drivers/vfio/pci/pds/lm.h

   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_ */