linux-headers/linux/vfio_zdev.h

   1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2 /*
   3  * VFIO Region definitions for ZPCI devices
   4  *
   5  * Copyright IBM Corp. 2020
   6  *
   7  * Author(s): Pierre Morel <pmorel@linux.ibm.com>
   8  *            Matthew Rosato <mjrosato@linux.ibm.com>
   9  */
  10
  11 #ifndef _VFIO_ZDEV_H_
  12 #define _VFIO_ZDEV_H_
  13
  14 #include <linux/types.h>
  15 #include <linux/vfio.h>
  16
  17 /**
  18  * VFIO_DEVICE_INFO_CAP_ZPCI_BASE - Base PCI Function information
  19  *
  20  * This capability provides a set of descriptive information about the
  21  * associated PCI function.
  22  */
  23 struct vfio_device_info_cap_zpci_base {
  24         struct vfio_info_cap_header header;
  25         __u64 start_dma;        /* Start of available DMA addresses */
  26         __u64 end_dma;          /* End of available DMA addresses */
  27         __u16 pchid;            /* Physical Channel ID */
  28         __u16 vfn;              /* Virtual function number */
  29         __u16 fmb_length;       /* Measurement Block Length (in bytes) */
  30         __u8 pft;               /* PCI Function Type */
  31         __u8 gid;               /* PCI function group ID */
  32         /* End of version 1 */
  33         __u32 fh;               /* PCI function handle */
  34         /* End of version 2 */
  35 };
  36
  37 /**
  38  * VFIO_DEVICE_INFO_CAP_ZPCI_GROUP - Base PCI Function Group information
  39  *
  40  * This capability provides a set of descriptive information about the group of
  41  * PCI functions that the associated device belongs to.
  42  */
  43 struct vfio_device_info_cap_zpci_group {
  44         struct vfio_info_cap_header header;
  45         __u64 dasm;             /* DMA Address space mask */
  46         __u64 msi_addr;         /* MSI address */
  47         __u64 flags;
  48 #define VFIO_DEVICE_INFO_ZPCI_FLAG_REFRESH 1 /* Program-specified TLB refresh */
  49         __u16 mui;              /* Measurement Block Update Interval */
  50         __u16 noi;              /* Maximum number of MSIs */
  51         __u16 maxstbl;          /* Maximum Store Block Length */
  52         __u8 version;           /* Supported PCI Version */
  53         /* End of version 1 */
  54         __u8 reserved;
  55         __u16 imaxstbl;         /* Maximum Interpreted Store Block Length */
  56         /* End of version 2 */
  57 };
  58
  59 /**
  60  * VFIO_DEVICE_INFO_CAP_ZPCI_UTIL - Utility String
  61  *
  62  * This capability provides the utility string for the associated device, which
  63  * is a device identifier string made up of EBCDID characters.  'size' specifies
  64  * the length of 'util_str'.
  65  */
  66 struct vfio_device_info_cap_zpci_util {
  67         struct vfio_info_cap_header header;
  68         __u32 size;
  69         __u8 util_str[];
  70 };
  71
  72 /**
  73  * VFIO_DEVICE_INFO_CAP_ZPCI_PFIP - PCI Function Path
  74  *
  75  * This capability provides the PCI function path string, which is an identifier
  76  * that describes the internal hardware path of the device. 'size' specifies
  77  * the length of 'pfip'.
  78  */
  79 struct vfio_device_info_cap_zpci_pfip {
  80         struct vfio_info_cap_header header;
  81         __u32 size;
  82         __u8 pfip[];
  83 };
  84
  85 #endif