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f2088fd15d
Modify nvscic2c-pcie files to use updated licenses as per nvidia-oot. Bug 3739487 Jira C2C-826 Change-Id: I819b459fdb0743d37bc08b4c9b92097d87e62884 Signed-off-by: dbadgaiyan <dbadgaiyan@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2830686 Reviewed-by: svcacv <svcacv@nvidia.com> Reviewed-by: Arihant Jejani <ajejani@nvidia.com> Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com> GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
128 lines
3.2 KiB
C
128 lines
3.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/* Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved. */
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#ifndef __COMM_CHANNEL_H__
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#define __COMM_CHANNEL_H__
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#include <uapi/misc/nvscic2c-pcie-ioctl.h>
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#include "common.h"
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/* forward declaration. */
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struct driver_ctx_t;
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enum comm_msg_type {
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/* invalid.*/
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COMM_MSG_TYPE_INVALID = 0,
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/*
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* One time message from peer @DRV_MODE_EPC (PCIe RP) towards
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* @DRV_MODE_EPF(PCIe EP) for boot-strap mechanism.
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*/
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COMM_MSG_TYPE_BOOTSTRAP,
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/* Link status shared between @DRV_MODE_EPC and @DRV_MODE_EPF.*/
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COMM_MSG_TYPE_LINK,
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/* Share/Register export object with peer.*/
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COMM_MSG_TYPE_REGISTER,
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/* Unregister exported object back with peer.*/
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COMM_MSG_TYPE_UNREGISTER,
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/* return edma rx descriptor iova to peer x86 */
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COMM_MSG_TYPE_EDMA_RX_DESC_IOVA_RETURN,
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/*
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* One time message from peer @DRV_MODE_EPC (PCIe RP) towards
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* @DRV_MODE_EPF(PCIe EP) for initiating shutdown.
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*/
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COMM_MSG_TYPE_SHUTDOWN,
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/* Maximum. */
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COMM_MSG_TYPE_MAXIMUM,
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};
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/*
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* For @DRV_MODE_EPF(PCIe EP), it doesn't know the send area towards
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* @DRV_MODE_EPC (PCIe RP - there is not BAR with PCIe RP). This is the first
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* message and only once sent by @DRV_MODE_EPC towards @DRV_MODE_EPF for latter
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* to configure it's outbound translation.
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*/
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struct comm_msg_bootstrap {
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u64 iova;
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enum peer_cpu_t peer_cpu;
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};
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/* to simply,only one channel c2c remote edma case */
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struct comm_msg_edma_rx_desc_iova {
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dma_addr_t iova;
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};
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/* Link status shared between @DRV_MODE_EPC and @DRV_MODE_EPF.
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* Possible use: @DRV_MODE_EPC sends bootstrap message
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* to @DRV_MODE_EPF without setting it's own PCIe link = UP, therefore,
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* on compeleting initialization, @DRV_MODE_EPF(once bootstrap msg
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* is received) shall send link = up message to @DRV_MODE_EPC.
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*/
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struct comm_msg_link {
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enum nvscic2c_pcie_link status;
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};
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/*
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* Private channel communication message sent by NvSciC2cPcie consumer
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* towards producer to register the exported object at the NvSciC2cPcie
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* producer SoC.
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*/
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struct comm_msg_register {
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u64 export_desc;
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u64 iova;
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size_t size;
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size_t offsetof;
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};
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/*
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* Private channel communication message sent by NvSciC2cPcie producer
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* towards onsumer to unregister it's exported object.
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*/
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struct comm_msg_unregister {
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u64 export_desc;
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u64 iova;
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size_t size;
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size_t offsetof;
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};
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struct comm_msg {
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enum comm_msg_type type;
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union data {
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struct comm_msg_bootstrap bootstrap;
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struct comm_msg_link link;
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struct comm_msg_register reg;
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struct comm_msg_unregister unreg;
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struct comm_msg_edma_rx_desc_iova edma_rx_desc_iova;
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} u;
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} __aligned(8);
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int
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comm_channel_init(struct driver_ctx_t *drv_ctx, void **comm_channel_h);
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void
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comm_channel_deinit(void **comm_channel_h);
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int
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comm_channel_msg_send(void *comm_channel_h, struct comm_msg *msg);
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int
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comm_channel_ctrl_msg_send(void *comm_channel_h, struct comm_msg *msg);
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int
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comm_channel_register_msg_cb(void *comm_channel_h, enum comm_msg_type type,
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struct callback_ops *ops);
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int
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comm_channel_unregister_msg_cb(void *comm_channel_h, enum comm_msg_type type);
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int
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comm_channel_edma_rx_desc_iova_send(void *comm_channel_h, struct comm_msg *msg);
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#endif //__COMM_CHANNEL_H__
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