drm/etnaviv/etnaviv_bo.c

349 lines
7.6 KiB
C

/*
* Copyright (C) 2014 Etnaviv Project
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Authors:
* Christian Gmeiner <christian.gmeiner@gmail.com>
*/
#include "etnaviv_priv.h"
#include "etnaviv_drmif.h"
drm_private pthread_mutex_t table_lock = PTHREAD_MUTEX_INITIALIZER;
drm_private void bo_del(struct etna_bo *bo);
/* set buffer name, and add to table, call w/ table_lock held: */
static void set_name(struct etna_bo *bo, uint32_t name)
{
bo->name = name;
/* add ourself into the name table: */
drmHashInsert(bo->dev->name_table, name, bo);
}
/* Called under table_lock */
drm_private void bo_del(struct etna_bo *bo)
{
if (bo->map)
drm_munmap(bo->map, bo->size);
if (bo->name)
drmHashDelete(bo->dev->name_table, bo->name);
if (bo->handle) {
struct drm_gem_close req = {
.handle = bo->handle,
};
drmHashDelete(bo->dev->handle_table, bo->handle);
drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_CLOSE, &req);
}
free(bo);
}
/* lookup a buffer from it's handle, call w/ table_lock held: */
static struct etna_bo *lookup_bo(void *tbl, uint32_t handle)
{
struct etna_bo *bo = NULL;
if (!drmHashLookup(tbl, handle, (void **)&bo)) {
/* found, incr refcnt and return: */
bo = etna_bo_ref(bo);
/* don't break the bucket if this bo was found in one */
list_delinit(&bo->list);
}
return bo;
}
/* allocate a new buffer object, call w/ table_lock held */
static struct etna_bo *bo_from_handle(struct etna_device *dev,
uint32_t size, uint32_t handle, uint32_t flags)
{
struct etna_bo *bo = calloc(sizeof(*bo), 1);
if (!bo) {
struct drm_gem_close req = {
.handle = handle,
};
drmIoctl(dev->fd, DRM_IOCTL_GEM_CLOSE, &req);
return NULL;
}
bo->dev = etna_device_ref(dev);
bo->size = size;
bo->handle = handle;
bo->flags = flags;
atomic_set(&bo->refcnt, 1);
list_inithead(&bo->list);
/* add ourselves to the handle table: */
drmHashInsert(dev->handle_table, handle, bo);
return bo;
}
/* allocate a new (un-tiled) buffer object */
struct etna_bo *etna_bo_new(struct etna_device *dev, uint32_t size,
uint32_t flags)
{
struct etna_bo *bo;
int ret;
struct drm_etnaviv_gem_new req = {
.flags = flags,
};
bo = etna_bo_cache_alloc(&dev->bo_cache, &size, flags);
if (bo)
return bo;
req.size = size;
ret = drmCommandWriteRead(dev->fd, DRM_ETNAVIV_GEM_NEW,
&req, sizeof(req));
if (ret)
return NULL;
pthread_mutex_lock(&table_lock);
bo = bo_from_handle(dev, size, req.handle, flags);
bo->reuse = 1;
pthread_mutex_unlock(&table_lock);
return bo;
}
struct etna_bo *etna_bo_ref(struct etna_bo *bo)
{
atomic_inc(&bo->refcnt);
return bo;
}
/* get buffer info */
static int get_buffer_info(struct etna_bo *bo)
{
int ret;
struct drm_etnaviv_gem_info req = {
.handle = bo->handle,
};
ret = drmCommandWriteRead(bo->dev->fd, DRM_ETNAVIV_GEM_INFO,
&req, sizeof(req));
if (ret) {
return ret;
}
/* really all we need for now is mmap offset */
bo->offset = req.offset;
return 0;
}
/* import a buffer object from DRI2 name */
struct etna_bo *etna_bo_from_name(struct etna_device *dev, uint32_t name)
{
struct etna_bo *bo;
struct drm_gem_open req = {
.name = name,
};
pthread_mutex_lock(&table_lock);
/* check name table first, to see if bo is already open: */
bo = lookup_bo(dev->name_table, name);
if (bo)
goto out_unlock;
if (drmIoctl(dev->fd, DRM_IOCTL_GEM_OPEN, &req)) {
ERROR_MSG("gem-open failed: %s", strerror(errno));
goto out_unlock;
}
bo = lookup_bo(dev->handle_table, req.handle);
if (bo)
goto out_unlock;
bo = bo_from_handle(dev, req.size, req.handle, 0);
if (bo)
set_name(bo, name);
out_unlock:
pthread_mutex_unlock(&table_lock);
return bo;
}
/* import a buffer from dmabuf fd, does not take ownership of the
* fd so caller should close() the fd when it is otherwise done
* with it (even if it is still using the 'struct etna_bo *')
*/
struct etna_bo *etna_bo_from_dmabuf(struct etna_device *dev, int fd)
{
struct etna_bo *bo;
int ret, size;
uint32_t handle;
/* take the lock before calling drmPrimeFDToHandle to avoid
* racing against etna_bo_del, which might invalidate the
* returned handle.
