[FreeBSD] Convert to using cdevpriv for file_priv tracking

bsd-core/drmP.h

@@ -37,7 +37,7 @@
 #if defined(_KERNEL) || defined(__KERNEL__)
 
 struct drm_device;
-typedef struct drm_file drm_file_t;
+struct drm_file;
 
 #include <sys/param.h>
 #include <sys/queue.h>
@@ -412,12 +412,12 @@ typedef struct drm_buf_entry {
 typedef TAILQ_HEAD(drm_file_list, drm_file) drm_file_list_t;
 struct drm_file {
 	TAILQ_ENTRY(drm_file) link;
+	struct drm_device *dev;
 	int		  authenticated;
 	int		  master;
 	int		  minor;
 	pid_t		  pid;
 	uid_t		  uid;
-	int		  refs;
 	drm_magic_t	  magic;
 	unsigned long	  ioctl_count;
 	void		 *driver_priv;
@@ -551,9 +551,9 @@ struct drm_ati_pcigart_info {
 struct drm_driver_info {
 	int	(*load)(struct drm_device *, unsigned long flags);
 	int	(*firstopen)(struct drm_device *);
-	int	(*open)(struct drm_device *, drm_file_t *);
+	int	(*open)(struct drm_device *, struct drm_file *);
 	void	(*preclose)(struct drm_device *, struct drm_file *file_priv);
-	void	(*postclose)(struct drm_device *, drm_file_t *);
+	void	(*postclose)(struct drm_device *, struct drm_file *);
 	void	(*lastclose)(struct drm_device *);
 	int	(*unload)(struct drm_device *);
 	void	(*reclaim_buffers_locked)(struct drm_device *,
@@ -728,10 +728,10 @@ extern int	drm_debug_flag;
 /* Device setup support (drm_drv.c) */
 int	drm_probe(device_t nbdev, drm_pci_id_list_t *idlist);
 int	drm_attach(device_t nbdev, drm_pci_id_list_t *idlist);
+void	drm_close(void *data);
 int	drm_detach(device_t nbdev);
 d_ioctl_t drm_ioctl;
 d_open_t drm_open;
-d_close_t drm_close;
 d_read_t drm_read;
 d_poll_t drm_poll;
 d_mmap_t drm_mmap;
@@ -741,8 +741,6 @@ extern drm_local_map_t	*drm_getsarea(struct drm_device *dev);
 extern int		drm_open_helper(struct cdev *kdev, int flags, int fmt,
 					 DRM_STRUCTPROC *p,
 					struct drm_device *dev);
-extern drm_file_t	*drm_find_file_by_proc(struct drm_device *dev,
-					       DRM_STRUCTPROC *p);
 
 /* Memory management support (drm_memory.c) */
 void	drm_mem_init(void);
@@ -874,7 +872,7 @@ int	drm_noop(struct drm_device *dev, void *data,
 int	drm_resctx(struct drm_device *dev, void *data,
 		   struct drm_file *file_priv);
 int	drm_addctx(struct drm_device *dev, void *data,
-struct drm_file *file_priv);
+		   struct drm_file *file_priv);
 int	drm_modctx(struct drm_device *dev, void *data,
 		   struct drm_file *file_priv);
 int	drm_getctx(struct drm_device *dev, void *data,
@@ -929,7 +927,8 @@ int	drm_mapbufs(struct drm_device *dev, void *data,
 int	drm_dma(struct drm_device *dev, void *data, struct drm_file *file_priv);
 
 /* IRQ support (drm_irq.c) */
-int	drm_control(struct drm_device *dev, void *data, struct drm_file *file_priv);
+int	drm_control(struct drm_device *dev, void *data,
+		    struct drm_file *file_priv);
 int	drm_wait_vblank(struct drm_device *dev, void *data,
 			struct drm_file *file_priv);
 void	drm_locked_tasklet(struct drm_device *dev,

bsd-core/drm_auth.c

@@ -43,7 +43,7 @@ static int drm_hash_magic(drm_magic_t magic)
 /**
  * Returns the file private associated with the given magic number.
  */
-static drm_file_t *drm_find_file(struct drm_device *dev, drm_magic_t magic)
+static struct drm_file *drm_find_file(struct drm_device *dev, drm_magic_t magic)
 {
 	drm_magic_entry_t *pt;
 	int hash = drm_hash_magic(magic);
@@ -63,7 +63,7 @@ static drm_file_t *drm_find_file(struct drm_device *dev, drm_magic_t magic)
  * Inserts the given magic number into the hash table of used magic number
  * lists.
  */
-static int drm_add_magic(struct drm_device *dev, drm_file_t *priv,
+static int drm_add_magic(struct drm_device *dev, struct drm_file *priv,
 			 drm_magic_t magic)
 {
 	int		  hash;
@@ -169,7 +169,7 @@ int drm_authmagic(struct drm_device *dev, void *data,
 		  struct drm_file *file_priv)
 {
 	struct drm_auth *auth = data;
-	drm_file_t *priv;
+	struct drm_file *priv;
 
