1/**************************************************************************
2 *
3 * Copyright © 2009 VMware, Inc., Palo Alto, CA., USA
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
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
21 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
24 * USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28
29#ifdef HAVE_CONFIG_H
30#include "config.h"
31#endif
32
33#include <errno.h>
34#include <stdio.h>
35#include <stdlib.h>
36#include <string.h>
37#include "internal.h"
38
39#include <sys/ioctl.h>
40#include "xf86drm.h"
41#include "libdrm_macros.h"
42
43struct dumb_bo
44{
45	struct kms_bo base;
46	unsigned map_count;
47};
48
49static int
50dumb_get_prop(struct kms_driver *kms, unsigned key, unsigned *out)
51{
52	switch (key) {
53	case KMS_BO_TYPE:
54		*out = KMS_BO_TYPE_SCANOUT_X8R8G8B8 | KMS_BO_TYPE_CURSOR_64X64_A8R8G8B8;
55		break;
56	default:
57		return -EINVAL;
58	}
59	return 0;
60}
61
62static int
63dumb_destroy(struct kms_driver *kms)
64{
65	free(kms);
66	return 0;
67}
68
69static int
70dumb_bo_create(struct kms_driver *kms,
71		 const unsigned width, const unsigned height,
72		 const enum kms_bo_type type, const unsigned *attr,
73		 struct kms_bo **out)
74{
75	struct drm_mode_create_dumb arg;
76	struct dumb_bo *bo;
77	int i, ret;
78
79	for (i = 0; attr[i]; i += 2) {
80		switch (attr[i]) {
81		case KMS_WIDTH:
82		case KMS_HEIGHT:
83			break;
84		case KMS_BO_TYPE:
85			break;
86		default:
87			return -EINVAL;
88		}
89	}
90
91	bo = calloc(1, sizeof(*bo));
92	if (!bo)
93		return -ENOMEM;
94
95	memset(&arg, 0, sizeof(arg));
96
97	/* All BO_TYPE currently are 32bpp formats */
98	arg.bpp = 32;
99	arg.width = width;
100	arg.height = height;
101
102	ret = drmIoctl(kms->fd, DRM_IOCTL_MODE_CREATE_DUMB, &arg);
103	if (ret)
104		goto err_free;
105
106	bo->base.kms = kms;
107	bo->base.handle = arg.handle;
108	bo->base.size = arg.size;
109	bo->base.pitch = arg.pitch;
110
111	*out = &bo->base;
112
113	return 0;
114
115err_free:
116	free(bo);
117	return ret;
118}
119
120static int
121dumb_bo_get_prop(struct kms_bo *bo, unsigned key, unsigned *out)
122{
123	switch (key) {
124	default:
125		return -EINVAL;
126	}
127}
128
129static int
130dumb_bo_map(struct kms_bo *_bo, void **out)
131{
132	struct dumb_bo *bo = (struct dumb_bo *)_bo;
133	struct drm_mode_map_dumb arg;
134	void *map = NULL;
135	int ret;
136
137	if (bo->base.ptr) {
138		bo->map_count++;
139		*out = bo->base.ptr;
140		return 0;
141	}
142
143	memset(&arg, 0, sizeof(arg));
144	arg.handle = bo->base.handle;
145
146	ret = drmIoctl(bo->base.kms->fd, DRM_IOCTL_MODE_MAP_DUMB, &arg);
147	if (ret)
148		return ret;
149
150	map = drm_mmap(0, bo->base.size, PROT_READ | PROT_WRITE, MAP_SHARED, bo->base.kms->fd, arg.offset);
151	if (map == MAP_FAILED)
152		return -errno;
153
154	bo->base.ptr = map;
155	bo->map_count++;
156	*out = bo->base.ptr;
157
158	return 0;
159}
160
161static int
162dumb_bo_unmap(struct kms_bo *_bo)
163{
164	struct dumb_bo *bo = (struct dumb_bo *)_bo;
165	bo->map_count--;
166	return 0;
167}
168
169static int
170dumb_bo_destroy(struct kms_bo *_bo)
171{
172	struct dumb_bo *bo = (struct dumb_bo *)_bo;
173	struct drm_mode_destroy_dumb arg;
174	int ret;
175
176	if (bo->base.ptr) {
177		/* XXX Sanity check map_count */
178		drm_munmap(bo->base.ptr, bo->base.size);
179		bo->base.ptr = NULL;
180	}
181
182	memset(&arg, 0, sizeof(arg));
183	arg.handle = bo->base.handle;
184
185	ret = drmIoctl(bo->base.kms->fd, DRM_IOCTL_MODE_DESTROY_DUMB, &arg);
186	if (ret)
187		return -errno;
188
189	free(bo);
190	return 0;
191}
192
193drm_private int
194dumb_create(int fd, struct kms_driver **out)
195{
196	struct kms_driver *kms;
197	int ret;
198	uint64_t cap = 0;
199
200	ret = drmGetCap(fd, DRM_CAP_DUMB_BUFFER, &cap);
201	if (ret || cap == 0)
202		return -EINVAL;
203
204	kms = calloc(1, sizeof(*kms));
205	if (!kms)
206		return -ENOMEM;
207
208	kms->fd = fd;
209
210	kms->bo_create = dumb_bo_create;
211	kms->bo_map = dumb_bo_map;
212	kms->bo_unmap = dumb_bo_unmap;
213	kms->bo_get_prop = dumb_bo_get_prop;
214	kms->bo_destroy = dumb_bo_destroy;
215	kms->get_prop = dumb_get_prop;
216	kms->destroy = dumb_destroy;
217	*out = kms;
218
219	return 0;
220}
221