348 lines
7.4 KiB
C
348 lines
7.4 KiB
C
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/*
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* Copyright (C) 2014 Etnaviv Project
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Authors:
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* Christian Gmeiner <christian.gmeiner@gmail.com>
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include "etnaviv_priv.h"
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#include "etnaviv_drmif.h"
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drm_private pthread_mutex_t table_lock = PTHREAD_MUTEX_INITIALIZER;
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drm_private void bo_del(struct etna_bo *bo);
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/* set buffer name, and add to table, call w/ table_lock held: */
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static void set_name(struct etna_bo *bo, uint32_t name)
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{
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bo->name = name;
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/* add ourself into the name table: */
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drmHashInsert(bo->dev->name_table, name, bo);
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}
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/* Called under table_lock */
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drm_private void bo_del(struct etna_bo *bo)
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{
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if (bo->map)
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drm_munmap(bo->map, bo->size);
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if (bo->name)
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drmHashDelete(bo->dev->name_table, bo->name);
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if (bo->handle) {
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struct drm_gem_close req = {
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.handle = bo->handle,
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};
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drmHashDelete(bo->dev->handle_table, bo->handle);
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drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_CLOSE, &req);
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}
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free(bo);
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}
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/* lookup a buffer from it's handle, call w/ table_lock held: */
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static struct etna_bo *lookup_bo(void *tbl, uint32_t handle)
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{
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struct etna_bo *bo = NULL;
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if (!drmHashLookup(tbl, handle, (void **)&bo)) {
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/* found, incr refcnt and return: */
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bo = etna_bo_ref(bo);
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/* don't break the bucket if this bo was found in one */
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list_delinit(&bo->list);
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}
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return bo;
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}
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/* allocate a new buffer object, call w/ table_lock held */
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static struct etna_bo *bo_from_handle(struct etna_device *dev,
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uint32_t size, uint32_t handle, uint32_t flags)
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{
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struct etna_bo *bo = calloc(sizeof(*bo), 1);
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if (!bo) {
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struct drm_gem_close req = {
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.handle = handle,
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};
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drmIoctl(dev->fd, DRM_IOCTL_GEM_CLOSE, &req);
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return NULL;
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}
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bo->dev = etna_device_ref(dev);
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bo->size = size;
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bo->handle = handle;
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bo->flags = flags;
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atomic_set(&bo->refcnt, 1);
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list_inithead(&bo->list);
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/* add ourselves to the handle table: */
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drmHashInsert(dev->handle_table, handle, bo);
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return bo;
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}
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/* allocate a new (un-tiled) buffer object */
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struct etna_bo *etna_bo_new(struct etna_device *dev, uint32_t size,
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uint32_t flags)
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{
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struct etna_bo *bo;
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int ret;
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struct drm_etnaviv_gem_new req = {
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.flags = flags,
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};
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bo = etna_bo_cache_alloc(&dev->bo_cache, &size, flags);
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if (bo)
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return bo;
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req.size = size;
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ret = drmCommandWriteRead(dev->fd, DRM_ETNAVIV_GEM_NEW,
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&req, sizeof(req));
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if (ret)
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return NULL;
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pthread_mutex_lock(&table_lock);
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bo = bo_from_handle(dev, size, req.handle, flags);
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bo->reuse = 1;
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pthread_mutex_unlock(&table_lock);
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return bo;
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}
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struct etna_bo *etna_bo_ref(struct etna_bo *bo)
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{
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atomic_inc(&bo->refcnt);
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return bo;
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}
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/* get buffer info */
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static int get_buffer_info(struct etna_bo *bo)
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{
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int ret;
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struct drm_etnaviv_gem_info req = {
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.handle = bo->handle,
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};
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ret = drmCommandWriteRead(bo->dev->fd, DRM_ETNAVIV_GEM_INFO,
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&req, sizeof(req));
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if (ret) {
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return ret;
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}
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/* really all we need for now is mmap offset */
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bo->offset = req.offset;
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return 0;
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}
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/* import a buffer object from DRI2 name */
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struct etna_bo *etna_bo_from_name(struct etna_device *dev, uint32_t name)
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{
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struct etna_bo *bo;
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struct drm_gem_open req = {
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.name = name,
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};
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pthread_mutex_lock(&table_lock);
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/* check name table first, to see if bo is already open: */
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bo = lookup_bo(dev->name_table, req.handle);
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if (bo)
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goto out_unlock;
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if (drmIoctl(dev->fd, DRM_IOCTL_GEM_OPEN, &req)) {
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ERROR_MSG("gem-open failed: %s", strerror(errno));
