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Add live migration support via the VFIO subsystem. The migration implementation aligns with the definition from uapi/vfio.h and uses the pds_core PF's adminq for device configuration. The ability to suspend, resume, and transfer VF device state data is included along with the required admin queue command structures and implementations. PDS_LM_CMD_SUSPEND and PDS_LM_CMD_SUSPEND_STATUS are added to support the VF device suspend operation. PDS_LM_CMD_RESUME is added to support the VF device resume operation. PDS_LM_CMD_STATE_SIZE is added to determine the exact size of the VF device state data. PDS_LM_CMD_SAVE is added to get the VF device state data. PDS_LM_CMD_RESTORE is added to restore the VF device with the previously saved data from PDS_LM_CMD_SAVE. PDS_LM_CMD_HOST_VF_STATUS is added to notify the DSC/firmware when a migration is in/not-in progress from the host's perspective. The DSC/firmware can use this to clear/setup any necessary state related to a migration. Signed-off-by: Brett Creeley <brett.creeley@amd.com> Signed-off-by: Shannon Nelson <shannon.nelson@amd.com> Reviewed-by: Simon Horman <horms@kernel.org> Reviewed-by: Kevin Tian <kevin.tian@intel.com> Reviewed-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Link: https://lore.kernel.org/r/20230807205755.29579-6-brett.creeley@amd.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
17 lines
803 B
C
17 lines
803 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright(c) 2023 Advanced Micro Devices, Inc. */
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#ifndef _CMDS_H_
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#define _CMDS_H_
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int pds_vfio_register_client_cmd(struct pds_vfio_pci_device *pds_vfio);
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void pds_vfio_unregister_client_cmd(struct pds_vfio_pci_device *pds_vfio);
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int pds_vfio_suspend_device_cmd(struct pds_vfio_pci_device *pds_vfio, u8 type);
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int pds_vfio_resume_device_cmd(struct pds_vfio_pci_device *pds_vfio, u8 type);
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int pds_vfio_get_lm_state_size_cmd(struct pds_vfio_pci_device *pds_vfio, u64 *size);
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int pds_vfio_get_lm_state_cmd(struct pds_vfio_pci_device *pds_vfio);
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int pds_vfio_set_lm_state_cmd(struct pds_vfio_pci_device *pds_vfio);
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void pds_vfio_send_host_vf_lm_status_cmd(struct pds_vfio_pci_device *pds_vfio,
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enum pds_lm_host_vf_status vf_status);
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#endif /* _CMDS_H_ */
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