 	DRM_DEBUG("%u\n", auth->magic);
 

bsd-core/drm_drv.c

@@ -123,7 +123,6 @@ static drm_ioctl_desc_t		  drm_ioctls[256] = {
 static struct cdevsw drm_cdevsw = {
 	.d_version =	D_VERSION,
 	.d_open =	drm_open,
-	.d_close =	drm_close,
 	.d_read =	drm_read,
 	.d_ioctl =	drm_ioctl,
 	.d_poll =	drm_poll,
@@ -553,26 +552,16 @@ int drm_open(struct cdev *kdev, int flags, int fmt, DRM_STRUCTPROC *p)
 	return retcode;
 }
 
-int drm_close(struct cdev *kdev, int flags, int fmt, DRM_STRUCTPROC *p)
+void drm_close(void *data)
 {
-	struct drm_device *dev = drm_get_device_from_kdev(kdev);
-	drm_file_t *file_priv;
+	struct drm_file *file_priv = data;
+	struct drm_device *dev = file_priv->dev;
 	int retcode = 0;
 
 	DRM_DEBUG("open_count = %d\n", dev->open_count);
 
 	DRM_LOCK();
 
-	file_priv = drm_find_file_by_proc(dev, p);
-	if (!file_priv) {
-		DRM_UNLOCK();
-		DRM_ERROR("can't find authenticator\n");
-		return EINVAL;
-	}
-
-	if (--file_priv->refs != 0)
-		goto done;
-
 	if (dev->driver->preclose != NULL)
 		dev->driver->preclose(dev, file_priv);
 
@@ -640,7 +629,6 @@ int drm_close(struct cdev *kdev, int flags, int fmt, DRM_STRUCTPROC *p)
 	 * End inline drm_release
 	 */
 
-done:
 	atomic_inc(&dev->counts[_DRM_STAT_CLOSES]);
 	device_unbusy(dev->device);
 	if (--dev->open_count == 0) {
@@ -648,8 +636,6 @@ done:
 	}
 
 	DRM_UNLOCK();
-	
-	return retcode;
 }
 
 /* drm_ioctl is called whenever a process performs an ioctl on /dev/drm.
@@ -663,12 +649,12 @@ int drm_ioctl(struct cdev *kdev, u_long cmd, caddr_t data, int flags,
 	int (*func)(struct drm_device *dev, void *data, struct drm_file *file_priv);
 	int nr = DRM_IOCTL_NR(cmd);
 	int is_driver_ioctl = 0;
-	drm_file_t *file_priv;
+	struct drm_file *file_priv;
 
 	DRM_LOCK();
-	file_priv = drm_find_file_by_proc(dev, p);
+	retcode = devfs_get_cdevpriv((void **)&file_priv);
 	DRM_UNLOCK();
-	if (file_priv == NULL) {
+	if (retcode != 0) {
 		DRM_ERROR("can't find authenticator\n");
 		return EINVAL;
 	}

bsd-core/drm_fops.c

@@ -36,26 +36,12 @@
 
 #include "drmP.h"
 
-drm_file_t *drm_find_file_by_proc(struct drm_device *dev, DRM_STRUCTPROC *p)
-{
-	uid_t uid = p->td_ucred->cr_svuid;
-	pid_t pid = p->td_proc->p_pid;
-	drm_file_t *priv;
-
-	DRM_SPINLOCK_ASSERT(&dev->dev_lock);
-
-	TAILQ_FOREACH(priv, &dev->files, link)
-		if (priv->pid == pid && priv->uid == uid)
-			return priv;
-	return NULL;
-}
-
 /* drm_open_helper is called whenever a process opens /dev/drm. */
 int drm_open_helper(struct cdev *kdev, int flags, int fmt, DRM_STRUCTPROC *p,
 		    struct drm_device *dev)
 {
-	int	     m = minor(kdev);
-	drm_file_t   *priv;
+	struct drm_file *priv;
+	int m = minor(kdev);
 	int retcode;
 
 	if (flags & O_EXCL)
@@ -64,40 +50,42 @@ int drm_open_helper(struct cdev *kdev, int flags, int fmt, DRM_STRUCTPROC *p,
 
 	DRM_DEBUG("pid = %d, minor = %d\n", DRM_CURRENTPID, m);
 
