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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>
137 lines
3.9 KiB
C
137 lines
3.9 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 __PCI_CLIENT_H__
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#define __PCI_CLIENT_H__
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#include <uapi/misc/nvscic2c-pcie-ioctl.h>
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#include "common.h"
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#include "module.h"
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/* forward declaration.*/
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struct vm_area_struct;
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struct dma_buf;
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struct dma_buf_attachment;
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/*
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* PCI client initialization parameters. The fields must remain persistent
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* till deinitialization (exit).
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*/
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struct pci_client_params {
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struct dma_buff_t *self_mem;
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struct pci_aper_t *peer_mem;
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/*
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* @DRV_MODE_EPC: &pci_dev->dev
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* @DRV_MODE_EPF: epf->epc->dev.parent.
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*/
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struct device *dev;
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};
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/* Initialize PCI client either for @DRV_MODE_EPF or @DRV_MODE_EPC. */
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int
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pci_client_init(struct pci_client_params *params, void **pci_client_h);
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/* Teardown of PCI client. */
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void
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pci_client_deinit(void **pci_client_h);
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/* reserve iova using the iova-manager.*/
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int
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pci_client_alloc_iova(void *pci_client_h, size_t size, u64 *address,
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size_t *offset, void **block_h);
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/* free the reserved iova.*/
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int
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pci_client_free_iova(void *pci_client_h, void **block_h);
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int
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pci_client_map_addr(void *pci_client_h, u64 to_iova, phys_addr_t paddr,
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size_t size, int prot);
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size_t
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pci_client_unmap_addr(void *pci_client_h, u64 from_iova, size_t size);
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/* get the pci aperture for a given offset.*/
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int
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pci_client_get_peer_aper(void *pci_client_h, size_t offsetof, size_t size,
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phys_addr_t *phys_addr);
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/* attach dma-buf to pci device.*/
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struct dma_buf_attachment *
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pci_client_dmabuf_attach(void *pci_client_h, struct dma_buf *dmabuff);
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/* detach dma-buf to pci device.*/
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void
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pci_client_dmabuf_detach(void *pci_client_h, struct dma_buf *dmabuff,
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struct dma_buf_attachment *attach);
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/*
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* Users/Units can register for PCI link events as received by
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* @DRV_MODE_EPF or @DRV_MODE_EPC module sbstraction.
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*/
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int
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pci_client_register_for_link_event(void *pci_client_h,
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struct callback_ops *ops, u32 *id);
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/* Unregister for PCI link events. - teardown only. */
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int
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pci_client_unregister_for_link_event(void *pci_client_h, u32 id);
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/*
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* Update the PCI link status as received in @DRV_MODE_EPF or @DRV_MODE_EPC
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* module abstraction. Propagate the link status to registered users.
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*/
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int
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pci_client_change_link_status(void *pci_client_h,
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enum nvscic2c_pcie_link status);
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/* Helper function to mmap the PCI link status memory to user-space.*/
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int
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pci_client_mmap_link_mem(void *pci_client_h, struct vm_area_struct *vma);
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/* Query PCI link status. */
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enum nvscic2c_pcie_link
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pci_client_query_link_status(void *pci_client_h);
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/*
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* Helper functions to set and set driver context from pci_client_h
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*/
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/* Save driver context of DRV_MODE_EPF or DRV_MODE_EPC */
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int
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pci_client_save_driver_ctx(void *pci_client_h, struct driver_ctx_t *drv_ctx);
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/* Getter driver context of DRV_MODE_EPF or DRV_MODE_EPC */
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struct driver_ctx_t *
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pci_client_get_driver_ctx(void *pci_client_h);
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/*getter drv mode */
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enum drv_mode_t
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pci_client_get_drv_mode(void *pci_client_h);
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/* save peer cpu sent by boottrap msg */
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int
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pci_client_save_peer_cpu(void *pci_client_h, enum peer_cpu_t peer_cpu);
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/* Getter the soc/arch of rp */
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enum peer_cpu_t
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pci_client_get_peer_cpu(void *pci_client_h);
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/* Get allocated edma rx desc iova */
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dma_addr_t
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pci_client_get_edma_rx_desc_iova(void *pci_client_h);
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/* pci client raise irq to rp */
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int
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pci_client_raise_irq(void *pci_client_h, enum pci_epc_irq_type type, u16 num);
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#endif // __PCI_CLIENT_H__
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