1/*
2 * Copyright (C) 2012 Samsung Electronics Co., Ltd.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 * SOFTWARE.
22 *
23 * Authors:
24 *    Inki Dae <inki.dae@samsung.com>
25 */
26
27#ifdef HAVE_CONFIG_H
28#include "config.h"
29#endif
30
31#include <stdlib.h>
32#include <stdio.h>
33#include <string.h>
34#include <errno.h>
35#include <unistd.h>
36
37#include <sys/mman.h>
38#include <linux/stddef.h>
39
40#include <xf86drm.h>
41
42#include "libdrm_macros.h"
43#include "exynos_drm.h"
44#include "exynos_drmif.h"
45
46#define U642VOID(x) ((void *)(unsigned long)(x))
47
48/*
49 * Create exynos drm device object.
50 *
51 * @fd: file descriptor to exynos drm driver opened.
52 *
53 * if true, return the device object else NULL.
54 */
55struct exynos_device * exynos_device_create(int fd)
56{
57	struct exynos_device *dev;
58
59	dev = calloc(sizeof(*dev), 1);
60	if (!dev) {
61		fprintf(stderr, "failed to create device[%s].\n",
62				strerror(errno));
63		return NULL;
64	}
65
66	dev->fd = fd;
67
68	return dev;
69}
70
71/*
72 * Destroy exynos drm device object
73 *
74 * @dev: exynos drm device object.
75 */
76void exynos_device_destroy(struct exynos_device *dev)
77{
78	free(dev);
79}
80
81/*
82 * Create a exynos buffer object to exynos drm device.
83 *
84 * @dev: exynos drm device object.
85 * @size: user-desired size.
86 * flags: user-desired memory type.
87 *	user can set one or more types among several types to memory
88 *	allocation and cache attribute types. and as default,
89 *	EXYNOS_BO_NONCONTIG and EXYNOS-BO_NONCACHABLE types would
90 *	be used.
91 *
92 * if true, return a exynos buffer object else NULL.
93 */
94struct exynos_bo * exynos_bo_create(struct exynos_device *dev,
95					       size_t size, uint32_t flags)
96{
97	struct exynos_bo *bo;
98	struct drm_exynos_gem_create req = {
99		.size = size,
100		.flags = flags,
101	};
102
103	if (size == 0) {
104		fprintf(stderr, "invalid size.\n");
105		goto fail;
106	}
107
108	bo = calloc(sizeof(*bo), 1);
109	if (!bo) {
110		fprintf(stderr, "failed to create bo[%s].\n",
111				strerror(errno));
112		goto err_free_bo;
113	}
114
115	bo->dev = dev;
116
117	if (drmIoctl(dev->fd, DRM_IOCTL_EXYNOS_GEM_CREATE, &req)){
118		fprintf(stderr, "failed to create gem object[%s].\n",
119				strerror(errno));
120		goto err_free_bo;
121	}
122
123	bo->handle = req.handle;
124	bo->size = size;
125	bo->flags = flags;
126
127	return bo;
128
129err_free_bo:
130	free(bo);
131fail:
132	return NULL;
133}
134
135/*
136 * Get information to gem region allocated.
137 *
138 * @dev: exynos drm device object.
139 * @handle: gem handle to request gem info.
140 * @size: size to gem object and returned by kernel side.
141 * @flags: gem flags to gem object and returned by kernel side.
142 *
143 * with this function call, you can get flags and size to gem handle
144 * through bo object.
145 *
146 * if true, return 0 else negative.
147 */
148int exynos_bo_get_info(struct exynos_device *dev, uint32_t handle,
149				  size_t *size, uint32_t *flags)
150{
151	int ret;
152	struct drm_exynos_gem_info req = {
153		.handle = handle,
154	};
155
156	ret = drmIoctl(dev->fd, DRM_IOCTL_EXYNOS_GEM_GET, &req);
157	if (ret < 0) {
158		fprintf(stderr, "failed to get gem object information[%s].\n",
159				strerror(errno));
160		return ret;
161	}
162
163	*size = req.size;
164	*flags = req.flags;
165
166	return 0;
167}
168
169/*
170 * Destroy a exynos buffer object.
171 *
172 * @bo: a exynos buffer object to be destroyed.
