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 
43 struct dumb_bo
44 {
45 	struct kms_bo base;
46 	unsigned map_count;
47 };
48 
49 static int
dumb_get_prop(struct kms_driver * kms,unsigned key,unsigned * out)50 dumb_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 
62 static int
dumb_destroy(struct kms_driver * kms)63 dumb_destroy(struct kms_driver *kms)
64 {
65 	free(kms);
66 	return 0;
67 }
68 
69 static int
dumb_bo_create(struct kms_driver * kms,const unsigned width,const unsigned height,const enum kms_bo_type type,const unsigned * attr,struct kms_bo ** out)70 dumb_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 
115 err_free:
116 	free(bo);
117 	return ret;
118 }
119 
120 static int
dumb_bo_get_prop(struct kms_bo * bo,unsigned key,unsigned * out)121 dumb_bo_get_prop(struct kms_bo *bo, unsigned key, unsigned *out)
122 {
123 	switch (key) {
124 	default:
125 		return -EINVAL;
126 	}
127 }
128 
129 static int
dumb_bo_map(struct kms_bo * _bo,void ** out)130 dumb_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 
161 static int
dumb_bo_unmap(struct kms_bo * _bo)162 dumb_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 
169 static int
dumb_bo_destroy(struct kms_bo * _bo)170 dumb_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 
193 drm_private int
dumb_create(int fd,struct kms_driver ** out)194 dumb_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