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 #include "nouveau_drm.h"
44 
45 struct nouveau_bo
46 {
47 	struct kms_bo base;
48 	uint64_t map_handle;
49 	unsigned map_count;
50 };
51 
52 static int
nouveau_get_prop(struct kms_driver * kms,unsigned key,unsigned * out)53 nouveau_get_prop(struct kms_driver *kms, unsigned key, unsigned *out)
54 {
55 	switch (key) {
56 	case KMS_BO_TYPE:
57 		*out = KMS_BO_TYPE_SCANOUT_X8R8G8B8 | KMS_BO_TYPE_CURSOR_64X64_A8R8G8B8;
58 		break;
59 	default:
60 		return -EINVAL;
61 	}
62 	return 0;
63 }
64 
65 static int
nouveau_destroy(struct kms_driver * kms)66 nouveau_destroy(struct kms_driver *kms)
67 {
68 	free(kms);
69 	return 0;
70 }
71 
72 static int
nouveau_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)73 nouveau_bo_create(struct kms_driver *kms,
74 		 const unsigned width, const unsigned height,
75 		 const enum kms_bo_type type, const unsigned *attr,
76 		 struct kms_bo **out)
77 {
78 	struct drm_nouveau_gem_new arg;
79 	unsigned size, pitch;
80 	struct nouveau_bo *bo;
81 	int i, ret;
82 
83 	for (i = 0; attr[i]; i += 2) {
84 		switch (attr[i]) {
85 		case KMS_WIDTH:
86 		case KMS_HEIGHT:
87 		case KMS_BO_TYPE:
88 			break;
89 		default:
90 			return -EINVAL;
91 		}
92 	}
93 
94 	bo = calloc(1, sizeof(*bo));
95 	if (!bo)
96 		return -ENOMEM;
97 
98 	if (type == KMS_BO_TYPE_CURSOR_64X64_A8R8G8B8) {
99 		pitch = 64 * 4;
100 		size = 64 * 64 * 4;
101 	} else if (type == KMS_BO_TYPE_SCANOUT_X8R8G8B8) {
102 		pitch = width * 4;
103 		pitch = (pitch + 512 - 1) & ~(512 - 1);
104 		size = pitch * height;
105 	} else {
106 		free(bo);
107 		return -EINVAL;
108 	}
109 
110 	memset(&arg, 0, sizeof(arg));
111 	arg.info.size = size;
112 	arg.info.domain = NOUVEAU_GEM_DOMAIN_MAPPABLE | NOUVEAU_GEM_DOMAIN_VRAM;
113 	arg.info.tile_mode = 0;
114 	arg.info.tile_flags = 0;
115 	arg.align = 512;
116 	arg.channel_hint = 0;
117 
118 	ret = drmCommandWriteRead(kms->fd, DRM_NOUVEAU_GEM_NEW, &arg, sizeof(arg));
119 	if (ret)
120 		goto err_free;
121 
122 	bo->base.kms = kms;
123 	bo->base.handle = arg.info.handle;
124 	bo->base.size = size;
125 	bo->base.pitch = pitch;
126 	bo->map_handle = arg.info.map_handle;
127 
128 	*out = &bo->base;
129 
130 	return 0;
131 
132 err_free:
133 	free(bo);
134 	return ret;
135 }
136 
137 static int
nouveau_bo_get_prop(struct kms_bo * bo,unsigned key,unsigned * out)138 nouveau_bo_get_prop(struct kms_bo *bo, unsigned key, unsigned *out)
139 {
140 	switch (key) {
141 	default:
142 		return -EINVAL;
143 	}
144 }
145 
146 static int
nouveau_bo_map(struct kms_bo * _bo,void ** out)147 nouveau_bo_map(struct kms_bo *_bo, void **out)
148 {
149 	struct nouveau_bo *bo = (struct nouveau_bo *)_bo;
150 	void *map = NULL;
151 
152 	if (bo->base.ptr) {
153 		bo->map_count++;
154 		*out = bo->base.ptr;
155 		return 0;
156 	}
157 
158 	map = drm_mmap(0, bo->base.size, PROT_READ | PROT_WRITE, MAP_SHARED, bo->base.kms->fd, bo->map_handle);
159 	if (map == MAP_FAILED)
160 		return -errno;
161 
162 	bo->base.ptr = map;
163 	bo->map_count++;
164 	*out = bo->base.ptr;
165 
166 	return 0;
167 }
168 
169 static int
nouveau_bo_unmap(struct kms_bo * _bo)170 nouveau_bo_unmap(struct kms_bo *_bo)
171 {
172 	struct nouveau_bo *bo = (struct nouveau_bo *)_bo;
173 	bo->map_count--;
174 	return 0;
175 }
176 
177 static int
nouveau_bo_destroy(struct kms_bo * _bo)178 nouveau_bo_destroy(struct kms_bo *_bo)
179 {
180 	struct nouveau_bo *bo = (struct nouveau_bo *)_bo;
181 	struct drm_gem_close arg;
182 	int ret;
183 
184 	if (bo->base.ptr) {
185 		/* XXX Sanity check map_count */
186 		drm_munmap(bo->base.ptr, bo->base.size);
187 		bo->base.ptr = NULL;
188 	}
189 
190 	memset(&arg, 0, sizeof(arg));
191 	arg.handle = bo->base.handle;
192 
193 	ret = drmIoctl(bo->base.kms->fd, DRM_IOCTL_GEM_CLOSE, &arg);
194 	if (ret)
195 		return -errno;
196 
197 	free(bo);
198 	return 0;
199 }
200 
201 drm_private int
nouveau_create(int fd,struct kms_driver ** out)202 nouveau_create(int fd, struct kms_driver **out)
203 {
204 	struct kms_driver *kms;
205 
206 	kms = calloc(1, sizeof(*kms));
207 	if (!kms)
208 		return -ENOMEM;
209 
210 	kms->fd = fd;
211 
212 	kms->bo_create = nouveau_bo_create;
213 	kms->bo_map = nouveau_bo_map;
214 	kms->bo_unmap = nouveau_bo_unmap;
215 	kms->bo_get_prop = nouveau_bo_get_prop;
216 	kms->bo_destroy = nouveau_bo_destroy;
217 	kms->get_prop = nouveau_get_prop;
218 	kms->destroy = nouveau_destroy;
219 	*out = kms;
220 
221 	return 0;
222 }
223