66 lines
2.4 KiB
C
66 lines
2.4 KiB
C
|
/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */
|
||
|
|
/*
|
||
|
|
* Copyright (C) 2021 Intel Corporation
|
||
|
|
* Author: Johannes Berg <johannes@sipsolutions.net>
|
||
|
|
*/
|
||
|
|
#ifndef _UAPI_LINUX_VIRTIO_PCIDEV_H
|
||
|
|
#define _UAPI_LINUX_VIRTIO_PCIDEV_H
|
||
|
|
#include <linux/types.h>
|
||
|
|
|
||
|
|
/**
|
||
|
|
* enum virtio_pcidev_ops - virtual PCI device operations
|
||
|
|
* @VIRTIO_PCIDEV_OP_RESERVED: reserved to catch errors
|
||
|
|
* @VIRTIO_PCIDEV_OP_CFG_READ: read config space, size is 1, 2, 4 or 8;
|
||
|
|
* the @data field should be filled in by the device (in little endian).
|
||
|
|
* @VIRTIO_PCIDEV_OP_CFG_WRITE: write config space, size is 1, 2, 4 or 8;
|
||
|
|
* the @data field contains the data to write (in little endian).
|
||
|
|
* @VIRTIO_PCIDEV_OP_MMIO_READ: read BAR mem/pio, size can be variable;
|
||
|
|
* the @data field should be filled in by the device (in little endian).
|
||
|
|
* @VIRTIO_PCIDEV_OP_MMIO_WRITE: write BAR mem/pio, size can be variable;
|
||
|
|
* the @data field contains the data to write (in little endian).
|
||
|
|
* @VIRTIO_PCIDEV_OP_MMIO_MEMSET: memset MMIO, size is variable but
|
||
|
|
* the @data field only has one byte (unlike @VIRTIO_PCIDEV_OP_MMIO_WRITE)
|
||
|
|
* @VIRTIO_PCIDEV_OP_INT: legacy INTx# pin interrupt, the addr field is 1-4 for
|
||
|
|
* the number
|
||
|
|
* @VIRTIO_PCIDEV_OP_MSI: MSI(-X) interrupt, this message basically transports
|
||
|
|
* the 16- or 32-bit write that would otherwise be done into memory,
|
||
|
|
* analogous to the write messages (@VIRTIO_PCIDEV_OP_MMIO_WRITE) above
|
||
|
|
* @VIRTIO_PCIDEV_OP_PME: Dummy message whose content is ignored (and should be
|
||
|
|
* all zeroes) to signal the PME# pin.
|
||
|
|
*/
|
||
|
|
enum virtio_pcidev_ops {
|
||
|
|
VIRTIO_PCIDEV_OP_RESERVED = 0,
|
||
|
|
VIRTIO_PCIDEV_OP_CFG_READ,
|
||
|
|
VIRTIO_PCIDEV_OP_CFG_WRITE,
|
||
|
|
VIRTIO_PCIDEV_OP_MMIO_READ,
|
||
|
|
VIRTIO_PCIDEV_OP_MMIO_WRITE,
|
||
|
|
VIRTIO_PCIDEV_OP_MMIO_MEMSET,
|
||
|
|
VIRTIO_PCIDEV_OP_INT,
|
||
|
|
VIRTIO_PCIDEV_OP_MSI,
|
||
|
|
VIRTIO_PCIDEV_OP_PME,
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct virtio_pcidev_msg - virtio PCI device operation
|
||
|
|
* @op: the operation to do
|
||
|
|
* @bar: the bar (only with BAR read/write messages)
|
||
|
|
* @reserved: reserved
|
||
|
|
* @size: the size of the read/write (in bytes)
|
||
|
|
* @addr: the address to read/write
|
||
|
|
* @data: the data, normally @size long, but just one byte for
|
||
|
|
* %VIRTIO_PCIDEV_OP_MMIO_MEMSET
|
||
|
|
*
|
||
|
|
* Note: the fields are all in native (CPU) endian, however, the
|
||
|
|
* @data values will often be in little endian (see the ops above.)
|
||
|
|
*/
|
||
|
|
struct virtio_pcidev_msg {
|
||
|
|
__u8 op;
|
||
|
|
__u8 bar;
|
||
|
|
__u16 reserved;
|
||
|
|
__u32 size;
|
||
|
|
__u64 addr;
|
||
|
|
__u8 data[];
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif /* _UAPI_LINUX_VIRTIO_PCIDEV_H */
|