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git://nv-tegra.nvidia.com/linux-nv-oot.git
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4adc5c8fb4
nvscic2c enables xfer between two SoC connected over PCIe. nvscic2c already available with K5.10 Major changes in nvscic2c-pcie for K5.15: Integrate with upstream PCIe endpoint function changes. Allocate new IOVA domain to be used for empty IOVA allocation. This IOVA range would be used in iommu_map() to map physical backing with IOMMU domain attached in PCIe device. Migrate from nvhost to host1x and tegra-drm interfaces. Bug 3739487 Jira C2C-826 Jira C2C-830 Change-Id: Ic4d8ac680921807fb17247855ca7037623681cb7 Signed-off-by: dbadgaiyan <dbadgaiyan@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2810806 Reviewed-by: Nagarjuna Kristam <nkristam@nvidia.com> Reviewed-by: Arihant Jejani <ajejani@nvidia.com> Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com> GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
49 lines
1.5 KiB
C
49 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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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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#endif //__IOVA_ALLOC_H__
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