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6d836becf5
If NEXT bit remains set for a channel being unbound, it can lead to MMU fault of type unbound inst block. When userspace is closing the channel and NEXT bit is set, userspace retries. When force killing the channel, nvgpu can retry few iterations to ensure the channel is truly idle and unbound. If the channel is really stuck then unbind will fail and TSG will be aborted. Bug 3800844 Change-Id: I8fb024630ff2dd272245ae27116f3db6d6e0f788 Signed-off-by: Sagar Kamble <skamble@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2787533 (cherry picked from commit 99e39f4b387743a93b05ba4b097c33b23fbbcf68) Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2786479 Reviewed-by: Vaibhav Kachore <vkachore@nvidia.com> GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
41 lines
1.5 KiB
C
41 lines
1.5 KiB
C
/*
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* Copyright (c) 2021-2022, 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/channel.h>
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#include <nvgpu/dma.h>
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#include <nvgpu/gk20a.h>
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#include "hal/fifo/tsg_ga10b.h"
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int ga10b_tsg_unbind_channel_check_hw_next(struct nvgpu_channel *ch,
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struct nvgpu_channel_hw_state *hw_state)
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{
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if (hw_state->next) {
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nvgpu_log_info(ch->g, "Channel %d to be removed "
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"from TSG %d has NEXT set!",
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ch->chid, ch->tsgid);
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return -EAGAIN;
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}
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return 0;
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}
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