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vfio: Introduce capability definitions for VFIO_DEVICE_GET_INFO 

Allow the VFIO_DEVICE_GET_INFO ioctl to include a capability chain.
Add a flag indicating capability chain support, and introduce the
definitions for the first set of capabilities which are specified to
s390 zPCI devices.

Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Matthew Rosato 2020-10-07 14:56:22 -04:00 committed by Alex Williamson
parent 517fe29824
commit 0c633f0be1
2 changed files with 89 additions and 0 deletions
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11
include/uapi/linux/vfio.h
View File

@ -201,8 +201,10 @@ struct vfio_device_info {
#define VFIO_DEVICE_FLAGS_AMBA (1 << 3) /* vfio-amba device */
#define VFIO_DEVICE_FLAGS_CCW (1 << 4) /* vfio-ccw device */
#define VFIO_DEVICE_FLAGS_AP (1 << 5) /* vfio-ap device */
#define VFIO_DEVICE_FLAGS_CAPS (1 << 7) /* Info supports caps */
__u32 num_regions; /* Max region index + 1 */
__u32 num_irqs; /* Max IRQ index + 1 */
__u32 cap_offset; /* Offset within info struct of first cap */
};
#define VFIO_DEVICE_GET_INFO _IO(VFIO_TYPE, VFIO_BASE + 7)
@ -218,6 +220,15 @@ struct vfio_device_info {
#define VFIO_DEVICE_API_CCW_STRING "vfio-ccw"
#define VFIO_DEVICE_API_AP_STRING "vfio-ap"
/*
* The following capabilities are unique to s390 zPCI devices. Their contents
* are further-defined in vfio_zdev.h
*/
#define VFIO_DEVICE_INFO_CAP_ZPCI_BASE 1
#define VFIO_DEVICE_INFO_CAP_ZPCI_GROUP 2
#define VFIO_DEVICE_INFO_CAP_ZPCI_UTIL 3
#define VFIO_DEVICE_INFO_CAP_ZPCI_PFIP 4
/**
* VFIO_DEVICE_GET_REGION_INFO - _IOWR(VFIO_TYPE, VFIO_BASE + 8,
* struct vfio_region_info)

78
include/uapi/linux/vfio_zdev.h Normal file
View File

@ -0,0 +1,78 @@
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* VFIO Region definitions for ZPCI devices
*
* Copyright IBM Corp. 2020
*
* Author(s): Pierre Morel <pmorel@linux.ibm.com>
* Matthew Rosato <mjrosato@linux.ibm.com>
*/
#ifndef _VFIO_ZDEV_H_
#define _VFIO_ZDEV_H_
#include <linux/types.h>
#include <linux/vfio.h>
/**
* VFIO_DEVICE_INFO_CAP_ZPCI_BASE - Base PCI Function information
*
* This capability provides a set of descriptive information about the
* associated PCI function.
*/
struct vfio_device_info_cap_zpci_base {
struct vfio_info_cap_header header;
__u64 start_dma; /* Start of available DMA addresses */
__u64 end_dma; /* End of available DMA addresses */
__u16 pchid; /* Physical Channel ID */
__u16 vfn; /* Virtual function number */
__u16 fmb_length; /* Measurement Block Length (in bytes) */
__u8 pft; /* PCI Function Type */
__u8 gid; /* PCI function group ID */
};
/**
* VFIO_DEVICE_INFO_CAP_ZPCI_GROUP - Base PCI Function Group information
*
* This capability provides a set of descriptive information about the group of
* PCI functions that the associated device belongs to.
*/
struct vfio_device_info_cap_zpci_group {
struct vfio_info_cap_header header;
__u64 dasm; /* DMA Address space mask */
__u64 msi_addr; /* MSI address */
__u64 flags;
#define VFIO_DEVICE_INFO_ZPCI_FLAG_REFRESH 1 /* Program-specified TLB refresh */
__u16 mui; /* Measurement Block Update Interval */
__u16 noi; /* Maximum number of MSIs */
__u16 maxstbl; /* Maximum Store Block Length */
__u8 version; /* Supported PCI Version */
};
/**
* VFIO_DEVICE_INFO_CAP_ZPCI_UTIL - Utility String
*
* This capability provides the utility string for the associated device, which
* is a device identifier string made up of EBCDID characters. 'size' specifies
* the length of 'util_str'.
*/
struct vfio_device_info_cap_zpci_util {
struct vfio_info_cap_header header;
__u32 size;
__u8 util_str[];
};
/**
* VFIO_DEVICE_INFO_CAP_ZPCI_PFIP - PCI Function Path
*
* This capability provides the PCI function path string, which is an identifier
* that describes the internal hardware path of the device. 'size' specifies
* the length of 'pfip'.
*/
struct vfio_device_info_cap_zpci_pfip {
struct vfio_info_cap_header header;
__u32 size;
__u8 pfip[];
};
#endif