Home | History | Annotate | Line # | Download | only in drm
drm_lease.c revision 1.1 
      1 /*	$NetBSD: drm_lease.c,v 1.1 2021/12/19 00:26:09 riastradh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2018 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Taylor R. Campbell.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: drm_lease.c,v 1.1 2021/12/19 00:26:09 riastradh Exp $");
     34 
     35 #include <drm/drm_lease.h>
     36 
     37 /*
     38  * drm_lease_owner(master)
     39  *
     40  *	Return the root of the lease tree, following parent pointers up
     41  *	from master.
     42  */
     43 struct drm_master *
     44 drm_lease_owner(struct drm_master *master)
     45 {
     46 	struct drm_master *lessor;
     47 
     48 	while ((lessor = master->lessor) != NULL)
     49 		master = lessor;
     50 
     51 	return master;
     52 }
     53 
     54 /*
     55  * drm_lease_held(file, id)
     56  *
     57  *	XXX
     58  */
     59 bool
     60 drm_lease_held(struct drm_file *file, int id)
     61 {
     62 	struct drm_master *master;
     63 	bool held;
     64 
     65 	if (file == NULL || (master = file->master) == NULL)
     66 		return true;
     67 
     68 	mutex_lock(&master->dev->mode_config.idr_mutex);
     69 	held = _drm_lease_held(file, id);
     70 	mutex_unlock(&master->dev->mode_config.idr_mutex);
     71 
     72 	return held;
     73 }
     74 
     75 /*
     76  * _drm_lease_held(file, id)
     77  *
     78  *	Same as drm_lease_held but caller must hold file's root
     79  *	master's dev->mode_config.idr_mutex.
     80  */
     81 bool
     82 _drm_lease_held(struct drm_file *file, int id)
     83 {
     84 	panic("%s: not yet implemented", __func__);
     85 }
     86 
     87 /*
     88  * drm_lease_revoke(master)
     89  *
     90  *	XXX
     91  */
     92 void
     93 drm_lease_revoke(struct drm_master *master)
     94 {
     95 	panic("%s: not yet implemented", __func__);
     96 }
     97 
     98 /*
     99  * drm_lease_filter_crtcs(file, crtcs)
    100  *
    101  *	XXX
    102  */
    103 uint32_t
    104 drm_lease_filter_crtcs(struct drm_file *file, uint32_t crtcs)
    105 {
    106 	panic("%s: not yet implemented", __func__);
    107 }
    108 
    109 /*
    110  * drm_mode_create_lease_ioctl(dev, data, file)
    111  *
    112  *	DRM_IOCTL_MODE_CREATE_LEASE(struct drm_mode_create_lease) ioctl
    113  *	implementation.
    114  */
    115 int
    116 drm_mode_create_lease_ioctl(struct drm_device *dev, void *data,
    117     struct drm_file *file)
    118 {
    119 	struct drm_mode_create_lease *args __unused = data;
    120 
    121 	/* XXX not yet implemented */
    122 	return -ENODEV;
    123 }
    124 
    125 /*
    126  * drm_mode_get_lease_ioctl(dev, data, file)
    127  *
    128  *	DRM_IOCTL_MODE_GET_LEASE(struct drm_mode_get_lease) ioctl
    129  *	implementation.
    130  */
    131 int
    132 drm_mode_get_lease_ioctl(struct drm_device *dev, void *data,
    133     struct drm_file *file)
    134 {
    135 	struct drm_mode_get_lease *args __unused = data;
    136 
    137 	/* XXX not yet implemented */
    138 	return -ENODEV;
    139 }
    140 
    141 /*
    142  * drm_mode_list_leases_ioctl(dev, data, file)
    143  *
    144  *	DRM_IOCTL_MODE_LIST_LEASES(struct drm_mode_list_leases) ioctl
    145  *	implementation.
    146  */
    147 int
    148 drm_mode_list_leases_ioctl(struct drm_device *dev, void *data,
    149     struct drm_file *file)
    150 {
    151 	struct drm_mode_list_leases *args __unused = data;
    152 
    153 	/* XXX not yet implemented */
    154 	return -ENODEV;
    155 }
    156 
    157 /*
    158  * drm_mode_revoke_lease_ioctl(dev, data, file)
    159  *
    160  *	DRM_IOCTL_MODE_REVOKE_LEASE(struct drm_mode_revoke_lease) ioctl
    161  *	implementation.
    162  */
    163 int
    164 drm_mode_revoke_lease_ioctl(struct drm_device *dev, void *data,
    165     struct drm_file *file)
    166 {
    167 	struct drm_mode_revoke_lease *args __unused = data;
    168 
    169 	/* XXX not yet implemented */
    170 	return -ENODEV;
    171 }
    172