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e8b7a5ca26
Use SPDX license GPL-V2.0 format and change Nvidia copyright year to include 2023. Bug 4078035 Change-Id: I4db6577ddb806690f6ec04f5eaf1364578102d14 Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2890635 Reviewed-by: Jonathan Hunter <jonathanh@nvidia.com> Reviewed-by: Ketan Patil <ketanp@nvidia.com> GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
63 lines
1.2 KiB
C
63 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2011-2023, NVIDIA Corporation. All rights reserved.
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*/
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#include <linux/xarray.h>
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#include <linux/dma-buf.h>
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#include "nvmap_priv.h"
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#define XA_START (U32_MAX / 2)
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/*
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* Initialize xarray mapping
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*/
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void nvmap_id_array_init(struct xarray *id_arr)
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{
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xa_init_flags(id_arr, XA_FLAGS_ALLOC1);
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}
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/*
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* Remove id to dma_buf mapping
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*/
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void nvmap_id_array_exit(struct xarray *id_arr)
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{
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xa_destroy(id_arr);
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}
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/*
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* Create mapping between the id(NvRmMemHandle) and dma_buf
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*/
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int nvmap_id_array_id_alloc(struct xarray *id_arr, u32 *id, struct dma_buf *dmabuf)
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{
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if (!id_arr || !dmabuf)
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return -EINVAL;
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return xa_alloc(id_arr, id, dmabuf,
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XA_LIMIT(XA_START, U32_MAX), GFP_KERNEL);
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}
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/*
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* Clear mapping between the id(NvRmMemHandle) and dma_buf
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*/
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struct dma_buf *nvmap_id_array_id_release(struct xarray *id_arr, u32 id)
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{
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if (!id_arr || !id)
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return NULL;
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return xa_erase(id_arr, id);
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}
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/*
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* Return dma_buf from the id.
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*/
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struct dma_buf *nvmap_id_array_get_dmabuf_from_id(struct xarray *id_arr, u32 id)
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{
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struct dma_buf *dmabuf;
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dmabuf = xa_load(id_arr, id);
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if (!IS_ERR_OR_NULL(dmabuf))
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get_dma_buf(dmabuf);
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return dmabuf;
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}
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