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/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright(c) 2023 Advanced Micro Devices, Inc. */
#ifndef _LM_H_
#define _LM_H_
#include <linux/fs.h>
#include <linux/mutex.h>
#include <linux/scatterlist.h>
#include <linux/types.h>
#include <linux/pds/pds_common.h>
#include <linux/pds/pds_adminq.h>
struct pds_vfio_lm_file {
struct file *filep;
struct mutex lock; /* protect live migration data file */
u64 size; /* Size with valid data */
u64 alloc_size; /* Total allocated size. Always >= len */
void *page_mem; /* memory allocated for pages */
struct page **pages; /* Backing pages for file */
unsigned long long npages;
struct sg_table sg_table; /* SG table for backing pages */
struct pds_lm_sg_elem *sgl; /* DMA mapping */
dma_addr_t sgl_addr;
u16 num_sge;
struct scatterlist *last_offset_sg; /* Iterator */
unsigned int sg_last_entry;
unsigned long last_offset;
};
struct pds_vfio_pci_device;
struct file *
pds_vfio_step_device_state_locked(struct pds_vfio_pci_device *pds_vfio,
enum vfio_device_mig_state next);
void pds_vfio_put_save_file(struct pds_vfio_pci_device *pds_vfio);
void pds_vfio_put_restore_file(struct pds_vfio_pci_device *pds_vfio);
#endif /* _LM_H_ */
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