1 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
4 * Copyright (C) 2011 Texas Instruments, Inc
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:
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
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
26 * Rob Clark <rob@ti.com>
34 #include <linux/stddef.h>
35 #include <linux/types.h>
43 #include <xf86atomic.h>
46 #include "omap_drmif.h"
48 #define __round_mask(x, y) ((__typeof__(x))((y)-1))
49 #define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1)
50 #define PAGE_SIZE 4096
52 static pthread_mutex_t table_lock = PTHREAD_MUTEX_INITIALIZER;
53 static void * dev_table;
59 /* The handle_table is used to track GEM bo handles associated w/
60 * this fd. This is needed, in particular, when importing
61 * dmabuf's because we don't want multiple 'struct omap_bo's
62 * floating around with the same handle. Otherwise, when the
63 * first one is omap_bo_del()'d the handle becomes no longer
64 * valid, and the remaining 'struct omap_bo's are left pointing
65 * to an invalid handle (and possible a GEM bo that is already
71 /* a GEM buffer object allocated from the DRM device */
73 struct omap_device *dev;
74 void *map; /* userspace mmap'ing (if there is one) */
77 uint32_t name; /* flink global handle (DRI2 name) */
78 uint64_t offset; /* offset to mmap() */
79 int fd; /* dmabuf handle */
83 static struct omap_device * omap_device_new_impl(int fd)
85 struct omap_device *dev = calloc(sizeof(*dev), 1);
89 atomic_set(&dev->refcnt, 1);
90 dev->handle_table = drmHashCreate();
94 struct omap_device * omap_device_new(int fd)
96 struct omap_device *dev = NULL;
98 pthread_mutex_lock(&table_lock);
101 dev_table = drmHashCreate();
103 if (drmHashLookup(dev_table, fd, (void **)&dev)) {
104 /* not found, create new device */
105 dev = omap_device_new_impl(fd);
106 drmHashInsert(dev_table, fd, dev);
108 /* found, just incr refcnt */
109 dev = omap_device_ref(dev);
112 pthread_mutex_unlock(&table_lock);
117 struct omap_device * omap_device_ref(struct omap_device *dev)
119 atomic_inc(&dev->refcnt);
123 void omap_device_del(struct omap_device *dev)
125 if (!atomic_dec_and_test(&dev->refcnt))
127 pthread_mutex_lock(&table_lock);
128 drmHashDestroy(dev->handle_table);
129 drmHashDelete(dev_table, dev->fd);
130 pthread_mutex_unlock(&table_lock);
134 int omap_get_param(struct omap_device *dev, uint64_t param, uint64_t *value)
136 struct drm_omap_param req = {
141 ret = drmCommandWriteRead(dev->fd, DRM_OMAP_GET_PARAM, &req, sizeof(req));
151 int omap_set_param(struct omap_device *dev, uint64_t param, uint64_t value)
153 struct drm_omap_param req = {
157 return drmCommandWrite(dev->fd, DRM_OMAP_SET_PARAM, &req, sizeof(req));
160 /* lookup a buffer from it's handle, call w/ table_lock held: */
161 static struct omap_bo * lookup_bo(struct omap_device *dev,
164 struct omap_bo *bo = NULL;
165 if (!drmHashLookup(dev->handle_table, handle, (void **)&bo)) {
166 /* found, incr refcnt and return: */
167 bo = omap_bo_ref(bo);
172 /* allocate a new buffer object, call w/ table_lock held */
173 static struct omap_bo * bo_from_handle(struct omap_device *dev,
176 struct omap_bo *bo = calloc(sizeof(*bo), 1);
178 struct drm_gem_close req = {
181 drmIoctl(dev->fd, DRM_IOCTL_GEM_CLOSE, &req);
184 bo->dev = omap_device_ref(dev);
186 atomic_set(&bo->refcnt, 1);
187 /* add ourselves to the handle table: */
188 drmHashInsert(dev->handle_table, handle, bo);
192 /* allocate a new buffer object */
193 static struct omap_bo * omap_bo_new_impl(struct omap_device *dev,
194 union omap_gem_size size, uint32_t flags)
196 struct omap_bo *bo = NULL;
197 struct drm_omap_gem_new req = {
202 if (size.bytes == 0) {
206 if (drmCommandWriteRead(dev->fd, DRM_OMAP_GEM_NEW, &req, sizeof(req))) {
210 pthread_mutex_lock(&table_lock);
211 bo = bo_from_handle(dev, req.handle);
