1/*-
2 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
3 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
15 * Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
20 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23 * OTHER DEALINGS IN THE SOFTWARE.
24 *
25 * Authors:
26 *    Rickard E. (Rik) Faith <faith@valinux.com>
27 *    Gareth Hughes <gareth@valinux.com>
28 *
29 */
30
31#include <sys/cdefs.h>
32__FBSDID("$FreeBSD$");
33
34/** @file drm_drawable.c
35 * This file implements ioctls to store information along with DRM drawables,
36 * such as the current set of cliprects for vblank-synced buffer swaps.
37 */
38
39#include "dev/drm/drmP.h"
40
41struct bsd_drm_drawable_info {
42	struct drm_drawable_info info;
43	int handle;
44	RB_ENTRY(bsd_drm_drawable_info) tree;
45};
46
47static int
48drm_drawable_compare(struct bsd_drm_drawable_info *a,
49    struct bsd_drm_drawable_info *b)
50{
51	if (a->handle > b->handle)
52		return 1;
53	if (a->handle < b->handle)
54		return -1;
55	return 0;
56}
57
58RB_GENERATE_STATIC(drawable_tree, bsd_drm_drawable_info, tree,
59    drm_drawable_compare);
60
61struct drm_drawable_info *
62drm_get_drawable_info(struct drm_device *dev, int handle)
63{
64	struct bsd_drm_drawable_info find, *result;
65
66	find.handle = handle;
67	result = RB_FIND(drawable_tree, &dev->drw_head, &find);
68
69	return &result->info;
70}
71
72int drm_adddraw(struct drm_device *dev, void *data, struct drm_file *file_priv)
73{
74	struct drm_draw *draw = data;
75	struct bsd_drm_drawable_info *info;
76
77	info = malloc(sizeof(struct bsd_drm_drawable_info), DRM_MEM_DRAWABLE,
78	    M_NOWAIT | M_ZERO);
79	if (info == NULL)
80		return ENOMEM;
81
82	info->handle = alloc_unr(dev->drw_unrhdr);
83	DRM_SPINLOCK(&dev->drw_lock);
84	RB_INSERT(drawable_tree, &dev->drw_head, info);
85	draw->handle = info->handle;
86	DRM_SPINUNLOCK(&dev->drw_lock);
87
88	DRM_DEBUG("%d\n", draw->handle);
89
90	return 0;
91}
92
93int drm_rmdraw(struct drm_device *dev, void *data, struct drm_file *file_priv)
94{
95	struct drm_draw *draw = (struct drm_draw *)data;
96	struct drm_drawable_info *info;
97
98	DRM_SPINLOCK(&dev->drw_lock);
99	info = drm_get_drawable_info(dev, draw->handle);
100	if (info != NULL) {
101		RB_REMOVE(drawable_tree, &dev->drw_head,
102		    (struct bsd_drm_drawable_info *)info);
103		DRM_SPINUNLOCK(&dev->drw_lock);
104		free_unr(dev->drw_unrhdr, draw->handle);
105		free(info->rects, DRM_MEM_DRAWABLE);
106		free(info, DRM_MEM_DRAWABLE);
107		return 0;
108	} else {
109		DRM_SPINUNLOCK(&dev->drw_lock);
110		return EINVAL;
111	}
112}
113
114int drm_update_draw(struct drm_device *dev, void *data,
115		    struct drm_file *file_priv)
116{
117	struct drm_drawable_info *info;
118	struct drm_update_draw *update = (struct drm_update_draw *)data;
119	int ret;
120
121	info = drm_get_drawable_info(dev, update->handle);
122	if (info == NULL)
123		return EINVAL;
124
125	switch (update->type) {
126	case DRM_DRAWABLE_CLIPRECTS:
127		DRM_SPINLOCK(&dev->drw_lock);
128		if (update->num != info->num_rects) {
129			free(info->rects, DRM_MEM_DRAWABLE);
130			info->rects = NULL;
131			info->num_rects = 0;
132		}
133		if (update->num == 0) {
134			DRM_SPINUNLOCK(&dev->drw_lock);
135			return 0;
136		}
137		if (info->rects == NULL) {
138			info->rects = malloc(sizeof(*info->rects) *
139			    update->num, DRM_MEM_DRAWABLE, M_NOWAIT);
140			if (info->rects == NULL) {
141				DRM_SPINUNLOCK(&dev->drw_lock);
142				return ENOMEM;
143			}
144			info->num_rects = update->num;
145		}
146		/* For some reason the pointer arg is unsigned long long. */
147		ret = copyin((void *)(intptr_t)update->data, info->rects,
148		    sizeof(*info->rects) * info->num_rects);
149		DRM_SPINUNLOCK(&dev->drw_lock);
150		return ret;
151	default:
152		return EINVAL;
153	}
154}
155
156void drm_drawable_free_all(struct drm_device *dev)
157{
158	struct bsd_drm_drawable_info *info, *next;
159
160	DRM_SPINLOCK(&dev->drw_lock);
161	for (info = RB_MIN(drawable_tree, &dev->drw_head);
162	    info != NULL ; info = next) {
163		next = RB_NEXT(drawable_tree, &dev->drw_head, info);
164		RB_REMOVE(drawable_tree, &dev->drw_head,
165		    (struct bsd_drm_drawable_info *)info);
166		DRM_SPINUNLOCK(&dev->drw_lock);
167		free_unr(dev->drw_unrhdr, info->handle);
168		free(info->info.rects, DRM_MEM_DRAWABLE);
169		free(info, DRM_MEM_DRAWABLE);
170		DRM_SPINLOCK(&dev->drw_lock);
171	}
172	DRM_SPINUNLOCK(&dev->drw_lock);
173}
174