336da115ae1a9d70210130f8f126df180600fbe6
1 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
3 /*
4 * Copyright (C) 2011 Texas Instruments, Inc
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 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 * SOFTWARE.
24 *
25 * Authors:
26 * Rob Clark <rob@ti.com>
27 */
29 #ifdef HAVE_CONFIG_H
30 #include "config.h"
31 #endif
33 #include <stdlib.h>
34 #include <linux/stddef.h>
35 #include <errno.h>
36 #include <sys/mman.h>
37 #include <fcntl.h>
39 #include <xf86drm.h>
41 #include "omap_drm.h"
42 #include "omap_drmif.h"
44 #define __round_mask(x, y) ((__typeof__(x))((y)-1))
45 #define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1)
46 #define PAGE_SIZE 4096
48 struct omap_device {
49 int fd;
50 };
52 /* a GEM buffer object allocated from the DRM device */
53 struct omap_bo {
54 struct omap_device *dev;
55 void *map; /* userspace mmap'ing (if there is one) */
56 uint32_t size;
57 uint32_t handle;
58 uint32_t name; /* flink global handle (DRI2 name) */
59 uint64_t offset; /* offset to mmap() */
60 int fd; /* dmabuf handle */
61 };
63 struct omap_device * omap_device_new(int fd)
64 {
65 struct omap_device *dev = calloc(sizeof(*dev), 1);
66 if (!dev)
67 return NULL;
68 dev->fd = fd;
69 return dev;
70 }
72 void omap_device_del(struct omap_device *dev)
73 {
74 free(dev);
75 }
77 int omap_get_param(struct omap_device *dev, uint64_t param, uint64_t *value)
78 {
79 struct drm_omap_param req = {
80 .param = param,
81 };
82 int ret;
84 ret = drmCommandWriteRead(dev->fd, DRM_OMAP_GET_PARAM, &req, sizeof(req));
85 if (ret) {
86 return ret;
87 }
89 *value = req.value;
91 return 0;
92 }
94 int omap_set_param(struct omap_device *dev, uint64_t param, uint64_t value)
95 {
96 struct drm_omap_param req = {
97 .param = param,
98 .value = value,
99 };
100 return drmCommandWrite(dev->fd, DRM_OMAP_SET_PARAM, &req, sizeof(req));
101 }
103 /* allocate a new buffer object */
104 static struct omap_bo * omap_bo_new_impl(struct omap_device *dev,
105 union omap_gem_size size, uint32_t flags)
106 {
107 struct omap_bo *bo = NULL;
108 struct drm_omap_gem_new req = {
109 .size = size,
110 .flags = flags,
111 };
113 if (size.bytes == 0) {
114 goto fail;
115 }
117 bo = calloc(sizeof(*bo), 1);
118 if (!bo) {
119 goto fail;
120 }
122 bo->dev = dev;
124 if (flags & OMAP_BO_TILED) {
125 bo->size = round_up(size.tiled.width, PAGE_SIZE) * size.tiled.height;
126 } else {
127 bo->size = size.bytes;
128 }
130 if (drmCommandWriteRead(dev->fd, DRM_OMAP_GEM_NEW, &req, sizeof(req))) {
131 goto fail;
132 }
134 bo->handle = req.handle;
136 return bo;
138 fail:
139 free(bo);
140 return NULL;
141 }
144 /* allocate a new (un-tiled) buffer object */
145 struct omap_bo * omap_bo_new(struct omap_device *dev,
146 uint32_t size, uint32_t flags)
147 {
148 union omap_gem_size gsize = {
149 .bytes = size,
150 };
151 if (flags & OMAP_BO_TILED) {
152 return NULL;
153 }
154 return omap_bo_new_impl(dev, gsize, flags);
155 }
157 /* allocate a new buffer object */
158 struct omap_bo * omap_bo_new_tiled(struct omap_device *dev,
159 uint32_t width, uint32_t height, uint32_t flags)
160 {
161 union omap_gem_size gsize = {
162 .tiled = {
163 .width = width,
