Rearranging to get into the format needed to build
[adaptation/panda/libdrm.git] / libkms / vmwgfx.c
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 #define HAVE_STDINT_H
30 #define _FILE_OFFSET_BITS 64
31
32 #include <errno.h>
33 #include <stdlib.h>
34 #include <string.h>
35 #include "internal.h"
36
37 #include <sys/mman.h>
38 #include "xf86drm.h"
39 #include "vmwgfx_drm.h"
40
41 struct vmwgfx_bo
42 {
43         struct kms_bo base;
44         uint64_t map_handle;
45         unsigned map_count;
46 };
47
48 static int
49 vmwgfx_get_prop(struct kms_driver *kms, unsigned key, unsigned *out)
50 {
51         switch (key) {
52         case KMS_BO_TYPE:
53                 *out = KMS_BO_TYPE_SCANOUT_X8R8G8B8 | KMS_BO_TYPE_CURSOR_64X64_A8R8G8B8;
54                 break;
55         default:
56                 return -EINVAL;
57         }
58         return 0;
59 }
60
61 static int
62 vmwgfx_destroy(struct kms_driver *kms)
63 {
64         free(kms);
65         return 0;
66 }
67
68 static int
69 vmwgfx_bo_create(struct kms_driver *kms,
70                  const unsigned width, const unsigned height,
71                  const enum kms_bo_type type, const unsigned *attr,
72                  struct kms_bo **out)
73 {
74         struct vmwgfx_bo *bo;
75         int i, ret;
76
77         for (i = 0; attr[i]; i += 2) {
78                 switch (attr[i]) {
79                 case KMS_WIDTH:
80                 case KMS_HEIGHT:
81                 case KMS_BO_TYPE:
82                         break;
83                 default:
84                         return -EINVAL;
85                 }
86         }
87
88         bo = calloc(1, sizeof(*bo));
89         if (!bo)
90                 return -EINVAL;
91
92         {
93                 union drm_vmw_alloc_dmabuf_arg arg;
94                 struct drm_vmw_alloc_dmabuf_req *req = &arg.req;
95                 struct drm_vmw_dmabuf_rep *rep = &arg.rep;
96
97                 memset(&arg, 0, sizeof(arg));
98                 req->size = width * height * 4;
99                 bo->base.size = req->size;
100                 bo->base.pitch = width * 4;
101                 bo->base.kms = kms;
102
103                 do {
104                         ret = drmCommandWriteRead(bo->base.kms->fd,
105                                                   DRM_VMW_ALLOC_DMABUF,
106                                                   &arg, sizeof(arg));
107                 } while (ret == -ERESTART);
108
109                 if (ret)
110                         goto err_free;
111
112                 bo->base.handle = rep->handle;
113                 bo->map_handle = rep->map_handle;
114                 bo->base.handle = rep->cur_gmr_id;
115                 bo->base.offset = rep->cur_gmr_offset;
116         }
117
118         *out = &bo->base;
119
120         return 0;
121
122 err_free:
123         free(bo);
124         return ret;
125 }
126
127 static int
128 vmwgfx_bo_get_prop(struct kms_bo *bo, unsigned key, unsigned *out)
129 {
130         switch (key) {
131         default:
132                 return -EINVAL;
133         }
134 }
135
136 static int
137 vmwgfx_bo_map(struct kms_bo *_bo, void **out)
138 {
139         struct vmwgfx_bo *bo = (struct vmwgfx_bo *)_bo;
140         void *map;
141
142         if (bo->base.ptr) {
143                 bo->map_count++;
144                 *out = bo->base.ptr;
145                 return 0;
146         }
147
148         map = mmap(NULL, bo->base.size, PROT_READ | PROT_WRITE, MAP_SHARED, bo->base.kms->fd, bo->map_handle);
149         if (map == MAP_FAILED)
150                 return -errno;
151
152         bo->base.ptr = map;
153         bo->map_count++;
154         *out = bo->base.ptr;
155
156         return 0;
157 }
158
159 static int
160 vmwgfx_bo_unmap(struct kms_bo *_bo)
161 {
162         struct vmwgfx_bo *bo = (struct vmwgfx_bo *)_bo;
163         bo->map_count--;
164         return 0;
165 }
166
167 static int
168 vmwgfx_bo_destroy(struct kms_bo *_bo)
169 {
170         struct vmwgfx_bo *bo = (struct vmwgfx_bo *)_bo;
171         struct drm_vmw_unref_dmabuf_arg arg;
172
173         if (bo->base.ptr) {
174                 /* XXX Sanity check map_count */
175                 munmap(bo->base.ptr, bo->base.size);
176                 bo->base.ptr = NULL;
177         }
178
179         memset(&arg, 0, sizeof(arg));
180         arg.handle = bo->base.handle;
181         drmCommandWrite(bo->base.kms->fd, DRM_VMW_UNREF_DMABUF, &arg, sizeof(arg));
182
183         free(bo);
184         return 0;
185 }
186
187 int
188 vmwgfx_create(int fd, struct kms_driver **out)
189 {
190         struct kms_driver *kms;
191
192         kms = calloc(1, sizeof(*kms));
193         if (!kms)
194                 return -ENOMEM;
195
196         kms->fd = fd;
197
198         kms->bo_create = vmwgfx_bo_create;
199         kms->bo_map = vmwgfx_bo_map;
200         kms->bo_unmap = vmwgfx_bo_unmap;
201         kms->bo_get_prop = vmwgfx_bo_get_prop;
202         kms->bo_destroy = vmwgfx_bo_destroy;
203         kms->get_prop = vmwgfx_get_prop;
204         kms->destroy = vmwgfx_destroy;
205         *out = kms;
206         return 0;
207 }