212 pthread_mutex_unlock(&table_lock);
214 if (flags & OMAP_BO_TILED) {
215 bo->size = round_up(size.tiled.width, PAGE_SIZE) * size.tiled.height;
217 bo->size = size.bytes;
228 /* allocate a new (un-tiled) buffer object */
229 struct omap_bo * omap_bo_new(struct omap_device *dev,
230 uint32_t size, uint32_t flags)
232 union omap_gem_size gsize = {
235 if (flags & OMAP_BO_TILED) {
238 return omap_bo_new_impl(dev, gsize, flags);
241 /* allocate a new buffer object */
242 struct omap_bo * omap_bo_new_tiled(struct omap_device *dev,
243 uint32_t width, uint32_t height, uint32_t flags)
245 union omap_gem_size gsize = {
251 if (!(flags & OMAP_BO_TILED)) {
254 return omap_bo_new_impl(dev, gsize, flags);
257 struct omap_bo * omap_bo_ref(struct omap_bo *bo)
259 atomic_inc(&bo->refcnt);
263 /* get buffer info */
264 static int get_buffer_info(struct omap_bo *bo)
266 struct drm_omap_gem_info req = {
267 .handle = bo->handle,
269 int ret = drmCommandWriteRead(bo->dev->fd, DRM_OMAP_GEM_INFO,
275 /* really all we need for now is mmap offset */
276 bo->offset = req.offset;
282 /* import a buffer object from DRI2 name */
283 struct omap_bo * omap_bo_from_name(struct omap_device *dev, uint32_t name)
285 struct omap_bo *bo = NULL;
286 struct drm_gem_open req = {
290 pthread_mutex_lock(&table_lock);
292 if (drmIoctl(dev->fd, DRM_IOCTL_GEM_OPEN, &req)) {
296 bo = lookup_bo(dev, req.handle);
298 bo = bo_from_handle(dev, req.handle);
302 pthread_mutex_unlock(&table_lock);
307 pthread_mutex_unlock(&table_lock);
312 /* import a buffer from dmabuf fd, does not take ownership of the
313 * fd so caller should close() the fd when it is otherwise done
314 * with it (even if it is still using the 'struct omap_bo *')
316 struct omap_bo * omap_bo_from_dmabuf(struct omap_device *dev, int fd)
318 struct omap_bo *bo = NULL;
319 struct drm_prime_handle req = {
324 pthread_mutex_lock(&table_lock);
326 ret = drmIoctl(dev->fd, DRM_IOCTL_PRIME_FD_TO_HANDLE, &req);
331 bo = lookup_bo(dev, req.handle);
333 bo = bo_from_handle(dev, req.handle);
336 pthread_mutex_unlock(&table_lock);
341 pthread_mutex_unlock(&table_lock);
346 /* destroy a buffer object */
347 void omap_bo_del(struct omap_bo *bo)
353 if (!atomic_dec_and_test(&bo->refcnt))
357 munmap(bo->map, bo->size);
365 struct drm_gem_close req = {
366 .handle = bo->handle,
368 pthread_mutex_lock(&table_lock);
369 drmHashDelete(bo->dev->handle_table, bo->handle);
370 drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_CLOSE, &req);
371 pthread_mutex_unlock(&table_lock);
374 omap_device_del(bo->dev);
379 /* get the global flink/DRI2 buffer name */
380 int omap_bo_get_name(struct omap_bo *bo, uint32_t *name)
383 struct drm_gem_flink req = {
384 .handle = bo->handle,
388 ret = drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_FLINK, &req);
401 uint32_t omap_bo_handle(struct omap_bo *bo)
406 /* caller owns the dmabuf fd that is returned and is responsible
407 * to close() it when done
409 int omap_bo_dmabuf(struct omap_bo *bo)
412 struct drm_prime_handle req = {
413 .handle = bo->handle,
414 .flags = DRM_CLOEXEC,
418 ret = drmIoctl(bo->dev->fd, DRM_IOCTL_PRIME_HANDLE_TO_FD, &req);
428 uint32_t omap_bo_size(struct omap_bo *bo)
436 void * omap_bo_map(struct omap_bo *bo)
443 bo->map = mmap(0, bo->size, PROT_READ | PROT_WRITE,
444 MAP_SHARED, bo->dev->fd, bo->offset);
445 if (bo->map == MAP_FAILED) {
452 int omap_bo_cpu_prep(struct omap_bo *bo, enum omap_gem_op op)
454 struct drm_omap_gem_cpu_prep req = {
455 .handle = bo->handle,
458 return drmCommandWrite(bo->dev->fd,
459 DRM_OMAP_GEM_CPU_PREP, &req, sizeof(req));
462 int omap_bo_cpu_fini(struct omap_bo *bo, enum omap_gem_op op)
464 struct drm_omap_gem_cpu_fini req = {
465 .handle = bo->handle,
469 return drmCommandWrite(bo->dev->fd,
470 DRM_OMAP_GEM_CPU_FINI, &req, sizeof(req));