6fadb02126
This patch adds support for vfio_pci driver for mlx5 devices. It uses vfio_pci_core to register to the VFIO subsystem and then implements the mlx5 specific logic in the migration area. The migration implementation follows the definition from uapi/vfio.h and uses the mlx5 VF->PF command channel to achieve it. This patch implements the suspend/resume flows. Link: https://lore.kernel.org/all/20220224142024.147653-14-yishaih@nvidia.com Reviewed-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Yishai Hadas <yishaih@nvidia.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
37 lines
1.2 KiB
C
37 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
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/*
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* Copyright (c) 2021-2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
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*/
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#ifndef MLX5_VFIO_CMD_H
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#define MLX5_VFIO_CMD_H
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#include <linux/kernel.h>
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#include <linux/mlx5/driver.h>
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struct mlx5_vf_migration_file {
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struct file *filp;
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struct mutex lock;
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bool disabled;
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struct sg_append_table table;
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size_t total_length;
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size_t allocated_length;
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/* Optimize mlx5vf_get_migration_page() for sequential access */
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struct scatterlist *last_offset_sg;
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unsigned int sg_last_entry;
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unsigned long last_offset;
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};
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int mlx5vf_cmd_suspend_vhca(struct pci_dev *pdev, u16 vhca_id, u16 op_mod);
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int mlx5vf_cmd_resume_vhca(struct pci_dev *pdev, u16 vhca_id, u16 op_mod);
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int mlx5vf_cmd_query_vhca_migration_state(struct pci_dev *pdev, u16 vhca_id,
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size_t *state_size);
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int mlx5vf_cmd_get_vhca_id(struct pci_dev *pdev, u16 function_id, u16 *vhca_id);
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int mlx5vf_cmd_save_vhca_state(struct pci_dev *pdev, u16 vhca_id,
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struct mlx5_vf_migration_file *migf);
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int mlx5vf_cmd_load_vhca_state(struct pci_dev *pdev, u16 vhca_id,
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struct mlx5_vf_migration_file *migf);
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#endif /* MLX5_VFIO_CMD_H */
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