/* * 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 #include #include #include #include #include #include #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; }