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/** @file drm_drawable.c
32 * This file implements ioctls to store information along with DRM drawables,
33 * such as the current set of cliprects for vblank-synced buffer swaps.
34 */
35
36#include "drmP.h"
37
38struct bsd_drm_drawable_info {
39	struct drm_drawable_info info;
40	int handle;
41	RB_ENTRY(bsd_drm_drawable_info) tree;
42};
43
44static int
45drm_drawable_compare(struct bsd_drm_drawable_info *a,
46    struct bsd_drm_drawable_info *b)
47{
48	if (a->handle > b->handle)
49		return 1;
50	if (a->handle < b->handle)
51		return -1;
52	return 0;
53}
54
55RB_GENERATE_STATIC(drawable_tree, bsd_drm_drawable_info, tree,
56    drm_drawable_compare);
57
58struct drm_drawable_info *
59drm_get_drawable_info(struct drm_device *dev, int handle)
60{
61	struct bsd_drm_drawable_info find, *result;
62
63	find.handle = handle;
64	result = RB_FIND(drawable_tree, &dev->drw_head, &find);
65
66	return &result->info;
67}
68
69int drm_adddraw(struct drm_device *dev, void *data, struct drm_file *file_priv)
70{
71	struct drm_draw *draw = data;
72	struct bsd_drm_drawable_info *info;
73
74	info = malloc(sizeof(struct bsd_drm_drawable_info), DRM_MEM_DRAWABLE,
75	    M_NOWAIT | M_ZERO);
76	if (info == NULL)
77		return ENOMEM;
78
79#if defined(__FreeBSD__)
80	info->handle = alloc_unr(dev->drw_unrhdr);
81#endif
82	DRM_SPINLOCK(&dev->drw_lock);
83#if defined(__NetBSD__)
84	info->handle = ++dev->drw_no;
85#endif
86	RB_INSERT(drawable_tree, &dev->drw_head, info);
87	draw->handle = info->handle;
88	DRM_SPINUNLOCK(&dev->drw_lock);
89
90	DRM_DEBUG("%d\n", draw->handle);
91
92	return 0;
93}
94
95int drm_rmdraw(struct drm_device *dev, void *data, struct drm_file *file_priv)
96{
97	struct drm_draw *draw = (struct drm_draw *)data;
98	struct drm_drawable_info *info;
99
100	DRM_SPINLOCK(&dev->drw_lock);
101	info = drm_get_drawable_info(dev, draw->handle);
102	if (info != NULL) {
103		RB_REMOVE(drawable_tree, &dev->drw_head,
104		    (struct bsd_drm_drawable_info *)info);
105		DRM_SPINUNLOCK(&dev->drw_lock);
106#if defined(__FreeBSD__)
107		free_unr(dev->drw_unrhdr, draw->handle);
108#endif
109		if (info->rects)
110			free(info->rects, DRM_MEM_DRAWABLE);
111		free(info, DRM_MEM_DRAWABLE);
112		return 0;
113	} else {
114		DRM_SPINUNLOCK(&dev->drw_lock);
115		return EINVAL;
116	}
117}
118
119int drm_update_draw(struct drm_device *dev, void *data,
120		    struct drm_file *file_priv)
121{
122	struct drm_drawable_info *info;
123	struct drm_update_draw *update = (struct drm_update_draw *)data;
124	int ret;
125
126	info = drm_get_drawable_info(dev, update->handle);
127	if (info == NULL)
128		return EINVAL;
129
130	switch (update->type) {
131	case DRM_DRAWABLE_CLIPRECTS:
132		DRM_SPINLOCK(&dev->drw_lock);
133		if (update->num != info->num_rects) {
134			if (info->rects)
135				free(info->rects, DRM_MEM_DRAWABLE);
136			info->rects = NULL;
137			info->num_rects = 0;
138		}
139		if (update->num == 0) {
140			DRM_SPINUNLOCK(&dev->drw_lock);
141			return 0;
142		}
143		if (info->rects == NULL) {
144			info->rects = malloc(sizeof(*info->rects) *
145			    update->num, DRM_MEM_DRAWABLE, M_NOWAIT);
146			if (info->rects == NULL) {
147				DRM_SPINUNLOCK(&dev->drw_lock);
148				return ENOMEM;
149			}
150			info->num_rects = update->num;
151		}
152		/* For some reason the pointer arg is unsigned long long. */
153		ret = copyin((void *)(intptr_t)update->data, info->rects,
154		    sizeof(*info->rects) * info->num_rects);
155		DRM_SPINUNLOCK(&dev->drw_lock);
156		return ret;
157	default:
158		return EINVAL;
159	}
160}
161
162void drm_drawable_free_all(struct drm_device *dev)
163{
164	struct bsd_drm_drawable_info *info, *next;
165
166	DRM_SPINLOCK(&dev->drw_lock);
167	for (info = RB_MIN(drawable_tree, &dev->drw_head);
168	    info != NULL ; info = next) {
169		next = RB_NEXT(drawable_tree, &dev->drw_head, info);
170		RB_REMOVE(drawable_tree, &dev->drw_head,
171		    (struct bsd_drm_drawable_info *)info);
172		DRM_SPINUNLOCK(&dev->drw_lock);
173#if defined(__FreeBSD__)
174		free_unr(dev->drw_unrhdr, info->handle);
175#endif
176		if (info->info.rects)
177			free(info->info.rects, DRM_MEM_DRAWABLE);
178		free(info, DRM_MEM_DRAWABLE);
179		DRM_SPINLOCK(&dev->drw_lock);
180	}
181	DRM_SPINUNLOCK(&dev->drw_lock);
182}
183