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This patch constructs an abstraction to hide the sync_fence functionality from the common code. struct nvgpu_os_fence acts as an abstraction for struct sync_fence. struct nvgpu_os_fence consists of an ops structure named nvgpu_os_fence_ops which contains an API to do pushbuffer programming to generate wait commands for the fence. The current implementation of nvgpu only allows for wait method on a sync_fence which was generated using a similar backend(i.e. either Nvhost Syncpoints or Semaphores). In this patch, a generic API is introduced which will decide the type of the underlying implementation of the struct nvgpu_os_fence at runtime and run the corresponding wait implementation on it. This patch changes the channel_sync_gk20a's semaphore specific implementation to use the abstract API. A subsequent patch will make the changes for the nvhost_syncpoint based implementations as well. JIRA NVGPU-66 Change-Id: If6675bfde5885c3d15d2ca380bb6c7c0e240e734 Signed-off-by: Debarshi Dutta <ddutta@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/1667218 Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
72 lines
1.9 KiB
C
72 lines
1.9 KiB
C
/*
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* Copyright (c) 2018, 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 "gk20a/gk20a.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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static void nvgpu_os_fence_clear(struct nvgpu_os_fence *fence_out)
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{
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fence_out->priv = NULL;
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fence_out->g = NULL;
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fence_out->ops = NULL;
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}
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void nvgpu_os_fence_init(struct nvgpu_os_fence *fence_out,
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struct gk20a *g, const struct nvgpu_os_fence_ops *fops,
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struct sync_fence *fence)
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{
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fence_out->g = g;
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fence_out->ops = fops;
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fence_out->priv = (void *)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_fdget(struct nvgpu_os_fence *fence_out,
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struct channel_gk20a *c, int fd)
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{
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int err;
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err = nvgpu_os_fence_sema_fdget(fence_out, c, fd);
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/* TO-DO
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* check if fence is empty and if CONFIG_TEGRA_GK20A_NVHOST
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* is enabled, try to get a sync_fence using
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* corresponding nvhost method.
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*/
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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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