1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* Copyright(c) 2023 Advanced Micro Devices, Inc. */ 3 4 #ifndef _LM_H_ 5 #define _LM_H_ 6 7 #include <linux/fs.h> 8 #include <linux/mutex.h> 9 #include <linux/scatterlist.h> 10 #include <linux/types.h> 11 12 #include <linux/pds/pds_common.h> 13 #include <linux/pds/pds_adminq.h> 14 15 struct pds_vfio_lm_file { 16 struct file *filep; 17 struct mutex lock; /* protect live migration data file */ 18 u64 size; /* Size with valid data */ 19 u64 alloc_size; /* Total allocated size. Always >= len */ 20 void *page_mem; /* memory allocated for pages */ 21 struct page **pages; /* Backing pages for file */ 22 unsigned long long npages; 23 struct sg_table sg_table; /* SG table for backing pages */ 24 struct pds_lm_sg_elem *sgl; /* DMA mapping */ 25 dma_addr_t sgl_addr; 26 u16 num_sge; 27 struct scatterlist *last_offset_sg; /* Iterator */ 28 unsigned int sg_last_entry; 29 unsigned long last_offset; 30 bool disabled; 31 }; 32 33 struct pds_vfio_pci_device; 34 35 struct file * 36 pds_vfio_step_device_state_locked(struct pds_vfio_pci_device *pds_vfio, 37 enum vfio_device_mig_state next); 38 39 void pds_vfio_put_save_file(struct pds_vfio_pci_device *pds_vfio); 40 void pds_vfio_put_restore_file(struct pds_vfio_pci_device *pds_vfio); 41 42 #endif /* _LM_H_ */ 43