PATCH 12/14] drm: Move master pointer from drm_minor to drm_device Daniel Vetter
2016-06-15 12:10   ` [Intel-gfx] " Chris Wilson
2016-06-15 16:01     ` Daniel Vetter
2016-06-15 16:33       ` Chris Wilson
2016-06-15 19:54         ` [Intel-gfx] " Daniel Vetter
2016-06-14 18:51 ` [PATCH 13/14] drm: Clean up drm_crtc.h Daniel Vetter
2016-06-14 18:51 ` [PATCH 14/14] drm: Use dev->name as fallback for dev->unique Daniel Vetter
2016-06-15  5:42 ` ✓ Ro.CI.BAT: success for Cruft removal around drm_master Patchwork

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