xenocara/lib/libdrm/tegra/tegra.c
2015-08-21 23:55:36 +00:00

333 lines
6.3 KiB
C

/*
* Copyright © 2012, 2013 Thierry Reding
* Copyright © 2013 Erik Faye-Lund
* Copyright © 2014 NVIDIA Corporation
*
* 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include <sys/mman.h>
#include <xf86drm.h>
#include <tegra_drm.h>
#include "private.h"
static void drm_tegra_bo_free(struct drm_tegra_bo *bo)
{
struct drm_tegra *drm = bo->drm;
struct drm_gem_close args;
if (bo->map)
munmap(bo->map, bo->size);
memset(&args, 0, sizeof(args));
args.handle = bo->handle;
drmIoctl(drm->fd, DRM_IOCTL_GEM_CLOSE, &args);
free(bo);
}
static int drm_tegra_wrap(struct drm_tegra **drmp, int fd, bool close)
{
struct drm_tegra *drm;
if (fd < 0 || !drmp)
return -EINVAL;
drm = calloc(1, sizeof(*drm));
if (!drm)
return -ENOMEM;
drm->close = close;
drm->fd = fd;
*drmp = drm;
return 0;
}
int drm_tegra_new(struct drm_tegra **drmp, int fd)
{
bool supported = false;
drmVersionPtr version;
version = drmGetVersion(fd);
if (!version)
return -ENOMEM;
if (!strncmp(version->name, "tegra", version->name_len))
supported = true;
drmFreeVersion(version);
if (!supported)
return -ENOTSUP;
return drm_tegra_wrap(drmp, fd, false);
}
void drm_tegra_close(struct drm_tegra *drm)
{
if (!drm)
return;
if (drm->close)
close(drm->fd);
free(drm);
}
int drm_tegra_bo_new(struct drm_tegra_bo **bop, struct drm_tegra *drm,
uint32_t flags, uint32_t size)
{
struct drm_tegra_gem_create args;
struct drm_tegra_bo *bo;
int err;
if (!drm || size == 0 || !bop)
return -EINVAL;
bo = calloc(1, sizeof(*bo));
if (!bo)
return -ENOMEM;
atomic_set(&bo->ref, 1);
bo->flags = flags;
bo->size = size;
bo->drm = drm;
memset(&args, 0, sizeof(args));
args.flags = flags;
args.size = size;
err = drmCommandWriteRead(drm->fd, DRM_TEGRA_GEM_CREATE, &args,
sizeof(args));
if (err < 0) {
err = -errno;
free(bo);
return err;
}
bo->handle = args.handle;
*bop = bo;
return 0;
}
int drm_tegra_bo_wrap(struct drm_tegra_bo **bop, struct drm_tegra *drm,
uint32_t handle, uint32_t flags, uint32_t size)
{
struct drm_tegra_bo *bo;
if (!drm || !bop)
return -EINVAL;
bo = calloc(1, sizeof(*bo));
if (!bo)
return -ENOMEM;
atomic_set(&bo->ref, 1);
bo->handle = handle;
bo->flags = flags;
bo->size = size;
bo->drm = drm;
*bop = bo;
return 0;
}
struct drm_tegra_bo *drm_tegra_bo_ref(struct drm_tegra_bo *bo)
{
if (bo)
atomic_inc(&bo->ref);
return bo;
}
void drm_tegra_bo_unref(struct drm_tegra_bo *bo)
{
if (bo && atomic_dec_and_test(&bo->ref))
drm_tegra_bo_free(bo);
}
int drm_tegra_bo_get_handle(struct drm_tegra_bo *bo, uint32_t *handle)
{
if (!bo || !handle)
return -EINVAL;
*handle = bo->handle;
return 0;
}
int drm_tegra_bo_map(struct drm_tegra_bo *bo, void **ptr)
{
struct drm_tegra *drm = bo->drm;
if (!bo->map) {
struct drm_tegra_gem_mmap args;
int err;
memset(&args, 0, sizeof(args));
args.handle = bo->handle;
err = drmCommandWriteRead(drm->fd, DRM_TEGRA_GEM_MMAP, &args,
sizeof(args));
if (err < 0)
return -errno;
bo->offset = args.offset;
bo->map = mmap(0, bo->size, PROT_READ | PROT_WRITE, MAP_SHARED,
drm->fd, bo->offset);
if (bo->map == MAP_FAILED) {
bo->map = NULL;
return -errno;
}
}
if (ptr)
*ptr = bo->map;
return 0;
}
int drm_tegra_bo_unmap(struct drm_tegra_bo *bo)
{
if (!bo)
return -EINVAL;
if (!bo->map)
return 0;
if (munmap(bo->map, bo->size))
return -errno;
bo->map = NULL;
return 0;
}
int drm_tegra_bo_get_flags(struct drm_tegra_bo *bo, uint32_t *flags)
{
struct drm_tegra_gem_get_flags args;
struct drm_tegra *drm = bo->drm;
int err;
if (!bo)
return -EINVAL;
memset(&args, 0, sizeof(args));
args.handle = bo->handle;
err = drmCommandWriteRead(drm->fd, DRM_TEGRA_GEM_GET_FLAGS, &args,
sizeof(args));
if (err < 0)
return -errno;
if (flags)
*flags = args.flags;
return 0;
}
int drm_tegra_bo_set_flags(struct drm_tegra_bo *bo, uint32_t flags)
{
struct drm_tegra_gem_get_flags args;
struct drm_tegra *drm = bo->drm;
int err;
if (!bo)
return -EINVAL;
memset(&args, 0, sizeof(args));
args.handle = bo->handle;
args.flags = flags;
err = drmCommandWriteRead(drm->fd, DRM_TEGRA_GEM_SET_FLAGS, &args,
sizeof(args));
if (err < 0)
return -errno;
return 0;
}
int drm_tegra_bo_get_tiling(struct drm_tegra_bo *bo,
struct drm_tegra_bo_tiling *tiling)
{
struct drm_tegra_gem_get_tiling args;
struct drm_tegra *drm = bo->drm;
int err;
if (!bo)
return -EINVAL;
memset(&args, 0, sizeof(args));
args.handle = bo->handle;
err = drmCommandWriteRead(drm->fd, DRM_TEGRA_GEM_GET_TILING, &args,
sizeof(args));
if (err < 0)
return -errno;
if (tiling) {
tiling->mode = args.mode;
tiling->value = args.value;
}
return 0;
}
int drm_tegra_bo_set_tiling(struct drm_tegra_bo *bo,
const struct drm_tegra_bo_tiling *tiling)
{
struct drm_tegra_gem_set_tiling args;
struct drm_tegra *drm = bo->drm;
int err;
if (!bo)
return -EINVAL;
memset(&args, 0, sizeof(args));
args.handle = bo->handle;
args.mode = tiling->mode;
args.value = tiling->value;
err = drmCommandWriteRead(drm->fd, DRM_TEGRA_GEM_SET_TILING, &args,
sizeof(args));
if (err < 0)
return -errno;
return 0;
}