173 */
174void exynos_bo_destroy(struct exynos_bo *bo)
175{
176	if (!bo)
177		return;
178
179	if (bo->vaddr)
180		munmap(bo->vaddr, bo->size);
181
182	if (bo->handle) {
183		struct drm_gem_close req = {
184			.handle = bo->handle,
185		};
186
187		drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_CLOSE, &req);
188	}
189
190	free(bo);
191}
192
193
194/*
195 * Get a exynos buffer object from a gem global object name.
196 *
197 * @dev: a exynos device object.
198 * @name: a gem global object name exported by another process.
199 *
200 * this interface is used to get a exynos buffer object from a gem
201 * global object name sent by another process for buffer sharing.
202 *
203 * if true, return a exynos buffer object else NULL.
204 *
205 */
206struct exynos_bo *
207exynos_bo_from_name(struct exynos_device *dev, uint32_t name)
208{
209	struct exynos_bo *bo;
210	struct drm_gem_open req = {
211		.name = name,
212	};
213
214	bo = calloc(sizeof(*bo), 1);
215	if (!bo) {
216		fprintf(stderr, "failed to allocate bo[%s].\n",
217				strerror(errno));
218		return NULL;
219	}
220
221	if (drmIoctl(dev->fd, DRM_IOCTL_GEM_OPEN, &req)) {
222		fprintf(stderr, "failed to open gem object[%s].\n",
223				strerror(errno));
224		goto err_free_bo;
225	}
226
227	bo->dev = dev;
228	bo->name = name;
229	bo->handle = req.handle;
230
231	return bo;
232
233err_free_bo:
234	free(bo);
235	return NULL;
236}
237
238/*
239 * Get a gem global object name from a gem object handle.
240 *
241 * @bo: a exynos buffer object including gem handle.
242 * @name: a gem global object name to be got by kernel driver.
243 *
244 * this interface is used to get a gem global object name from a gem object
245 * handle to a buffer that wants to share it with another process.
246 *
247 * if true, return 0 else negative.
248 */
249int exynos_bo_get_name(struct exynos_bo *bo, uint32_t *name)
250{
251	if (!bo->name) {
252		struct drm_gem_flink req = {
253			.handle = bo->handle,
254		};
255		int ret;
256
257		ret = drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_FLINK, &req);
258		if (ret) {
259			fprintf(stderr, "failed to get gem global name[%s].\n",
260					strerror(errno));
261			return ret;
262		}
263
264		bo->name = req.name;
265	}
266
267	*name = bo->name;
268
269	return 0;
270}
271
272uint32_t exynos_bo_handle(struct exynos_bo *bo)
273{
274	return bo->handle;
275}
276
277/*
278 * Mmap a buffer to user space.
279 *
280 * @bo: a exynos buffer object including a gem object handle to be mmapped
281 *	to user space.
282 *
283 * if true, user pointer mmaped else NULL.
284 */
285void *exynos_bo_map(struct exynos_bo *bo)
286{
287	if (!bo->vaddr) {
288		struct exynos_device *dev = bo->dev;
289		struct drm_mode_map_dumb arg;
290		void *map = NULL;
291		int ret;
292
293		memset(&arg, 0, sizeof(arg));
294		arg.handle = bo->handle;
295
296		ret = drmIoctl(dev->fd, DRM_IOCTL_MODE_MAP_DUMB, &arg);
297		if (ret) {
298			fprintf(stderr, "failed to map dumb buffer[%s].\n",
299				strerror(errno));
300			return NULL;
301		}
302
303		map = drm_mmap(0, bo->size, PROT_READ | PROT_WRITE, MAP_SHARED,
304				dev->fd, arg.offset);
305
306		if (map != MAP_FAILED)
307			bo->vaddr = map;
308	}
309
310	return bo->vaddr;
311}
312
313/*
314 * Export gem object to dmabuf as file descriptor.
315 *
316 * @dev: exynos device object
317 * @handle: gem handle to export as file descriptor of dmabuf
318 * @fd: file descriptor returned from kernel
319 *
320 * @return: 0 on success, -1 on error, and errno will be set
321 */
322int
323exynos_prime_handle_to_fd(struct exynos_device *dev, uint32_t handle, int *fd)
324{
325	return drmPrimeHandleToFD(dev->fd, handle, 0, fd);
326}
327
328/*
329 * Import file descriptor into gem handle.
