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27a64f2e23
Add a "priv" fence struct type and use that in the fence type to emphasize that the inner data is not meant to be seen. The fence unit needs to have an outside-visible fence type so that fences can be allocated directly as a struct field in job metadata for performance and simplicity, so hiding the type entirely wouldn't work. A couple of places need to touch the priv data directly in channel code. Those can be thought to be technically fence unit's code scattered outside the fence files, but they mean that the architecture is not perfect yet. Jira NVGPU-5773 Change-Id: Ifa3c95757ae31eef0e32f2605293e23e210b065f Signed-off-by: Konsta Hölttä <kholtta@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2395071 Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
85 lines
2.7 KiB
C
85 lines
2.7 KiB
C
/*
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* Copyright (c) 2014-2020, NVIDIA CORPORATION. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include <nvgpu/nvhost.h>
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#include <nvgpu/fence.h>
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#include <nvgpu/fence_syncpt.h>
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#include "fence_priv.h"
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static int nvgpu_fence_syncpt_wait(struct nvgpu_fence_type *f, u32 timeout)
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{
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struct nvgpu_fence_type_priv *pf = &f->priv;
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return nvgpu_nvhost_syncpt_wait_timeout_ext(
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pf->nvhost_dev, pf->syncpt_id, pf->syncpt_value,
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timeout, NVGPU_NVHOST_DEFAULT_WAITER);
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}
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static bool nvgpu_fence_syncpt_is_expired(struct nvgpu_fence_type *f)
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{
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struct nvgpu_fence_type_priv *pf = &f->priv;
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/*
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* In cases we don't register a notifier, we can't expect the
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* syncpt value to be updated. For this case, we force a read
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* of the value from HW, and then check for expiration.
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*/
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if (!nvgpu_nvhost_syncpt_is_expired_ext(pf->nvhost_dev, pf->syncpt_id,
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pf->syncpt_value)) {
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u32 val;
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if (!nvgpu_nvhost_syncpt_read_ext_check(pf->nvhost_dev,
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pf->syncpt_id, &val)) {
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return nvgpu_nvhost_syncpt_is_expired_ext(
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pf->nvhost_dev,
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pf->syncpt_id, pf->syncpt_value);
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}
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}
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return true;
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}
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static void nvgpu_fence_syncpt_free(struct nvgpu_fence_type *f)
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{
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}
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static const struct nvgpu_fence_ops nvgpu_fence_syncpt_ops = {
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.wait = nvgpu_fence_syncpt_wait,
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.is_expired = nvgpu_fence_syncpt_is_expired,
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.free = nvgpu_fence_syncpt_free,
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};
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/* This function takes the ownership of the os_fence */
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void nvgpu_fence_from_syncpt(
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struct nvgpu_fence_type *f,
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struct nvgpu_nvhost_dev *nvhost_dev,
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u32 id, u32 value, struct nvgpu_os_fence os_fence)
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{
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struct nvgpu_fence_type_priv *pf = &f->priv;
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nvgpu_fence_init(f, &nvgpu_fence_syncpt_ops, os_fence);
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pf->nvhost_dev = nvhost_dev;
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pf->syncpt_id = id;
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pf->syncpt_value = value;
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}
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