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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>
73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (c) 2021-2022, 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_MNGR_H__
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#define __IOVA_MNGR_H__
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#include <linux/types.h>
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/*
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* iova_mngr_block_reserve
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*
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* Reserves a block from the free IOVA regions. Once reserved, the block
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* is marked reserved and appended in the reserved list. Use
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* iova_mngr_block_get_address to fetch the address of the block reserved.
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*/
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int
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iova_mngr_block_reserve(void *mngr_handle, size_t size,
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u64 *address, size_t *offset,
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void **block_handle);
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/*
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* iova_mngr_block_release
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*
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* Release an already reserved IOVA block/chunk by the caller back to
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* free list.
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*/
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int
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iova_mngr_block_release(void *mngr_handle, void **block_handle);
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/*
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* iova_mngr_print
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*
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* DEBUG only.
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*
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* Helper function to print all the reserved and free blocks with
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* their names, size and start address.
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*/
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void iova_mngr_print(void *handle);
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/*
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* iova_mngr_init
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*
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* Initialises the IOVA space manager with the base address + size
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* provided. IOVA manager would use two lists for book-keeping reserved
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* memory blocks and free memory blocks.
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*
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* When initialised all of the IOVA region: base_address + size is free.
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*/
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int
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iova_mngr_init(char *name, u64 base_address, size_t size, void **mngr_handle);
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/*
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* iova_mngr_deinit
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*
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* deinitialize the IOVA space manager. Any blocks unreturned from the client
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* (caller) shall become dangling.
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*/
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void
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iova_mngr_deinit(void **handle);
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#endif //__IOVA_MNGR_H__
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