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The os fences can currently be constructed from a file descriptor, from a raw syncpt id/value pair, or a struct nvgpu_semaphore. Each os fence object has exactly one owner for simplicity as the owner is a wrapper for a refcounted object. This does not allow copying the fences, so extend struct nvgpu_os_fence_ops with a member to increment the refcount of the underlying fence. This can be used to "duplicate" the object. The copy needs an eventual call to ops->drop_ref() to release the refcount. This will be useful to decouple the features of struct nvgpu_fence_type needed in the kernel and those needed for userspace. Jira NVGPU-5248 Change-Id: Ie7b943f0851f62842e941a7283b389bac84ae9ae Signed-off-by: Konsta Hölttä <kholtta@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2359063 Reviewed-by: automaticguardword <automaticguardword@nvidia.com> Reviewed-by: Alex Waterman <alexw@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> GVS: Gerrit_Virtual_Submit
78 lines
1.9 KiB
C
78 lines
1.9 KiB
C
/*
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* Copyright (c) 2018-2020, NVIDIA CORPORATION. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <nvgpu/types.h>
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#include <nvgpu/os_fence.h>
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#include <nvgpu/linux/os_fence_android.h>
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#include <nvgpu/gk20a.h>
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#include <nvgpu/channel.h>
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#include <nvgpu/nvhost.h>
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#include "os_fence_priv.h"
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#include "../drivers/staging/android/sync.h"
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inline struct sync_fence *nvgpu_get_sync_fence(struct nvgpu_os_fence *s)
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{
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struct sync_fence *fence = (struct sync_fence *)s->priv;
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return fence;
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}
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void nvgpu_os_fence_android_drop_ref(struct nvgpu_os_fence *s)
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{
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struct sync_fence *fence = nvgpu_get_sync_fence(s);
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sync_fence_put(fence);
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nvgpu_os_fence_clear(s);
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}
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int nvgpu_os_fence_android_install_fd(struct nvgpu_os_fence *s, int fd)
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{
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struct sync_fence *fence = nvgpu_get_sync_fence(s);
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sync_fence_get(fence);
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sync_fence_install(fence, fd);
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return 0;
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}
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void nvgpu_os_fence_android_dup(struct nvgpu_os_fence *s)
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{
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struct sync_fence *fence = nvgpu_get_sync_fence(s);
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sync_fence_get(fence);
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}
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int nvgpu_os_fence_fdget(struct nvgpu_os_fence *fence_out,
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struct nvgpu_channel *c, int fd)
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{
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int err = -ENOSYS;
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#ifdef CONFIG_TEGRA_GK20A_NVHOST
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if (nvgpu_has_syncpoints(c->g)) {
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err = nvgpu_os_fence_syncpt_fdget(fence_out, c, fd);
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}
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#endif
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if (err)
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err = nvgpu_os_fence_sema_fdget(fence_out, c, fd);
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if (err)
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nvgpu_err(c->g, "error obtaining fence from fd %d", fd);
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return err;
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}
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