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83000c2754
Fix build errors when this driver compiled against K6.1 (kernel-oot) - Remove dma-iommu.h header inclusion as its not present in K6.1 - Define IOVA_RANGE_CACHE_MAX_SIZE if this macro is not defined - Import DMA_BUF "MODULE_IMPORT_NS(DMA_BUF);" to avoid below error "ERROR: modpost: module nvscic2c-pcie-epc uses symbol dma_buf_* from namespace DMA_BUF, but does not import it" Bug 3978996 Change-Id: Idd9a53b19c63467583b87f64ffa2c2e888ac02e1 Signed-off-by: Shardar Mohammed <smohammed@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2898149 Reviewed-by: Deepak Kumar Badgaiyan <dbadgaiyan@nvidia.com> Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com> GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
44 lines
1.2 KiB
C
44 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/* Copyright (c) 2022-2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved. */
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#ifndef __IOVA_ALLOC_H__
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#define __IOVA_ALLOC_H__
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#include <linux/device.h>
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#include <linux/iova.h>
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struct iova_alloc_domain_t;
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/*
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* iova_alloc_init
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*
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* With NvSciC2c usecase IOVA range needs to be allocated without
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* physical backing. Existing DMA API framework does not allow this.
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* Hence allocate new IOVA domain to allocate IOVA range.
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*
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* Allocate IOVA range using new IOVA domain.
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* Use this IOVA range in iommu_map() with existing IOMMU domain.
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*/
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int
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iova_alloc_init(struct device *dev, size_t size, dma_addr_t *dma_handle,
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struct iova_alloc_domain_t **ivd_h);
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/*
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* iova_alloc_deinit
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*
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* Free IOVA range allocated using iova_alloc_init.
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* Client needs to make sure that if physical mapping was created
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* then it is released before calling iova_alloc_deinit.
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* Release IOVA domain allocated in iova_alloc_init.
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*/
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void
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iova_alloc_deinit(dma_addr_t dma_handle, size_t size,
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struct iova_alloc_domain_t **ivd_h);
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#ifndef IOVA_RANGE_CACHE_MAX_SIZE
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#define IOVA_RANGE_CACHE_MAX_SIZE 6 /* log of max cached IOVA range size (in pages) */
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#endif
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#endif //__IOVA_ALLOC_H__
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