330 *
331 * @dev: exynos device object
332 * @fd: file descriptor of dmabuf to import
333 * @handle: gem handle returned from kernel
334 *
335 * @return: 0 on success, -1 on error, and errno will be set
336 */
337int
338exynos_prime_fd_to_handle(struct exynos_device *dev, int fd, uint32_t *handle)
339{
340	return drmPrimeFDToHandle(dev->fd, fd, handle);
341}
342
343
344
345/*
346 * Request Wireless Display connection or disconnection.
347 *
348 * @dev: a exynos device object.
349 * @connect: indicate whether connectoin or disconnection request.
350 * @ext: indicate whether edid data includes extentions data or not.
351 * @edid: a pointer to edid data from Wireless Display device.
352 *
353 * this interface is used to request Virtual Display driver connection or
354 * disconnection. for this, user should get a edid data from the Wireless
355 * Display device and then send that data to kernel driver with connection
356 * request
357 *
358 * if true, return 0 else negative.
359 */
360int
361exynos_vidi_connection(struct exynos_device *dev, uint32_t connect,
362		       uint32_t ext, void *edid)
363{
364	struct drm_exynos_vidi_connection req = {
365		.connection	= connect,
366		.extensions	= ext,
367		.edid		= (uint64_t)(uintptr_t)edid,
368	};
369	int ret;
370
371	ret = drmIoctl(dev->fd, DRM_IOCTL_EXYNOS_VIDI_CONNECTION, &req);
372	if (ret) {
373		fprintf(stderr, "failed to request vidi connection[%s].\n",
374				strerror(errno));
375		return ret;
376	}
377
378	return 0;
379}
380
381static void
382exynos_handle_vendor(int fd, struct drm_event *e, void *ctx)
383{
384	struct drm_exynos_g2d_event *g2d;
385	struct exynos_event_context *ectx = ctx;
386
387	switch (e->type) {
388		case DRM_EXYNOS_G2D_EVENT:
389			if (ectx->version < 1 || ectx->g2d_event_handler == NULL)
390				break;
391			g2d = (struct drm_exynos_g2d_event *)e;
392			ectx->g2d_event_handler(fd, g2d->cmdlist_no, g2d->tv_sec,
393						g2d->tv_usec, U642VOID(g2d->user_data));
394			break;
395
396		default:
397			break;
398	}
399}
400
401int
402exynos_handle_event(struct exynos_device *dev, struct exynos_event_context *ctx)
403{
404	char buffer[1024];
405	int len, i;
406	struct drm_event *e;
407	struct drm_event_vblank *vblank;
408	drmEventContextPtr evctx = &ctx->base;
409
410	/* The DRM read semantics guarantees that we always get only
411	 * complete events. */
412	len = read(dev->fd, buffer, sizeof buffer);
413	if (len == 0)
414		return 0;
415	if (len < (int)sizeof *e)
416		return -1;
417
418	i = 0;
419	while (i < len) {
420		e = (struct drm_event *) &buffer[i];
421		switch (e->type) {
422		case DRM_EVENT_VBLANK:
423			if (evctx->version < 1 ||
424			    evctx->vblank_handler == NULL)
425				break;
426			vblank = (struct drm_event_vblank *) e;
427			evctx->vblank_handler(dev->fd,
428					      vblank->sequence,
429					      vblank->tv_sec,
430					      vblank->tv_usec,
431					      U642VOID (vblank->user_data));
432			break;
433		case DRM_EVENT_FLIP_COMPLETE:
434			if (evctx->version < 2 ||
435			    evctx->page_flip_handler == NULL)
436				break;
437			vblank = (struct drm_event_vblank *) e;
438			evctx->page_flip_handler(dev->fd,
439						 vblank->sequence,
440						 vblank->tv_sec,
441						 vblank->tv_usec,
442						 U642VOID (vblank->user_data));
443			break;
444		default:
445			exynos_handle_vendor(dev->fd, e, evctx);
446			break;
447		}
448		i += e->length;
449	}
450
451	return 0;
452}
453