71 lines
2.3 KiB
C
71 lines
2.3 KiB
C
/*
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* Copyright (c)2018, 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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#ifdef BEEGFS_NVFS
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#include <app/log/Logger.h>
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#include "Nvfs.h"
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struct nvfs_dma_rw_ops *nvfs_ops = NULL;
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atomic_t nvfs_shutdown = ATOMIC_INIT(1);
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DEFINE_PER_CPU(long, nvfs_n_ops);
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int REGISTER_FUNC (struct nvfs_dma_rw_ops *ops)
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{
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printk_fhgfs_debug(KERN_INFO, "%s:%d: register nvfs ops\n",
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__func__, __LINE__);
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if (NVIDIA_FS_CHECK_FT_SGLIST_DMA(ops) &&
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NVIDIA_FS_CHECK_FT_GPU_PAGE(ops) &&
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NVIDIA_FS_CHECK_FT_DEVICE_PRIORITY(ops))
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{
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nvfs_ops = ops;
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atomic_set(&nvfs_shutdown, 0);
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return 0;
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}
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return -ENOTSUPP;
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}
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EXPORT_SYMBOL(REGISTER_FUNC);
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void UNREGISTER_FUNC (void)
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{
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int ops;
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printk_fhgfs_debug(KERN_INFO, "%s:%d: begin unregister nvfs\n",
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__func__, __LINE__);
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(void) atomic_cmpxchg(&nvfs_shutdown, 0, 1);
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do
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{
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msleep(NVFS_HOLD_TIME_MS);
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ops = nvfs_count_ops();
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printk_fhgfs_debug(KERN_INFO, "%s:%d: nvfs_count_ops=%d\n",
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__func__, __LINE__, ops);
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}
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while (ops);
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nvfs_ops = NULL;
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printk_fhgfs_debug(KERN_INFO, "%s:%d: unregister nvfs complete\n",
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__func__, __LINE__);
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}
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EXPORT_SYMBOL(UNREGISTER_FUNC);
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#endif /* BEEGFS_NVFS */
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