*/
pthread_mutex_lock(&table_lock);
ret = drmPrimeFDToHandle(dev->fd, fd, &handle);
if (ret) {
pthread_mutex_unlock(&table_lock);
return NULL;
}
bo = lookup_bo(dev->handle_table, handle);
if (bo)
goto out_unlock;
/* lseek() to get bo size */
size = lseek(fd, 0, SEEK_END);
lseek(fd, 0, SEEK_CUR);
bo = bo_from_handle(dev, size, handle, 0);
out_unlock:
pthread_mutex_unlock(&table_lock);
return bo;
}
/* destroy a buffer object */
void etna_bo_del(struct etna_bo *bo)
{
struct etna_device *dev = bo->dev;
if (!bo)
return;
if (!atomic_dec_and_test(&bo->refcnt))
return;
pthread_mutex_lock(&table_lock);
if (bo->reuse && (etna_bo_cache_free(&dev->bo_cache, bo) == 0))
goto out;
bo_del(bo);
etna_device_del_locked(dev);
out:
pthread_mutex_unlock(&table_lock);
}
/* get the global flink/DRI2 buffer name */
int etna_bo_get_name(struct etna_bo *bo, uint32_t *name)
{
if (!bo->name) {
struct drm_gem_flink req = {
.handle = bo->handle,
};
int ret;
ret = drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_FLINK, &req);
if (ret) {
return ret;
}
pthread_mutex_lock(&table_lock);
set_name(bo, req.name);
pthread_mutex_unlock(&table_lock);
bo->reuse = 0;
}
*name = bo->name;
return 0;
}
uint32_t etna_bo_handle(struct etna_bo *bo)
{
return bo->handle;
}
/* caller owns the dmabuf fd that is returned and is responsible
* to close() it when done
*/
int etna_bo_dmabuf(struct etna_bo *bo)
{
int ret, prime_fd;
ret = drmPrimeHandleToFD(bo->dev->fd, bo->handle, DRM_CLOEXEC,
&prime_fd);
if (ret) {
ERROR_MSG("failed to get dmabuf fd: %d", ret);
return ret;
}
bo->reuse = 0;
return prime_fd;
}
uint32_t etna_bo_size(struct etna_bo *bo)
{
return bo->size;
}
void *etna_bo_map(struct etna_bo *bo)
{
if (!bo->map) {
if (!bo->offset) {
get_buffer_info(bo);
}
bo->map = drm_mmap(0, bo->size, PROT_READ | PROT_WRITE,
MAP_SHARED, bo->dev->fd, bo->offset);
if (bo->map == MAP_FAILED) {
ERROR_MSG("mmap failed: %s", strerror(errno));
bo->map = NULL;
}
}
return bo->map;
}
int etna_bo_cpu_prep(struct etna_bo *bo, uint32_t op)
{
struct drm_etnaviv_gem_cpu_prep req = {
.handle = bo->handle,
.op = op,
};
get_abs_timeout(&req.timeout, 5000000000);
return drmCommandWrite(bo->dev->fd, DRM_ETNAVIV_GEM_CPU_PREP,
&req, sizeof(req));
}
void etna_bo_cpu_fini(struct etna_bo *bo)
{
struct drm_etnaviv_gem_cpu_fini req = {
.handle = bo->handle,
};
drmCommandWrite(bo->dev->fd, DRM_ETNAVIV_GEM_CPU_FINI,
&req, sizeof(req));
}