-	DRM_LOCK();
-	priv = drm_find_file_by_proc(dev, p);
-	if (priv) {
-		priv->refs++;
-	} else {
-		priv = malloc(sizeof(*priv), M_DRM, M_NOWAIT | M_ZERO);
-		if (priv == NULL) {
-			DRM_UNLOCK();
-			return ENOMEM;
-		}
-		priv->uid		= p->td_ucred->cr_svuid;
-		priv->pid		= p->td_proc->p_pid;
-		priv->refs		= 1;
-		priv->minor		= m;
-		priv->ioctl_count 	= 0;
-
-		/* for compatibility root is always authenticated */
-		priv->authenticated	= DRM_SUSER(p);
-
-		if (dev->driver->open) {
-			/* shared code returns -errno */
-			retcode = -dev->driver->open(dev, priv);
-			if (retcode != 0) {
-				free(priv, M_DRM);
-				DRM_UNLOCK();
-				return retcode;
-			}
-		}
-
-		/* first opener automatically becomes master */
-		priv->master = TAILQ_EMPTY(&dev->files);
-
-		TAILQ_INSERT_TAIL(&dev->files, priv, link);
+	priv = malloc(sizeof(*priv), M_DRM, M_NOWAIT | M_ZERO);
+	if (priv == NULL) {
+		return ENOMEM;
 	}
+
+	retcode = devfs_set_cdevpriv(priv, drm_close);
+	if (retcode != 0) {
+		free(priv, M_DRM);
+		return retcode;
+	}
+
+	DRM_LOCK();
+	priv->dev		= dev;
+	priv->uid		= p->td_ucred->cr_svuid;
+	priv->pid		= p->td_proc->p_pid;
+	priv->minor		= m;
+	priv->ioctl_count 	= 0;
+
+	/* for compatibility root is always authenticated */
+	priv->authenticated	= DRM_SUSER(p);
+
+	if (dev->driver->open) {
+		/* shared code returns -errno */
+		retcode = -dev->driver->open(dev, priv);
+		if (retcode != 0) {
+			devfs_clear_cdevpriv();
+			free(priv, M_DRM);
+			DRM_UNLOCK();
+			return retcode;
+		}
+	}
+
+	/* first opener automatically becomes master */
+	priv->master = TAILQ_EMPTY(&dev->files);
+
+	TAILQ_INSERT_TAIL(&dev->files, priv, link);
 	DRM_UNLOCK();
 	kdev->si_drv1 = dev;
 	return 0;

bsd-core/drm_ioctl.c

@@ -179,9 +179,9 @@ int drm_getclient(struct drm_device *dev, void *data,
 		  struct drm_file *file_priv)
 {
 	struct drm_client *client = data;
-	drm_file_t   *pt;
-	int          idx;
-	int          i = 0;
+	struct drm_file *pt;
+	int idx;
+	int i = 0;
 
 	idx = client->idx;
 	DRM_LOCK();

bsd-core/drm_sysctl.c

@@ -268,7 +268,7 @@ done:
 static int drm_clients_info DRM_SYSCTL_HANDLER_ARGS
 {
 	struct drm_device *dev = arg1;
-	drm_file_t *priv, *tempprivs;
+	struct drm_file *priv, *tempprivs;
 	char buf[128];
 	int retcode;
 	int privcount, i;
@@ -279,7 +279,7 @@ static int drm_clients_info DRM_SYSCTL_HANDLER_ARGS
 	TAILQ_FOREACH(priv, &dev->files, link)
 		privcount++;
 
-	tempprivs = malloc(sizeof(drm_file_t) * privcount, M_DRM, M_NOWAIT);
+	tempprivs = malloc(sizeof(struct drm_file) * privcount, M_DRM, M_NOWAIT);
 	if (tempprivs == NULL) {
 		DRM_UNLOCK();
 		return ENOMEM;

bsd-core/drm_vm.c

@@ -32,20 +32,20 @@ int drm_mmap(struct cdev *kdev, vm_offset_t offset, vm_paddr_t *paddr,
     int prot)
 {
 	struct drm_device *dev = drm_get_device_from_kdev(kdev);
+	struct drm_file *file_priv;
 	drm_local_map_t *map;
-	drm_file_t *priv;
 	enum drm_map_type type;
 	vm_paddr_t phys;
 
 	DRM_LOCK();
-	priv = drm_find_file_by_proc(dev, DRM_CURPROC);
+	TAILQ_FOREACH(file_priv, &dev->files, link)
+		if (file_priv->pid == curthread->td_proc->p_pid &&
+		    file_priv->uid == curthread->td_ucred->cr_svuid &&
+		    file_priv->authenticated == 1)
+			break;
 	DRM_UNLOCK();
-	if (priv == NULL) {
-		DRM_ERROR("can't find authenticator\n");
-		return EINVAL;
-	}
 
-	if (!priv->authenticated)
+	if (!file_priv)
 		return EACCES;
 
 	if (dev->dma && offset >= 0 && offset < ptoa(dev->dma->page_count)) {