164 .height = height,
165 },
166 };
167 if (!(flags & OMAP_BO_TILED)) {
168 return NULL;
169 }
170 return omap_bo_new_impl(dev, gsize, flags);
171 }
173 /* get buffer info */
174 static int get_buffer_info(struct omap_bo *bo)
175 {
176 struct drm_omap_gem_info req = {
177 .handle = bo->handle,
178 };
179 int ret = drmCommandWriteRead(bo->dev->fd, DRM_OMAP_GEM_INFO,
180 &req, sizeof(req));
181 if (ret) {
182 return ret;
183 }
185 /* really all we need for now is mmap offset */
186 bo->offset = req.offset;
187 bo->size = req.size;
189 return 0;
190 }
192 /* import a buffer object from DRI2 name */
193 struct omap_bo * omap_bo_from_name(struct omap_device *dev, uint32_t name)
194 {
195 struct omap_bo *bo;
196 struct drm_gem_open req = {
197 .name = name,
198 };
200 bo = calloc(sizeof(*bo), 1);
201 if (!bo) {
202 goto fail;
203 }
205 if (drmIoctl(dev->fd, DRM_IOCTL_GEM_OPEN, &req)) {
206 goto fail;
207 }
209 bo->dev = dev;
210 bo->name = name;
211 bo->handle = req.handle;
213 return bo;
215 fail:
216 free(bo);
217 return NULL;
218 }
220 /* destroy a buffer object */
221 void omap_bo_del(struct omap_bo *bo)
222 {
223 if (!bo) {
224 return;
225 }
227 if (bo->map) {
228 munmap(bo->map, bo->size);
229 }
231 if (bo->handle) {
232 struct drm_gem_close req = {
233 .handle = bo->handle,
234 };
236 drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_CLOSE, &req);
237 }
239 free(bo);
240 }
242 /* get the global flink/DRI2 buffer name */
243 int omap_bo_get_name(struct omap_bo *bo, uint32_t *name)
244 {
245 if (!bo->name) {
246 struct drm_gem_flink req = {
247 .handle = bo->handle,
248 };
249 int ret;
251 ret = drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_FLINK, &req);
252 if (ret) {
253 return ret;
254 }
256 bo->name = req.name;
257 }
259 *name = bo->name;
261 return 0;
262 }
264 uint32_t omap_bo_handle(struct omap_bo *bo)
265 {
266 return bo->handle;
267 }
269 int omap_bo_dmabuf(struct omap_bo *bo)
270 {
271 if (!bo->fd) {
272 struct drm_prime_handle req = {
273 .handle = bo->handle,
274 .flags = DRM_CLOEXEC,
275 };
276 int ret;
278 ret = drmIoctl(bo->dev->fd, DRM_IOCTL_PRIME_HANDLE_TO_FD, &req);
279 if (ret) {
280 return ret;
281 }
283 bo->fd = req.fd;
284 }
285 return bo->fd;
286 }
288 uint32_t omap_bo_size(struct omap_bo *bo)
289 {
290 if (!bo->size) {
291 get_buffer_info(bo);
292 }
293 return bo->size;
294 }
296 void * omap_bo_map(struct omap_bo *bo)
297 {
298 if (!bo->map) {
299 if (!bo->offset) {
300 get_buffer_info(bo);
301 }
303 bo->map = mmap(0, bo->size, PROT_READ | PROT_WRITE,
304 MAP_SHARED, bo->dev->fd, bo->offset);
305 if (bo->map == MAP_FAILED) {
306 bo->map = NULL;
307 }
308 }
309 return bo->map;
310 }
312 int omap_bo_cpu_prep(struct omap_bo *bo, enum omap_gem_op op)
313 {
314 struct drm_omap_gem_cpu_prep req = {
315 .handle = bo->handle,
316 .op = op,
317 };
318 return drmCommandWrite(bo->dev->fd,
319 DRM_OMAP_GEM_CPU_PREP, &req, sizeof(req));
320 }
322 int omap_bo_cpu_fini(struct omap_bo *bo, enum omap_gem_op op)
323 {
324 struct drm_omap_gem_cpu_fini req = {
325 .handle = bo->handle,
326 .op = op,
327 .nregions = 0,
328 };
329 return drmCommandWrite(bo->dev->fd,
330 DRM_OMAP_GEM_CPU_FINI, &req, sizeof(req));
331 }