diff options
Diffstat (limited to 'tegra/tegra.c')
| -rw-r--r-- | tegra/tegra.c | 354 |
1 files changed, 354 insertions, 0 deletions
diff --git a/tegra/tegra.c b/tegra/tegra.c new file mode 100644 index 0000000..6a51c43 --- /dev/null +++ b/tegra/tegra.c @@ -0,0 +1,354 @@ +/* + * 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. + */ + +#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; + + if (bo->map) + munmap(bo->map, bo->size); + + drmCloseBufferHandle(drm->fd, bo->handle); + + 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; +} + +drm_public int drm_tegra_new(int fd, struct drm_tegra **drmp) +{ + 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); +} + +drm_public void drm_tegra_close(struct drm_tegra *drm) +{ + if (!drm) + return; + + if (drm->close) + close(drm->fd); + + free(drm); +} + +static struct drm_tegra_bo *drm_tegra_bo_alloc(struct drm_tegra *drm, + uint32_t handle, + uint32_t flags, + uint32_t size) +{ + struct drm_tegra_bo *bo; + + bo = calloc(1, sizeof(*bo)); + if (!bo) + return NULL; + + atomic_set(&bo->ref, 1); + bo->handle = handle; + bo->flags = flags; + bo->size = size; + bo->drm = drm; + + return bo; +} + +drm_public int +drm_tegra_bo_new(struct drm_tegra *drm, uint32_t flags, uint32_t size, + struct drm_tegra_bo **bop) +{ + struct drm_tegra_gem_create args; + struct drm_tegra_bo *bo; + int err; + + if (!drm || size == 0 || !bop) + return -EINVAL; + + bo = drm_tegra_bo_alloc(drm, 0, flags, size); + if (!bo) + return -ENOMEM; + + 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; +} + +drm_public int +drm_tegra_bo_wrap(struct drm_tegra *drm, uint32_t handle, uint32_t flags, + uint32_t size, struct drm_tegra_bo **bop) +{ + struct drm_tegra_bo *bo; + + if (!drm || !bop) + return -EINVAL; + + bo = drm_tegra_bo_alloc(drm, handle, flags, size); + if (!bo) + return -ENOMEM; + + *bop = bo; + + return 0; +} + +drm_public struct drm_tegra_bo *drm_tegra_bo_ref(struct drm_tegra_bo *bo) +{ + if (bo) + atomic_inc(&bo->ref); + + return bo; +} + +drm_public void drm_tegra_bo_unref(struct drm_tegra_bo *bo) +{ + if (bo && atomic_dec_and_test(&bo->ref)) + drm_tegra_bo_free(bo); +} + +drm_public int +drm_tegra_bo_get_handle(struct drm_tegra_bo *bo, uint32_t *handle) +{ + if (!bo || !handle) + return -EINVAL; + + *handle = bo->handle; + + return 0; +} + +drm_public 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 = drm_mmap(NULL, 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; +} + +drm_public 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; +} + +drm_public int drm_tegra_bo_get_name(struct drm_tegra_bo *bo, uint32_t *name) +{ + struct drm_tegra *drm = bo->drm; + struct drm_gem_flink args; + int err; + + memset(&args, 0, sizeof(args)); + args.handle = bo->handle; + + err = drmIoctl(drm->fd, DRM_IOCTL_GEM_FLINK, &args); + if (err < 0) + return err; + + if (name) + *name = args.name; + + return 0; +} + +drm_public int +drm_tegra_bo_open(struct drm_tegra *drm, uint32_t name, uint32_t flags, + struct drm_tegra_bo **bop) +{ + struct drm_gem_open args; + struct drm_tegra_bo *bo; + int err; + + bo = drm_tegra_bo_alloc(drm, 0, flags, 0); + if (!bo) + return -ENOMEM; + + memset(&args, 0, sizeof(args)); + args.name = name; + + err = drmIoctl(drm->fd, DRM_IOCTL_GEM_OPEN, &args); + if (err < 0) + goto free; + + bo->handle = args.handle; + bo->size = args.size; + + *bop = bo; + + return 0; + +free: + free(bo); + return err; +} + +drm_public int drm_tegra_bo_export(struct drm_tegra_bo *bo, uint32_t flags) +{ + int fd, err; + + flags |= DRM_CLOEXEC; + + err = drmPrimeHandleToFD(bo->drm->fd, bo->handle, flags, &fd); + if (err < 0) + return err; + + return fd; +} + +static ssize_t fd_get_size(int fd) +{ + ssize_t size, offset; + int err; + + offset = lseek(fd, 0, SEEK_CUR); + if (offset < 0) + return -errno; + + size = lseek(fd, 0, SEEK_END); + if (size < 0) + return -errno; + + err = lseek(fd, offset, SEEK_SET); + if (err < 0) + return -errno; + + return size; +} + +drm_public int +drm_tegra_bo_import(struct drm_tegra *drm, int fd, struct drm_tegra_bo **bop) +{ + struct drm_tegra_bo *bo; + ssize_t size; + int err; + + size = fd_get_size(fd); + if (size < 0) + return size; + + bo = drm_tegra_bo_alloc(drm, 0, 0, size); + if (!bo) + return -ENOMEM; + + err = drmPrimeFDToHandle(drm->fd, fd, &bo->handle); + if (err < 0) + goto free; + + *bop = bo; + + return 0; + +free: + free(bo); + return err; +} |