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goto out_unlock;
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}
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bo = lookup_bo(dev->handle_table, req.handle);
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if (bo)
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goto out_unlock;
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bo = bo_from_handle(dev, req.size, req.handle, 0);
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if (bo)
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set_name(bo, name);
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out_unlock:
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pthread_mutex_unlock(&table_lock);
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return bo;
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}
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/* import a buffer from dmabuf fd, does not take ownership of the
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* fd so caller should close() the fd when it is otherwise done
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* with it (even if it is still using the 'struct etna_bo *')
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*/
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struct etna_bo *etna_bo_from_dmabuf(struct etna_device *dev, int fd)
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{
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struct etna_bo *bo;
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int ret, size;
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uint32_t handle;
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pthread_mutex_lock(&table_lock);
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ret = drmPrimeFDToHandle(dev->fd, fd, &handle);
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if (ret) {
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return NULL;
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}
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bo = lookup_bo(dev->handle_table, handle);
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if (bo)
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goto out_unlock;
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/* lseek() to get bo size */
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size = lseek(fd, 0, SEEK_END);
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lseek(fd, 0, SEEK_CUR);
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bo = bo_from_handle(dev, size, handle, 0);
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out_unlock:
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pthread_mutex_unlock(&table_lock);
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return bo;
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}
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/* destroy a buffer object */
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void etna_bo_del(struct etna_bo *bo)
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{
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struct etna_device *dev = bo->dev;
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if (!bo)
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return;
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if (!atomic_dec_and_test(&bo->refcnt))
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return;
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pthread_mutex_lock(&table_lock);
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if (bo->reuse && (etna_bo_cache_free(&dev->bo_cache, bo) == 0))
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goto out;
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bo_del(bo);
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etna_device_del_locked(dev);
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out:
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pthread_mutex_unlock(&table_lock);
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}
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/* get the global flink/DRI2 buffer name */
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int etna_bo_get_name(struct etna_bo *bo, uint32_t *name)
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{
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if (!bo->name) {
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struct drm_gem_flink req = {
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.handle = bo->handle,
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};
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int ret;
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ret = drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_FLINK, &req);
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if (ret) {
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return ret;
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}
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pthread_mutex_lock(&table_lock);
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set_name(bo, req.name);
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pthread_mutex_unlock(&table_lock);
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bo->reuse = 0;
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}
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*name = bo->name;
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return 0;
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}
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uint32_t etna_bo_handle(struct etna_bo *bo)
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{
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return bo->handle;
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}
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/* caller owns the dmabuf fd that is returned and is responsible
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* to close() it when done
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*/
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int etna_bo_dmabuf(struct etna_bo *bo)
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{
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int ret, prime_fd;
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ret = drmPrimeHandleToFD(bo->dev->fd, bo->handle, DRM_CLOEXEC,
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&prime_fd);
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if (ret) {
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ERROR_MSG("failed to get dmabuf fd: %d", ret);
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return ret;
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}
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bo->reuse = 0;
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return prime_fd;
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}
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uint32_t etna_bo_size(struct etna_bo *bo)
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{
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return bo->size;
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}
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void *etna_bo_map(struct etna_bo *bo)
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{
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if (!bo->map) {
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if (!bo->offset) {
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get_buffer_info(bo);
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}
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bo->map = drm_mmap(0, bo->size, PROT_READ | PROT_WRITE,
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MAP_SHARED, bo->dev->fd, bo->offset);
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if (bo->map == MAP_FAILED) {
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ERROR_MSG("mmap failed: %s", strerror(errno));
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bo->map = NULL;
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}
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}
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return bo->map;
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}
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int etna_bo_cpu_prep(struct etna_bo *bo, uint32_t op)
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{
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struct drm_etnaviv_gem_cpu_prep req = {
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.handle = bo->handle,
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.op = op,
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};
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get_abs_timeout(&req.timeout, 5000);
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return drmCommandWrite(bo->dev->fd, DRM_ETNAVIV_GEM_CPU_PREP,
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&req, sizeof(req));
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}
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void etna_bo_cpu_fini(struct etna_bo *bo)
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{
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struct drm_etnaviv_gem_cpu_fini req = {
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.handle = bo->handle,
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};
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drmCommandWrite(bo->dev->fd, DRM_ETNAVIV_GEM_CPU_FINI,
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&req, sizeof(req));
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}
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